Drawer Door Cable Guidance Structure for Constrained Drag Chain Motion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing drag chain structure in household appliances, such as refrigerators, is complex and prone to mechanical failure due to space limitations, causing the chain to deviate from its intended moving track and reducing the service life of components.
Innovation Solution
A household appliance design featuring a support mechanism with a fixed rail, a cable guiding a chain, and a limiting mechanism that includes a bendable member and a limiting member to guide and limit the chain's movement within a preset error range, ensuring it stays on track and reduces assembly complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a drag chain structure is used to electrically connect the drawer door to the main body, then electrical connectivity is achieved, but the structure becomes complex and assembly time increases
Solution Approach 1:
The drag chain structure is divided into multiple linkages that can flexibly expand and contract. Each linkage is a separate component that connects to others, allowing the cable to be routed through multiple segments rather than requiring a single complex continuous structure. This segmentation simplifies manufacturing and assembly while maintaining electrical connectivity.
Solution Approach 2:
The cable is nested within the drag chain structure, with the cable running through the center of the chain linkages. The drag chain itself is nested within the chamber space, utilizing the available volume efficiently. This nesting approach reduces the overall structural complexity by consolidating multiple functions (electrical connection, cable protection, flexible movement) into a compact integrated assembly.
2Reliability
If a drag chain structure is used in the chamber with space limitations, then electrical connectivity is maintained, but the chain collides with surrounding components and deviates from its moving track
Solution Approach 1:
A limiting mechanism is installed within the chamber to preemptively prevent the drag chain from deviating from its designated moving track. The limiting mechanism includes guide rails or stoppers positioned along the chain's path, creating physical constraints that counteract any tendency of the chain to collide with surrounding components. This preliminary protective action prevents mechanical failure before it occurs.
Solution Approach 2:
The limiting mechanism acts as an intermediary between the drag chain and the chamber walls or surrounding components. Instead of allowing direct contact between the chain and potential collision objects, the limiting mechanism mediates the interaction by providing a controlled guidance path. This intermediary structure absorbs and redirects forces, preventing direct mechanical failure of the chain while maintaining its electrical connectivity function.
3Ease of operation
If the drag chain moves freely in the chamber, then flexibility is maintained, but it deviates from the expected moving track causing mechanical failure
Solution Approach 1:
The drag chain maintains its dynamic flexibility through articulated linkages that can bend and flex as the drawer door opens and closes. However, the limiting mechanism introduces controlled dynamic constraints that guide the chain's movement along a predetermined path. The system dynamically adapts to the drawer's position while ensuring the chain remains within safe operational boundaries, balancing flexibility with reliability.
Solution Approach 2:
The limiting mechanism changes the operational parameters of the drag chain by defining specific geometric constraints on its movement path. The chain is allowed to move within a controlled range of motion determined by the limiting structure's geometry. This parameter control ensures the chain maintains sufficient flexibility for drawer operation while preventing deviations that would lead to mechanical failure or collision with chamber components.
Data Source
AI summary
A household appliance has a main body, a chamber with an opening, and a drawer door closing the chamber. A support mechanism is connected between the drawer door and the main body. A cable extends between the main body and the drawer door and a guidance mechanism guides the cable and moves with the drawer door. The guidance mechanism includes a bendable member that moves along a moving path including a bent portion. A limiting mechanism limits the bendable member to move within the moving path and a preset error range. A structure of a component surrounding the guidance mechanism in the household appliance is improved, so that a moving track of the guidance mechanism can be guided and limited when the guidance mechanism moves as the drawer door moves. This helps the guidance mechanism and the cable move through an expected track.