×

Puncture apparatus with automatic puncture function

  • US 9,155,526 B2
  • Filed: 08/29/2007
  • Issued: 10/13/2015
  • Est. Priority Date: 08/29/2007
  • Status: Active Grant
First Claim
Patent Images

1. A puncture apparatus with an automatic puncture function, comprising:

  • a hollow needle tube;

    a flexible sheath having the needle tube inserted therethrough;

    a main body having one of the ends of the sheath fixed thereto;

    a slider attached to one of the ends of the main body, the slider being capable of sliding in an axial direction relative to the main body, the slider being configured to be capable of adjusting a position of the needle tube relative to the sheath by sliding the slider relative to the main body,an engaging member having a portion for releasably engaging with a corresponding portion of the main body such that when the portion of the engaging member is engaged with the corresponding portion of the main body, relative movement between the slider and main body is restricted;

    a needle tube-maneuvering section, attached to one of the ends of the slider, capable of sliding in an axial direction relative to the slider, the needle tube-maneuvering section having a proximal end section of the needle tube fixed thereto;

    a retraction state-maintaining member for maintaining the needle tube-maneuvering section in a retracted state toward the proximal end section;

    an ejecting member provided in the needle tube-maneuvering section, an ejection force for projecting the needle tube-maneuvering section toward a distal end of the main body being accumulated in the needle tube-maneuvering section when the needle tube-maneuvering section is in the retracted state;

    an operation section engaged with the retraction state-maintaining member for releasing the ejection force when the operation section is released from engagement with the retraction state-maintaining member to project the needle tube-maneuvering section toward the distal end of the main body; and

    an unintentional operation preventive mechanism comprising a protection cover movable between a first position covering the operation section and a second position exposing the operation section, the unintentional operation preventive mechanism further having a protection cover motion restriction member engageable with the portion of the engaging member, wherein the unintentional operation preventive mechanism is configured such that it cannot be actuated to expose the operation section unless;

    the slider is moved relative to the main body to expose a distal end of the needle tube from the sheath; and

    the portion of the engaging member is engaged with the corresponding portion of the main body to restrict relative movement between the slider and the main body.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×