Magnetic cushioning sheet

TECHNICAL FIELD

The present invention relates to a magnetic cushioning sheet for filling a mattress or a pillow for the purpose of promoting health.

BACKGROUND TECHNICS

In the past, as this kind of magnetic cushioning sheet, there was a sheet that has the structure of a cushioning material, such as flexible polyurethane foam, having a multiple number of permanent magnets strewn in alignment on its surface. On its continuous up-and-down level surface of said cushioning material, a multiple number of plugs are formed, and each permanent magnet is fixed with adhesives at the adjoining concave portion. This cushioning sheet is piled on a certain core material and its entire contour is covered with a cloth to form a mattress or a pillow.

These plugs in the above-mentioned cushioning sheet will form vacancies between the user's body and the pillow or a mattress by sustaining the body with their plugs, providing space for ventilation and dehumidification. At the same time, this aims to give some finger-pressing massaging effect.

However, these plugs tend to be squashed under the weight of body, and the finger-pressing massaging effect is hardly expectable. Also the effect of space for ventilation and consequently for dehumidification are difficult to obtain. An idea was therefore offered as the remedy. Impregnating rubber latex to the whole cushioning material and applying hardening process later was the idea. Such a cushioning material, if used in a mattress, would not be squashed under the weight of body to assure sufficient space for ventilation and dehumidification and finger-pressing effect is also expectable.

This kind of cushioning material is, if used as a mattress, will decrease cushioning effect to a large extent and obstructs sound sleeping. Moreover, there is a large vacant space between the user's body and the permanent magnets in the concave portion of the sheet, because the plugs will not follow the movement of the user's body with the results that the magnetic line of force will not effectively affect the body. It is, therefore, necessay to make the plug height low or use larger size permanent magents. However, such a remedy will give insufficient space for ventilation and weaken finger-pressing massaging effect. Large size permanent magnets will result in making the cushioning material too heavy.

The present invention was made with these problems in view and remedied to assure appropriate cushioning effect and making plugs feasible to follow the movement of body. Moreover, the invention purposes to offer a cushioning sheet having effectively affecting magnetic line of force to the user's body.

DISCLOSURE OF THE INVENTION

The magnetic cushioning sheet in accordance with this invention consists of a cushioning material in sheet form having a multiple number of plugs on the up-and-down level surface and a multiple number of permanent magnets that are fixed correspondingly in the concave portions between the plugs on the surface of the cushioning material. The entire body of above-mentioned cushioning material is hardened to a half way by impregnating with rubber latex and heating and then only the plugs are further hardened later to a higher degree in rigidity after impregnating rubber latex again.

According to the present invention, the entire cushioning material is processed to semi-hardening while all plugs are processed later to a higher degree of hardness. If weight is applied onto this cushioning material, its entire body will be compressed to be deformed in sustaining the load cushioningly. And all plugs will follow the movement of the user's body to give a comfortable feel for sleeping by dint of the cushioning effect of the sheet. Moreover, plugs will not be deformed under the weight, being depressed appropriately into the cushioning sheet to narrow the distances between the permanent magnets and the user's body, thus giving effective magnetic line of force to the body. Therefore, it is not required to lower the height of plugs nor to make the size of permanent magnets any larger.

This assures a good ventilation and finger-pressing massaging effect, and no inconvenience is accompanied for the cushioning material being too heavy.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective view of the mattress using the magnetic cushioning sheet according to the present invention with its portion broken away.

Fig. 2 is a cross-sectional view taken along the line II - II in Fig. 1.

Fig. 3 is a perspective view of a pillow using the magnetic cushioning sheet according to the present invention with its portion broken away.

Fig. 4 is a cross-sectional view taken along the line IV - IV in Fig. 3.

Fig. 5 is an enlarged sectional view of the magnetic cushioning sheet.

Fig. 6 is a schematic view showing the manufacturing method of the magnetic cushioning sheet.

PREFERRED EMBODIMENT OF THE INVENTION

Fig. 1 and 2 show the mattress A for health promotion wherein a corrugated sheet 1 made of synthetic resin such as polyvinyl chloride is placed as the middle layer, on which a magnetic cushioning sheet 2 and under which other cushioning sheets 3 are piled respectively, and these cushioning sheets 2 and 3 are enclosed in a covering cloth 4, with their peripheral vertical brims being pasted.

Above-mentioned cushioning sheet 2 is composed of a multiple number of plastic permanent magnets 5 and a cushioning sheet 7 having a multiple number of plugs 6 on its continuous up-and-down level surface. And those permanent magnets 5 are fixed with adhesives on the sheet surface of the cushioning material 7 at the concave portion 8 between adjoining plugs.

Above-mentioned cushioning material 7 made of flexible polyurethane foam of continuous pores is of half-way hardened quality having been hardened by impregnating with rubber latex to its entirety and the plugs 6 are processed to hardening later to a higher degree by impregnating rubber latex once again.

Fig. 5 shows the structure of the cushioning material 7 magnified, wherin numeral 11 indicates the first portion of whole polyurethane foam having been subjected to hardening process and numeral 12 shows the portion of plugs 6 only which is the second portion having been hardened further after being impregnated with rubber latex again. By conducting hardening processing two times, the second hardened portion 12 is harder than the first hardened portion 11.

Above-mentioned magnetic cushioning sheet 2 is manufactured by the method shown in Fig. 6.

In said figure, numeral 10 indicates a band-form sheet material of flexible polyurethane foam of continuous pores. This sheet material 10 is led to the first liquid tank 14 after being extruded via the guide roller 13. The liquid tank 14 is filled with rubber latex 15, which impregnates the sheet material 10 by passing under the impregnating roller 16. After this impregnating processing, the sheet material 10 is led to the squeezing rollers 18 and 19 via the guide roller 17. By passing through the squeezing rollers 18 and 19, the quantity of impregnation of rubber latex is controlled. By passing through the heating furnace 20, after the control of the quantity of impregnation of the rubber latex is made, the rubber latex is hardened to semi-rigid condition, which forms the above-mentioned first hardened portion 11. Numeral 21 in Fig. 6 is the tank for collecting the sqeezed rubber latex.

The sheet material 10 having finished this hardening process is led through the guide roller 22 into the second liquid tank 23. In the liquid tank 23, the rubber latex 24 is always filled to a certain constant level. When the sheet 10 passes under the impregnating roller 25, only the plugs and more particularly the entire plug bodies get impregnation of rubber latex. After this impregnating process, the sheet 10 is led to the heating furnace 27 via the guide roller 26. The rubber latex impregnated in each plug is hardened by heating further to a higher degree forming the second hardened portion 12.

Figs. 3 and 4 show the pillow B for health promoting purpose, which contains a core cushioning material 30 and tile-shaped porcelain plate 31 covered with the magnetic cushioning sheet 2 and its entire body is covered with cloth 32.

Above-mentioned magnetic cushioning sheet 2 has the same composition as the aforesaid mattress A which contains the same magnetic cushioning sheet 2, being composed of the cushioning material 7 and a multiple number of permanent magnets 5.

UTILITIES FOR APPLICATION TO INDUSTRIES

When a user lies on the mattress A of abovementioned construction, the cushioning material 7 being entirely formed in semi-rigid quality, it gives an appropriate cushioning effect to the body as the cushioning material 7 is depressed and deformed to suit to the contour of the body, and its plugs 6 press each part of the body in finger-pressing massaging manner with their higher rigidity. Even when the body moves on the mattress A, all plugs 6 will follow fittingly as the body moves, realizing to give comfortable feeling for sleeping. And each one of the plugs themselves will be barely deformed under the weight of body and sinks properly into the cushioning base material, which will result in narrowing the distances between the body and the permanent magnets 5 which are positioned in the dented portion of the cushioning material 7, giving effective magnetic line of force to the user. It is needless to say that the same effects are given as mentioned in the above when the head is rested on the pillow B.