Syringe Finger Grip With Tactile Dose Feedback
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Solution Overview
Problem
Conventional syringes lack user-friendly dosing aids that provide accurate feedback on injected volume and injection rate, often requiring users to divert attention from the treatment area, and mechanical or electronic injectors are cumbersome and expensive.
Innovation Solution
A finger grip for syringes with a moveable engagement member that engages with the plunger rod, providing tactile and sound feedback, and an activation member for easy switching between active and inactive positions, allowing needle aspiration and minimizing distraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a gradation scale is provided on the syringe barrel for dosing, then dosing capability is improved, but the scale is difficult to see and may be covered by stickers or held at angles where it is hidden, reducing measurement precision
Solution Approach 1:
The patent replaces the visual mechanical gradation scale with an acoustic feedback system. The engagement member produces audible clicks or tactile feedback when engaging with the plunger rod at specific intervals, providing dosing information through sound rather than visual observation. This substitution eliminates the visibility problems of traditional scales while maintaining dosing precision.
Solution Approach 2:
The engagement member provides real-time acoustic and tactile feedback to the user during plunger movement. Each engagement event generates a detectable signal that informs the user about the injected volume and injection rate without requiring visual attention to a scale, thus improving both measurement precision and ease of operation.
2Measurement precision
If the user observes the gradation scale during injection, then dosing information is obtained, but distraction of attention arises when the user has to look at the scale instead of focusing on the treatment area, reducing ease of operation
Solution Approach 1:
The visual observation requirement is replaced with acoustic/tactile sensing. The engagement member generates audible clicks or vibrations that the user can perceive through hearing or touch while maintaining visual focus on the treatment area. This substitution removes the need for visual attention shifts, improving ease of operation while preserving dosing information delivery.
Solution Approach 2:
The system provides continuous passive feedback through acoustic and tactile channels that do not require active user attention shifts. The user receives dosing information automatically through sound or vibration feedback from the engagement member, allowing uninterrupted visual monitoring of the treatment area.
3Measurement precision
If mechanical or electronic injectors are used for accurate dosing, then dosing precision is improved, but they are more expensive and heavier than syringes, increasing device complexity
Solution Approach 1:
The patent extracts only the essential dosing feedback function from complex mechanical or electronic injectors. Instead of using a full electronic dosing system, it implements a simple engagement member with grooved surfaces that provides acoustic/tactile feedback through basic mechanical engagement, achieving accurate dosing with minimal added complexity.
Solution Approach 2:
The engagement member is designed as a simple, inexpensive mechanical component that can be integrated into disposable syringes. It provides accurate dosing feedback through basic mechanical engagement and acoustic feedback, avoiding the need for expensive electronic components while maintaining dosing precision.
4Measurement precision
If an engagement member is made movable between active and inactive positions, then feedback functionality is improved, but the operation of moving the engagement member is uncomfortable, worsening ease of operation
Solution Approach 1:
The engagement member is designed to be automatically activated by the natural movement of the plunger rod during injection. The plunger rod's movement directly engages or disengages the engagement member with the grooved surface, eliminating the need for separate manual operation. The system serves itself through the injection process, improving ease of operation while maintaining feedback accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate dosing with tactile and auditory feedback, ensuring safe and convenient administration without diverting user attention, and facilitating needle aspiration.
Implementation Method 1
tactile and sound feedback is given to a user as the plunger is moved relative to the finger grip
Implementation Method 2
tactile and sound feedback is given to a user as the plunger is moved relative to the finger grip
Data Source
AI summary
The present invention relates to a finger grip (1) arranged to be connected to a syringe barrel having a plunger and a plunger rod for driving said plunger. The finger grip comprises a body having a lower side with finger supporting surfaces (13) for supporting fingers of a user during handling and an engagement member (5) being moveable between an inactive position where the engagement member is arranged not to engage with the plunger rod of the syringe barrel and an active position where the engagement member is arranged to engage with a grooved surface on the plunger rod of the syringe such that feedback is given to a user as the plunger is moved relative to the finger grip. An activation member (7) for moving the engagement member from said inactive position to said active position is built-in into the finger grip.