JP2007272022A - Blade driving device for camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade driving device for a camera where two or more thin plate members are attached to a common mount shaft by heat caulking so that a blade chamber is constituted between them, and which is suitable for downsizing. <P>SOLUTION: The mount shaft 1f erected on a base board 1 made of synthetic resin by integral molding comprises a shaft part 1f-1 having large cross-sectional area and a shaft part 1f-2 having small cross-sectional area, and a level difference plane is formed on the shaft part 1f-1. An aperture regulating plate 2 that is the thin plate member has a hole in shape corresponding to the cross-sectional shape of the shaft part 1f-1, and attached by fitting the hole to the shaft part 1f-1 and then heating a part of the level difference plane formed portion of the shaft part 1f-1 so as to deform it in a flange state. Similarly, a cover plate 3 that is the thin plate member has a hole in shape corresponding to the cross-sectional shape of the shaft part 1f-2, and attached by fitting the hole to the shaft part 1f-2 and then heating the edge of the shaft part 1f-2 so as to deform it in a flange state, thereby constituting the blade chamber between the aperture regulating plate 2 and the cover plate 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a camera blade drive device in which blade members such as shutter blades, aperture blades, and filter blades are reciprocated in a blade chamber.

  As a blade drive device for a camera, there are a shutter device, a diaphragm device, a filter device, and a lens barrier device. Among them, the shutter device, the diaphragm device, and the filter device may be unitized independently. One or more may be configured as one unit. When these four devices are unitized independently, usually a base plate that is a relatively thick member made of synthetic resin and a cover plate (auxiliary base plate that is a relatively thin plate member attached to the base plate). The blade chamber is also formed between the two. In addition, when two devices are unitized, it is also known that the blades of the two devices are arranged in one blade chamber configured as described above. In general, an intermediate plate, which is a relatively thin plate member, is attached between the two blade chambers. Therefore, when three devices are unitized, another one intermediate plate may be attached to form three blade chambers.

  However, even if one blade chamber is configured as described above, the blade chamber is not configured between the base plate and the cover plate, a thin plate member is attached adjacent to the base plate, and the plate member and the cover plate There may be a blade chamber in between. And the example comprised in that way is described in the following patent document 1, but there are mainly two reasons why the main plate is not used as a member constituting the blade chamber. One of them is a case where it is necessary to arrange another member on the blade chamber side of the main plate as described in Patent Document 1. Another reason is that when the lens is placed close to the working surface of the blade and the aperture for the optical path of the image formed on the base plate is made larger than necessary, the blade operates stably. This is a case where a thin plate member is disposed on the blade chamber side of the main plate. Accordingly, in the case of such a configuration, the number of thin plate members is increased by one as compared with the case where the base plate is used as a constituent member of the blade chamber. And, when an opening for a photographing optical path having a smaller diameter than the ground plate or the cover plate is formed in a thin plate member constituting the blade chamber between such a cover plate, the plate member is Sometimes referred to as a diameter regulating plate.

  On the other hand, in the case of the recent blade driving device as described above, it is common to drive the blade by an electromagnetic actuator. As described in Patent Document 1, the electromagnetic actuator is usually an actuator configured between a ground plane and a stator frame (also referred to as a motor frame, a cover frame, etc.) attached to the ground plane. Placed in the room. Until now, as described above, whether a plurality of thin plate members constituting the blade chamber are attached to the main plate or a stator frame is attached to the main plate, as described in Patent Document 1, It was common to install with screws. However, screw parts are disadvantageous in terms of cost, and recently, each device as described above has been very miniaturized so that it can be incorporated into various information equipment terminals, etc. It is no longer easy.

  Therefore, recently, paying attention to the fact that the base plate is made of synthetic resin, the mounting shaft is erected on the base plate by integral molding, and the mounting shaft is passed through the hole provided in the cover plate and protrudes out of the blade chamber. It is known that the cover plate is attached by heat-dissolving the tip of the tip and deforming it into a bowl shape larger than the hole. Since this mounting technique is generally referred to as thermal caulking, it will be referred to as such in the following. However, when this thermal caulking is used, at least a screw part is not required, so that the cost is low. The installation work is also simplified. Therefore, using this thermal caulking, as described above, instead of simply attaching the cover plate to the base plate, the base plate is attached to the synthetic resin stator frame, or the camera blade drive is attached to the cover plate. The apparatus is described in Patent Document 2 below. The present invention relates to a blade driving device for a camera in which a component member of a blade chamber or a component member of a blade chamber and an actuator chamber is mounted using such a heat caulking technique.

JP 2005-91549 A JP 2005-241866 A

  By the way, as described above, when two or more thin plate members including the cover plate are attached to the base plate so that their relative positions are not changed, and at least one blade chamber is configured, Patent Document 1 also discloses. As described, it is necessary to prepare a member (spacer 6 and 7 in Patent Document 1) that becomes a spacer between at least thin plate members, which increases the cost. When mounting by caulking, the mounting shafts with different lengths were erected for each plate member with respect to the base plate, and the plate members were sequentially attached to these dedicated mounting shafts. .

  However, recent blade driving devices for cameras need to be applicable to extremely small single cameras and cameras for information terminal devices such as mobile phones. Although it is required, as described above, when the dedicated mounting shafts are erected, since the number of mounting shafts is large, the planar shape of the main plate cannot be reduced or it is difficult to obtain a desired shape. The problem came out. And, as described in Patent Document 2, this is because the base plate and at least one plate member (in the case of one, a cover) are attached to a dedicated mounting shaft erected on a synthetic resin stator frame by thermal caulking. The same applies to the case where an actuator chamber and at least one blade chamber are configured by attaching a plate.

  The present invention has been made to solve such problems. The object of the present invention is to synthesize two or more thin plate members including a cover plate on a base plate made of synthetic resin. When mounting at least one vane chamber with the relative spacing between the plate members unchanged, these thin plate members are mounted on a common mounting shaft that is erected integrally with the base plate. It is another object of the present invention to provide a camera blade drive device suitable for miniaturization, which can be securely fixed individually by thermal caulking. The mounting shaft is erected on a synthetic resin stator frame so that the base plate is also attached to the mounting shaft, and an actuator chamber is formed between the stator frames of the base plate. Another object is to provide a blade driving device for a camera.

  In order to achieve the above object, in the blade driving device for a camera of the present invention, at least one mounting shaft is erected on the surface on the blade chamber side by integral molding, and the mounting shaft extends from the surface on the blade chamber side. The cross-section of the shaft portion with the smaller cross-sectional area is between two adjacent shaft portions having at least two shaft portions in order of increasing cross-sectional area in the direction perpendicular to the axis of the mounting shaft. A base plate made of synthetic resin in which a step surface is formed on the shaft portion having a large cross-sectional area so as not to protrude from the cross section of the shaft portion having a large cross-sectional area, and holes each having a shape corresponding to the cross-sectional shape of the shaft portion. And at least two plate members fitting the holes to the shafts in order from the one having a large hole, and each plate member in order from the ground plate side, After fitting the hole to the shaft part, a part of the step surface forming part of the shaft part Although it is attached by being melted and deformed in a bowl shape, only the plate member in which the hole is fitted to the most distal shaft portion of the mounting shaft, the tip of the shaft portion is completely melted in a bowl shape. The blade chamber is formed between two adjacent plate members.

  In that case, among the plate members, the plate member attached closest to the surface on the blade chamber side of the base plate is from the surface on the blade chamber side of the base plate among the shaft portions formed on the mounting shaft. It may be attached to the second shaft portion, and a blade chamber may be formed between the plate member and the main plate. The mounting shaft is erected on a synthetic resin stator frame, and the base plate is formed with a hole corresponding to the cross-sectional shape of the shaft portion having the largest cross-sectional area of the mounting shaft. The stator frame is fitted with the shaft portion having the largest cross-sectional area in the hole of the base plate, and a part of the stepped surface forming portion of the shaft portion is thermally melted and deformed into a bowl shape. A ground plane may be attached and an actuator chamber may be formed between the ground plane.

  In the present invention, a plurality of plate members necessary for constituting a blade chamber are sequentially arranged at predetermined intervals by thermal caulking with respect to a common mounting shaft erected on a synthetic resin base plate by integral molding. Since it is possible to suitably configure one or a plurality of blade chambers, the number of attachment shafts is reduced as compared with the conventional one, and the apparatus can be downsized. In addition, by mounting such a mounting shaft on a synthetic resin stator frame and fitting it into a hole formed in the base plate, in addition to the plate member, the blade can be driven. It is possible to suitably configure an actuator chamber for this purpose.

  The embodiment of the present invention will be described with reference to two illustrated examples. The camera blade driving device of the present invention can be applied to any of a shutter device, a diaphragm device, a filter device, and a lens barrier device. Further, the present invention can also be applied to a device in which two or more of the shutter device, the diaphragm device, and the filter device are configured as one unit. Furthermore, these devices can be employed in cameras using silver salt films, and can also be employed in digital cameras including various information terminal equipment cameras and video cameras. However, since there is no need to describe all of these cases with specific examples, the first embodiment will be described in detail as a single unit of the shutter device. In order to make one device into one unit, the configuration of the main part when two blade chambers are configured will be described. 1 to 4 are for explaining the first embodiment, and FIGS. 5 to 11 are for explaining the second embodiment.

  This embodiment is configured as a shutter device having one shutter blade. The shutter device having this configuration can be used for a silver salt film camera. However, the shutter device is configured to be small and thin so that it can be particularly easily applied to a digital camera. In this case, the description will be made on the assumption that the digital camera is adopted. FIG. 1 is a plan view showing a photographing standby state in which the shutter blades are fully opened, FIG. 2 is a cross-sectional view of the main part, and FIG. 3 is an exploded perspective view.

  First, the configuration will be described. The base plate 1 of the present embodiment is made of synthetic resin and is formed relatively thick. In FIGS. 2 and 3, the upper surface is the blade chamber side surface and the lower surface is the actuator chamber side surface. Yes. An opening 1a for a circular photographing optical path is formed at a substantially central portion of the base plate 1, and an arc-shaped long hole 1b is formed at a side position thereof. In addition, five attachment shafts 1c, 1d, 1e, 1f, and 1g, two stopper shafts 1h and 1i, and one blade shaft 1j are erected on the surface of the base plate 1 on the blade chamber side by integral molding. The two mounting shafts 1k and 1m and the single rotating shaft 1n are erected on the surface on the actuator chamber side by integral molding. In FIG. 3, in order to make the mounting shafts 1k and 1m and the rotating shaft 1n easier to understand, the thick ground plate 1 is actually shown as being thin as shown in FIG. Further, in FIG. 2, in order to make the cross-sectional shape of the main part comprehensible with one drawing, it is unavoidable that the positions of the mounting shafts 1g and 1f are not appropriate in view of FIG. 1 and FIG. It is shown.

  Among them, the mounting shafts 1c, 1d, and 1e are composed of two parts having different diameters, but the large diameter part is provided on the blade chamber side surface of the base plate 1 and the blade chamber side of the cover plate 3 described later. It is a pedestal part for restricting the distance to the surface. Further, the mounting shaft 1f is formed on the tip side and a shaft portion 1f-1 in which the cross-sectional shape (cross-sectional shape cut at right angles to the axis of the axis) formed on the main plate 1 side is an oval shape. The shaft portion 1f-2 has a circular cross-sectional shape. The shaft portion 1f-2 having the smaller cross-sectional area is formed so that the cross-section of the shaft portion does not protrude from the cross-section of the shaft portion 1f-1 having the larger cross-sectional area. A step surface is formed at 1f-1. Further, the mounting shafts 1k and 1m have a circular cross-sectional shape, and the rotary shaft 1n is for rotatably mounting a rotor 5 described later. Yes.

  A diameter regulating plate 2 is attached to the base plate 1 adjacent to the blade chamber side surface. The reason why the aperture restriction plate 2 is attached is as follows. When the shutter device of the present embodiment is incorporated in the camera, the photographing lens disposed on the lower side of the base plate 1 in FIGS. 2 and 3 can be disposed as close as possible to the operating surface of the shutter blade 4 described later. I want to. For this purpose, it is necessary to make the opening 1a formed in the base plate 1 which is a relatively thick member unnecessarily large so that a part of the photographing lens enters the opening 1a. However, if the opening 1a is enlarged as described above, the operation of the shutter blade 4 in the blade chamber becomes unstable, and the photographic lens cannot be brought close to each other. Therefore, in the case of the present embodiment, as can be seen from FIG. 3, the aperture restriction plate 2 which is an extremely thin plate member is attached, and a blade chamber is formed between the aperture restriction plate 2 and a cover plate 3 which will be described later. I am doing so. However, as described above, for example, such a thin plate member may be attached in order to obtain a configuration as described in Patent Document 1, for example.

  The aperture restricting plate 2 is formed with an opening 2a for a photographing optical path whose diameter is smaller than that of the above-described opening 1a and restricts the exposure aperture at a substantially central portion. In addition to the arc-shaped long hole 2b, three circular holes 2c, 2d, 2e and two notches 2f, 2g are formed. Among them, although the opening 2a will be described later, the long hole 2b is formed in the same shape at a position overlapping with the long hole 1b. The holes 2c, 2d, and 2e include the stopper shaft 1i and the mounting shaft. 1g and the blade shaft 1j are fitted. Further, the notch portion 2f is mounted on a part of the stepped surface formed on the shaft portion 1f-1 of the mounting shaft 1f so that the notch portion 2g escapes the stopper shaft 1h. Is formed. The aperture restriction plate 2 is attached to the main plate 1 at two locations. As shown in FIGS. 1 and 2, in one of them, the tip of the mounting shaft 1g penetrating the hole 2d is deformed and attached in a circular bowl shape by thermal caulking, and in the other place, A part of the stepped surface forming portion of the shaft portion 1f-1 is attached by being deformed into a semicircular bowl shape by heat caulking. In FIG. 2, the reference numerals of the holes 2d and 2e and the notch 2f are omitted.

  A cover plate 3, which is a thin plate member, is attached to the base plate 1 at a predetermined interval from the aperture restriction plate 2, and a blade chamber is formed between the base plate 1 and the aperture restriction plate 2. As can be seen from FIG. 3, the cover plate 3 is formed with an opening 3a for a photographing optical path having a circular shape at a substantially central portion, and an arc-shaped long hole 3b is formed at a side position thereof. Seven holes 3c, 3d, 3e, 3f, 3g, 3h and 3i are formed. Among them, the opening 3a is formed so as to overlap the openings 1a and 2a of the base plate 1 and the aperture regulating plate 2, and the diameter is smaller than the opening 1a but larger than the opening 2a. Therefore, in the case of the present embodiment, since the exposure opening is restricted by the opening 2a of the aperture restricting plate 2, the thin plate member denoted by reference numeral 2 is referred to as an aperture restricting plate. However, in this embodiment, the diameter of the opening 3a of the cover plate 3 may be made the smallest and the exposure opening may be regulated by the opening 3a. In the configuration described in Patent Document 1, the exposure opening is regulated by the opening formed in the cover plate. Therefore, in such a configuration, the thin plate member corresponding to the aperture restriction plate 2 of the present embodiment cannot be called an aperture restriction plate.

  The long hole 3b of the cover plate 3 is formed in substantially the same shape at a position overlapping the long holes 1b and 2b, and the mounting shafts 1c, 1d and 1e are formed in the holes 3c, 3d and 3e. Is fitted, the shaft portion 1f-2 of the mounting shaft 1f is fitted in the hole 3f, the stopper shafts 1i and 1h are fitted in the holes 3g and 3h, and the hole 3i is fitted in the hole 3i. The blade shaft 1j is fitted. And this cover board 3 is attached by deform | transforming the front-end | tip of the attachment shaft 1c, 1d, 1e, and 1f which penetrated the holes 3c, 3d, 3e, and 3f into the circular hook shape by heat caulking. In FIG. 2, the holes 3c into which the mounting shaft 1c is fitted and the holes 3f into which the shaft portion 1f-2 of the mounting shaft 1f is fitted are not labeled.

  As described above, one shutter blade 4 is arranged in the blade chamber formed between the aperture regulating plate 2 and the cover plate 3. The shutter blade 4 is formed with a circular hole 4a and a long hole 4b, and the hole 4a is fitted to the blade shaft 1j. In FIG. 2, the holes 4a and the long holes 4b are not labeled. In the case of the present embodiment, only one shutter blade 4 is arranged in the blade chamber as described above. However, the present invention arranges a plurality of shutter blades, and they are simultaneously the same. You may make it reciprocate at a different speed in the direction. Further, as is well known, two shutter blades may be disposed and simultaneously rotated in opposite directions. In that case, at least one shutter blade may be a plurality of shutter blades, and the plurality of shutter blades may be simultaneously rotated in the same direction at different speeds.

  Here, a description will be given of the mounting configuration of the aperture regulating plate 2 and the cover plate 3 with respect to the mounting shaft 1f. As described above, in the present embodiment, the aperture restriction plate 2 is attached to the attachment shaft 1g and the shaft portion 1f-1 of the attachment shaft 1f. Accordingly, it is assumed that the diameter restricting plate 2 is not attached to the shaft portion 1f-1 of the attachment shaft 1f, but a dedicated attachment shaft is erected in the vicinity of the attachment shaft 1f, as in the case of the attachment shaft 1g. Try it. In this case, as a matter of course, the cross-sectional shape of the mounting shaft 1f is all the cross-sectional shape of the shaft portion 1f-2.

  By the way, when the diameter restricting plate 2 is caulked with heat to the dedicated mounting shaft in this way, the tip of the mounting shaft has the same size as the tip of the mounting shaft 1g (see FIGS. 1 and 4). Will be deformed. Therefore, when heat caulking, it is necessary to prevent the heating device to be deformed into such a shape from coming into contact with the mounting shaft 1f. Therefore, at least in a position where the formed hook-shaped portion does not touch the mounting shaft 1f. Therefore, it is necessary to erect the dedicated mounting shaft at a position where it is easy to work. Moreover, since the hook-shaped portion is formed in the blade chamber, it is necessary to erect a dedicated mounting shaft at a position where the hook-shaped portion does not affect the operation of the shutter blade 4. As can be seen from FIG. 4 after considering them, there is no room for the dedicated mounting shaft of the aperture regulating plate 2 to stand in the vicinity of the mounting shaft 1f. In other words, in this embodiment, the mounting shaft 1f composed of the two shaft portions 1f-1 and 1f-2 as described above is erected, so that the preferred shape of the main plate 1 and the downsizing and compacting of the apparatus are achieved. Is obtained.

  As described above, the rotary shaft 1n is erected on the surface of the base plate 1 on the actuator chamber side, and the rotor 5 is rotatably attached to the rotary shaft 1n. The rotor 5 has a cylindrical permanent magnet 5a magnetized in two poles in the radial direction. The rotor 5 is integrally formed with the permanent magnet 5a, and is a synthetic resin arm 5b protruding in the radial direction. An output pin 5c is provided at the tip of the. The output pin 5 c is inserted into the blade chamber from the long holes 1 b and 2 b of the base plate 1 and the aperture restriction plate 2, fitted into the long hole 4 b of the shutter blade 4, and the tip thereof is the long hole of the cover plate 3. Projecting out of the blade chamber from 3b. In FIGS. 1 and 4, the boundary between the magnetic poles of the permanent magnet 5a is indicated by a single dot-and-dash line passing through the shaft 1n for convenience. Moreover, although the rotor 5 of a present Example has such a structure, it is also known that the arm 5b and the output pin 5c are made of permanent magnets.

  A synthetic resin stator frame 6 is attached to the mounting shafts 1k and 1m provided upright on the surface of the base plate 1 on the actuator chamber side. As clearly shown in FIG. 3, the stator frame 6 has a hollow bobbin portion 6 a formed at a substantially central portion in the length direction, and a coil 7 is wound around the outside thereof. Two holes 6b and 6c are formed on both sides of the bobbin portion 6a. A recess for receiving a part of the permanent magnet 5a of the rotor 5 is formed between the bobbin portion 6a and the hole 6c, and the tip of the rotary shaft 1n is received at the center of the recess. A non-penetrating hole is formed. Further, the yoke 8 having a U-shape and having two leg portions is inserted into one of the hollow portions of the bobbin portion 6a, and the tip ends of the two leg portions are used as magnetic pole portions. And as FIG. 4 shows, it is made to oppose the surrounding surface of the permanent magnet 5a.

  In this way, the stator frame 6 in which the coil 7 is wound around the outside of the bobbin portion 6a and one leg portion of the yoke 8 is inserted into the hollow portion of the bobbin portion 6a has its holes 6b and 6c attached as described above. After the shafts 1k and 1m are fitted, the tips of the mounting shafts 1k and 1m are attached by deforming them into a circular bowl shape by heat caulking. In the actuator configured as described above, the rotor 5 rotates in a direction corresponding to the energization direction with respect to the coil 7 only within a predetermined angle range. In the case of the present embodiment, the bobbin portion 6a is integrally formed with the stator frame 6, but this type of actuator is also known in which they are configured as separate members. Other configurations including a rotor are also known. Therefore, the present invention is not limited by the configuration of these actuators.

  Next, the operation of this embodiment will be described with reference to FIGS. FIG. 1 shows a photographing standby state, in which the shutter blade 4 fully opens the opening 2a that regulates the exposure opening. 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 coil 7 of the actuator is not energized. However, as is well known, at this time, the rotor 5 is rotated counterclockwise by the magnetic force due to the opposing arrangement relationship between the magnetic pole of the permanent magnet 5a and the two magnetic pole portions of the yoke 8, and is output by the output pin 5c. Since the shutter blade 4 is biased to rotate clockwise, the shutter blade 4 is pressed against the stopper shaft 1h, and this state is reliably maintained.

  When the release button is pressed at the time of shooting, the charge stored in the solid-state image sensor is released, and shooting starts, and new charges are stored in the solid-state image sensor. When a predetermined time elapses, a forward current is supplied to the coil 7 by a signal from the exposure time control circuit. Thereby, the rotor 5 is rotated in the clockwise direction, so that the shutter blade 4 is rotated in the counterclockwise direction by the output pin 5c to close the opening 2a. At this time, the shutter blade comes into contact with the stopper shaft 1i and stops. However, if the aperture restriction plate 2 is not provided, the shutter blade 4 bends when it comes into contact with the stopper shaft 1i, and the opening 1a. However, in the present embodiment, since the aperture restriction plate 2 is provided, such a situation does not occur. FIG. 4 shows the state in which the shutter blades 4 are stopped in this way.

  In the state shown in FIG. 4, the charge accumulated in the solid-state image sensor 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 7 unlike the above. Thereby, the rotor 5 is rotated counterclockwise, and the shutter blade 4 is rotated clockwise by the output pin 5c. At this time, in the case where there is no aperture regulating plate 2, if the shutter blade 4 is tilted or bent even slightly, an intermediate portion in the length direction may hit the edge of the opening 1a. In such a case, since the aperture regulating plate 2 is provided, this does not occur. When the opening 2a is fully opened, the shutter blade 4 comes into contact with the stopper shaft 1h and stops. Thereafter, when the power supply to the coil 7 is cut off, the state shown in FIG. 1 is restored.

  Although this embodiment has been described as a shutter device, it can be a lens barrier device with the configuration as it is. In addition, when a filter blade made only of a filter plate is provided instead of the shutter blade, a filter device is obtained. Further, if an aperture smaller than the aperture 2a is formed on the shutter blade of the present embodiment to form an aperture blade, the aperture device can be obtained. Furthermore, if an opening having an appropriate size is formed in the shutter blade of this embodiment and a filter plate is attached so as to cover the opening, a filter device is obtained. All of these devices are the camera blade driving device of the present invention.

  The mounting shaft 1g of this embodiment is a dedicated mounting shaft for the aperture restriction plate 2. The mounting shaft 1g is composed of two shaft portions similar to the mounting shaft 1f, and the cover plate 3 is also mounted. By doing so, it is not necessary to stand the mounting shaft 1d on the base plate 1, and the base plate 1 can be further reduced in size. Therefore, in the present invention, a plurality of mounting shafts similar to the mounting shaft 1 f may be provided on the base plate 1. Further, in this embodiment, one blade chamber is configured with two portions of the shaft portion 1f-1 and the shaft portion 1f-2 of the mounting shaft 1f as heat caulking portions. In some cases, it is possible to form two blade chambers by providing a heat caulking portion. That is, in the case of the present embodiment, for the reason described above, in order to enlarge the opening 1a, the aperture regulating plate 2 is attached by thermal caulking in close contact with the surface of the base plate 1 on the blade chamber side. If the opening 1a may be as small as the openings 2a and 3a, a pedestal having a predetermined shape corresponding to the pedestal provided on the attachment shafts 1c, 1d, and 1e is attached to the attachment shafts 1g and 1f. It is possible to form another blade chamber between the base plate 1 and the aperture regulating plate 2 by installing the aperture regulating plate 2 on the pedestal portion and attaching it with heat caulking. become. The present invention may be configured as such, and in this case, for example, the shutter device and the aperture device can be unitized as one device, for example, an opening portion. It is also possible to arrange two diaphragm blades having different sizes in separate blade chambers.

  Furthermore, in the case of the present embodiment, the mounting shaft 1f is erected on the ground plate 1. However, in the present invention, such a mounting shaft 1f is erected on the stator frame 6 and the ground plate 1 has a shaft. A hole corresponding to the portion 1 f-1 is formed, and the shaft portion 1 f-1 of the mounting shaft 1 f erected on the stator frame 6 is formed in the hole formed in the base plate 1 and the aperture restriction plate 2. The portion of the stepped surface forming portion of the shaft portion 1f-1 is dissolved while the base plate 1 and the diameter regulating plate 2 are overlapped with each other, and the stator frame 6 You may make it integrate. Also when comprised in this way, similarly to a present Example, one blade chamber was comprised by making two places of the shaft part 1f-1 and the shaft part 1f-2 of the attachment shaft 1f into a heat caulking part. It will be. Furthermore, in this embodiment and each of these modifications, it goes without saying that the number of blade chambers configured can be increased by increasing the number of heat caulking portions and the number of plate members provided on the mounting shaft 1f and the like. Yes.

  Next, Example 2 will be described with reference to FIGS. As can be seen from the description of the first embodiment, the point of the present invention is that a plurality of thin plate members can be attached by heat caulking to a common mounting shaft, and at least a blade chamber can be formed between these thin plate members. It is what I did. And in the case of Example 1, the case where two thin plate members called the aperture control board 2 and the cover board 3 were attached was demonstrated. On the other hand, in the present embodiment, the aperture plate 12, the intermediate plate 13, and the cover plate 14 which are three thin plate members are sequentially attached to the base plate 11, and two blade chambers are provided between the three thin plate members. Is configured. Therefore, in this embodiment, for example, the shutter device and the diaphragm device can be unitized as a single device, and two diaphragm blades having different opening sizes can be provided in separate blade chambers. It is also possible to arrange them. Therefore, in the description of the present embodiment, only the configuration of the position corresponding to the standing position of the mounting shaft 1f in the first embodiment will be described in detail, and the other configuration description will be omitted.

  FIG. 5 shows a part of the base plate 11 made of synthetic resin in the present embodiment, and an attachment shaft 11a is erected on the base plate 11 by integral molding. And this attachment shaft 11a is formed in order of the cross-sectional area from the main plate 11 side, the shaft portion 11a-1 having an oval cross-sectional shape, the shaft portion 11a-2 having an oval cross-sectional shape, The shaft portion 11a-3 has a circular shape. And between adjacent shaft parts, the cross section of the shaft part with the smaller cross-sectional area is formed so as not to protrude from the cross section of the shaft part with the larger cross-sectional area. A step surface is formed on the shaft.

  First, the mounting configuration of the aperture restriction plate 12 will be described. A hole 12a having a shape corresponding to the shaft portion 11a-1 of the mounting shaft 11a is formed in the aperture restricting plate 12, and a state in which the hole 12a is fitted to the shaft portion 11a-1 is shown in FIG. It is shown. In this state, the base plate 11 and the aperture restriction plate 12 are in close contact, and most of the shaft portion 11a-1 protrudes from the hole 12a. Here, the diameter regulating plate 12 is attached by applying a heating tool from above in FIG. 6 to a part of the stepped surface forming portion of the shaft portion 11a-1 and deforming it into a bowl shape. FIG. 7 shows a state where the aperture regulating plate 12 is attached in such a manner.

  Next, the mounting structure of the intermediate plate 13 will be described. A hole 13a having a shape corresponding to the shaft portion 11a-2 of the mounting shaft 11a is formed in the intermediate plate 13, and a state in which the hole 13a is fitted to the shaft portion 11a-2 is shown in FIG. Yes. Therefore, in this state, the aperture regulating plate 12 and the intermediate plate 13 are kept at a predetermined interval, and most of the shaft portion 11a-2 protrudes from the hole 13a. In such a state, a state in which the intermediate plate 13 is attached by applying a heating tool from above in FIG. 8 to a part of the stepped surface forming portion of the shaft portion 11a-2 and deforming it into a bowl shape. Is shown in As a result, one blade chamber is formed between the aperture regulating plate 12 and the intermediate plate 13.

  Finally, the mounting configuration of the cover plate 14 will be described. A hole 14a having a shape corresponding to the shaft portion 11a-3 of the mounting shaft 11a is formed in the cover plate 14, and a state in which the hole 14a is fitted to the shaft portion 11a-3 is shown in FIG. Yes. For this reason, in this state, the intermediate plate 13 and the cover plate 14 are kept at a predetermined interval, and most of the shaft portion 11a-3 protrudes from the hole 14a. FIG. 11 shows a state in which the cover plate 14 is attached in such a state by applying a heating device to the tip of the shaft portion 11a-3 from above in FIG. As a result, a second blade chamber is formed between the intermediate plate 13 and the cover plate 14.

  In the case of this embodiment, three locations of the mounting shaft 11a erected on the base plate 11 are the heat caulking portions, and the two blade chambers are formed by attaching the aperture regulating plate 12, the intermediate plate 13 and the cover plate 14. It is composed. However, as described above as one of the modifications of the first embodiment, the mounting shafts 1c, 1d, and 1e of the first embodiment are used even when the three locations of the mounting shaft 11a are heat caulking portions. If a pedestal portion having a predetermined shape corresponding to the pedestal portion provided on the mounting shaft 11a is provided at a standing portion of the mounting shaft 11a and the aperture restriction plate 12 is mounted on the pedestal portion and attached by thermal caulking, the base plate 11 and the aperture restriction plate are provided. It is possible to form another blade chamber between the two.

  Also, in the case of the present embodiment, the mounting shaft 11a is erected on the main plate 11, but the present invention is such that the mounting shaft 11a is erected on the stator frame 6 described in the first embodiment. The base plate 11 has a hole corresponding to the shaft portion 11 a-1, and the shaft portion 11 a-1 of the mounting shaft 11 a erected on the stator frame 6 is connected to the hole and the aperture formed in the base plate 11. It fits in both the hole 12a formed in the control board 12, and melt | dissolves a part of level | step difference surface formation site | part of the axial part 11a-1 in the state which piled up the base plate 11 and the aperture control board 12, and set the diameter. The restriction plate 12 may be caulked with heat. And also when comprised in this way, two blade | wings are made into the heat caulking part by making three places of the shaft part 11a-1, 11a-2, 11a-3 of the attachment axis | shaft 11a similarly to a present Example. The room has been configured. Furthermore, in this embodiment and each of these modifications, it goes without saying that the number of blade chambers can be increased by increasing the number of heat caulking portions and the number of plate members provided on the mounting shaft 11a. .

It is a top view of Example 1 comprised as a shutter apparatus, and the imaging | photography standby state which made the shutter blade | wing fully open is shown. 1 is a cross-sectional view of a main part of Example 1. FIG. 1 is an exploded perspective view of Example 1. FIG. FIG. 3 is a plan view of Example 1 and shows a state immediately after the end of photographing with the shutter blades closed. It is the perspective view which showed a part of structure of Example 2, Comprising: Only the part of the ground plate which installed the attachment axis | shaft was shown. FIG. 6 is a perspective view of the second embodiment shown in the same manner as FIG. 5, showing a state in which a hole of the aperture restricting plate is fitted to the shaft portion having the largest cross-sectional area formed on the mounting shaft. . FIG. 9 is a perspective view of the second embodiment shown in the same manner as FIG. 6, showing a state in which the aperture restriction plate is attached to the largest shaft portion of the attachment shaft by heat caulking. FIG. 9 is a perspective view of the second embodiment shown in the same manner as FIG. 7, showing a state in which a hole of the intermediate plate is fitted to the second largest shaft portion of the cross-sectional area formed on the mounting shaft. . FIG. 9 is a perspective view of the second embodiment shown in the same manner as FIG. 8, showing a state in which the intermediate plate is attached to the second largest shaft portion of the attachment shaft by heat caulking. FIG. 10 is a perspective view of the second embodiment shown in the same manner as FIG. 9 and shows a state in which a hole of the cover plate is fitted to the shaft portion having the smallest cross-sectional area formed on the mounting shaft. FIG. 11 is a perspective view of the second embodiment shown in the same manner as FIG. 10, showing a state where the cover plate is attached to the smallest shaft portion of the attachment shaft by heat caulking.

Explanation of symbols

1, 11 Ground plate 1a, 2a, 3a Opening 1b, 2b, 3b, 4b Long hole 1c-1g, 1k, 1m, 11a Mounting shaft 1f-1, 1f-2, 11a-1 to 11a-3 Shaft 1h, Reference Signs List 1i Stopper shaft 1j Blade shaft 1n Rotating shaft 2,12 Diameter restriction plate 2c to 2e, 3c to 3i, 4a, 6b, 6c, 12a, 13a, 14a Hole 2f, 2g Notch portion 3, 14 Cover plate 4 Shutter blade 5 Rotor 5a Permanent magnet 5b Arm 5c Output pin 6 Stator frame 6a Bobbin portion 7 Coil 8 Yoke 13 Intermediate plate

Claims (3)

  At least one mounting shaft is erected on the blade chamber side surface by integral molding, and the mounting shaft is at least in descending order of the cross-sectional area in the direction perpendicular to the axis of the mounting shaft from the blade chamber side surface. A shaft having a large cross section so that the cross section of the shaft portion having the smaller cross-sectional area does not protrude from the cross section of the shaft portion having a larger cross section between two adjacent shaft portions. The base plate made of synthetic resin with a stepped surface formed in the part and the holes corresponding to the cross-sectional shape of the shaft part, each having a large hole, are fitted into the shaft parts in order. At least two plate members, and each plate member, in order from the base plate side, after fitting the hole into the shaft portion, the step surface forming portion of the shaft portion It is attached by heat-dissolving part of it and deforming it into a bowl shape. Only the plate member fitted to the most advanced shaft part of the mounting shaft is attached by melting all the tips of the shaft part into a bowl shape, and a blade between two adjacent plate members. A camera blade driving device comprising a chamber.   Of the plate members, the plate member attached closest to the surface on the blade chamber side of the main plate is second from the surface on the blade chamber side of the main plate among the shaft portions formed on the attachment shaft. 2. The blade driving device for a camera according to claim 1, wherein the blade driving device is attached to a shaft portion and forms a blade chamber between the plate member and the ground plate.   The mounting shaft is erected on a synthetic resin stator frame, and the base plate has a hole corresponding to the cross-sectional shape of the shaft portion having the largest cross-sectional area of the mounting shaft, The stator frame is formed by fitting the shaft portion having the largest cross-sectional area into the hole of the ground plate, and heat-dissolving a part of the stepped surface forming portion of the shaft portion to deform into a bowl shape. The camera blade driving device according to claim 1, wherein an actuator chamber is formed between the mounting plate and the ground plate.

Images