Abstract: A display device according to the present invention is a light stippling display device that performs light stippling. In the device, a plurality of hole portions are formed on a display plate portion including a magnetized sheet which is magnetized on both sides, and the hole portion is opened and closed by a light shielding body made of a magnetic ball. Thereby, the position of the light shielding body is switched between a light transmitting state and a light shielding state. The light shielding body has directivity for a center of the hole portion in the display plate portion which is magnetized on both sides in a case where the light shielding body is switched to the light shielding state. Therefore, the reliability of display can be improved, and the operability can be improved.

Abstract: A light-drawing type display apparatus according to the present invention is formed by: a plate provided in the front side of the apparatus and having a plurality of light-transmitting small holes and standing upright; each light-cutting member is provided to each of the small holes of the plate in order to open or close each of the small holes; and a light source provided to the rear of the light-cutting members for irradiating the whole of the plate; wherein the light-cutting members are moved by using a predetermined writing means so that the light-transmitting small holes are opened, and the light from the light source is transmitted to the front side, then, characters or pictures are drawn on the plate; and wherein the light-cutting members are moved by using a predetermined erasing means so that the light-transmitting small holes are closed, and the light from the light source is cut off, then, characters or pictures are erased from the plate.

Abstract: A surgical cutting instrument essentially comprises an outer sheath tube, an inner stationary tube which is disposed within said outer sheath tube such that the distal end of the inner tube projects from the distal end of the outer sheath tube and is provided with a cutting opening for drawing cut tissue chips at the peripheral wall of the distal end of the inner tube and a sliding member which is slidably disposed between said outer sheath tube and said inner tube so as to open and close said cutting opening and is provided with an outer cutting edge which engages an inner cutting edge of said cutting opening, on the distal end edge of the sliding member, whereby a body tissue is cut by axially and slidingly reciprocating said sliding member to open and close said cutting opening and cut tissue chips are withdrawn from the body by suction through a suction channel of the inner tube.