Vehicle Seat Dynamic Damper with Separable Case for Adjustable Damping
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Solution Overview
Problem
The existing seat device for vehicles has a dynamic damper with a housing that cannot be easily disassembled, making it impossible to adjust or change the damping characteristics without replacing the entire unit, and the mounting process is cumbersome due to the lack of a mounting part for the seat.
Innovation Solution
A seat device with a dynamic damper featuring a damper case formed from separable case halves, allowing for adjustment of damping characteristics by exchanging the weight and elastic member, and a mounting part for easy attachment to the seat frame without special tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the housing is made into a non-separable unit, then the structural integrity and simplicity are improved, but the ability to adjust or replace weight and elastic member is lost
Solution Approach 1:
The housing is divided into two separable case halves that can be detached from each other. This segmentation allows the weight and elastic member to be accessed and replaced while maintaining structural integrity when assembled. The case halves are joined through mating faces with grooves and projecting walls that provide stable connection.
2Ease of manufacture
If the housing is made into a non-separable unit, then the manufacturing complexity is reduced, but the ease of repair and adjustment deteriorates
Solution Approach 1:
The housing is segmented into case halves that can be easily separated using elastic linking claws and linking holes. This design maintains manufacturing simplicity while enabling easy repair and replacement of internal components like the weight and elastic member without requiring specialized tools or complex disassembly procedures.
3Device complexity
If no mounting part is provided on the housing, then the device complexity is reduced, but the ease of operation and mounting deteriorates
Solution Approach 1:
The mounting part is integrated directly into the case structure, merging the mounting function with the housing. The elastic support member serves dual purposes as both a mounting mechanism and a vibration isolation element, reducing overall device complexity while improving ease of mounting to the seat frame.
4Strength
If the case halves are joined rigidly, then the structural strength is improved, but the ability to allow vibration of the weight deteriorates
Solution Approach 1:
The connection between case halves and the mounting to the frame utilize elastic elements that provide dynamic characteristics. The elastic linking claws allow for controlled movement and vibration of the weight while maintaining structural strength. The elastic support member enables the case to be mounted while allowing the necessary vibration for damping functionality.
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
Enables easy adjustment and alteration of damping characteristics by separating the damper case, simplifying the mounting process, and preventing deformation and foreign matter entry, thus enhancing damping function and ride comfort.
Implementation Method 1
an elastic member that is disposed between the weight and an inner face of the damper chamber so as to allow vibration of the weight
Implementation Method 2
one and the other of the first and second case halves have formed thereon a plurality of pairs of elastic linking claws and linking holes that snap fit together to join the two case halves
Data Source
AI summary
In a seat device for a vehicle, a dynamic damper comprises a damper case that is formed from first and second case halves joined together so as to be capable of separating from each other to define a damper chamber therebetween, a weight that is housed in the damper chamber, and an elastic member that is disposed between the weight and an inner face of the damper chamber so as to allow vibration of the weight, the damper case being provided with a mounting part that is mounted on a frame of the seat. Thus, it is possible to provide a seat device for a vehicle in which replacement of a weight and an elastic member in order to adjust or change the damping characteristics is possible, and the ease of mounting a damper case on a seat is good.