To provide a chair whose backrest follows a posture of a seater and elastically deforms by a simple structure.SOLUTION: A backrest (a back plate) 2 is an integral mold product with synthetic resin as a material, is curved in a forward protruding shape with a lumbar support part as an apex (ridge line) in a lateral view, and curved in the way that it recesses nearer a user side as a whole in a planar view. Therefore, the backrest 2 is composed of an upper center area 21, an upper side area 22, a lower center area 23, and a lower center area 24, and adjacent areas are integrally linked via thinned belt-like hinge parts 25 to 28. A specific area can greatly rotate backward or torsionally deform by a seater's body pressure, so that it has excellent followability to a change of the seater's posture. As the whole is a single product, manufacturing costs can be suppressed and the quality can be stabilized.SELECTED DRAWING: Figure 3

    【課題】背もたれが着座者の姿勢に追従して弾性変形する椅子を、簡単な構造で提供する。【解決手段】背もたれ(背板)2は合成樹脂を素材にした一体成型品であり、側面視では、ランバーサポート部を頂点(稜線)として前向き凸状に曲がって、平面視では、全体として手前に凹むように曲がっている。従って、背もたれ2は、上センターエリア21と上サイドエリア22と下センターエリア23と下センターエリア24とで構成されており、隣り合ったエリアは、薄肉化された帯状のヒンジ部25〜28を介して一体に繋がっている。着座者の体圧によって特定エリアが後ろ側に大きく回動したりねじれ変形したりし得るため、着座者の姿勢変更に対する追従性に優れている。全体が単一品であるため、製造コストを抑制できるし、品質も安定化できる。【選択図】図3


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    Title :

    CHAIR


    Additional title:

    椅子


    Contributors:

    Publication date :

    2020-03-19


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    A47C Stühle , CHAIRS / B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet



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