Card Reader Protective Mechanism for Dust and Liquid Ingress
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Solution Overview
Problem
Conventional card readers are prone to damage from extraneous materials like dust, liquids, and chippings entering through the inserting slot, which can lead to reduced usage life and difficulty in replacing the protective mechanism.
Innovation Solution
A card reader design featuring an upper and lower shell with a protective mechanism that includes a protective shell and a dustproof sheet, which prevents extraneous materials from entering and allows for easy replacement of the dustproof sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional card reader has a larger inserting slot, then card insertion is easier, but extraneous materials including dusts, liquids or chippings are easily to enter the card reader from the inserting slot
Solution Approach 1:
The inserting slot is divided into two segments: a first inserting slot in the base body and a second inserting slot in the IC card holder. The sealing element is disposed between these two slots, creating a segmented protection structure that maintains ease of card insertion while preventing extraneous materials from entering the electronic components.
Solution Approach 2:
A sealing element acts as an intermediary component between the first inserting slot and the second inserting slot. This sealing element blocks extraneous materials from passing through to the electronic components while still allowing cards to pass through when needed.
2Device complexity
If the upper sealing part and lower sealing part are disposed to an inner wall of a front shell, then the sealing structure is compact, but after long time use the sealing parts are deformed and difficult to change
Solution Approach 1:
The sealing element is segmented into an upper sealing part and a lower sealing part that can be separately replaced. The IC card holder can be detached from the base body, allowing easy access to and replacement of the sealing element without replacing the entire assembly.
Solution Approach 2:
The sealing element is designed as a consumable component that can be easily discarded after a certain period of use and replaced with a new one. The detachable IC card holder allows users to replace the sealing element without discarding the entire card reader assembly.
3Device complexity
If the electronic component is disposed adjacent to the third inserting slot, then the card reader structure is compact, but the card and sealing element easily collide with the electronic component to cause damage
Solution Approach 1:
The electronic component is extracted from the immediate vicinity of the inserting slot and repositioned within the IC card holder, away from the path of the card and sealing element. This separation prevents collisions between the card, sealing element, and electronic component while maintaining a compact overall structure.
Data Source
AI summary
A card reader with a protective mechanism includes an upper shell, a lower shell, a protective mechanism and a circuit board assembly. An upper portion of a front end of the upper shell slantwise extends downward and rearward, and then is bent rearward to form an upper extending portion. A lower portion of the front end of the upper shell extends rearward to form a lower extending portion. The upper extending portion is spaced from the lower extending portion to form an inserting passageway between the upper extending portion and the lower extending portion. The lower shell is mounted to a bottom surface of the upper shell. The protective mechanism is disposed between the upper shell and the lower shell. The circuit board assembly is disposed between the upper shell and the lower shell.