Wiper Arm Cover-Latch Structure to Prevent Accidental Disengagement
Solution Overview
Problem
The existing assembly structure of windshield wiper driving arm and accessory piece is prone to accidental disengagement due to the protruding resilience button, leading to an insecure connection.
Innovation Solution
The assembly structure incorporates a stepped surface with a front latching segment and arc segments on the accessory piece, along with a latching block and limiting slot on the wiper driving arm, ensuring the latching block is non-protruding and securely embedded, and includes a guiding slope and blocking ribs to prevent accidental disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a resilience button is used to connect the wiper driving arm and accessory piece, then the connection is simple and easy to assemble, but the resilience button protrudes from the surface making it easy to accidentally contact and disengage
Solution Approach 1:
The resilience button is extracted from the protruding state and embedded into the accessory piece through the limiting slot. The button is now contained within the accessory piece structure rather than protruding outward, eliminating the hazard of accidental contact while maintaining the simple elastic connection mechanism.
Solution Approach 2:
The resilience button is nested within the accessory piece structure, specifically embedded in the limiting slot. This nesting approach allows the button to remain functional for connection while being protected from external accidental contact, as it is now housed within the overall structure rather than exposed on the surface.
2Reliability
If the latching block is embedded in the limiting slot to prevent disengagement, then the connection stability is improved, but the structure complexity increases with additional components
Solution Approach 1:
The latching block is merged with the elastic arm to form an integrated elastic arm assembly. This combining of functions reduces the number of separate components while achieving both the latching function and the elastic retention function, thereby improving connection stability without proportionally increasing structure complexity.
Solution Approach 2:
The elastic arm serves multiple functions: it provides the resilient force for connection, contains the latching block for secure engagement, and works with the limiting slot to prevent disengagement. This multi-functionality reduces the need for separate dedicated components for each function, balancing reliability improvement with acceptable structure complexity.
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 design ensures a secure and stable connection between the wiper driving arm and accessory piece, preventing accidental disengagement and enhancing the durability of the assembly.
Implementation Method 1
The main body includes an elastic arm and a latching block disposed on the top thereof
Data Source
AI summary
This disclosure is an assembly structure of a windshield wiper. An accessory piece includes a main body and a head portion. A stepped surface is defined between the head portion and the main body. The stepped surface includes a front latching segment and two arc segments. The main body includes an elastic arm and a latching block located on the top thereof. The latching block includes a stepped portion. A wiper driving arm includes an arm body and a cover. The cover includes a top surface and two side walls. The top surface abuts against the front latching segment, and the two side walls abut against the two arc segments respectively. The latching block is embedded in the limiting slot on the top surface. One side of the limiting slot is located in the stepped portion and the latching block is non-protruding from the top surface.