초록 ▼

A chair seat tilt mechanism includes a main frame for mounting to a spindle, a seat plate to which a chair seat may be mounted, a back bracket to which a chair back may be mounted, and first link arms. The first link arms are pivotally mounted at one end to the main frame by way of a main frame pivo

A chair seat tilt mechanism includes a main frame for mounting to a spindle, a seat plate to which a chair seat may be mounted, a back bracket to which a chair back may be mounted, and first link arms. The first link arms are pivotally mounted at one end to the main frame by way of a main frame pivot and at another end to the rear of the seat plate by way of a rearward pivot. The back bracket is pivotally mounted near its front end to the main frame by way of a forward pivot and is further pivotally mounted to the seat plate at a medial pivot which is between the forward pivot and the rearward pivot. When assembled into a chair, if a chair occupant leans back against the chair back, the back bracket pivots about the forward pivot causing the medial pivot to move downwardly. This in turn causes the seat plate to pivot about the rearward pivot and results in a forward tilting of the chair seat. The first link arms may be capable of limited vertical translation such that when an overriding downward force is applied to the front of the chair seat, the seat plate pivots about the medial pivot to forwardly tilt the chair seat without backwardly tilting the chair back.

대표청구항 ▼

1. chair seat tilting mechanism, comprising:a main frame for mounting to a seat spindle; a seat plate pivotable with respect to said main frame about a rearward pivot, said rearward pivot having limited lateral translational freedom with respect to said main frame; a back bracket pivotable with resp

1. chair seat tilting mechanism, comprising:a main frame for mounting to a seat spindle; a seat plate pivotable with respect to said main frame about a rearward pivot, said rearward pivot having limited lateral translational freedom with respect to said main frame; a back bracket pivotable with respect to said main frame about a forward pivot; and a medial pivot pivotably connecting said seat plate to said back bracket, said medial pivot medially positioned between said rearward pivot and said forward pivot such that pivoting said back bracket about said forward pivot in one direction draws said medial pivot downwardly so as to tilt said seat plate forwardly.