Switch Device Knob Insertion Crossing Water Prevention Wall
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Solution Overview
Problem
Existing switch devices for vehicles and electronic equipment face challenges in balancing ease of operation and mounting strength due to the placement of decorating members, which can lead to reduced finger rest concavity and potential water ingress, compromising both usability and durability.
Innovation Solution
The switch device features an operating knob with a base member and additional member having projecting insertion portions that cross the standing direction of the water prevention wall, allowing for increased finger rest concavity and mounting strength without interfering with the water prevention mechanism, thus preventing rainwater ingress and ensuring the decorating member's secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insertion portion of the decorating member is placed in the space between the water prevention wall and the finger rest, then rainwater can be guided away from the opening, but the finger rest cannot be concaved sufficiently, reducing ease of operation
Solution Approach 1:
The insertion portion is extended to cross the standing direction of the water prevention wall, moving from a horizontal placement to a three-dimensional configuration that utilizes the vertical dimension. This allows the insertion portion to extend above the water prevention wall while maintaining adequate space for finger rest concavity, thereby resolving the spatial conflict between water prevention and ease of operation
2Ease of operation
If the finger rest is concaved rearward to improve ease of operation, then operator comfort is enhanced, but the space for installing the insertion portion is reduced, compromising mounting strength
Solution Approach 1:
By extending the insertion portion vertically to cross the standing direction of the water prevention wall, the design creates additional mounting space in the vertical dimension. This allows sufficient finger rest concavity for ease of operation while maintaining adequate insertion portion length for secure mounting of the decorating member
3Strength
If the insertion portion is extended to cross the water prevention wall, then mounting strength is improved, but the complexity of the structure increases
Solution Approach 1:
The insertion portion serves multiple functions: it provides structural support for mounting the decorating member, acts as a water guide to direct rainwater away from the opening, and maintains spatial separation from the light source area. By consolidating these functions into a single extended component, the design achieves enhanced mounting strength without proportionally increasing overall structural complexity
Data Source
AI summary
A switch device which is capable of ensuring mounting strength of an additional member while ensuring ease of operation. The switch device has an operating knob that transmits an input operation to a switch unit with an electric contact, and a housing that houses a switch unit. The housing that houses the switch unit has an opening via which the switch unit and the operating knob face each other. The housing has a water prevention wall installed in a standing manner to surround the opening. The operating knob has a box-shaped base member with one end thereof opened. An additional member with at least one insertion portion which is inserted into a through hole of the base member is mounted on the base member. The insertion portion extends to cross a standing direction of the water prevention wall, and as seen in the standing direction, the insertion portion and the opening are located away from each other.