A kind of Improvement type connection fastener (one), structure includeHave: a fastener body and a movable bolt,The fastener body middle section utilizes the pivot ear of rivet combining movement bolt,Swing movable bolt can in fastener body middle section,And be able to swing by the helical spring at movable bolt center and homing,Its movable bolt includes: a tightening latch,One pushing block,One helical spring and a returning spring and a capping,Its returning spring, which can push pushing block, holds mandril top in what inverted draw cut,Inhibit the oscillating stroke of tightening latch,It is stuck that bar oscillating stroke will be fastened,Tightening latch can not be swung to form opening retaining ring is allowed to loosen catching groove,Make retaining ring on Pet neck ring is firm to be located in catching groove,Wander away or hurt sb.'s feelings come the pet disengaging control for avoiding carrying outgoing,Or accident phenomenon occurs,The pushing block needs continuous action Hou,Hou is pushed up to push inwardly again,Mandril front side is allowed to go deep into deep gouge,Increase the oscillating stroke of tightening latch,Can make tightening latch swing to be formed opening allow retaining ring be detached from catching groove,Using its continuous action characteristic,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(一)，其結構包含有：一扣具本體及一活動栓，該扣具本體中段處利用鉚釘結合活動栓之樞耳，使活動栓可在扣具本體中段處擺動，並藉由活動栓中心處之螺旋彈簧得以擺動及回復原位，其活動栓包含有：一栓桿、一推塊、一螺旋彈簧及一回復彈簧及一封蓋，其回復彈簧可推擠推塊使頂桿頂持於頂槽內，抑制栓桿之擺動行程，將拴桿擺動行程卡死，讓栓桿無法擺動形成開口讓扣環鬆脫扣槽，使寵物項圈上扣環穩固的扣設在扣槽內，來避免攜帶外出之寵物脫離控制而走失或傷人、或發生事故現象，該推塊需連續動作後，向上推動後再向內側下壓，讓頂桿前側深入沉槽，增加栓桿的擺動行程，方可使栓桿擺動形成開口讓扣環脫離扣槽，利用其連續動作特性，可避免因寵物躁動時扣環左右移動擠壓到推塊，造成因寵物躁動掙扎扣環脫離扣槽，而使寵物發生上述的情形。
