摘要:
A method of grain refining cast magnesium alloy includes adding to a magnesium alloy melt containing aluminum and manganese, pure carbon powder, or a carbon source in combination with niobium pentoxide or vanadium pentoxide.
摘要:
A zoom lens includes: a front group including a plurality of movable lens groups; and a rear group that is provided on an image side of the front group and that includes a negative lens and a positive lens. The positive lens has a flat lens surface on its image side, and is tiltable about a spherical center of its object side lens surface that is convex on the object side. When a lens system is inclined, the positive lens is tilted in relation to the optical axis of the lens system based on: a focal length of the overall lens system; an angle of the optical axis of the lens system after being inclined in relation to the optical axis before being inclined; a distance between the image side lens surface of the positive lens and the image plane; and a refractive index of the positive lens.
摘要:
A zoom lens including a varifocal lens unit having a plurality of movable lens groups, and a prism disposed on an image side of the varifocal lens unit. The prism has an incident plane on which a light flux from the varifocal lens unit enters, and an exit plane from which the light flux is emitted toward an image plane, and is configured such that the incident plane or the exit plane or both planes can be inclined with respect to an optical axis, whereby a field of view is shifted by a predetermined amount by inclining the plane.
摘要:
A zoom lens includes a varifocal lens unit including a plurality of movable lens groups, and a prism disposed on an image side of the varifocal lens unit. The prism has an incident plane into which a light flux from the varifocal lens unit enters, and an exit plane from which the light flux is emitted toward an image plane, the exit plane capable of being inclined with respect to an optical axis, the exit plane inclined in accordance with a following conditional expression “α=−f×θ/[Bf(n−1)]”, where α: an angle formed by a normal of the exit plane and the optical axis, f: a focus distance of a whole lens system, θ: a turning angle of a lens system, Bf: a distance from the exit plane of the prism to the image plane along the optical axis, and n: a refraction index of the prism.
摘要:
A lens includes a front group including a plurality of lens groups; and a rear group that is provided on an image side of the front group and that includes a negative lens and a positive lens. The positive lens has a flat lens surface on its image side, and is tiltable about a spherical center of its object side lens surface that is convex on the object side. When a lens system is inclined, the positive lens is tilted in relation to the optical axis of the lens system based on: a focal length of the overall lens system; an angle of the optical axis of the lens system after being inclined in relation to the optical axis before being inclined; a distance between the image side lens surface of the positive lens and the image plane; and a refractive index of the positive lens.
摘要:
An apparatus for exchanging die assemblies for extruding a material from an extruder. The apparatus employs a carriage on an extruding side of the extruder, carriage moving device for moving the carriage along a longitudinal axis along rails perpendicular to an extruding direction of the material, two grasping units supported on the carriage on the right and left sides, grasping unit moving devices for moving the grasping units along a traverse axis in parallel with the extruding direction, respectively, grasping unit vertical moving devices for moving the grasping units along a vertical axis perpendicular to the longitudinal and traverse directions, respectively, and a plurality of storng stands spaced apart from each other in the longitudinal directions for storing various kinds of die assemblies. Each of the grasping units extending in the vertical axis and having a pair of arms provided with grasping devices for grasping one of the die assemblies.
摘要:
An information terminal includes: a front side casing member including in turn a section for clamping on each of two opposite top and bottom sides or on each of two opposite left and right sides of the information terminal when seen from a front side of the terminal, the sections for clamping extending along directions of the opposite sides; a back side casing member including another section for clamping corresponding to the section for clamping of a front side casing member, the back side casing member accommodating an inner structure of the information terminal in conjunction with the front side casing member; a pair of frame members, each frame member holding the section for clamping of the front side casing member and the other section for clamping of the back side casing member together in a clamped state; a first lock mechanism that, after thrusting the frame members onto the section for clamping and the other section for clamping, performs locking when the frame members are slid in a direction along the opposite sides; and a second lock mechanism that suppresses movement of the frame members following the locking.
摘要:
The present invention is relates to a mobile electronic apparatus including a packaging structure configured to evade destruction of a display part against an impact applied from outside. In a mobile electronic apparatus (1), if an impact is applied from a direction (B), a casing composed by a casing section (51), a bottom cover (20) and a cover (60) become deformed. If the casing is deformed, a hollow section (100) is deformed at the same time. A key rubber (30) becomes deformed to follow the portions becoming deformed. By the key rubber (30) becoming deformed, the impact applied from outside may be absorbed, and impact exerted to LCD module is reduced.
摘要:
Crushing finely the chipped rubber such as that of waste tire is done by further small number of crushers, and the capture rate of the target size of the rubber particles is improved.With a crusher which finely crushes the chipped rubber (G) such as that of waste tire, the chipped rubber (G) is supplied to a crusher (10a) structured by a rotating roll (12) having relatively rough groove pitch and pluralities of fixed blades (14) each of which has pluralities of grooves forming crushing edges, thus conducting crushing. The rubber particles (G) discharged from the crusher (10a) are again supplied to the crusher (10a) to repeat the crushing to conduct rough-finishing operation. Then, thus roughly-finished rubber particles (G) are treated by similar crushing operation using a rotating roll (10b) having relatively small groove pitch to conduct finish treatment. The finely-crushed rubber particles are classified using a sieve (16) to specified size ranges.
摘要:
An adaptor having the same size as that of a standardized tape cassette accommodates a small-sized tape cassette for insertion into a recording and/or reproducing apparatus and includes an upper adaptor half formed to become openable and/or closable, a pair of tape withdrawing levers for withdrawing a magnetic tape from the small-sized tape cassette, and a pair of coupling members for coupling the upper adaptor half to the tape withdrawing levers, wherein when the upper adaptor half is rotated in its closing direction, the tape withdrawing levers are rotated to withdraw the magnetic tape so that the magnetic tape is extended within the adaptor.