Elastic Sealing Cover with Pressure Relieving Part for Load Sensor
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Solution Overview
Problem
Existing electric tools with load sensors face challenges in reliably sealing the sensor area, leading to moisture and dust ingress, and pressure issues during the deformation of sealing covers, which can result in air leakage and difficulty in restoring the cover to its original shape.
Innovation Solution
A tool design incorporating a switch with a load sensor, a deformable sealing cover made of elastic material, and a preventing member that seals the internal space between the sealing cover and the load sensor, featuring a relieving part to manage pressure changes and prevent air leakage, ensuring a waterproof and dustproof structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a sealing cover made of elastic material is used to cover the load sensor, then the load sensor is protected from foreign matter, but air may leak from the internal space when the cover is pressed and volume decreases
Solution Approach 1:
The sealing cover is made of elastic material that can deform when pressed, maintaining flexibility while providing sealing protection. The cover's elastic properties allow it to adapt to pressure changes without compromising the seal integrity, preventing both foreign matter ingress and air leakage.
2Ease of operation
If the sealing cover is pressed and volume of internal space decreases, then the load sensor can be actuated, but negative pressure makes it difficult to restore the cover to its original shape
Solution Approach 1:
A relieving part is provided in advance within the sealing cover structure to equalize pressure before the cover needs to restore. This preliminary pressure equalization prevents negative pressure buildup that would hinder the cover's elastic recovery, ensuring smooth shape restoration after actuation.
Solution Approach 2:
The elastic material of the sealing cover provides inherent flexibility and memory, allowing it to return to its original shape after deformation. The material's elastic properties enable it to withstand pressing forces while maintaining the ability to recover automatically when the force is removed.
3Object-affected harmful factors
If the internal space is completely sealed, then foreign matter is prevented from entering, but pressure increase causes air to leak from the sealed space
Solution Approach 1:
The relieving part acts as an intermediary pressure equalization mechanism within the sealing system. It provides a controlled pathway for pressure balancing without compromising the overall seal, allowing the internal space to remain sealed against foreign matter while preventing air leakage through pressure management.
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 foreign matter from entering the load sensor, maintains a reliable seal, and allows the sealing cover to restore to its original shape without negative pressure, enhancing the tool's durability and operational reliability.
Implementation Method 1
The sealing cover includes an elastic material which is deformable when receiving the pressing force through the switch manipulation part
Implementation Method 2
the relieving part is configured to relieve an increase in pressure of an internal space between the sealing cover and the load sensor as the sealing cover is deformed
Data Source
AI summary
A tool includes a switch and a handle. The switch is configured to cause an electric component to operate. The handle is held by a hand to manipulate the switch. The switch includes a switch manipulation part to be manipulated, a load sensor, a sealing cover and a preventing member. The load sensor is configured to receive a pressing force through the switch manipulation part. The sealing cover includes an elastic material which is deformable when receiving the pressing force through the switch manipulation part, and is configured to press the load sensor. The preventing member is configured to seal an internal space between the sealing cover and the load sensor, around the load sensor.