Washer-Dryer Side Wall Snap-Fit Assembly for Transport Stability
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Solution Overview
Problem
Existing washer/dryer assembly methods using screws are labor-intensive, prone to damage during assembly and disassembly, and vulnerable to deformation and metal tears due to transportation forces.
Innovation Solution
A washer/dryer design featuring a skirt and extension system where the side wall is secured to the base using protrusions and recesses, with a flange and collar mechanism to prevent movement, allowing for easy assembly and secure attachment, and produced from a combination of plastic and sheet metal materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws are used to fasten the outer cabinet walls, then the assembly is secure and resistant to transportation forces, but the assembly process is labor-intensive and time-consuming
Solution Approach 1:
The patent replaces the screw-based mechanical fastening system with a snap-fit system using protrusions and recesses. The protrusions on the base engage with corresponding recesses in the side walls, allowing walls to be attached by simple pushing motions without tools, thereby dramatically increasing assembly speed while maintaining structural integrity through the interlocking geometry of the protrusion-recess pairs
2Strength
If screws are used to fasten the outer cabinet walls, then the connection is strong, but the walls are damaged during unscrewing and re-screwing for maintenance
Solution Approach 1:
The screw fastening system is replaced with a snap-fit system where walls can be detached by pulling outward to disengage the protrusions from recesses. This eliminates the damaging effects of unscrewing operations on the cabinet walls while maintaining strong connections during normal operation, and allows easy access for maintenance without tool requirements
Solution Approach 2:
The connection system transitions from a static screw-fastened state to a dynamic snap-fit system that allows easy transition between assembled and disassembled states. The protrusion-recess design provides a stable connected state during operation but enables simple detachment by overcoming the snap-fit engagement, facilitating maintenance without wall damage
3Productivity
If protrusions and recesses are used for assembly, then the assembly is quick and tool-free, but the connection may be weaker under heavy transportation forces
Solution Approach 1:
The patent combines multiple protrusions and recesses at different locations on each side wall to create a distributed locking system. This merging of multiple connection points distributes the transportation forces across several engagement points, significantly enhancing the overall connection reliability while maintaining the tool-free snap-fit assembly advantage
Solution Approach 2:
The protrusions are designed with complex three-dimensional geometries that engage with recesses in multiple directions. The interlocking features extend in multiple dimensions, creating a robust connection that resists forces from various directions during transportation while still allowing simple linear insertion during assembly
Data Source
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AI summary
The present invention relates to a washer/dryer (1) comprising two side walls (2) covering the volume from sides wherein the drum, in which the laundry is placed, and other machine elements are located, a front wall (3) covering the said volume front the front, a base (4) that supports the side walls (2) and other machine elements from below and a skirt (5) that extends into the body at the lower edge of the side wall (2) and perpendicularly to the side wall (2).