Wiper Blade Rubber Tip Cutting to Prevent Chatter
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Solution Overview
Problem
Existing wiper blade regeneration methods result in inadequate wiping performance due to deformation of the cut surface, leading to irregular wiping and wiper blade chatter, as the tip end of the blade rubber is cut in a manner that causes elastic deformation and shape irregularities.
Innovation Solution
A blade rubber regeneration device that includes a sandwiching member to stabilize the lip portion, a pressing member to maintain the tip end during cutting, and an urging member to prevent elastic deformation, ensuring precise cutting of the blade tip end to restore its wiping performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tip end of the blade rubber is cut off using a simple cutter, then the regeneration process is simple and quick, but the cut surface deforms causing irregular wiping and wiper blade chatter
Solution Approach 1:
The cutting process is divided into multiple stages: a first blade performs initial cutting, followed by a second blade that performs precision cutting after the lip portion has been pressed flat. This segmentation allows each blade to perform its specific function, preventing deformation while achieving accurate cutting.
Solution Approach 2:
Before the actual cutting occurs, the lip portion is pressed flat by a pressing member. This preliminary action eliminates elastic deformation that would otherwise occur during cutting, ensuring the cut surface remains accurate and preventing irregular wiping.
2Productivity
If the blade portion enters the lip portion from the side to cut the tip end, then the cutting operation can be performed, but elastic deformation occurs causing shape irregularities
Solution Approach 1:
The pressing member applies force to the lip portion before cutting to counteract the elastic deformation that would naturally occur when the blade enters from the side. This preliminary anti-action prevents the shape irregularities while maintaining the efficiency of side-entry cutting.
Solution Approach 2:
The pressing member acts as an intermediary between the blade and the lip portion, controlling the deformation during the cutting process. By mediating the interaction, it ensures the lip portion maintains its shape accuracy while still allowing the cutting operation to proceed efficiently.
3Device complexity
If no fixing mechanism is used during cutting, then the device structure is simple, but the lip portion deforms causing poor wiping performance
Solution Approach 1:
The sandwiching member clamps the lip portion before cutting begins, performing a preliminary fixing action. This prevents deformation during the cutting process while maintaining relatively simple device structure, thereby ensuring reliable wiping performance.
Solution Approach 2:
The sandwiching member applies clamping force only at the specific location of the lip portion that needs to be held stable during cutting. This localized fixing approach provides necessary stability for reliable wiping performance without adding unnecessary complexity to the overall device structure.
Data Source
AI summary
A blade rubber regeneration device, wherein the regeneration device comprises a blade portion for cutting off the tip end of the lip portion in a longitudinal direction of the blade rubber, the regeneration device cuts off a part of the tip end of the lip portion by relatively moving the blade portion from an end part A, which is one end part in the longitudinal direction of the blade rubber, toward an end part B, which is the other end part, the regeneration device comprises: a sandwiching member of sandwiching the lip portion; a specific urging member; and a pressing member which presses the tip end of the lip portions, the sandwiching member sandwiches at least a part of the lip portion from both side portions of the lip portion in a specific condition, the pressing member presses the tip end of the lip portion prior to the movement.