Injection device

Injection device

  • CN 103,055,381 A
  • Filed: 06/23/2005
  • Published: 04/24/2013
  • Est. Priority Date: 06/23/2004
  • Status: Active Application
First Claim
Patent Images

1. injection device comprises:

  • Housing;

    Be connected at one end the syringe of entry needle, described syringe is slidably mounted in the described housing to move with respect to the primary importance of housing with between with respect to the second position of housing, state entry needle in described primary importance place and covered by described housing, state entry needle in described second position place outstanding from described housing;

    Stopper, it is slidably mounted in the described syringe and can moves and by described entry needle drain,The rod piston comprises;

    Upper solid section,Lower solid section, it has can be operated with mobile described stopper and with expulsion force and passes to an end of described stopper, andCentral part between upper solid section and lower solid section, described central part has raised areas, described raised areas is included between the upper solid section that is arranged on piston and the lower solid section and two flexible elbows on each side of the vertical slit that aligns with the longitudinal centre line of piston, wherein, when described raised areas is positioned at projection position, described flexible elbow is from described vertical slit to outer process so that the described raised areas of described piston has the first girth greater than the girth of described upper solid section or described lower solid section, and when described raised areas was positioned at punctured position, described flexible elbow inwardly shrank so that the described raised areas of described piston has second girth similar to the girth of described upper solid section and described lower solid section towards described vertical slit;

    AndDrive biasing member, be arranged on an end place of described housing and be operable as towards the other end of described housing and move described piston.

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