Chair Bottom Plate Structure for Adjustable Back and Seat Support
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Solution Overview
Problem
Conventional chairs lack adjustable elastic support, inadequate back rack adjustment options, and unchangeable seat frame angles, failing to accommodate varying user preferences and comfort needs.
Innovation Solution
A bottom plate structure with an elastic support device, slanting device, and adjusting device, featuring resilient sheets, pivoting components, and adjustable mechanisms to customize elastic force, back rack angle, and seat frame inclination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional elastic component is used to connect the bottom plate and back rack, then the back rack can provide elastic support for relaxation, but the elasticity is fixed and unadjustable causing fatigue when users lean for long periods
Solution Approach 1:
The patent applies the dynamics principle by making the elastic component adjustable rather than fixed. The resilient sheet can be repositioned along the back rack with multiple positioning holes, allowing users to dynamically adjust the elastic support level according to their needs and usage duration, transforming a static system into a dynamic one that adapts to changing conditions
Solution Approach 2:
The patent implements parameter changes by modifying the effective length and tension of the resilient sheet. By changing the connection position on the back rack through different positioning holes, the elastic parameter of the component is adjusted, allowing the same physical component to provide different levels of elasticity suitable for various usage scenarios
2Adaptability or versatility
If the back rack provides only two adjusting positions (vertical and specific back inclined angle), then the structure is simple, but the adjusting function is inadequate for different usage conditions
Solution Approach 1:
The back rack is designed with multiple positioning holes arranged at different angles, enabling dynamic adjustment between vertical position, back inclined angle, and other intermediate positions. This transforms a static two-position system into a dynamic multi-position system that adapts to various usage conditions
Solution Approach 2:
The adjustment mechanism is segmented into discrete positioning holes along the back rack, allowing independent selection of different angular positions. This segmentation enables fine-grained control over the back rack angle while maintaining structural simplicity through standardized hole patterns
3Adaptability or versatility
If the seat frame is mounted securely on the bottom plate with a fixed front inclined angle, then the structure is stable, but users with different heights cannot find suitable angles for comfort
Solution Approach 1:
The seat frame connection is designed to be dynamically adjustable rather than permanently fixed. The adjustable connection mechanism allows users to modify the front inclined angle according to their height and comfort preferences, transforming a static configuration into an adaptable one
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 adjustable comfort settings for different users by modifying elastic support, back rack angle, and seat frame inclination, enhancing user experience and accommodating diverse user requirements.
Implementation Method 1
an elastic component is applied to connect the bottom plate and the back rack. When the user leans against a backrest of the back rack, the elastic component is stretched and the back of the users can be stretched. When the user no longer leans against a backrest of the back rack, the back rack is repositioned to the original position by the elastic component.
Data Source
AI summary
A bottom plate structure of a chair has a bottom plate, a back rack and a seat frame. The bottom plate has an elastic support device, a slanting device and an adjusting device. The elastic support device has at least one resilient sheet mounted in the bottom plate, an adjusting component mounted in the bottom plate, and a supporting base connected to the adjusting component. The slanting device has a pivoting component connected to the back rack, a transmission seat mounted in the bottom plate, and two fastening members connected to the bottom plate. The pivoting component has two pivoting arms. The transmission seat has a pulling component connected to the transmission seat. The adjusting device is mounted between the bottom plate and the seat frame, and has a back pivoting component and a front adjusting component mounted on the seat frame and the bottom plate.