Puncture Device Depth Adjustment Mechanism
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Solution Overview
Problem
Existing puncture devices face challenges in adjusting piercing depth while minimizing pain and ensuring safety, particularly when combining cam mechanisms and safety lancets, as these configurations often complicate depth adjustment and increase the risk of needle exposure.
Innovation Solution
A puncture device with a piercing depth adjusting mechanism that includes a first movable member, a second member for retaining the puncture element, and a third member that rotates to move the second member, allowing for adjustable piercing depth through a rotational motion, along with a safety lancet design that retains the needle within a casing to prevent exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cam mechanism is employed to reduce pain and avoid multiple piercings, then piercing safety and comfort are improved, but the ability to adjust piercing depth is lost due to linked component operations
Solution Approach 1:
The device segments the depth control function from the cam mechanism operation. A separate depth adjustment mechanism with an adjustable stop allows independent setting of the lancet holder's movement distance, while the cam mechanism continues to provide smooth motion control. This segmentation enables both pain reduction through cam action and depth adjustability through the separate adjustment mechanism.
2Reliability
If a safety lancet with casing is used to prevent needle exposure, then user safety is improved, but the mechanism for adjusting piercing depth becomes more difficult to provide
Solution Approach 1:
The lancet is nested within the casing, with the lancet holder positioned to allow the lancet to extend through the casing during piercing. The adjustable stop mechanism is integrated into the housing structure, creating a nested arrangement where the depth adjustment components are housed within the existing casing structure. This nesting approach maintains safety while enabling depth adjustment without excessive complexity.
3Ease of operation
If the moving distance of the lancet holder is regulated by cam mechanism component shapes, then piercing comfort is improved, but flexibility in adjusting piercing depth is reduced
Solution Approach 1:
The device combines the static cam profile (which provides smooth motion for comfort) with a dynamic adjustable stop mechanism. The stop mechanism allows the user to dynamically change the travel distance of the lancet holder before each piercing operation. This dynamic adjustment capability complements the static cam mechanism, maintaining piercing comfort while adding depth flexibility.
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 safe and adjustable piercing with reduced pain by allowing precise control over the puncture depth and ensuring the needle remains within the casing, preventing accidental exposure and multiple piercings.
Implementation Method 1
a link member (40) having a fixed shaft (40C) and a movable shaft (40B), and the moving member (41) moves when the link member (40) rotates
Data Source
AI summary
The present invention relates to a puncture device 1 for moving a puncture element 21 in a piercing direction N1 and for piercing a target site with the puncture element 21. The puncture device 1 is for moving a second member 42 retaining the puncture element 21 in the direction N1 and in a direction N2 by the rotational motion of a third member 40 as a first member 41 moves in the directions N1 and N2. The puncture device 1 further comprises a piercing depth adjusting mechanism 6 of adjusting a piercing depth of the puncture element 21 to the target site by regulating a rotation angle of the third member 40.