초록 ▼

A positioning unit having two arms and three joints whereby a payload carried by the positioning unit at one of the joints can be moved into a desired position. Each joint has locking and releasing means by which the arms can be moved when the locking and releasing means are released and maintained

A positioning unit having two arms and three joints whereby a payload carried by the positioning unit at one of the joints can be moved into a desired position. Each joint has locking and releasing means by which the arms can be moved when the locking and releasing means are released and maintained in a desired position when the locking and releasing means are locked. The locking and releasing of the joints is controlled by two controllers both of which can be actuated simultaneously by a single human hand.

대표청구항 ▼

[ What is claimed:] [1.] A positioning unit comprising:mounting means for mounting said positioning unit to a stationary surface;a first arm;a second arm;control means for controlling, upon actuation by a single human hand:(a) locking of said first arm and said second arm against movement of said fi

[ What is claimed:] [1.] A positioning unit comprising:mounting means for mounting said positioning unit to a stationary surface;a first arm;a second arm;control means for controlling, upon actuation by a single human hand:(a) locking of said first arm and said second arm against movement of said first arm and said second arm, and(b) selective releasing of said first arm and said second arm to permit movement of said first arm and said second arm;a first joint for coupling said first arm to said mounting means for:(a) rotational movement of said first arm relative to said mounting means about a first vertical axis, and(b) pivotal movement of said first arm relative to said mounting means about a first horizontal axis, having first locking and releasing means for:(a) preventing:(1) rotational movement of said first arm relative to said mounting means about said first vertical axis, and(2) pivotal movement of said first arm relative to said mounting means about said first horizontal axis, and(b) selectively permitting:(1) rotational movement of said first arm relative to said mounting means about said first vertical axis, and(2) pivotal movement of said first arm relative to said mounting means about said first horizontal axis;a second joint for coupling a payload to said second arm for:(a) pivotal movement of the payload relative to said second arm about a second horizontal axis, and(b) rotational movement of the payload relative to said second arm about an axis perpendicular to said second horizontal axis, having second locking and releasing means for:(a) preventing:(1) pivotal movement of the payload relative to said second arm about said second horizontal axis, and(2) rotational movement of the payload relative to said second arm about said axis perpendicular to said second horizontal axis, and(b) selectively permitting:(1) pivotal movement of the payload relative to said second arm about said second horizontal axis, and(2) rotational movement of the payload relative to said second arm about said axis perpendicular to said second horizontal axis;a third joint at which said first arm and said second arm are coupled together for relative pivotal movement between said first arm and said second arm about a third horizontal axis and having third locking and releasing means for:(a) preventing relative pivotal movement between said first arm and said second arm about said third horizontal axis, and(b) selectively permitting relative pivotal movement between said first arm and said second arm about said third horizontal axis; andconnecting means for connecting said control means to:(a) said first locking and releasing means to:(1) release said first locking and releasing means upon actuation of said control means, and(2) lock said first locking and releasing means upon deactuation of said control means,(b) said second locking and releasing means to:(1) release said second locking and releasing means upon actuation of said control means, and(2) lock said second locking and releasing means upon deactuation of said control means, and(c) said third locking and releasing means to:(1) release said third locking and releasing means upon actuation of said control means, and(2) lock said third locking and releasing means upon deactuation of said control means.