The utility model relates to the technical field of medical devices, in particular to a spring nose drill knife, wherein the outer cutter base is fixedly arranged, and the outer cutter base is fixedly connected with the outer cutter; one end of the inner cutter base is a transmission connection end, and the inner cutter base is internally provided with an inner cutter base channel penetrating the inner cutter base along the axial direction, and the side of the inner cutter base channel close to the transmission connection end is provided with a limiting step surface; the inner cutter base channel is close to the transmission connection end The cutter cover is fixedly connected with an inner cutter, the inner cutter is located in the outer cutter; the inner cutter cover is fixedly connected with one end of the inner cutter base far away from the transmission connection end, and a spring cavity is formed between the inner cutter cover and the limiting step surface; the elastic part is located in the spring cavity; the moving separation part is arranged between the inner cutter cover and the outer cutter base. In the above structure, the internal cutter is always in the process of high-speed rotation, and the elastic force provided by the elastic part makes the internal cutter not contact with the external cutter in the axial direction, so as to avoid rigid wear. At the same time, the elastic force also increases the concentricity of the internal cutter and the external cutter during rotation.
【技术实现步骤摘要】
一种弹簧式鼻钻刀
本技术涉及医疗器械
,具体涉及一种弹簧式鼻钻刀。
技术介绍
鼻钻是一种在进行鼻手术时用于切除息肉或其它病变体的特制刀具,该种类型的鼻钻包括固定的外刀和在外刀内可旋转的内刀,内刀内部为与外界相通的通道,用于插装清洗用的水管、排出息肉等。其中内刀相对外刀旋转的同时,尤其在切除息肉或其它病变体的过程中,内刀还要相对外刀轴向移动。现有技术中的鼻钻结构,在内刀相对外刀旋转并轴向移动的过程中,同心度具有一定的误差,内刀与外刀之间为刚性接触,容易造成内刀和外刀磨损。
技术实现思路
本技术要解决的技术问题是解决现有技术中内刀相对外刀旋转并轴向移动的过程中,同心度不好导致刚性接触易造成磨损的技术缺陷。为了解决上述技术问题,本技术提供的技术方案如下:一种弹簧式鼻钻刀,至少包括:外刀座,所述外刀座固定设置,所述外刀座内固定连接有外刀;内刀座,所述内刀座的一端为传动连接端,所述内刀座内设有沿轴向贯穿内刀座的内刀座通道,所述内刀座通道靠近传动连接端的一侧设有限位台阶面;内刀盖,所述内刀盖内固定连接有内刀,所述内刀位于外刀内;所述内刀盖与内刀座远离传动连接端的一端固定连接,所述内刀盖与限位台阶面之间形成弹簧腔;弹性部件,所述弹性部件位于弹簧腔内;运动分离部件,所述运动分离部件设于内刀盖与外刀座之间。一种优选的实施例,所述弹性部件包括弹簧和顶圈,所述顶圈位于限位台阶面一侧。一种优选的实施例,所述运动分离部件为聚四氟乙烯的分离套圈,所述分离套 ...
【技术保护点】
1.一种弹簧式鼻钻刀,其特征在于,至少包括:/n外刀座,所述外刀座固定设置,所述外刀座内固定连接有外刀;/n内刀座,所述内刀座的一端为传动连接端,所述内刀座内设有沿轴向贯穿内刀座的内刀座通道,所述内刀座通道靠近传动连接端的一侧设有限位台阶面;/n内刀盖,所述内刀盖内固定连接有内刀,所述内刀位于外刀内;所述内刀盖与内刀座远离传动连接端的一端固定连接,所述内刀盖与限位台阶面之间形成弹簧腔;/n弹性部件,所述弹性部件位于弹簧腔内;/n运动分离部件,所述运动分离部件设于内刀盖与外刀座之间。/n
【技术特征摘要】
1.一种弹簧式鼻钻刀,其特征在于,至少包括:
外刀座,所述外刀座固定设置,所述外刀座内固定连接有外刀;
内刀座,所述内刀座的一端为传动连接端,所述内刀座内设有沿轴向贯穿内刀座的内刀座通道,所述内刀座通道靠近传动连接端的一侧设有限位台阶面;
内刀盖,所述内刀盖内固定连接有内刀,所述内刀位于外刀内;所述内刀盖与内刀座远离传动连接端的一端固定连接,所述内刀盖与限位台阶面之间形成弹簧腔;
弹性部件,所述弹性部件位于弹簧腔内;
运动分离部件,所述运动分离部件设于内刀盖与外刀座之间。
2.按照权利要求1所述的弹簧式鼻钻刀,其特征在于,所述弹性部件包括弹簧和顶圈,所述顶圈位于限位台阶面一侧。
3.按照权利要求1所述的弹簧式鼻钻刀,其特征在于,所述运动分离部件为聚四氟乙烯的分离套圈,所述分离套圈的外圈与外刀座连接,所述分离套圈的内圈与内刀盖连接。
4.按照权利要求3所述的弹簧式鼻钻刀...
【专利技术属性】
技术研发人员:姚拥军,洪启龙,方潇,姚彤,陈胜华,方国成,
申请(专利权)人:桐庐精锐医疗器械有限公司,
类型:新型
国别省市:浙江;33
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