Wiper Blade Foolproofing Connector Asymmetry
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Solution Overview
Problem
The existing wiper blade and wiper arm connection mechanism often results in incorrect fitting, leading to reduced production efficiency and potential user errors, as the asymmetrical wiping sides can be installed in the wrong direction, affecting the wiping area and performance.
Innovation Solution
A connection structure featuring a foolproofing part that prevents incorrect assembly by using a shaft and a connector with a specific orientation, where the foolproofing part obstructs the connection when fitted in the opposite direction, ensuring the wiper arm and wiper blade are always connected correctly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiper blade is designed with asymmetrical wiping sides to improve wiping performance, then the wiping quality is improved, but incorrect fitting becomes more likely and reduces production efficiency
Solution Approach 1:
The connector is designed with asymmetric features including a foolproofing part that only allows insertion in the correct orientation. The adapter has corresponding asymmetric geometry with a shaft and side parts that guide the connector into the proper position, preventing incorrect assembly while maintaining the asymmetric wiping blade design for optimal performance
Solution Approach 2:
The connection structure incorporates self-aligning features where the adapter's shaft and the connector's opening automatically guide each other into the correct orientation during assembly. The foolproofing part acts as a self-checking mechanism that physically blocks incorrect insertion, allowing workers to assemble without needing to pay close attention to orientation instructions
2Ease of operation
If the wiper blade uses a simple connection structure to improve ease of assembly, then assembly convenience is improved, but the risk of incorrect fitting increases
Solution Approach 1:
The connector features an asymmetric foolproofing part that protrudes in one direction,配合 with the adapter's asymmetric geometry including side parts and a shaft. This asymmetric design maintains simple assembly motion while preventing incorrect orientation through physical interference when attempted
Solution Approach 2:
The foolproofing part is positioned to preemptively block incorrect insertion attempts before the assembly process begins. The adapter's shaft and side parts create preliminary geometric constraints that guide the connector into the correct orientation, preventing wrong-way assembly before it can occur
3Manufacturing precision
If fitting direction markings are added to the product to reduce incorrect fitting, then fitting accuracy is improved, but device complexity increases
Solution Approach 1:
The connection structure incorporates self-aligning features where the adapter's shaft and the connector's opening automatically guide each other into the correct orientation during assembly. The foolproofing part acts as a self-checking mechanism that physically blocks incorrect insertion, allowing workers to assemble without needing to pay close attention to orientation instructions
Data Source
AI summary
A wiper blade and a wiper. The wiper blade comprises a wiping strip and a connection structure, the connection structure comprising: an adapter fixed to the wiping strip, the adapter comprising a first side part and a second side part which are opposite each other, with a first surface and a second surface being disposed on the first side part and the second side part respectively; a connector, the interior of the connector having an opening, a foolproofing part facing the second surface, and a hole in communication with the opening; when the connector is fitted to the adapter in an opposite direction, the first surface obstructs the foolproofing part and the shaft cannot be hinged into the hole via the opening. The foolproofing part can prevent a wiper arm from being fitted to the wiper blade incorrectly.