| US 7,536,931 B2 | ||
| Articulated arm | ||
| Tamotsu Saito, Osaka (Japan) | ||
| Assigned to Pegasus Sewing Machine Mfg. Co., Ltd., Fukushima-ku, Osaka-shi, Osaka (Japan) | ||
| Filed on Oct. 26, 2005, as Appl. No. 11/258,028. | ||
| Claims priority of application No. 2004-311786 (JP), filed on Oct. 27, 2004; and application No. 2005-219831 (JP), filed on Jul. 29, 2005. | ||
| Prior Publication US 2006/0086516 A1, Apr. 27, 2006 | ||
| Int. Cl. B25J 17/00 (2006.01) | ||
| U.S. Cl. 74—490.05 [901/28] | 12 Claims |
| 1. An articulated arm comprising:
a first arm member and a second arm member flexibly coupled mutually by a joint,
a plurality of through-holes provided in the first arm member in the longitudinal direction,
a plurality of holding holes provided at one end of the second arm member facing the first arm member so as to face the through-holes,
a plurality of elastic elements inserted into the holding holes at the leading end side of the elastic elements, and into
the through-holes the rear end side of the elastic elements,
said plurality of elastic elements each defining a rear end portion, and
a plurality of support shafts inserted, to be selectively movable back and forth, in the through-holes behind said rear end
portion of the elastic elements, in which a certain support shaft out of the plurality of support shafts moves forward to
push the elastic element toward the second arm member, and another support shaft moves backward corresponding to the second
arm member pushed by the advancing elastic element and flexed through the joint, and thereby the elastic element moves backward.
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