Pullout shelf
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Solution Overview
Problem
Existing retail shelving systems make it difficult to access merchandise located at the rear of the shelf due to the presence of adjacent upper shelves, especially for products with heights similar to the vertical spacing between shelves.
Innovation Solution
A pullout shelf assembly with an adjustable length support arm and a latch arrangement, allowing the shelf to be extended and retracted, thereby improving access to rear merchandise without the need for external force to disengage the latch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If vertically spaced shelves are used in retail shelving systems, then the shelving structure is compact and space-efficient, but it becomes difficult to access merchandise at the rear of the shelf due to adjacent upper shelves blocking access
Solution Approach 1:
The patent applies the dynamics principle by making the shelf movable rather than fixed. The pullout shelf can extend forward along guide rails to bring rear merchandise within reaching distance, then retract to its original position when not in use. This dynamic movement capability allows the shelf to transition between a compact state (when not needed) and an extended state (when access is required), thereby resolving the contradiction between space efficiency and accessibility.
2Ease of operation
If a pullout shelf mechanism is added to enable shelf extension, then accessibility to rear merchandise is improved, but the device complexity increases due to additional components like support arms and latch arrangements
Solution Approach 1:
The patent applies segmentation by dividing the pullout shelf into distinct functional modules: the shelf body, adjustable support arms with telescopic sections, guide rails, and latch mechanisms. Each module performs a specific function and can be independently adjusted or maintained. This modular segmentation reduces overall system complexity by making each component simpler and more standardized, while still achieving the goal of improved accessibility.
Solution Approach 2:
The latch mechanism is designed to be automatically engaged when the shelf is extended to its desired position, eliminating the need for manual locking operations. The gravity-assisted or spring-loaded latch system self-activates based on the shelf's position, reducing the operational complexity for the user while maintaining secure positioning.
3Adaptability or versatility
If the support arm length is made adjustable to accommodate different shelf positions, then versatility and adaptability are improved, but the device complexity increases due to additional adjustment mechanisms
Solution Approach 1:
The support arm employs a telescopic design where one arm section is nested within another, allowing for adjustable length without requiring complex external adjustment mechanisms. The nested sections can be locked at various positions using simple latch features, providing versatile length adjustment while maintaining a compact and relatively simple overall structure.
Data Source
AI summary
A pullout shelf assembly for a retail merchandise display including a shelf, an adjustable length support arm and a latch arrangement is provided. The shelf has a product support surface. The first adjustable length support arm has first and second arm members movable relative to one another between a retracted position and a first extended position. The shelf moves with the second arm member. The latch arrangement has a first catch associated the retracted position and a second catch associated with the first extended position. A latch bolt secures the second arm member in the retracted position when engaged with the first catch and secures the second arm member in the first extended position when engaged with the second catch. The handle operably actuates the latch bolt out of engagement with the first and second catches to permit movement of the second arm member relative to the first arm member.