Infusion Needles TRIZ Cases

Optimizing the length-to-diameter ratio of a thin wall cannula reduces injection force and time for viscous medicaments.

A spring member propels a needle cover to shield the tip, preventing needle stick injuries.

Interlocking beads on a syringe interface seal the needle sheath, eliminating O-rings and reducing assembly complexity.

Radial openings in integral latches enable twisting motion to reduce retraction force by 75%.

An interdigitated storage container segments new and used needles into distinct positions, reducing device volume while preventing accidental reuse.

A Huber safety needle assembly uses a hinge mechanism to retract the sharp tip inside the body structure.

A safety needle device uses a movable cover and guide sleeve to enclose the needle tip during subcutaneous port puncture procedures.

An early-triggering mechanism locks the needle guard after a partial stroke, preventing accidental contact and contamination when external force is absent.

An axially displaceable shield locks via deflectible projections to enclose the needle, resolving complexity and reliability trade-offs.

A spring-driven carriage moves along a helical path inside a retraction housing to pull a medical sharp into a protective outer shell.

An adhesion connection between the plunger and needle assembly simplifies retraction by replacing complex mechanical locks with a thin liquid film.

A needle cover assembly uses a spinning attachment to rotate the removal cap independently from the rigid needle shield.

A single ring component provides pre-use and post-use locking via dual grooves, reducing structural complexity while ensuring reliable needle storage.

An insertion device employs a separable base plate to anchor infusion cannulas, preventing flexing and irritation during tissue placement.

A passively activated safety needle assembly retracts the outer shield over the needle upon withdrawal to prevent reuse.

C-shaped adapter stabilizes needle cannula at precise angle, resolving inconsistent dermal placement and pain from variable skin thickness.

An expanded needle hub contact surface limits tissue penetration depth and reduces pain sensation during subcutaneous injection.

An intermediary device uses a tapered aperture to grip and pull needle sheaths, eliminating direct finger contact with sharp tips.

A safety syringe needle holder mounts a protective mechanism around the barrel to conceal the needle tip.

Shielded pen needles extend the hub beyond its sleeve, concentrating force for deeper cannula entry.

Perforated non-adhesive substrates enable device adjustment without full removal, reducing skin irritation during hemodialysis procedures.

Radial stopping means engage barrel pins to lock the syringe mechanism after use.

A pen needle tip assembly uses a locking mechanism to prevent reuse.

Pivoting sheath encloses needle in starting position to reduce assembly footprint.

An axially movable shield grabber connects to a needle shield within a medicament delivery device front cap.

A needle assembly with a movable body adjusts injection depth via hub displacement.

Recessed anvils form outer surface features while a mandrel protects the inner lumen from occlusion, preserving flow efficiency.

An integrated cover and stop mechanism prevents inadvertent needle stick injuries by securely enclosing the tip during extended conditions.

Shuttlecock-shaped elastic supporter blade integrates safety protection into pen needle hub, preventing reuse while reducing manufacturing complexity.

A sleeve uses a deformable bridge to deflect longitudinal legs for radial movement during container installation.

A safety syringe barrel features a flexible folded ring that unfolds to secure the needle hub during plunger insertion.

Telescopic housing drives an indicating component away from the shroud via spring bias, resolving uncertainty about dose completion while shielding the cannula.

A needle assembly with a slidable collar and deformable sleeve segments enables axial removal from an injection pen boss.

A helical syringe holding cylinder advances along a track to rotate and expand a tightening ring for needle extraction.

Dual biasing elements position the needle hub and shield to cover both ends, eliminating exposure of the proximal end.

Segmentation separates delivery from protection, resolving incomplete liquid discharge during small volume injections.

Hinged sheaths pivot over needles while ramped tabs lock into slots to prevent accidental exposure.

A shieldable needle assembly uses a biasing mechanism to cover the cannula tip during handling.

An asymmetric clamping mechanism tilts the pressure seat against the sleeve, preventing reuse and eliminating medical accidents.

Magnetic actuation eliminates sliding friction between the plunger and housing, enabling efficient energy transmission during insertion.

A universal safety syringe retracts the needle into the barrel using a spring mechanism triggered by plunger movement.

Segmented wells in the outer cover separate the inner shield from the needle hub during use, eliminating manual handling of sharp components.

Coaxial alignment of syringe caps with a single X-ray beam detects crooked cannulas, eliminating complex dual-source systems while ensuring sterility.