Smart Card Fingerprint Module Support Structure
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Solution Overview
Problem
Conventional smart cards with fingerprint identifying modules are prone to bending and damage due to the lack of support for the identifying chip, leading to durability issues and loss of identifying function.
Innovation Solution
A smart card design featuring a flexible supporting body, a holding frame with a recess and opening to securely mount the fingerprint identifying module, and a hard supporting board to provide stability, combined with a heat pressing process for assembly, ensuring the module is protected from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the identifying chip is attached directly to the flexible circuit board without supporting elements, then the device complexity is reduced, but the reliability and durability deteriorate as the chip is easily damaged when the card is bent or pressed
Solution Approach 1:
The patent introduces a holding frame as an intermediary component between the flexible circuit board and the identifying chip. This holding frame provides mechanical support and protection to the identifying chip, preventing direct damage from bending or pressing forces while maintaining the overall structure's flexibility and functionality
Solution Approach 2:
The patent divides the supporting structure into separate functional components: the flexible circuit board for electrical connections, the holding frame for mechanical support and positioning, and the identifying chip for fingerprint recognition. This segmentation allows each component to perform its specific function optimally while being independently replaceable or repairable
2Reliability
If a rigid supporting structure is added to protect the identifying chip, then the reliability improves, but the flexibility and ease of operation deteriorate
Solution Approach 1:
The holding frame provides rigid local support only where the identifying chip is positioned, while the rest of the smart card maintains its flexible properties. This localized reinforcement protects the vulnerable chip area without making the entire card rigid, preserving the flexibility needed for insertion and removal in card readers
Solution Approach 2:
The patent combines flexible materials (flexible circuit board, flexible support elements in the holding frame) with rigid materials (protection plate, identifying chip substrate) to create a composite structure. This composite design provides the necessary mechanical protection while maintaining overall flexibility for practical use
Data Source
AI summary
The smart card has a supporting body, a flexible circuit board, a holding frame, a fingerprint identifying module, and a cover sheet. The flexible circuit board is attached to the top of the supporting body and has a data chip. The holding frame is mounted on the flexible circuit board and has a holding recess and an opening. The fingerprint identifying module is mounted in the holding frame and has an identifying chip, a flexible electrical connection sheet, and a hard supporting board to provide a supporting effect to the identifying chip. The cover sheet is attached to the top of the flexible circuit board and has an identifying window. The identifying window is defined through the cover sheet and corresponds to the identifying chip in position to allow the identifying chip to be exposed from the identifying window.