Windscreen Wiper Frame Snap-Fit Assembly
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Solution Overview
Problem
Current hybrid windscreen wiper devices face challenges in efficiently and cost-effectively coupling their multiple components to ensure a secure and permanent connection during vehicle operation, which is time-consuming and costly.
Innovation Solution
A windscreen wiper device with a frame structure featuring a resilient tab and recess mechanism that provides a strong, irreversible connection between components, allowing for quick and low-cost assembly by snapping the elongated member into the opening, ensuring the components remain engaged during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional pin-based coupling methods are used to connect frame structure components, then the components can be assembled, but the assembly process is time-consuming and costly
Solution Approach 1:
The frame structure is divided into multiple components (main bridge, end piece sub-assemblies, connecting pieces) that can be manufactured separately and then quickly assembled using the resilient tab and recess coupling mechanism, enabling modular production and rapid assembly
Solution Approach 2:
The resilient tab automatically snaps into the recess to secure components together during assembly, and the same resilient tab provides audible notification when proper connection is achieved, eliminating the need for separate verification steps
2Reliability
If conventional pin-based coupling methods are used to connect frame structure components, then the components can be assembled, but the connection may come apart during operation
Solution Approach 1:
The resilient tab is pre-formed on the connecting piece before assembly, and the recess is pre-formed on the main bridge, allowing for quick snap-fit assembly without requiring time-consuming alignment or fastening operations
Solution Approach 2:
The resilient tab is designed as a simple, inexpensive feature integrated into the connecting piece that provides reliable connection through elastic deformation, replacing complex permanent fastening mechanisms
3Strength
If deformed pins are used to establish permanent pivoting relationships between components, then the connection is strong, but the assembly process becomes complex and costly
Solution Approach 1:
The connecting piece is made from resilient material that can elastically deform during assembly to engage the recess, then maintains a strong permanent connection through material elasticity rather than mechanical deformation of fasteners
Solution Approach 2:
The complex mechanical pin deformation process is replaced with a simpler elastic snap-fit mechanism where the resilient tab naturally engages the recess through elastic deformation, eliminating the need for specialized deformation tools and processes
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 solution ensures a secure, irreversible connection between components, preventing detachment during vehicle operation while simplifying and reducing the cost of assembly, thereby enhancing the durability and reliability of the wiper device.
Implementation Method 1
Either the elongated member or a wall of the opening presents a resilient tab and the other presents a recess shaped to receive the resilient tab. The elongated member is disposed in the opening with the resilient tab being received within the recess to interconnect the pieces.
Data Source
AI summary
A windscreen wiper device for cleaning a windshield of a vehicle is provided. The windscreen wiper device includes a wiper strip for sealing against the windshield and at least one carrier element engaged with the wiper strip to bias the wiper strip into a predetermined configuration. A frame structure is coupled to the at least one carrier element and includes at least two components. One of the components presents an elongated member with a resilient tab, and another component includes a longitudinally extending opening. One of the walls of the opening has a recess shaped similarly to the resilient tab. The elongated member is inserted into the opening until the resilient tab snaps into the opening to interconnect the components.