Rotary Securing Element for Tool-Free Windscreen Wiper Fastening
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Solution Overview
Problem
Existing windscreen wiper devices face challenges such as increased production and material costs, wear-related impairment of wiping quality, and complexity in replacement due to traditional screwed connections, especially under varying climatic conditions and exposure to washing systems.
Innovation Solution
A fastening device with a receiving region and a rotatably mounted securing element that forms a force or form fit with the vehicle's fastening element, allowing for easy mounting and dismounting without tools, enabling secure engagement and simple replacement of wiper blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional screwed connections are used to fasten the windscreen wiper device, then the connection strength and reliability are improved, but the ease of replacement and device complexity worsen
Solution Approach 1:
The fastening device is divided into separate components: a fastening body and a securing element. The securing element can be independently rotated to engage or disengage from the fastening element, allowing the wiper blade to be quickly replaced without removing the entire fastening mechanism. This segmentation enables tool-free operation while maintaining secure connection during use.
Solution Approach 2:
The securing element is designed to be rotatable about a first axis of rotation, transitioning between engaged and disengaged positions. This dynamic mechanism allows the connection state to change easily through simple rotational motion, eliminating the need for tools while ensuring reliable fastening during operation. The dynamic design directly addresses both connection strength and ease of replacement.
2Reliability
If traditional screwed connections are used to fasten the windscreen wiper device, then the connection strength is improved, but the productivity and time efficiency worsen
Solution Approach 1:
The securing element is pre-configured in the fastening device in an engaged position, allowing the wiper blade to be immediately secured upon installation. During replacement, the securing element is simply rotated to disengage, and the new blade is inserted and secured in one continuous motion. This preliminary configuration eliminates the time-consuming steps of traditional screw fastening while maintaining connection reliability.
Solution Approach 2:
The rotatable securing element enables rapid transition between fastened and unfastened states through simple rotational motion. This dynamic mechanism allows the entire replacement process to be completed quickly without tools, significantly improving productivity and time efficiency while ensuring reliable connection during normal operation.
3Ease of operation
If a rotatable securing element is used instead of screwed connections, then the ease of operation and productivity are improved, but the device complexity increases
Solution Approach 1:
By dividing the fastening device into a fastening body and a separate securing element, the complexity is localized to a single rotatable component rather than distributing it throughout the entire fastening mechanism. This segmentation keeps the overall device complexity manageable while achieving ease of operation through the simple rotational motion of the securing element.
4Productivity
If easy replacement mechanisms are used, then the ease of operation and productivity are improved, but the connection strength and reliability may worsen
Solution Approach 1:
The rotatable securing element provides a dynamic fastening mechanism that delivers connection strength comparable to screwed connections during normal operation, while enabling rapid replacement through simple rotation. The engagement geometry ensures reliable force transmission during wiper operation, and the disengagement requires minimal motion, achieving both high reliability and fast replacement speed.
Data Source
AI summary
A fastening device (100, 200) configured to fasten a windscreen wiper device on a fastening element (50) of a vehicle, in particular of a motor vehicle. The fastening device (100) comprises: a first receiving region (110), into which the fastening element (50) can be introduced; and a securing element (120) mounted rotatably about a first axis of rotation (122), wherein the first axis of rotation (122) extends substantially perpendicular to a longitudinal extent (51) of the fastening element (50), and wherein the securing element (120) is configured to form an engagement with the fastening element (50) through a first rotation (124) about the first axis of rotation (122).