Universal Wiper Blade Adaptor for Multi-Arm Compatibility
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Solution Overview
Problem
Conventional windshield wiper blade assemblies require different support frames for varying main arm types, leading to material waste, increased costs, and inconvenience, as well as wear and corrosion due to direct contact with windshields.
Innovation Solution
A wiper blade assembly structure with a space unit in the support frame that allows a detachable replaceable adaptor to couple various main arms, featuring a fixing pin and hook member for secure attachment, and an insert reinforcing frame for enhanced strength using a steel material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different support frames are used for varying main arm types, then the wiper blade can be properly coupled to each main arm, but material waste increases and manufacturing costs rise
Solution Approach 1:
The support frame is designed with a universal space unit that can accommodate multiple types of main arms through different adaptors. The space unit has a standardized structure with fixing pins and hook members that work with various adaptor configurations, allowing a single support frame design to serve multiple main arm types rather than requiring dedicated support frames for each type.
Solution Approach 2:
The coupling system is divided into three separable components: the support frame with the space unit, the adaptor specific to each main arm type, and the main arm itself. This segmentation allows the universal support frame to be combined with different adaptors to match various main arm configurations, reducing the need to manufacture multiple complete support frame assemblies.
2Strength
If a thick plastic support frame is used, then the structure provides sufficient strength, but the weight increases
Solution Approach 1:
The support frame combines plastic material with metal reinforcing frames to achieve high strength with reduced weight. The metal reinforcing frames are embedded within the plastic structure to provide additional structural support, allowing the plastic portions to be thinner than they would need to be if made from plastic alone, thus reducing overall weight while maintaining strength.
Solution Approach 2:
Instead of making the entire support frame thick throughout, metal reinforcing frames are strategically placed only in specific areas where additional strength is needed. This localized reinforcement approach provides sufficient structural strength while keeping the overall weight lower compared to a uniformly thick design.
3Reliability
If the wiper blade is closely adhered to the windshield, then wiping performance improves, but the blade wears heavily and cracks easily
Solution Approach 1:
The wiper blade incorporates a spring mechanism that dynamically adjusts the contact pressure between the blade and windshield. The spring allows the blade to maintain consistent adherence force despite variations in windshield curvature, temperature changes, and blade wear, optimizing wiping performance while distributing mechanical stress to extend blade life.
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
The wiper blade assembly structure according to the present invention comprises a main arm (200) which operates by a driving force supplied by a wiper motor; a support frame (30) which is connected to the main arm (200) and receives the driving force from the main arm (200) and has a space unit (31) formed in a certain size in an upper central part thereof and a lower coupling member formed in the space unit to be coupled to a replaceable adaptor (60); a replaceable adaptor (60) which is detachably attached to the space unit (31) of the support frame (30) by a fixing means using the fixing pin and couples the main arm (200) to the support frame (30); a blade fixer (20) which is coupled to a lower part of the support frame (30); a blade (10) which is coupled to the blade fixer (20); and the replaceable adaptor (60) having a coupling part formed in a central part thereof to be detachably coupled to a front end coupling part of the main arm (200), and having an upper coupling member formed in a lower part thereof corresponding to the lower coupling member of the support frame (30), and having a size to be inserted into an inside of the space unit (31) of the support frame (30). The wiper blade assembly according to the present invention connects various types of wiper main arms to a single blade assembly to thereby improve utilization of the wiper and saves manufacturing costs.