Rotation support mechanism and laser device

摘要

The object is to provide a rotation support mechanism capable of adjusting a load acting on an inclinable and rotatable arm section to improve the operability of the arm section. The rotation support mechanism supports a protect pole with respect to a device main body such that the protect pole is inclinable and rotatable about a rotation axis as a rotation center. The rotation support mechanism includes a tensile spring for supplying the protect pole with a rotation urging force for directing the protect pole from an inclined state toward a most upright state in accordance with the inclination angle of the protect pole about the rotation axis as the rotation center, and also includes a cam surface for adjusting the rotation urging force to a desired rotation urging force in accordance with the inclination angle.

主权项

1. A rotation support mechanism for supporting an arm section with respect to a housing such that the arm section is inclinable and rotatable about a rotation axis as a rotation center, the rotation support mechanism comprising:
an urging section for supplying the arm section with a rotation urging force for directing the arm section from an inclined state toward an upright state in accordance with an inclination angle of the arm section about the rotation axis as the rotation center; and an urging force adjusting section for adjusting the rotation urging force to a desired rotation urging force in accordance with the inclination angle, wherein the urging section includes a pulling and urging member including, at least in a part thereof a pulling and urging section having an urging force increasing in proportion to a tensile amount, one of two ends of the pulling and urging member is located on a side of one of the arm section and the housing, and the other of the two ends of the pulling and urging member is located on a side of the other of the arm section and the housing, and the urging force adjusting section includes a cam rotatable about the rotation axis as the rotation center along with an inclination and rotation motion of the arm section and comprising a cam surface along which a part of the pulling and urging member in a length direction from the one end to the other end is extended, wherein the tensile amount of the pulling and urging member is adjusted in accordance with an eccentric distance of the cam surface from the rotation axis such that rotation tensile force of the pulling and urging member is adjusted.