Window Glass Lifting Device Fitting Member Corrosion Prevention
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Solution Overview
Problem
The connection between dissimilar metals in window glass lifting devices leads to electrolytic corrosion, reducing strength, and existing solutions require complex mounting to prevent direct contact, which can be prone to dislodgment.
Innovation Solution
A fitting member with an electrolytic corrosion suppressing portion is used between the metal portions of the driving force transmitting member and the carrier plate, preventing direct contact and securely mounting to prevent corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin-made washer is used to prevent direct contact between dissimilar metals, then electrolytic corrosion is prevented, but the mounting complexity increases and the washer may easily drop out
Solution Approach 1:
The patent combines the electrolytic corrosion prevention function with the mounting structure by integrating the resin-made washer into a recess formed directly in the carrier plate. This merging of the washer and mounting structure eliminates the need for separate mounting operations and prevents the washer from dropping out, while still providing effective corrosion protection between dissimilar metals.
Solution Approach 2:
The carrier plate is designed with a multi-functional recess that simultaneously serves as both the mounting structure for the resin-made washer and the electrolytic corrosion prevention mechanism. This universal design allows a single structural feature to fulfill multiple functions: securing the washer in place and preventing direct contact between dissimilar metals.
2Reliability
If a resin-made washer is mounted to prevent direct contact between dissimilar metals, then corrosion is prevented, but the mounting process becomes more difficult
Solution Approach 1:
The resin-made washer is integrated into a recess formed in the carrier plate, combining the washer and mounting structure into a single unit. This integration eliminates separate mounting steps, making the manufacturing process simpler while ensuring the washer remains securely in place to prevent corrosion.
Solution Approach 2:
The recess for receiving the resin-made washer is pre-formed in the carrier plate during the carrier plate manufacturing process. This preliminary action ensures that the mounting structure is already in place before the actual assembly, making the subsequent mounting of the washer trivial and ensuring proper positioning without requiring complex mounting operations.
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 solution effectively prevents electrolytic corrosion and ensures easy, secure mounting of the fitting member, maintaining strength and reliability in the window glass lifting device.
Implementation Method 1
When such dissimilar metals make contact, electrolytic corrosion occurs and strength decreases in the contact portion.
Data Source
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AI summary
To easily mount a member that prevents direct contact between dissimilar metals. An object moving device (10) including a driving unit (20), a carrier plate (30) including a mounting portion (31) to which a moving object (Wg) is mounted and a metal body (34), a guide member (60) configured to guide the carrier plate (30), a driving force transmitting member (80) connected to the carrier plate (30) and configured to transmit a driving force of the driving unit (20) to the carrier plate (30), and a fitting member (90) to be fit in the carrier plate (30). The driving force transmitting member (80) includes a metal portion (88) to be indirectly engaged with the metal body (34), and the fitting member (90) includes an electrolytic corrosion suppressing portion (92) that is engaged with the metal portion (88) to be interposed between the metal body (34) and the metal portion (88) to suppress electrolytic corrosion, and a fitting portion (94) to be fit in the carrier plate (30).