Multilayer wind spring for a display support and lifting support thereof
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United States of America Patent
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Dec 29, 2020
Grant Date -
Jul 23, 2020
app pub date -
Sep 4, 2017
filing date -
Jul 7, 2017
priority date (Note) -
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status (Latency Note)
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Abstract
A multilayer wind spring for a display support and a lifting support thereof, the multilayer wind spring is formed by winding a plurality of tightly attached elastic metal sheets, wherein each of the elastic metal sheets comprises a stretching connection portion, a movable sheet portion and an unmovable wound portion, part or all of the elastic metal sheets are provided with a semi-restricted structure which is provided to have a movement allowance in an unwinding or winding direction of the elastic metal sheets, and in an unwinding or winding process of the multilayer wind spring, the stretching connection portion of the elastic metal sheets provided with the semi-restricted structure is arranged to be slidable within a range of the movement allowance relative to a connected component.
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