Windshield Wiper Driving Arm Assembly With Elastic Slot Locking
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Solution Overview
Problem
The existing windshield wiper driving arm assembly is prone to loosening due to the degradation of plastic elastic buttons, leading to an unstable connection and potential failure of the wiper mechanism.
Innovation Solution
The assembly structure incorporates an accessory piece with elastic arms featuring a bump and a cover with restricting slots, ensuring a secure coupling between the wiper driving arm and the accessory piece through engagement of the restricting slots with the bump, enhancing stability and preventing loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an elastic button made of plastic is used to connect the accessory piece to the driving arm, then the assembly is easy to manufacture, but the connection becomes unstable over time due to aging and loss of resilience
Solution Approach 1:
The patent changes the material parameter from plastic to metal for the elastic arms, fundamentally altering the physical and chemical properties. This material substitution eliminates the aging and resilience loss issues inherent in plastic, while maintaining the elastic functional requirements through metal's inherent properties
Solution Approach 2:
The patent employs composite material construction where metal elastic arms are integrated with the accessory piece structure. This combines the elasticity needed for connection with the durability and stability of metal, creating a hybrid solution that overcomes the limitations of pure plastic construction
2Device complexity
If a simple elastic button connection is used, then the device complexity is reduced, but the connection reliability deteriorates due to loosening over time
Solution Approach 1:
The patent introduces dynamic elastic arms that can deflect and return to their original position, providing a self-adjusting connection mechanism. This dynamic capability allows the connection to maintain stability under varying conditions while preserving structural simplicity
Solution Approach 2:
The accessory piece is segmented into distinct functional components: the body portion and the elastic arms. This segmentation allows each component to be optimized independently - the body for structural integrity and the elastic arms for connection stability - while maintaining overall assembly simplicity
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 new assembly structure provides a stable and reliable connection that prevents loosening, ensuring the wiper driving arm functions consistently over time.
Implementation Method 1
The pair of elastic arms are arranged on two sides of the head portion and two sides of the main body opposite to each other. Each elastic arm includes a pressing section located on the head portion and a positioning section extending to the main body. The positioning section includes a bump located on an end of the elastic arm.
Data Source
Figure 1
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AI summary
An assembly structure of a windshield wiper driving arm (1), the assembly structure includes an accessory piece (10) and a wiper driving arm (20). The accessory piece (10) includes a head portion (11), a main body (12) and a pair of elastic arms (13). The main body (12) is connected to the head portion (11). The pair of elastic arms (13) are arranged on two sides of the head portion (11) and two sides of the main body (12). Each elastic arm (13) includes a pressing section (131) and a positioning section (132). The positioning section (132) includes a bump (133). The wiper driving arm (20) includes an arm body (21) and a cover (22). The cover (22) includes a pair of restricting slots (23), and the wiper driving arm (20) is coupled to the accessory piece (10) through an engagement of each restricting slot (23) and the bump (133).