Cosmetic Injector Microneedle Array for Low-Contamination Assembly
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Solution Overview
Problem
Existing cosmetic injectors face challenges in easily mounting microneedles on the head part, risk of microneedle breakage during assembly, and potential contamination during manufacturing.
Innovation Solution
A cosmetic injector design with a microneedle part that includes a microneedle plate and microneedles integrally formed, featuring a resting protrusion and coupling mechanism to facilitate easy assembly and prevent breakage, while minimizing manual handling and contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If microneedles are individually mounted on the head part, then the microneedles can be precisely positioned, but the mounting process becomes complex and time-consuming
Solution Approach 1:
The microneedles are integrated into a single microneedle array structure rather than being individually mounted. This merging of multiple microneedles into one unified component simplifies the mounting process to a single operation while maintaining precise positioning through the array's integrated design
Solution Approach 2:
The microneedles are pre-positioned and fixed together as an integrated array before being mounted on the head part. This preliminary arrangement of microneedles in their final positions eliminates the need for individual mounting operations and ensures precise positioning is achieved during the preliminary array fabrication rather than during final assembly
2Manufacturing precision
If microneedles are individually mounted on the head part, then each microneedle can be precisely positioned, but the manufacturing time increases
Solution Approach 1:
Multiple microneedles are combined into a single integrated array component, allowing all microneedles to be mounted simultaneously in one operation rather than individually. This merging dramatically increases manufacturing speed while the integrated array design ensures precise positioning is maintained
Solution Approach 2:
The microneedles are pre-assembled into an integrated array with precise positioning already established during array fabrication. This preliminary action of creating the pre-positioned array enables rapid single-step mounting on the head part, significantly improving manufacturing productivity without sacrificing positioning precision
3Ease of operation
If microneedles are manually handled during assembly, then flexible positioning is possible, but contamination risk increases
Solution Approach 1:
Multiple microneedles are merged into a single integrated array that is handled as one unit rather than individual components. This reduces the number of manual handling operations, minimizing contamination risk while the array's integrated design maintains positioning flexibility through its unified structure
Solution Approach 2:
The microneedles are pre-positioned and fixed together in an integrated array before final assembly. This preliminary positioning action eliminates the need for manual handling and adjustment during final assembly, reducing contamination risk while the array design preserves the necessary positioning flexibility for the application
4Ease of repair
If microneedles are individually mounted, then easy replacement is possible, but the risk of breakage during insertion increases
Solution Approach 1:
Multiple microneedles are combined into a single robust integrated array structure that provides mutual support. This merging strengthens the overall structure, reducing the risk of individual microneedle breakage during insertion while the array can still be replaced as a single unit, maintaining ease of repair
Solution Approach 2:
The integrated array structure provides beforehand cushioning and support to individual microneedles during insertion. The rigid array backbone prevents excessive bending forces on individual microneedles, reducing breakage risk before insertion occurs, while the entire array remains replaceable as a single component
Data Source
AI summary
A cosmetic injector includes an accommodation part for accommodating cosmetics; a head part having a flow path through which cosmetics flow; a microneedle part fixed to the head part, and inserted into the skin so as to cause the cosmetics to penetrate the skin; and a pumping part for transferring, to the head part, the cosmetics accommodated in the accommodation part. The head part includes: a first head part for receiving the cosmetics from the pumping part; and a second head part coupled to the upper portion of the first head part, and the microneedle part includes: a microneedle plate provided between the first head part and the second head part; and a plurality of microneedles which extend from the microneedle plate so as to protrude toward the upper surface of the second head part, and which guide, into the skin, the cosmetics discharged from the head part.