Rear Depth Adjustment Mechanism for Lancing Device

Solution Overview

Problem

The installation of a lancet in existing lancing devices often interferes with the penetration depth adjustment mechanism, leading to unintended changes in penetration depth, particularly for diabetic patients who require consistent settings.

Innovation Solution

A lancing device with a rear adjustment mechanism featuring an external depth adjusting sleeve and a medium depth adjusting sleeve, where the ejection pin is located in the medium depth adjusting sleeve, and the external sleeve is sleeved outside, allowing for manual rotation to adjust the penetration depth without affecting the original structure, using a rotary locating mechanism and a moving mechanism via spiral grooves and drive blocks.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the adjusting tip is arranged at the front of the lancing device, then the penetration depth can be adjusted, but the lancet installation interferes with the adjustment mechanism causing unintended changes in penetration depth

Engineering Contradiction:

Improvepenetration depth adjustmentVSAvoidpenetration depth consistency

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The adjustment mechanism is relocated from the front of the lancing device to the rear, changing the spatial dimension of the adjustment component. This dimensional relocation allows the adjusting tip to be positioned behind the lancet installation path, eliminating the interference between lancet installation and depth adjustment while maintaining the adjustment functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

Instead of placing the adjustment mechanism at the conventional front position, the invention inverts the arrangement by positioning the adjusting tip at the rear of the lancing device. This inverted configuration allows the adjustment to occur independently of the lancet installation process, preventing unintended depth changes during lancet insertion.

Inventive Principle:

Principle #13The other way round (Inversion)

2Adaptability or versatility

If the adjusting tip is arranged at the front of the lancing device, then the penetration depth can be adjusted for different users, but the adjustment may be changed by mistake during lancet installation

Engineering Contradiction:

Improvepenetration depth adaptabilityVSAvoidadjustment stability

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The adjustment mechanism is relocated from the front of the lancing device to the rear, changing the spatial dimension of the adjustment component. This dimensional relocation allows the adjusting tip to be positioned behind the lancet installation path, eliminating the interference between lancet installation and depth adjustment while maintaining the adjustment functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The adjustment function is extracted from the front assembly area and separated into an independent rear-mounted mechanism. This extraction removes the adjustment operation from the critical zone where lancet installation occurs, preventing accidental changes while preserving the ability to adjust penetration depth when needed.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of operation

If the penetration depth adjustment mechanism is placed at the front, then it can be adjusted, but it complicates the overall device structure and increases manufacturing difficulty

Engineering Contradiction:

Improvepenetration depth adjustmentVSAvoidadjustment mechanism complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The adjustment mechanism is relocated from the front of the lancing device to the rear, changing the spatial dimension of the adjustment component. This dimensional relocation allows the adjusting tip to be positioned behind the lancet installation path, eliminating the interference between lancet installation and depth adjustment while maintaining the adjustment functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The rear-mounted adjusting tip is designed to work with the existing lancing device structure, serving both as a depth adjustment mechanism and as an integrated part of the overall device assembly. This multi-functional design reduces the need for separate components and simplifies the overall device complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11766201B2Lancing device with rear adjustment of penetration depth

Publication Date: 2023.09.26 STERILANCE MEDICAL SUZHOU

AI summary

A lancing device with rear adjustment of penetration depth includes a cap, cap holder, ejection pin and shell, wherein: the lancing device has an external and medium depth adjusting sleeve. The ejection pin is located in the medium sleeve and the external depth adjusting sleeve is sleeved outside the medium sleeve; the external sleeve connects axially and circumferentially to the shell, and a rotary locating mechanism is between the external sleeve and the shell; the medium sleeve is connected circumferentially and axially in a sliding way, and a rotary moving mechanism is between the medium the external sleeve, and the medium includes a passive impact face relative to the active impact face of the ejection pin; the external sleeve includes a manual adjusting ring outside the lancing device at the middle and rear part, and rotates to drive the medium sleeve to move axially, changing the needle tip penetration depth.