Wiper Blade Holder Structure for Vertebra Movement Restriction
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Solution Overview
Problem
The existing wiper blade designs require a small support part and complex assembly, leading to increased parts management complexity and deterioration in assembly workability.
Innovation Solution
The wiper blade design incorporates a connecting member with a first and second holding part, a protruding part, and a vertebra with an engagement hole, which restricts the movement of the vertebra in the lengthwise direction, thereby reducing the number of parts and improving assembly workability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a support part is provided between the backing and the connecting lever to restrict movement, then the vertebra movement is controlled, but the number of parts increases and assembly workability deteriorates
Solution Approach 1:
The protruding part that restricts vertebra movement is integrated into the connecting lever body, merging two previously separate components (the support part and the connecting lever) into one unified structure. This eliminates the need for a separate support part while maintaining the movement restriction function, thereby reducing the total number of parts and simplifying assembly workability.
2Reliability
If a support part is provided between the backing and the connecting lever to restrict movement, then the vertebra movement is controlled, but assembly workability deteriorates
Solution Approach 1:
The support function is merged into the connecting lever through the protruding part integration. This eliminates the need for separate alignment and assembly of a support part, directly improving assembly workability while maintaining reliable vertebra movement control.
3Device complexity
If the protruding part is integrated into the connecting member, then the number of parts is reduced, but the support part functionality must be maintained
Solution Approach 1:
The protruding part is designed as an integral component of the connecting lever, combining the structural support function with the movement restriction function in a single element. This integration reduces the number of parts while ensuring that the vertebra movement restriction functionality is maintained through the geometric design of the protruding part and its engagement with the vertebra.
Data Source
AI summary
The present invention has a main holder 40 that is coupled to a wiper arm, a vertebra 22 that is held by the main holder 40 and curves with a prescribed curvature, and a blade rubber 30 that is held by the vertebra 22 and makes contact with a front glass 11, wherein the main holder 40 comprises a first claw part 46 and a second claw part 47 that hold the vertebra 22 with a gap in the lengthwise direction thereof, and a supporting protrusion 49 that is provided between the first claw part 46 and the second claw part 47, and protrudes toward the vertebra 22, and the vertebra 22 comprises an elongated hole 22a in which the supporting protrusion 49 is engaged.