Seat core material

Patent metadata

Field	Value
Publication number	US-11224292-B2
Application number	US-201716474225-A
Country	US
Kind code	B2
Filing date	Dec 27, 2017
Priority date	Dec 28, 2016
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A seat core material having reduced deformation, extremely excellent dimensional accuracy, sense of unity, and strength is thus provided. The frame member and the foamed particle molding are integrated in the seat core material.

First claim

The invention claimed is:

1. A seat core material comprising:
a thermoplastic resin foamed particle molding and a frame member buried in a peripheral edge of the foamed particle molding,
wherein the frame member is an annular frame including a front frame part, a rear frame part, and two side frame parts that connect the front frame part and the rear frame part to each other,
the foamed particle molding includes one lengthwise side-to-side and only one slit that does not include plural slits, the side-to-side slit extending continuously from one end of the side-to-side slit at one of the side frame parts to another end of the side-to-side slit at another of the side frame parts over a width direction of the foamed particle molding between the side frame parts, the side-to-side slit penetrating the foamed particle molding from an upper surface to a lower surface,
an upper limit of a dimension of the side-to-side slit in the front-back direction is 60 mm,
a ratio of an opening area of the side-to-side slit to a projection area of the foamed particle molding in an upper surface view of the seat core material is 15% or less,
the foamed particle molding includes a connection in a part of the foamed particle molding laterally outside both ends of the side-to-side slit in the width direction, the side-to-side slit being not formed in the connection,
the connection is positioned in a range of the foamed particle molding from a central portion in a front-back direction to the rear frame part, and
a ratio (1/L) of a length (l) of the connection in a width direction to a length (L) of the foamed particle molding in the width direction at a portion where the connection is positioned is 0.02 to 0.2 on one side.

2. The seat core material according to claim 1 ,
wherein a penetration direction of the side-to-side slit is tilted relative to a vertical direction of the seat core material, wherein the frame defines a horizontal plane.

3. The seat core material according to claim 1 ,
wherein the foamed particle molding further includes a lengthwise front-to-rear slit along a side frame part at an adjacent position inside the side frame part, the front-to-rear slit from an upper surface of the foamed particle molding in a thickness direction of the foamed particle molding.

4. The seat core material according to claim 1 ,
wherein the side-to-side slit is linearly formed over a width direction of the seat core material.

5. The seat core material according to claim 1 ,
wherein the connection is formed in a portion of 60 to 80% from an end of the foamed particle molding on a front side.

6. The seat core material according to claim 1 ,
wherein the front frame part is buried biased to a lower-surface side of the seat core material.

7. The seat core material according to claim 1 ,
wherein the dimension of the side-to-side slit in the front-back direction is 5 to 50 mm.

8. The seat core material according to claim 1 ,
wherein the thermoplastic resin of the thermoplastic resin foamed particle molding is polyolefin resin.

9. The seat core material according to claim 1 ,
wherein an apparent density of the foamed particle molding is 0.015 to 0.3 g/cm 3 .

10. The seat core material according to claim 1 ,
wherein at least a portion of the annular frame is integrally buried in the foamed particle molding.

11. The seat core material according to claim 10 ,
wherein a length of an exposed part of the annular frame is equal to or less than 30% of an entire length of the annular frame.

12. The seat core material according to claim 1 ,
wherein the formation position of the connection is in front of a rising part on a rear side.

Assignees

• Jsp Corp

Inventors

• Hashimoto Keiichi
• HISAMATSU Katsunori
• Takayama Atsuo

Classifications

• A47C7/185 Primary

  with a stiff, rigid support · CPC title

• B60N2/7017

  characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for · CPC title

• B60N2/90

  Details or parts not otherwise provided for · CPC title

• B60N2/68

  Seat frames · CPC title

• A47C7/20

  with reinforcement {in the foam layer} · CPC title