Offset Detent Wiper Blade Adapter Fastening
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Solution Overview
Problem
Existing wiper blade devices face challenges in securely fastening the spring rail to the wiper blade adapter, leading to potential detachment and instability during operation.
Innovation Solution
The wiper blade device incorporates offset detent means and recesses on both the adapter and spring rail, along with guide grooves and deflection mechanisms, to ensure secure engagement and uniform force distribution, preventing detachment and enhancing stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single detent means is used to fasten the spring rail to the wiper blade adapter, then the device complexity is reduced, but the fastening reliability and stability deteriorate
Solution Approach 1:
The fastening system is segmented into multiple independent detent means (at least two) arranged offset along the wiper blade longitudinal direction, each engaging with corresponding detent recesses in the spring rail. This segmentation distributes the fastening function across multiple points, enhancing overall reliability without creating a single point of failure
Solution Approach 2:
The detent means are arranged in the longitudinal direction of the wiper blade rather than solely in the transverse direction, adding a longitudinal dimension to the fastening system. This dimensional distribution ensures that fastening failures in one location do not compromise the entire connection
2Reliability
If the spring rail is rigidly fixed to prevent any movement, then fastening stability is improved, but the ability to accommodate misalignment and absorb stress deteriorates
Solution Approach 1:
The spring rail incorporates elastic elements that allow controlled movement and deflection during assembly and operation. The detent means engage with detent recesses that permit limited displacement, enabling the system to dynamically adapt to misalignment while maintaining stable fastening through the offset arrangement
Solution Approach 2:
The spring rail's physical parameters (position, orientation) are allowed to change within controlled limits defined by the detent engagement geometry. The offset arrangement of detent means creates a configuration where parameter changes can occur without compromising fastening integrity
3Reliability
If force is concentrated at a single fastening point, then the fastening mechanism is simpler, but uniform force distribution and prevention of inadvertent detachment deteriorate
Solution Approach 1:
The fastening force is segmented into multiple application points through the offset detent means arrangement. Each detent means applies force at a different location along the spring rail, creating a distributed force system that prevents concentration at any single point
Solution Approach 2:
Each detent means is locally optimized to engage with its corresponding detent recess, creating localized force application zones. The offset arrangement ensures these local force applications combine to produce uniform overall force distribution across the fastening interface
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
This configuration provides a secure and stable fastening of the spring rail, reducing the risk of detachment and improving wiping performance by ensuring uniform force distribution and secure locking.
Implementation Method 1
a detent means is to be understood in particular to mean a resiliently elastic means for producing a detent connection, which means is provided for being deflected elastically out of an initial position during an assembly process
Implementation Method 2
which element in particular generates an opposing force which is dependent on a variation of the extent and which is preferably proportional to the variation and which counteracts the variation
Data Source
AI summary
The invention relates to a wiper blade device, comprising a wiper blade adapter (10; 10a; 10b), which has at least two locking means (12; 12a; 12b, 14; 14a; 14b), which are arranged at an offset from each other in a wiper blade longitudinal direction (16; 16a; 16b), and comprising at least one spring rail (18; 18a; 18b), which has at least two locking cut-outs (20; 20a; 20b, 22; 22a; 22b), which are arranged at an offset from each other in the wiper blade longitudinal direction (16; 16a; 16b), wherein the at least two locking means (12; 12a; 12b, 14; 14a; 14b) are provided for engaging in the at least two locking cut-outs (20; 20a; 20b, 22; 22a; 22b) of the at least one spring rail (18; 18a; 18b) in an assembled state.