Display Tray Pusher Paddle Locking for Intentional Reloading
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Solution Overview
Problem
Existing merchandise display tray mechanisms for spring-operated pusher paddles are either costly, complex, or prone to accidental locking, leading to inefficiencies in reloading operations and potential malfunction.
Innovation Solution
A novel locking mechanism featuring a pivotally secured locking element with an actuating arm and locking leg, combined with a coiled strip spring, allows manual locking and automatic release of the pusher paddle during reloading, ensuring intentional operator action and simplified assembly/disassembly of the pusher paddle on guide rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a locking mechanism is provided to hold the pusher paddle in a retracted position during reloading, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is integrated with the pusher paddle assembly by pivotally mounting the locking element to the paddle itself. The locking leg engages with the tray base while the actuating arm is pressed by the spring, combining locking, springing, and actuation functions into a unified structure that reduces overall device complexity while maintaining ease of operation.
Solution Approach 2:
The locking mechanism automatically engages when the pusher paddle is in the retracted position without requiring manual intervention. The spring constantly urges the actuating arm to press the locking leg against the tray base, creating a self-activating lock that simplifies operation while minimizing additional mechanical components.
2Reliability
If a vertically movable latch element is used to lock the paddle, then the reliability of locking is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
Instead of using a vertically movable latch element that requires complex actuation mechanisms, the invention inverts the approach by using a pivotally mounted locking element where the spring directly presses the actuating arm to engage the locking leg. This inverted mechanism achieves reliable locking with simpler construction and lower manufacturing costs.
3Ease of operation
If the locking mechanism automatically engages when the paddle is retracted, then the ease of operation is improved, but the reliability decreases due to accidental locking
Solution Approach 1:
The spring is pre-loaded to constantly urge the actuating arm into the locking position, but the locking element is designed to require intentional manual retraction of the paddle to engage. This preliminary positioning of the spring ensures that locking only occurs when the paddle is deliberately moved to the retracted position, preventing accidental locking while maintaining ease of 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 mechanism ensures the pusher paddle remains securely locked during reloading operations without additional springs, reducing operational complexity and costs, while ensuring the paddle automatically returns to its forward position upon completion, maintaining product display functionality.
Implementation Method 1
a coiled body portion (36) positioned behind and bearing forwardly upon the product pusher (34), and a strip portion (36a) extending forwardly in the tray and being anchored at the front of the tray
Data Source
AI summary
A product display tray, which is provided with a spring-actuated pusher paddle for urging a column of products forwardly in a display as items are removed from the front of the tray, includes a manually operated locking element pivotally attached to the pusher paddle and normally held in a “release” position by the action of the pusher spring. When the paddle is in a fully retracted position, for reloading of the tray, the locking element is manually pivoted into a locking position to engage the tray structure and retain the paddle in its retracted position during loading operations. A slight backward push on the paddle, when reloading has been completed, releases the paddle for forward movement by the spring. The device also includes special features on the pusher paddle to facilitate and simplify its slideable assembly with, and stable retention on, longitudinal guide rods on which the paddle slides.