Electrode Spring Orientation for Compact Gas Sensors
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Solution Overview
Problem
Gas sensors face limitations in shortening the length of the sensor device and improving the heat resistance of electrode springs due to the orientation of the bent portion, which affects the metallic terminals' heat resistance and length.
Innovation Solution
The electrode springs are arranged with a retained portion, a contact portion that is elastically deformed, and a bent portion located on the base end side, allowing the contact portion to extend towards the front end, reducing the length of the sensor device and positioning the bent portion on the low-temperature side to enhance heat resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bent portion of the metallic terminal is oriented toward the head of the sensor device, then the spring property of the metallic terminal is achieved, but the heat resistance of the metallic terminals deteriorates due to exposure to high-temperature areas
Solution Approach 1:
The patent inverts the conventional orientation of the bent portion. Instead of orienting the bent portion toward the head (high-temperature side) of the sensor device, the bent portion is oriented toward the base end (low-temperature side). This inversion allows the metallic terminal to maintain its spring property while avoiding high-temperature exposure, thereby resolving the contradiction between reliability and heat resistance.
2Reliability
If the contact portion of the metallic terminal is located on the base end side, then the spring property is maintained, but the sensor device cannot be shortened in the lengthwise direction
Solution Approach 1:
The patent changes the spatial arrangement by orienting the contact portion in a slanted direction relative to the lengthwise direction of the sensor device. Instead of extending the contact portion purely in the lengthwise direction from the base end, it is oriented at an angle toward the front end. This dimensional change allows the sensor device to be shortened in the lengthwise direction while maintaining the spring property through the bent portion's orientation toward the base end.
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
This arrangement decreases the length of the sensor device and improves the heat resistance of the electrode springs by positioning the bent portion away from high-temperature areas, resulting in a more compact and resilient gas sensor design.
Implementation Method 1
a contact portion which is elastically deformed and placed in contact with the electrode
Data Source
AI summary
The gas sensor is equipped with a sensor device, a plurality of electrode springs contacting with electrodes and of the sensor device, an insulator retaining the electrode springs, and a plurality of leads connected to the respective electrode springs. Each of the electrode springs includes a retained portion retained by the insulator and a contact portion which is bent and inclined from the retained portion toward a front end side of the sensor device in the lengthwise direction. The contact portion is elastically deformed in contact with the electrode. Each of the electrode springs also includes a bent portion between the contact portion and the retained portion. The bent portion constitutes a base end of the contact portion and is oriented toward the base end side of the gas sensor in the lengthwise direction, thereby enabling the length of the sensor device to be decreased and improving the heat resistance of the electrode springs.