Card Reader Pulling-Preventing Member with Spring Bias
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Solution Overview
Problem
Conventional card readers with a card pulling-preventing function require high energy consumption due to the need for a solenoid with large output to maintain the card passage closed, making it difficult to meet energy-saving needs.
Innovation Solution
A card reader design that includes a pulling-preventing member urged to a closed position by an urging member, with a turning-regulating member abutting on the pulling-preventing member to regulate its turning, and a solenoid that drives the turning-regulating member, allowing for energy savings by using a smaller output solenoid and preventing card ejection without continuous power application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solenoid with large output is used to maintain the card passage closed, then the card can be prevented from being pulled out, but the energy consumption increases
Solution Approach 1:
The system is divided into two functional parts: an urging member (spring) that provides continuous closing force, and a solenoid that only provides intermittent force to release the lock. This segmentation allows the solenoid to be small and energy-efficient while the spring handles the continuous work of maintaining the closed state.
Solution Approach 2:
The solenoid operates periodically rather than continuously - it is activated only when card insertion is detected to release the locking mechanism, and remains inactive otherwise. This periodic operation dramatically reduces energy consumption compared to continuous solenoid activation.
2Reliability
If a solenoid with large output is used to turn the card locking member, then the card passage can be closed securely, but more current needs to be applied during operation
Solution Approach 1:
The force generation is segmented between the spring (urging member) which provides the main closing force, and the solenoid which only needs to provide enough force to overcome the spring and release the lock. This divides the power requirement, allowing the solenoid to be small and low-current.
Solution Approach 2:
The urging member (spring) acts as an intermediary that stores mechanical energy and provides continuous force, reducing the burden on the solenoid. The solenoid only needs to trigger the release mechanism rather than maintain continuous force.
3Reliability
If the solenoid continuously drives the card locking member to maintain closed position, then the card cannot be pulled out, but energy saving needs cannot be met
Solution Approach 1:
The solenoid is activated periodically only when needed - specifically when card insertion is detected and the locking mechanism needs to be released. During normal operation, the spring maintains the closed state without solenoid power, minimizing energy loss.
Solution Approach 2:
The urging member (spring) serves itself by automatically maintaining the card passage closed without requiring continuous external power. The system uses the mechanical energy stored in the spring to maintain the secure state, eliminating the need for continuous solenoid 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 design achieves energy savings by reducing the current required for the solenoid and preventing card ejection, enabling the use of bus power supplies like USB power, while also protecting the solenoid from excessive force and simplifying the configuration by integrating card insertion detection.
Implementation Method 1
a solenoid which drives the turning-regulating member to a turning-regulating position at which the turning of the pulling-preventing member is regulated and to the turning position at which the turning of the pulling-preventing member is enabled
Implementation Method 2
an urging member for urging the pulling-preventing member to the closed position
Data Source
AI summary
In a card reader having a card pulling-preventing function, provided is a card reader that can achieve energy savings. More specifically, a card reader 1 is equipped with a card moving passage 6 in which a card is moved, a pulling-preventing member 9 which is configured to be capable of turning to a closed position to close the card moving passage 6 and to an open position to open the card moving passage 6 and which prevents the pulling of the card at the closed position, an urging member 10 for urging the pulling-preventing member 9 to the closed position, a turning-regulating member which regulates the turning of the pulling-preventing member 9 by abutting on the pulling-preventing member 9 at the closed position, and a solenoid 12 which moves the turning-regulating member 11 to a turning-regulating position at which the turning of the pulling-preventing member 9 is regulated and to a turning position at which the turning of the pulling-preventing member 9 is enabled.