Olympus Corporation

Mitsubishi Electric Corporation

Koji Nishizawa

Kazuo Banju

Yoshihiro Miyama

Takahiro Kogasaka

Hideaki Arita

Tatsuo Nishimura

Masaya Inoue

Shinji Nishimura

Hitoshi Isoda

Tatsutoshi Hashimoto

A rotation angle detection device, including: a rotor; a stator including one bias magnetic field generation portion (BMFGP) and magnetic detection elements; and a rotation angle calculation processor calculating a rotation angle of the rotor from detection signals of the detection elements, wherein a surface of the rotor has convex and concave portions (CCPs), which change in 'x' ('x'&#x2265;1) cycles for a mechanical angle of 360, and a shape of the CCPs make the detection elements possible to obtain a sine wave, and wherein &#x201c;a&#x201d; (&#x201c;a&#x201d;&#x2265;2) detection elements are arranged along a circumferential direction of the stator at equal intervals for one cycle of the CCPs&#x2014;so as to be opposed to the surface of the rotor, and the BMFGP extends in the circumferential direction for one cycle of the CCPs so as to overlap with the &#x201c;a&#x201d; detection elements.

Rotation angle detection device and rotation angle detection method

A rotation angle detection device including: a rotor; a stator including 'b' (b&#x2265;3) magnetic detection portions (MDPs) each including a bias magnetic field generation portion and a magnetic detection element (MDE); and a rotation angle processor calculating a rotation angle of the rotor based on a detection by the (MDEs). The rotor has convex and concave portions (CCPs), which change in 'x' cycles for a mechanical angle 360 (&#x201c;x&#x201d;&#x2265;1) to make the MDEs possible to obtain a sine wave. There are arranged &#x201c;b&#x201d; MDPs along a circumferential direction of the stator for each cycle of the CCPs, which are arranged at intervals of a mechanical angle 360&#xd7;(n&#xd7;b+m)/(x&#xd7;b), where &#x201c;n&#x201d; (n&#x2265;0) represents, by a number of cycles, a deviation amount of each of the MDPs from a reference position in the circumferential direction, and &#x201c;m&#x201d; (1&#x2264;m&#x2264;&#x201c;b&#x201d;) represents a position of a MDP in an arrangement order.

A medical system having a first insertable instrument having a first image sensor; a second insertable instrument having a second image sensor; a first arm configured to move the first insertable instrument; and a controller configured to: acquire a position and orientation of the second insertable instrument in a predetermined coordinate system; calculate a position and direction of an optical axis of the second image sensor based on the position and orientation of the second insertable instrument; acquire a position and orientation of the first insertable instrument in the predetermined coordinate system; calculate a first operation amount of the first arm to move the first image sensor such that the optical axis of the second image sensor substantially coincides with an optical axis of the first image sensor, based on the position and orientation of the first insertable instrument; and control the first arm based on the first operation amount.

System for moving first insertable instrument and second insertable instrument, controller, and computer-readable storage device

A medical port includes: a faceplate having a through-hole; an elastic member formed in a curved shape and configured to clamp and fix a living tissue between the elastic member and the faceplate; and a string-shaped member fixed at a first end to the elastic member and extending from the elastic member through the faceplate. The elastic member is configured such that extension of the string-shaped member through the faceplate in a direction opposite to the elastic member reduces an outer diameter of the curved shape of the elastic member.

Medical port

A multi-degree-of-freedom forceps includes a insertion portion that has a first bending portion and a second bending portion connected to each other at both ends via an operating member; a treatment portion that is attached to the first bending portion and is used for tissue treatment; and an operating portion that is attached to the second bending portion to bend the second bending portion to thereby bend the first bending portion. The operating portion has a handle body capable of being swung relative to the insertion portion with the second bending portion as an operation center. The handle body has a grip portion that is gripped by a user in use. The grip portion is provided around the operation center or closer to the insertion portion side than the operation center.

Multi-degree-of-freedom forceps

A medical port includes: a faceplate having a through-hole; a fixing ring formed in an annular shape and having an outer circumferential surface in which an outer diameter is gradually increased from a first opening end opened at a faceplate side toward a second opening end opened at an opposite side of the faceplate side; and a moving member connected to the fixing ring and the faceplate and configured to move the fixing ring with respect to the faceplate such that the fixing ring is pulled toward the faceplate.

Growing community of inventors

Tokyo, Japan

Koji Nishizawa