chair

The chair addresses the issue of load distribution and lumbar support by incorporating a hinge-connected backrest frame that rotates and moves with the user's load, enhancing seating comfort and support.

JP2025508163AActive Publication Date: 2025-03-21SIDIZ INC
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Patent Information

Application Number
JP2024554724
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2022-03-17
Publication Date
2025-03-21
Estimated Expiration
2042-03-17

AI Technical Summary

Technical Problem

Existing chairs with backrests that arch backward do not effectively distribute the user's load, leading to localized pressure and inadequate support when the user tilts the backrest, causing the lumbar to move away from the waist.

Method used

A chair design featuring a backrest frame with a hinge connection to a back plate post, a back plate slider, and a back plate connector that allows the backrest frame to rotate and move in the direction of the user's load, ensuring the entire backrest supports the user's load and maintains contact with the user's back and waist.

Benefits of technology

The chair improves seating comfort by evenly distributing the user's load across the backrest, preventing localized pressure and ensuring the lumbar provides adequate support to the waist, even when tilting.

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Abstract

When adjusting the front-rear angle of the backrest, the backrest frame is warped to prevent the lumbar from moving away from the user's waist, thereby enabling the entire backrest to support the user's weight, and dispersing the user's weight applied to the backrest, thereby improving the seating comfort. [Solution] To this end, the chair according to the present invention includes a backrest frame that supports the backrest, a back panel post to which the lower end of the backrest frame is hinged and which can rotate back and forth around the lower end as the center of rotation, a back panel slider that is connected to the back panel post above the hinge so that it can slide up and down, and a back panel connector that connects the backrest frame and the back panel slider, and the back panel connector moves the backrest frame in the direction in which the user's weight acts.
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