Entry Exit Detection Locking Device With Card Reader Integration
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Solution Overview
Problem
Traditional doorway access control systems do not include a mechanism for controlling both entry and exit of people, limiting their functionality and intelligence in managing access.
Innovation Solution
An entry/exit detection locking device with a knob axle, engaging and holding unit, and detection unit, connected through a control circuit to card readers, allowing for the detection and recording of entry and exit events and enabling unlocking via card swiping, ensuring intelligent doorway access control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional locking devices are used with key-based unlocking, then the structure remains simple, but the device cannot achieve intelligent access control or record entry/exit events
Solution Approach 1:
The locking device is designed to perform multiple functions: it can control both entry and exit of persons, detect rotation direction of the knob axle, record entry/exit events, and interface with card readers for access control. The detection unit with first and second micro switches enables the single device to detect both clockwise and counter-clockwise rotations, making it universally applicable for bidirectional access control without requiring separate detection mechanisms for each direction.
Solution Approach 2:
The detection unit is nested within the locking device structure, with the base integrated into the housing and micro switches positioned within receiving troughs. The shaft with wing-shaped spring plates is nested within the base, creating a compact hierarchical structure. This nesting approach allows the detection functionality to be incorporated into the existing locking device without significantly increasing external dimensions or structural complexity.
2Adaptability or versatility
If a locking device is designed to control both entry and exit, then access control functionality is improved, but the device requires more complex detection and control mechanisms
Solution Approach 1:
The detection mechanism is segmented into two independent detection paths: a first micro switch for detecting one rotation direction (e.g., entry) and a second micro switch for detecting the opposite rotation direction (e.g., exit). This segmentation allows each micro switch to be optimized for its specific detection function while working together to provide comprehensive entry/exit control. The control circuit separately processes signals from both micro switches to determine the appropriate access control action.
Solution Approach 2:
The wing-shaped spring plates are designed to be flexible and movable, allowing them to dynamically respond to the rotation direction of the knob axle. When the knob axle rotates clockwise, one wing-shaped spring plate deflects to trigger its corresponding micro switch; when rotated counter-clockwise, the other wing-shaped spring plate deflects to trigger its micro switch. This dynamic response mechanism enables the device to automatically adapt to different rotation directions without requiring complex mechanical linkages or multiple fixed sensors.
3Extent of automation
If card reader integration is added for intelligent access control, then access management capability is enhanced, but the device complexity and cost increase
Solution Approach 1:
The system is designed to be self-sufficient by integrating the detection unit directly into the locking device, eliminating the need for separate external sensors or additional control units. The detection unit automatically detects knob axle rotation and generates signals that the control circuit processes locally to determine whether to unlock for entry or exit. This self-service approach reduces the need for complex external wiring and additional control components, simplifying the overall system architecture while maintaining automated access control functionality.
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
Enables comprehensive access control by recording and managing both entry and exit events, enhancing the functionality of locking devices with intelligent access management.
Implementation Method 1
The bracket is connected to a solenoid valve. The solenoid valve is connected through a control circuit to card readers installed at an indoor side and an outdoor side. When the card readers detect a correct card swiping signal, the control circuit drives the solenoid valve to pull the engaging bar backward to disengage from the notch of the inner rotary axle or the notch of the outer rotary axle.
Implementation Method 2
The base is formed with two receiving troughs to respectively receive a first micro switch and a second micro switch therein... When a person attempts to exit or enter by rotating the knob axle, the detection unit is triggered to make a record of the exit or entry
Data Source
AI summary
An entry/exit detection locking device includes a knob axle of a lock and an engaging and holding unit and a retention unit. The knob axle includes upper and lower rotary axles each formed with a notch. The engaging and holding unit is arranged at one side of the knob axle. The retention unit is arranged below the knob axle. The retention unit is connected through a control circuit to a card reader at an outdoor side. Through adjustment, the engaging and holding unit is set in engagement with the notch of the upper rotary axle or the notch of the lower rotary axle to achieve a locked state for exit or entry. Rotating the knob axle for entry or exit triggers the retention unit to make a record of the exit or entry. The engaging and holding unit is connected to the card reader to enable unlocking through card swiping.