Blood Lancet Device with Segmented Cap for Depth Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blood lancet devices with adjustable piercing depth mechanisms are often complex and difficult to operate with one hand, risking unintentional adjustments of the selected depth.
Innovation Solution
A blood lancet device featuring a cap with an adjusting wheel that is rotatable and longitudinally adjustable, coupled with arm-like segments for controlled operation, and a ratchet mechanism for gradual adjustment, ensuring secure and intuitive depth setting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cap element is arranged integrally on the housing and completely encompasses the outlet opening and lancet holder, then the structure is sealed and secure, but the device becomes difficult to adjust with one hand
Solution Approach 1:
The cap element is divided into a first cap portion that remains fixed on the housing and a second cap portion that can be moved relative to the first portion. This segmentation allows the user to adjust the outlet opening position with one hand while maintaining the structural integrity and seal of the overall cap assembly through the connection between the two portions.
2Adaptability or versatility
If adjustable stops are used in the front area of the blood lancet device to adjust piercing depth, then the piercing depth can be changed, but the device becomes complex and requires the stop to be fixed in a desired position to be changed
Solution Approach 1:
The adjustment function is merged into the cap element itself through the movable second cap portion, eliminating the need for separate adjustable stops. The user adjusts piercing depth by moving the second cap portion to different positions, which simultaneously changes the outlet opening position and sets the piercing depth, all through a single intuitive motion without requiring additional components or complex mechanisms.
3Adaptability or versatility
If the outlet opening is made more or less spaced apart from the rest of the housing by rotating a cap element with a thread, then the piercing depth can be adjusted, but the device becomes complex and difficult to operate with one hand
Solution Approach 1:
The cap element is segmented into fixed and movable portions, allowing the user to adjust the outlet opening by moving the second cap portion without needing to rotate the entire cap assembly. This segmentation enables one-handed operation by isolating the adjustment motion to a smaller, more manageable portion of the device.
Solution Approach 2:
The threading mechanism is extracted from the entire cap assembly and localized to only the second cap portion. This allows the user to perform adjustment by moving just the second cap portion rather than rotating the whole cap, making the device much easier to operate with one hand while still achieving the same piercing depth adjustment function.
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 easy, one-handed adjustment of piercing depth with enhanced control and safety, preventing unintentional changes and simplifying the operation process.
Implementation Method 1
The adjusting wheel (104, 204) has an internally threaded section and the cylindrical section is provided with an externally threaded section, the threaded sections being functionally connected to one another in such a way that the adjusting wheel is rotatable and adjustable in the longitudinal direction of the base body, i.e. that the rotary movement of the adjusting wheel is carried out by means of the threaded sections
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The application relates to a blood lancet device (101) comprising a base (103) for arranging device components. Said device components include a lancet holder for holding at least one lancet element, at least some sections of said lancet holder being surrounded by the base (103), and a cap (102) which is coupled to the base (103) and is used to dispose an adjusting wheel (104) on an at least partially cylindrical section of the cap (102) in order to adjust a plurality of projection lengths of the lancet element from the blood lancet device (101). The adjusting wheel (104) is surrounded by arm-type segments extending in the longitudinal direction in such a way that the adjusting wheel (104) can be actuated only in the segment-free circumferential sections in order to be able to adjust the projection length.