Armrest adjustment member

Abstract

An armrest adjustment member including an armrest support, an outer sleeve, a positioning rod, a positioning part and an armrest body is revealed. The armrest support is disposed with a guide slot and symmetrical toothed bars on inner surfaces of the guide slot. The outer sleeve with an opening on one side is mounted on an upper part of the armrest support. The opening is mounted with a button. The T-shaped positioning rod arranged in the outer sleeve includes two top ends pivoted to the outer sleeve and a bottom end locked into a toothed groove of the toothed bar moveably. The bottom end is released from the toothed groove by pressing the button. The positioning part is disposed above the outer sleeve and is mounted between an armrest pad and an armrest base of the armrest body. Thus the armrest is adjusted horizontally, vertically or rotated.

1 . A multifunctional armrest adjustment member comprising:
 an armrest support disposed with a vertical guide slot on an upper part thereof while a lower part of the armrest support is connected to a left side or right side of a seat; two symmetrical toothed bars are respectively arranged at each of two corresponding inner surfaces of the guide slot and the toothed bar having a plurality of toothed grooves arranged from top to bottom;   an outer sleeve disposed around the upper part of the armrest support and having a top plate with a post, two corresponding limit slots, and an opening; the top plate is arranged at top of the outer sleeve and the post is on a top surface of the top plate; the two corresponding limit slots are mounted on an inner wall of a top end of the outer sleeve; the opening for mounting a button is on one side of the outer sleeve;   a positioning rod whose top ends thereof are pivoted to the limit slots of the out sleeve so as to form a pivot shaft while a bottom end of the positioning rod is a locking part locked into a toothed groove of the toothed bar moveably; a middle part of the positioning rod is locked with and connected to the button;   a positioning part fastened on the post of the top plate of the outer sleeve; and   an armrest body arranged on top of the outer sleeve and having an armrest pad and an armrest base; the armrest pad and the armrest base are pivoted to each other on a middle part thereof; a groove is disposed at an axis in a forward and backward direction of the armrest body and the post on the top plate of the outer sleeve passes through the groove to be fastened to the positioning part; thus the positioning part is moveably mounted between the armrest pad and the armrest base and the armrest body is able to be moved forward, and backward or rotated in relation to the positioning part;   wherein by pressing the button, the positioning rod is driven to rotate around the top end thereof that is pivoted to the limit slots of the out sleeve; thus the locking part on the bottom end of the positioning rod is released from one toothed groove of the toothed bar and the outer sleeve is moved upward in relation to the armrest support by the positioning part of the armrest body.   
     
     
         2 . The device as claimed in  claim 1 , wherein the button includes at least one fastening part while at least one bump corresponding to the fastening part is arranged at a middle part of the positioning rod and is fastened to the fastening part. 
     
     
         3 . The device as claimed in  claim 1 , wherein an elastic part is disposed over the locking part of the positioning rod so that the positioning rod is turned back to original position by an elastic force of the elastic part after being rotated. 
     
     
         4 . The device as claimed in  claim 3 , wherein the positioning rod is arranged with position holes for mounting the elastic part. 
     
     
         5 . The device as claimed in  claim 1 , wherein the positioning part is disposed with two symmetrical projecting curved parts while an inner surface of the armrest base is arranged with two curve areas corresponding to the two projecting curved parts of the positioning part so that the curve area is rotated in relation to the curved part. 
     
     
         6 . The device as claimed in  claim 1 , wherein a pivot part for pivoting and connection is arranged at a middle part of the armrest pad and a pivot part is disposed on a middle part of the armrest base so that the armrest pad is moved up and down in relation to the armrest base like a seesaw and the pivot parts act as a pivot shaft while applying pressure to a front end or a rear end of the armrest pad. 
     
     
         7 . The device as claimed in  claim 6 , wherein at least one end, a front end or a rear end, of both the armrest pad and the armrest base is disposed with at least one elastic part so that the armrest pad is turned back to original position by an elastic force of the elastic part after being released from the pressure applied. 
     
     
         8 . The device as claimed in  claim 1 , wherein the positioning part and the armrest base are respectively arranged with at least one bump and at least one grid groove; the bump is corresponding to the grid groove and is able to slide forward, backward and rotate in the grid groove. 
     
     
         9 . The device as claimed in  claim 8 , wherein the number of the bumps is two and the bumps are respectively disposed on a front end and a rear end of a bottom surface of the positioning part while the grid groove includes linear lines in a fore-and-aft direction and curved lines in a left-and-right direction. 
     
     
         10 . The device as claimed in  claim 8 , wherein the bump is disposed on a bottom surface of the positioning part elastically so as to contact against the grid groove of the armrest base elastically.