Adjusting mechanism for adjusting a restoring force acting on the backrest of a chair, and office chair provided with such an adjusting mechanism
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United States of America Patent
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May 22, 2018
Issued Date -
N/A
app pub date -
Dec 17, 2015
filing date -
Dec 19, 2014
priority date (Note) -
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Abstract
The adjusting mechanism serves for the setting of a restoring force acting on the backrest of a chair. A back support and a seat support are fastened on a support. A setting mechanism configured in the manner of scissors is provided for the weight setting. Said setting mechanism has two scissor arms which are connected to one another via a scissor pin. One of said scissor arms is formed by a spring element and is fastened with its front-side spring end on said support. The back spring end is fastened on said scissor pin. Said first scissor arm is connected to said back support in the manner of a connecting rod. An active lever length is defined between said scissor pin and a support pin about which said back support is mounted pivotably. A compact construction mode is achieved by the configuration of said scissor arm as a spring element.
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