Patent ID: 7568248

Claim:
A pillow including a bottom member and a head placement member disposed above the bottom member, comprising: a hollow portion formed in the head placement member designed so that when a head of a user is placed face-up on the head placement member, the head placement member is depressed by the load of the head so that the distance between the lowermost portion of the head on the head placement member and the bottom member is in the range of 10 mm to 30 mm; and a biasing mechanism disposed in the hollow portion so as to bias the head placement member upward; wherein the biasing mechanism comprises, provided the side on which a crown portion of the head of a user placed on the head placement member is referred to as a rear side and the side on which the neck of the user is placed is referred to as a front side, a pair of X-shaped links disposed laterally spaced apart in the hollow portion and each composed of a first link member slanted upward toward the front and a second link member slanted upward toward the rear which are connected pivotably via an intermediate pivotable connecting portion, a front-side upper connecting member for connecting front end portions of first link members of the pair of X-shaped links, a rear-side upper connecting member for connecting rear end portions of second link members of the pair of X-shaped links, and a spring member for providing a spring force for approximating the link members of each X-shaped link in the frontward/rearward direction along a line of action in the frontward/rearward direction with respect to the X-shaped link, so that the pair of X-shaped links are biased toward the upper expanding direction via the spring member, wherein said biasing mechanism is designed so that during depression of the head placement member, a vertical positional relationship between a line of action of the spring force of said spring member and said pivotable connecting portion of the link members of each of said X-shaped links is reversed, so that said X-shaped links are biased toward a lower contracting direction by said spring member, wherein the head placement member is formed of a molded member made of soft resin, and wherein plural communication holes for communicating the hollow portion with the exterior is formed on the upper area of the hollow portion of the head placement member, wherein air within the hollow portion is blown out to the exterior through said communication holes when the head placement member is depressed.