Insertion Needle Guidance Structure for Stable Biosensor Insertion
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Solution Overview
Problem
Conventional insertion devices for biosensors often cause discomfort due to oblique insertion and retraction of the piercing assembly, leading to instability and potential discomfort for the host.
Innovation Solution
The insertion module includes a main body with slide grooves and an auxiliary insertion seat with wing portions that provide stable guidance to the insertion needle, ensuring it remains parallel during insertion and retraction by using point-contact and gradually widened wall surfaces to prevent oblique movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional piercing assembly is used for inserting a biosensor into a host, then the insertion device can perform the insertion function, but the piercing assembly may be obliquely inserted into the host causing discomfort
Solution Approach 1:
The patent introduces a guiding structure as an intermediary component between the piercing assembly and the host. This guiding structure includes guide surfaces that constrain the piercing assembly to move along a predetermined path, ensuring perpendicular insertion into the host. The guide surfaces act as a mediator that transforms the uncontrolled oblique movement into controlled perpendicular movement, thereby eliminating host discomfort while maintaining the insertion function.
2Device complexity
If the piercing assembly is allowed to move freely during insertion, then the device structure can be simple, but the insertion needle may move obliquely causing instability
Solution Approach 1:
The patent employs a dynamic guiding mechanism where the guiding structure is designed to actively constrain the piercing assembly during movement. The guide surfaces are configured to engage with the piercing assembly and dynamically adjust to maintain perpendicular alignment throughout the insertion process. This dynamic constraint system provides stability during insertion while allowing the overall device structure to remain relatively simple by using geometric constraints rather than complex mechanical linkages.
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
This design stabilizes the insertion needle, reducing host discomfort by maintaining parallelism during the initial stroke distance and ensuring steady insertion and retraction, thereby alleviating the drawbacks of prior art devices.
Implementation Method 1
The protruding portion of each of the wing portions resiliently abuts against the wall surface of a respective one of the slide grooves in point-contact such that the auxiliary insertion seat is fixed before inserting into the host through the interference between the protruding portions and the wall surfaces
Data Source
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AI summary
A insertion module (30) includes a main body (31), an auxiliary insertion seat (38), an insertion needle assembly (36) and a sensor assembly (70) . The main body (31) has a plurality of slide grooves (313). The auxiliary insertion seat (38) has a base portion (381) and a plurality of wing portions (382) . The insertion needle assembly (70) is fixed through the interference between the wing portions (382) and wall surfaces of the slide grooves (313), such that the insertion needle (70) is prevented from being oblique to an insertion direction (F) before the insertion needle (70) is inserted into a host.