Abstract: A medical device according to the present invention is to be arranged in a lumen of a gastrointestinal tract. The medical device includes: at least one cylindrical part which is opened at least one end thereof; and at least one attachment part which is arranged on at least one portion of the cylindrical part and is configured such that the medical device is attachable to the lumen of the gastrointestinal tract. The cylindrical part is configured to be arrangeable along at least one portion of the gastrointestinal tract, and at least one portion of a side surface of the cylindrical part is configured to be followable to a shape of an inner wall of the gastrointestinal tract.

Abstract: A testing device according to the present invention includes a housing including a skin surface sheet and an upper surface cover. A hollow needle configured to interlock with the upper surface cover and a testing reagent or equipment are accommodated in the housing. Through deformation of the upper surface cover by application of an external force, the hollow needle perforates the skin. A body fluid flows in the space inside of the housing and is brought into contact with the testing reagent or equipment to acquire information on the body fluid. Through recovery of the upper surface cover to an original shape by elimination of the external force, the hollow needle again becomes accommodated in the housing.

Abstract: A medical device according to the present invention is to be arranged in a lumen of a gastrointestinal tract. The medical device includes: at least one cylindrical part which is opened at least one end thereof; and at least one attachment part which is arranged on at least one portion of the cylindrical part and is configured such that the medical device is attachable to the lumen of the gastrointestinal tract. The cylindrical part is configured to be arrangeable along at least one portion of the gastrointestinal tract, and at least one portion of a side surface of the cylindrical part is configured to be followable to a shape of an inner wall of the gastrointestinal tract.

Abstract: A testing device according to the present invention includes a housing including a skin surface sheet and an upper surface cover. A hollow needle configured to interlock with the upper surface cover and testing means are accommodated in the housing. Through deformation of the upper surface cover by application of an external force, the hollow needle perforates the skin. A body fluid flows in the space inside of the housing and is brought into contact with the testing means to acquire information on the body fluid. Through recovery of the upper surface cover to an original shape by elimination of the external force, the hollow needle again becomes accommodated in the housing.

Abstract: An optical device may include a movable body holding a lens, a fixed body movably holding the movable body, a drive magnet and a drive coil for relatively moving the movable body with respect to the fixed body, and a metal member fixed to the drive magnet. The drive magnet is fixed to one of the movable body and the fixed body and the drive coil is fixed to the other of the movable body and the fixed body. A nickel plating layer containing at least nickel is formed on a surface of the drive magnet and a surface of the metal member, and the drive magnet and the metal member are joined to each other by a joining layer which is made of tin-based metal containing at least tin and is disposed between the drive magnet and the metal member.

Abstract: An optical device may include a movable body holding a lens, a fixed body movably holding the movable body, a drive magnet and a drive coil for relatively moving the movable body with respect to the fixed body, and a metal member fixed to the drive magnet. The drive magnet is fixed to one of the movable body and the fixed body and the drive coil is fixed to the other of the movable body and the fixed body. A nickel plating layer containing at least nickel is formed on a surface of the drive magnet and a surface of the metal member, and the drive magnet and the metal member are joined to each other by a joining layer which is made of tin-based metal containing at least tin and is disposed between the drive magnet and the metal member.

Abstract: An ink reservoir mechanism includes a ink reservioring portion for directly reservoiring ink to be supplied to an ink jet recording head, the ink reservoiring portion having a reservoiring volume which reduces with consumption of the ink and being provided with an air-liquid separation device; a negative pressure source, having a variable inner volume, for normally applying a negative pressure to the ink reservoiring portion through the air-liquid separation device; and a connection path for connecting the negative pressure source and the ink reservoiring portion through the air-liquid separation device.

Abstract: An ink reservoir mechanism includes a ink reservioring portion for directly reservoiring link to be supplied to an ink jet recording head, the ink reservoiring portion having a reservoiring volum which reduces with consumption of the ink and being provided with an air-liquid separation device; a negative pressure source, having a variable inner volume, for normally applying a negative pressure to the ink reservoiring portion through the air-liquid separation device; and a connection path for connecting the negative pressure source and the ink reservoiring portion through the air-liquid separation device.

Abstract: A magnetoresistive element may include an A-phase magnetoresistive pattern which outputs a signal, a B-phase magnetoresistive pattern which outputs another signal whose phase is different by 90° from a phase of the signal outputted from the A-phase magnetoresistive pattern, a first substrate on which the A-phase magnetoresistive pattern is formed, and a second substrate on which the B-phase magnetoresistive pattern is formed. At least one of the first and the second substrates may include a transparent substrate.

Abstract: The bearing apparatus used in the motor comprises a rotary shaft, a cylindrical-shaped radial bearing, and a thrust bearing for supporting the lower end portion of the rotary shaft. The rotary shaft is composed of a pipe made of stainless steel and a resin member for closing the lower end portion of the pipe. A groove for generation of dynamic pressure is not formed in the inner peripheral surface of the radial bearing or in the inner peripheral surface of the rotary shaft either. On the upper end portion of the rotary shaft, there is mounted a fan which, due to the rotation of the rotary shaft, takes in the air into the rotary shaft and, in the peripheral surface of the rotary shaft, there are formed blow-out holes for blowing out the air taken in by the fan from the outer peripheral surface of the rotary shaft.

Abstract: An optical head apparatus includes a wiring substrate and an apparatus frame that is made of a resin or another damper material. Optical components that form an optical system are mounted on the wiring substrate. On the other hand, components such as wire suspensions and yoke plate of an object lens driving mechanism, which is a source of vibration, are mounted on the apparatus frame. The apparatus frame is attached to the surface of the wiring substrate. Vibration that may be generated in the object lens driving mechanism is absorbed by the apparatus frame having a damper function, and therefore do not transfer to the optical components mounted on the wiring substrate.

Abstract: In accordance with the invention, an optical head device comprises a light source, a light receiving element, an optical system that guides light emitted by the light source to an optical recording medium and also guides the light reflected from the optical recording medium to the light receiving element and a base on which the light source, the light receiving element and optical elements constituting the optical system are mounted. An element holder composed of a photosensitive glass is mounted on the base. The element holder has a positioning portion(s) therein for at least one of the optical elements. The base has openings therein at locations through which the optical elements can be assessed from the back thereof.

Abstract: A light source device for an optical head apparatus comprises at least one laser diode chip and a semiconductor substrate integral with the laser chip. The light source device is formed in a recess of the semiconductor substrate for aligning the laser diode chip on a surface of the semiconductor substrate by a semiconductor processing technique. The recess comprises a first side surface for defining a laser beam emitted from the laser diode chip in an optical axial direction and a second side surface for defining a direction perpendicular to the optical axial direction.

Abstract: An air dynamic pressure bearing includes a shaft element, a bearing element relatively rotatably supporting the shaft element, and dynamic pressure generation grooves for generating a dynamic pressure by air formed between opposing surfaces of the shaft element and the bearing element. The bearing element is formed from a sintered alloy, and a solid lubricant material is disposed on the opposing surface of at least one of the shaft element and the bearing element.