Structure For adjusting inside Circumference of Helmet
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Mar 4, 2010
app pub date -
Sep 1, 2008
filing date -
Sep 1, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A structure for adjusting inside circumference of a helmet is implemented as a strap assembly coupled to a rear side of a safety helmet or bicycle helmet and includes a casing and a cover fitted therein. The cover is sequentially connected with a transmission gear, a resilient element, a positioning gear and a knob. By pressing the knob, the positioning gear is disengaged from toothed portions on an inner periphery of the cover, thereby allowing the knob to rotate an end of the transmission gear. Consequently, a first driving portion of the transmission gear drives two straps inserted in the casing to move toward or away from each other. The knob is released after a relative position of the straps is adjusted. The resilient element returns the positioning gear into engagement with the toothed portions on the inner periphery of the cover.
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