Adjustable folding chair for extended periods of seating

摘要

An adjustable folding chair is configured to include a central chair portion defining a pair of seat back mounting sections, a pair of front leg mounting sections, a pair of rear leg mounting sections, and a seat surface. A seat back is mounted on the seat back mounting sections for vertical movement to position the seat back at a desired position above the seat. Front and rear leg extensions are mounted on the front and rear leg mounting sections for vertical movement. A locking mechanism is housed in a horizontal strut in the front and rear leg extensions to control the positioning thereof. The locking mechanism includes a pair of opposing spring-biased locking pins and an actuator connected thereto that projects from the strut for engagement by the user. Such a chair construction permits the seat surface to be oriented in a plurality of discrete positions for comfortable utilization.

主权项

1. A chair adapted to provide comfort during prolonged seating periods and facilitating proper sitting posture comprising:
a central chair portion including an outer frame member having a first dimension and inner frame members defining a pair of seat back mounting sections extending upwardly from said outer frame member, a pair of front leg mounting sections extending downwardly from said outer frame member, a pair of rear leg mounting sections extending downwardly from said outer frame member, and a seat member pivotally connected to said outer frame member, said inner frame members having a second dimension smaller than said first dimension, said seat member being positioned such that each of said seat back mounting sections, said front leg mounting sections and said rear leg mounting sections are located laterally outboard of said seat member; a seat back including a pair of seat back extensions, each of the seat back extensions being telescopically mounted on one of the seat back mounting sections for vertical movement of said seat back relative to said seat member, said seat back extensions having said first dimension so that said seat back extensions can align with corresponding portions of said outer frame member when mounted on said seat back mounting sections; a front leg assembly having a support strut rigidly fixed to a pair of front leg extensions telescopically mounted on the front leg mounting sections of the central chair portion to permit a height adjustment of a front edge of said seat member, said front leg extensions having said first dimension so that said front leg extensions can align with corresponding portions of said outer frame member when mounted on said front leg mounting sections; a rear leg assembly having a support strut rigidly fixed to a pair of rear leg extensions telescopically mounted on the rear leg mounting sections of the central chair portion to permit a height adjustment of a rear edge of said seat member independently of said front edge to create a selected orientation of said seat surface, said rear leg extensions having said first dimension so that said rear leg extensions can align with corresponding portions of said outer frame member when mounted on said rear leg mounting sections; a front locking mechanism mounted on said front leg assembly and including a front actuator operably associated with both said front leg extensions for locking the selected telescopic extension of said front leg assembly, and a rear locking mechanism mounted on said rear leg assembly and including a rear actuator operably associated with both said rear leg extensions for locking the selected telescopic extension of said rear leg assembly, wherein the seat back extensions, the front leg extensions, and the rear leg extensions are all telescopically adjustable relative to the seat member and selectively lockable in any of a plurality of discrete positions with respect to the seat member.