公开(公告)号：US20060084914A1

公开(公告)日：2006-04-20

申请号：US10885792

申请日：2004-07-08

申请人： Chung-Hao Tung

发明人： Chung-Hao Tung

IPC分类号： A61M5/00 ,  A61M5/32

CPC分类号： A61M5/508 ,  A61M5/3234 ,  A61M2005/3241 ,  A61M2005/3242

摘要： The safe syringe comprises a cylinder, a needle seat and a pusher plunger. The needle seat is firmly connected to the front inner side of the cylinder, the needle seat has on its bottom a first protruding piercing portion, a chamber with a positive pressure is formed between the bottom of the needle seat and the front end of the cylinder; the pusher plunger is a hollow rod having a chamber therein with a negative pressure, the rod has a second piercing portion on the outer wall on its front end, and a piston envelops the front surface of the rod and the outer wall. Thereby, when the plunger is pushed to the front end of the cylinder, the first piercing portion pierces and breaks the piston and the front surface of the rod, the second piercing portion pierces forwards through and cut out the bottom of the needle seat to make communication of the two chambers, thus the bottom of the needle seat is drawn into the plunger together with the needle by changing of pressure.

摘要翻译： 安全注射器包括气缸，针座和推杆柱塞。 针座牢固地连接到气缸的前内侧，针座在其底部具有第一突出的穿刺部分，在针座的底部和气缸的前端之间形成具有正压力的腔室 ; 推杆柱塞是具有负压的室中空杆，杆在其前端的外壁上具有第二穿孔部分，活塞包围杆的前表面和外壁。 因此，当柱塞被推到缸的前端时，第一穿刺部分刺穿并破坏活塞和杆的前表面，第二穿刺部分穿过并切出针座的底部， 两个腔室的连通，因此通过改变压力将针座的底部与针头一起拉入柱塞。

公开(公告)号：US20070250004A1

公开(公告)日：2007-10-25

申请号：US11736864

申请日：2007-04-18

申请人： Chung-Hao Tung

发明人： Chung-Hao Tung

IPC分类号： A61M5/32

CPC分类号： A61M5/3234 ,  A61M5/508 ,  A61M2005/3231 ,  A61M2005/3241 ,  A61M2005/3242

摘要： A safe syringe with automatically retractable needle comprises a cylinder with a holding portion, a needle seat which is fixed within the front end of the cylinder via the holding portion and has a needle holder centrally and a plurality of ribs laterally, and a pusher plunger having a chamber with negative pressure and a constricted opening on the front end thereof. On the edge of the constricted opening is formed a cutting part. And a piston is provided to cover the opening of the pusher plunger. When the pusher plunger is pushed toward the front end of the cylinder, the piston will be cut out and the holding portion will be compressed and deformed to release the needle seat so that the chamber with negative pressure communicates with outside and the detached needle seat can be drawn into the plunger together with a needle by the pressure difference.

摘要翻译： 具有自动伸缩针的安全注射器包括具有保持部的气缸，经由保持部固定在气缸的前端内的针座，中心具有针保持架，横向具有多个肋，推杆柱塞具有 具有负压的室和在其前端的收缩开口。 在收缩开口的边缘上形成切割部分。 并且设置活塞以覆盖推动器柱塞的开口。 当推杆柱塞被推向气缸的前端时，活塞将被切出并且保持部分将被压缩和变形以释放针座，使得负压室与外部连通并且分离的针座可以 通过压力差与针一起被吸入柱塞。