PROBLEM TO BE SOLVED: To provide a solution to a problem associated with a conventional chair with no headrest, which is a difficulty in retrofitting a headrest due to an original structure with no consideration for the retrofitting and/or insufficient dynamic strength involving concentration of load.SOLUTION: In order to avoid the structural fragility, that is, to obtain a headrest structure which is not excessively dependent on a strength of a frame or a backrest, the headrest is provided with an arrangement in which a load from a head is intentionally distributed to a fulcrum, a force point and an action point at appropriate intervals so as to reduce a load concentration to a chair structure as well as to simply achieve greater strength and stability than ever.SELECTED DRAWING: Figure 1
【課題】 従来の椅子でヘッドレストが無いものには、本来構造ならびに配慮無き構造ならびに荷重の集中などの力学上の強度から、後からヘッドレストを追加・付加し辛かった。【解決手段】 前記構造的脆弱性、すなわちヘッドレストにおいて椅子のフレームや背もたれの強度へ過渡に依存しない構造を得るには、頭部からの荷重を支点、力点、作用点を適宜な間隔で設けることで意図的に分散させ、椅子の構造体への負荷を軽減すると伴に、従来以上の強度と安定性を簡易に達成する事が出来る。【選択図】図1
SIMPLE HEADREST FOR CHAIR
椅子の簡易ヘッドレスト
2016-12-28
Patent
Elektronische Ressource
Japanisch
IPC: | B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet / A47C Stühle , CHAIRS / A61H PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY , Geräte für die physikalische Therapie, z.B. Vorrichtungen zum Lokalisieren oder Anregen spezieller Reflexpunkte am Körper |