Abstract: A shutter apparatus includes a front blade unit and a rear blade unit configured to open and close an opening for exposure control, a front drive member and a rear drive member configured to drive the front blade unit and the rear blade unit between an open position and a closed position of the opening, respectively, a front cam gear and a rear cam gear configured to charge the front drive member and the rear drive member, respectively, a front driving source and a rear driving source connected to and configured to rotate the front cam gear and the rear cam gear, respectively, and a controller configured to control the front driving source and the rear driving source based on an imaging condition so as to change driving times of the front blade unit and the rear blade unit.

Abstract: An optical element driving mechanism is provided. The optical element driving mechanism includes a fixed portion, a movable portion, a first driving assembly, and a positioning element. The movable portion is movably disposed on the fixed portion and comprises an optical element, wherein the optical element moves in the first direction. The first driving assembly is at least partially disposed on the fixed portion. The positioning element is rotatably disposed on the fixed portion or the movable portion, wherein when the first driving assembly is not activated, the positioning element is used to limit the position of the movable portion relative to the fixed portion to a limit position.

Abstract: A shutter unit includes a base plate, a first blade operation member movable integrally with the first blade member between a first movement completion position and a first movement start position, a second blade operation member movable integrally with the second blade member between a second movement completion position and a second movement start position, a first charge member configured to charge the first blade operation member from the first movement completion position to the first movement start position, and a second charge member configured to charge the second blade operation member from the second movement completion position to the second movement start position, wherein the first charge member and the second charge member include coaxially arranged cam gears and are configured to rotate in opposite directions.

Abstract: A blade-driving device includes: a board including an opening; a blade opening and closing the opening; an arm driving the blade and made of a synthetic resin; a drive member driving the arm; and a reinforcement member formed with a laser welding mark indicating a mark formed by laser welding the reinforcement member and the arm together, and made of a synthetic resin.

Abstract: A shutter apparatus includes a blade member, a blade moving member, a locking member, a cam member, and a restriction member. The cam member moves the locking member from the locking position to the non-locking position so that the blade moving member moves from the closing position to the opening position. The restriction member moves from the non-restriction position to the restriction position after the blade moving member moves from the closing position to the opening position. The cam member moves the locking member in a direction opposite to a direction from the non-locking position to the locking position so that the locking member moves the restriction member from the restriction position to the non-restriction position.

Abstract: A camera shutter mechanism for covering and exposing an imaging sensor array is disclosed. The camera shutter mechanism includes a rotary motor, a crank mechanism, a cover, a guide, and a drive circuit. The rotary motor is coupled to the crank mechanism to rotate the crank mechanism about a central axis. The cover is coupled to the crank mechanism at a point away from the central axis. The drive circuit controls the rotary motor so that the cover moves back and forth repeatedly in a substantially linear motion along the guide between a shutter closed position and a shutter open position over the imaging sensor array. Other embodiments are also described and claimed.

Abstract: A focal-plane shutter includes: a board including an opening; a leading blade and a trailing blade; a trailing blade lever; a first lever; a second lever; a self-holding type solenoid; a leading blade electromagnet and a trailing blade electromagnet; and a set lever.

Abstract: A focal plane shutter includes: a board including an opening; a drive lever swingably supported by the board, biased from a start end to a terminal end of a swingable range by a drive spring, and driving blades opening and closing the opening; and a set member rotating in a first direction to position the drive lever at the start end, and then rotating in a second direction.

Abstract: A focal plane shutter includes: first, second, and third boards respectively including openings through which light enters an image pickup element from an object side, and arranged in this order from the object side toward the image pickup element side; a blade arranged between the first and second boards and capable of opening and closing the openings; and a holding member arranged between the second and third boards, not coupled to the blade, and holding the second board from the image pickup element side.

Abstract: A focal-plane shutter includes: a board including an opening; a leading blade and a trailing blade; a trailing blade lever; a first lever; a second lever; a self-holding type solenoid; a leading blade electromagnet and a trailing blade electromagnet; and a set lever.

Abstract: An imaging apparatus includes a focal plane shutter that has a simple mechanical structure, is easily manufactured and controlled, and provides a live view function. The focal plane shutter includes: a front curtain assembly including two or more front curtain links and two or more front curtain blades, wherein bosses are formed at one of the front curtain links and the front curtain blades, holes are formed in the remaining one of the front contain links and the front curtain blades, and the bosses are inserted into the holes; and a rear curtain assembly including two or more rear curtain links and two or more rear curtain blades, wherein bosses are formed at one of the rear curtain links and the rear curtain blades, holes are formed in the remaining one of the rear curtain links and the rear curtain blades, and the bosses are inserted into the holes.

Abstract: A focal plane shutter includes: a board including an opening; a drive lever swingably supported by the board, biased from a start end to a terminal end of a swingable range by a drive spring, and driving blades opening and closing the opening; and a set member rotating in a first direction to position the drive lever at the start end, and then rotating in a second direction.

Abstract: An enclosure for an imaging device. In one embodiment, the enclosure includes a housing with a transparent window. A shutter mechanism is disposed on the housing and transparent window, and includes an opening formed therein. A shutter covers and uncovers the opening. Further, a gas supplying unit supplies gas to a space between the housing and the shutter mechanism. In another embodiment, the enclosure includes an inner housing with a transparent window, and an outer housing overlapping the inner housing and with an opening formed therein. A driving unit moves the opening along a predetermined path over the transparent window. A gas supplying unit supplies gas to the outer. In yet another embodiment, the enclosure includes inner and outer housings each having an opening formed therein. A rotating unit rotates one of the inner and outer housings, and a gas supplying unit supplies gas to the inner housing.

Abstract: An image sensing apparatus comprises a shutter driving member which drives a shutter blade; a shutter spring which urges the shutter driving member; a shutter charge unit which charges the shutter spring, and is switched between an over-charged state and a travel prepared state; a driving unit which drives the shutter charge unit; a retaining unit which, when the shutter charge unit is set in the travel prepared state, retains the shutter driving member in a state in which the shutter spring is charged; a determination unit which determines whether or not the apparatus is executing a continuous shooting operation; and a controller which, when it is determined that the apparatus is executing the continuous shooting operation, controls to drive the shutter charge unit to the travel prepared state without stopping the shutter charge unit in the over-charged state after the charge operation of the shutter spring is complete.

Abstract: A camera shutter mechanism for covering and exposing an imaging sensor array is disclosed. The camera shutter mechanism includes a rotary motor, a crank mechanism, a cover, a guide, and a drive circuit. The rotary motor is coupled to the crank mechanism to rotate the crank mechanism about a central axis. The cover is coupled to the crank mechanism at a point away from the central axis. The drive circuit controls the rotary motor so that the cover moves back and forth repeatedly in a substantially linear motion along the guide between a shutter closed position and a shutter open position over the imaging sensor array. Other embodiments are also described and claimed.

Abstract: A shutter mechanism for an optical system includes a linear track having a first end and a second end, a first magnetic assembly located adjacent the first end of the track and a second magnetic assembly located adjacent the second end of the track, the two magnetic assemblies arranged in opposite polarities. A shutter plate is provided coupled to a coil mounted on and movable across the track. When a direct electric current is passed through the coil in one direction the shutter is forced to move to the first end of the track, whereas when a direct electric current is passed through the coil in an opposite direction the shutter is forced to move to the second end of the track.

Abstract: A shutter apparatus mounted in an image sensing apparatus, the shutter apparatus comprising: a blade member configured to open/close an opening through which light from an object passes, and control an aperture area of the opening; and a driving unit capable of first and second driving controls, the first driving control driving the blade member to serve as a stop, and the second driving control driving the blade member to serve as a shutter, wherein when the object is captured by an image sensor, the driving unit temporarily drives the blade member in an opening direction from a first position, to which the blade member is driven in a closing direction to serve as a stop, and then activates the blade member to a fully closing position.

Abstract: In a camera, the first cam is rotated to assume a rotational phase at which drive of the first shutter blade set with the first drive force is not hindered and the second drive force charge cam face in contact with the second charge member charges the second drive force as the rotating shaft is caused to rotate to a first rotational phase. The second drive force charge cam in contact with the second charge member sustains a second drive force charging state during a transition period in which the rotating shaft in the first rotational phase rotates to a second rotational phase. The first drive force charge cam face in contact with the first charge member charges the first drive force and the second drive force charge cam face in contact with the second charge member charges the second drive force as the rotating shaft is caused to rotate from the first rotational phase to the second rotational phase.

Abstract: A focal-plane shutter 105 includes a leading blade driving member 4 rotatably fitted onto a first shaft 1d and driven by a biasing force of a leading blade driving spring 8, a trailing blade driving member 5 rotatably fitted onto a second shaft 1e and driven by a biasing force of a trailing blade driving spring 9, a leading blade adjusting member 6 rotatably fitted onto the first shaft 1d and adjusting the biasing force of the leading blade driving spring 8, a trailing blade adjusting member 7 rotatably fitted onto the second shaft 1e and adjusting the biasing force of the trailing blade driving spring 9, and an upper base plate 3 including a first surface 3a and a second surface 3b that are thrust position limiters. An area of the first surface 3a is larger than that of the second surface 3b.

Abstract: A first driving member for front blade that connects a front blade and a second driving member for front blade are rotatably mounted to a shaft 1g, a rear blade driving member that connects a rear blade is rotatably mounted to a shaft, the first driving member follows the second driving member and is rotated by a biasing force of a set spring in a setting operation, and is pressed by the second driving member and rotated in photography. The restraining means has a restraining member that can go in and out of an operation path of the restrained portion of the first driving member. When the present invention is adopted in a single-lens reflex camera, the restraining member can be within the operation path of the restrained portion in the setting operation for photography using an optical finder, and the restraining member can be outside the operation path of the restrained portion in the setting operation for photography using an electronic finder.

Abstract: There is provided an image pickup apparatus having a simple structure that enables reduction of shutter release time lag and shutter control with highly accurate shutter time.

Abstract: A focal plane shutter includes: a shutter substrate having an opening; a blade for opening and closing the opening; a drive member swingably supported for driving the blade; a drive spring for driving the drive member; and an adjustment mechanism for adjusting an urging force of the drive spring. One end of the drive spring is engaged with the drive member. The adjustment mechanism includes: an adjustment member engaging the other end of the drive spring and rotatably supported to adjust the urging force of the drive spring; and an engagement member abutting the adjustment member to stop rotation of the adjustment member. The adjustment member has a clearance portion for avoiding abutment against the engagement member at a given rotational position.

Abstract: A light quantity control device includes: a bottom board having an opening; a first blade, a supporting blade and a second blade linearly moving in opposing directions and controlling light quantity passing through the opening; and a driving lever connected to the set of blades and driving the set of blades by rotation of the driving lever. The driving lever rotates within degrees centering on a phantom line A passing through a rotational center of the driving lever and being parallel with the moving directions of the blades.

Abstract: An imaging device and a portable information terminal device of the present invention include: a blade driving unit (20) made up of a base plate (21) having an opening portion (21a) serving as an optical path, an infrared light cut filter blade (23) movably supported by the base plate between a receded position displaced from the opening portion and a position facing the opening portion, and a first electromagnetic driving source (26) that drives the infrared light cut filter blade (23); a lens optical system (32, 33, 34) arranged on the optical path passing through the opening portion; an imaging element (42) that images an object through the lens optical system; and a control unit (51) that drives and controls the blade driving unit (20) and the imaging element (42). The control unit drives and controls the first electromagnetic driving source (26) so as to move the infrared light cut filter blade (23) to the receded position when using an infrared light.

Abstract: A shutter base plate is made of synthetic resin and is configured with one overhang section on the blade-chamber-side surface at one end of an arcuate slot and the other overhang section on the blade-chamber-outside surface. A shock absorbing member made from elastic material is configured with concave portions on the blade-chamber-side surface and three concave portions on the blade-chamber-outside surface. The shock absorbing member is mounted to the shutter base plate in such a way that these concave portions come in contact with the overhang sections, and as is well known, when an exposure operation is completed, the driving pin of a driving member abuts on the shock absorbing member.

Abstract: In a camera, the first cam is rotated to assume a rotational phase at which drive of the first shutter blade set with the first drive force is not hindered and the second drive force charge cam face in contact with the second charge member charges the second drive force as the rotating shaft is caused to rotate to a first rotational phase. The second drive force charge cam in contact with the second charge member sustains a second drive force charging state during a transition period in which the rotating shaft in the first rotational phase rotates to a second rotational phase. The first drive force charge cam face in contact with the first charge member charges the first drive force and the second drive force charge cam face in contact with the second charge member charges the second drive force as the rotating shaft is caused to rotate from the first rotational phase to the second rotational phase.

Abstract: Described is a compact focal plane shutter system adapted for large-format exposure shutters. The focal plane shutter includes at least one multi-segmented screen having multiple rigid blades. Each blade can be moved at a different velocity. By using multiple blades, the rotational inertia about a drive axis can be reduced compared to a conventional single screen shutter system, thus a greater acceleration can be achieved with the same amount of torque about the drive axis. Using smaller blades allows for greater acceleration, resulting in faster shutter speeds to support a wider range of applications. Additionally, the overlap between blades of a multi-segmented screen in an open position is greater than the overlap of the blades in a closed position, providing a compact system. A drive mechanism linearly translates the blades of the multi-segmented screen between the open and closed positions.

Abstract: In a single-lens reflex camera, the rotation center of a lever used for driving a shutter device is arranged rearward of a shutter device with respect to an optical axis, and the lever end (point of action) is arranged in front of the shutter device with respect to the optical axis. Thereby, compactness of the camera body can be realized.

Abstract: A first drive member which rotates with a rotor includes a first cam portion and a second cam portion, and a second drive member which connects a drive pin with a shutter blade includes a first cam portion and a second cam portion. A circular hole of the link member is fitted to a shaft member which is fixed to the first drive member and an elongated hole thereof is fitted to the shaft member fixed to the second drive member. The first drive member rotates the second drive member first via the link member and subsequently rotates the same directly so that when an abutting portion of the second drive member comes into abutment with an edge of the elongated hole, a generated repulsive force acts toward an axis of rotation of the first drive member irrespective of the direction of rotation of a rotor 7.

Abstract: Described is a compact focal plane shutter system adapted for large-format exposure shutters. The focal plane shutter includes at least one multi-segmented screen having multiple rigid blades. Each blade can be moved at a different velocity. By using multiple blades, the rotational inertia about a drive axis can be reduced compared to a conventional single screen shutter system, thus a greater acceleration can be achieved with the same amount of torque about the drive axis. Using smaller blades allows for greater acceleration, resulting in faster shutter speeds to support a wider range of applications. Additionally, the overlap between blades of a multi-segmented screen in an open position is greater than the overlap of the blades in a closed position, providing a compact system. A drive mechanism linearly translates the blades of the multi-segmented screen between the open and closed positions.

Abstract: A light controller includes a substrate that has an optical path opening; at least a pair of blades that is reciprocally supported on the substrate and opens and closes the optical path opening; and a driver unit that drives the opening and closing of the pair of blades. The pair of blades is displaced movably on the substrate between an open position where the optical path opening is opened and a closed position where the optical path opening is closed by overlapping with each other. The driver unit and the pair of blades are connected for driving by a transmission unit, and the transmission unit transmits drive power such that one of the pair of blades can be moved at a higher speed than the other blade within a predetermined travel range between the open position and closed position.

Abstract: A focal plane shutter for digital cameras includes a first driving member for a first blade and a second driving member for the first blade, mounted to the same shank; arms for the first blade on which a set spring is hooked; and a set member for restraining the first driving member for the first blade in the proximity of the position where the exposure operation is completed, at a set position by rotating a restraining member, and actuating the first driving member for the first blade to the starting position of the exposure operation in the restoration to the initial position immediately after the release.

Abstract: A drive member attached to the output shaft of a DC motor placed on a shutter base board includes a drive pin connected to the arm of a shutter blade within a blade chamber for driving the shutter blade to open and close an exposure opening with the reciprocal rotation of the DC motor. A brake member rotatably attached to the shutter base board and having a frictional force applied thereto by a spring washer brakes the rotation of the drive member when a bent portion is pushed by the drive pin to rotate.

Abstract: A normally closed shutter in a camera has at least one blade that is moved to open and close the shutter. A movable blade-driver in the camera has a supporting connection with a fixed support to support the blade-driver for movement, and has a driving connection with the shutter to drive at least the one blade to open and close the shutter when the driver is moved. A fixed blocking ramp in the way of the blade-driver stops the blade-driver once the blade-driver has moved to drive at least the one blade to close the shutter. The fixed ramp is inclined to urge or cam the blade-driver to create a high friction-type force at the supporting connection that impedes movement of the blade-driver to drive at least the one blade to re-open the shutter, whereby the shutter is prevented from being reopened unintentionally.

Abstract: A sector drive assembly for a camera which can open and close an aperture has a sector drive unit having an actuator, a drive force transmitting mechanism, and a sector position detecting unit that are removably mounted as a unit to a support plate, and a sector unit having a base plate formed with an aperture and one or more sectors for opening and closing the aperture. Since the sector drive unit is provided as a removably mountable unit, it is high in versatility and can be mounted to various different types of sector units. In addition, since it is configured to detect the state of the sectors before operation, reliable exposure or opening and closing of the aperture are achieved. In addition, a positional adjustment function is provided by a sector urging spring.

Abstract: A sector drive unit for a camera includes sectors capable of opening and closing an aperture provided on a base plate. A first actuator drives the sectors to open and close the aperture, and a drive force transmitting mechanism transmits a driving force of the first actuator to the sectors. A sector retaining unit retains the sectors at the aperture-opening position or at the aperture-closing position, and a second actuator drives the sector retaining unit to a position to retain the sectors and to a position not to retain the sectors. The sector retaining unit prevents the sectors from moving accidentally due to an impact or the like when the sectors are at either the opened position or the closed position. The use of the second actuator for driving the sector retaining unit reduces power consumption and prevents generation of noise during the time of an exposure.

Abstract: A sector drive assembly for a camera with reduced power consumption has a base plate having an aperture, one or more sectors capable of opening and closing the aperture, an electromagnetic actuator for driving the sectors, a drive force transmitting mechanism for transmitting a drive force of the electromagnetic actuator to the sectors, a first detecting unit for detecting when the sectors are open, and a second detecting unit for detecting when the sectors are closed, wherein the supply of power to the electromagnetic actuator is controlled based on signals from the first and the second detecting units.

Abstract: An actuator is constructed so that the rotor is rotated within the range of a preset angle in a direction corresponding to the direction of current supply to the stator coil. The rotor includes a column-shaped permanent magnet having surfaces perpendicular to a center line of rotation and a surface surrounding the center line of rotation and a frame body configured integrally with the permanent magnet. The frame body covers two center portions of rotation of the permanent magnet and the surface surrounding the center line of rotation of the permanent magnet so that a plurality of exposed surfaces are provided. Each of areas in which these center portions of rotation are covered is provided with a journal supported by the bearing of the stator, and a portion extending in the radial direction from one of the center portions of rotation is provided with the output pin to be parallel to the center line of rotation.

Abstract: A driving apparatus having a small charging load, capable of reducing the size of the appratus is disclosed. A present invention discloses a driving apparatus comprises a driving source, a driven member, an energizing member which energizes the driven member in a predetermined direction, a lever member rotatable by receiving the driving force from the driving source at an input portion, which contacts and charges the driven member and a main body which includes a first engaging portion and a second engaging portion and supports the lever member.

Abstract: Disclosed are shutter apparatus provided with a shutter base plate having a shutter aperture, a first arm member which rotates around a center of rotation at a first axis, relative to the shutter base plate, a second arm member which rotates around a center of rotation at a second axis, relative to the shutter base plate, and a plurality of shutter blades, wherein each of the plurality of shutter blades is coupled to the first and second arm members, wherein the first and second arm members rotate around their respective axes whereby the plurality of shutter blades run over the shutter aperture, wherein each shutter blade has a blade main body portion extending in a direction perpendicular to a running direction thereof, and wherein a first shutter blade with a smallest running travel comprises a light shielding portion projecting in the running direction on the coupling portion side to the first and second arm members and arranged to effect light shielding of the shutter aperture, and also disclosed are shut

Abstract: A sector drive unit for a camera includes sectors capable of opening and closing an aperture provided on a base plate. A first actuator drives the sectors to open and close the aperture, and a drive force transmitting mechanism transmits a driving force of the first actuator to the sectors. A sector retaining unit retains the sectors at the aperture-opening position or at the aperture-closing position, and a second actuator drives the sector retaining unit to a position to retain the sectors and to a position not to retain the sectors. The sector retaining unit prevents the sectors from moving accidentally due to an impact or the like when the sectors are at either the opened position or the closed position. The use of the second actuator for driving the sector retaining unit reduces power consumption and prevents generation of noise during the time of an exposure.

Abstract: A sector drive assembly for a camera with reduced power consumption has a base plate having an aperture, one or more sectors capable of opening and closing the aperture, an electromagnetic actuator for driving the sectors, a drive force transmitting mechanism for transmitting a drive force of the electromagnetic actuator to the sectors, a first detecting unit for detecting when the sectors are open, and a second detecting unit for detecting when the sectors are closed, wherein the supply of power to the electromagnetic actuator is controlled based on signals from the first and the second detecting units.

Abstract: A sector drive unit for a camera having one or more sectors provided on a base plate for opening and closing an aperture, an electromagnetic actuator for driving the sectors, and a driving force transmitting mechanism for transmitting a driving force of the electromagnetic actuator to the sectors and converting a prescribed amount of angular movement of the actuator in response to pulse of current or voltage into an amount of movement effective to drive the sectors to an aperture-opening position or an aperture-closing position, so that a cost-effective pulse drive circuit is provided with an increased opening and closing speed and a reduced time lag. In a preferred embodiment, a gear transmission mechanism is employed as the driving force transmitting mechanism and thus smooth operation of the sectors is achieved.

Abstract: A focal plane shutter includes a base plate having an aperture; an electromagnetic actuator including a rotor rotatably supported on the base plate and having a magnetized part and an output part, a yoke disposed around the rotor, and a magnetizing coil wound onto the yoke; a blade pivotably supported on the base plate and connected to the output part, for opening and closing the aperture; and an angle adjusting mechanism. A relative mounting angle between at least two of the magnetized part, the yoke, and the output part is adjusted by the angle adjusting mechanism. Accordingly, variation in, for example, the magnetization angle can be corrected.

Abstract: When the main power of a camera is turned on, a set member (14) is rotated from an initial position to a set position by an operation member (15) on the camera side and once stops at a midway position. At this time, a second blade group (19) retreats from an aperture (1a) and a first blade group (16) enters the aperture 1a to a position not covering an image pickup device (4), so that the aperture (1a) is opened and it is made possible to display a subject in an electronic viewfinder. When a release button is pressed, the set member (14) is rotated from the midway position to the set position and thus the aperture (1a) is covered with the first blade group (16). After this, when drive members (10, 12) are attracted to iron cores (8, 9) and the set member (14) is restored to the initial position, the drive members perform light exposure operation in order.

Abstract: A camera focal plane shutter according to the invention comprises a shutter blade for opening and closing an exposure aperture to carry out an exposure operation; an electromagnetic actuator for directly driving the shutter blade, and a positioning means for positioning the shutter blade at an operation starting position. This positioning means is comprised of a swing arm supported in a manner enabling it to swing so as to comes into contact with and separate from a drive pin of a rotor, a torsion spring for applying a pushing force so as to push one end of the swing arm against the drive pin, and an eccentric pin which stops the swing arm at a position with a predetermined angle against the pushing force of the torsion spring. Therefore, an impulse force caused by the movement of the shutter blade is eased, and the shutter blade is easily positioned with high accuracy at the operation starting position.

Abstract: A focal plane shutter includes a base plate having an aperture; an electromagnetic actuator including a rotor rotatably supported on the base plate and having a magnetized part and an output part, a yoke disposed around the rotor, and a magnetizing coil wound onto the yoke; a blade pivotably supported on the base plate and connected to the output part, for opening and closing the aperture; and an angle adjusting mechanism. A relative mounting angle between at least two of the magnetized part, the yoke, and the output part is adjusted by the angle adjusting mechanism. Accordingly, variation in, for example, the magnetization angle can be corrected.

Abstract: A shutter device includes a shutter base plate having a shutter aperture, a plurality of shutter blades, and an arm member arranged to swing on a predetermined shaft provided on the shutter base plate. The arm member is connected to each of the plurality of shutter blades to cause the shutter blades to travel over the shutter aperture when the arm member swings on the shaft. With a distance to the shaft from a connection part located farthest from the shaft among connection parts where the shutter blades are connected to the arm member assumed to be D, the dimension (length) of the shutter aperture in the direction of travel of the shutter blades assumed to be A, and the maximum angle of swing of the arm member assumed to be &thgr;, at least one of the following conditions is satisfied: 0.78 A≦D≦0.90 A, and 80°≦&thgr;≦94°.

Abstract: A planar space required for installing a camera drive device is reduced. Provided are a rotor magnetized in a radial direction, a pair of stator magnetic pole plates radially opposed to the rotor, yokes formed by extension portions extending radially of the rotor and rise-bent portion vertically raised and bent from extension portions and reaching the stator magnetic pole plates, and a coil provided on the yokes. Each member is arranged in a spatial fashion instead of a planar fashion.

Abstract: A focal-plane shutter for digital still cameras includes a first blade covering an exposure aperture only immediately before an exposure operation is performed; a driving member for the first blade having an iron piece member, actuated in an exposure operation; an electromagnet for the first blade for attracting and retaining the iron piece member of the driving member for the first blade and actuating the driving member for the first blade; a cocking member for the first blade, actuating the driving member for the first blade when actuated from the initial position to the cocked position and actuated from the cocked position to the initial position only immediately after the current is supplied to the electromagnet for the first blade; a second blade covering the exposure aperture when the power is turned off and immediately after the exposure operation is completed; a driving member for the second blade having an iron piece member, actuated in the exposure operation; an electromagnet for the second blade fo