Detachable Telescopic Shelf Rail for Full Oven Height Use
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Solution Overview
Problem
Existing household appliances with telescopic pull-out devices lack flexibility and maximum clear height utilization when using both directly inserted shelves and shelves on telescopic pull-out devices, as they often require specialized support frames and do not allow for easy retrofitting or removal.
Innovation Solution
A retrofittable telescopic pull-out device that can be detachably attached to conventional support frames, allowing for the same height usage for both directly inserted and telescopic-supported shelves, with a structurally simple and robust design featuring an angle profile elevation and adaptable fastening mechanisms to prevent operational errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If telescopic pull-out devices are firmly connected to support frames, then structural stability is improved, but flexibility and ease of retrofitting deteriorate
Solution Approach 1:
The telescopic pull-out device is divided into separable components: a support section that attaches to the support frame and a tray support section. This segmentation allows the device to be assembled and disassembled easily while maintaining structural stability when connected, resolving the contradiction between firm connection and ease of retrofitting
Solution Approach 2:
The device transitions from a static firm connection to a dynamic state where it can be easily attached and detached. The fastening mechanism enables the device to adapt its connection state, providing stability during use while allowing quick installation and removal for retrofitting purposes
2Reliability
If telescopic pull-out devices are fixed to shelves, then structural unit stability is improved, but maximum clear height utilization deteriorates
Solution Approach 1:
The device separates the support function from the tray support function. The support section attaches to the support frame at various heights without requiring fixed connection to shelves, allowing shelves to be positioned at optimal heights for maximum clear height utilization while the device provides stable support when needed
3Reliability
If specialized support frames are used, then device stability is improved, but ease of manufacture and retrofitting deteriorates
Solution Approach 1:
The support section is designed with universal attachment capability to conventional support frames using standard fastening mechanisms. This allows the device to be installed on existing frames without requiring specialized frames, maintaining device stability while greatly easing manufacture and retrofitting processes
4Reliability
If guide rods are arranged in pairs, then tray stability is improved, but device complexity increases
Solution Approach 1:
The device combines the support section with integrated fastening mechanisms that work together as a unified system. This merging approach provides effective tray stability through the support frame connection while avoiding the added complexity of separate paired guide rods, maintaining simplicity in the overall device structure
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a telescopic extension device (6) for attachment to a support frame (4) arranged in the treatment chamber (2) of a household appliance, the support frame having at least two spaced-apart vertical posts (10) and at least one pair (12) of vertically spaced guide rods (14, 16) connecting the two posts (10) for guiding a shelf (18) that can be inserted into the treatment chamber (2), wherein the telescopic extension device (6) comprises a retaining rail (22) and a running rail (24, 26) for supporting a shelf (18) that can be extended from the treatment chamber (2) and can be attached to the support frame (4) by means of a fastening device (28, 30) integrally formed or arranged on the retaining rail (22), characterized in that the fastening device (28,30) is designed to create a detachable connection between the retaining rail (22) and the support frame (4), and the guide rail (26) has a projection (38) with a support section (40) for a shelf (18), wherein the projection (38) is arranged on the guide rail (26) such that the support section (40) in the installed position of the telescopic extension device (6) assumes a height position between the top of the lower guide rod (16) and the bottom of the upper guide rod (14).