The invention relates to a safety type syringe comprises a needle tube, a piston and a needle head, the push rod in the silica gel, which is characterized in that the outer side of the needle tube is sleeved jacket, an outer thread and a retaining ring is arranged at the rear part of the rear part of the syringe is in turn, coat and internal thread matched with the external thread, the other is arranged between the outer end ring and ring connected with the outer sleeve by tearing the inner circumferential line, the pull ring is provided with a plurality of wedge block check, check the end wedge block check ring end face and away from the side of the top thread together. The front of the needle tube is provided with an annular limit groove corresponding to coat inner thread in front of the position of the circumference is provided with a plurality of tongue shaped spring the inside is provided with a tongue shaped spring, and an annular limit slot with the raised limit, the corresponding position of the front coat tongue shaped spring along the circumferential direction is provided with a through hole of symmetry. The utility model has the advantages of reliable use, not only avoiding the occurrence of the cross infection between the needle and the patient, but also convenient to split the needle and the needle tube.
【技术实现步骤摘要】
本专利技术涉及医疗器械,特别是一种安全型注射器。
技术介绍
现有的医用注射器由针管、内推杆、设于内推杆前端的硅胶活塞、设于针管前端的针头、设于针头外侧的护套组成。使用时,需将针头外侧的护套摘下,吸取药物并完成注射后,根据操作规范不能再将护套套于针头外侧,以避免刺伤手指造成感染。但针头裸露在外,对针头的处理工作带来诸多不便,而且通常情况是,护士在为病人完成注射后需要将带有针头的注射器带回到护士站统一回收,这期间存在安全隐患。
技术实现思路
本专利技术的目的是为了提供一种解决上述问题的使用可靠的安全型注射器,不仅避免了针头伤人及医患之间发生交叉感染的情况发生,而且也方便对针头和针管作拆分处理。本专利技术的技术方案是:一种安全型注射器,包括针管、内推杆、设于内推杆前端的硅胶活塞、设于针管前端的针头,其特征在于:所述针管外侧套装有外套,所述针管后部依次设有外螺纹和挡圈,所述外套后部设有与外螺纹配合的内螺纹,所述外套后端另设有拉环且所述拉环与外套之间利用撕裂线连接,所述拉环内侧沿周向设有多个楔形逆止块,所述楔形逆止块的逆止端面与挡圈的远离外螺纹侧的端面顶靠在一起,所述针管的前部设有环形限位槽,所述外套对应内螺纹前部的位置沿周向均匀设有多个舌形弹片,所述舌形弹片的内侧设有用于与环形限位槽配合的限位凸起,所述外套对应舌形弹片前部的位置沿周向对称设有通孔Ⅰ,当舌形弹片内侧的限位凸起卡入针管的环形限位槽时,所述通孔Ⅰ与针头的针柄位置相对应。上述的安全型注射器,所述外套前端设有供针头的针柄穿过的通孔Ⅱ。上述的安全型注射器,所述内螺纹前部的外套内周面与针管外周面贴合。本专利技术的 ...
【技术保护点】
一种安全型注射器,包括针管、内推杆、设于内推杆前端的硅胶活塞、设于针管前端的针头,其特征在于:所述针管外侧套装有外套,所述针管后部依次设有外螺纹和挡圈,所述外套后部设有与外螺纹配合的内螺纹,所述外套后端另设有拉环且所述拉环与外套之间利用撕裂线连接,所述拉环内侧沿周向设有多个楔形逆止块,所述楔形逆止块的逆止端面与挡圈的远离外螺纹侧的端面顶靠在一起,所述针管的前部设有环形限位槽,所述外套对应内螺纹前部的位置沿周向均匀设有多个舌形弹片,所述舌形弹片的内侧设有用于与环形限位槽配合的限位凸起,所述外套对应舌形弹片前部的位置沿周向对称设有通孔Ⅰ,当舌形弹片内侧的限位凸起卡入针管的环形限位槽时,所述通孔Ⅰ与针头的针柄位置相对应。
【技术特征摘要】
1.一种安全型注射器,包括针管、内推杆、设于内推杆前端的硅胶活塞、设于针管前端的针头,其特征在于:所述针管外侧套装有外套,所述针管后部依次设有外螺纹和挡圈,所述外套后部设有与外螺纹配合的内螺纹,所述外套后端另设有拉环且所述拉环与外套之间利用撕裂线连接,所述拉环内侧沿周向设有多个楔形逆止块,所述楔形逆止块的逆止端面与挡圈的远离外螺纹侧的端面顶靠在一起,所述针管的前部设有环形限位槽,所述外套对应内螺纹前部的...
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