A kind of Improvement type links fastener, and structure includes: a fastener body andOne pushes bolt group,The fastener body middle section combines the pivot ear of pressing bolt group using rivet,Swing pressing bolt group can in fastener body middle section,And be able to swing by the helical spring at pressing bolt group center and homing,It presses bolt group: a tightening latch,One pushing block,One helical spring and a returning spring,It is equipped with room at the tightening latch center and accommodates pushing block and returning spring,Tightening latch bottom side is equipped with pivot ear,Helical spring is equipped at pivot ear center,Sliding block is equipped on front side of the pushing block,Sliding block top side is equipped with round bar and wears returning spring,Sliding block bottom side is equipped with a fixed pin and plugs fixation hole in what fastener body,Make its pushing block restricted what fixation hole when not pushed by external force,Tightening latch can not be swung to form opening and loosen retaining ring,It is detached from retaining ring on fastener body and Pet neck ring,Cause to carry pet disengaging control when pet is gone out and wander away or hurt sb.'s feelings,Or accident phenomenon occurs,The pushing block of this creation needs continuous action to push up Hou to push inwardly again,Can make tightening latch swing to be formed opening allow retaining ring be detached from catching groove,It can avoid because retaining ring moves left and right and is expressed to pushing block when pet is restless,It causes to be detached from catching groove because of the restless struggle retaining ring of pet,And make pet that above-mentioned situation occur.一種改良式連結扣具，其結構包含有：一扣具本體及一推壓栓組，該扣具本體中段處利用鉚釘結合按壓栓組之樞耳，使按壓栓組可在扣具本體中段處擺動，並藉由按壓栓組中心處之螺旋彈簧得以擺動及回復原位，其按壓栓組包含有：一栓桿、一推塊、一螺旋彈簧及一回復彈簧，該栓桿中心處設有容室容納推塊及回復彈簧，栓桿底側設有樞耳，樞耳中心處設有螺旋彈簧，該推塊前側設有滑塊，滑塊頂側設有圓桿穿設回復彈簧，滑塊底側設有一固定銷插設於扣具本體上固定孔，使其推塊未受外力推擠時受制於固定孔，讓栓桿無法擺動形成開口使扣環鬆脫，使扣具本體與寵物項圈上扣環脫離，造成攜帶寵物外出時
