Angle adjustable armrest assembly

Abstract

An armrest assembly includes an armrest support, a cover plate, a rotation plate, an armrest plate, a positioning block, and a locking barrel. Thus, the armrest plate is rotatable relative to the armrest support to change the angle between the armrest plate and the armrest support so as to change the horizontal swivel angle of the armrest assembly. In addition, the horizontal swivel angle of the armrest assembly is adjusted freely to fit the practical requirement of different users, thereby providing a comfortable sensation to the users.

1 . An armrest assembly, comprising: 
 an armrest support;    a cover plate mounted on a top of the armrest support and having a rear end provided with a positioning shaft;    a rotation plate rotatably mounted on the positioning shaft of the cover plate;    an armrest plate secured on the rotation plate to rotate relative to the armrest support;    a positioning block secured on the positioning shaft of the cover plate and having a periphery formed with a plurality of locking grooves;    a locking barrel secured on the rotation plate to rotate therewith and elastically engaged with the locking grooves of the positioning block to provide a positioning effect to the rotation plate when the armrest plate is rotatable relative to the armrest support.    
   
   
       2 . The armrest assembly in accordance with  claim 1 , wherein: 
 the rotation plate is an elongated plate rested on the cover plate and has a pivot hole pivotally mounted on the positioning shaft of the cover plate;    the positioning block is rested on the rotation plate axially and has a shaft hole secured on the positioning shaft of the cover plate;    the periphery of the positioning block has an arc-shaped face formed with the locking grooves;    the locking barrel is a housing to receive the positioning block;    the locking barrel is combined with the rotation plate co-axially;    the locking barrel has an inside formed with at least one receiving recess to receive at least one elastic locking mechanism including a locking tenon detachably locked in either one of the locking grooves of the positioning block, and an elastic member biased between the locking barrel and the locking tenon to push the locking tenon toward the locking grooves of the positioning block;    the armrest assembly further comprises a cover secured on the rear end of the cover plate to encompass the locking barrel;    the armrest plate is secured on a front end of the rotation plate and is rotatable relative to the cover to change an angle between the armrest plate and the cover.    
   
   
       3 . The armrest assembly in accordance with  claim 1 , wherein the rotation plate is formed with an arc-shaped guide slot, and the armrest assembly further comprises a guide pin secured in a front end of the cover plate and extended through the guide slot of the rotation plate, so that guide pin is limited to be slidable in the guide slot of the rotation plate when the rotation plate is rotatable relative to the armrest support to limit the rotation angle of the armrest plate.  
   
   
       4 . The armrest assembly in accordance with  claim 1 , wherein the rotation plate is formed with an arc-shaped guide slot having a side formed with a plurality of positioning grooves, and the armrest assembly further comprises an elastic positioning mechanism secured in a front end of the cover plate, extended through the guide slot of the rotation plate and detachably positioned in either one of the positioning grooves of the guide slot of the rotation plate to provide a temporary positioning effect to the rotation plate when the rotation plate is rotatable relative to the armrest support.  
   
   
       5 . The armrest assembly in accordance with  claim 1 , further comprising a pad mounted on a front end of the rotation plate and corresponding to the armrest plate.