Abstract:
A curved surface cutting method in which a surface of a material is cut by a bite to form a specified curved surface, a cutting edge of the bite is provided with a flat section and corner sections at both ends of the flat section; the posture of the cutting edge of the bite is adjusted such that a ridge line along the flat section of the cutting edge of the bite is in parallel with a tangent drawn at the curved surface; and the surface of the material is cut with the cutting edge of the bite retained in the posture while feeding the cutting edge in a predetermined feeding direction, thereby forming a first band-like cut surface having a width corresponding to the width of the cutting edge of the bite. Each time the band-like cut surface is completed, the cutting edge of the bite is separated from the surface of the material, the cutting edge of the bite is moved in a direction perpendicular to the predetermined feeding direction by a distance shorter than the width of the cutting edge of the bite, and another band-like cut surface is formed at a position adjacent to the first band-like cut surface.
Abstract:
The present invention provides for a optical head device having a beam-guiding optical device to bring beams of different wavelengths which are emitted by separate light sources together onto the same optical axis or to guide the beams onto a common photo receiving device. The beam-guiding optical device includes an incident plane and an exit plane and the incident plane and the exit plane are back to back. One of the incident plane and the exit plane has a stair-like surface wherein a step height between neighboring treads in the stair-like surface is set to cause a phase difference of n wavelength to one of the beams passing through the neighboring treads and n is equal to 1, 2, 3 . . . .
Abstract:
A linear actuator includes an inner yoke, an outer yoke and a coil for generating a magnetic field between the outer yoke and the inner yoke. The outer yoke includes a first facing portion facing the inner yoke and a second facing portion which faces the inner yoke. An insulating coil bobbin around which the coil is wound includes an engaging part which engages with both the first facing portion and the second facing portion of the outer yoke. A magnet is disposed between the inner yoke and the outer yoke and a movable body is integrally connected with the magnet. An alternating magnetic field is generated by the coil such that the movable body along with the magnet is reciprocally moved in the axial direction in conjunction with the alternating magnetic field.
Abstract:
A valve driving device includes a plurality of valve bodies that are simultaneously driven. Driven gears are disposed symmetrically with respect to an axis of the a common gear. Rubber valve bodies which are separate from the driven gears are disposed on the lower surfaces of the driven gears. The valve bodies are slidably aligned with a valve seat which is formed by smoothly denting a valve seat plate. The driven gears are brought into contact with the valve seat under pressure by one leaf spring member to open or close communication holes (valve openings) thereby interrupting or opening a flow-path from an inflow hole.
Abstract:
A card reader may comprise a power supply part for the card reader, a peripheral device including at least an inlet part for connecting a power cable to the power supply part from outside, a card reader part, a lower case for housing the power supply part and the peripheral device which is disposed in a linear manner, an upper case for housing the card reader part, and a recessed part for allowing the power cable to be inserted into the inlet part for connection. The inlet part and the recessed part for allowing the power cable to insert into the inlet part may be arranged in a linear manner and parallel to the power supply part.
Abstract:
An objective lens drive device includes an objective lens, a lens holder holding the objective lens, a fixed side member supporting the lens holder with a plurality of wires in a movable manner, a focusing and tracking drive mechanism, and a tilt drive mechanism for driving the lens holder in a tilt direction. The tilt drive mechanism includes at least a tilt drive coil disposed at one place which is mounted on either side of the lens holder and the fixed side member and at least a tilt drive magnet disposed at one place so as to be opposed to the tilt drive coil on an other side of the lens holder and the fixed side member.
Abstract:
An electrolytic machining method for electrolytically machining a workpiece is provided. The method uses a masking member having through-hole patterns that correspond to the shapes of concave parts to be formed in the workpiece. The masking member is brought in contact with a machining surface of the workpiece. An electrolytic solution is supplied and allowed to flow in the gap between the masking member and an electrode tool. The electrolytic solution is allowed to enter into and flow within the through-hole patterns of the masking member in order to electrolytically machine surfaces of the workpiece only in the through-hole patterns.
Abstract:
A valve device having a novel vale seat plate is provided. The valve seat plate has an inlet opening, an outlet opening, a front side and a back side. A sealing case covers the front side and inlet and outlet pipes are attached to the back side to communicate respectively with the inlet and outlet openings. A valve element moves to cover the outlet opening on the front side to close the outlet opening. The novel valve seat plate includes at least two plates that are joined to each other. One plate forms the area around the outlet opening and the other plate forms other areas of the valve seat plate.
Abstract:
An optical pickup device is equipped with a first light source that emits first light, a second light source that emits second light having a wavelength different from a wavelength of the first light, and a diffraction element that deflects the first light or the second light to match optical axes of the lights. The diffraction element is a step-like diffraction element in which one of an incident face and an emitting face thereof has a step-like grating face. A step difference of the step-like grating face is set to have a measurement that generates a phase difference of one wavelength of one of the first light and the second light, and the number of steps of the step-like grating face is set to maximize a (+) first order diffraction efficiency or a (−) first order diffraction efficiency for the other light.
Abstract:
A lens driving device includes a moving body equipped with a lens and a driving magnet attached to the lens, and a fixed body that is equipped with a driving coil that forms together with the driving magnet a magnetic circuit and moves the moving body in an optical axis direction of the lens between a first lens retaining position and a second lens retaining position, and at least one magnetic member disposed adjacent to at least one of two end sections in the optical axis direction of the driving magnet. The moving body is retained at the first lens retaining position by magnetic attraction caused by the driving magnet and the magnetic member when energization of the driving coil is stopped. Accordingly, the driving coil does not need to be energized while the lens is retained at the first lens retaining position.