Gas spring device for adjusting the height of a chair, and chair with such a gas spring device
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Solution Overview
Problem
Height-adjustable chairs equipped with gas springs can become electrostatically charged, making them unsuitable for use in areas like clean room environments where static electricity is a concern.
Innovation Solution
A gas spring device with conductive components that bridge non-conductive or poorly conductive materials, allowing electrical charges to be dissipated to the ground, preventing static charging by establishing a conductive path through the use of conductive connecting elements and materials like metal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If non-conductive or slightly conductive materials are used for the guide device and bearing, then friction and wear are reduced, but electrostatic charging occurs
Solution Approach 1:
Conductive connecting elements are introduced as intermediary components between the non-conductive guide device and the conductive tubular elements. These connecting elements bridge the electrical insulation gap, providing a controlled path for electrostatic discharge while preserving the friction-reducing properties of the non-conductive materials in the guide and bearing components.
Solution Approach 2:
The patent applies different electrical conductivity properties to different parts of the gas spring device. The guide device and bearing remain non-conductive or slightly conductive to minimize friction, while specific connecting elements are made conductive to manage electrostatic charges. This localized differentiation of material properties resolves the contradiction by allowing each component to optimize for its primary function.
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
The solution effectively prevents static charging of the chair and user, enabling safe use in environments where electrostatic discharge is undesirable, such as clean rooms.
Implementation Method 1
a first connecting element made of an electrically conductive material is provided which connects the first tubular element and the second tubular element to one another in an electrically conductive manner, and wherein a second connecting element made of an electrically conductive material is provided between the second tubular element and the third tubular element in such a way as to bridge the bearing and to provide an electrically conductive connection between the second tubular element and the third tubular element
Data Source
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AI summary
The present invention relates to a gas spring device for a chair, comprising: a gas spring arrangement, a first tubular element made of an electrically conductive material, in which the gas spring arrangement is accommodated, a second tubular element made of an electrically conductive material, the second tubular element having a guide device in which the first tubular member is received, the guide means being electrically non-conductive or only slightly conductive; a third tubular element made of an electrically conductive material, which has a bearing, in particular made of an electrically non-conductive or only slightly conductive material, for bearing the second tubular element.