Wiper Blade Connection Slider Locking Mechanism
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Solution Overview
Problem
Existing windscreen wiper connection arrangements often experience unintended movement of the slider into the assembly position, leading to insecure fixing of the wiper blade to the wiper arm, which can result in self-release during operation.
Innovation Solution
Incorporation of a securing element that prevents slider movement into the assembly position during normal operation but allows it during specific pivot angles, ensuring secure attachment and easy disassembly for blade replacement, utilizing a projection or stop mechanism to lock the slider in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a slider is used to secure the connection element to the wiper arm, then easy assembly and disassembly is enabled, but the slider may move unintentionally into the assembly position during operation
Solution Approach 1:
A securing element acts as an intermediary component between the slider and the connection element. This securing element engages with both the slider and the connection element to prevent unintended movement of the slider into the assembly position during operation, while allowing intentional movement during blade replacement. The securing element thus mediates between the need for secure operation and easy disassembly.
2Ease of operation
If the slider is allowed to move freely for easy blade replacement, then operation is simplified, but the connection may become insecure during wiping operation
Solution Approach 1:
The securing element transitions between different engagement states dynamically. During normal wiping operation, the securing element engages with the connection element to lock the slider in place, providing stable connection. During blade replacement, when the connection element is removed, the securing element disengages automatically, allowing the slider to move freely into the assembly position. This dynamic behavior adapts the system's stability characteristics to the operational context.
3Ease of operation
If external forces are applied to move the slider, then assembly/disassembly can be performed, but unintentional application of force may cause self-release
Solution Approach 1:
The securing element applies a preliminary counteracting force to prevent the slider from moving into the assembly position during normal operation. It is positioned and configured to oppose any unintended forces that might cause self-release. However, when intentional forces are applied during blade replacement, the securing element's engagement is overcome, allowing the slider to move as intended.
Data Source
AI summary
A connection arrangement to connect a wiper blade to a wiper arm is disclosed. A connection element includes an upper part formed to fasten the connection element to the wiper arm, on which upper part a lower part formed to hold a basic body of the wiper blade is mounted to be pivotable around a rotational axis. A slider encloses the wiper arm in an end region, where the slider is able to move along the wiper arm from an assembly position into a functional position securing the connection element. A securing element prevents a movement of the slider into the assembly position during a pivot movement of the lower part around the rotational axis by a first value and allows the movement of the slider into the assembly position if the lower part is pivoted by a second value which is greater than the first value.