Patent ID: 9642412
Date: 2017-05-09
CPC Classifications: A42B

Claim:
1. An adjustment mechanism for a headband arrangement having a headband member with at least one headband notched track positioned on an end thereof, the adjustment mechanism comprising: a rotatable knob having at least one first contact member; a rotatable hub member having at least one second contact member and a gear portion with teeth configured to contact the at least one headband notched track of the headband member, such that rotation of the hub member in a first direction causes the headband member to tighten and rotation of the hub member in a second direction causes the headband member to loosen; and a rotatable notched track member comprising a plurality of teeth, wherein the at least one second contact member of the hub member is configured to contact at least a portion of the plurality of teeth of the rotatable notched track member, wherein, upon rotation of the knob in the first direction, contact between the at least one first contact member and at least a portion of the hub member causes the hub member to rotate in the first direction with at least a portion of the hub member interacting with the rotatable notched track member, such that the rotatable notched track member does not rotate, and upon rotation of the knob in the second direction, contact between the at least one second contact member and at least a portion of the rotatable notched track member causes the hub member to rotate in the second direction with at least a portion of the at least one second contact member interacting with the rotatable notched track member, such that the rotatable notched track member rotates in the second direction, and wherein each of the plurality of teeth of the rotatable notched track member comprise a sloped portion and a contact portion, such that when the hub member is turned in the first direction, at least a portion of the hub member slides along the sloped portion of at least one tooth of the plurality of teeth and into contact with the contact portion of the at least one tooth of the plurality of teeth.