Honeycomb-structured sitting cushion
The present invention relates to a honeycomb-structured sitting cushion comprising: a lower seat in which first through holes, which are vertical holes having a regular hexagonal cross-section, are formed and the first through holes, spaced at predetermined intervals from each other by first partitions, are consecutively formed in x-axial and y-axial directions; and an upper seat which is formed on the lower seat, and in which second through holes, which are vertical holes having a regular hexagonal cross-section larger than that of the first through holes, are formed, and the second through holes, spaced at predetermined intervals from each other by second partitions having a thickness (T 2 ) smaller than the thickness (T 1 ) of the first partitions, are consecutively formed in x-axial and y-axial directions, wherein the centers of the first through holes and the first partitions are aligned with the centers of the second through holes and the second partitions.
1. A honeycomb-structured seat cushion formed of a ductile resin or a ductile rubber, the seat cushion comprising:
a lower sheet comprising a first through-hole having a regular hexagonal cross-section, and perforated in an upper side and lower side direction, wherein the first through-hole is repeatedly formed in an x-axis direction and a y-axis direction and spaced apart by a first partition; and
an upper sheet formed on the lower sheet, comprising a second through-hole having a regular hexagonal cross-section larger than the regular hexagonal cross-section of the first through-hole, and perforated in the upper side and lower side direction, wherein the second through-hole is repeatedly formed in the x-axis direction and the y-axis direction and spaced apart by a second partition having a thickness less than a thickness of the first partition; and
a reinforcing rib spanning across an interior of either one or both of the first partition and the second partition, and disposed inside either one or both of the first through-hole and the second through-hole,
wherein centers of the first through-hole and the first partition are aligned with centers of the second through-hole and the second partition, respectively.
2. The honeycomb-structured seat cushion of claim 1 , wherein
each of the lower sheet and the upper sheet comprises a square shape, and
a sidewall is formed at sides of the lower sheet and the upper sheet.
3. The honeycomb-structured seat cushion of claim 1 , wherein either one or both of the upper sheet and the lower sheet decreases in thickness at an end portion to form an inclined surface.
4. A seat cushion, comprising:
a cushion element comprising a first surface and a second surface;
hexagonal holes passing through the first surface and the second surface; and
ribs formed within the hexagonal holes,
wherein the hexagonal holes are each of a same geometry, form a tessellating pattern with each other, are spaced apart from each other by a same distance, and each comprise a first portion extending through the first surface and into the cushion element, and a second portion steppedly extending from the first portion and through the second surface,
wherein a width of the first portion is greater than a width of the second portion, and
wherein the ribs are formed at a location at which the second portion steppedly extends from the first portion.