Patent ID: 7771375

Claim:
A cushion comprising: a resin body with a spring structure comprising a three-dimensional structure including voids at a predetermined bulk density, the three-dimensional structure being obtained by contacting, entwining, and gathering adjacent ones of random loops or curls of continuous filaments made from a thermoplastic resin in such a manner as to allow the resulting structure to have a layered structure in which layers composed of the filaments having high bulk density as superficial layers are formed on a front and rear of the resin body with the spring structure in a lengthwise direction and a layer composed of filaments having a low bulk density as a core layer is interposed between the superficial layers, wherein the resin body with the spring structure supports at least an upper half of a human body when using the cushion; and a speaker incorporated in the resin body with the spring structure or disposed on one of the superficial layers of the resin body with the spring structure, wherein each of the superficial layers has a bulk density of 0.2 to 0.5 g/cm 3 and a void ratio of 44 to 77%, and the core layer has a bulk density of 0.01 to 0.15 g/cm 3 and void ratio of 83 to 99%, a part of or all of the filaments composing the resin body with the spring structure are hollow, a diameter of the filaments composing the resin body with the spring structure is 0.3 to 3.0 mm when the filaments are solid, a diameter of the filaments constituting the resin body with a spring structure is 1.0 to 3.0 mm and a hollow ratio of the filament is 10 to 80% when the filaments are hollow, each of the filaments composing the resin body with the spring structure is functioned as a medium to conduct a wave to the human body, the wave for obtaining perception of sound or bodily sensation by vibration is conducted with each of the filaments composing the resin body with the spring structure as a media, and sonic wave without distortion is resonated on the superficial layers of the resin body with the spring structure.