Headrest control device for a treatment chair
AssigneesKabushiki Kaisha Morita Seisakusho, Kazuyoshi Kaneko
InventorsKazuyoshi Kaneko, Katsumi Suzuki
Life of this patent
Estimating the term…
Abstract
A headrest control device for a treatment chair in which the headrest contains a linkage capable of raising and lowering a head supporting portion of the headrest in synchronized interlocking relationship with the tilting of the headrest. The device facilitates the bringing of the head supporting portion into firm contact with the rear neck region of the patient thereby making it possible for him to open his mouth in a natural posture when he undergoes oral treatment with the backrest of the treatment chair being held approximately horizontal and the headrest being slightly forwardly tilted.
Claims4
A headrest control device for a treatment chair of the type wherein a headrest having a head supporting portion above a headrest frame is tiltable forwardly and rearwardly and lockable with respect to a headrest support mounted to a backrest, said control device comprising:
- a tilting control device mounted to said headrest support for locking and unlocking the rearward tilting of said headrest with respect to said support,
- hinge means for permitting the opening and closing of said head supporting portion with respect to said headrest frame, and
- linkage means contained in said headrest and responsive to the tilting thereof for opening said head supporting portion as said headrest is caused to tilt forwardly and for closing said head supporting portion as said headrest is caused to tilt rearwardly.
Dependencies are inferred from the claim text.