Microneedle Patch Application Device with Spring-Locking Mechanism
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Solution Overview
Problem
Conventional microneedle patch application devices face challenges in simply and effectively inserting microneedle arrays into the skin due to the skin's elastic nature, which absorbs impact and prevents microneedle penetration.
Innovation Solution
A microneedle patch application device with a casing body, a pressing member, a biasing mechanism, and a locking system that allows for controlled movement of the pressing member to apply impact energy to the microneedle patch, ensuring reliable insertion into the skin with an adjustable impact energy range of 0.4-5.0 J.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a microneedle array is pressed against the skin with high impact to overcome skin elasticity, then microneedle insertion reliability is improved, but device complexity and ease of operation deteriorate
Solution Approach 1:
The patent combines the pressing member, biasing means, and locking member into an integrated assembly that works together as a unified mechanism. The pressing member is connected to the biasing means which is in turn connected to the locking member, creating a combined structure that delivers impact while maintaining simplicity
Solution Approach 2:
The biasing means automatically generates the impact force needed for microneedle insertion without requiring external power sources or complex actuation systems. The locking member self-activates upon receiving a predetermined force, releasing the pressing member to strike the microneedle patch and skin, thereby providing self-service functionality
2Reliability
If a spring mechanism is used to provide impact force for microneedle insertion, then insertion effectiveness is improved, but ease of operation and user-friendliness deteriorate
Solution Approach 1:
The spring-based biasing means automatically generates and stores mechanical energy, then releases it to provide the impact force needed for microneedle insertion. The locking member detects when a predetermined force is applied and automatically releases, causing the pressing member to strike the microneedle patch without requiring the user to manually trigger the release mechanism
Solution Approach 2:
The patent extracts the complex trigger mechanism from the user interface by making the locking member release automatically in response to applied force. This removes the need for users to manipulate additional controls or understand complex operation sequences, thereby improving ease of operation while maintaining insertion effectiveness
3Reliability
If air pressure or magnetic force is utilized for microneedle administration, then insertion capability is improved, but device complexity and simplicity deteriorate
Solution Approach 1:
The patent replaces complex pneumatic or magnetic systems with a simple mechanical spring-based biasing means. The spring provides the necessary impact force through pure mechanical energy storage and release, eliminating the need for air pressure tanks, compressors, magnetic coils, or associated control systems
Solution Approach 2:
The patent employs a simple, inexpensive spring mechanism that can be disposed of after use, rather than requiring complex, expensive pneumatic or magnetic systems that would need maintenance, calibration, or replacement of multiple components. The entire assembly including the spring is designed as a single-use unit
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 enables a simple and effective application of microneedle patches to the skin surface, ensuring reliable insertion of the microneedle array with minimal user effort and adjustable impact energy for optimal skin penetration.
Implementation Method 1
a first biasing means provided in the casing body and disposed to bias the pressing member in the first direction
Implementation Method 2
The pressing member is provided with a locking part which is engaged with the locking member so as to regulate movement of the pressing member in the first direction
Implementation Method 3
the lock-releasing member being movable in the second direction and being provided associated with the locking member so as to release a locked state
Implementation Method 4
the microneedle array must be administered to the skin at high speed and with impact
Data Source
AI summary
Provided is a device for surely and easily applying a microneedle patch to a skin.In a case body 2, a pressing member 3 having a tip surface 3a is disposed such that the pressing member is biased in a first direction X1 by a first biasing member. The movement in the first direction X1 is locked by a locking member 7 and a locking part 3g so that the pressing member 3 is brought into a locked state. The locked state is released by pressing a tip of a lock-releasing member 11 against the skin. When the locked state is released, a tip surface 3a of the pressing member 3 is moved in the first direction X1 and the tip surface 3a applies the microneedle patch to the skin.