Manual Waste Compactor Lever Mechanism
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Solution Overview
Problem
Current methods for compacting household waste in domestic trash cans are impractical, as they require manual hand compaction, which can lead to hand contamination and injury, and are not feasible for certain types of waste like glass, due to the need for physical effort and risk of unbalancing the compaction device.
Innovation Solution
A device with a frame, lateral uprights, and hand-operated levers that generate downward thrust to compact waste using a compression plate, distributing effort evenly and preventing unbalancing, allowing for efficient compaction without manual hand contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual hand compaction is used to compact waste in domestic trashcans, then the internal volume of plastic bags can be optimized, but the user risks hand contamination and injury
Solution Approach 1:
The patent introduces a compression plate as an intermediary tool between the user's hand and the waste. The compression plate is lowered via a lever mechanism to apply compaction force to the waste, while the user's hand never contacts the waste directly, thus eliminating hand contamination and injury risks while maintaining compaction efficiency
Solution Approach 2:
The patent replaces the direct manual mechanical compaction (hand pressing) with a lever-based mechanical system. The lever amplifies the user's input force and transmits it through a thrust bar to the compression plate, substituting the direct hand-waste contact mechanism with an indirect mechanical transmission system that provides both force multiplication and safety
2Productivity
If hand compaction is used on certain types of waste like glass, then compaction can be achieved, but the operation becomes infeasible due to safety risks
Solution Approach 1:
The compression plate serves as a protective intermediary that allows compaction of hazardous materials like glass without direct user contact. The plate absorbs and distributes the compaction force while keeping the user's hand isolated from sharp or dangerous waste materials, making the operation reliable and feasible
Solution Approach 2:
The patent segments the compaction function into distinct components: the user operates the lever, which transmits force through a thrust bar to the compression plate, which then contacts the waste. This segmentation isolates the user from direct waste contact while maintaining compaction capability for all waste types including glass
3Device complexity
If a simple manual compaction method is used, then the device structure remains simple, but the compaction force is insufficient and unbalanced
Solution Approach 1:
The patent employs a dynamic lever mechanism that converts a small input force applied by the user into a large output force on the compression plate. The lever rotates about a pivot point, creating mechanical advantage that amplifies the compaction force dynamically during the compaction stroke, providing sufficient force while maintaining relatively simple device structure
Solution Approach 2:
The lever mechanism inherently balances forces through its pivot point and symmetric design. The structure distributes the compaction load evenly, preventing unbalancing of the device while delivering sufficient compaction force through the thrust bar and compression plate
4Device complexity
If the compression plate is directly connected to the lever, then the structure is simpler, but the plate cannot remain aligned with the container during compaction
Solution Approach 1:
The thrust bar serves as an intermediary component between the lever and the compression plate. It translates the rotational motion of the lever into linear vertical motion of the compression plate, ensuring the plate remains aligned with the container throughout the compaction stroke while adding only minimal structural complexity
Solution Approach 2:
The connection between the lever and thrust bar allows for dynamic adjustment during operation. The thrust bar moves linearly while the lever rotates, creating a dynamic mechanism that maintains proper alignment of the compression plate with the container regardless of the lever's angular position, ensuring stable and accurate compaction
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 effective and balanced compaction of waste in containers, reducing the risk of hand contamination and injury, and making it feasible for various types of waste, including glass, by distributing the effort and maintaining alignment of the compression plate.
Implementation Method 1
two levers that can be operated by hand, namely a left-hand lever fixed pivotingly to the left-hand lateral upright about a left-hand axis of pivoting and a right-hand lever fixed pivotingly to the right-hand lateral upright about a right-hand axis of pivoting
Implementation Method 2
the effort provided by the user at the time of compaction is spread equally between the left-hand and right-hand lateral uprights
Implementation Method 3
a compression plate, said thrust bar being connected to said left-hand and/or right-hand lever by means of at least one connecting means able to slide along said left-hand and/or right-hand lever and configured to act on said thrust bar under the action of said left-hand and/or right-hand lever so as to move it toward the ground
Data Source
AI summary
A device for manually compacting waste, including a support plate and left-hand and right-hand lateral uprights secured to the support plate and delimiting a central space to accept a waste container. The device also includes a left-hand lever fixed pivotingly to the left-hand lateral upright about a pivot axis, and a right-hand lever fixed pivotingly to the right-hand lateral upright about a pivot axis, with the pivot axes arranged parallel to one another. The device further includes a thrust bar having a lower end fixed to a compression plate and connected to the left-hand and/or right-hand lever by a connector capable of sliding along the left-hand and/or right-hand lever to act on the thrust bar under lever action so as to move toward/away from the ground to allow the compression plate to be brought closer to and respectively further away from the support plate from a position of equilibrium.