Chair Position Adjuster

Abstract

The present invention relates to a chair position adjuster for adjustable chairs or foldable chairs. The objective of the utility model is to provide an improved chair position adjuster to overcome the shortcomings in the prior art, avoid risks of clamping hands, and realizing simple structure and lower cost. A chair position adjuster comprises a housing and an adjustment arm. The housing is installed at the lower surface of an armrest. The said adjustment arm is connected with a chair part. The said housing is internally provided with a continuous wave-shaped chute. The bottom of the said housing is transversely provided with a slit communicating with the said chute. One end of the adjustment arm is inserted into the said chute, while the other end extends out of the slit and is fixed on the chair part. The said adjustment arm moves slidably in the said chute.

1 . A chair position adjuster, comprising a housing and an adjustment arm, the said housing being installed at the lower surface of the armrest of a chair; the said adjustment arm being connected with a chair part, characterized in that the said housing is internally provided with a continuous wave-shaped chute; the bottom of the said housing is transversely provided with a slit communicating with the said chute; one end of the said adjustment arm is inserted into the said chute, while the other end extends out from the said slit and is fixed on the chair part; and the said adjustment arm moves slidably in the said chute. 
     
     
         2 . The chair position adjuster according to  claim 1 , wherein the said adjustment arm is shoe-shaped and wherein the said adjustment arm provided with a bolt at the end of the bent portion; the said adjustment arm moves slidably in the said wave-shaped chute through the said bolt; the other portion of the said adjustment arm extends out of the said chute from the said slit at the bottom and is connected with the chair part. 
     
     
         3 . The chair position adjuster according to  claim 1 , wherein the portion of the said adjustment arm extending out of the said housing is provided with mounting holes; the front leg pipes and the rear leg pipes of the chair are respectively rotatably connected to both the sides of the said adjustment arm through the mounting holes; and the rotation track plane of the front leg pipes is parallel to that of the rear leg pipes. 
     
     
         4 . The chair position adjuster according to  claim 1 , wherein the said housing comprises two parts, namely a left haft part and a right half part which fit with each other. 
     
     
         5 . The chair position adjuster according to  claim 1 , wherein each wave-shaped chute at least has three wave peaks. 
     
     
         6 . The chair position adjuster according to  claim 5 , wherein each wave-shaped chute has five wave peaks. 
     
     
         7 . The chair position adjuster according to  claim 1 , wherein the rear wall of the said housing is provided with an opening extending to communicate with the said slit at the bottom of the housing. 
     
     
         8 . The chair position adjuster according to  claim 1 , wherein the width of the said chute is a little greater than the thickness of the said adjustment arm. 
     
     
         9 . The chair position adjuster according to  claim 1 , wherein both the side walls of the said housing extend outwards from the top and form mounting faces for fixing the said housing at the lower surface of the armrest. 
     
     
         10 . The chair position adjuster according to  claim 9 , wherein the said mounting faces are provided with mounting holes. 
     
     
         11 . The chair position adjuster according to  claim 2 , wherein the portion of the said adjustment arm extending out of the said housing is provided with mounting holes; the front leg pipes and the rear leg pipes of the chair are respectively rotatably connected to both the sides of the said adjustment arm through the mounting holes; and the rotation track plane of the front leg pipes is parallel to that of the rear leg pipes. 
     
     
         12 . The chair position adjuster according to  claim 4 , wherein each wave-shaped chute at least has three wave peaks.