Conveyance Seat Frame Resonance Suppression via Uneven Surface Geometry
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Solution Overview
Problem
Conveyance seats with electric actuators face challenges in suppressing resonance, leading to operational noise transmission to occupants, and existing solutions require extensive manufacturing efforts.
Innovation Solution
Incorporating a resonance suppressing portion in the seat frame with continuously formed non-penetrating recesses and/or protrusions, which alters the natural frequency of the frame and reduces resonance without compromising rigidity, and strategically placing these features to minimize noise transmission to the occupant.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If through holes are formed in the seat frame and recesses are formed in the pad to suppress resonance, then resonance is suppressed, but manufacturing time increases significantly
Solution Approach 1:
The invention extracts the resonance suppression function from the complex multi-component structure (through holes in frame + recesses in pad) and implements it through a single structural modification - the uneven region formed by continuously formed non-penetrating recesses and protrusions on the seat frame surface. This simplifies the manufacturing process while maintaining resonance suppression effectiveness.
Solution Approach 2:
The invention changes the surface geometry parameters of the seat frame by forming an uneven region with continuously formed non-penetrating recesses and protrusions. This modifies the natural frequency of the seat frame, thereby suppressing resonance without requiring through holes or pad modifications, thus reducing manufacturing time.
2Object-affected harmful factors
If the seat frame structure is modified to suppress resonance, then resonance is reduced, but the rigidity of the seat frame may be compromised
Solution Approach 1:
The invention applies local quality modification by forming an uneven region with continuously formed non-penetrating recesses and protrusions only in specific areas of the seat frame where resonance occurs, rather than modifying the entire frame structure. This localized approach suppresses resonance while preserving the overall rigidity and strength of the seat frame.
Solution Approach 2:
The invention uses partial action by forming non-penetrating recesses and protrusions that extend only partially through the seat frame thickness, rather than creating complete through holes. This partial modification is sufficient to change the natural frequency and suppress resonance while maintaining the structural integrity and rigidity of the frame.
3Object-affected harmful factors
If multiple resonance suppressing portions are added to the seat frame, then resonance suppression is improved, but device complexity increases
Solution Approach 1:
The invention merges multiple resonance suppression functions into a single integrated structure - the uneven region formed by continuously formed non-penetrating recesses and protrusions. This continuous structure performs resonance suppression across multiple frequencies and locations simultaneously, avoiding the need for separate discrete resonance suppressing components and reducing overall structural complexity.
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
Effectively suppresses resonance and operational noise transmission to the occupant while simplifying manufacturing and maintaining the seat frame's rigidity.
Implementation Method 1
the natural frequency of the seat frame changes and the resonance of the seat frame due to the operational vibration of the actuator can be suppressed
Data Source
AI summary
Provided is a conveyance seat having a seat frame that suppresses a resonance by a simple means in a seat frame with an actuator. A conveyance seat is a conveyance seat having a seat frame with an actuator and includes a resonance suppressing portion which is formed in at least a part of the seat frame by a first uneven region formed by continuously forming a plurality of non-penetrating recesses and/or protrusions. Since the natural frequency of the seat frame changes, the resonance of the seat frame due to the operational vibration of the actuator can be suppressed.