Wiper Arm Mounting Device Longitudinal Insertion
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Solution Overview
Problem
Conventional wiper levers for windshield wiper devices face challenges in mounting and dismounting wiper blades, especially under unfavorable visibility conditions, due to the need for precise perpendicular alignment and the risk of blade loss during assembly and disassembly.
Innovation Solution
A wiper lever with a mounting device featuring a recess delimited by two legs, allowing for a two-stage process of vertical and longitudinal insertion and removal, with a stop element and protective arcuate guide for secure latching and easy handling, minimizing the risk of blade loss and facilitating controlled force application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wiper blade is inserted perpendicular to the longitudinal alignment of the wiper lever, then the mounting opening can accommodate the wiper blade, but precise alignment is required which is difficult under unfavorable visibility conditions
Solution Approach 1:
The mounting device transitions the insertion direction from perpendicular to the longitudinal alignment (traditional approach) to parallel with the longitudinal alignment (invention approach). This dimensional change in the insertion vector allows the wiper blade to be mounted along the length of the lever rather than across it, eliminating the need for precise perpendicular alignment while maintaining secure mounting.
2Ease of operation
If the wiper lever is raised slightly for mounting, then the wiper blade can be inserted, but the wiper blade may be lost if visibility is poor or the lever cannot be folded down
Solution Approach 1:
The mounting device incorporates a retaining structure that预先 (in advance) prevents blade loss during the mounting process. The recess with lateral walls and the detent mechanism are designed to securely hold the wiper blade throughout the insertion and securing operations, eliminating the risk of accidental dropout that occurs with traditional raised-lever mounting methods.
3Reliability
If a recess with two legs is used for mounting, then the wiper blade can be securely latched, but the structure becomes more complex
Solution Approach 1:
The mounting device integrates multiple functions into a single compact structure: the recess provides insertion accommodation, the lateral walls provide retention and alignment, and the detent mechanism provides secure locking. This multi-functional design achieves reliable latching without requiring separate components for each function, thereby limiting the increase in overall structural complexity.
4Ease of operation
If the wiper blade is mounted in the longitudinal alignment of the wiper lever, then the force geometry is easier to control, but the mounting device requires a specific recess structure
Solution Approach 1:
The recess structure employs asymmetric design elements including lateral walls of specific heights and a detent mechanism positioned at a defined location within the recess. This asymmetric configuration optimizes the force distribution during longitudinal insertion, ensuring that the wiper blade engages smoothly and securely while maintaining ease of operation. The specific geometric asymmetry provides both the required structural integrity and the simplified force control.
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
Enables simple, secure, and controlled mounting and dismounting of wiper blades with reduced risk of loss, improved visibility during assembly, and enhanced protection against mechanical overload, allowing for efficient and user-friendly operation even in poor conditions.
Implementation Method 1
Advantageously, an elastic property of the legs of the mounting device is used in this way in order to fasten a mounting pin in the wiper blade by clamping and thereby support a secure seat of the wiper blade in the wiper lever.
Data Source
Figure 1
AI summary
Wiper arm for a windshield wiping device, the wiper arm comprising a mounting device at a free end for mounting a wiper blade, the mounting device having a recess constructed such that the wiper blade can be introduced into the recess substantially perpendicular to a longitudinal orientation of the wiper arm. The wiper arm is characterised in that the wiper blade can be snapped in and out of the recess substantially in the longitudinal orientation of the wiper arm.