Medical needle
AssigneeKawasumi Laboratories, Inc.
InventorYusuke Tamai
Life of this patent
Estimating the term…
Abstract
A medical needle includes a needle portion (10) having a needle tip on a distal end, a case (30) configured to be capable of accommodating the needle portion that can be exposed from the distal end side, a movement mechanism (50) for moving the needle portion inside the case, and a movement restricting portion (37) that restricts the needle tip accommodated in the case from moving in a direction opposite to a moving direction of the needle portion. The movement restricting portion maintains the needle tip accommodated in the case such that the needle tip can come into contact with an inner face of the case to restrict the movement of the needle tip in the opposite direction.
Claims7
A medical needle comprising:
- a needle portion having a needle tip on a distal end;
- a case configured to be capable of exposing the needle portion to a distal end side and accommodating the needle portion;
- a movement mechanism configured to move the needle portion inside the case until the needle tip protruding from the case is accommodated in the case, and including a fixation portion to which the needle portion is attached and an elastic member that energizes the fixation portion in a moving direction of the needle portion;
- and
- a movement restricting portion having an inclined plane that is inclined with respect to the moving direction and configured to restrict the needle tip accommodated in the case from moving in a direction opposite to the moving direction of the needle portion by the movement mechanism, wherein
- the movement restricting portion maintains the needle tip accommodated in the case such that the needle tip can come into contact with an inner face of the case, to restrict movement of the needle tip in the opposite direction,
- the movement mechanism further includes a spring element provided in a direction crosswise to the moving direction and compressed in the crosswise direction by movement of the fixation portion on the inclined plane, and
- the fixation portion is pressed against the inclined plane by the reaction force of the spring element.
Dependencies are inferred from the claim text.