摘要:
An electromagnetic diaphragm shutter mechanism is provided with an electromagnet in the form of a coil or a printed circuit pattern arranged on a sector ring of the shutter mechanism. With a magnetic field applied to the electromagnet, when current is caused to flow therethrough in a prescribed direction, the sector ring is driven to rotate. A light measuring diaphragm mechanism related to the exposure diaphragm of the shutter blades serves to control the shutter and to improve the accuracy of program control of the shutter, the sector ring being always urged to move in a direction to close the shutter.
摘要:
An electromagnetic actuating device for controlling the opening and closing operation of a shutter includes a plurality of plate-like permanent magnets and yokes alternating in layers to form a plurality of magnetic paths, and a moving coil arranged to be movable in a space provided in said magnetic paths. The device is thus minimized in bulk and size, can be built into the shutter casing, and rendered operable with electrical energy consumption kept to a minimum.
摘要:
An optical system shifting device for a camera in which an optical system is shifted in the direction of the optical axis by the driving force of a motor, wherein a first positioning member effects the positioning of the optical system in the direction of the optical axis independently of the driving force of the motor, a second positioning member effects the positioning of the optical system in a direction perpendicular to the optical axis of the optical system, and a switching member actuates the motor by giving an external force to the optical system, whereby the functional features as well as maneuverability of the optical system shifting device are improved.
摘要:
A camera having an electromagnetically driven shutter provided with a counter capable upon counting a present number producing a signal. Each time the shutter is closed, the counted value is changed, while the period of actuation of the shutter is controlled to effect a predetermined fraction of an exposure, so that a continuous sequence of shots equal in number to that preset in the counter are taken automatically.
摘要:
In an automatically focusing camera, the lens is driven to infinity during film winding and the film winding spool is blocked when film winding is completed. Upon shutter release actuation of the camera, film winding is unblocked when the automatic focusing circuit energizes a first magnet and lens rotation is blocked at the focused position when the automatic focusing circuit energizes a second magnet. A single control member operates to effect blocking of the film winding mechanism and to drive the lens to infinity when rotated in one direction, and to unblock the film winding mechanism when rotated in the opposite direction.
摘要:
In a vari-focal camera which has a photo-taking optical system including a main lens system and an auxiliary lens system and is arranged to be shiftable between at least two different focal lengths by moving the photo-taking optical system back and forth on a photo-taking optical axis in such a way as to cause the auxiliary lens system to move onto and out of the optical axis, a guide bar is arranged to allow a lens barrel unit which includes the photo-taking optical system, a shutter and a photo-taking lens focusing device to straightly move. The guide bar is fittingly engaged with a member secured to a camera body. The camera is further provided with an adjusting member for focusing the photo-taking optical system in each of preset positions in which the photo-taking lens has the different focal lengths.
摘要:
A motorized camera having a gear train between an electric reversible motor and a film rewind fork with a mechanism for transferring the driving torque from an intermediate gear of the train to move a member having function other than film transportation as the gear is out of mesh with the next one, wherein a mechanism is provided between the last gear of the train and the rewind fork so that only when the last gear has rotated by a prescribed angular distance, the fork starts to engage the supply spool of the film cartridge to rewind the film.
摘要:
An electromagnetic drive device is described for use in a camera to electromagnetically drive the diaphragm or shutter blades. A conductive coil pattern is positioned on the opposite sides of a rotor for the shutter drive. The shutter blades, which are driven by the rotor, are made of a synthetic resin. In order to connect the rotor to the shutter blades, electrically conductive drive pins are used to electrically couple the coil pattern on one side of the above-described rotor to the pattern on the opposite rotor side. The axle of the drive pin, moreover, is fixed in a penetration hole in the rotor.
摘要:
The present invention relates to an electromagnetically driven shutter device for camera, so designed that a detecting means for detecting the displacement speed of the shutter member and the power supply means for supplying the driving energy to the shutter member are provided in such a manner that the output of the power supply means is varied in accordance with the output of the detecting means so as to maintain the displacement speed of the shutter member constant.
摘要:
In the automatic film transportation type camera using an electric motor in which upon a forward rotation thereof the film is wound and upon a reversed rotation thereof the film is rewound, a mechanism for moving a photographic lens barrel between a standard or wide angle setting and a telephoto setting is provided with a clutch capable of transferring the motion of the motor from a rewind fork to the moving mechanism, and a switch arranged to be closed when the clutch is cut off, thereby the motor is energized to rotate in the reverse direction, driving the barrel to move axially from one of the settings to the other, while leaving the rewind fork stationary.