Patent ID: 6354664
Filing Date: 2002-03-12
Classification: A47C

Abstract:
A height adjusting device adapted to be mounted between a seat member and a backrest member of a chair, said backrest member extending in an upright direction, said height adjusting device comprising:a mounting frame including a proximate end portion adapted to be secured to the seat member, a distal end portion opposite to said proximate end portion in the upright direction and adapted to be disposed rearwardly of the backrest member, and an intermediate portion interposed between said proximate and distal end portions, said intermediate portion having front and rear intermediate wall surfaces opposite to each other in a first direction transverse to the upright direction, said rear intermediate wall surface including a plurality of retaining members spacedly displaced from one another in the upright direction; a sliding member adapted to be secured to the backrest member and including first front and rear major wall surfaces opposite to each other in the first transverse direction and mounted to be slidable relative to said intermediate portion of said mounting frame in the upright direction, said first front major wall surface being adapted to be spaced apart from the backrest member and disposed rearwardly of said rear intermediate wall surface, said first rear major wall surface including an upper portion which defines a passageway extending in the first transverse direction to be communicated with said first front major wall surface, and a lower portion extending from said upper portion in the upright direction; a lever member pivotally mounted on said lower portion of said first rear major wall surface of said sliding member at a fulcrum and about a pivotal axis which is transverse to both of the upright direction and the first transverse direction, said lever member including actuating and retained ends respectively at the opposite sides of said fulcrum and disposed such that said retained end is extendable through said passageway to be disposed forwardly of said first front major wall surface so as to be retained by one of said retaining members, when said actuating end is manually operated to turn said retained end about said pivotal axis; and a biasing member disposed to bias said retained end of said lever member to extend through said passageway so as to be retained by said one of said retaining members.