Automatic Syringes TRIZ Cases

A rotatable valve stem switches fluid paths between an external vial and internal reservoir, eliminating complex needle manipulations that cause leakage.

Dual motors extend the concealed needle for injection then retract it, resolving needle aversion while accommodating variable fluid viscosity.

A switching cam mechanism controls needle retraction timing in an autoinjector to ensure complete product dispensing.

An intermediary metal structure isolates the spring element from plastic housing parts, preventing creeping and extending shelf life.

An integrated actuating unit slides a high-pressure air source against a piercing needle to unseal the device without external tools.

A coaxial activation member uses flexible arms to disengage a plunger rod support during needle cover compression.

A transparent section in the retraction assembly reveals a moving end-of-dose visual indicator upon drug administration.

A pre-filled syringe safety device uses a telescoping needle shield and resilient locking mechanism to automatically cover the injection needle after use.

A syringe plunger positioning apparatus uses an actuator and dynamic arm members to engage plunger buttons for automated filling operations.

A removable syringe micro pump uses a nested volute spring to drive the plunger seal without external power.

A drug delivery cap integrates a switch assembly activated by orthogonal motion to power electronic components.

Removable add-on module with camera captures dose indicator images via form-fitting mounting structures, preventing logging errors from misalignment.

Nested coaxial dose wheels provide large-scale readability for visually impaired users while maintaining compact device dimensions.

Nesting a gas canister within a hollow plunger rod reduces device volume while providing sufficient injection force for high viscosity medicaments.

A rotary drive mechanism uses coaxial tracks to move a medicament container carrier for injection.

An auto-injector biaser reduces manual priming force by providing assisting torque, enabling high-drive spring operation.

Replacing cam-and-wedge mechanisms with a toothed clutch and deformable spring eliminates breaking issues while ensuring precise dose setting.

A drug delivery pen uses paired zero markers and image analysis to detect the scale drum's true initial rotational position.

Asymmetric mechanical coding on drug delivery device housing prevents incorrect cartridge loading by matching unique geometric features.

Gear mechanism with damping grease replicates injection resistance and duration, reducing medication wastage during training.

Segmented chambers maintain drug potency by storing components separately, enabling rapid reconstitution via a sliding plunger mechanism.

A position discriminator segments continuous sensor signals into binary states to resolve measurement precision versus signal reproducibility trade-offs.

Segmented springs manage priming force and return resistance, enabling higher vacuum levels.

A dual-syringe injection device uses a shutter mechanism to separate high viscosity filler from low viscosity aspiration fluid.

A segmented needle magazine and automated exchange mechanism prevent reuse, maintaining sterility and strength while reducing health risks.

Non-rotationally symmetric housing geometry indicates correct grip orientation, reducing accidental needle exposure risk during drug delivery.

A veterinary applicator uses a perpendicular barrel and triggered piston to dispense fluids.

Interconnected rotatable elements with corrugations allow dose setting and correction using a spring element, eliminating complex cam-and-wedge mechanisms.

Offset piston seals in a multi-opening cylinder prevent fluid overflow while enabling precise aseptic delivery.

A flexible arm maintains a transport lock during rear cap insertion, reducing accidental activation risk while easing assembly.

A spring wire finger guard flexes inward to obstruct orifice access while allowing needle advancement through the injection device.

Slit-based grip component accommodates axial tolerances during shield removal without compromising needle seal integrity.

A drug delivery device uses a magnetic actuator to partially retract the injection member after insertion.

A single-use auto-injector uses mechanical power supplies to deliver drug doses through a controlled plunger mechanism.

A locker mechanism in an autoinjector housing prevents inadvertent injection by blocking the holder until the needle cover retracts.

Replacing electric motors with a spring-loaded piston system, this device maintains infusion precision while enabling safe operation near MRI scanners.

Protrusions on the flexible arm lock the release button to prevent return, resolving user uncertainty about device activation status.