Seat pad and seat pad manufacturing method

1 . A seat pad comprising:

a fitting member having a fitting portion comprising at least one convex portion and at least one concave portion; and

a fitted member having a fitted portion comprising at least one convex portion and at least one concave portion and configured to be fitted with the fitting portion,

wherein

the fitting member and the fitted member are each constituted of a porous structural body,

the porous structural body comprises a skeleton part made of a flexible resin or rubber and extending over almost entirety of the porous structural body, and

the skeleton part comprises:

a plurality of bone parts; and

a plurality of connection parts each configured to connect ends of the plurality of bone parts.

2 . The seat pad according to claim 1 , wherein the fitting portion and the fitted portion are disposed in a main pad portion of the seat pad.

3 . The seat pad according to claim 2 , wherein the fitting member and the fitted member face each other in a direction perpendicular to a thickness direction of the seat pad.

4 . The seat pad according to claim 2 , wherein in cross-section perpendicular to a facing direction of the fitting portion and the fitted portion, the fitting portion and the fitted portion extend over an entire length of the seat pad.

5 . The seat pad according to claim 2 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

widths of the plurality of the convex portions are not uniform.

6 . The seat pad according to claim 2 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

extension lengths of the plurality of the convex portions are not uniform.

7 . The seat pad according to claim 2 , wherein

among the bone parts constituting the fitting portion of the fitting member, each of bone parts configured to contact the fitted portion of the fitted member is thicker than each of bone parts constituting a portion of the fitting member other than the fitting portion, and

among the bone parts constituting the fitted portion of the fitted member, each of bone parts configured to contact the fitting portion of the fitting member is thicker than each of bone parts constituting a portion of the fitted member other than the fitted portion.

8 . The seat pad according to claim 1 , wherein the fitting member and the fitted member face each other in a direction perpendicular to a thickness direction of the seat pad.

9 . The seat pad according to claim 8 , wherein in cross-section perpendicular to a facing direction of the fitting portion and the fitted portion, the fitting portion and the fitted portion extend over an entire length of the seat pad.

10 . The seat pad according to claim 8 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

widths of the plurality of the convex portions are not uniform.

11 . The seat pad according to claim 8 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

extension lengths of the plurality of the convex portions are not uniform.

12 . The seat pad according to claim 1 , wherein in cross-section perpendicular to a facing direction of the fitting portion and the fitted portion, the fitting portion and the fitted portion extend over an entire length of the seat pad.

13 . The seat pad according to claim 12 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

extension lengths of the plurality of the convex portions are not uniform.

14 . The seat pad according to claim 1 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

widths of the plurality of the convex portions are not uniform.

15 . The seat pad according to claim 14 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

extension lengths of the plurality of the convex portions are not uniform.

16 . The seat pad according to claim 1 , wherein

at least one of the fitting portion and the fitted portion has a plurality of the convex portions, and

extension lengths of the plurality of the convex portions are not uniform.

17 . The seat pad according to claim 1 , wherein

among the bone parts constituting the fitting portion of the fitting member, each of bone parts configured to contact the fitted portion of the fitted member is thicker than each of bone parts constituting a portion of the fitting member other than the fitting portion, and

among the bone parts constituting the fitted portion of the fitted member, each of bone parts configured to contact the fitting portion of the fitting member is thicker than each of bone parts constituting a portion of the fitted member other than the fitted portion.

18 . The seat pad according to claim 1 , wherein the seat pad is a car seat pad.

19 . The seat pad according to claim 1 , wherein the fitting member and the fitted member are shaped by a 3D printer.

20 . A seat pad manufacturing method for manufacturing the seat pad according to claim 1 , the seat pad manufacturing method comprising:

shaping the fitting member and the fitted member using a 3D printer; and

fitting the fitting portion of the fitting member and the fitted portion of the fitted member with each other.

21 . The seat pad according to claim 1 , wherein

the skeleton part defines a plurality of cell holes within the porous structural body.