Armrest adjuster

An armrest adjuster disposed on a top of a vertical support of an armrest and used for adjustment of an armrest pad of the armrest comprising:

• a slider that is a long housing and having an enclosed wall therearound, a concave space formed in the enclosed wall, at least one hook projecting from an inner surface of a left side or a right side of the enclosed wall toward the concave space, a bottom surface thereof, two linear long grooves arranged at the bottom surface respectively, a notch set on either the left side or the right side of the enclosed wall, and at least one stopping rib that is projecting from the bottom surface, disposed on the bottom surface, and located closed to the notch;
• a fixing member that is a long plate mounted in the concave space of the slider, having a length shorter than a length of the slider and including a top surface, two long slots arranged at a left side and a right side of the top surface respectively for pressing the hook of the slider against the long slot and allowing the hook moveable in the long slot, a bottom surface thereof, two pins disposed on a front end and a rear end of the bottom surface of the fixing member respectively while each pin is mounted and slidable in the long groove of the slider correspondingly, two through holes each of which is set on the pin and used for fastening and fixing the fixing member on the top of the vertical support of the armrest, and at least one rack arranged at an edge of the bottom surface thereof and corresponding to the notch of the slider;
• and
• a button that is moveably mounted into the notch of the slider, clipped between the slider and the fixing member, and having a press portion exposed outside the notch for being pressed, a projecting portion integrally disposed on one side of the press portion and extended toward the concave space of the slider, a rack integrated on a top surface of the projecting portion and used for being engaged with or separated from the rack of the fixing member, and at least one elastic portion used for providing an elastic recovery force to the button being pressed;
• wherein the slider, the fixing member and the button are integrated into one part and connected firmly by the hook of the slider being pressed against the long slot of the fixing member when the fixing member is pressed by a force applied to be passed through the hook of the slider and mounted in the concave space of the slider;
• wherein the elastic portion is compressed and deformed elastically when the button is pressed and moved into the concave space of the slider so that rack of the button is moved away from the rack of the fixing member;
• thus the slider is able to be moved horizontally relative to the fixing member for adjustment of the armrest pad relative to the vertical support of the armrest;
• wherein the button is turned back by the elastic recovery force provided by the elastic portion so that the rack of the button is moved back and engaged to the rack of the fixing member again at a new position;
• now the slider is unable to be moved horizontally relative to the fixing member and the armrest pad is positioned at a new position after the adjustment of the armrest pad relative to the vertical support of the armrest.