Vehicle Seat Backrest Vibration Damping via Elastic Support Plate
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Solution Overview
Problem
Incorporating a vibrating device into a vehicle seat backrest poses a challenge in balancing occupant comfort and perception of alerts, as direct contact with the occupant can cause discomfort, and attaching it to the frame leads to excessive vibration, reducing comfort.
Innovation Solution
A vehicle seat backrest design featuring a support plate with vibrating devices fixed using damping elements, which are partially isolated from the seat base frame, allowing for a compact and thin design, with features like elastic fixation, electronic control units, lumbar support pads, and inflatable pouches for enhanced comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vibrating device is directly attached to the seat frame, then the alert perception is enhanced, but the occupant comfort deteriorates due to excessive vibration transmission
Solution Approach 1:
The patent introduces a damping element as an intermediary component between the vibrating device and the support plate. This damping element acts as a mediator that allows the vibrating device to function for alert perception while simultaneously reducing the transmission of harmful vibrations to the occupant, thus resolving the contradiction between alert effectiveness and comfort.
2Object-affected harmful factors
If the vibrating device is isolated from the seat frame using damping elements, then the occupant comfort is improved, but the alert perception capability is reduced
Solution Approach 1:
The damping element is designed with specific physical parameters (material properties, thickness, damping coefficient) that allow it to selectively attenuate certain vibration frequencies while transmitting others. By carefully selecting and adjusting these parameters, the system maintains effective alert perception capability while reducing harmful vibration transmission to the occupant.
3Device complexity
If the vibrating device is fixed to the support plate, then the device complexity is reduced, but the vibration isolation effectiveness is compromised
Solution Approach 1:
The damping element is integrated directly into the support plate structure, merging the mounting function with the vibration isolation function into a single component. This integration maintains structural simplicity while effectively reducing vibration transmission, as the damping element becomes an inherent part of the support plate rather than a separate附加 component.
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 isolates vibrations, maintaining occupant comfort while allowing for alert perception, resulting in a compact and comfortable backrest that prevents direct vibration transmission to the seat frame.
Implementation Method 1
each vibrating device being fixed to the support plate by means of at least one damping element
Implementation Method 2
at least one damping element in the form of a pin made at least partly of elastic material
Data Source
AI summary
A backrest of a vehicle seat comprises a backrest frame, a support plate fixed to the backrest frame, and at least one vibrating device. Each vibrating device is fixed to the support plate by means of at least one damping element. Preferably, each vibrating device is fixed on a face of the support plate opposite to the face intended to be oriented towards an occupant of the seat, at least a portion of each vibrating device being received in a respective through-hole in the support plate.