JP5001108B2 - Camera blade drive - Google Patents

Description

  The present invention relates to a camera blade driving device in which a shutter device, a diaphragm device, a filter device, and the like are unitized individually or in plural.

  A lens shutter device (hereinafter referred to as a shutter device), a diaphragm device, and a filter device employed in a camera each have a blade member, and they are reciprocated by an actuator. In many cases, the shutter device has two shutter blades, but in the case of a camera having a small lens diameter, there is also one in which only one shutter blade is used. In addition, in the case of an aperture device used in a camera having a small lens aperture, a single aperture blade having a small circular opening is provided, and the opening is advanced and retracted as required in the imaging optical path. There is a lot going on.

  Further, in the case of the filter device, it has a shape similar to that of the above-described diaphragm blade (however, the opening may be substantially the same size as the photographing optical path regulating opening formed on the base plate) 1 Many blade members have ND filter plates attached so as to cover the openings, and are used as filter blades. Prepare two blade members having such openings, In the meantime, it is also conceivable that the blade member manufactured only by the ND filter plate is superposed, and the three blade members are simultaneously reciprocated in the same direction by the same angle. The shutter device, the diaphragm device, and the filter device may be individually unitized, but the two or more devices may be united. Further, these shutter blades, aperture blades, and filter blades have recently been reciprocally rotated using an electromagnetic actuator as a drive source.

By the way, such units of various blade driving devices are configured by attaching many members directly or indirectly to one ground plane. In recent years, the base plate is made of a synthetic resin because it is advantageous for cost reduction and weight reduction. However, in addition to the various blades as described above and electromagnetic actuators for driving the same, it is necessary to attach a lens in some cases. There is a fact that it must be thick. On the other hand, recent cameras, not only miniaturization has been rapidly even thinner, there is a demand arranged close to the working surface of the blade as possible taking lens. In particular, in the case of a small camera equipped with a solid-state image sensor, a solid-state image sensor is arranged close to one surface of the blade driving device and a photographing lens is arranged close to the other surface to reduce the thickness. It is normal to do. However, when the ground plane is thick, the thickness is inevitably limited.

  Therefore, in order to eliminate such a restriction, a thin plate member in which an opening for a photographing optical path is formed is placed on the surface of the ground plate on the solid-state imaging device side, and the ground plate is much larger than that. The following Patent Documents 1 and 2 describe a configuration in which a part of the photographing lens can be inserted into the opening of the base plate by forming the opening. In this case, since the opening of the thin plate member is usually used as the exposure opening, the thin plate member is often referred to as a diameter regulating plate. The present invention relates to a camera blade driving device that includes such a thin plate member and can be configured as the various devices described above.

JP-A-2005-241725 JP 2005-309276 A

  By the way, when the thin plate member as described above is provided, it has to be in close contact with the base plate, and conventionally, it is attached to the base plate made of synthetic resin by screws or heat caulking. However, these mounting methods increase the cost due to an increase in the number of parts and the troublesome mounting work. Therefore, in the case of the camera blade drive device described in Patent Documents 1 and 2, when the cover plate for constituting the blade chamber is attached to the ground plate, the cover plate is arranged around the thin plate member. It is made to press-contact with the peripheral part of a ground plane. However, such a configuration is suitable for attachment of the thin plate member, but since the cover plate is a fairly thin member, it is difficult to make the distance between the thin plate member and the cover plate uniform. However, since a deformation is easily caused when a load is applied to a region in the vicinity of the opening for the photographing optical path, there is a problem that handling at the manufacturing stage becomes extremely troublesome.

  The present invention has been made to solve such problems, and the object of the present invention is to simply assemble a thin plate member to the ground plate simply by devising the shape of the cover plate and the blades. It is another object of the present invention to provide a camera blade driving device in which the distance between the thin plate member and the cover plate is uniformly obtained and is not deformed by a normal load.

To achieve the above object, a camera blade driving device of the present invention, the base plate and the main plate made of a synthetic resin having an opening formed around the optical axis, the optical axis at the center An exposure opening is formed by at least one of a thin plate member having an opening formed smaller than the opening of the thin plate and superposed on the base plate, and an opening of the thin plate member formed around the optical axis. the have an opening for restricting the cover plate constituting the blade chamber between the mounting et been pre Symbol sheet member to the base plate across the thin plate member, front Symbol blade between the base plate At least one blade that is rotatably attached to the base plate in a room and is reciprocated to move back and forth to the exposure opening, and the cover plate has an opening in the cover plate. In the vicinity of And at least one ridge portion is formed toward the thin plate member, and the protruding portion is brought into contact with the thin plate member when attached to the ground plate, and the at least one blade has the protrusion. to so that have a relief hole which is passed through the ridges.

  In that case, in the blade chamber, two blades that are simultaneously rotated in opposite directions by the same drive source are rotatably attached to the main plate, and the escape hole is formed by the blades of the blades. It may be formed in both of them, and the same protrusion may be penetrated through the escape holes. In addition, the cover plate has at least two protrusions, and in the blade chamber, the first blade reciprocated by a first drive source and the second drive source reciprocate. Second blades to be rotated are rotatably attached to the main plate, and the blades are respectively formed with the relief holes, and the relief holes are different from each other. You may make it penetrate the shape part.

  The thin plate member and the cover plate are partitioned by an intermediate plate to form two blade chambers, the first blade is disposed in one blade chamber, and the second blade is disposed in the other blade chamber. The intermediate plate is formed around the optical axis and restricts an exposure opening by at least one of the thin plate member and the opening of each of the cover plates, and the protrusion. The cover plate may have at least one hole penetrating the shape portion, and in that case, the cover plate has substantially the same shape as the protruding portion toward the intermediate plate. At least one protrusion may be provided, and the protrusion may be configured to press the intermediate plate against the ground plate when the cover plate is attached to the ground plate.

  Furthermore, the protruding portion may have a bent shape from the plate surface of the cover plate, or may have a shape protruding from the plate surface of the cover plate. Further, the cover plate has a plurality of hook portions that are bent and elastic at the periphery thereof, and the ground plate has a plurality of engagement portions at the periphery thereof, When the cover plate is attached to the base plate by hooking the hook portion to the engaging portion, the cover plate becomes a low-cost and easy-to-assemble device.

  The present invention relates to a camera blade driving device in which a thin plate member is brought into close contact with a thick synthetic resin base plate so that a blade chamber is formed between the thin plate member and the cover plate. Providing at least one protrusion in the vicinity of the periphery of the opening for the optical path, and providing a relief hole in the blade to allow one of the protrusions to pass through the protrusions. Since the thin plate member can be brought into close contact with the ground plate at the tip of the plate, the thin plate member can be easily attached to the ground plate, and the interval between the thin plate member and the cover plate can be suitably obtained by the projecting portion, and also easily Has a feature that the cover plate cannot be deformed.

  Embodiments of the present invention will be described with reference to six illustrated examples. In addition, although the blade drive device for a camera of the present invention can be used for both a digital camera and a film camera, each embodiment is configured as a blade drive device for a camera built in an information terminal device. Is. Therefore, those operations will be described in the case where they are adopted in a digital camera. 1 to 3 are for explaining the first embodiment, and FIGS. 4 to 6 are for explaining the second embodiment. 7 to 9 are for explaining the third embodiment, and FIGS. 10 to 12 are for explaining the fourth embodiment. Further, FIGS. 13 to 15 are for explaining the fifth embodiment, and FIGS. 16 and 17 are for explaining the sixth embodiment.

  A first embodiment will be described with reference to FIGS. The present embodiment is configured as a single shutter device. FIG. 1 is a plan view showing a photographing standby state, FIG. 2 is a cross-sectional view for explaining the overlapping relationship of components, and FIG. 3 is a plan view showing a state immediately after the photographing is finished. It is. First, the configuration of this embodiment will be described. The ground plane 1 is made of a synthetic resin and is a relatively thick member as shown in FIG. 2 because many members need to be attached. In the case of this embodiment, when incorporated in the camera, a photographing lens (not shown) is disposed on the back side of the base plate 1 in FIG. 1, that is, on the lower side of the base plate 1 in FIG. become. In order to place the photographic lens close to an operating surface of a shutter blade 3 to be described later, in FIG. 2, a circular concave portion 1 a centering on the optical axis is formed on the lower surface side of the base plate 1. Once formed, the photographic lens is inserted there.

  Further, a circular opening 1b centered on the optical axis is formed in the back of the recess 1a. In general, the opening 1b formed in the base plate 1 in this way normally controls the exposure opening. However, in the case of the present embodiment, the diameter of the opening 1b is formed larger than the diameter of the exposure opening in order to prevent the photographing lens from colliding with the edge of the opening 1b in the assembly of the camera. The exposure opening is regulated by an opening 2a formed in the thin plate member 2 as described later. Therefore, the shape of the opening 1b is not necessarily circular as in the present embodiment. In FIG. 1, the opening 1b is not shown. However, as can be inferred from FIG. 2, the opening 1b has the same diameter as an opening 4e of the cover plate 4 described later.

  As shown in FIG. 1, the base plate 1 of the present embodiment has a substantially quadrangular outer shape in plan view, and two upper and lower peripheral surfaces project upward and downward, respectively. Each engaging portion 1c, 1d, 1e, and 1f is formed, and an arc-shaped escape hole 1g is formed in the upper region on the left side. Further, in FIG. 1, a relatively shallow recess 1h having an open left side is formed on the surface side of the base plate 1 to provide a space for the blade chamber, and a blade mounting shaft 1i and two Two stopper shafts 1j and 1k are provided upright.

  A metal thin plate member 2 is disposed in the recess 1h. The planar shape of the thin plate member 2 is slightly smaller than the planar shape of the recess 1h, but has a similar shape, and the diameter of the opening 2a formed around the optical axis is the opening of the ground plate 1 Smaller than 1b. The thin plate member 2 has two holes 2b and 2c and an arc-shaped escape hole 2d. Among them, the hole 2b has a circular shape and is fitted to the blade mounting shaft 1i. The hole 2c is D-shaped and is fitted to the stopper shaft 1k. Further, the escape hole 2d has the same shape as the above-described escape hole 1g, and both are overlapped.

  The shutter device of this embodiment includes one shutter blade 3. In FIG. 1, the shutter blade 3 is disposed on the front side of the thin plate member 2 and is rotatably mounted on the blade mounting shaft 1i. The shutter blade 3 has a small long hole 3a near the blade mounting shaft 1i, and an arc-shaped escape hole 3b centered on the blade mounting shaft 1i is provided near the center in the length direction. Is formed.

  The cover plate 4 of the present embodiment is made of metal and has a substantially rectangular shape, and the bent hook portions 4a, 4b, 4c, and 4d formed on the upper side and the lower side in FIG. The engaging portions 1 c, 1 d, 1 e, and 1 f are hooked and attached to the base plate 1, and a blade chamber is formed between the thin plate member 2. The cover plate 4 also has an opening 4e formed around the optical axis. As described above, the diameter of the opening 4e is the same as the opening 1b of the base plate 1. Therefore, in the case of the present embodiment, since the opening 2a of the thin plate member 2 restricts the exposure opening, the thin plate member 2 is a so-called aperture restriction plate. However, the exposure opening may be regulated by making the diameter of the opening 4e of the cover plate 4 the smallest.

  The cover plate 4 has two holes 4f, 4g and an arc-shaped escape hole 4h. Three bent portions 4i, 4j, and 4k are formed at predetermined angular intervals around the optical axis in the vicinity of the opening 4e, and the two bent portions 4m are also formed at the upper and lower positions on the left side. , 4n are formed. Among them, the hole 4f has a circular shape of the same size as the hole 2b, and is formed so as to face the hole 2b. The tip of the blade mounting shaft 1i is inserted into the hole 4f. ing. The hole 4g is circular and is formed so as to face the D-shaped hole 2c, and the tip of the stopper shaft 1k is inserted therein. The arc-shaped escape hole 4h has the same shape as the escape holes 1g and 2d, and is formed to face the escape hole 2d. Further, the five bent portions 4 i, 4 j, 4 k, 4 m, and 4 n have the thin plate member 2 in close contact with the base plate 1 because the cover plate 4 is attached to the base plate 1. Among them, the bent portions 4i, 4j, and 4k are the protruding portions of the present invention, and only the bent portion 4j passes through the escape hole 3b of the shutter blade 3.

  An electromagnetic actuator is attached to the back side of the ground plane 1 in FIG. 1, that is, the lower side of the ground plane 1 in FIG. The electromagnetic actuator of the present embodiment is a known actuator described in, for example, Japanese Patent Application Laid-Open No. 2006-284801. However, since the configuration itself is not directly related to the present invention, in FIGS. 1 and 2b, This is not shown for the sake of complete understanding. However, a brief description will be given below. First, the permanent magnet rotor 5 is rotatably mounted on a rotor mounting shaft 1m erected on the main plate 1. The rotor 5 has a cylindrical main body portion 5a magnetized in two poles in the radial direction, an arm portion 5b projecting from the main body portion 5a in the radial direction, and formed at the tip of the arm portion 5b. The output pin 5c passes through the escape holes 1g and 2d, fits into the long hole 3a of the shutter blade 3 in the blade chamber, and the tip of the output pin 5c extends into the escape hole 4h. Inserting.

  On the other hand, the stator shown only in FIG. 2 includes a stator frame 6, a coil 7, and a yoke 8. First, the synthetic resin stator frame 6 is integrally formed with a hollow bobbin portion 6a, and a coil 7 is wound around the bobbin portion 6a. Further, the yoke 8 is substantially U-shaped although not clearly shown, and one leg portion is passed through the hollow portion of the bobbin portion 6a, and the tip end portions of the two leg portions are used as magnetic pole portions. It is made to oppose the surrounding surface of the main-body part 5a. The stator frame 6 is attached to the main plate 1 by appropriate means, and also serves to prevent the rotor 5 from coming off.

  Next, the operation of this embodiment will be described. FIG. 1 shows a shooting standby state. At this time, the power switch of the camera is on, but the coil 7 is not energized. However, at this time, as is well known, the rotor 5 is given a force that rotates in the clockwise direction in FIG. 1 due to the magnetic attractive force acting between the magnetic pole part of the yoke 8. Since the shutter blade 3 is in contact with the stopper shaft 1j, this state is reliably maintained. Therefore, the solid-state image sensor is exposed to subject light, and the subject image can be observed on a monitor.

  When the release button is pressed during shooting, the charge accumulated in the solid-state imaging device is released, and shooting starts when new charge accumulation starts. Thereafter, when a predetermined time elapses, a current in the positive direction is supplied to the coil 7 by a signal from the exposure control circuit. Thereby, the rotor 5 is rotated counterclockwise, and the shutter blade 3 is rotated counterclockwise by the output pin 5c. At this time, the bent portion 4j of the cover plate 4 exists in the escape hole 3b of the shutter blade 3, so that the operation of the shutter blade 3 is not hindered. And the shutter blade | wing 3 will contact | abut to the stopper shaft 1k, and will stop immediately after closing the opening part 2a. When the operation of the shutter blade 3 stops, the imaging information is transferred to the storage device in that state. FIG. 3 shows a state immediately after the end of photographing performed as described above.

  When shooting is completed in this way, a current is supplied to the coil 7 in the reverse direction. Therefore, the rotor 5 is rotated clockwise in FIG. 3, and the shutter blade 3 is rotated clockwise by the output pin 5c. Thereafter, when the opening 2a is fully opened, the shutter blade 3 comes into contact with the stopper shaft 1j and stops immediately thereafter. When the power supply to the coil 7 is cut off, the photographing standby state shown in FIG. 1 is restored.

The above operation has been described in the case where the shutter device of this embodiment is adopted in a digital camera. However, as is well known, when the shutter device is adopted in a film camera, the state shown in FIG. In the photographing standby state, the end of the reciprocating rotation of the shutter blade 3 is the end of photographing. In this embodiment, the shutter device is provided with a single shutter blade 3, but if the shutter blade 3 is formed with an opening smaller than the opening 2b, it becomes a diaphragm blade. Becomes an aperture device. Further, if an ND filter plate is attached to such a diaphragm blade and the small opening is covered, it becomes a filter blade. In such a configuration, a filter device is obtained. In the case of a filter device, an opening larger than the opening 2b may be formed in the filter blade, or the filter blade in Example 5 described below may be employed. Accordingly, the iris and the filter apparatus configured as they are also camera blade roots driving device of the present invention.

  Next, Example 2 will be described with reference to FIGS. The blade driving device of the present embodiment is configured as a shutter device in the same manner as in the first embodiment. FIG. 4 is a plan view showing a shooting standby state, and FIG. FIG. 6 is a cross-sectional view for explaining the overlapping relationship, and FIG. 6 is a plan view showing a state immediately after the end of photographing. The configuration of the shutter device of the present embodiment is almost the same as that of the shutter device of the first embodiment. Therefore, in FIGS. 4 to 6, substantially the same members and parts as those in the first embodiment are denoted by the same reference numerals, and only the configuration different from that in the first embodiment will be described.

  The configuration of this embodiment is different from the configuration of Embodiment 1 only in the shape of a part of the shutter blade 3 and the shape of a part of the cover plate 4. First, in the shutter blade 3 of the present embodiment, the width of the arc-shaped escape hole 3b is larger than that of the first embodiment. On the other hand, in Example 1, the three bent portions 4i, 4j, and 4k formed at predetermined angular intervals in the vicinity of the opening 4e of the cover plate 4 were the protruding portions of the present invention. In the case of the present embodiment, the protruding portions of the present invention are formed as protruding portions 4p, 4q, 4r protruding in a spherical shape toward the thin plate member 2.

  Since the operation of this embodiment is exactly the same as that of Embodiment 1, the state immediately after the end of photographing is shown in FIG. Also in the case of the present embodiment, as described in the description of the first embodiment, the shutter blade 3 can be replaced with a diaphragm blade or a filter blade, whereby a diaphragm device or a filter device can be obtained. . Furthermore, in the case of the present embodiment, the protruding portions 4p, 4q, 4r are formed as the protruding portions of the present invention, but in the following embodiments, the folding portions formed as the protruding portions of the present invention are formed. The curved portion may have such a shape.

  Next, Embodiment 3 will be described with reference to FIGS. 7 to 9. FIG. 7 is a plan view showing a shooting standby state, and FIG. 8 is a cross-sectional view for explaining the overlapping relationship of the constituent members. FIG. 9 is a plan view showing a state immediately after the photographing is finished. The blade driving device of the present embodiment is configured by configuring the shutter device and the aperture device as one unit, but the configuration as the shutter device is substantially the same as in the case of the first embodiment. Therefore, in FIGS. 7 to 9, the same reference numerals are given to substantially the same members and parts as in the first embodiment, and only the configuration different from the first embodiment will be described.

  The base plate 1 of the present embodiment is slightly larger than that of the first embodiment. In addition to the same blade mounting shaft 1i as in the first embodiment, the ground plate 1 is provided with another blade mounting shaft 1n in the lower right region of FIG. In addition to the arc-shaped escape hole 1g as in the first embodiment, an arc-shaped escape hole 1p is formed in the vicinity of the blade mounting shaft 1n. In addition, the stopper shaft 1k in the first embodiment is not erected on the stopper shaft, and three stopper shafts 1q, 1r, and 1s are erected in addition to the same stopper shaft 1j as in the first embodiment. The thin plate member 2 of the present embodiment is formed so as to overlap with the escape hole 1p and the hole 2e into which the blade mounting shaft 1n is fitted, in addition to the same hole 2b and escape hole 2d as in the first embodiment. An arc-shaped escape hole 2f is provided. Further, the thin plate member 2 of the present embodiment is not provided with the hole 2c in the first embodiment, but instead is formed with a D-shaped hole 2g, into which the stopper shaft 1s is fitted. ing. The outer shape of the thin plate member 2 is formed so as to escape the stopper shafts 1q and 1r.

  The shutter blade 3 of this embodiment has substantially the same shape as that of the first embodiment, although the shape is slightly different. In the case of the present embodiment, the diaphragm blades 9 are arranged in the same blade chamber so as to be closer to the cover plate 4 than the shutter blades 3. The aperture blade 9 has a long hole 9a, an opening 9b having a smaller diameter than the opening 2a, and an arc-shaped escape hole 9c, and is rotatably attached to the blade attachment shaft 1n. .

  The cover plate 4 of the present embodiment has the same shape as the hole 4f and the escape hole 4h as in the first embodiment, the hole 4s into which the blade mounting shaft 1n is fitted, and the escape hole 2f. And an arcuate escape hole 4t formed in the shape. Further, the cover plate 4 of the present embodiment does not have the holes 4g in the first embodiment, but instead has holes 4u and 4v, in which the stopper shafts 1r and 1s are fitted. Yes. Furthermore, the cover plate 4 of the present embodiment does not have the bent portion 4k in the first embodiment, and the projecting portion of the present invention includes the same bent portions 4i and 4j as in the first embodiment. The bent portions 4 w and 4 x are provided, and the bent portion 4 w is passed through the escape hole 9 c of the aperture blade 9.

  In this embodiment, in addition to the electromagnetic actuator provided in the first embodiment, another electromagnetic actuator for driving the diaphragm blade 9 is provided. Since the configuration of the electromagnetic actuator is the same as that of the electromagnetic actuator for driving the shutter blade 3, it will be briefly described with reference to FIG. The permanent magnet rotor 10 includes a cylindrical main body portion 10a, an arm portion 10b, and an output pin 10c, and is rotatably attached to a rotor mounting shaft 1t provided upright on the base plate 1. . The output pin 10c passes through the escape holes 1p and 2f, fits into the long hole 9a of the diaphragm blade 9 in the blade chamber, and the tip thereof is inserted into the escape hole 4t. On the other hand, the stator includes a stator frame 11, a coil 12, and a yoke 13, and the coil 12 is wound around a bobbin portion 11 a of the stator frame 11. The yoke 13 having a substantially U-shape is opposed to the peripheral surface of the main body portion 10a of the rotor 10 with one leg portion penetrating the hollow portion of the bobbin portion 11a and the tip portions of the two leg portions as magnetic pole portions. I am letting. The stator frame 11 attached to the main plate 1 by appropriate means also serves to prevent the rotor 10 from coming off.

    Next, the operation of this embodiment will be described. FIG. 7 shows a shooting standby state. At this time, the power switch of the camera is on, but the coils 7 and 12 are not energized. However, at this time, as described in the first embodiment, the rotors 5 and 10 are given a force that rotates clockwise in FIG. 7, but the shutter blade 3 comes into contact with the stopper shaft 1j. Since the diaphragm blade 9 is in contact with the stopper shaft 1q, this state is reliably maintained. Therefore, the solid-state image sensor is exposed to subject light, and the subject image can be observed on a monitor.

  When the release button is pressed at the time of shooting, it is determined depending on the measurement result of the photometry circuit whether shooting is performed with the shooting light amount reduced or not. When it is determined that the photographing light quantity should be reduced, first, a positive current is supplied to the coil 12. Thereby, the rotor 10 is rotated counterclockwise. Therefore, the aperture blade 9 is rotated clockwise by the output pin 10c. At this time, the bent portion 4w of the cover plate 4 is present in the escape hole 9c of the diaphragm blade 9, so that the operation of the diaphragm blade 9 is not hindered. When the center of the opening 9b reaches the optical axis position, the diaphragm blade 9 is brought into contact with the stopper shaft 1s and stopped.

  Immediately after the operation of the aperture blade 9 is stopped, the charge accumulated in the solid-state image sensor is released, and imaging starts when new charge accumulation starts. Thereafter, when a predetermined time elapses, a positive current is supplied to the coil 7 by a signal from the exposure control circuit, so that the rotor 5 is rotated counterclockwise, and the shutter blade 3 is counteracted by the output pin 5c. Rotate clockwise. At this time, the bent portion 4j of the cover plate 4 exists in the escape hole 3b of the shutter blade 3, so that the operation of the shutter blade 3 is not hindered. And the shutter blade | wing 3 will contact | abut to the stopper axis | shaft 1r and will stop immediately after closing the opening part 2a. When the operation of the shutter blade 3 stops, the imaging information is transferred to the storage device in that state. FIG. 9 shows a state immediately after the end of photographing performed as described above.

  When shooting is completed in this way, current is supplied to the coils 7 and 12 in the opposite direction. Therefore, in FIG. 9, the rotor 5 is rotated clockwise, the shutter blade 3 is rotated clockwise by the output pin 5c, and the rotor 10 is rotated clockwise, and the diaphragm blade is rotated by the output pin 10c. 9 is rotated counterclockwise. Thereafter, when the opening 2a is fully opened, the shutter blade 3 comes into contact with the stopper shaft 1j and stops immediately thereafter, and when the shutter blade 9 retracts from the opening 2a, it immediately contacts the stopper shaft 1q. Stop. When the energization of the coils 7 and 12 is cut off, the imaging standby state shown in FIG. 7 is restored.

  On the other hand, when the release button is pressed during shooting, if it is determined from the measurement result of the photometry circuit that shooting should be performed without reducing the amount of shooting light, only the shutter blade 3 is operated in the above description of operation. is there. That is, this is the same as the operation description of the first embodiment. Therefore, the description of the operation at that time is omitted. When the camera blade driving device of this embodiment is employed in a film camera, as is well known, the shutter blade 3 is in the state shown in FIG. 9, and the aperture blade 9 is shown in FIG. When the camera is in a shooting standby state, the diaphragm blade 9 is first brought to the state shown in FIG. 7 and then the shutter blade 3 is moved to the state shown in FIG. Then, after returning to the state shown in FIG. 9, the diaphragm blade 9 is returned to the state shown in FIG.

As described above, the present embodiment is a camera blade driving device including one shutter blade 3 and one diaphragm blade 9, and the aperture blade 9 is covered with an ND filter plate. If it is set as the filter blade made like this, it will become a blade drive device for cameras provided with one shutter blade 3 and one filter blade. And when setting it as such an apparatus, you may make it form the opening part larger than the opening part 2b in a filter blade | wing. Thus, apparatus configured as they are also a camera for blade roots driving device of the present invention, this is also true for Example 4 below.

  Next, Embodiment 4 will be described with reference to FIGS. 10 to 12. FIG. 10 is a plan view showing a photographing standby state, and FIG. 11 is a cross-sectional view for explaining the overlapping relationship of the constituent members. FIG. 12 is a plan view showing a state immediately after the end of shooting. The camera blade driving device of the present embodiment is configured such that the shutter device and the aperture device are configured as one unit as in the third embodiment, but in the present embodiment, the thin plate member 2 and By partitioning the cover plate 4 with the intermediate plate 14, the blade chamber of the shutter blade 3 is configured between the thin plate member 2 and the intermediate plate 14, and the blade chamber of the diaphragm blade 9 is interposed between the intermediate plate 14 and the cover plate 4. Is configured. Therefore, in FIGS. 10 to 12, substantially the same members and parts as those in the third embodiment are denoted by the same reference numerals, and only the configuration different from the third embodiment will be described.

  In the base plate 1 of the present embodiment, a deeper recess 1h is formed than in the case of the third embodiment because of the arrangement of the intermediate plate 14. And in the recessed part 1h, in order to receive the intermediate | middle board 14 and to obtain the space of a blade chamber between the thin plate members 2, the three receiving parts 1u, 1v, and 1w are provided. . Among them, the receiving portion 1u is formed in a substantially rectangular shape corresponding to the bent portion 4m of the cover plate 4. Further, the receiving portion 1v is formed in a substantially D shape at a location corresponding to the bent portion 4i of the cover plate 4. Further, the receiving portion 1 w is formed in a circular shape at a location corresponding to the bent portion 4 w of the cover plate 4. The thin plate member 2 of this embodiment has a hole 2h for fitting the receiving portion 1w, and the outer shape is formed so as to escape the receiving portions 1u and 1v. To get.

  The shutter blade 3 of this embodiment has the same shape as that of the third embodiment. Further, the intermediate plate 14 that is in contact with the receiving portions 1u, 1v, and 1w and whose distance from the base plate 1 is regulated has a shape similar to that of the thin plate member 2, and is formed around the optical axis. The diameter of the opening 14 a is the same as the diameter of the opening 2 a of the thin plate member 2. Therefore, in the case of the present embodiment, both of the openings 2a and 14a regulate the exposure opening, but it does not matter even if only one of them is restricted. In the intermediate plate 14, holes 14b, 14c, 14d and escape holes 14e, 14f having the same shape are formed at positions opposite to the holes 2b, 2e, 2g and the relief holes 2d, 2f of the thin plate member 2, respectively. And a hole 14g for penetrating the bent portion 4j of the cover plate 4 is formed. The outer shape of the intermediate plate 14 is formed so as to escape the stopper shafts 1j, 1q, 1r of the base plate 1 and the bent portions 4n, 4x of the cover plate 4.

The diaphragm blade 9 of this embodiment has the same shape as that of the third embodiment. Further, the cover plate 4 of the present embodiment also has the same planar shape as that of the embodiment 3, but the bent portions 4j, 4n, 4x are formed longer than the bent portions 4i, 4m, 4w. have been, bent portion 4j, 4n, 4x, as in example 3, with press in intimate thin plate member 2 to the base plate 1, the bent portion 4i, 4m, 4w is the main plate of the intermediate plate 14 Only one receiving portion 1v, 1u, 1w is pressed to maintain the distance between the two blade chambers. Other configurations of the present embodiment are the same as those of the third embodiment. The operation of the present embodiment is performed in exactly the same manner as in the third embodiment, so that the description thereof is omitted.

  Next, Embodiment 5 will be described with reference to FIGS. 13 to 15. FIG. 13 is a plan view showing a photographing standby state, and FIG. 14 is a cross-sectional view for explaining the overlapping relationship of the constituent members. FIG. 15 is a plan view showing a state immediately after the photographing is finished. The blade driving device of the present embodiment is configured by configuring the shutter device and the filter device as one unit. The difference from the configuration of the third embodiment is that the diaphragm blade 9 in the third embodiment is mainly used as a filter. Since the blade 15 is replaced, the same members and parts as those in the third embodiment are denoted by the same reference numerals in FIGS. 13 to 15, and only the configuration different from that in the third embodiment will be described.

  In the base plate 1 of the present embodiment, the stopper shaft 1s in the third embodiment is not erected, but instead, the stopper shaft 1x is erected. Therefore, the holes 2g and 4v are not formed in the thin plate member 2 and the cover plate 4. Instead, the cover plate 4 is formed with a hole 4y into which the tip of the stopper shaft 1x is inserted, and the thin plate member 2 has an outer shape that escapes the stopper shaft 1x. As can be seen from FIG. 14, the filter blade 15 of the present embodiment is configured by stacking three plate members. The filter blade 15 configured in this way is well known, and the plate member 15a sandwiched in the middle is an ND filter plate. Further, the plate members 15b and 15c on both sides are metal plate members, and in the case of this embodiment, the openings 15b-1 and 15c-1 having a diameter larger than that of the opening 2a are formed. The diameter may be smaller than that of the opening 2a. In addition, the filter blade 15 has a long hole 15A and an arc-shaped escape hole 15B like the diaphragm blade 9 of the third embodiment, and is rotatably attached to the blade attachment shaft 1n. . The output pin 10c of the rotor 10 is fitted in the long hole 15A, and the bent portion 4w of the cover plate 4 passes through the escape hole 15B. Since the operation of this embodiment is exactly the same as that of Embodiment 3, the state immediately after the end of photographing is shown in FIG.

  Finally, Example 6 will be described with reference to FIGS. 16 and 17. FIG. 16 is a plan view showing a shooting standby state, and FIG. 17 is a plan view showing a state immediately after the shooting is finished. . While the blade driving device of the first embodiment is a shutter device including one shutter blade 3, the blade driving device of the present embodiment is a shutter including two shutter blades 23 and 24. Device. For this reason, the configuration of the present embodiment is different only in the number of shutter blades, and is basically configured according to the first embodiment. However, since there is a difference in the arrangement position and shape of each member, the description will be made by changing the reference numerals from those in the first embodiment. However, since the configuration of the electromagnetic actuator itself is exactly the same as that of the first embodiment, the description of this embodiment does not use cross-sectional views, and the rotor 5 shown in FIGS. 16 and 17 rotates. The same reference numerals as those in FIGS. 1 and 2 are attached to the child mounting shaft 1m.

  First, the configuration of the present embodiment will be described. As described above, the configuration is basically very similar to the configuration of the first embodiment, so that it is possible to fully understand the description of the first embodiment. I will simplify the explanation. The base plate 21 is made of synthetic resin, and when incorporated in the camera, a photographing lens is disposed on the back side of FIGS. 16 and 17. Therefore, a large concave portion 21a is formed in a circular shape on the back side of the base plate 21, and an opening portion 21b having the same diameter as an opening portion 25e of a cover plate 25 described later is formed around the optical axis. . Moreover, although the planar shape of the ground plane 21 of a present Example differs from the shape of the ground plane 1 of Example 1, two engaging parts 21c, 21d, and 2 each are provided in the upper peripheral surface and the lower peripheral surface, respectively. 21e and 21f are formed, and an arc-shaped escape hole 21g is formed in the upper left region. Further, in FIG. 1, a recess 21h is formed in almost the region on the surface side of the main plate 1, and two blade mounting shafts 21i, 21j and four stopper shafts 21k, 21m, 21n, 21p is erected.

  An opening 22a is formed around the optical axis in the metal thin plate member 22 disposed in the recess 21h, and the diameter thereof is smaller than that of the opening 21b of the base plate 21, thereby restricting the exposure opening. It is like that. The thin plate member 22 has four holes 22b, 22c, 22d, and 22e and an arc-shaped escape hole 22f. Among them, the holes 22b and 22c are fitted to the blade attachment shafts 21i and 21j. The holes 22d and 22e are fitted to the stopper shafts 21n and 21p. Further, the escape hole 22f has the same shape as the escape hole 1g, and both are overlapped. The outer shape of the thin plate member 22 is formed so as to escape the stopper shafts 21k and 21m.

  The shutter device of the present embodiment includes two shutter blades 23 and 24 between the thin plate member 22 and the cover plate 25. Among them, the shutter blade 23 arranged on the thin plate member 22 side is rotatably attached to the blade attachment shaft 21i. On the other hand, the shutter blade 24 arranged on the cover plate 25 side is rotatably attached to the blade attachment shaft 21j. The shutter blades 23 and 24 have long holes 23a and 24a and arc-shaped escape holes 23b and 24b. The output pins 5c of the rotor 5 are fitted in both the long holes 23a and 24a. Match.

  The cover plate 25 of the present embodiment is attached to the ground plate 21 by hooking the four hook portions 25a, 25b, 25c, and 25d that are bent over the engaging portions 21c, 21d, 21e, and 21f. A blade chamber is formed between the thin plate member 22 and the blade member 22. The cover plate 25 has an opening 25e formed around the optical axis, but the diameter is smaller than the opening 22a of the thin plate member 22.

  The cover plate 25 has four holes 25f, 26g, 25h, and 25i and an arc-shaped escape hole 25j, and a position near the opening 25e is centered on the optical axis. Two bent portions 25k and 25m are formed at a predetermined angular interval, and bent portions 25n and 25p are also formed at an upper position and a left position. Of these, the holes 25f and 25g are formed to face the holes 22b and 22c, and the tips of the blade mounting shafts 21i and 21j are inserted into them. The holes 25h and 25i are formed so as to face the holes 22d and 22e, and the tip ends of the stopper shafts 21n and 21p are inserted into them. The escape hole 25j is formed to face the escape hole 22f, and the tip of the output pin 5c of the rotor 5 is inserted therein. Furthermore, all of the four bent portions 25k, 25m, 25n, and 25p bring the thin plate member 22 into close contact with the main plate 21.

  Next, the operation of this embodiment will be described. FIG. 16 shows a shooting standby state. At this time, the power switch of the camera is on, but the coil 7 is not energized. However, a force that rotates counterclockwise is applied to the rotor 5, and this state is reliably maintained by the shutter blades 23 and 24 being pressed against the stopper shafts 21k and 21m. When the release button is pressed during shooting, the charge accumulated in the solid-state imaging device is released, and shooting starts when new charge accumulation starts. Thereafter, when a predetermined time elapses, a current in the reverse direction is supplied to the coil 7, so that the rotor 5 is rotated in the clockwise direction, and the shutter blade 23 is rotated in the clockwise direction by the output pin 5c. Rotate clockwise. At this time, the bent portion 25k of the cover plate 25 is present in the escape holes 23b, 24 of the shutter blades 23, 24, so that the operation of the shutter blades 23, 24 is not hindered.

  Then, the shutter blades 23 and 24 come into contact with the stopper shafts 21n and 21p and stop immediately after the opening 22a is closed. When the operation of the shutter blades 23 and 24 stops, the imaging information is transferred to the storage device in that state. FIG. 17 shows a state immediately after the end of photographing performed as described above. When photographing is completed in this way, a current is supplied to the coil 7 in the positive direction. Accordingly, the rotor 5 is rotated counterclockwise in FIG. 17, and the shutter blade 23 is rotated counterclockwise by the output pin 5c, and the shutter blade 24 is rotated clockwise. Thereafter, when the opening 2a is fully opened, the shutter blades 23 and 24 come into contact with the stopper shafts 21k and 21m and stop immediately thereafter. When the power supply to the coil 7 is cut off, the camera is returned to the photographing standby state shown in FIG.

  The above operation has been described in the case where the shutter device of the present embodiment is adopted in a digital camera. However, when it is adopted in a film camera, the state shown in FIG. The camera enters standby mode. In the third to fifth embodiments, the shutter device can be replaced with the shutter device of the present embodiment. Therefore, what is configured as such is also the camera blade driving device of the present invention.

It is the top view of Example 1 which showed the imaging | photography standby state. It is sectional drawing of Example 1 for demonstrating the overlapping relationship of a structural member. It is the top view of Example 1 which showed the state immediately after completion | finish of imaging | photography. It is the top view of Example 2 which showed the imaging | photography standby state. It is sectional drawing of Example 2 for demonstrating the overlapping relationship of a structural member. It is the top view of Example 2 which showed the state immediately after completion | finish of imaging | photography. It is the top view of Example 3 which showed the imaging | photography standby state. It is sectional drawing of Example 3 for demonstrating the overlapping relationship of a structural member. It is the top view of Example 3 which showed the state immediately after completion | finish of imaging | photography. It is the top view of Example 4 which showed the imaging | photography standby state. It is sectional drawing of Example 4 for demonstrating the overlapping relationship of a structural member. It is the top view of Example 4 which showed the state immediately after completion | finish of imaging | photography. It is the top view of Example 5 which showed the imaging | photography standby state. It is sectional drawing of Example 5 for demonstrating the overlapping relationship of a structural member. It is the top view of Example 5 which showed the state immediately after completion | finish of imaging | photography. It is the top view of Example 6 which showed the imaging | photography standby state. It is a top view of Example 6 which showed the state immediately after completion | finish of imaging | photography.

Explanation of symbols

1,21 Ground plate 1a, 1h, 21a, 21h Recessed part 1b, 2a, 4e, 9b, 14a, 15b-1, 15c-1, 21b, 22a, 25e Opening part 1c-1f, 21c-21f Engagement part 1g, 1p , 2d, 2f, 3b, 4h, 4t, 9c, 14e, 14f, 15B, 21g, 22f, 23b, 24b, 25j Relief holes 1i, 1n, 21i, 21j Blade mounting shafts 1j, 1k, 1q-1s, 1x, 21k, 21m, 21n, 21p Stopper shaft 1m, 1t Rotor mounting shaft 1u-1w Receiving part 2,22 Thin plate member 2b, 2c, 2e, 2g, 2h, 4f, 4g, 4s, 4u, 4v, 4y, 14b 14d, 14g, 22b-22e, 25f-25i Holes 3, 23, 24 Shutter blades 3a, 9a, 15A23a, 24a Long holes 4,25 Cover plates 4a-4d Parts 4i-4k, 4m, 4n, 4w, 4x, 25k, 25m, 25n, 25p Bent part 9, 10 Rotor 5a, 19a Body part 5b, 10b Arm part 5c, 10c Output pin 6, 11 Stator frame 6a , 11a Bobbin portion 7, 12 Coil 8, 13 Yoke 9 Diaphragm blade 14 Intermediate plate 15 Filter blade 15a, 15b, 15c Plate member

Claims (8)

A synthetic resin ground plate having an opening formed around the optical axis, and an opening formed smaller than the opening of the ground plate around the optical axis. The thin plate member is formed between the base plate and an opening portion that is formed around the optical plate and at least one of the thin plate member and restricts the exposure opening. it is caused to rotatably mounted by and reciprocally rotate relative to the base plate and the cover plate constituting the blade chamber, before Symbol vane chamber between the mounting et been pre Symbol sheet member to the base plate across the And at least one blade that is advanced and retracted to and from the exposure opening, and the cover plate is formed with at least one protrusion toward the thin plate member at a position near the periphery of the opening of the cover plate. Been Te, a projecting shape portion when attached to the base plate and in contact with the thin plate members, the at least one blade, a feature that you have had a relief hole in which is passed through the ridge Camera blade drive device.   In the blade chamber, two blades that are simultaneously rotated in the opposite directions by the same drive source are rotatably attached to the main plate, and the escape hole is formed by both of the blades. The camera blade driving device according to claim 1, wherein the same projecting portion is passed through the escape holes.   The cover plate has at least two protrusions, and in the blade chamber, the cover plate is reciprocally rotated by a first drive source and a second drive source. The second blades are rotatably attached to the main plate, and the blades are respectively formed with the relief holes, and the relief holes are different from each other. The blade driving device for a camera according to claim 1, wherein   The thin plate member and the cover plate are partitioned by an intermediate plate to form two blade chambers, the first blade is disposed in one blade chamber, and the second blade is disposed in the other blade chamber. The intermediate plate is formed around the optical axis and restricts an exposure opening by at least one of the opening of each of the thin plate member and the cover plate, and the protruding portion. The camera blade drive device according to claim 3, further comprising at least one hole through which the camera blades penetrate.   The cover plate is provided with at least one projecting portion having substantially the same shape as the projecting portion toward the intermediate plate, and the projecting portion has the cover plate attached to the ground plate. The camera blade driving device according to claim 4, wherein the intermediate plate is pressed against the base plate.   The camera blade driving device according to claim 1, wherein the protruding portion has a bent shape from a plate surface of the cover plate.   The camera blade driving device according to claim 1, wherein the protruding portion has a shape protruding from a plate surface of the cover plate.   The cover plate has a plurality of hook portions that are bent and elastic at the periphery thereof, and the ground plate has a plurality of engagement portions at the periphery thereof, and the cover The camera blade driving device according to any one of claims 1 to 7, wherein the plate is attached to the base plate by hooking the hook portion to the engaging portion.

Images