Implant Injection Device Sequential Thrust Release
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Solution Overview
Problem
Existing implant injection devices are inefficient in injecting multiple implants due to limited user control over the injection process, leading to potential inaccuracies and increased risk of injury or implant rupture, as they require thumb actuation with a short stroke and lack precision control.
Innovation Solution
An implant injection device featuring a push rod with thrust and intermediate stop mechanisms, allowing sequential injection of implants with user-controlled actuation, providing tactile or audible feedback to ensure precise placement and preventing accidental injection of subsequent implants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a sliding-press actuation mechanism is used, then the device structure is simplified, but the user control precision and injection accuracy deteriorate due to limited thumb stroke and inability to stop injection at predetermined positions
Solution Approach 1:
The actuation mechanism is segmented into multiple independent components: a push rod for linear pushing motion, a button for lateral actuation, and intermediate stop means with tactile feedback positions. This segmentation allows the user to control injection depth precisely by stopping the push rod at predetermined positions marked by tactile feedback, while keeping the overall structure simple.
Solution Approach 2:
The intermediate stop means provide tactile feedback to the user at predetermined positions during the push rod stroke. This feedback mechanism allows the user to accurately judge when to stop the injection at specific depths without requiring complex measurement systems, resolving the contradiction between simple structure and precise control.
2Productivity
If a continuous injection mode is used, then the injection speed is increased, but the risk of unintentional injection and patient injury increases due to lack of control between implants
Solution Approach 1:
The injection process is divided into periodic cycles, each corresponding to the injection of a single implant. The intermediate stop means create distinct phases: pushing the push rod to inject one implant, stopping at a predetermined position, and preparing for the next implant. This periodic action maintains safety and control while allowing efficient sequential injection of multiple implants.
3Productivity
If the push rod stroke is extended to inject multiple implants, then the productivity is improved, but the manufacturing precision and injection accuracy deteriorate due to difficulty in maintaining precision over long stroke
Solution Approach 1:
The long push rod stroke is segmented into multiple smaller segments, each corresponding to the injection of one implant. The intermediate stop means divide the total stroke into discrete portions with tactile feedback at each segment boundary. This allows the user to maintain precision for each individual implant injection while achieving the injection of multiple implants sequentially.
Data Source
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AI summary
The invention relates to an implant injection device (1), comprising: - an injection needle (3), - a receiving body (7) for at least one first implant and a second implant, - injection means (11), comprising: . a push rod (37), disposed upstream of said implants housed in the receiving body (7) and configured to push the first implant and the second implant through the injection needle (3) between an initial position and a final position in which the first implant and the second implant are injected, . push means (39) on the push rod (37), configured to exert a force tending to move the push rod (37) from the initial position to the final position, .intermediate stop means (41) for maintaining the push rod (37) in an intermediate position between the initial position and the final position, which oppose the force exerted by the push means (39) when the stroke of the push rod (37) reaches a predetermined distance corresponding to the injection length of the first implant, . actuation means (43) by a user, configured to release a displacement of the push rod (37) from the intermediate position to the final position.