Wiper Blade Locking Device with Spine Recess and Push Button
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Solution Overview
Problem
Existing locking devices for windscreen wiper blades with a drive arm fixed at the median point are not effectively addressed by prior solutions, as they are not suitable for flat blade type windscreen wipers, which lack a framework connected to the ends of the support frame, requiring a cost-effective, easily replaceable, and less bulky locking mechanism.
Innovation Solution
A locking device comprising a top part that cooperates with the blade holder and a bottom part in direct contact with the window, featuring an inner recess for the spine of the windscreen wiper, with blocking means like teeth or a hook, and a push button for separation, made from metal for secure attachment and easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a locking device with tabs and hooks is used for traditional framework wipers, then the support frame is securely locked, but the device cannot be applied to flat blade type wipers with a single median connection point
Solution Approach 1:
The locking device is divided into separate functional elements: a linking means with an inner recess for the spine, and a locking device with blocking means (teeth or hooks). This segmentation allows the locking mechanism to be adapted to different wiper types by configuring the blocking means to engage with either framework ends or the top part of flat blade wipers, while the linking means remains consistent.
Solution Approach 2:
The locking device is designed with multi-functionality to work with both traditional framework wipers and flat blade type wipers. The blocking means can be configured as teeth that engage with framework ends or as hooks that engage with the top part of flat blade wipers, making the same basic structure universally applicable to different wiper architectures.
2Reliability
If a bulky locking device is used to ensure secure connection, then reliability is improved, but the aesthetic appearance and ease of replacement are compromised
Solution Approach 1:
The locking device incorporates dynamic elements such as flexible locking tabs that can deflect during installation and locking, and push buttons that enable easy release. The blocking means (teeth or hooks) are designed to engage securely during operation but can be quickly released by actuating the push buttons, providing both reliability and ease of replacement.
Solution Approach 2:
The locking device is designed to be self-l locking through the engagement of blocking means with the spine or blade structure. Once installed, the blocking means automatically secure the connection without requiring additional fastening steps, and the push buttons provide self-contained release functionality for easy blade replacement.
3Reliability
If traditional locking mechanisms are used, then connection is ensured, but the cost of manufacture and replacement is higher
Solution Approach 1:
The locking device utilizes thin, flexible locking tabs and streamlined blocking means that can be manufactured using cost-effective processes such as stamping or injection molding. These thin-walled components provide sufficient mechanical strength for secure locking while minimizing material usage and manufacturing complexity, reducing production costs compared to traditional bulky locking mechanisms.
Data Source
AI summary
The present invention relates to a locking device (14, 45, 52, 56, 66) between a windscreen wiper blade holder (2) and a windscreen wiper blade (13), said blade (13) consisting of a top part (15) that is capable of cooperating with said blade holder (2) and a bottom part (16) in direct contact with the windscreen or window to be wiped, said device (14, 45, 52, 56, 66) having a shape that complements said top part (15) of said blade (13), characterized in that it is capable of being solidly attached to linking means (29), said linking means (29) connecting one of the ends of said blade holder (2) to one of the ends of said blade (13).