Switch Device Sequential Operation Pusher Height
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Solution Overview
Problem
The existing switch device for automobile power windows has a high self-holding force for the automatic switch, leading to increased costs, which is not efficiently managed by the sequential operation of manual and automatic switches.
Innovation Solution
A switch device with a pusher height set to 0.9 times or more of the distance between the operating points of the manual and automatic switches, allowing for sequential operation with a small self-holding force for the automatic switch, utilizing a knob that transfers force closer to the manual switch side to prioritize the manual switch activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pusher height is set to 0.13 times the distance between operating points (conventional design), then the sequential operation of manual and automatic switches is achieved, but the self-holding force of the automatic switch increases and cost rises
Solution Approach 1:
The invention changes the geometric parameter of the pusher height from 0.13 times the distance between operating points to 0.9 times or more of that distance. This parameter change fundamentally alters the force distribution mechanism, allowing the automatic switch to operate with minimal self-holding force while maintaining reliable sequential operation with the manual switch.
2Ease of manufacture
If the automatic switch has small self-holding force, then cost is reduced, but the operating force from the knob is considerably influenced by friction making sequential operation difficult
Solution Approach 1:
By increasing the pusher height to 0.9 times or more of the distance between operating points, the invention creates a mechanical advantage that amplifies the operating force from the knob. This geometric modification ensures that even with minimal self-holding force in the automatic switch, the sequential operation remains reliable and easy to perform.
3Force
If the pusher height is increased to 0.9 times or more of the distance between operating points, then the automatic switch can have small self-holding force, but the operating force is more influenced by friction
Solution Approach 1:
The invention converts the potentially harmful effect of friction into a beneficial mechanism. By designing the pusher height to be 0.9 times or more of the distance between operating points, the frictional influence on the operating force is leveraged to ensure reliable sequential operation, where the friction actually helps maintain the desired operation sequence rather than hindering it.
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
Enables the sequential turning on of manual and automatic switches while maintaining a small self-holding force for the automatic switch, effectively managing operating forces and reducing costs by leveraging frictional influence.
Implementation Method 1
the operating force of the knob is considerably influenced by friction, therefore, it is possible to push and turn on the manual switch and the automatic switch sequentially
Data Source
AI summary
When a knob is operated, operating force is exerted on an operating point Pm of the manual switch and an operating point Po of the automatic switch from a pusher, and thus the manual switch and the automatic switch are pushed and turned on sequentially. In this case, since the height H of the pusher is set ‘0.9 times’ or more of the distance Lmo from the operating point Pm of the manual switch to the operating point Po of the automatic switch, the pusher has a vertically long shape. As a result, the operating force of the knob is influenced by the friction when the automatic switch is pushed and turned on. Therefore, the manual switch and the automatic switch can be pushed and turned on sequentially while using the automatic switch having small self-holding force Fo.