Baby Bouncer with Adjustable Height Mechanism

Abstract

An adjustable infant chair includes a base, arm or middle frame, joined to the base and a seat rotatable joined to the arm or middle frame. The infant chair is adjustable up and down, relative to the base by increasing an angle between the arm and the base, while maintaining an angle between the seat and the base. Advantageously, in one form, the infant seat includes a bouncer or vibration mechanism.

What is claimed is: 
     
         1 . A height adjustable infant chair, said chair comprising:
 a base,   an arm rotatably joined to the base, and   a seat rotatably joined to the arm,   the adjustable infant chair being adjustable up and down, relative to the base by increasing an angle between the arm and the base while maintaining an angle between the seat and the base.   
     
     
         2 . The height adjustable infant chair of  claim 1 , wherein the arm is rotatably joined to the base at a first end of the arm and the seat is rotatably joined to the arm at a second end, opposite the first end of the arm. 
     
     
         3 . The height adjustable infant chair of  claim 1 , wherein the seat comprises a wire frame rotatably joined to the arm and a fabric material over the wire. 
     
     
         4 . The height adjustable infant chair of  claim 1 , further comprises a mechanism for applying vibration motion to the seat. 
     
     
         5 . The height adjustable infant chair of  claim 1 , further comprises a speaker for playing sounds. 
     
     
         6 . The height adjustable infant chair of  claim 1 , wherein the chair has a collapsed position in which the base and arm are substantially parallel to each other along respective longitudinal planes. 
     
     
         7 . The height adjustable infant chair of  claim 6 , wherein, in the collapsed position, the seat has its longitudinal plane which is substantially parallel to the longitudinal plane of the base. 
     
     
         8 . The height adjustable infant chair of  claim 1 , further comprising a knob rotatable to change an angle between the base and the arm, thereby causing the seat to be raised or lowered relative to the base. 
     
     
         9 . The height adjustable infant chair of  claim 8 , further comprising a rod, operatively associate with the knob, and operatively associated with a first linkage associated with the base and a second linkage associate with the seat, such that turning the knob, causing translational motion to the rod, resulting in the first linkage to rotate in one direction which simultaneously resulting in the second linkage to rotate in the opposite direction, thereby changing an angle between the arm and the base, and an angle between the arm and the seat, to thereby maintaining a constant angle of the seat relative to the base. 
     
     
         10 . The height adjustable infant chair of  claim 1 , further comprising an infant safety harness for holding an infant in the seat. 
     
     
         11 . A height adjustable infant chair, said chair comprising:
 a lower frame;   a middle frame having a first end and a second end, opposite, thereof, the first end rotatably joined to the lower frame;   an upper frame rotatably joined to the middle frame at the second end of the middle frame; and   a seat affixed to the upper frame,   wherein rotation of the middle frame, relative the lower frame in a first direction causes the upper frame to rotate, relative the middle frame in an opposite direction to that of the first direction, thereby keeping a relative angle position of the upper frame with the lower frame constant.   
     
     
         12 . The height adjustable infant chair of  claim 11 , wherein the lower frame has a front portion and rear portion, and the first end of the middle frame is rotatably joined to the rear portion of the lower frame. 
     
     
         13 . The height adjustable infant chair of  claim 12 , wherein the upper frame has a front portion, positioned over the front portion of the lower frame and the upper frame has a rear portion positioned over the rear portion of the lower frame. 
     
     
         14 . The height adjustable infant chair of  claim 1 , wherein the chair has a collapsed position in which the lower frame and middle frame are substantially parallel to each other along respective longitudinal planes. 
     
     
         15 . The height adjustable infant chair of  claim 14 , wherein, in the collapsed position, the upper frame has its longitudinal plane which is substantially parallel to the longitudinal plane of the base. 
     
     
         16 . The height adjustable infant chair of  claim 11 , further comprises a knob rotatable to change an angle between the lower frame and the middle frame, thereby causing the upper frame to be raised or lowered relative to the lower frame. 
     
     
         17 . The height adjustable infant chair of  claim 16 , further comprising a rod, operatively associate with the knob, and operatively associated with a first linkage associated with the lower frame and a second linkage associate with the upper frame, such that turning the knob, causing translational motion to the rod, resulting in the first linkage to rotate in the first direction which simultaneously resulting in the second linkage to rotate in the second direction which is opposite the first direction, thereby changing an angle between the middle frame and the lower frame the same amount as the angle changed between the middle frame and the upper frame, and thereby maintaining a constant angle of the upper frame relative to the lower frame. 
     
     
         18 . The height adjustable infant chair of  claim 11 , wherein seat comprises a fabric material affixed to the upper frame. 
     
     
         19 . The height adjustable infant chair of  claim 11 , further comprises a mechanism for applying vibration motion to the seat. 
     
     
         20 . The height adjustable infant chair of  claim 11 , further comprising an infant safety harness for holding an infant in the seat.