A chair equipped with a back support and a rotating top rail that fits the back.

The chair addresses the issue of instability and discomfort in upright positions by using a backrest with rotating components to support the lower back and pelvis, ensuring comfort and stability across various postures with a simple and affordable design.

JP3253009UActive Publication Date: 2025-09-29渡邊 宏
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Patent Information

Application Number
JP2025002569U
Authority / Receiving Office
JP · JP
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2025-07-30
Publication Date
2025-09-29
Estimated Expiration
2035-07-30

AI Technical Summary

Technical Problem

Existing chairs fail to provide adequate support for the lower back and stabilize the pelvis in an upright posture, leading to instability and discomfort, while also lacking a simple structure that supports various sitting positions at low cost.

Method used

A chair design featuring a backrest composed of two spine pillars with a back beam and a top rail that can rotate, providing firm support for the lower back and stabilizing the pelvis in an upright position, and adapting to different postures through a rotating top rail for comfort and relaxation.

Benefits of technology

The chair offers stable and comfortable seating experiences in both upright and reclined positions, enhancing concentration and reducing fatigue by supporting the lower back and pelvis, while maintaining a simple and cost-effective structure.

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Abstract

To provide a chair which firmly supports the lower back and stabilizes the pelvis when working, etc., where an upright posture is often taken, and which quickly fits the back and optimally supports the spine when relaxing, such as when watching television, where various backward-leaning postures are taken, and which can achieve both stability and comfortable sitting comfort according to the usage scene. [Solution] Two back pillars 14L, 14R extend upward from the rear of the seat body 11, and a back brace 15 that abuts the occupant's waist is connected left and right to the lower part between the two back pillars, and a top board 16 that abuts the occupant's back is connected left and right to the upper part between the two back pillars via support shafts 18L, 18R so that it can rotate forward and backward.
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