Direct acting extensible and retractable arm mechanism, and robot arm provided with direct acting extensible and retractable arm mechanism
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United States of America Patent
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Feb 2, 2016
Grant Date -
Mar 21, 2013
app pub date -
May 25, 2011
filing date -
May 31, 2010
priority date (Note) -
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Abstract
A robot arm (50) of the present invention includes, as a direct acting extensible/retractable joint (J3), an arm section (2) constituted by an upper structure group (20) and a lower structure group (21). Groups (20) and (21), having an arrangement in which structures are connected in series, partially engage so as to form a direct rigid combined structure, and are separated so as to release the rigid structure. An arm length can be adjusted arbitrarily. Section (2) can have a plane surface having no gap to prevent entry of a finger/dust. Separation of Groups (20) and (21) allows an upper structure (22) and a lower structure (23) to rotate around their rotational axes, to realize compact storage inside a robot arm supporting member (1). It is thus possible to prevent significantly entry of a finger/dust, and provide a compact direct acting extensible and retractable arm mechanism.
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