Vehicle Door Latch Actuator Switch Integration
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Solution Overview
Problem
Existing vehicle door latch operating devices face issues with water resistance and high manufacturing costs due to long electric wires connected to the inside-handle detecting switch.
Innovation Solution
The design incorporates a compact actuator housing with the detecting switches positioned to minimize water exposure and reduces wire length by integrating the switches directly within the actuator, enhancing water resistance and reducing electrical connections, thus lowering costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inside-handle detecting switch is exposed on the base plate, then the structure is simple and easy to manufacture, but water resistance is poor and manufacturing costs increase due to long electric wires
Solution Approach 1:
The detecting switch is integrated into the actuator housing, merging the switch component with the actuator assembly. This eliminates the need for separate mounting on the base plate and reduces wire length by positioning the switch adjacent to the lever mechanism it monitors, thereby improving water resistance while maintaining manufacturing simplicity.
Solution Approach 2:
The actuator housing serves as an intermediary structure that houses the detecting switch and provides a protected environment. This intermediary housing shields the switch from water exposure while maintaining the functional relationship between the switch and the lever mechanism through controlled access points.
2Ease of operation
If the inside-handle detecting switch is exposed on the base plate, then installation is straightforward, but electric wire length increases and manufacturing costs increase
Solution Approach 1:
The detecting switch is merged with the actuator assembly, creating an integrated unit that simplifies installation. The switch is positioned within immediate proximity to the lever mechanism, eliminating the need for long wire runs across the door assembly, thereby reducing both material costs and installation complexity.
3Reliability
If the detecting switch is positioned away from the lever mechanism, then water exposure is minimized, but wire length increases and costs increase
Solution Approach 1:
The detecting switch is merged into the actuator housing, which is positioned adjacent to the lever mechanism. This integration allows the switch to monitor lever movement through direct mechanical coupling or proximity sensing without requiring long wire runs, thereby achieving water resistance through housing protection rather than distance.
Data Source
AI summary
An operating device for a vehicle door latch comprises an inside handle, a base member fixed to a door, and inside lever connected to the inside handle, a locking lever, a housing, a motor, an output lever, a detected lever coupled to the inside handle and an inside-handle detecting switch. The motion of the inside handle is detected by the inside-handle detecting switch via the detected lever of the device to make the door open or close. Another detecting switch detects motion of a swinging member outside the housing.