Windscreen Wiper Blade Connecting Piece Retention
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Solution Overview
Problem
The prior art windscreen wiper devices suffer from a lack of durable connection between the wiper blade and the connecting pieces, leading to the wiper blade coming loose, which shortens the device's lifespan.
Innovation Solution
The introduction of engaging members with retaining means on the connecting pieces that securely grip the wiper blade, utilizing sidewardly extending gripping teeth and snap connections to prevent movement, ensuring the wiper blade remains attached in both directions, and optionally gluing or welding for added stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the connecting piece allows free sliding of the wiper blade through its opening, then the assembly is simple and easy to manufacture, but the wiper blade may come loose from the connecting piece, reducing reliability
Solution Approach 1:
The connecting piece is divided into functional segments: the channel for receiving the wiper blade, the engaging members with gripping teeth for lateral retention, and the retaining means (protrusions/notches) for longitudinal positioning. This segmentation allows each component to perform its specific function while maintaining overall simplicity
Solution Approach 2:
The wiper blade is nested within the channel of the connecting piece, with the engaging members wrapping around the wiper blade laterally. The gripping teeth engage into the longitudinal slits of the wiper blade, creating a nested retention structure that prevents both lateral and longitudinal movement
2Device complexity
If the wiper blade is freely movable through the connecting piece, then the device complexity is low, but the wiper blade can detach, shortening the device lifespan
Solution Approach 1:
The retaining means (protrusions and notches) are pre-formed during manufacturing of the connecting piece, so that when the wiper blade is inserted, the gripping teeth automatically engage into the longitudinal slits and the protrusions align with the notches, preliminarily establishing the retention mechanism before any operational stress occurs
Solution Approach 2:
The gripping teeth act as intermediary elements between the connecting piece and the wiper blade, physically bridging the two components and preventing relative movement. The teeth engage into the slits of the wiper blade, creating a mechanical interlock that mediates the connection
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
The enhanced connection significantly increases the durability and longevity of the windscreen wiper device by preventing the wiper blade from detaching from the connecting pieces, thereby extending its operational life.
Implementation Method 1
an elastic, elongated carrier element
Implementation Method 2
a reliable snap connection between these parts is realized
Data Source
Figure 1
Figure 2~5
AI summary
A windscreen wiper device (1) comprising an elastic, elongated carrier element, as well as an elongated wiper blade (2) of a flexible material, which can be placed in abutment with a windscreen to be wiped, which wiper blade (2) includes at least one groove (3), in which groove (3) a longitudinal strip (4) of the carrier element is disposed, with the special feature that ends of said wiper blade (2) are connected to a respective connecting piece (6), which windscreen wiper device comprises a connecting device (7) for an oscillating wiper arm (8), wherein at least one connecting piece (6) comprises engaging members (11) sidewardly engaging said wiper blade from the outside, wherein said engaging members (1) comprise retaining means (13) for retaining said said wiper blade (2) onto said connecting piece (6).