The utility model relates to a continuous locking type self-breaking screw plug locking screw, which relates to the field of self-breaking screw plug locking screw in medical devices. A locking rod is provided with a locking rod, a holding cavity running through the upper and lower parts of the locking rod, a plug interface matching with a self-breaking tail cap at the lower end of the locking rod, a spring insertion groove on the side wall of the locking rod at the screw interface, and a clamping spring insert in the spring insertion groove. The end of the connecting rod is provided with a connecting rod, and the lower end of the connecting rod is provided with a tail cap slideway connected with the accommodation chamber. On one side of the connecting rod is provided with a tail cap outlet connecting the tail cap slideway and the outer end of the connecting rod; and the upper end of the connecting rod is provided with a wrench joint. The utility model has the advantages of simple structure and convenient use, and can cooperate with the existing torque limiting wrench, ratchet wrench and other force applicators to use and operate time-saving and labor-saving.
【技术实现步骤摘要】
一种连续锁紧式自断螺塞锁紧起子
本技术涉及医疗器械中自断螺塞锁紧起子领域,详细讲是一种结构简单,使用方便,能够配合现有的限扭矩扳手、棘轮扳手等施力器械使用、操作省时省力连续锁紧式自断螺塞锁紧起子。
技术介绍
我们知道,椎弓根螺钉是治疗脊柱疾病的常用内固定器械,其主要原理是将螺钉沿合适的钉道植入椎体内,再将连接棒放入螺钉的钉槽中,然后用螺塞将连接棒锁紧,从而将对应的椎体固定。将螺塞锁紧的扭矩,过大容易损坏螺钉,过小则容易在术后发生螺钉松动,为了在术中施加精确的扭矩,现有的方法是采用自断螺塞,自断螺塞如图1所示,包括螺塞本体3和自断尾帽1,自断尾帽1和螺塞本体3之间设有自断槽2,自断槽2的深度在生产中可以精确控制,自断尾帽上设有内六角或者内梅花等标准或非标准螺塞接头,锁紧起子头部设有内六角或者内梅花等标准或非标准螺塞接口,通过锁紧起子与自断尾帽配合连接,将自断螺塞旋入钉座U形槽中锁紧连接棒,当扭矩达到自断螺塞设定的扭矩时,自断槽处的材料发生剪切破坏,这样自断尾帽就和螺塞分离,并将连接棒锁紧。目前手术中常用的自断螺塞锁紧起子,主要有三部分组成,头部、杆部以及手柄。头部设 ...
【技术保护点】
1.一种连续锁紧式自断螺塞锁紧起子,设有锁紧杆,锁紧杆内设有上下贯通的容置腔,锁紧杆下端设有与自断尾帽配合连接的螺塞接口,螺塞接口处的锁紧杆侧壁上设有弹片安装槽口,弹片安装槽口内设有夹持弹片;其特征在于所述的锁紧杆上端设有连杆,连杆内设有下端与容置腔连通的尾帽滑道,连杆一侧上设有将尾帽滑道和连杆外部连通的尾帽出口;连杆上端设有扳手接头。
【技术特征摘要】
1.一种连续锁紧式自断螺塞锁紧起子,设有锁紧杆,锁紧杆内设有上下贯通的容置腔,锁紧杆下端设有与自断尾帽配合连接的螺塞接口,螺塞接口处的锁紧杆侧壁上设有弹片安装槽口,弹片安装槽口内设有夹持弹片;其特征在于所述的锁紧杆上端设有连杆,连杆内设有下端与容置腔连通的尾帽滑道,连杆一侧上设有将尾帽滑道和连杆外部连通的尾帽出口;连杆上端设有扳手接头。2.根据权利要求1所述的连续锁紧式自断螺塞锁紧起子,其特征在于所述的锁紧杆上部或连杆下部上设有安装座,安装座的一侧上设有截断容置腔或尾帽滑道的格挡滑槽,格挡滑槽内设有格挡滑块,格挡滑块上设有上下贯通的连通孔,格挡滑块后侧与安装座间设有格挡压簧。3.根据权利要求2所述的连续锁紧式自断螺塞锁紧起子,其特征在于所述的安装座上与格...
【专利技术属性】
技术研发人员:邬春晖,田康勇,丛海宸,
申请(专利权)人:山东威高骨科材料股份有限公司,
类型:新型
国别省市:山东,37
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。