Syringe Protecting Device Pre-locking Ring Mechanism
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Solution Overview
Problem
Conventional syringe protecting devices are prone to malfunction, have unreliable locking mechanisms, complex structures, numerous components, assembly difficulties, and obscure the state of the medical solution being administered, leading to potential needle sticking accidents.
Innovation Solution
A syringe protecting device with a simple configuration featuring an outer cylinder, an inner cylinder, and a spring mechanism, along with a pre-locking and post-locking mechanism using a ring and groove sections to securely store the syringe needle within the outer cylinder after use, preventing accidental exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is provided to prevent operation before use, then reliability is improved, but device complexity increases
Solution Approach 1:
The pre-locking mechanism and post-locking mechanism are merged into a single integrated locking system that uses the same ring component for both functions. The ring simultaneously provides pre-locking engagement with the outer cylinder and post-locking engagement with the inner cylinder, eliminating the need for separate locking mechanisms and reducing overall device complexity while maintaining reliability
Solution Approach 2:
The ring component serves multiple functions: it acts as both the pre-locking mechanism (engaging with outer cylinder groove before use) and the post-locking mechanism (engaging with inner cylinder groove after use). This multi-functionality reduces the number of components needed while ensuring reliable locking at both stages of the device lifecycle
2Reliability
If a locking mechanism is provided to prevent needle exposure after use, then reliability is improved, but device complexity increases
Solution Approach 1:
The same ring component that provides pre-locking functionality is also used for post-locking. After the inner cylinder moves rearward to store the needle, the ring engages with a groove in the inner cylinder to maintain the locked position, thereby providing needle protection without adding separate components or increasing device complexity
Solution Approach 2:
The ring is pre-positioned to engage with the outer cylinder groove before use (pre-locking). After the inner cylinder moves rearward, the ring automatically engages with the inner cylinder groove (post-locking), ensuring the needle is securely stored without requiring additional active locking actions or complex mechanisms
3Ease of manufacture
If the structure is simplified, then ease of manufacture is improved, but reliability may deteriorate
Solution Approach 1:
By combining the pre-locking and post-locking functions into a single ring component with two engagement grooves, the device structure is significantly simplified, making assembly easier. Despite the simplified structure, reliability is maintained because the ring provides secure engagement at both the pre-use and post-use stages through its dual groove design
Solution Approach 2:
The ring component performs both pre-locking and post-locking functions, reducing the total number of parts and simplifying manufacturing and assembly. The multi-functional design ensures that reliability is not compromised, as the same robust component reliably secures the device in both its initial and final states
4Device complexity
If the protecting device is made compact, then device complexity is reduced, but visual recognition of medical solution state becomes difficult
Solution Approach 1:
The protecting device uses transparent cylindrical shells (outer cylinder and inner cylinder) that allow visual observation of the medical solution state through the walls of the cylinders. This transparency maintains compactness while enabling clear visual recognition of the solution level and administration progress without requiring additional viewing windows or complex optical components
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
The device effectively prevents needle sticking accidents by securely storing the syringe needle, preventing malfunction, and allowing clear visualization of the medical solution's state, with a robust and easy-to-assemble design.
Implementation Method 1
a spring provided in the circumferential space between the inner face of the rear section of the outer cylinder and the outer face of the rear section of the inner cylinder in a compressed state in the front-rear direction so that the inner cylinder is energized rearward with respect to the outer cylinder, wherein when the spring is released from the compressed state, the inner cylinder is moved rearward with respect to the outer cylinder so that the syringe needle is stored inside the outer cylinder
Data Source
AI summary
A syringe protecting device equipped with an outer cylinder, an inner cylinder and a spring, wherein, when the spring is released from its compressed state, the inner cylinder is moved rearward with respect to the outer cylinder so that a syringe needle is stored inside the outer cylinder, and the syringe protecting device further equipped with a releasable pre-locking mechanism for fixing the inner cylinder to the outer cylinder while maintaining the spring in the compressed state in the front-rear direction, wherein, the pre-locking mechanism fixes the inner cylinder before movement to the outer cylinder by engaging the protruding sections of the ring with the engaging sections of the through groove sections.