Pedal-Actuated Mechanical Locking Mechanism for Tamper-Resistant Waste Bins
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Solution Overview
Problem
Current waste collection systems in urban areas are vulnerable to tampering and malfunction, particularly when users attempt to open the access mouth before completing identification, and they require significant energy to operate autonomously.
Innovation Solution
A controlled waste conferment device featuring a mechanical locking mechanism with a cam element, coupling assembly, and elastic members that securely inhibit fraudulent access while minimizing energy consumption, allowing efficient operation even with inexperienced user interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a locking mechanism with gaps between movable parts is used, then the device can be operated manually by users, but the device becomes vulnerable to tampering with flexible laminar elements
Solution Approach 1:
The patent applies this principle in reverse - it prevents the insertion of flexible laminar elements (tampering tools) by eliminating gaps where such elements could be introduced. The coupling assembly is designed with interlocking surfaces that leave no openings for flexible elements to penetrate, while still allowing legitimate manual operation through the pedal actuator.
Solution Approach 2:
The locking mechanism is divided into separate functional components: a coupling assembly for secure engagement, a pedal actuator for manual operation, and a locking member for securing the hatch. This segmentation allows each component to be optimized for its specific function while working together as a secure system.
2Ease of operation
If the mechanical locking components are positioned close to the conferment opening for easy access, then users can easily operate the mechanism, but the device becomes vulnerable to fraudulent unlocking attempts
Solution Approach 1:
The pedal actuator serves as an intermediary between the user and the locking mechanism. Users operate the pedal from outside the confined space, which transmits force through a linkage to the locking member. This intermediary position allows easy user access while keeping the critical coupling assembly protected and inaccessible for tampering.
3Adaptability or versatility
If autonomous battery power units with photovoltaic panels are used, then the device can operate without electrical network connection, but energy consumption of electromechanical systems must be minimized
Solution Approach 1:
The locking mechanism is designed to be predominantly mechanical, using the user's manual input force on the pedal to drive the locking and unlocking actions. This self-service approach eliminates the need for powered actuators, motors, or control systems, thereby minimizing energy consumption while maintaining autonomous operation capability through battery and photovoltaic systems.
Solution Approach 2:
The patent replaces electromechanical actuation systems with a purely mechanical linkage system. The pedal actuator converts user foot pressure into rotational motion of the locking member through mechanical linkages, eliminating the need for electric motors, solenoids, or complex control electronics that would consume battery power.
4Reliability
If the locking mechanism uses complex electromechanical components for controlled unlocking, then identification and monitoring can be implemented, but the device becomes more vulnerable to malfunction and requires more energy
Solution Approach 1:
The patent extracts the electromechanical components from the locking mechanism itself, separating the identification/monitoring functions (which can remain electronic) from the physical locking action (which is purely mechanical). The coupling assembly and pedal actuator are designed as simple mechanical components that are inherently reliable and resistant to malfunction, while electronic systems handle only the identification and control signaling.
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 device effectively prevents tampering and ensures reliable operation with reduced energy expenditure, maintaining secure and efficient waste collection processes.
Implementation Method 1
a cam element (25) operable to operate on the locking member (27) and on the coupling element (17)
Implementation Method 2
at least one elastic member (35) operable on the coupling element (17) to counteract the movement of the cam element (25) towards the operating condition
Data Source
Figure 1
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Figure 3
AI summary
A locking mechanism (12) comprises a mechanical stop (13) and a coupling assembly (14) respectively fixed to a fixed part (6) and to a movable part (8). A coupling element (17) is movable between a work position in which it interferes with the mechanical stop (13) to inhibit the translation of the movable part (8), and a release position in which it does not interfere with the mechanical stop (13). A locking member (27) oscillatingly carried by the coupling element (17) is movable between an activation position in which it interferes with an auxiliary stop (29) to inhibit the translation of the coupling element (17), and an unlocked position in which it frees the translation of the coupling element (17). An actuator (26) operates on a cam element (25) to move it between a rest condition in which the locking member (27) is retained in the activation position and an operating condition in which the locking member (27) is in the unlocked position and the coupling element (17) is in the release position.