Vehicle Seat Pressure Switch with Elastic Support Structure
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Solution Overview
Problem
The existing human body pressure switches in vehicle seats suffer from false triggering due to unstable elasticity and density variations in elastic foamed sponge materials, leading to irreversible shape deformations and altered elastic modulus over time, affecting their normal pressure activating state and application function.
Innovation Solution
A human body pressure switch design featuring an elastic pressure-contact body with a spacing support structure and a force support protrusion, where the spacing support structure deforms more than the force support protrusion under external force, providing a supporting role when no force is applied, and the force support protrusion presses down the sensing contact of the pressure switch element, ensuring stable triggering. The elastic pressure-contact body is made of rubber-plastic materials like natural rubber or silicone rubber, with specific geometries such as arch-shaped or hollow structures to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic foamed sponge material is used as the activation triggering material for the pressure switch element, then the pressure switch can detect human body presence, but the unstable elasticity and density features cause false triggering
Solution Approach 1:
The patent changes the material parameter from elastic foamed sponge to elastic rubber-plastic material, which has more stable elastic properties and does not undergo irreversible deformation, thereby improving the reliability of the pressure switch while maintaining the cushioning function
Solution Approach 2:
The patent uses composite structure with spacing support structures and force support protrusions made of elastic rubber-plastic material, combining the cushioning function with stable elastic properties to prevent false triggering
2Duration of action of stationary object
If elastic foamed sponge material is used under long-term pressure, then the pressure switch can function initially, but irreversible shape deformations occur affecting normal pressure activating state
Solution Approach 1:
The patent changes the material from foamed sponge to elastic rubber-plastic material that resists irreversible deformation, maintaining shape stability throughout the service life and ensuring consistent pressure activating state
Solution Approach 2:
The spacing support structures provide preliminary support to prevent excessive deformation under long-term pressure, cushioning against the degradation that would otherwise occur in foamed sponge materials
3Ease of manufacture
If foamed sponge material with large local hardness deviations is used, then manufacturing is simplified, but usage sensitivity of the pressure switch is affected
Solution Approach 1:
The patent changes the material to elastic rubber-plastic with more uniform hardness properties, improving manufacturing precision while still allowing for relatively simple molding processes
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 design reduces the likelihood of false triggering by providing a concentrated force-bearing point and preventing the sensing contact from being affected by pre-pressing forces, such as internal stress or weight of the seat cushion, resulting in improved reliability and sensitivity of the pressure switch.
Implementation Method 1
The spacing support structure, in a state of an external force applied, is deformed by amount greater than the amount of deformation of the force support protrusion. The spacing support structure, in a state of no external force applied, plays a supporting role.
Implementation Method 2
the force support protrusion corresponds to a sensing contact of the pressure switch element... the force support protrusion presses down the sensing contact of the pressure switch element
Data Source
AI summary
Provided is a human body pressure switch, a vehicle seat, a vehicle, and a method for processing a human body pressure switch. The human body pressure switch includes: a pressure switch element, an elastic pressure-contact body provided at the upper side or the lower side of the pressure switch element, in which the elastic pressure-contact body includes a spacing support structure and a force support protrusion, the force support protrusion corresponds to a sensing contact of the pressure switch element, in a state with pressure from an external force, amount of deformation of the spacing support structure is greater than amount of deformation of the force support protrusion, and in a state without pressure from the external force, the spacing support structure plays a supporting role.