Puncture instrument
AssigneeTerumo Kabushiki Kaisha
InventorDaisuke Nishiuchi
Life of this patent
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Abstract
A puncture instrument includes a movable body movably disposed in a case, and a needle unit held by the movable body and having a needle. When a distal end face of the movable body is brought into abutment against a region to be punctured and the case is advanced toward the region to be punctured, the case is advanced together with the needle unit, and the tip end of the needle becomes protruded from the movable body and punctures the region to be punctured. An arm of the needle unit is abutted against and turned about a fulcrum member, thereby withdrawing the needle rearwardly.
Claims14
A puncture instrument comprising:
- a case;
- a needle movably disposed in the case and having a sharp needle tip;
- needle moving means for moving the needle toward a proximal end of the case;
- and
- an abutting member movably disposed in the case for abutment against the skin, the needle being movably held by the abutting member,
- wherein when the abutting member is moved toward the proximal end of the case, the needle tip is protruded from an end of the abutting member, and thereafter the needle is moved toward the proximal end to house the needle tip in the abutting member.
A puncture instrument comprising:
- a case;
- a needle assembly movably disposed in the case and comprising a needle having a sharp needle tip and a hub holding the needle;
- at least one arm having a first junction at one end thereof, joined to the hub by the first junction, and inclined from the first junction toward a proximal end of the case in an initial state;
- a support rod joined to the arm by a second junction at another end of the arm, extending from the second junction toward a distal end of the case, and having a distal end to be fixed to the case;
- and
- an abutting member movably disposed in the case, the needle assembly being movably held by the abutting member, the abutting member having an abutting portion for abutment against the skin, a distal end opening formed in the abutting portion 40a for protruding the needle tip therethrough, and a fulcrum member disposed on an opposite side to the distal end opening,
- wherein when the abutting member is moved toward the proximal end of the case, the needle tip is protruded from the distal end opening, and the fulcrum member abuts against the arm to cause the arm to turn about the fulcrum member, thereby causing the arm to be inclined from the first junction toward the distal end of the case, and thereby to move the needle assembly toward the proximal end of the case to house the needle tip in the abutting member.
A puncture instrument comprising:
- a case;
- a needle assembly movably disposed in the case and comprising a needle having a sharp needle tip and a hub holding the needle;
- an abutting member movably disposed in the case, the needle assembly being movably held by the abutting member, the abutting member having an abutting portion for abutment against the skin, and a distal end opening formed in the abutting portion for protruding the needle tip therethrough;
- a resilient member disposed between the needle assembly and the abutting member in the case, for biasing the needle assembly toward a proximal end of the case;
- and
- a releasing mechanism for releasing the needle assembly from a non-displaceable state in which the needle assembly is not displaceable toward the proximal end,
- wherein when the abutting member is moved toward the proximal end, the needle tip is protruded from the distal end opening and the abutting member causes the releasing mechanism to release the needle assembly from the non-displaceable state, for thereby moving the needle assembly toward the proximal end under the resiliency of the resilient member.
Dependencies are inferred from the claim text.