Lumbar Pad Height and Depth Adjustment Using Vertical Operating Force
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Solution Overview
Problem
Conventional chair backrests fail to comfortably support the lumbar region, leading to discomfort and back pain due to inadequate height and depth adjustment mechanisms that require users to stand up and manually adjust the lumbar pad, often resulting in improper positioning and reduced support.
Innovation Solution
A lumbar supporting system with a depth adjuster and multi-stage support rails that allow for vertical operating force-driven height and depth adjustments, enabling users to easily adjust the lumbar pad while seated, using a depth adjustment lever and pad support part with elastic contact for improved support and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the lumbar pad is made of flexible material to increase close-contact force, then comfort is improved, but the lumbar pad bends when the user moves and cannot accurately support the waist
Solution Approach 1:
The lumbar supporting system is divided into multiple independent components: the lumbar pad, pad support part, depth adjuster, and multi-stage support rails. This segmentation allows the rigid support structure to remain stable while the flexible lumbar pad can still conform to the user's waist shape, resolving the contradiction between flexibility and structural stability.
Solution Approach 2:
The system incorporates adjustable depth and height mechanisms that allow the lumbar pad position to be dynamically modified. The depth adjuster with multi-stage support rails enables the lumbar pad to move forward and backward, while the pad support part allows vertical adjustment, ensuring continuous accurate support during user movement.
2Object-affected harmful factors
If a separate sitting mat or cushion is used to support the waist, then comfort is improved, but the cushion is not fixed to the chair and cannot appropriately support the waist when the user moves
Solution Approach 1:
The lumbar pad is integrated with the chair structure through the pad support part, depth adjuster, and multi-stage support rails, forming a unified system. This merging ensures the lumbar pad remains fixed to the chair while maintaining adjustability, eliminating the problem of loose cushions and providing stable support during user movement.
3Object-affected harmful factors
If the lumbar supporting system allows height and depth adjustment, then waist support accuracy is improved, but the manipulation becomes complex and requires two hands or dial operation
Solution Approach 1:
The depth adjustment lever is designed to be operated by the user's foot, allowing self-adjustment without requiring hand operation. The user can easily modify the depth and height of the lumbar pad while seated, making the system user-friendly and eliminating the need for complex two-handed manipulation or dial operations.
4Ease of operation
If the user adjusts the lumbar pad while seated, then adjustment convenience is improved, but the existing mechanisms require the user to stand up and manually adjust
Solution Approach 1:
The depth adjustment lever is positioned and designed to be operated by the user's foot while seated, enabling self-adjustment without requiring the user to stand up. This foot-operated mechanism simplifies the adjustment process and improves accessibility, allowing users to easily modify lumbar pad position during normal seating.
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 precise and comfortable lumbar support tailored to individual body types, reducing user effort and improving support quality by allowing seamless height and depth adjustments without the need to stand up, thereby enhancing user comfort and reducing back pain.
Implementation Method 1
a pad support part including vertical waveform rails configured to be in elastic contact with elastic pieces provided on the horizontal movable member
Data Source
AI summary
Disclosed is a lumbar supporting system of a chair and a chair having the same, and an object to be achieved by the present disclosure is to provide a lumbar supporting system of a chair and a chair having the same, which are capable of accurately supporting a user's waist according to the user's body type by adjusting a height and depth of a lumbar pad by using a vertical operating force.