Automatic Syringes TRIZ Cases

A needle magazine and re-sealable septa support multiple injections while preserving drug and fluid-pathway sterility.

A pre-assembled barbed grasper on the autoinjector cap removes the needle sheath while reducing needle damage and contamination.

This case uses material property changes to block movement when cold and permit medicament delivery at suitable temperatures.

Separate springs reduce injection impact and support consistent needle depth.

A decoupled spring mechanism helps the auto-injector insert the needle smoothly and deliver complete doses across medicament viscosities.

A varying-surface rotating member and linear-guided sensor simplify dose monitoring and enable separate electronic disposal.

Mechanical interaction between a resilient tongue and plunger cut-out signals expulsion status without complex electronic feedback.

This injection device locks the needle shield until dose delivery, reducing premature removal after misleading priming sounds.

Magnetic sensors track injection dose while position locking limits reading errors.

This case uses warning and gripping zones to guide pressing direction and reduce finger mis-administration in two-step injections.

A staged spring-energy injector maintains force and delivery rate across viscosity changes, supporting accurate dosing and user comfort.

A rotating collar converts shroud motion into rotation, reducing skin pressure while supporting complete dosing and safe needle retraction.

A patient-controlled injector counts administrations and uses timing control to prevent overuse while preserving self-administration.

A guided impactor and sensors reveal syringe loads and fluid pressure, helping refine drug delivery devices for high-viscosity biologics.

A ratchet brake lets pen injectors correct doses without knob rotation while limiting settings to the remaining medication.

A door-driven plunger and interlock sleeve provide aligned, battery-free spring injection for users who struggle with continuous force.

The safety shield rotates a cam to unlock the button, releasing the plunger for rapid two-action injection without accidental activation.

A safety shield rotates a cam to unlock the plunger retainer, simplifying emergency injection while helping prevent accidental needlesticks.

A hinged door moves the plunger and preloads a drive spring, enabling complete, battery-free dosing without continuous button force.

Optical sensing differentiates port housing and septum materials, helping non-clinical caregivers locate ports and administer medication.

A torsion and compression spring with screw-driven plunger smooths force delivery for viscous medicines and patient comfort.