JP5000929B2 - Camera blade drive - Google Patents

Description

  The present invention relates to a camera blade drive device in which a shutter blade and a light amount control blade (aperture blade, filter blade) are arranged in one blade chamber.

  In the shutter device described in Patent Document 1 below, two shutter blades are reciprocally rotated in opposite directions simultaneously by the driving means, and in the case of an opening operation, the shutter device starts to open from the center of the exposure aperture, In the case of the closing operation, the exposure opening is closed last in the center. When two shutter blades perform such an operation, when the closing operation is performed, each shutter blade does not operate on a plane perpendicular to the optical axis, and tilts or bends. Because of this, the tip portions of the two may collide with each other. Therefore, the tip portions are lengthened so that the tip portions overlap even when the exposure opening is fully opened. However, with such a configuration, since each shutter blade becomes large, the intermediate plate is interposed between the two ground plates in order to prevent the shutter blades from colliding with each other without lengthening the tip of the shutter blade. Patent Document 2 below discloses a shutter device in which two blade chambers are configured by partitioning and two shutter blades are operated in separate blade chambers.

  Incidentally, the shutter device and the light amount control device (aperture device, filter device) may be configured as one unit. In such a case, the shutter blade and the light amount control blade (aperture blade, filter blade) are provided. It is necessary to avoid collision during operation. Therefore, when configuring such a unit, conventionally, two blade chambers are configured as described above, shutter blades are disposed in one blade chamber, and light quantity control blades are disposed in the other blade chamber. It was common. However, such a configuration has never been preferable in terms of cost in view of the fact that the intermediate plate is a considerably large member and that its mounting configuration is necessary. Therefore, even if two shutter blades and one diaphragm blade are arranged in one blade chamber without providing an intermediate plate, a configuration in which no collision occurs between the blades during operation is as follows. Is known from US Pat. In this configuration, if the circular light amount control opening formed on the aperture blade is covered with the ND filter sheet, the shutter device and the filter device are unitized. Thus, the present invention relates to a camera blade drive device in which a shutter blade and a light amount control blade are arranged in one blade chamber.

JP 2003-177447 A JP 2005-99167 A JP 2004-205996 A

In the case of the blade driving device described in Patent Document 3, the two shutter blades are adjacent to each other, part of them always overlap in any operating state, and the diaphragm blade is only one shutter blade. Adjacent and arranged so that some of them always overlap in any operating state. The two shutter blades do not have long tip portions like the shutter blades described in Patent Document 1, but when the closing operation is performed, the two shutter blades start from their rotating shaft side like a scissors. Since it has the shape which overlaps in order toward the front-end | tip part, both front-end | tip parts do not collide. Instead, like a shutter blade having a long tip, it cannot be opened from the center of the exposure opening and closed at the end of the center. In addition, the two shutter blades do not overlap the light amount control opening during operation even when the diaphragm blades are in the exposure opening or in the retracted state. Therefore, even if the shutter blades are tilted or bent during operation, none of the tip portions collide with the edge of the light amount control opening.

  However, the reason why the shutter blade and the diaphragm blade do not collide with each other may depend on the shape of the blade, but the main reason is that the shutter blade driving means and the diaphragm blade driving means cause such a collision. This is because they are arranged in a positional relationship that cannot be obtained. However, depending on the specifications of the camera, it may not be possible to arrange both driving means in such a convenient positional relationship. In particular, recently, cameras have been downsized, and the blade driving device is severely restricted by the size and shape of its main plate, and is more likely not to be arranged in that way. Moreover, as in the shutter blade described in Patent Document 1, when it is desired to elongate the tip portion, the shutter blade is inclined or bent easily, and the operating range of the tip portion is increased. It becomes more difficult to avoid collision with the edge of the light quantity control opening.

  The present invention has been made to solve such problems. The object of the present invention is to arrange a shutter blade and a light amount control blade having a light amount control opening in one blade chamber. In the camera blade driving device in which they are reciprocally rotated by the respective driving means, even if the tip of the shutter blade overlaps the light amount control opening of the light amount control blade during operation, the shutter It is an object of the present invention to provide a camera blade driving device in which the tip portion of the blade does not collide with the edge of the light amount control opening due to the inclination or deflection of the blade.

In order to achieve the above object, the camera blade driving device of the present invention has two ground planes that have an opening for exposure and constitute one blade chamber therebetween, and rotate in the blade chamber. It is arranged in such a manner that it has at least one shutter blade that opens and closes the exposure opening by the first driving means, and a light amount control opening, and is rotatably arranged in the blade chamber. a light control blade for performing forward and backward actuating against the exposure opening portion by the second drive means, the at least as a part thereof in the vane chamber overlaps with the at least one shutter blade and the light control blade rotatably arranged to have the second driving means by said light control blade simultaneously rotated so is it the exposure opening in opposite direction to that between the one shutter blade and light amount control blades So that and a, at least a part overlaps the auxiliary blade of the light quantity control opening when said light control blade without advancing and retracting are dismissed from the exposure opening to.

In that case, before Symbol least one shutter blade, a two shutter blades which is rotated simultaneously in opposite directions by the first driving means, their tip overlap when fully open the exposure opening portion One shutter blade is arranged so that a part of the shutter blade overlaps the light amount control blade with the auxiliary blade in between, and the other shutter blade is a part of the shutter blade. If the light quantity control blades overlap with each other, but do not overlap with the auxiliary blades and are arranged so as not to interfere in operation, a camera blade drive device excellent in performance can be obtained. It is done.

  In the present invention, the light amount control blade may be a diaphragm blade, and the light amount control opening may be an opening smaller than the exposure opening. In the filter blade, the light amount control opening may be covered with an ND filter sheet.

  The present invention provides an auxiliary blade that is reciprocally rotated in the opposite direction simultaneously by the same drive means as the light amount control blade, although the shutter blade and the light amount control blade are arranged in one blade chamber. Since the auxiliary blade is always operated between the light amount control blade and the shutter blade so as not to advance and retreat to the exposure opening, the tip of the shutter blade is used for light amount control of the light amount control blade during operation. Even when the opening overlaps, the tip of the shutter blade does not collide with the edge of the light amount control opening due to the inclination or bending of the shutter blade.

  Embodiments of the present invention will be described with reference to the illustrated examples. The present invention can be applied to a blade driving device in which a shutter device and a diaphragm device are unitized, and also to a blade driving device in which a shutter device and a filter device are unitized. In addition, these devices can be employed in cameras that use a silver salt film, and can also be employed in digital cameras including cameras for various information terminal devices. However, in the embodiment, a case where a blade driving device in which a shutter device and a diaphragm device are unitized is adopted for a digital camera will be described, and the other matters will be appropriately described in the process. 1 is a plan view of the embodiment showing the photographing standby state, and FIG. 2 is a cross-sectional view of the embodiment showing the overlapping relationship of the constituent members in an easily understandable manner. 3 is a plan view showing a state in the middle of the closing operation of the shutter blades started from the state of FIG. 1, and FIG. 4 is a plan view showing the state after the closing operation is completed. 5 is a plan view showing a state in which the aperture blade has entered the exposure opening from the state of FIG. 1, and FIG. 6 is a plan view showing a state in which the shutter blade has been closed from the state of FIG.

  This embodiment has two shutter blades that are simultaneously reciprocally rotated in opposite directions by the first driving means in one blade chamber, and a light amount control opening smaller than the exposure opening. A diaphragm blade that is reciprocally rotated by the means, and an auxiliary blade that is disposed so as to overlap between the shutter blade and the diaphragm blade and is reciprocated by the second driving means but does not advance or retreat to the exposure aperture; It is comprised as a blade | wing drive device provided with. First, the configuration of this embodiment will be described mainly with reference to FIGS. The base plate 1 of the present embodiment is made of synthetic resin and has a relatively thick and complicated shape as can be seen from FIG. As shown in FIG. 1, the base plate 1 is formed with a circular exposure opening 1a at a substantially central portion thereof, and there are two symmetrical positions with the exposure opening 1a in between. Two arc-shaped long holes 1b and 1c are formed. And this ground plate 1 comprises a blade chamber between the auxiliary ground plate 2 described later, and two actuator chambers formed between two stator frames 3 and 4 described later on the side opposite to the blade chamber. is doing.

  Four blade shafts 1d, 1e, 1f, and 1g and eight stopper shafts 1h, 1i, 1j, 1k, 1m, 1n, 1p, and 1q are erected integrally on the surface of the base plate 1 on the blade chamber side. Has been. In addition, although a plurality of mounting shafts are erected by integral molding on the surface on the blade chamber side, these are not shown in FIG. 1, and two of them are shown in FIG. Only 1r and 1s are shown. As shown in FIG. 2, the base plate 1 has four mounting shafts 1t, 1u, 1v, and 1w and two rotor shafts 1x and 1y that are integrally formed on the surface on the actuator chamber side. It is installed. The blade chamber side mounting shaft including the two mounting shafts 1r and 1s passes through the hole formed in the auxiliary base plate 2, and its tip is deformed into a bowl shape by heat melting, and the auxiliary base plate 2 is attached. ing. Further, the mounting shafts 1t, 1u, 1v, and 1w on the actuator chamber side pass through holes formed in the stator frames 3 and 4, and their tips are deformed into a bowl shape by heat melting, so that the stator frame 3 , 4 are attached.

  In FIG. 1, the auxiliary base plate 2 is not shown, but the planar shape is substantially the same as that of the base plate 1, and the central portion thereof corresponds to the above-described exposure opening 1a. An opening 2a for exposure (see FIG. 2) is formed. However, in the present embodiment, since the exposure opening 1a has a smaller diameter, the exposure opening for photographing is restricted by the exposure opening 1a. The auxiliary base plate 2 has two long holes 2b and 2c (see FIG. 2) having substantially the same shape as the arc-shaped long holes 1b and 1c. Further, the auxiliary base plate 2 includes the four blade shafts 1d, 1e, 1f, 1g, eight stopper shafts 1h, 1i, 1j, 1k, 1m, 1n, 1p, 1q, and mounting shafts 1r, 1s. A plurality of holes are formed for fitting with a plurality of mounting shafts including the holes 2d, 2e, 2f, 2g for fitting the blade shafts 1d, 1e, 1f, 1g, Only the holes (not shown) for fitting the mounting shafts 1r and 1s are shown in FIG.

  In this way, two shutter blades 5, 6, one diaphragm blade 7, and one auxiliary blade 8 are arranged in the blade chamber formed between the base plate 1 and the auxiliary base plate 2. However, in the overlapping order, the diaphragm blade 7 serving as the light quantity control blade is closest to the ground plate 1 side, the next is the shutter blade 6 and the auxiliary blade 8, and the shutter is closest to the auxiliary ground plate 2 side. The blade 5. The shutter blades 5 and 6 have long holes 5a and 6a and are rotatably attached to the blade shafts 1d and 1e. The diaphragm blade 7 has a light amount control opening 7a and a long hole 7b having a diameter smaller than that of the exposure opening, and is rotatably attached to the blade shaft 1f. The auxiliary blade 8 has a long hole 8a and is rotatably attached to the blade shaft 1g. The shutter blades 5 and 6 of the present embodiment are shutter blades of the type described in Patent Document 1, as can be seen from the shape shown in FIG.

  On the other hand, an actuator that is a driving unit for the shutter blades 5 and 6 and an actuator that is a driving unit for the diaphragm blades 7 and the auxiliary blades 8 are arranged on the opposite side of the blade chamber. These two actuators have exactly the same configuration, and are substantially the same as the configurations of the actuators described in Examples 3 to 5 (FIGS. 6 to 11) of JP-A-2005-241866. However, since the specific configurations of these actuators are not directly related to the present invention, the shape of the stator is omitted in FIG. 1, and only the planar shapes of the rotors 9 and 10 are shown. . Therefore, if there is an unclear point in the planar shape of the members constituting the stator, refer to the above publication.

  Therefore, first, the rotors 9 and 10 of the present embodiment are rotatably attached to the rotor shafts 1x and 1y, respectively. These rotors 9 and 10 are made of permanent magnets, and are constituted by cylindrical portions 9a and 10a magnetized in two poles in the radial direction, arm portions 9b and 10b, and output pins 9c and 10c. Yes. One output pin 9 c is inserted into the blade chamber from the long hole 1 b of the base plate 1, fits into the long holes 5 a and 6 a of the shutter blades 5 and 6, and the tip is extended from the long hole 2 b of the auxiliary base plate 2. It protrudes outside the feather chamber. The other output pin 10 c is inserted into the blade chamber from the long hole 1 c of the base plate 1, is fitted into the long holes 7 b and 8 a of the aperture blade 7 and the auxiliary blade 8, and the tip thereof is the long hole of the auxiliary base plate 2. It protrudes out of the blade chamber from 2c. In this type of actuator, there is also known an actuator in which the arm portions 9b and 10b and the output pins 9c and 10c are made of a synthetic resin.

  The stator frames 3 and 4 of this embodiment are formed with hollow bobbin portions 3a and 4a, respectively, and coils 11 and 12 are wound around the outer sides thereof. Moreover, the yokes 13 and 14 which are U-shaped and have two leg portions are inserted into the hollow portions of the bobbin portions 3a and 4a, and the tip ends of the two leg portions are pole portions. As opposed to the peripheral surfaces of the cylindrical portions 9a, 10a. In this embodiment, the bobbin portions 3a and 4a are integrally formed on the stator frames 3 and 4, but this type of actuator is also known as a separate member. ing. In the case of the actuator configured as described above, the rotors 9 and 10 are rotated only within a predetermined angle range in a direction corresponding to the energization direction for the coils 11 and 12.

  Next, the operation of this embodiment will be described. FIG. 1 shows a photographing standby state, in which the shutter blades 5 and 6 have the exposure opening 1a that restricts the exposure opening fully opened, and their long and thin tip portions overlap each other. . Further, the diaphragm blade 7 has not entered the exposure opening 1a and is in a retracted state. For this reason, a solid-state image sensor (not shown) is exposed to subject light, and the photographer can observe the subject image on the monitor. At this time, the coils 11 and 12 of the respective actuators are not energized. However, as is well known, at this time, the rotors 9 and 10 are counterclockwise due to the opposing arrangement relationship between the magnetic poles magnetized on the cylindrical portions 9a and 10a and the two magnetic pole portions of the yokes 13 and 14, respectively. It is biased to rotate in the direction. Therefore, the output pin 9c tries to rotate the shutter blade 5 in the clockwise direction and the shutter blade 6 in the counterclockwise direction, but the shutter blades 5 and 6 are pressed against the stopper shafts 1i and 1h, and this state is maintained. Has been. The output pin 10c tries to rotate the diaphragm blade 7 clockwise and the auxiliary blade 8 counterclockwise. The blades 7 and 8 are pressed against the stopper shafts 1j and 1k. State is maintained.

  When the release button is pressed at the time of shooting, in the initial stage, the subject light is first measured by the photometry circuit. Actual photographing is started after entering the exposure opening 1a. First, a case where it is determined that photographing is performed without restricting subject light will be described. In that case, the charge accumulated in the solid-state image sensor is immediately released, imaging is started, and new charges are accumulated in the solid-state image sensor. When a predetermined time elapses, a forward current is supplied to the coil 11 by a signal from the exposure time control circuit. As a result, the rotor 9 is rotated clockwise, so that the shutter blade 5 is rotated counterclockwise by the output pin 9c, the shutter blade 6 is rotated clockwise, and the two shutter blades 5, 6 are rotated. To perform the closing operation. The state during the closing operation is shown in FIG.

  As can be seen from the state of FIG. 3, the two shutter blades 5 and 6 of the present embodiment are formed in a shape close to ideal so as to finally close the central region of the exposure opening 1a. And since these front-end | tip parts operate | move so that mutual overlap may be deepened, the shutter blades 5 and 6 do not collide during this closing operation. Further, in this state, the shutter blade 5 overlaps the light amount control opening 7 a of the aperture blade 7. For this reason, if it tilts or bends during its operation, the tip of the tip collides with the inner edge of the circular light amount control opening 7a. Since the auxiliary blade 8 is disposed between the diaphragm blades 7 and covers the light quantity control opening 7a, such a collision cannot occur. In addition, although the shutter blades 5 and 6 of the present embodiment have the shape of the type described in Patent Document 1 as described above, they have the shape of the type described in Patent Documents 2 and 3. The same is true for the shutter blades.

  The shutter blades 5 and 6 perform the closing operation in this way, and when the exposure opening 1a is closed, immediately after that, the shutter blade 5 comes into contact with the stopper shaft 1n, and the shutter blade 6 The front end portion comes into contact with the stopper shaft 1m and stops. FIG. 4 shows the stop state. As can be seen from FIG. 4, if the shape of the portion of the shutter blade 5 covering the exposure opening 1a is made slightly larger, the exposure opening 1a can be covered only by the shutter blade 5. become. Therefore, the blade driving device of the present invention may have only one shutter blade. In the case of the present embodiment, as described above, the auxiliary blade 8 completely covers the light amount control opening 7a. However, it is not always necessary to configure the auxiliary blade 8 and the tip of the shutter blade 5 is used. Depending on the shape of the part and the operation trajectory, only a part may be covered. Further, in the stop state of FIG. 4, the tip of the shutter blade 6 is not in contact with the stopper shaft 1m, but after contacting with the stopper shaft 1m at the end of the closing operation, one of the shutter blades is stopped when stopped. The configuration in which the tip portion is in such a non-contact state is well known as a configuration for suppressing the bounce of the shutter blades 5 and 6 and stopping the shutter blades 6 and 6 at an early stage.

  In this way, when the state shown in FIG. 4 is reached, the charge accumulated in the solid-state imaging device is transferred to the storage device as imaging information. When the transfer is completed, a current in the reverse direction is supplied to the coil 11 unlike the above. Thereby, the rotor 9 is rotated counterclockwise, and the shutter pin 5 is rotated clockwise by the output pin 9c, and the shutter blade 6 is rotated counterclockwise, whereby the two shutter blades 5 are rotated. , 6 is opened. Then, when the shutter blades 5 and 6 are fully opened, the shutter blade 5 comes into contact with the stopper shaft 1i and the shutter blade 6 comes into contact with the stopper shaft 1h and stops. Thereafter, when the power supply to the coil 11 is cut off, the state shown in FIG. 1 is restored.

  As can be seen from the above description, the auxiliary blade 8 in this embodiment is not provided, and the shutter blade 6 covers the light amount control opening 7a of the diaphragm blade 7 even during its operation. Although it is possible to avoid a collision between the tip of the shutter blade 5 and the edge of the light amount control opening 7a, in such a case, the shutter blade 6 becomes large, and thus the base plate 1 is enlarged. However, according to the configuration of this embodiment, it is not necessary to do so. Further, as can be seen from the description of the operation of the auxiliary blade 8 to be described later, in this embodiment, the shutter blade 6 is configured so as not to interfere even if operated on the substantially same surface as the auxiliary blade 8. In spite of the provision of the blades, the distance between the main plate 1 and the auxiliary main plate 2 can be reduced.

  Next, a case will be described in which when the release button is pressed during shooting, it is determined by the measurement result of the photometry circuit that shooting is performed with subject light limited. In that case, first, a forward current is supplied to the coil 12. Accordingly, the rotor 10 is rotated clockwise from the state shown in FIG. 1, so that the diaphragm blade 7 is rotated counterclockwise and the auxiliary blade 8 is rotated clockwise by the output pin 10 c. Therefore, the diaphragm blade 7 enters the exposure opening 1a, but the auxiliary blade 8 is operated in a direction away from the exposure opening 1a, so that the auxiliary blade 8 does not collide with the shutter blade 6. impossible. When the center of the light amount control opening 7a reaches the center position of the exposure opening 1a, the diaphragm blade 7 contacts the stopper shaft 1p, and the auxiliary blade 8 contacts the stopper shaft 1q and stops. FIG. 5 shows the stopped state. Naturally, the tip of the shutter blade 5 overlaps the auxiliary blade 8 even in this state. Further, the reason why the auxiliary blade 8 is not in contact with the stopper shaft 1q in this stopped state is the same as that of the shutter blade 6 in the state of FIG.

  In this state, as described above, actual shooting is started, and when a forward current is supplied to the coil 11, the shutter blades 5 and 6 are closed. Since there is no light amount control opening 7a of the diaphragm blade 7 in the operation locus of the tip of the blades 5 and 6, there is no collision between them, and the shutter blade 5 is connected to the auxiliary blade 8 and It is operated while maintaining the overlapping state. FIG. 6 shows a state in which the closing operation is completed and the shutter blades 5 and 6 are stopped. In the state of FIG. 6, when the electric charge accumulated in the solid-state imaging device is transferred to the storage device as imaging information, a current in the opposite direction is supplied to the coil 11 unlike the above, and the shutter blades 5, 6 Opening operation is performed. On the other hand, since the current in the reverse direction is supplied to the coil 12 as well, the rotor 10 is rotated counterclockwise, and the aperture blade 7 is rotated clockwise by the output pin 10c. The auxiliary blade 8 is rotated counterclockwise. When the diaphragm blade 7 is completely retracted from the exposure opening 1a, the diaphragm blade 7 contacts the stopper shaft 1j and the auxiliary blade 8 contacts the stopper shaft 1k and stops. Thereafter, when the power supply to the two coils 11 and 12 is cut off, the state shown in FIG. 1 is restored.

  As described above, in this embodiment, the auxiliary blade 8 is disposed between the shutter blade 5 and the diaphragm blade 7, and the light amount control of the front end portion of the shutter blade 5 and the diaphragm blade 7 is performed without increasing the size of the device. Although the collision with the opening 7a is suitably prevented, it plays an important role in addition to that. That is, as described above, in the photographing standby state, even if the coil 12 is not energized, the rotor 10 is given a force that rotates counterclockwise. However, the power is not strong. For this reason, when the auxiliary blade 8 is not provided, depending on how the camera is held, the diaphragm blade 7 may easily rotate counterclockwise due to gravity, and when shooting without limiting the subject light. There is a possibility that a part of the diaphragm blade 7 faces the opening 1a for exposure. However, when the auxiliary blades 8 are provided as in the present embodiment, in order for the diaphragm blades 7 to rotate counterclockwise due to gravity, a force for rotating the auxiliary blades 8 counterclockwise against the gravity is used. As a result, the diaphragm blade 7 cannot rotate as a result, and the state of FIG. 1 can be maintained.

  Although this embodiment has been described as a blade driving device in which the shutter device and the diaphragm device are unitized, an ND filter sheet can be attached to the diaphragm blade 7 of this embodiment so as to cover the light quantity control opening 7a. For example, the diaphragm blade 7 becomes a filter blade, and the blade driving device of this embodiment is a blade driving device in which the shutter device and the filter device are unitized. In this case, the light amount control opening 7a may be smaller than the exposure opening 1a as in the present embodiment, but may be the same or larger. Further, although this embodiment has been described in the case of being adopted in a digital camera, when it is adopted in a camera using a silver salt film, the shutter blade 5 is set in the state shown in FIG. , 6 are caused to reciprocate, and the aperture blade 7 and the auxiliary blade 8 are operated in the same manner as in this embodiment. All of these aspects are embodiments of the present invention.

It is a top view of the Example which shows a photography standby state. It is sectional drawing of the Example which showed clearly the overlapping relationship of the structural member. It is a top view which shows the state in the middle of the closing operation | movement of the shutter blade | wing started from the state of FIG. It is a top view which shows the completion | finish state of the closing operation | movement of the shutter blade | wing started from the state of FIG. It is a top view which shows the state which the aperture blade approached into the exposure opening from the state of FIG. It is a top view which shows the completion | finish state of the closing operation | movement of the shutter blade | wing started from the state of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground plate 1a, 2a Opening for exposure 1b, 1c, 2b, 2c, 5a, 6a, 7b, 8a Long hole 1d, 1e, 1f, 1g Blade shaft 1h, 1i, 1j, 1k, 1m, 1n, 1p, 1q Stopper shaft 1r, 1s, 1t, 1u, 1v, 1w Mounting shaft 1x, 1y Rotor shaft 2 Auxiliary base plate 2d, 2e, 2f, 2g Hole 3, 4 Stator frame 3a, 4a Bobbin portion 5, 6 Shutter blade 7 Aperture Blade 7a Light quantity control opening 8 Auxiliary blade 9, 10 Rotor 9a, 10a Cylindrical portion 9b, 10b Arm portion 9c, 10c Output pin 11, 12 Coil 13, 14 Yoke

Claims (4)

Two ground planes having an exposure opening and constituting one blade chamber between them, and an opening / closing operation of the exposure opening by the first driving means, which is rotatably arranged in the blade chamber A light amount control that has at least one shutter blade for performing light amount and an opening for light amount control, and is rotatably disposed in the blade chamber, and advancing and retracting the opening for exposure by the second driving means and the blade, a portion in the vane chamber is rotatably disposed between said at least one shutter blade and the light control blade and the overlapping manner said at least one shutter blade and light amount control blades and has the second the light control blade but rotated without advancing and retreating in the exposure opening portion in opposite directions simultaneously with the light control blade by a driving means not dismissed from the exposure opening Camera blade drive device according to claim which has an at least partially overlaps the auxiliary blade of the light quantity control opening time. The at least one shutter blade is two shutter blades that are simultaneously rotated in opposite directions by the first driving means, and the tip portions of the shutter blades overlap when the exposure opening is fully opened. One shutter blade is arranged so that a part thereof overlaps the light amount control blade with the auxiliary blade in between, and the other shutter blade has a part of the one shutter blade and the light amount control blade. The camera wing drive device according to claim 1, wherein the camera wing drive device is disposed so as not to overlap the auxiliary blades . The light control vanes, a diaphragm blade, the light quantity control opening, camera blade drive according to claim 1 or 2, characterized in a small opening der Rukoto than the exposure opening portion apparatus. The light control vanes, a filter blade, the light quantity control opening, camera blade drive device according to claim 1 or 2, characterized that you have been covered by the ND filter sheet.