摘要:
A bending mechanism comprising a tubular body or linear body having a bending part, a movable part which can move in the lengthwise direction of said tubular body or linear body, two actuators formed to antagonize via said movable part, and a pull wire which extends in the lengthwise direction along the bending part, one end of the wire being fixed to one end side of the bending part and the other end of the wire being fixed to the movable part set at the other end side of the bending part, wherein at least one of the two actuators is a shape memory element, and a stereoscope. The bending mechanism of the present invention is free of displacement of movable part when bending action is not needed, since two actuators are used which antagonize each other via movable part, whereby buckling of the bending part can be prevented. The simple structure of activator unit of the present invention facilitates reduction of the size of the structure. The stereoscope of the present invention is free of buckling of image guide and the like, and angle of convergence can be adjusted easily and a desired three-dimensional view can be obtained easily.
摘要:
Un dispositif s'insérant dans le corps d'un mammifère comporte un tube allongé ou une canule (22), un élément élastique (24) pour infléchir la canule, et un élément de redressement (26) empêchant l'élément élastique (24) d'infléchir la canule. L'élément de redressement (26) et l'élément élastique (24) sont susceptibles d'un mouvement axial relatif, de sorte que l'élément de redressement (26) peut être positionné pour permettre ou interdire à l'élément élastique d'infléchir la canule. De préférence, l'élément élastique (24) est constitué d'un alliage superélastique à mémoire de forme. D'autres versions du dispositif sans élément de redressement sont décrites.
摘要:
A mechanism for bending an elongated body such as the tube of an endoscope without the use of electric elements, thereby eliminating a shock hazard. A shape-momorizing alloy is inserted into the elongated body at portions to be bent. Heat for causing the shape-memorizing alloy and hence the elongated body to bend is produced by frictional heat produced by a mechanism vibrator.
摘要:
A bending operation apparatus is designed such that a bending portion (2) which can be bent/deformed is formed at the distal end of an insertion portion (3), and the proximal end portion of the insertion portion (3) is connected to an operating portion on the manual operation side which serves to remotely control a bending operation of the bending portion (2). The apparatus includes three angle wires (14, 16, 18) arranged in the bending portion (2), three actuators (34, 36, 38) for independently operating the three angle wires (14, 16, 18), and a control means for arbitrarily controlling the operating amounts of the three angle wires (14, 16, 18) through the three actuators (34, 36, 38).
摘要:
A minimally invasive surgical instrument comprising: an elongate shaft having a working end, a proximal end, and a shaft axis between the working end and the proximal end; an end effector; a wrist member having a flexible tube including an axis extending through an interior surrounded by a wall, the wall of the flexible tube including a plurality of lumens oriented generally parallel to the axis of the flexible tube, the wrist member having a proximal portion connected to the working end of the elongate shaft and a distal portion connected to the end effector; and a plurality of actuation cables having distal portions connected to the end effector and extending from the distal portion through the lumens of the wall of the wrist member toward the elongate shaft to proximal portions which are actuatable to bend the wrist member in pitch rotation and yaw rotation.
摘要:
An actuator (12) includes a moving member (18) pivotally connected to a base unit (14) for rotation about an axis. The driving force for rotation of the moving member (18) relative to the base unit (14) is provided by a pair of antagonistically operating shape memory alloy (SMA) wires (48, 50) and transmitted via a torsional spring (56). An endoscope, or a snake-like robot (66), may include one or more of the actuators (12).
摘要:
The present invention is directed to an articulate minimally invasive surgical endoscope with a flexible wrist having at least one degree of freedom. When used with a surgical robot having a plurality of robot arms, the endoscope can be used with any of the plurality of arms thereby allowing the use a universal arm design. The endoscope in accordance to the present invention is made more intuitive to a user by attaching a reference frame used for controlling at least one degree of freedom motion to the flexible wrist for wrist motion associated with at least one degree of freedom. The endoscopie in accordance to the present invention attenuates indesirable motion at its back/proximal end by acquiring the image of the object in association with at least one degree of freedom based on a reference frame rotating around a point of rotation located proximal to the flexible wrist.