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Publication Number
US-12311154-B2
Publication Date
2025-05-27
Expiration Date
Abstract
To provide a medical needle capable of preventing malfunction of a movement mechanism at the time of use, and improving safety even further. A medical needle 1A includes: a needle portion 10; a case 20 which is capable of exposing a needle tip of the needle portion 10 from a distal end, and is capable of accommodating the needle portion 10; a movement mechanism M which moves the needle portion 10 inside the case 20; an operation portion 62 for operating the movement mechanism; and an operation regulation portion 80A that regulates operation of the operation portion 62.
Core Innovation
The invention relates to a medical needle having a needle portion and a case that is capable of exposing a needle tip of the needle portion from a distal end and accommodating the needle portion. The medical needle includes a movement mechanism that moves the needle portion inside the case until the needle tip protruding from the case is accommodated inside the case. The medical needle further includes an operation portion for operating the movement mechanism, where pressing is allowed in a pressing operation direction perpendicular to a movement direction of the needle portion when the needle portion is moved by the movement mechanism.
An operation member is included in the movement mechanism, and the operation portion is integrally formed with the operation member. The medical needle provides an operation regulation portion that regulates the pressing operation of the operation portion. An engaging portion is engaged with the operation regulation portion in the movement direction of the needle portion and overlaps the operation regulation portion in the pressing operation direction, so that the pressing operation is regulated by the engagement.
The case includes a first opening and a second opening, and the case further includes a flat plate-shaped portion extending from an end of the second opening. The engaging portion is configured at a distal end of the flat plate-shaped portion and includes a flat surface portion extending in parallel with the longitudinal direction at an outside in the radial direction of the end portion at the distal end. The operation member includes the operation portion and the operation regulation portion, where the operation regulation portion is a notch opened to a proximal end side and concave in a U-shape along the movement direction of the needle portion, and regulation is performed by direct contact between the first flat surface and the facing flat surface portion.
Claims Coverage
The medical needle has one independent claim. Across the dependent claims referenced, the independent claim’s inventive features are refined by specifying switching between regulating and releasing, limiting regulation to a protruding state, introducing biasing to maintain engagement, configuring distal movement to disengage and release regulation, and defining additional contact geometry during engagement.
Needle and distal-exposing case with movement mechanism
A case which is capable of exposing a needle tip of the needle portion from a distal end, and is capable of accommodating the needle portion; a movement mechanism which moves the needle portion inside the case until the needle tip protruding from the case is accommodated inside the case.
Operation portion enabling perpendicular pressing
An operation portion for operating the movement mechanism, configured to allow a pressing operation in a pressing operation direction perpendicular to a movement direction of the needle portion when the needle portion is moved by the movement mechanism.
Integrally formed operation member and operation portion
An operation member which is included in the movement mechanism and in which the operation portion is integrally formed.
Operation regulation portion engaged with overlapping engaging portion
An operation regulation portion that regulates the pressing operation of the operation portion; and an engaging portion that is engaged with the operation regulation portion in the movement direction of the needle portion and overlaps the operation regulation portion in the pressing operation direction.
U-shaped notch operation regulation with first/second flat surfaces for direct contact regulation
The operation regulation portion is a notch which is formed to be opened to the proximal end side and to be concave in a U-shape along the movement direction of the needle portion, the notch comprising: a first flat surface disposed at an outside with respect to the flat plate-shaped portion in the radial direction and extending in parallel with the longitudinal direction; a bottom surface for the U-shape extending from an end portion at the distal end side of the first flat surface radially inwardly in the pressing operation direction; and a second flat surface disposed at an inside with respect to the flat plate-shaped portion in the radial direction and extending in parallel with the first flat surface in the longitudinal direction from an end portion at the distal end side of the bottom surface toward the proximal end side, wherein the first flat surface and the flat surface portion facing each other are configured to directly contact with each other to regulate the pressing operation.
The claim coverage centers on a distal-exposing medical needle in which perpendicular pressing is allowed only under controlled regulation. The regulation is implemented by an operation regulation portion (a U-shaped notch) that engages an engaging portion and overlaps in the pressing direction so that direct surface contact regulates the pressing operation.
Stated Advantages
Prevents malfunction.
Prevents accidental puncturing.
Prevents blood scattering.
Suppresses collision noises via an impact mitigating portion.
Documented Applications
Used as a medical needle for puncture/blood sampling, where regulation is intended to prevent erroneous activation during puncture/blood sampling.
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