04-10-2018 дата публикации
Номер: US20180279726A1
Принадлежит:
The present invention provides a pole shaft device including an outer shaft (); an inner shaft () which is disposed in the outer shaft () and slides along the inside of the outer shaft (); a fixing member () which is fixed on the inner shaft () and has an inclined surface formed in the circumferential direction thereof; and an extension member () which is coupled to the outer shaft () so as to be movable in the longitudinal direction thereof, and is extended by friction with the inclined surface so as to fix the outer shaft () and the inner shaft (). 1. A pole shaft device , comprising:{'b': '10', 'an outer shaft ();'}{'b': 20', '10', '10, 'an inner shaft () which is disposed in the outer shaft () and slides along the inside of the outer shaft ();'}{'b': 30', '20, 'a fixing member () which is fixed on the inner shaft () and has an inclined surface formed in the circumferential direction thereof; and'}{'b': 40', '10', '10', '20, 'an extension member () which is coupled to the outer shaft () so as to be movable in the longitudinal direction thereof and extended by friction with the inclined surface so as to fix the outer shaft () and the inner shaft ().'}230. The pole shaft device of claim 1 , wherein the fixing member () includes:{'b': '32', 'a fixing body ();'}{'b': 34', '32', '21', '20, 'an inner fixing portion () which is formed in the fixing body (), inserted to the inner hollow (), and coupled with the inner shaft (); and'}{'b': 35', '32', '40', '40', '40, 'an inclined surface () which is formed in the fixing body (), formed in the circumferential direction thereof, installed with the extension member (), and interferes with the extension member () during rotation to press the extension member ().'}3. The pole shaft device of claim 2 , further comprising:{'b': 38', '30', '40', '40', '30, 'a stop ring () which is installed on the fixing member () and prevents the extension member () from moving in the longitudinal direction to prevent the extension member () from ...
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