Card Reader Pull-Out Prevention Member with Metal Abutting Tip
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Solution Overview
Problem
Conventional card readers with resin pulling-out prevention members are prone to damage when handling metal cards, leading to functional disorders and difficulty in card insertion and pulling-out operations.
Innovation Solution
A card reader design featuring a pulling-out prevention member with a resin main body and a metal card abutting member that can turn with the card's width direction, preventing damage and weight increase, and allowing for easy replacement of the card abutting member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the pulling-out prevention member is made of metal to prevent damage when handling metal cards, then the strength and durability are improved, but the weight increases making turning control difficult
Solution Approach 1:
The pulling-out prevention member is divided into two distinct parts: a resin main body and a separate metal card abutting member. This segmentation allows each component to be made from materials optimized for its specific function - the resin provides lightweight structure while the metal portion provides durability for card contact.
Solution Approach 2:
The pulling-out prevention member uses a composite construction combining resin and metal materials. The main body is made of resin for lightweight properties, while the card abutting member is made of metal for strength and damage resistance, creating a hybrid structure that balances weight and durability.
2Reliability
If the pulling-out prevention member is made of metal to prevent damage, then the reliability is improved, but the manufacturing cost increases
Solution Approach 1:
By segmenting the pulling-out prevention member into resin and metal parts, the design allows selective application of expensive metal material only where needed for reliability (the card abutting member), rather than using metal throughout the entire component, thus reducing overall manufacturing cost.
Solution Approach 2:
The metal card abutting member is applied locally only at the specific location where card contact occurs, providing enhanced reliability precisely where needed, while the rest of the component uses cost-effective resin material.
3Ease of operation
If the card abutting member has a narrow width toward the rear side to enable turning, then the ease of operation is improved, but the structural stability deteriorates
Solution Approach 1:
The card abutting member is designed with variable width that creates a natural turning mechanism - the narrow rear end allows the member to rotate easily when a card is inserted, while the wider front portion maintains structural stability during operation.
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 solution effectively prevents damage to the pulling-out prevention member when metal cards are inserted or pulled out, maintaining normal card reader functions and reducing weight and manufacturing costs.
Implementation Method 1
a torsion coil spring which urges the lever member toward the closing position
Implementation Method 2
a solenoid which moves the restriction pin between a turning restriction position where turning of the lever member is restricted and a turnable position where the lever member is capable of turning
Data Source
AI summary
A card reader includes a pulling-out prevention member turnable between a closing position where a card moving passage is closed and an open position and preventing pulling-out of a card having been inserted into a card reader at the closing position. The pulling-out prevention member is provided with a main body member and a card abutting member which closes the card moving passage when the pulling-out prevention member is located at the closing position. A rear end of the card abutting member is capable of contacting with a front end of the card having been inserted into the card reader when the pulling-out prevention member is located at the closing position. The main body member of the pulling-out prevention member is formed of resin, and the card abutting member is formed of material having a strength higher than a strength of the resin.