Wiper Device Securing Unit Pivot Removal
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Solution Overview
Problem
Existing wiper devices lack a secure mechanism for removing the wiper arm adapter from the wiper blade adapter, leading to potential inadvertent removal during operation.
Innovation Solution
A wiper device design featuring a securing unit that allows removal of the wiper arm adapter exclusively in a specific pivoted position relative to the first wiper blade adapter element, incorporating a blocking element and guide surface to prevent unintended removal, and a slotted guide mechanism for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wiper arm adapter is allowed to be removed freely from the wiper blade adapter, then the ease of operation is improved, but the reliability deteriorates due to potential inadvertent removal during operation
Solution Approach 1:
The securing unit employs a dynamic blocking mechanism where the blocking element can be moved between a blocking position (preventing removal) and a non-blocking position (allowing removal). This is achieved through the actuating mechanism that responds to forces applied by the user, enabling the system to transition between locked and unlocked states based on operational needs.
Solution Approach 2:
The securing unit changes the mechanical state parameters of the coupling between the wiper arm adapter and wiper blade adapter. By altering the position of the blocking element along the guide path, the system changes from a state where removal is prevented to a state where removal is permitted, controlled by the actuating mechanism.
2Reliability
If a securing unit with blocking element is added to prevent inadvertent removal, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The blocking element serves multiple functions: it blocks the removal path when in the blocking position, guides the movement of the wiper arm adapter along its removal path, and can be actuated to transition between positions. The guide structure itself provides both the path definition and the constraints for the blocking element movement, combining multiple functions into integrated components.
Solution Approach 2:
The blocking element is positioned within the coupling structure between the wiper arm adapter and wiper blade adapter, nesting the security mechanism within the existing coupling geometry. The guide structure for the blocking element is integrated into the adapter components, allowing the securing unit to be embedded within the overall assembly rather than adding external complexity.
3Reliability
If the wiper arm adapter is constrained in pivoted positions, then the reliability is improved, but the ease of operation worsens due to restricted movement
Solution Approach 1:
The securing unit provides dynamic constraints that adapt to operational conditions. During normal operation, the blocking element maintains the wiper arm adapter in its functional pivoted position, providing stability. When removal is intended, the actuating mechanism allows the blocking element to move, releasing the constraint and permitting free movement. This dynamic behavior provides both stability during use and freedom during removal.
Solution Approach 2:
The blocking element is positioned to prevent unintended removal before it can occur. By maintaining the blocking position during operation, the system proactively prevents harmful unintended movements. The actuating mechanism allows the user to deliberately override this preliminary anti-action when removal is intended, distinguishing between accidental and intentional removal actions.
Data Source
AI summary
The invention relates to a wiper device (10) comprising a wiper blade adapter (12) having at least one first wiper blade adapter element (14) and at least one second wiper blade adapter element (16), which mounted such that it can pivot relative to the first wiper blade adapter element (14) in at least one mounted state, and comprising a wiper arm adapter (18), which is coupled to the second wiper blade adapter element (16) in the mounted state. According to the invention, the wiper blade adapter (12) has a security unit (20), which is provided to allow a removal of the wiper arm adapter (18) from the wiper blade adapter (12) exclusively in at least one removal pivot position of the wiper arm adapter (18) relative to the first wiper blade adapter element (14).