Vehicle Headrest Structure With Internal Dynamic Damper
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing vehicle seat headrest designs, which incorporate a dynamic damper to reduce vibration, require panel members and a stay skeleton, making it difficult to achieve weight reduction and downsizing due to the structural necessity of these components.
Innovation Solution
A headrest design that uses small-sized stays forming part of the skeleton, with panel members sandwiching the stays to create a space and integrate the dynamic damper within, allowing for weight reduction by substituting the stay parts with panel members and utilizing an elastic body to enhance vibration restraint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If panel members and stay skeleton are used to form the headrest structure, then the dynamic damper can be arranged inside the headrest, but the weight of the headrest and vehicle seat increases
Solution Approach 1:
The patent merges the panel members and stay skeleton into an integrated structure where the panel members serve dual purposes: forming the outer shell and providing attachment points for the dynamic damper. This eliminates the need for separate panel members, reducing overall weight while maintaining vibration restraint functionality.
Solution Approach 2:
The stay skeleton is designed to perform multiple functions: providing structural support, forming the mounting framework for the dynamic damper, and serving as the attachment structure for the headrest cover. This multi-functionality eliminates the need for separate panel members, achieving weight reduction while maintaining structural integrity and vibration damping.
2Reliability
If panel members are added to form the space inside the headrest, then the dynamic damper can be arranged inside, but the device complexity increases
Solution Approach 1:
The patent combines the panel members and stay skeleton into a unified structure where the stay skeleton provides both structural support and the framework for housing the dynamic damper. This merging reduces the number of separate components and simplifies the overall structure while maintaining the ability to restrain vibration effectively.
3Weight of stationary object
If stays are downsized to reduce weight, then the headrest weight is reduced, but the strength and stability of the skeleton may be compromised
Solution Approach 1:
The stay skeleton is designed to perform multiple functions simultaneously: providing structural support, forming the mounting framework for the dynamic damper, and serving as the attachment structure for the headrest cover. This multi-functional design allows the stays to be optimized for strength-to-weight ratio, achieving weight reduction while maintaining necessary strength through efficient structural design.
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 achieves weight reduction and improved vibration restraint by integrating the dynamic damper within the headrest's skeleton, allowing for efficient vibration absorption and highly productive manufacturing processes.
Implementation Method 1
vibration transmitted from a vehicle body to the vehicle seat is transmitted a dynamic damper provided inside a headrest so as to make the dynamic damper resonate. Thus, vibration of the vehicle seat is converted into vibration of the dynamic damper, thereby restraining vibration of the vehicle seat.
Implementation Method 2
make the dynamic damper resonate. Thus, vibration of the vehicle seat is converted into vibration of the dynamic damper
Implementation Method 3
the dynamic damper may have a weight, and an elastic body that fastens the weight, and a part of the elastic body may be attached to at least one of the pair of panel members. Therefore, the weight vibrates easily with respect to the pair of panel members, thereby restraining vibration of the vehicle seat efficiently.
Data Source
AI summary
A vehicle seat includes a seat back, and a headrest that is provided above the seat back. The headrest includes a pair of stays that form a part of a skeleton of the headrest, a pair of panel members that sandwich parts of the pair of stays from front and rear or above and below so as to connect the stays with each other, and are joined to each other through outer peripheries so as to form a space inside and form a part of the skeleton of the headrest, a cushion material that covers the pair of panel members and the parts of the pair of stays, and a dynamic damper arranged inside the space.