摘要:
A rotational driving apparatus with a motor, a worm pressingly fitted to an output shaft of the motor, and a worm wheel meshing with the worm, is provided to output rotation of the motor from the worm wheel via the worm. The apparatus includes support, pressing, plug, and urging members. The support member is placed forming a gap with respect to a tip end of the worm, and includes a through hole positioned on a same axis as the worm. The pressing member is inserted into the through hole, and protrudes from a tip end of the through hole to butt against a tip end face of the worm. The plug member is fitted into the through hole to close the through hole, in which its fitting degree into the through hole is adjustable. The urging member is interposed between the pressing member and the plug member to urge the pressing member toward the worm.
摘要:
A rotational driving apparatus which comprises a motor, a worm pressingly fitted to an output shaft of the motor, and a worm wheel meshing with the worm, to output rotation of the motor from the worm wheel via the worm, the apparatus comprising: a support member placed with forming a gap with respect to a tip end of the worm, the support member comprising a through hole positioned on a same axis as the worm; a pressing member that is inserted into the through hole, and protrudes from a tip end of the through hole to butt against a tip end face of the worm; a plug member fitted into the through hole to close the through hole, in which its fitting degree into the through hole is adjustable; and an urging member interposed between the pressing member and the plug member to urge the pressing member toward the worm.
摘要:
The lens barrel cover of a camera is made separately from its front cover, whereby the center positions of the lens barrel and opening of the lens barrel cover can easily be aligned with each other. Also, since the insertion opening of the front cover is disposed as being shielded with the lens barrel cover, the insertion opening is not exposed to the exterior of the camera, whereby the appearance of the camera will not be spoiled even if the insertion opening and lens barrel positionally deviate from each other. Further, since the front cover is pressed toward the main body section as the lens barrel cover is being attached, no gap is formed between the front cover and the main body section.
摘要:
A stepping motor comprises first to third coil portions and first to second rotors. The first rotor has a cylindrical shape and a circumferential surface thereof is magnetically-polarized so as to alternately arrange south poles and north poles. The first rotor is disposed inside the first and second coil portions, and is rotated by magnetic fields generated at a time when the first and second coil portions are energized. The second rotor has a disk shape and a surface thereof is magnetically polarized so as to alternately arrange south poles and north poles. The second rotor is disposed such that edge areas of both surfaces thereof are interposed between the second and third coil portions. The second rotor is rotated by magnetic fields generated at a time when the second and third coil portions are energized.
摘要:
An actuator comprises: an electro-mechanical conversion element; a driving frictional member that is mounted onto one side in an extension/contraction direction of the electro-mechanical conversion element; a driven member that is frictionally engaged with the driving frictional member; a fixed frame; an elastic supporting member that is mounted onto the other side in the extension/contraction direction of the electro-mechanical conversion element and displaceably supports the other side of the electro-mechanical conversion element with respect to the fixed frame; and a pressing member that presses the elastic supporting member in the extension/contraction direction to maintain the elastic supporting member in an elastically deformed state.
摘要:
A driving mechanism comprises: (i) an electromechanical conversion element comprising: an elongating and contracting portion that elongates and contracts; and a dummy layer that does not contribute to elongation and contraction of the electromechanical conversion element, in which one end of the dummy layer is attached to one end, in elongating and contracting direction, of the elongating and contracting portion; (ii) a driving friction member directly or indirectly attached to the other end of the elongating and contracting portion of the electromechanical conversion element; and (iii) a driven member frictionally engaged with the driving friction member, wherein a center of gravity of the entire electromechanical conversion element is not made coincident with a geometric center of the elongating and contracting portion in the elongating and contracting direction.
摘要:
An imaging device comprises a first lens unit and a second lens unit. A first fixed barrel of the first lens unit movably holds a first lens frame, which holds a first lens group, in an optical-axis direction. A second fixed barrel of the second lens unit movably holds a second lens frame, which holds a second lens group, in the optical-axis direction. The first and second fixed barrels are secured in series in the optical-axis direction. The first and second lens units are adapted to be easily assembled in series in the optical-axis direction. Misalignment of the plural lens groups is prevented, and the first and second lens groups are accurately and individually moved in the optical-axis direction.
摘要:
A piezoelectric actuator includes a piezoelectric element, having first and second ends, for expansion or contraction to shift in response to a drive signal. A drive shaft is frictionally engaged with an engageable portion of a lens unit, has first and second axial ends, for shifting together with the piezoelectric element by contact between the first end and the first axial end, to move the engageable portion linearly upon expansion and contraction of the piezoelectric element with a difference between its expanding and contracting speeds. A retaining frame includes a first support panel, provided with the second end secured thereto, for supporting the piezoelectric element. A second support panel is provided with the second axial end secured thereto, for supporting the drive shaft. A biasing panel portion of the second support panel biases the drive shaft to press the first axial end on the first end of the piezoelectric element.
摘要:
A lens driving device includes: a stator having a cylindrical shape, for generating a magnetic field within the cylindrical shape; a rotor located within the cylindrical shape of the stator and being rotation-driven for the stator by a magnetic field created by the stator; a lens holder located further inside the rotor, for holding a plurality of lenses with a small lens thereof being located at an arrangement end of the plurality of lenses; a converting mechanism for converting the direction of force by rotation driving of the rotor into direction along the optical axes of the lenses and transmitting the force in the direction thus converted to the lens holder; and a rotation stopper mechanism formed beside the small lens, for preventing the rotation of the lens holder through physical contact.
摘要:
In the data superimposing device, an aperture is provided in the narrowest position of the space formed between the arc-shaped outer wall surface of a take-up spool chamber and the outer wall surface of a photographic light path shielding cylinder, and an image-forming lens is installed immediately behind the aperture. It is thereby made possible to effectively suppress flare and clearly superimpose data on a film because the space, though it is limited in size, is expected before behind the aperture.