Patent Application
20240108149
The disclosure relates to the technical field of a cushion structure, in particular to an elastic cushion.
Existing seats or sofas are usually provided with cushions or back cushions with soft fillings such as foam and sponge, but after long-term use, the fillings may lose their elastic effect and collapse and deform after long-term extrusion. In addition, although the filling can add softness, it provides no buffering effect and is with a small rebound force, so it can't assist people in getting up. There are also some cushions or back cushions provided with springs. For example, a type of spring cushion is disclosed in a patent with a publication number of CN204378584U, which can realize rebounding by arranging felt, coconut palm, sponge and other fillings on the spring. However, the springs are prone to mutual interference, poor force dispersion, uneven stress on the cushions, and easy displacement of the spring after long-term use, which affects its resiliency. A spring cushion is disclosed in a patent with a publication number of CN211130429U, which includes a plurality of straight springs arranged side by side, and provides elastic support through inclined deformation of helical coils, but with a small deformation range and bearing capacity and a relatively high hardness, which is not suitable for sitting for a long time.
In view of above problems, the disclosure provides an elastic cushion with uniform stress, excellent comfort and a good rebound force.
Technical schemes adopted in the disclosure is as follows. An elastic cushion is provided in the disclosure, which includes a first elastic body, a second elastic body and a sleeve body. The second elastic body is embedded or fused in the first elastic body, and the sleeve body wraps outside the first elastic body. The second elastic body includes a wear resistant sleeve with a plurality of accommodating cavities and a plurality of elastic monomers arranged in the accommodating cavities in one-to-one correspondence. The plurality of accommodating cavities of the wear resistant sleeve are arranged independently of each other. Softness of the first elastomer is greater than that of the second elastomer, and elasticity of the second elastomer is greater than that of the first elastomer.
In the disclosure, the second elastic body with larger elasticity is wrapped by the first elastic body with larger softness, so that a part directly contacting with a human body is soft and comfortable to use. The elasticity of the second elastic body can serve to effectively support the human body, so that the elastic cushion is relatively small in whole deformation, thus avoiding a problem of extrusion deformation after long-term use. Moreover, due to the large elasticity of the second elastic body, it presents a large rebound effect on the human body, which can assist a person in standing up.
In addition, the elastic monomers in the second elastic body are not directly contacted with the first elastic body, but are separated by the wear resistant sleeve, which can effectively avoid a problem of abrasion after long-term contact between the elastic monomers and the first elastic body. The plurality of elastic monomers are distributed in the first elastic body, which can effectively disperse an acting force and make the elastic cushion be stressed more uniformly. Moreover, the plurality of elastic monomers are respectively loaded into an independent accommodating cavity, that is, the plurality of elastic monomers are independent of each other, and they may not touch and interfere with each other during use. Moreover, a space of the accommodating cavity is relatively small, which can limit a moving range of the elastic monomer, thus avoiding failure of the elastic structure caused by displacement or dumping of the elastic monomers, to a certain extent.
Optionally, compression of the elastic cushion is not more than 80%. The elastic cushion has strong elastic support, which can effectively assist the person in getting up. Moreover, the elastic cushion is small in compression, with a large overall load and long service life.
Optionally, elastic coefficient of each of the elastic monomer is equal, and all of the elastic monomers can be sequentially arranged in row, polygon, circle, etc., so that the elastic cushion can be stressed more uniformly.
Optionally, the elastic coefficient of each of the elastic monomers decreases gradually from bottom to top along its axial direction, that is, elastic coefficient of an upper section of the elastic monomer is smaller, elastic coefficient of a lower section of the elastic monomer is larger. The upper section is more flexible, so that when the elastic cushion deforms, the elastic cushion deforms according to the first spring and load bearing, and fit between the elastic cushion and a surface of the human body can be ensured; and the lower section is harder and can provide more stable support in use.
Optionally, the elastic coefficient of each of the elastic monomers is 50 to 750 N/m, and there are 200 to 800 elastic monomers per m2, and the elastic cushion can support a user of 30 to 120 kg. When the elastic coefficient and the density of the monomer are too small, an elastic supporting force is small, and it is easy to deform and fail after long-term use. When the elastic coefficient and the density of the monomer are too large, comfort in using may be affected. It can be adjusted according to the elastic coefficient and the density of the elastic monomer so as to compromise both elastic support and comfort.
Preferably, the elastic coefficient of each of the elastic monomers is 350 N/m, and there are 400 elastic monomers per m2, and optimal elastic support and comfort can be obtained. The elastic monomer is a single spring, and a radius and elastic coefficient of the spring are equal everywhere along its axial direction. Specifically, the elastic monomer is selected with a diameter of a quenched spring wire of 1.4 mm, a coil diameter of 4 cm, a height of the spring of 3 to 5 cm, and bearing capacity of a single spring of about 10N. The spring with this size and material, as a cushion filling material, can guarantee an enough supporting force and rebound force, and further a density of 400 springs per square meter also provide most comfortable and economical performance, which meets requirements of the cushion filling material.
Optionally, the elastic monomer includes two springs, a first spring and a second spring, sleeved from outside to inside, a radius and elastic coefficient of the first spring are equal everywhere along its axial direction, and a radius and elastic coefficient of the second spring gradually decrease from bottom to top along its axial direction. This structure is provided with two springs so as to effectively disperse an acting force, to be stressed more uniformly, to guarantee the service life of the elastic monomer, to keep the elasticity stable, and to bear repeated extreme impacts.
In addition, because the radii of the first spring and the second spring are different, the first spring and the second spring will not be entangled with or interfered to each other during expansion and contraction. Specifically, a rotation direction of the first spring and a rotation direction of the second spring are different, and the elastic coefficient of the second spring decreases gradually from bottom to top along its axial direction, which can provide both comfort and stability. Moreover, steel wire densities of an upper section and a lower section of the second spring are also different, that is, the lower section is relatively dense in wire and the upper section is relatively sparse in steel wire, which is different from a uniform steel wire density of the first spring, thus further avoiding mutual interference.
Optionally, the second elastic body further includes a guide for installing and guiding the elastic monomer, and the guide is arranged on an inner wall of the wear resistant sleeve corresponding to each of the accommodating cavities. The guide can prevent the elastic monomer from swinging in a left-right direction to a certain extent, and provide a stable supporting function for the elastic monomer.
Specifically, the guide includes a base and a guide pole. The base is round or oval, the guide pole is arranged on the base, the guide pole is tapered towards a free end thereof, the elastic monomer is sleeved on the guide pole, a height of the compressed elastic monomer is not less than a height of the guide pole, and after the elastic monomer is compressed, the guide may not affect comfort of the elastic cushion. In addition, the guide can lower a center of gravity and the elastic monomer is sleeved on the guide, so that the elastic monomer is not prone to toppling.
An end of the elastic monomer can be fixedly arranged on the guide, and the elastic monomer cannot fall out of the guide. The guide is an integrated structure with good integrity. The guide has a trumpet-shaped structure that tapers from bottom to top as a whole, and a side surface of the guide pole is a concave curved surface, which may not affect expansion and contraction of the elastic monomer and has a guiding effect on the expansion and contraction of the elastic monomer, making the expansion and contraction of the elastic monomer smooth. The guide can be made of polytetrafluoroethylene, which has excellent antifriction and lubrication performance, and the elastic monomer may not generate noise due to friction with the guide when it expands and contracts.
Optionally, the first elastomer is made of a foaming material, and the second elastomer and the first elastomer form an integrated structure by foaming. The second elastomer is placed in a middle of the mold while the first elastomer is foamed to be molded. After the foaming material is chemically reacted and molded in the mold, the first elastomer and the second elastomer are integrated, and the molded first elastomer can tightly wrap the second elastomer, thus with good integrity. However, it is not limited to this. The first elastic body can be cut into different shapes and thicknesses according to requirements, and then the second elastic body can be placed in the middle of the first elastic body, which is bonded and fixed by adhesive materials. Although operation processes may be added and waste in cutting materials will be caused, the first elastic body and the second elastic body can also be combined to compromise both comfort and the rebound force, which is not specifically limited in this disclosure.
A surface layer of the first elastomer can also be provided with fixed/detachable cooling gel or a heating sheet to meet use requirements for different climates in summer and winter.
Specifically, thickened non-woven fabrics can be adopted in the wear resistant sleeve, and the accommodating cavities in the wear resistant sleeve can be separated by ultrasonic welding technologies. A double-layer structure is adopted in a jacket, and an inner sleeve is a 100% polyester lined cloth sleeve, so as to facilitate replacement of an outer sleeve. The first elastic body is a sponge with high resiliency/low rebound, which is made of soft material and presents good comfort. A surface of the sponge can be molded or cut into an egg, a rectangle, a triangle, a wedge, etc. in shape.
An elastic cushion structure according to the disclosure is not only applicable for the cushion, but also can be used for a lumbar support, a headrest, a neck pillow, a back cushion, a floor cushion, a sofa cushion, a garden cushion, or serves as a pillow, a nap pillow, a wedge pillow, a triangle pillow, a leg pillow, a foot pillow, etc., or can also be used as a mattress, an outdoor cushion, a pet cushion, a bathroom cushion, as well as a rehabilitation mat for auxiliary nursing and a care mat for the elderly, and can also be applied to a pet nest, a pet sofa and a step surface of a pet stair, and this product has a wide application range.
The disclosure has following advantages. The first elastic body with large softness is configured to contact with the human body, thus providing comfortable use feeling. The middle of the first elastic body is internally provided with the second elastic body with large elasticity, which can provide better elastic support and compromise both comfort and the rebound force. The second elastic body comprises a plurality of elastic monomers, which can effectively disperse the acting force, with a more uniform stress. The first elastic body and the elastic monomers are separated by the wear resistant sleeve so as to avoid abrasion. Moreover, by dividing the wear resistant sleeve into a plurality of mutually independent accommodating cavities, mutual interference between the elastic monomers can be effectively avoided, and thus service life of the elastic cushion can be further ensured.
In the following, detailed and complete description of the present disclosure will be made in combination with specific embodiments with reference to the drawings.
Referring to
When the first elastic body 1 is foamed to be molded, the second elastic body 2 is placed into a mold as a whole, and the second elastic body 2 and the first elastic body 1 are fused into an integrated structure. Then, an inner sleeve 31 made of 100% polyester and an outer sleeve 32 made of polyester fiber are sequentially cladded outside the first elastic body 1 so as to obtain the elastic cushion.
The elastic cushion with a specification of 420 mm*420 mm*77.3 mm was tested for its compression resistance at a test speed of 100 mm/min. Specific results are shown in Table 1 below.
Referring to
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The above is only preferred embodiments of the present disclosure, which does not limit a protection scope of the present disclosure. Any equivalent structural transformation made with the specification and drawings of the present disclosure, which is directly or indirectly applied to other related technical fields, is included within the scope of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202222653175.5 | Sep 2022 | CN | national |
