Abstract: To secure a favorable photographing state without causing an increase of power consumption. A blade opening/closing apparatus includes a magnetic driving portion including a coil to which a driving current is supplied and a magnet that is rotated along with energization to the coil; a driving body that includes a to-be-locked portion and is operated by the magnetic driving portion; an opening/closing blade that opens/closes an aperture by an operation of the driving body; and a lock portion that sets a locked state of the opening/closing blade by engaging with the to-be-locked portion, the setting of the locked state and a release of the locked state being carried out in accordance with a rotation position of the magnet.

Abstract: A blade driving device comprising: a driving member; one or more blade members that are caused to undergo sliding motion by the driving member; a blade supporting unit for supporting the blade member slidably; and a frame for containing the driving member and a portion of the blade supporting unit, wherein the blade supporting unit comprises a blade chamber for containing a blade member between opposing thin plate members, along with an insertion portion that has an opening and that protrudes from a frame, wherein the opposing thin plate members are integrated together at least the tip end of the insertion portion.

Abstract: A focal plane shutter has a base plate with an opening; a leading and trailing blade opening and closing the opening; a leading blade driver; a trailing blade driver; a charging portion; a braking member; and a brake driver. The leading blade driver drives the leading blade through a first biasing force of a first biasing member and drives the leading blade through a second biasing force of a second biasing member. The trailing blade driver drives the trailing blade by a third biasing force of a third biasing member. The charging portion applies the second biasing force to the second biasing member and applies the third biasing force to the third biasing member. The braking member brakes the leading blade through friction and the brake driver moves the braking member to brake the leading blade, independently of the leading blade driver, the trailing blade driver, and the charging portion.

Abstract: To provide a blade drive device capable of suppressing variations in movement speed of blades at the time of continuous operation and shortening the operation interval of blades. A blade drive device 10 includes a bed plate 11 having an opening 12, a blade receiving plate 15 arranged so as to face the bed plate 11, a plurality of blades 31b to 34b provided between the bed plate 11 and the blade receiving plate 15, which are expanded in a state where the opening 12 is closed and are housed while overlapping one another in a state where the opening 12 is opened and a regulating member 80 having an abutting surface 82 on which side edge portions 31b1 to 34b1 of the blades 31b to 34b abut when the blades are housed. The abutting surface 82 is an inclined surface 83 inclined to the bed plate 11 side as it goes from the bed plate 11 side to the blade receiving plate 15 side.

Abstract: An integrated actuator coil and decoder module for use in decoder-based irrigation control systems, and related methods of manufacture and installation, are provided herein. In one implementation, an irrigation control device comprises a body, decoder circuitry located within the body, a coil located within the body and coupled to the decoder circuitry, the coil adapted to develop an electromagnetic flux sufficient to cause actuation of a device controlling irrigation equipment in response to signaling from the decoder circuitry. Also included is an electrical connection coupled to the decoder circuitry and adapted to couple to a control wire path of a decoder-based irrigation control system. The decoder circuitry and the coil are integrated into a single device.

Abstract: A focal-plane shutter includes: a board including an opening; a shutter opening and closing the opening; a drive lever provided with a drive pin and swinging; a drive arm provided with an engagement hole engaged with the drive pin, swinging about a center same as a swing center of the drive lever, driving the shutter, and made of a synthetic resin; and a restriction portion defining a swinging range of the drive lever.

Abstract: A focal plane shutter includes: a first board including a first opening; a first shutter including plural first blades, and facing the first board and closing the first opening such that an overlapped state where the plural first blades overlap each other is shifted to an expanded state where the plural first blades expand; and a drive member connected to a root portion of the first shutter and causing the first shutter to move.

Abstract: This image capture device includes: an imager which receives an optical image of a subject and outputs image data; a focal plane shuttering apparatus which restricts incidence of the optical image onto the imager and which is able to select either a normally opened driving method or a normally closed driving method; and a driving method switching section which switches a method for driving the focal plane shuttering apparatus into one of the normally opened and normally closed driving methods. The driving method switching section switches the method for driving the focal plane shuttering apparatus into the normally opened driving method after an image capturing operation has been performed.

Abstract: A focal-plane shutter includes: a board including an opening; a blade opening and closing the opening; a rotor of an actuator for driving the blade; an output member rotated by the rotor and including a first gear portion; a drive member including a second gear portion meshing with the first gear portion, rotating about a predetermined axis, and driving the blade; and a positioning portion abutting with the drive member and defining an end of a rotational range of the drive member, wherein the first and second gear portions and the positioning portion overlap one another in a plane direction perpendicular to the axis.

Abstract: This focal plane shuttering apparatus includes: front and rear curtains; first and second elastic members which generate biasing force to make the front and rear curtains run in such a direction as to get the front and rear curtains retracted from an aperture; a charging member which applies biasing force to those elastic members; a front curtain locking member which keeps the front curtain retracted from the aperture when the charging member applies biasing force to the first elastic member; a rear curtain locking member which keeps the aperture covered with the rear curtain when the charging member applies biasing force to the second elastic member; two switches which turn synchronously with those locking members; and an unlocking member which is interlocked with the charging member that unlocks those locking members.

Abstract: A first blade includes two arms and four blades, and is arranged between a shutter base plate and an intermediate plate. A second blade includes two arms and four blades, and is arranged between the intermediate plate and an auxiliary base plate. During an exposure operation, the four blades of the first blade are brought into an overlap state from a development state and the four blades of the second blade are brought into the development state from the overlap state. Since a contour forming edge of the intermediate plate above the opening portion is formed in the shape of an arc, the four blades of the second blade are able to start an operation appropriately from the overlap state.

Abstract: A focal plane shutter includes: a board including an opening; a shutter opening and closing the opening; a drive source driving the shutter; a drive lever driven by the drive source; a drive arm connected to the drive lever and driving the shutter; a restriction portion defining a stop position of the drive lever; and a buffering member elastically deformable, wherein, when the drive lever drives, abuts the restriction portion, and stops, at least one of the drive arm and the shutter temporarily abuts the buffering member, is spaced from the buffering member, and stops.

Abstract: A focal plane shutter includes a board including an opening; a leading blade and a trailing blade opening and closing the opening; a trailing blade actuator driving the trailing blade; a drive member driving the trailing blade by receiving driving force of the trailing blade actuator; and a buffering member abutting with the drive member in a state where the trailing blade recedes away from the opening, wherein the trailing blade actuator causes the drive member to move away from the buffering member from an abutting state therewith and to abut therewith again in a charging operation, and then starts an exposure operation.

Abstract: A photographing apparatus includes: an image capturing unit; a first blade making a first movement to move to the other side edge of the image capturing unit and a second movement to move to a side edge of the image capturing unit; a second blade moving along with the first blade to the other side edge while being spaced apart from the first blade during the first movement and moving to the side edge of the image capturing unit during the second movement; a third blade moving along with the first blade to the side edge of the image capturing unit to block light from the image capturing unit and then moving to the other side edge to open the image capturing unit; and a controlling unit that resets the plurality of pixels in the rows of the image capturing unit corresponding to the first blade during the first movement.

Abstract: A focal-plane shutter includes at least one blade group, a shutter base plate where the blade group is rotatably attached, a blade driving member rotatably supported by the shutter base plate and configured to drive the blade group from a standby position to a travelling completed position when taking pictures, a charge member configured to charge the blade driving member and a braking member formed on a first surface opposite to a second surface where the blade driving member of the shutter base plate is rotatably supported and configured to abut against a protruding portion which penetrates the shutter base plate from the blade driving member so as to protrude to the first surface.

Abstract: In a focal plane shutter according to the present invention, a support plate is placed while a plate plane of the support plate is parallel to a shutter base plate, a second blade-driving member is fitted to a shaft erectly provided on the shutter base plate, the second blade-driving member being rotated by the biasing force of a second blade-driving spring, an electromagnet for second blade is fitted to the support plate, the electromagnet attracting and holding an iron piece member fitted to the second blade-driving member, a printed wiring board on which a wiring pattern for supplying electric current to the electromagnet is formed is placed in a hole formed in the support plate, and terminal pins of the electromagnet are soldered to the both ends of a coil.

Abstract: A blade room for a second blade group is formed between a shutter base plate and a middle plate and a blade room for a first blade group is formed between the middle plate and an auxiliary base plate, by separating a space between the shutter base plate and the auxiliary base plate by the middle plate. A push pin which is planted on the shutter base plate pushes a portion on the lower area of the middle plate toward the auxiliary base plate so that the middle plate bends in the shape of an arc. Also, the area of the middle plate below the exposure aperture has the narrowest width in the portion which is pushed by the push pin and the pushed portion of the middle plate has a shape by which the area of the middle plate below the exposure aperture is easy to bend.

Abstract: A focal plane shutter includes: a board including an opening; blades capable of opening and closing the opening; a drive lever swingably supported, holding a movable iron piece and driving the blades; a self-holding type solenoid capable of adsorbing to the movable iron piece by a given attraction force in a non-energized state, and reducing the given attraction force in an energized state; a biasing member biasing the drive lever to move the drive lever away from the self-holding type solenoid; and a set member moving the drive lever to abut the drive lever with the self-holding type solenoid, wherein the self-holding type solenoid is energized to reduce the given attraction force when the drive lever is swung by the set member to abut the movable iron piece with the self-holding type solenoid.

Abstract: A shutter drive device includes a base member, an actuator, a first drive member, and a second drive member. The actuator is fixed to the base member and produces a driving force to drive the shutter mechanism. The first drive member is rotatably supported by the base member and configured to be rotated by the driving force. The second drive member is supported by the base member so as to be linearly movable in a first direction and configured to transmit the driving force of the actuator to the shutter mechanism. The first drive member has a gear component to drive the second drive member in the first direction, and a cam component configured to hold the second drive member in a specific position. The second drive member has a rack gear configured to mesh with the gear component, and a cam follower configured to contact the cam component.

Abstract: A second blade-driving mechanism includes second blade-driving first member and second blade-driving second member, only the second blade-driving second member is rotated against elastic force of a blade-driving spring while the second blade-driving first member engages and is locked by a locking member at start of cocking operation of the cocking member to keep a second blade covering an exposure aperture, and the second blade-driving first member is disengaged from locking member at final stage of cocking operation, so the second blade-driving first member can be rotated by elastic force of a second blade-cocking spring and the second blade is made to open the exposure aperture. Staring cocking operation of a focal plane shutter is possible irrespective of the length of time during which imaging information can be transferred from an image sensor to storage via an information-processing circuit.

Abstract: In a first blade unit-driving unit which is rotated by elastic force of a first blade unit-driving spring in shooting, its driving pin rotates a first brake member counterclockwise and a second brake member clockwise against the elastic force of a coil spring fitted to a fitting shaft and against friction resistance force of a friction-providing part including a plate spring or the like at the final stage of the rotation of the first blade unit-driving unit, the plate spring being fitted to the fitting shaft, so that the first blade unit-driving unit is braked, and, at this point, one end part of the first blade unit-driving spring contacts a part to be pushed of the first brake member and controls the counterclockwise rotation of the first brake member, so that braking force to the first blade unit-driving unit acts on the first blade unit-driving unit larger and more surely.

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: When photographing using an optical finer, a hold member rotates, and a pressing member pushes a pushed portion of an iron piece member to rotate an unlocking member for a first blade and an unlocking member for a second blade to bring the iron piece member into contact with an iron core member of an electromagnet. When photographing using an electronic finder, a permanent magnet rotor of an electromagnetic device is rotated in a state where the electromagnet is not magnetized, a deterring member is made to face the operation locus of a deterred portion of the unlocking member for a second blade, and then, the hold member is rotated. Thereby, the unlocking member for a second blade is deterred by the deterring member so as to allow observation using the electronic finder without pushing the locking member for a second blade.

Abstract: A focal plane shutter includes: a board including an opening; blades capable of opening and closing the opening; a drive member movable between a start position and a terminal position, biased toward the terminal position, and driving the blades; a brake member supported to abut and move away from the drive member positioned at the terminal position, and biased to abut the drive member positioned at the terminal position; and a set member rotatable in only one direction, and moving the drive member from the terminal position to the start position; wherein the set member includes a drive portion abutting the brake member to move the brake member away from the drive member and then abutting the drive member to move the drive member toward the start position.

Abstract: A focal plane shutter includes: a board including an opening; a blade movable between a position where the blade recedes from the opening and a position where the blade covers at least part of the opening; a drive arm connected to the blade, the drive arm including an engagement hole; a drive lever including a drive pin engaging the engagement hole; and a restriction portion provided in the drive arm, the restriction portion abutting the drive pin and being thicker than the drive arm.

Abstract: A focal plane shutter device includes a shutter base plate having an opening part, a front curtain, a first elastic member, a rear curtain, a second elastic member, and a drive unit. The front curtain is movable between a first and second position to cover and uncover the opening. The first urging member is configured to move the front curtain between the first and second positions. The rear curtain is movable between a first and second position to cover and uncover the opening. The second urging member is configured to move the rear curtain between the first and second positions. The drive unit is configured to resist the first and second urging members. The drive unit is also configured to hold the front curtain at the second position when resisting the first urging member and hold the rear curtain at the first position when resisting the second urging member.

Abstract: A method of controlling a plurality of shutter blades includes providing a shutter assembly including a solenoid having a first magnetic pole, a second magnetic pole, and a gap between the first and second poles. The shutter assembly also includes a permanent magnet moveable within the gap in a path coplanar with the solenoid, wherein movement of the permanent magnet transitions the plurality of shutter blades between an open position exposing a central opening of the shutter assembly and a closed position. The method also includes moving the plurality of shutter blades between the open and closed positions, and reducing an electrical signal applied to the solenoid while the plurality of shutter blades is in transit between the open and closed positions.

Abstract: A reliable barrier device for a camera, which is able to smoothly open and close blade members while suppressing a drive load applied when the blade members are opened and closed. Closing springs for primary and secondary blades are each interposed between corresponding ones of spring hooks on a barrier drive ring and on primary and secondary blade members. When the drive ring is rotated in a barrier opening direction, the distance between the spring hook on the ring and the spring hook for primary blade decreases and the urging force of the closing spring for primary blade decreases, which reduces a rotational torque produced by the closing springs for primary and secondary blades at barrier open state, making it possible to decrease a rotational torque produced by opening springs and acting on the drive ring at barrier open state.

Abstract: A focal plane shutter having a front film and a back film which expose a charge-coupled device to light as they move back and forth between a cover plate and a base plate, between a charging position and a discharging position at a certain time interval. The focal plane shutter includes at least one lever member which is connected to the front film and/or back film, and which amplifies an impact force generated during a charging and a discharging movement of the front film and/or back film using a lever action. An elevating member slides in a direction parallel with the movement of the front film and/or back film by the impact force amplified in the lever member. An impact absorbing unit regulates the sliding movement of the elevating member to absorb impact energy generated by the movement and stop of the front film and/or back film.

Abstract: A focal plane shutter for cameras includes: a shutter blade assembly; an electromagnet assembly; driving means that includes a mounting member mounted with an iron scrap member that cooperates with an iron core member of the electromagnet assembly; and a setting member that operates the driving means to a set position. The iron scrap member includes a shaft fitted in a mounting hole of the mounting member, an iron scrap portion provided at one end of the shaft and brought into contact with the iron core member, and a removal preventing flange provided at the other end of the shaft, a collar member is fitted to the shaft between the mounting hole and the flange, an edge of the mounting hole is formed to have an arcuate surface protruding toward the collar member, and the collar member is formed to have, on the edge side, an arcuate surface protruding toward the flange and substantially perpendicular to the arcuate surface.

Abstract: A second blade group-driving mechanism includes second blade group-driving first member and second blade group-driving second member, only the second blade group-driving second member is rotated against elastic force of a blade group-driving spring while the second blade group-driving first member engages and is locked by a locking member at start of cocking operation of the cocking member to keep a second blade group covering an exposure opening, and the second blade group-driving first member is disengaged from locking member at final stage of cocking operation, so the second blade group-driving first member can be rotated by elastic force of a second blade group-cocking spring and the second blade group is made to open the exposure opening. Starting cocking operation of a focal plane shutter is possible irrespective of the length of time during which imaging information can be transferred from an image sensor to storage via an information-processing circuit.

Abstract: In a first blade unit-driving unit which is rotated by elastic force of a first blade unit-driving spring in shooting, its driving pin rotates a first brake member counterclockwise and a second brake member clockwise against the elastic force of a coil spring fitted to a fitting shaft and against friction resistance force of a friction-providing part including a plate spring or the like at the final stage of the rotation of the first blade unit-driving unit, the plate spring being fitted to the fitting shaft, so that the first blade unit-driving unit is braked, and, at this point, one end part of the first blade unit-driving spring contacts a part to be pushed of the first brake member and controls the counterclockwise rotation of the first brake member, so that braking force to the first blade unit-driving unit acts on the first blade unit-driving unit larger and more surely.

Abstract: A blade driving device includes: a board including an opening; a blade movable between a position receding from the opening and a position overlapping at least a part of the opening; and a buffering member having a loop shape, having an elasticity, abutting the blade at an end of a movable range of the blade, and being deformable such that the loop shape is warped when abutting against the blade.

Abstract: A focal plane shutter includes: a board including an opening; blades capable of opening and closing the opening; a drive member movable between a start position and a terminal position, biased toward the terminal position, and driving the blades; a brake member supported to abut and move away from the drive member positioned at the terminal position, and biased to abut the drive member positioned at the terminal position; and a set member rotatable in only one direction, and moving the drive member from the terminal position to the start position; wherein the set member includes a drive portion abutting the brake member to move the brake member away from the drive member and then abutting the drive member to move the drive member toward the start position.

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: When photographing using an optical finer, a hold member rotates, and a pressing member pushes a pushed portion of an iron piece member to rotate an unlocking member for a first blade and an unlocking member for a second blade to bring the iron piece member into contact with an iron core member of an electromagnet. When photographing using an electronic finder, a permanent magnet rotor of an electromagnetic device is rotated in a state where the electromagnet is not magnetized, a deterring member is made to face the operation locus of a deterred portion of the unlocking member for a second blade, and then, the hold member is rotated. Thereby, the unlocking member for a second blade is deterred by the deterring member so as to allow observation using the electronic finder without pushing the locking member for a second blade.

Abstract: Provided are a focal plane shutter, which can offer a live view function, and improve a control velocity of a shutter speed to reduce a time interval between shootings, a photographing apparatus including the focal plane shutter, and a photographing method for the photographing apparatus. The focal plane shutter includes: a front curtain; a rear curtain; a support part coupled to one side of the front curtain and the rear curtain; and a movable part movably contacting one side of the support part, wherein either the front curtain or the rear curtain is independently moved by the motion of the movable part.

Abstract: A focal plane shutter having a front film and a back film which expose a charge-coupled device to light as they move back and forth between a cover plate and a base plate, between a charging position and a discharging position at a certain time interval. The focal plane shutter includes at least one lever member which is connected to the front film and/or back film, and which amplifies an impact force generated during a charging and a discharging movement of the front film and/or back film using a lever action. An elevating member slides in a direction parallel with the movement of the front film and/or back film by the impact force amplified in the lever member. An impact absorbing unit regulates the sliding movement of the elevating member to absorb impact energy generated by the movement and stop of the front film and/or back film.

Abstract: Foreign substances adhered to a focal plane shutter are shaken off by vibrationally driving the shutter a plurality of times in succession while the focal plane shutter, which controls the incidence of light on a photoelectric transducer converting an optical image of a photographic object into an electrical signal, shields the photoelectric transducer from light incident thereon. In other words, implementing vibrational removal of adhered foreign substances by means of overloading the focal plane shutter.

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 shaft; 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 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: A damping system for an electromagnetically operable rotary shutter includes a damper for arresting the motion of a pivotally supported shutter actuating drive arm. The damper has a first portion composed of an ultrahigh density polyethylene and a second portion composed of a damped polyurethane that are arranged to strike one against the other during operation of the shutter. Moreover the first portion of the damper has a straight edge and the second portion has a surface that is curved so as to maintain substantially a point contact between the two portions throughout the duration of the impact between the two. The combination of materials and configuration of the surfaces of the two portions provides energy absorption while avoiding the adherence of the two portions upon impact.

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: 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 shutter/filter unit as an optical apparatus includes a shutter actuator, a filter actuator, a shutter drive ring, two shutter blades, and one ND filter, which are connected to a driving source body in series. The shutter blades are rotationally driven via the shutter drive ring so as to open and shut by the shutter actuator, and the ND filter is back and forth and rotationally driven by the filter actuator directly. The shutter blades and the ND filter are coaxially supported to a blade-support pin, and are rotationally driven independently. According to this apparatus, a conventional optical apparatus having a light-exclusion member and a light-attenuating member housed therein is further miniaturized so as to contribute miniaturization to an image-pickup apparatus, such as a camera, having the optical apparatus mounted thereon.

Abstract: A focal plane shutter for cameras is provided with a shutter blade which can be actuated to both directions for opening and for closing a photographing optical path by an electromagnetic apparatus. When a rotor is rotated to the direction corresponding to the direction of conduction of coils an actuating member which is formed in one with the rotor make arms rotate by its actuating pin and actuates four blades of the shutter blade about upward and downward direction. A brake member rotatably arranged together with on a friction plate on a shaft has bent portions formed near tip portions of the arm portions which are inserted in a slot on a shutter base plate. An operation for opening the shutter blade is braked by the actuating pin contacting, pressing and moving one of the bent portions at termination stage, and a closing operation is braked by the actuating pin contacting, pressing and moving another bent portion at the termination stage.

Abstract: A focal-plane shutter for digital still cameras includes a first blade and a second blade, each having a plurality of arms and at least one blade component pivotally supported thereby; a driving member for the first blade, opening an exposure aperture through the first blade; a driving member for the second blade, closing the exposure aperture through the second blade; a retaining means for the first blade and a retaining means for the second blade, retaining individual driving members at positions where the exposure operation is started, immediately before the exposure operation is started, and releasing their retaining forces at preset timing when the exposure operation is started; and a cocking member for actuating the driving member for the second blade when moved from the initial position to the cocked position thereof, and actuating the driving member for the first blade in photography.

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 comprises a shutter plate having a shutter opening, opening blades and closing blades for opening and closing the shutter opening, and arms connected by connector portions to the opening and closing blades for driving the blades parallel to the shutter opening to effect an exposure. Resilient stopping members are disposed to make resilient contact with the opening blades at opening positions thereof where the opening blades are retracted from the shutter opening, and other resilient stopping members are disposed to make resilient contact with the closing blades at closing positions thereof where the closing blades close the shutter opening. The resilient stopping members are positioned on opposite sides of the connector portions so that when the blades strike the stopping members, reaction forces are produced which cancel each other out thereby preventing excessive wear of the connector portions.