摘要:
An iris drive mechanism has two slidable diaphragms which are operatively connected with a motor through a lever arrangement which, for a given motor output shaft rotational speed moves the diaphragms slowly at their extreme positions wherein the aperture is small and large respectively, and more quickly at an intermediate stage. The slower movement when the aperture is small improves the F number resolution.
摘要:
A lens barrel is composed of a shaft located in a lens barrel parallel to the optical axis thereof, a movable lens frame installed in the lens barrel having a bearing to receive the shaft and holding a lens therein to be moved therewith along the direction of the optical axis via the bearing and the shaft, and a cantilever made from a elastic material of which one end is fixed to the bearing and another end is pressed to the shaft, the cantilever being extended along the direction of the optical axis. The cantilever may be a flat spring formed of synthetic resin.
摘要:
In a rotary head drum device for use in a video tape recorder or the like, a motor is provided between a rotating drum and a fixed drum. A drum base has at least three supporting surfaces for supporting the head drum. The supporting surfaces are formed at positions substantially equally spaced from a center of a rotating shaft fixed to the rotating drum and substantially equally spaced from each other. A single screw for fixing the fixed drum to the drum base is threaded into the fixed drum in the vicinity of the rotating shaft. With this construction, quality can be improved, and cost can be reduced.
摘要:
A cam arrangement for a cassette loading mechanism includes a sliding chassis, slidingly mounted on a fixed chassis. When the chassis slides in one direction a cam pin is moved along a cam surface of a fixed cam provided on the fixed chassis to a second cam surface provided on a movable cam mounted to the movable chassis. Proximate a return side of an end of the first cam surface a return cam is provided such that, should misalignment occur between the first and second cam surfaces during tape loading or unloading operation, the cam may be returned to an initial position automatically.
摘要:
A combination video tape recorder and camera includes a main body having a video tape recorder and a television camera, and a separable hand grip secureable to a side wall of the main body. The hand grip carries a view finder for the camera and a battery for supplying operational power to the video tape recorder and the television camera.
摘要:
In a hybrid lens forming method for transferring an aspherical composite layer made of an ultraviolet-curing resin, which is curable by irradiation with ultraviolet rays, onto one surface of a convex lens by using a forming die, the forming die is made of a material which transmits ultraviolet rays, and the aspherical composite layer is transferred onto the convex lens by applying ultraviolet rays from the side of the forming die and curing the ultraviolet-curing resin with ultraviolet rays transmitted through the forming die.
摘要:
An electromagnetic actuator for moving a focusing lens along an optical axis includes a lens barrel having two supporting rails, a set of cylindrical inner and outer yokes incorporating a pair of magnets, a lens holder which holds the lens and is supported slidably on the supporting rails by means of a bearing device and rail guide provided on two arms of the lens holder, a coil wound on a bobbin which is fixed on the lens holder and located so that the coil is exposed to the magnetic field of the magnets inside the yokes. The yokes have cut portions, allowing the arms of lens holder to cut into the yokes when the lens is moved.
摘要:
In a cassette type recording and/or reproducing apparatus, such as an 8-mm VTR with a built-in camera, in which a tape cassette is so installed on a chassis as to have a pair of tape reels therein engaged with a pair of reel disks and then, a tape is drawn from the tape cassette by a tape loading means so as to be wound around a rotary head drum, the tape cassette is moved together with the reel disks toward the rotary head drum, after placed on the chassis on which the reel disks are provided, so that it becomes easy to make the cassette type recording and/or reproducing apparatus compact, while maintaining high tape-running stability and high recording and reproducing precisions.
摘要:
Very small grains (103) are attached to a cleaning roller (100) made of a porous and flexible material such as a polyurethane foam or the like. In a magnetic head cleaning apparatus in which the cleaning roller that is brought in rotatable contact with a rotary head drum on which a magnetic head for recording and/or reproducing a magnetic tape is mounted to thereby clean the magnetic head, even adhesive alien substances that cannot be removed in the prior art can be removed with ease.
摘要:
A tape cassette loading system for wrapping a magnetic tape about a magnetic rotary head drum of a recording and/or reproducing apparatus is provided. The loading system includes two tape guiding elements for withdrawing the tape from a tape cassette towards the rotary head drum and their tape guiding track members provided around the drum in order to define tape loading paths. One of the tape loading path slopes downwardly from a loading stand-by state position. The other tape loading path slopes upwardly from the loading stand-by state position. The movement of the two guiding elements traveling in their loading paths allows the tape to be wrapped helically about the drum. The height drum may therefore be reduced and the recording and/or reproducing apparatus can be made smaller.