Single-Action Biosensor Insertion Device With Auto-Retraction

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Solution Overview

Problem

Conventional insertion devices for biosensors require a two-action operation, where failure to release the plunger can result in the piercing member remaining inserted, causing discomfort to the host.

Innovation Solution

An insertion device with a cover body and an insertion module that includes pre-compressed elastic members, allowing for a single-action operation with automatic-insertion and automatic-retraction, utilizing elastic members to drive the insertion and retraction processes without manual intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a two-action operation is used for inserting and retaining the biosensor, then the biosensor can be securely held in place, but the host may experience discomfort if the plunger is not released promptly

Engineering Contradiction:

Improvesecure retention of biosensorVSAvoidhost discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The piercing member is pre-loaded in a ready-to-insert state within the insertion device. Upon activation, the elastic member immediately drives the piercing member into the host without requiring manual manipulation, eliminating the delay that causes discomfort. The retraction mechanism is also pre-configured to automatically withdraw the piercing member after a predetermined time interval

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The insertion device performs both insertion and retraction operations automatically without continuous manual control. The elastic member provides self-driven insertion force, and the timing mechanism automatically triggers retraction after the predetermined interval, eliminating the need for the operator to remember or manually execute the release action

Inventive Principle:

Principle #25Self-service

2Ease of operation

If manual control is required for insertion and retraction, then the operator can control the timing, but the operation becomes complex and prone to user error

Engineering Contradiction:

Improvemanual control flexibilityVSAvoidtwo-action operation sequence

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The insertion and retraction functions are merged into a single integrated device with automatic timing control. The activation of one action (insertion) automatically triggers the sequence that includes the predetermined waiting period and the subsequent retraction, reducing the operational sequence from two separate manual actions to one automated process

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The manual mechanical control system is replaced with an automatic timing and control mechanism. The elastic member provides automatic insertion force without manual pressure, and the timing mechanism automatically determines when retraction should occur, eliminating the need for the operator to coordinate multiple manual actions

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If the piercing member remains inserted for an extended period, then the biosensor can be securely positioned, but the host experiences prolonged discomfort

Engineering Contradiction:

Improvesecure positioning of biosensorVSAvoidinsertion duration

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The piercing member is inserted for a brief initial period to establish secure positioning of the biosensor, then automatically retracted after a predetermined time interval. This periodic action pattern (insertion → waiting period → retraction) ensures the biosensor is securely positioned during the critical measurement phase while minimizing the duration of host discomfort

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The insertion and retraction operations are executed rapidly without prolonged intermediate states. The piercing member is quickly inserted to establish positioning, the system skips through the measurement period, and then quickly retracts, minimizing the total duration the piercing member is in the host and reducing host discomfort

Inventive Principle:

Principle #21Skipping (Rushing through)

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 performs insertion and retraction operations in less than 100 milliseconds, reducing user discomfort and ensuring quick, efficient insertion and removal of biosensors with minimal manual effort.

Implementation Method 1

the insertion seat is driven by a restoring force of the pre-compressed first elastic member to perform an automatic-insertion operation

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the retraction seat is driven by a restoring force of the pre-compressed second elastic member to perform an automatic-retraction operation

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS12427253B2Insertion device for a biosensor and insertion method thereof

Publication Date: 2025.09.30 BIONIME

AI summary

An insertion device includes a cover body and an insertion module. The insertion module is disposed in the cover body, and includes a main body, an insertion seat, a pre-compressed first elastic member, a retraction seat and a pre-compressed second elastic member. The restoring force of the pre-compressed first elastic member is configured not to act on the cover body during depression of the cover body.