JP4577870B2 - mattress - Google Patents
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- JP4577870B2 JP4577870B2 JP2003351446A JP2003351446A JP4577870B2 JP 4577870 B2 JP4577870 B2 JP 4577870B2 JP 2003351446 A JP2003351446 A JP 2003351446A JP 2003351446 A JP2003351446 A JP 2003351446A JP 4577870 B2 JP4577870 B2 JP 4577870B2
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- 239000002344 surface layer Substances 0.000 claims description 46
- 239000006260 foam Substances 0.000 claims description 31
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000010410 layer Substances 0.000 claims description 21
- 239000011162 core material Substances 0.000 claims description 10
- 208000004210 Pressure Ulcer Diseases 0.000 description 12
- 239000006185 dispersion Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 210000004705 lumbosacral region Anatomy 0.000 description 7
- 206010011985 Decubitus ulcer Diseases 0.000 description 5
- 238000010030 laminating Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 230000037396 body weight Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 208000008035 Back Pain Diseases 0.000 description 1
- 206010016322 Feeling abnormal Diseases 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
- A47C27/148—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays of different resilience
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
- A47C27/142—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with projections, depressions or cavities
- A47C27/146—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays with projections, depressions or cavities on the outside surface of the mattress or cushion
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
- A47C27/14—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays
- A47C27/15—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with foamed material inlays consisting of two or more layers
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- Mattresses And Other Support Structures For Chairs And Beds (AREA)
- Invalid Beds And Related Equipment (AREA)
Description
本発明は、柔らかさと、身体の部位別に応じた支持力を兼ね備えたマットレスであって、健常者の他にも、腕の行動が不自由な人等において、特に肘を含めた腕部分の蓐瘡（床ずれ）予防に有効なマットレスに関する。 The present invention is a mattress that has both softness and supporting force according to the body part. The present invention relates to a mattress that is effective in preventing bedsores.
従来、蓐瘡（床ずれ）予防等の体への抵抗緩和に有効なマットレスとして、低反発ウレタンフォームのみからなるマットレスなど、厚みのある低反発ウレタンフォーム層を有する体圧分散性の高いマットレスが知られている。（例えば、特許文献１参照。） Conventionally, mattresses with high body pressure dispersibility with thick low-resilience urethane foam layers, such as mattresses consisting only of low-resilience urethane foam, have been known as effective mattresses for reducing body resistance, such as preventing pressure ulcers (bed slippage). It has been. (For example, refer to Patent Document 1.)
ところで、上記のようなマットレスは、体圧分散性は非常に良好であるものの、腰部や胸部の沈み込みが大きいため寝姿勢が健常時と異なるようになり、比較的自由に動ける患者にとっては、腰を痛める原因にもなりかねない。
また、健常者向けマットレスとして、腰部を支持する領域を硬めにし、腰部の沈み込みを抑えるようにしたマットレスがある。しかし、長時間マットレス上に横になっている患者がこのようなマットレスを使用すると、特に腰部において体圧の集中する部分が局在化し、蓐瘡ができやすくなるという問題があった。
更に、腰部の沈み込みを抑えるために腰部を支持するマットレスの領域を硬くすると、腕の不自由な患者等においては、肘に蓐瘡ができやすくなるという問題があった。これを改善するために、マットレスの長さ方向に対して両サイドの部分を柔らかめのウレタンフォームで構成するという考えもあったが、使用者の体格等によって腕部を支持する領域が異なり、広く一般の人に対応できるマットレスにできなかった。
By the way, although the mattress as described above has very good body pressure dispersibility, the sleeping posture becomes different from normal because the depression of the waist and chest is large, and for patients who can move relatively freely, It can also cause back pain.
In addition, as a mattress for a healthy person, there is a mattress in which a region that supports the lumbar region is hardened so that depression of the lumbar region is suppressed. However, when such a mattress is used by a patient who has been lying on the mattress for a long time, there is a problem that a part where the body pressure is concentrated is localized, particularly in the lower back, and pressure ulcer is easily formed.
Furthermore, if the area of the mattress that supports the lumbar region is hardened in order to suppress the depression of the lumbar region, there is a problem that pressure ulcers can easily be formed on the elbows in patients with limited arms. In order to improve this, there was also an idea that the parts on both sides with respect to the length direction of the mattress were made of soft urethane foam, but the area to support the arm part was different depending on the physique of the user, It was not possible to make a mattress that could be widely used by the general public.
そこで本発明は、特に腰部の沈み込みを抑制しつつ、良好な体圧分散性を有するだけでなく、比較的荷重の大きい要部と比較的荷重の小さい腕部の混在する領域においても、比較的荷重の小さい腕部の蓐瘡予防効果等の体への抵抗緩和を有するマットレスを得ることを目的とする。 Therefore, the present invention not only has good body pressure dispersibility while suppressing the lowering of the lumbar region in particular, but also in a region where a main part with a relatively large load and an arm part with a relatively small load are mixed. An object of the present invention is to obtain a mattress having relaxation resistance to the body, such as a pressure ulcer prevention effect of an arm portion having a small static load.
上記目的を達成するため本発明は、少なくとも表面側に積層される表面層と下面側に積層される下面層と前記下面層の裏面側に積層される裏面層の三層からなるウレタンフォーム製のマットレス芯材を有するマットレスにおいて、前記表面層を、厚さが１０〜３０ｍｍで反発弾性率が１〜２０％である低反発ウレタンフォームとし、前記下面層を、厚さが４０〜１２０ｍｍで硬さが１００〜３００Ｎにするとともに、少なくとも頭部・胸部を支持する部分、腰部を支持する部分、脚部を支持する部分の三つの部分から構成するようにし、腰部を支持する部分が、頭部・胸部を支持する部分及び脚部を支持する部分よりも硬い軟質ウレタンフォームとし、前記裏面層を、硬さが３０〜７０Ｎのソフトウレタンフォームから構成し、裏面層の厚みを１０〜３０ｍｍで表面層とは異なる厚みで積層するようにした。
In order to achieve the above object, the present invention is made of urethane foam comprising at least three layers: a front surface layer laminated on the front surface side, a lower surface layer laminated on the lower surface side, and a back surface layer laminated on the rear surface side of the lower surface layer. in mattress having a mattress core, the surface layer, the thickness of 1-20% rebound rate 10~30mm foam forms, the lower surface layer, the thickness is hard at 40~120mm 100-300N, and at least the head / chest part is supported, the waist part is supported, the leg part is supported, and the waist part is supported by the head part. · chest and stiff flexible polyurethane foam than the part which supports the parts and the legs for supporting, the back surface layer, the hardness constitute a soft urethane foam 30～70N, the thickness of the backside layer It was set to be stacked in different thicknesses to the surface layer at 10 to 30 mm.
このように、マットレス芯材の下面層の硬さを１００〜３００Ｎにするとともに、人体の腰部を支持する部分が、頭部・胸部を支持する部分及び脚部を支持する部分よりも硬い軟質ウレタンフォームであるようにすれば、体全体の体圧分散効果が得られると同時に、腰部付近の沈み込みが抑制され、また、その上に１０〜３０ｍｍの薄肉の低反発ウレタンフォームからなる上面層を積層すれば、比較的荷重の小さい腕部の体圧分散効果も得られ、腕部を含む体全体の蓐瘡予防が図られる。
ここで、下面層の硬さが３００Ｎを超えるようになると、クッション性やソフト感が損なわれるようになり、１００Ｎ未満になると、沈み込み量が多くなって底つき感が生じるようになる。また、反発弾性率１〜２０％程度の低反発ウレタンフォームの表面層は、粘弾性が非常に大きく、圧力を加えるとゆっくり沈み込み、圧力を解除するとゆっくり復元するような特性を有しているため、腕部のように軽い荷重のものに対して体圧分散効果があり、また、硬さが３０〜７０Ｎ程度のソフトウレタンフォームの裏面層は、硬さが柔らかいため腕部のように軽い荷重のものに対して体圧分散効果がある。
尚、表面層の厚みが１０ｍｍ未満であると、腕部の体圧分散が効果的に行われず、３０ｍｍを超えると、腰部付近の沈み込み量が多くなって好ましくない。
In this way, the hardness of the lower surface layer of the mattress core material is set to 100 to 300 N, and the portion that supports the waist of the human body is harder than the portion that supports the head and chest and the portion that supports the leg. If such is the form, at the same time pressure dispersion effect of the entire body can be obtained, sinking of the lumbar region is suppressed, also, the upper surface layer comprising a thin urethane foam form of 10~30mm thereon The body pressure dispersion effect of the arm part with a relatively small load is also obtained, and pressure ulcer prevention of the whole body including the arm part can be achieved.
Here, when the hardness of the lower surface layer exceeds 300 N, cushioning properties and soft feeling are impaired, and when it is less than 100 N, the sinking amount increases and a feeling of bottoming occurs. Moreover, the surface layer of the low-resilience urethane foam having a rebound resilience of about 1 to 20% has a very large viscoelasticity, and has a characteristic of slowly sinking when pressure is applied and slowly restoring when pressure is released. Therefore, there is a body pressure dispersion effect for light loads such as arms, and the back layer of soft urethane foam having a hardness of about 30 to 70 N is light like arms because the hardness is soft. It has a body pressure dispersion effect against the load.
If the thickness of the surface layer is less than 10 mm, the body pressure dispersion of the arm portion is not effectively performed, and if it exceeds 30 mm, the amount of subsidence near the waist increases, which is not preferable.
また下面層として、頭部・胸部を支持する部分と、腰部を支持する部分と、脚部を支持する部分の硬さを異ならせるようにすれば、人体部位の荷重に応じた体圧分散が適切に図られて蓐瘡予防をより効果的ならしめることができる。 In addition, if the hardness of the part that supports the head and chest, the part that supports the waist, and the part that supports the legs are made different as the lower layer, the body pressure distribution according to the load on the human body part is distributed. Properly designed to make pressure ulcer prevention more effective.
また、前記下面層の裏面側に、硬さが３０〜７０Ｎで厚みが１０〜３０ｍｍのソフトウレタンフォームの裏面層を、表面層とは異なる厚みで積層することにより、体格や体重等が異なる人がマットレスを裏返して裏面側を使用して蓐瘡予防を図ることができるようになる。
In addition , a person having a different physique, weight, or the like by laminating a back surface layer of a soft urethane foam having a hardness of 30 to 70 N and a thickness of 10 to 30 mm on the back surface side of the lower surface layer with a thickness different from the surface layer. However, the mattress can be turned over and the back side can be used to prevent pressure ulcers.
なお、上記のような反発弾性率は、ＪＩＳ Ｋ ６４００のＡ法で測定したものであり、また、硬さも、ＪＩＳ Ｋ ６４００のＡ法で測定したものである。 The rebound resilience as described above was measured by the A method of JIS K 6400, and the hardness was also measured by the A method of JIS K 6400.
ウレタンフォーム製のマットレス芯材の下面層の硬さを所定範囲内とし、その上に薄肉（１０〜３０ｍｍ）の低反発ウレタンフォームからなる表面層を積層することにより、荷重が大きい腰部付近の沈み込み抑制と体圧分散が図られると同時に、表面層の薄肉の低反発ウレタンフォームによって、腕部の荷重分散が図られる。このため、本発明は、特に腰部の沈み込みを抑制しつつ、良好な体圧分散性を有するだけでなく、比較的荷重の大きい腰部と比較的荷重の小さい腕部の混在する領域においても、比較的荷重の小さい腕部の蓐瘡予防効果等の体への抵抗緩和を有するマットレスを得ることができる。
この際、下面層として、頭部・胸部を支持する部分と、腰部を支持する部分と、脚部を支持する部分の硬さを変えれば、全身がバランス良く支持される。
また、下面層の裏面側に表面層とは厚みの異なるソフトウレタンフォームからなる裏面層を積層して三層構造にすることで、体格や体重等が異なる人がマットレスを裏返して使用して蓐瘡予防を図ることができるようになる。
The hardness of the lower surface layer of urethane foam mattresses core is within a predetermined range, by laminating a surface layer made of urethane foam Form thin (10 to 30 mm) thereon, in the vicinity of the load is large waist At the same time sinking suppression and pressure dispersion is achieved, I by the thin urethane foam Form of the surface layer, the load distribution of the arm portions is achieved. For this reason, the present invention not only has good body pressure dispersibility while suppressing the sinking of the lumbar part, but also in the region where the lumbar part having a relatively large load and the arm part having a relatively small load are mixed, A mattress having relaxation of resistance to the body such as a pressure ulcer prevention effect of an arm portion having a relatively small load can be obtained.
At this time, if the hardness of the portion supporting the head / chest, the portion supporting the waist, and the portion supporting the leg is changed as the lower layer, the whole body is supported in a balanced manner.
Also, by the three-layer structure by laminating a back surface layer made of different of Rusofu bets urethane foam has a thickness of the back side surface layer of the lower surface layer, physique and body weight and the like are different people using Flip the mattress It will be possible to prevent pressure ulcers.
本発明の実施の形態について添付した図面に基づき説明する。ここで図１は本マットレスに適用されるマットレス芯材の基本構造を示す説明図、図２は裏面層を設けた場合の説明図、図３は表面層にプロファイル加工を施した場合の説明図である。 Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is an explanatory diagram showing a basic structure of a mattress core material applied to the mattress, FIG. 2 is an explanatory diagram when a back surface layer is provided, and FIG. 3 is an explanatory diagram when a profile processing is performed on the surface layer. It is.
本発明に係るマットレスは、特に腕の不自由な寝たきり者等にとって、荷重の大きい腰部付近の沈み込みの抑制と体圧分散の向上を図ると同時に、荷重の小さい腕部の体圧分散性にも配慮されており、腕部を含んだ体全体の蓐瘡予防に有効なマットレスとして構成されている。 The mattress according to the present invention suppresses subsidence near the lumbar region where the load is large and improves the dispersion of body pressure, especially for a bedridden person who has difficulty in the arm, and at the same time improves the body pressure dispersibility of the arm portion with a small load. Is considered as a mattress that is effective in preventing pressure ulcers throughout the body including the arms.
すなわち、図１に示すように、本マットレスに適用されるマットレス芯材１の基本構造は、少なくともウレタンフォーム製の下面層２と、この下面層２の表面側に積層される表面層３を備えており、前記下面層２は、人体の頭部・胸部付近を支持する頭部・胸部部分２ａと、人体の腰部付近を支持する腰部部分２ｂと、脚部付近を支持する脚部部分２ｃに三分割されている。
That is, as shown in FIG. 1, the basic structure of the mattress core material 1 applied to the present mattress includes at least a
ここで、三分割された下面層２としては、腰部部分２ｂが頭部・胸部部分２ａや脚部部分２ｃより硬めとなるウレタンフォームを使用するようにしており、本実施例では、腰部部分２ｂとしては、硬さ１５０Ｎ程度、反発弾性率３３％程度の特性を有するものにするとともに、頭部・胸部部分２ａと脚部部分２ｃについては、硬さ１１５Ｎ程度、反発弾性率３５％程度の特性を有するものとし、厚みを５５ｍｍ程度としている。
Here, as the
尚、三分割された下面層２としては、硬さが腰部部分２ｂ＞頭部・胸部部分２ａ＞脚部部分２ｃの順に柔らかくなるようなウレタンフォームを使用するようにしても良い。
The
前記表面層３は、硬さ４５Ｎ、反発弾性率３％程度の低反発ウレタンフォームとしており、厚みを２５ｍｍ程度にしている。
因みに、このような低反発ウレタンフォームは、粘弾性が非常に大きく、圧力を加えるとゆっくり沈み込み、圧力を解除するとゆっくり復元するような特性を有している。
The
Incidentally, such a low-resilience urethane foam has very high viscoelasticity, and has a characteristic of slowly sinking when pressure is applied and slowly restoring when pressure is released.
以上のようなマットレス１において、三分割された下面層２によって全身がバランス良く支持されて最良の寝心地姿勢が確保されるとともに、体圧が適切に分散されるようになり、また、腰部付近では荷重の軽い腕部に対して腰部部分２ｂだけでは体圧分散が適切になされない傾向にあるが、表面層３の存在によって腕部の体圧分散も適切に行われる。
In the mattress 1 as described above, the whole body is supported in a well-balanced manner by the divided
ところで、図２は下面層２の裏面側に、硬さ１００Ｎ程度、反発弾性率１％程度、厚み１０ｍｍ程度の低反発ウレタンフォームからなる裏面層４を積層して三層構造にした構成例であり、このマットレス芯材１では、裏返して使用することにより、体重や体格の異なる人でも体圧分散効果を発揮できるようにしたものであり、適用範囲を広げることができる。
2 shows a configuration example in which a back layer 4 made of low-resilience urethane foam having a hardness of about 100 N, a rebound resilience of about 1%, and a thickness of about 10 mm is laminated on the back side of the
また、表面層３としては、図３に示すように、表面にプロファイル加工するようにしても良く、この場合、肌触り性の向上や通気性の向上等が図られる。
Further, as shown in FIG. 3, the
尚、以上の構成例においては、裏面層４として低反発ウレタンフォームを使用する例を示したが、低反発ウレタンフォームの代わりに、硬さ３０〜７０Ｎ程度のソフトウレタンフォームを使用するようにしても良く、この場合でも、比較的荷重の軽い腕部の体圧が分散され、蓐瘡予防に効果的である。
更に、マットレスのカバーとして、伸縮性のあるストレッチ素材を使用すると本発明のマットレスの効果がより発揮される。
In the above configuration example, the example of using foam urethane foam as backing surface layer 4, instead of the foam urethane foam, to use a soft urethane foam of about Hardness 30~70N Even in this case, the body pressure of the arm part with a relatively light load is dispersed, which is effective in preventing pressure ulcers.
Furthermore, when the stretch material with elasticity is used as the cover of the mattress, the effect of the mattress of the present invention is more exhibited.
ウレタンフォーム製の下面層の表面側にウレタンフォーム製の表面層が積層されるマットレス芯材において、下面層のうち、人体の腰部付近を支持する部分を所定硬さとし、その上に、低反発ウレタンフォームからなる薄肉の表面層を積層することで、特に腕の動作が不自由な寝たきり者等にとって、腰部付近の沈み込み抑制と体圧分散のみならず、腕部を含んだ体全体の体圧分散効果が得られる。
また、下面層を、硬さの異なる頭部・胸部部分、腰部部分、脚部部分に分割することで、体全体をバランス良く支持できるようになり、また、下面層の裏面側に表面層とは厚みの異なるソフトウレタンフォームからなる裏面層を積層して三層構造にすることで、体格や体重等が異なる人がマットレスを裏返して使用して蓐瘡予防を図ることができる。
In a mattress core material in which a urethane foam surface layer is laminated on the surface side of a urethane foam bottom surface layer, a portion of the lower surface layer that supports the vicinity of the waist of the human body has a predetermined hardness, and a low-resilience urethane by laminating the surface layer of the thin-walled made of forms, especially for arm operation Disabled bedridden person or the like, not only the sinking suppression and pressure dispersion around the waist, including the arms body entire body A pressure dispersion effect is obtained.
In addition, by dividing the lower layer into a head / chest part, waist part, and leg part having different hardness, the whole body can be supported in a well-balanced manner, and the surface layer is provided on the back side of the lower layer. than be a three-layer structure of the back surface layer was laminated a heterogeneous of Rusofu bets urethane foam thickness, physique and body weight and the like are different people can be achieved Jokuso prevented using Flip the mattress.
１…マットレス芯材、２…下面層、２ａ…頭部・胸部部分、２ｂ…腰部部分、２ｃ…脚部部分、３…表面層、４…裏面層。
DESCRIPTION OF SYMBOLS 1 ... Mattress core material, 2 ... Lower surface layer, 2a ... Head / chest part, 2b ... Lumbar part, 2c ... Leg part, 3 ... Surface layer, 4 ... Back surface layer.
Claims (1)
A mattress having a mattress core material made of urethane foam consisting of at least a surface layer laminated on the front surface side, a lower layer laminated on the lower surface side, and a back layer laminated on the back surface side of the lower surface layer, The surface layer is made of a low-resilience urethane foam having a thickness of 10 to 30 mm and a rebound resilience of 1 to 20%, and the bottom layer has a thickness of 40 to 120 mm and a hardness of 100 to 300 N. It consists of at least three parts: a part that supports the head and chest, a part that supports the waist, and a part that supports the leg, and the part that supports the waist is the part and leg that support the head and chest. The back layer is made of a soft urethane foam having a hardness of 30 to 70 N and has a thickness of 10 to 30 mm and a thickness different from that of the surface layer. And mattress.
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| JP2003351446A JP4577870B2 (en) | 2003-10-10 | 2003-10-10 | mattress |
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| JP4577870B2 true JP4577870B2 (en) | 2010-11-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11471025B2 (en) * | 2017-09-28 | 2022-10-18 | Koninklijke Philips N.V. | Optical connection device and method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6379964B2 (en) * | 2014-10-09 | 2018-08-29 | アイシン精機株式会社 | mattress |
| JP6165799B2 (en) * | 2015-05-25 | 2017-07-19 | 株式会社ブリヂストン | Cushion material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11113688A (en) * | 1997-10-14 | 1999-04-27 | Achilles Corp | Mattress for bedding |
| JP2000005244A (en) * | 1998-06-22 | 2000-01-11 | Bridgestone Kaseihin Chubu Kk | Cushion material |
| JP2002238708A (en) * | 2001-02-20 | 2002-08-27 | Sumitomo Rubber Ind Ltd | Mattress |
| JP2002306283A (en) * | 2001-04-12 | 2002-10-22 | Bridgestone Corp | Cushion material |
| JP2003230462A (en) * | 2002-02-13 | 2003-08-19 | Dreambed Co Ltd | mattress |
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2003
- 2003-10-10 JP JP2003351446A patent/JP4577870B2/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11113688A (en) * | 1997-10-14 | 1999-04-27 | Achilles Corp | Mattress for bedding |
| JP2000005244A (en) * | 1998-06-22 | 2000-01-11 | Bridgestone Kaseihin Chubu Kk | Cushion material |
| JP2002238708A (en) * | 2001-02-20 | 2002-08-27 | Sumitomo Rubber Ind Ltd | Mattress |
| JP2002306283A (en) * | 2001-04-12 | 2002-10-22 | Bridgestone Corp | Cushion material |
| JP2003230462A (en) * | 2002-02-13 | 2003-08-19 | Dreambed Co Ltd | mattress |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11471025B2 (en) * | 2017-09-28 | 2022-10-18 | Koninklijke Philips N.V. | Optical connection device and method |
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| JP2005111100A (en) | 2005-04-28 |
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