摘要:
A mechanism, for feeding a film with a photographing information magnetic recording area, of a camera. The camera including the mechanism has a cartridge holder inside which a film cartridge housing the film in is set; an aperture for defining an exposure field on the film; a magnetic head for writing/reading the photographing information; a take-up spool around which the film fed from the film cartridge is wound; and a drive motor for feeding the film between the film cartridge and the take-up spool. Both the take-up spool and the magnetic head are installed on one side of the aperture, and both the cartridge holder and the drive motor are installed on the other side, opposite to the one side in view of the film feeding direction, of the aperture. The drive motor is mounted opposite to the aperture relative to the cartridge holder; therefore, a greater distance is secured between the magnetic head and the motor so that an electromagnetic noise generated from the motor during the writing/reading operation by the magnetic head is effectively reduced on a side of the magnetic head.
摘要:
An actuator applied with shape memory alloy which can be operated in a wide operating temperature range and has a long life time. At a normal ambient temperature, when the first wire of the acting member made of shape memory alloy in which predetermined shape is memorized in advance, is heated, it is transformed to the memorized shape to enable the acting member to be moved. A relative low stress is generated at the first wire and its life-time is not shortened. In the case that the ambient temperature is increased to exceed a transformation starting temperature of the shape memory alloy, the second wire of shape memory alloy is transformed to the memorized shape to generate a high stress at the first wire and to increase the transformation starting temperature of the first wire. With such an arrangement as above, it is possible to operate the actuator applied with the shape memory alloy in a wide operating temperature range.
摘要:
To provide an image shake correcting optical apparatus using a small, lightweight engaging mechanism for the correction lens holder engaging mechanism. A ring-shaped engaging member 16 formed of shape memory alloy and having three engaging arms on its inside is located outside a lens holder 11 for a correction lens L3, and the engaging contacts 16b at the tips of the engaging arms 16a are pushed toward the center of the ring-shaped engaging member by means of coil springs 17. The engaging member 16 formed of shape memory alloy has a prescribed memorized shape so that the arms 16a will assume a retracted position, and where no heat is applied, the engaging contacts 16b of the engaging arms press onto the lens holder 11 for the correction lens L3 from the outside due to the spring force of the coil springs 17, and engages with and maintains in place the lens holder 11. Where heat is applied, the engaging arms 16a retract, whereupon the engagement of the lens holder 11 is terminated.
摘要:
A mechanism which opens and closes a cover member of a IX240 cartridge film, the mechanism comprising a driver which possesses a first gear and interfaces with the aforementioned cover member, a crank cam which possesses a pin disposed off-center with respect to a rotational shaft and which rotates about said rotational shaft, and a crank lever possessing a slot into which the aforementioned pin may slide freely and a second gear which meshes with the aforementioned first gear, and wherein rotation of the aforementioned crank cam is propagated, via bi-directional pivoting of the aforementioned crank lever, as bi-directional pivoting of the aforementioned cartridge door driver.
摘要:
A lens drive device that is located inside a camera main body and can drive lenses that are interchangeably mounted to the camera main body, said lens drive device having a coupler that transmits the drive force to the lenses, a drive motor that rotates and drives the coupler, a clutch mechanism that connects and disconnects the coupler and the drive motor, and an encoder that detects the amount of rotation of the coupler while the coupler and the drive motor are disconnected by means of the clutch mechanism.
摘要:
An image shake correction device for correcting image shake on the focal plane of an optical apparatus due to vibration of the optical apparatus such as a camera. A correction optical element is provided in the optical path of the principal optical system, the correction optical element is driven correspondingly to the detected image shake magnitude, and the image shake on the focal plane of an optical apparatus is corrected. A driving mechanism which utilizes shape memory alloy is used for driving a correction lens for correcting image shake.
摘要:
A multiple exposure camera performing a plurality of exposures in one photographing operation has a diaphragm, a shutter and a controller. The diaphragm controls an amount of light passing through a taking optical system to reach a light receiving medium. The shutter controls an exposure time of the light receiving medium. The controller controls a degree of blur of a subject image formed on the light receiving medium by controlling an exposure operation at a predetermined aperture value and a predetermined shutter speed in each of the plurality of times of exposures.
摘要:
A camera has at least one motor, a spindle gear (i.e. a gear having a spindle) for rewinding and thrusting a film, a cam that rotates together with the spindle gear when the spindle gear is rotated in a film-rewinding direction and that remains at rest when the spindle gear is rotated in a film-thrusting direction, a direction-limiting mechanism for permitting the spindle gear to rotate in the film-rewinding direction only when the motor is rotating in a forward direction, and a transmission mechanism that comes into contact with the cam when the motor is rotating in a reverse direction and that, when the cam is in one of predetermined rotation positions, engages with and thereby transmits a driving force of the motor to a corresponding one of driven members provided one for each of the predetermined rotation positions. In this camera, paths for transmitting the driving force of the motor are switched by first rotating the spindle gear in the film-rewinding direction to bring the cam into one of the predetermined rotation positions and then reversing a rotation direction of the motor.
摘要:
A camera in use of a film cartridge which contains a film wound around a winding shaft in a light-shielding condition, wherein an output of a motor that is disposed in a movable cartridge chamber drives the cartridge chamber to open and close, driven members that are arranged in a camera body, and driven members that are arranged in the cartridge chamber. Therefore, there is no need to arrange a complicated transmitting mechanism which transmits a driving force from a motor in the camera body, which makes it possible to simplify a driving force transmitting mechanism.
摘要:
An ultrasonic drive apparatus for preventing a slip between an object to be driven and a driving part of the apparatus to drive the object. The driving part includes an elastic member through which vibrations from electrical-mechanical converters are transmitted to the object. The elastic member can deform in a direction in which the object is driven. The driving part makes a predetermined locus to drive the object while the elastic member deforms in the direction so as to absorb the slip between the object and the driving part. The elastic member and the converters are mounted symmetrically relative to an axis which is generally perpendicular to the direction in which the object is driven, so that the object can be driven forward and backward.