JP4628091B2 - Camera blade drive - Google Patents

Description

  The present invention relates to a camera blade driving device applicable to a shutter device, a diaphragm device, a filter device, and a lens barrier device.

  As is well known, the shutter device, the diaphragm device, the filter device, and the lens barrier device provided in the compact camera are arranged in the vicinity of the photographing lens, and the blades of these devices are in relation to the optical axis of the photographing lens. It is configured to reciprocate on a vertical surface. Also, the blades provided in these devices are usually two in many cases, and they are reciprocated simultaneously in opposite directions. These reciprocating operations may be rotation or straight travel.

  By the way, in general, a compact camera has a camera body (camera body) as a whole having a thin rectangular parallelepiped (a hexahedron composed of two surfaces having a large area and four elongated surfaces having a smaller area). When doing, it is standard to have one of the two large areas facing the subject. The photographing lens is arranged at a substantially central position on one large surface. Therefore, various blade driving devices assembled to such a standard design camera, for example, as in the shutter device described in Patent Document 1 below, the shape of the ground plane is related to the shape of the blade, It has a circular shape centered on the optical path opening or a shape similar thereto.

  However, the blade driving device provided with the base plate having such a shape can be used to subject the elongated surface of the camera body, which has a substantially hexahedral flat shape, to the subject, as was the case with the previous 110-size (film) camera. Cameras designed to shoot towards the camera cannot be assembled. Recently, digital cameras have become widespread and the camera body has become extremely thin. Among them, there is a camera having a design as described in Patent Document 2 below. Even though this camera is designed to hold one of the two large areas facing the subject when taking a picture, it uses a refractive optical system to introduce the subject light into the camera body. Therefore, the photographic lens faces the elongated surface of the camera body described above in the camera body. Therefore, the blade driving device provided with the base plate having a shape as described in Patent Document 1 cannot be assembled to a camera having such a design.

Therefore, by changing the shape and configuration of the blades and making the base plate into an elongated shape, not only a camera with the above-described standard design but also a camera with a design such as a 110 (film) camera is disclosed in Patent Document 2. FIG. 2 of Patent Document 3 below discloses an aperture device that can be assembled to a camera having a design as described above. This diaphragm device is formed with a notch for restricting the diaphragm aperture on the diaphragm blade, but by not forming the notch, it can be applied to both the shutter device and the barrier device. If an ND filter plate is attached so as to cover the notch, it can also be applied to a filter device. Thus, the present invention relates to a camera blade driving device having a long and narrow base plate.
JP 2002-196391 A Japanese Patent Laid-Open No. 2002-290806 Utility Model Registration No. 2520247

  By the way, even in the case of a blade drive device having such a long and narrow base plate, the length of the base plate is set as much as possible in order to contribute to the miniaturization of the camera and to increase the degree of freedom in designing the camera. There is a demand for shortening. From such a point of view, when the diaphragm device described in FIG. 2 of Patent Document 3 is viewed, the two diaphragm blades are operated in opposite directions along the longitudinal direction of the main plate. Therefore, the base plate has a configuration in which a space larger than at least the optical path opening must be provided on both sides of the optical path opening (“light receiving opening” in Patent Document 3).

  Of these spaces, one of the spaces needs to be provided with a driving means or a connecting mechanism between the driving means and the diaphragm blades. Therefore, it is not easy to shorten the longitudinal dimension of the main plate. On the other hand, the other space is mainly for securing the operating region of the diaphragm blades, so if the shape and configuration of the diaphragm blades are devised, the size of the longitudinal direction of the main plate in that space can be reduced. There is a possibility. When this is possible, not only is it advantageous for downsizing of the camera, but it can also be employed in a camera in which the optical path opening is arranged near the end or corner of the camera body. Therefore, it becomes more advantageous when used for digital cameras with various designs.

  The present invention has been made in order to solve such problems, and the object of the present invention is to provide two blades as in the related art in a camera blade driving device having an elongated base plate. By adopting a unique configuration without operating in opposite directions around the optical path opening, shorten one of the two spaces between the optical path openings in the longitudinal direction of the main plate. It is an object of the present invention to provide a camera blade drive device that can be used.

In order to achieve the above object, a blade driving device for a camera according to the present invention has an optical path opening, and is disposed on the blade chamber side between one of its longitudinal ends and the optical path opening. A base plate whose surface is a blade mounting region, a cover plate that is attached to the base plate and forms a blade chamber between the base plate, and a drive pin that can reciprocate and has a longitudinal direction of the base plate A driving means attached to the one end side of the lens, an opening larger than the opening for the optical path, and a long hole into which the driving pin is fitted, and reciprocates in the blade attachment region. wherein the first blade comprising a single vane that is caused to advance and retreat in the optical path opening, and the drive pin is fitted is long hole of the ground plate have available by mounted and the drive pin before SL blade mounting territory is located between the first blade The have a second blade comprising at least one blade which is caused to advance and retreat in the optical path opening, a long hole into which the drive pin is fitted by rotatably mounted and said drive pin said optical path opening is rotated in the opposite direction to that of the second blade by the drive pin rotatably attached to the disposed in front Symbol blade attachment region between the cover plate and the first blade A third blade composed of at least one blade that is advanced and retracted, and when the second blade and the third blade are caused to enter the optical path opening by the drive pin , the optical axis direction When the first blades are overlapped from the front end side when viewed from the above, the first blades are moved into the optical path opening by the drive pins together with the second blades and the third blades and stopped when the first blades stop. Two And to cover the peripheral region of the optical path opening which is not covered in said third blade.

In that case, the first blade may be slidably attached to the blade attachment region, or may be attached rotatably. Moreover, even before SL drive means is reciprocally rotating motor, by reciprocating the drive pin, the first blade, the second blade, preferably to actuate said third blade at the same time .

In addition, an opening regulating edge is formed in one blade constituting the second blade and one blade constituting the third blade, and the optical path opening is formed by the drive pin . If the aperture restriction edge of both of them is used to form an opening smaller than the opening for the optical path, the aperture device can be obtained. One of the two blades formed is a blade disposed adjacent to the base plate or the cover plate, and the blade has the small opening on the surface on the side of the adjacent base plate or the cover plate. An ND filter plate is attached so that the opening can be covered at the time of formation, and the ground plate or the cover plate adjacent to the blades escapes so as not to contact the ND filter plate when the blades are operated. Part is formed If so, it is possible to obtain a filter device.

  According to the present invention, in a blade driving device for a camera having an elongated base plate, all blades are attached to one of two spaces with an optical path opening therebetween, and the length in the longitudinal direction of the base plate in the other space is set. Since it can be shortened, it is possible to reduce the size, increase the degree of freedom in designing the camera design, and the camera in which the optical path opening is located toward the end of the camera body Can also be assembled.

  Embodiments of the present invention will be described with reference to five illustrated examples. 1 to 6 are for explaining the shutter device of the first embodiment, and FIGS. 7 and 8 are for explaining the shutter device of the second embodiment. 9 and 10 are for explaining the diaphragm device of the third embodiment, and FIGS. 11 and 12 are for explaining the diaphragm device of the fourth embodiment. Further, FIGS. 13 and 14 are for explaining the filter device of the fifth embodiment.

  The shutter device according to the first embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is an exploded perspective view of the shutter device. 2 to 6 are plan views showing the operating state of the shutter blades by removing the cover plate from the shutter device shown in FIG. 1, and FIG. 2 shows the fully opened state of the shutter blades. 3 shows a state immediately after the start of the shutter blade closing operation, FIG. 4 shows a state substantially in the middle of the shutter blade closing process, FIG. 5 shows a state immediately before the end of the shutter blade closing operation, and FIG. The closed state is shown.

  First, the configuration of this embodiment will be described mainly with reference to FIG. The ground plane 1 is made of synthetic resin and has a long and relatively flat plate shape. The cover plate 2 is made of a thin metal plate and has substantially the same outer shape as the main plate 1. The cover plate 2 is attached to the base plate 1 at a predetermined interval by means not shown, and constitutes a blade chamber between the cover plate 2 and the base plate 1. In the base plate 1, an opening 1a for the subject optical path is formed on the left side of the center portion. For this reason, when viewed in the longitudinal direction of the main plate 1, the region between the opening 1 a and the left end is smaller than the region between the opening 1 a and the right end. In this embodiment, only the blade chamber side surface between the opening 1a and the right end is the blade attachment region.

  In addition, the cover plate 2 is also provided with an opening 2a for the subject optical path at a position facing the opening 1a. The opening 2a has a shape similar to that of the opening 1a, but is slightly larger than the opening 1a. Therefore, in the case of the present embodiment, the opening 1a regulates the photographing optical path. However, the opening 2a may be made smaller to restrict the photographing optical path. Further, when the photographing optical path is restricted by the opening 1a as in the present embodiment, the role of the cover plate 2 is simply that each blade described later can stably operate with the base plate 1. As long as such functions are not impaired and do not affect the optical path of the subject, the opening 2a may have any shape. Therefore, it is not necessary to have a hole shape.

  In addition, the shaft 1 has six shafts 1b, 1c, 1d, 1e, 1f, and 1g standing in its blade mounting region, and four columnar stoppers 1h, 1i, 1j, and 1k. Has been. The tips of the shafts 1b, 1c, 1d, 1e, 1f, and 1g are inserted into holes 2b, 2c, 2d, 2e, 2f, and 2g formed in the cover plate 2, respectively, and stoppers 1h, 1i, 1j , 1k are inserted into holes 2h, 2i, 2j, 2k formed in the cover plate 2, respectively. Further, an arc-shaped long hole 1 m penetrating the base plate 1 is formed in the blade mounting region of the base plate 1. The long hole 1m is difficult to understand because FIG. 1 is a perspective view, but actually has an arc shape. The cover plate 2 is also formed with a long hole 2m having the same shape as the long hole 1m at a position facing the long hole 1m. In addition, illustration of the long hole 1m is abbreviate | omitted in FIGS.

  A motor 3 is attached to a surface of the base plate 1 opposite to the blade mounting region, that is, a surface outside the blade chamber, as a shutter blade driving means. In the case of this embodiment, the motor 3 is a current-controlled moving magnet type motor having a well-known configuration as described in Japanese Patent Application Laid-Open No. 2004-214847. The motor 3 includes a rotor having a permanent magnet and reciprocatingly rotating within a predetermined angle range. A drive pin 3 a that rotates integrally with the rotor is a long hole 1 m of the main plate 1. , And the tip is inserted into the long hole 2m of the cover plate 2.

  In the blade chamber formed between the main plate 1 and the cover plate 2, shutter blades driven by the drive pins 3 a of the motor 3 are arranged. Although the shutter blades of the present embodiment are composed of five blades, the five blades can be classified into three according to the operation mode. First, belonging to the first classification is a blade 4 arranged in the middle of five blades, and this blade 4 has an opening 4a larger than the opening 1a of the main plate 1 and three long holes. 4b, 4c, 4d. The long hole 4b is fitted to the shaft 1c, the long hole 4c is fitted to the two shafts 1d and 1e, and the long hole 4d is fitted to the drive pin 3a. Therefore, the blade 4 slides linearly in the length direction of the long holes 4b and 4c when the drive pin 3a reciprocates.

  The two blades 5 and 6 disposed between the main plate 1 and the blades 4 belong to the second category. Among them, the blade 5 arranged on the base plate 1 side has a circular hole 5a and a long hole 5b, and the hole 5a is fitted to the shaft 1c. The long hole 5b is hidden by the blade 6 and its shape is difficult to understand, but has a shape similar to the long hole 4d of the blade 4 and is fitted to the drive pin 3a. Therefore, both the long hole 4b of the blade 4 and the hole 5a of the blade 5 are fitted to the shaft 1c. The other blade 6 arranged on the blade 4 side has a circular hole 6a and a long hole 6b. The hole 6a is fitted to the shaft 1b, and the long hole 6b is fitted to the drive pin 3a. It is combined. When the drive pin 3a is reciprocated, these blades 5 and 6 are simultaneously reciprocated in the same direction around the shafts 1b and 1c. However, the shaft 1c is more in the direction of operation of the drive pin 3a. Since it is erected nearer than the shaft 1b, the blade 5 rotates larger (faster) than the blade 6.

  The two blades 7 and 8 disposed between the cover plate 2 and the blades 4 belong to the third category. Among them, the blade 7 arranged on the cover plate 2 side has a circular hole 7a and a long hole 7b. The hole 7a is fitted to the shaft 1f, and the long hole 7b is fitted to the drive pin 3a. ing. The other blade 8 arranged on the blade 4 side has a circular hole 8a and a long hole 8b. The hole 8a is fitted to the shaft 1g, and the long hole 8b is fitted to the drive pin 3a. It is combined. The blades 7 and 8 are reciprocally rotated in the same direction around the shafts 1f and 1g when the drive pin 3a is reciprocated. However, the relationship between the shafts 1c and 1b with respect to the drive pin 3a described above For the same reason, the blade 7 rotates larger (faster) than the blade 8. Further, at this time, the blades 7 and 8 are operated simultaneously with the blades 5 and 6, but their rotational directions are opposite to those of the blades 5 and 6.

  Next, the operation of the present embodiment will be described with reference to FIGS. 2 to 6, which are shown with the cover plate 2 described in FIG. 1 removed. In these drawings, the reference numerals are omitted for the long holes 4d, 5b, 6b, 7b, and 8b of the blades 4 to 8 fitted to the drive pin 3a described in FIG. . Note that the shutter device of this embodiment can be used for both a silver salt film camera and a digital camera. As is well known, in the case of this type of shutter device, the order in which the shutter blades are operated is usually different depending on whether the shutter device is used in a silver salt film camera or a digital camera. is there. However, since it is not necessary to explain both of them here, only a general operation method when employed in a digital camera will be described.

  FIG. 2 shows an initial state (shooting standby state) when employed in a digital camera, and the power switch of the camera is on. For this reason, the subject light incident on the photographing lens passes through the opening 1a and strikes the solid-state imaging device, and the photographer can observe the subject image on the monitor. At this time, the stator coil of the motor 3 is not energized. However, as is well known (also described in the above Japanese Patent Application Laid-Open No. 2004-214847), the rotor is fixed to the magnetic pole of the permanent magnet. Due to the positional relationship of the child with the magnetic member, the rotor is given a force that rotates in one direction. Therefore, in FIG. 2, the drive pin 3a also rotates with the clockwise rotation of the rotor, and a force to move rightward is applied. However, the blades 5 and 6 come into contact with the stopper 1h, and the blade Since 7 is in contact with the stopper 1j, this state is maintained.

  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, the stator coil of the motor 3 is energized by a signal from the exposure control circuit, and the rotor is rotated counterclockwise. Therefore, the drive pin 3a also moves leftward while drawing an arc, and pushes the edges of the long holes (reference numerals are omitted) of the five blades 4-8. Thus, the middle blade 4 is guided by the shafts 1c, 1d, and 1e and slides linearly in the lower left direction. The blades 5 and 6 rotate counterclockwise on the shafts 1c and 1b, respectively, and the blades 7 and 8 rotate clockwise on the shafts 1g and 1f, respectively. FIG. 3 shows a state in which the blade 4 starts to operate linearly, the blades 5 and 6 and the blades 7 and 8 start to rotate in opposite directions, and the opening 1a starts to close. It shows the state.

  FIG. 4 shows a state in which the five blades 4 to 8 have reached a substantially intermediate position in the closing operation stroke. By the way, in the case of a present Example, each blade | wing 4-8 has an elongate shape as a whole, and all the ends are attached to the ground plane 1 in the area | region of the right direction of the opening part 1a. In blade drive devices for cameras, it is known that such elongate blades can move in a complex manner during operation and can be deflected. If the blade 4 having the opening 4a is not present when bent in such a manner, the tip of the blades 5 and 6 and the blade 7 in the operation stroke immediately after the state of FIG. , 8 will collide and mesh with each other. However, in the case of the present embodiment, since the blade 4 having the opening 4a is disposed between them, such tip portions are not even in contact with each other. Therefore, after that, each blade is in the state shown in FIG. 5 without such a situation.

  Thereafter, when the opening 1a is completely closed, the blade 4 comes into contact with the stopper 1k immediately after that. At this time, the blades 4 may be bent slightly or the tolerance of the fitting portion of each blade may be affected, and the other blades 5 to 8 may continue to rotate slightly. However, such rotation is prevented by the blade 5 coming into contact with the stopper 1j and the blades 7 and 8 coming into contact with the stopper 1h, and finally stops in the state shown in FIG. As can be seen from FIG. 6, at this time, the blade 4 covers the upper left portion of the opening 1a that cannot be covered by the other four blades 5-8. If the function of the blades 4 is only to prevent the meshing during operation as described above, the blades 4 need only be fixedly arranged between the base plate 1 and the cover plate 2 like a known intermediate plate. However, in the case of the present embodiment, since it is not only that, it is configured as a blade in this way.

  When the opening 1a is closed in this way, the imaging information accumulated as charges in the solid-state imaging device in that state is transferred to the storage device. When the transfer is completed, the stator coil of the motor 3 is energized in the opposite direction to the above case. Therefore, the rotor also rotates in the reverse direction, and in FIG. 6, the drive pin 3a is actuated rightward in an arc shape. Therefore, the five blades 4 to 8 operate in the reverse manner to the above and open the opening 1a. When the opening 1a is fully opened, immediately after that, the blades 5 and 6 come into contact with the stopper 1h, and the blade 7 comes into contact with the stopper 1j. At this time, even if the abutting blades 5, 6 and 7 are bent, the blade 4 abuts against the stopper 1i, so that it finally stops in the state shown in FIG. When the energization of the stator coil of the motor 3 is cut off, the initial state is restored.

  Although the present embodiment is a shutter device, when the blades 4 to 8 are arranged to open and close on the front surface (subject side) of the photographing lens, the lens barrier device is employed in the camera. Is possible. This is the same in the case of the second embodiment described below.

  Next, Example 2 will be described with reference to FIGS. This embodiment is also a shutter device, and FIG. 7 shows a fully opened state of the shutter blades with the cover plate removed, as in FIG. 2, and FIG. It shows a closed state. First, the configuration will be described. The base plate 11 of the present embodiment is also made of synthetic resin and forms a blade chamber with a cover plate (not shown), but the cover plate is not shown. An opening 11a for the subject optical path is formed on the base plate 11 to the right of the center portion, and the blade chamber side surface between the left end of the base plate 11 and the opening portion 11a is a blade attachment region. Further, the cover plate (not shown) is also provided with an opening for the subject optical path at a position facing the opening 11a. However, in this embodiment as well, the opening 11a regulates the photographing optical path. It has become.

  The base plate 11 is provided with three shafts 11b, 11c, 11d and three stoppers 11e, 11f, 11g on the surface on the blade chamber side. Of these, the three shafts 11b, 11c, 11d and the stopper 11f are provided in the blade attachment region. An arc-shaped long hole 11 h is formed in the blade mounting region of the base plate 11. A motor 12 is attached to the back surface of the blade mounting region of the base plate 11, that is, the surface outside the blade chamber. The motor 12 of the present embodiment is a motor having the same configuration as the motor 3 of the first embodiment, and includes a rotor 12a having a permanent magnet and reciprocatingly rotating only within a predetermined angle range. The drive pin 12b that rotates integrally with the rotor 12a passes through the long hole 11h and extends into the blade chamber.

  The shutter blade of this embodiment arranged in the blade chamber is composed of three blades 13, 14, 15. Among them, the blade 13 disposed in the middle has an opening 13a larger than the opening 11a of the main plate 11, a circular hole, and a long hole, and the circular hole can be rotated about the shaft 11c. The long hole is fitted to the drive pin 12b. Therefore, in the case of this blade 13, unlike the blade 4 of the first embodiment, when the drive pin 12b reciprocates, it rotates on the shaft 11c. Moreover, the blade | wing 14 arrange | positioned between the blade | wing 13 and the baseplate 11 has a circular hole and an elongate hole, makes a circular hole fit rotatably to the axis | shaft 11b, and is a long hole. Is fitted to the drive pin 12b. Further, the blade 15 disposed between the blade 13 and the cover plate has a circular hole and a long hole, and the circular hole is rotatably fitted to the shaft 11d so that the long hole is formed. The drive pin 12b is fitted. The blades 13, 14, and 15 are configured to rotate larger (faster) in order of increasing distance from the operation locus of the drive pin 12 b to each of the rotation shafts 11 c, 11 b, and 11 d.

  Next, the operation of the present embodiment will be briefly described. In the case of the present embodiment, it will be described in the case of being adopted in a digital camera. FIG. 7 shows an initial state (photographing standby state) of the present embodiment, and at this time, the power switch of the camera is in an ON state. Therefore, in this initial state, the photographer can observe the subject image on the monitor. At this time, the stator coil of the motor 12 is not energized, but due to the positional relationship between the magnetic poles of the permanent magnet of the rotor 12a and the magnetic member of the stator, the rotor 12a rotates counterclockwise. The power to do is given. Therefore, the driving pin 12b applies a force that rotates counterclockwise to the blades 13 and 14, and a force that rotates clockwise to the blade 15, but the blades 13 and 14 are stopped by the stoppers 11f and 11e. This state is maintained because it is touching.

  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, the stator coil of the motor 3 is energized by a signal from the exposure control circuit, and the rotor 12a is rotated clockwise. Therefore, the driving pin 12b rotates the blade 13 and the blade 14 having the opening 13a in the clockwise direction and the blade 15 in the counterclockwise direction, thereby closing the opening 11a. At this time, if the vane 13 is not present, the vane 14 and the vane 15 rotate in opposite directions, so that they may be bent during operation and their tips may mesh with each other. In this case, since the blade 13 exists between the blades 14 and 15, such a situation does not occur.

  When the opening 11a is completely closed, the blade 13 comes into contact with the stopper 11g immediately after that, and the rotation of the rotor 12a and the three blades 13, 14, 15 stops. FIG. 8 shows the stop state. As can be seen from FIG. 8, at this time, the blade 13 covers the upper region of the opening 11a that cannot be covered by the other two blades 14 and 15 alone. Accordingly, the blade 13 having the opening portion 13a has such a role as well as a role for preventing the blades 14 and 15 from being engaged during the closing operation as described above.

  When the opening 11a is closed in this manner, the imaging information accumulated as charges in the solid-state imaging device in that state is transferred to the storage device. When the transfer is completed, the stator coil of the motor 12 is energized in the direction opposite to the above case. Thereby, the rotor 12a rotates counterclockwise, the blades 13 and 14 rotate counterclockwise, and the blade 15 rotates clockwise, thereby opening the opening 11a. Thereafter, when the opening 11a is fully opened, immediately after that, the blade 13 comes into contact with the stopper 11f, and the blade 14 comes into contact with the stopper 11e, so that the rotor 12 and the three blades 13, 14, 15 rotate. Stop. When the energization to the stator coil of the motor 12 is cut off, the initial state shown in FIG. 7 is restored.

  In the case of this embodiment, the blades 14 and 15 on both sides of the blade 13 are each configured as one sheet, but may be configured as two sheets each as in the first embodiment. Alternatively, only one of the two may be configured. Therefore, in the case of the first embodiment, either one of the two-blade blades 5 and 6 and the blades 7 and 8 may be configured as one sheet, or both may be configured as one sheet. Absent.

  Next, Example 3 will be described with reference to FIGS. 9 and 10. This embodiment is a diaphragm device, and FIG. 9 shows a photographing standby state of the diaphragm blade in the blade chamber with the cover plate removed, and FIG. 10 shows the diaphragm blade narrowed state in the same manner. It is shown. The diaphragm blades of this embodiment are composed of five blades, similar to the shutter blades of the first embodiment, and the operation thereof is similar to that of the shutter blades of the first embodiment. First, the configuration of this embodiment will be described. The base plate 21 is made of synthetic resin, and an opening 21a for a subject optical path is formed on the right side of the center. And the area | region of the blade chamber side which exists between a left end and the opening part 21a is made into the blade | wing attachment area | region. Further, a cover plate (not shown) is attached to the main plate 21 and constitutes a blade chamber between the cover plate 21 and the main plate 21. In the cover plate, a subject optical path opening slightly larger than the opening 21a is formed at a position facing the opening 21a. Therefore, also in the present embodiment, the opening 21a formed in the base plate 21 regulates the photographing optical path.

  In the base plate 21, six shafts 21b, 21c, 21d, 21e, 21f, and 21g are erected in the blade mounting region, and two columnar stoppers 21h and 21i are erected. The shafts and the tips of the stoppers are inserted into holes formed in a cover plate (not shown). In addition, an arc-shaped long hole is formed in the blade mounting region of the base plate 21 in the same manner as the long hole 1m of the base plate 1 in the first embodiment, but the illustration thereof is omitted in FIGS. ing. In addition, a long hole having the same shape is formed in a cover plate (not shown) at a position facing the long hole. Further, the base plate 21 has a motor having the same configuration as that of the motors 3 and 12 of the first and second embodiments mounted on the surface opposite to the blade mounting region as a driving unit for the diaphragm blades. The rotor 22 and the drive pin 23 are shown. And the drive pin 23 penetrates the above-mentioned long hole (not shown) of the main plate 21, and its tip is inserted into the long hole of the cover board (not shown).

  A diaphragm blade driven by a motor drive pin 23 is disposed in the blade chamber. The diaphragm blades of the present embodiment are composed of five blades as described above. The blade 24 arranged in the middle of the blades has an opening 24a larger than the opening 21a of the main plate 21 and three long holes. Then, the first long hole 24b is fitted to the shaft 21c, the second long hole 24c is fitted to the two shafts 21d and 21e, and the third long hole without a mark is fitted to the drive pin 23. It is combined. Therefore, the blade 24 slides linearly in the length direction of the long holes 24b and 24c when the drive pin 23 reciprocates.

  Of the two blades 25 and 26 arranged between the main plate 21 and the blade 24, the blade 25 arranged on the side of the main plate 21 has a circular hole 25a and a long hole not labeled. In addition, the hole 25a is rotatably fitted to the shaft 21b, and the long hole is fitted to the drive pin 23. Further, the other blade 26 arranged on the blade 24 side has a circular hole 26a, a long hole not labeled, and an opening regulating edge 26b, and the hole 26a is fitted to the shaft 21c. The long hole is fitted to the drive pin 23. These blades 25 and 26 are simultaneously reciprocated in the same direction around the shafts 21b and 21c when the drive pin 23 is reciprocated. As described above, the blade 26 is more than the blade 25. It is designed to rotate large (fast).

  Further, of the two blades 27 and 28 disposed between the cover plate and the blade 24 not shown, the blade 27 disposed on the cover plate side is not labeled with the circular hole 27a. It has a long hole, the hole 27a is fitted to the shaft 21g, and the long hole is fitted to the drive pin 23. The other blade 28 arranged on the blade 24 side has a circular hole 28a, a long hole not labeled, and an opening regulating edge 28b, and the hole 28a is fitted to the shaft 21f. The long hole is fitted to the drive pin 23. When the drive pin 23 is reciprocated, the blades 27 and 28 are simultaneously reciprocated in the same direction around the shafts 21g and 21f. As described above, the blade 28 is more than the blade 27. It is designed to rotate large (fast). At this time, the blades 27 and 28 are operated simultaneously with the blades 25 and 26, but the rotation directions of the blades 25 and 26 are opposite to each other.

  Next, the operation of this embodiment will be described. Note that the aperture device of this embodiment can be used for both a silver salt film camera and a digital camera. As is well known, in the case of this type of aperture device, the opening 21a is fully opened before shooting, regardless of whether it is used in a silver salt film camera or a digital camera. It is normal to make it. Therefore, the description of the operation of the present embodiment will also be described in such a case. FIG. 9 shows an initial state (photographing standby state) of the present embodiment, and the power switch of the camera is turned on. At this time, the stator coil of the motor is not energized, but the rotor 22 is applied with a counterclockwise rotating force as in the case of the above embodiments, but the blade 24 is a stopper. Since this is in contact with 21h, this state is maintained.

  When the release button is pressed at the time of shooting, whether to shoot with the subject light dimmed or not dimmed is determined according to the photometric result of the photometric device. And when it is judged that it should image | photograph without dimming, imaging | photography is performed with the state shown in FIG. 9, and a diaphragm | throttle device does not operate | move at all. On the other hand, when it is determined that the light should be dimmed, the stator coil of the motor is energized and the rotor 22 is rotated clockwise. Therefore, the drive pin 23 also moves in an arc shape and pushes the edges of the long holes (reference numerals are omitted) of the five blades 24 to 28. Accordingly, the middle blade 24 is guided by the shafts 21c, 21d, and 21e and slides linearly in the lower right direction. Further, the blades 25 and 26 rotate clockwise around the shafts 21b and 21c, respectively, and the blades 27 and 28 rotate counterclockwise around the shafts 21g and 21f, respectively. That is, the blade 24 operates linearly, but the blades 25 and 26 and the blades 27 and 28 rotate in opposite directions to cover the opening 21a.

  In this operation stroke, if the blades 24 are not provided, the tips of the four blades 25, 26, 27, 28 are easily bent, and the tips of the blades 25, 26 collide with the tips of the blades 27, 28. In the present embodiment, the blade 24 having the opening 24a is disposed between the blades 25 and 26 and the blades 27 and 28. Therefore, such a situation does not occur. The operation performed in this way stops when the blades 24 and 25 abut against the stopper 21i. FIG. 10 shows the stopped state. At this time, the aperture opening is restricted by the opening restriction edge 26 b of the blade 26 and the opening restriction edge 28 b of the blade 28. Therefore, this state can be called a narrowed state. At this time, the blade 24 covers the upper right portion of the opening 21a that is not covered by the other four blades 25-28. Therefore, also in the case of the present embodiment, the blade 24 has such a role and a role for preventing the meshing during the operation as described above.

  When the state shown in FIG. 10 is obtained in this way, photographing is performed by a shutter device or the like. When the photographing is completed, the motor stator coil is energized in the opposite direction to the above case. Therefore, the rotor 22 rotates counterclockwise, and the drive pins 23 actuate the five blades 24 to 28 in the opposite direction. Then, when the opening 21a is fully opened, immediately after that, the blade 24 comes into contact with the stopper 21h, and the operation of the rotor 22 and the five blades 24-28 stops. When the motor stator coil is de-energized, the initial state shown in FIG. 9 is restored.

  Next, Example 4 will be described with reference to FIGS. 11 and 12. This embodiment is also a diaphragm device, and FIG. 11 shows the state of the diaphragm blades in the blade chamber in a standby state with the cover plate removed, and FIG. 12 similarly shows the diaphragm blades in the narrowed state. It is shown. The diaphragm blades of this embodiment are composed of three blades, similar to the shutter blades of the second embodiment, and the operation thereof is similar to that of the shutter blades of the second embodiment. First, the configuration of this embodiment will be described. The base plate 31 is made of synthetic resin and forms a blade chamber with a cover plate (not shown), but the illustration of the cover plate is omitted. An opening 31a for the subject optical path is formed in the base plate 31 to the right of the center portion, and the blade chamber side surface between the left end of the base plate 31 and the opening portion 31a is a blade attachment region. Further, the cover plate (not shown) is also provided with an opening for the subject optical path at a position facing the opening 31a. Also in the present embodiment, the opening 31a regulates the photographing optical path. It has become.

  In the base plate 31, three shafts 31b, 31c, 31d and three stoppers 31e, 31f, 31g are erected on the surface on the blade chamber side. An arc-shaped long hole 31 h is formed in the blade attachment region of the base plate 31. A motor 32 is attached to the back surface of the blade attachment region of the base plate 31. The motor 32 of the present embodiment is a motor having the same configuration as the motor of each of the embodiments described above, and includes a rotor 32a that has a permanent magnet and reciprocates only within a predetermined angle range. The drive pin 32b that rotates integrally with the rotor 32a passes through the long hole 31h and extends into the blade chamber.

  The diaphragm blade of the present embodiment disposed in the blade chamber is composed of three blades 33, 34, and 35, and the blade 33 disposed in the middle is larger than the opening 31 a of the main plate 31. It has an opening 33a, a circular hole, and a long hole. The circular hole is rotatably fitted to the shaft 31c, and the long hole is fitted to the drive pin 32b. Therefore, in the case of this blade 33, unlike the blade 24 of the third embodiment, when the drive pin 32b reciprocates, it rotates on the shaft 31c. In addition, the blade 34 disposed between the blade 33 and the base plate 31 has a circular hole, a long hole, and an opening regulating edge 34a, and the circular hole is rotatably fitted to the shaft 31b. The long hole is fitted to the drive pin 32b. Further, the blade 35 disposed between the blade 33 and the cover plate has a circular hole, a long hole, and an opening regulating edge 35a, and the circular hole is rotatably fitted to the shaft 31d. The long hole is fitted to the drive pin 32b. In addition, the amount of rotation of the blades 33, 34, and 35 is different for each blade, as in the second embodiment.

  Next, the operation of this embodiment will be briefly described. FIG. 11 shows an initial state (photographing standby state) of the present embodiment, and the power switch of the camera is turned on. At this time, the stator coil of the motor 32 is not energized. However, as in the case of the above-described embodiments, the rotor 32a is applied with a force that rotates counterclockwise, but since the blades 33 and 34 are in contact with the stoppers 31f and 31e, this state is maintained. Is maintained.

  When the release button is pressed at the time of shooting, whether to shoot with the subject light dimmed or not dimmed is determined according to the photometric result of the photometric device. If it is determined that the image should be taken without being dimmed, the image is taken in the state shown in FIG. 11, and the diaphragm device does not operate at all. On the other hand, when it is determined that the image should be dimmed, the stator coil of the motor 32 is energized and the rotor 32a is rotated clockwise. Therefore, the driving pin 32b rotates the blade 33 and the blade 34 having the opening 33a in the clockwise direction and the blade 35 in the counterclockwise direction to cover the opening 31a. At this time, if the vane 33 is not present, the vane 34 and the vane 35 rotate in opposite directions, so that they may be bent during operation and their tips may be engaged. In the case of the example, such a situation does not occur because the blade 33 exists between the blades 34 and 35.

  The operation performed in this manner is stopped when the blade 33 abuts against the stopper 31g. FIG. 12 shows the stopped state. At this time, the aperture opening is restricted by the opening restriction edge 34 a of the blade 34 and the opening restriction edge 35 a of the blade 35. Therefore, this state is a narrowed state. At this time, the blade 33 covers an upper region of the opening 31a that cannot be covered only by the other two blades 34 and 35. Accordingly, also in the case of the diaphragm device of the present embodiment, the blade 33 having the opening 33a has such a role and a role to prevent the blades 34 and 35 from being engaged during operation as described above. Have both.

  When the state shown in FIG. 12 is obtained in this way, photographing is performed by a shutter device or the like. When shooting is completed, the stator coil of the motor 32 is energized in the opposite direction to the above case. Therefore, the rotor 32a rotates counterclockwise, and the three blades 33 to 35 are rotated in the opposite direction to the above by the drive pin 32b. Then, when the opening 31a is fully opened, immediately after that, the blade 33 contacts the stopper 31f and the blade 34 contacts the stopper 31e, so that the rotation of the rotor 32a and the three blades 33 to 35 stops. . When the energization of the stator coil of the motor 32 is cut off, the initial state shown in FIG. 11 is restored.

  Next, Example 5 will be described with reference to FIGS. 13 and 14. The present embodiment is a filter device, and FIG. 13 shows a photographing standby state of filter blades, and FIG. 14 shows a set state of filter blades. The filter blades of the present embodiment are composed of five blades, like the diaphragm blades in the third embodiment, and the operation thereof is substantially the same as that of the diaphragm blades of the third embodiment. First, the configuration of this embodiment will be described. The base plate 41 is made of synthetic resin, and an opening 41a for a subject optical path is formed on the right side of the center. And the area | region of the blade chamber side which exists between the left end of the baseplate 41 and the opening part 41a is made into the blade | wing attachment area | region.

  In the case of the present embodiment, the cover plate 42 is shown by omitting a part on the left side. The cover plate 42 is attached to the base plate 41 and constitutes a blade chamber between the cover plate 42 and the base plate 41. The cover plate 42 is formed with a subject optical path opening 42a slightly larger than the opening 41a at a position facing the opening 41a. The opening 42a has a region in the lower left direction. A relief portion 42b formed by cutting out the is continuously provided. Accordingly, also in the present embodiment, the opening 41a formed in the base plate 41 regulates the photographing optical path.

  In the base plate 41, six shafts 41b, 41c, 41d, 41e, 41f, and 41g are erected in the blade mounting region, and two columnar stoppers 41h and 41i are erected. The shafts and the tips of the stoppers are inserted into holes formed in the cover plate 42 (not shown). In addition, in the blade mounting region of the base plate 41, an arc-shaped long hole is formed as in the case of the long hole 1m of the base plate 1 in the first embodiment, but the illustration thereof is omitted in FIGS. ing. The cover plate 42 is also formed with a long hole of the same shape (not shown) at a position facing the long hole. Furthermore, the base plate 41 is mounted on the surface opposite to the blade mounting area with a motor having the same configuration as that of each of the above embodiments as a filter blade driving means. FIG. 13 and FIG. A rotor 43 and drive pins 44 are shown. The drive pin 44 passes through the long hole (not shown) of the base plate 41, and the tip thereof is inserted into the long hole (not shown) of the cover plate 42.

  In the blade chamber, filter blades driven by motor drive pins 44 are arranged. The filter blade of the present embodiment is composed of five blades 45 to 49. And the blade | wing 45 arrange | positioned in the middle of those blade | wings has the opening part 45a larger than the opening part 41a of the ground plane 41, and three long holes. Then, the first long hole 45b is fitted to the shaft 41c, the second long hole 45c is fitted to the two shafts 41d and 41e, and the third long hole without a mark is fitted to the drive pin 44. It is combined. Therefore, the blade 45 slides linearly in the length direction of the long holes 45b and 45c when the drive pin 44 reciprocates.

  Of the two blades 46 and 47 disposed between the base plate 41 and the blade 45, the blade 46 disposed on the side of the base plate 41 has a circular hole 46a and a long hole not labeled. In addition, the hole 46a is rotatably fitted to the shaft 41b, and the long hole is fitted to the drive pin 44. The other blade 47 arranged on the blade 45 side has a circular hole 47a, a long hole not labeled, and an opening regulating edge 47b, and the hole 47a is fitted to the shaft 41c. The long hole is fitted to the drive pin 44. When the drive pin 44 reciprocates, these blades 46 and 47 are simultaneously reciprocated in the same direction around the shafts 41 b and 41 c. However, as described above, the blade 47 is more than the blade 46. It is designed to rotate large (fast).

  Further, of the two blades 48 and 49 disposed between the cover plate 42 and the blade 45, the blade 48 disposed on the cover plate 42 side has a circular hole 48a and an unsigned length. A hole and an opening regulating edge 48 b are provided, the hole 48 a is fitted to the shaft 41 f, and the long hole is fitted to the drive pin 44. A part of the ND filter plate 50 is attached to the blade 48 with an adhesive or the like, and can cover the opening formed by the opening restriction edge 48 b and the opening restriction edge 47 b of the blade 47. It is like that. On the other hand, the other blade 49 arranged on the blade 45 side has a circular hole 49a and a long hole not labeled, and the hole 49a is fitted to the shaft 41g to drive the long hole. The pin 44 is fitted. The blades 48 and 49 are simultaneously reciprocated in the same direction around the shafts 41f and 41g when the drive pin 44 is reciprocated. As described above, the blade 48 is more than the blade 49. It is designed to rotate large (fast).

  Next, the operation of this embodiment will be described. In addition, the filter device of the present embodiment can be used for both a silver salt film camera and a digital camera, like the diaphragm devices of the third and fourth embodiments. And since the structure is very similar, the operation is performed in the same manner as in the third embodiment. Therefore, the operation of this embodiment will be briefly described. FIG. 13 shows an initial state (photographing standby state) of the present embodiment, and the power switch of the camera is turned on. At this time, the stator coil of the motor is not energized, but as in the case of each of the above embodiments, the rotor 43 is given a force that rotates counterclockwise, but the blade 45 is a stopper. Since this is in contact with 41h, this state is maintained.

  When the release button is pressed at the time of shooting, whether to shoot with the subject light dimmed or not dimmed is determined according to the photometric result of the photometric device. And when it is judged that it should image | photograph without dimming, imaging | photography is performed with the state shown in FIG. 13, and a filter apparatus does not operate | move at all. On the other hand, if it is determined that the light should be dimmed, the stator coil of the motor is energized and the rotor 43 is rotated in the clockwise direction. Therefore, the middle blade 45 slides linearly in the lower right direction by the drive pin 44, the blades 46 and 47 rotate in the clockwise direction, and the blades 48 and 49 rotate in the counterclockwise direction.

  If the blade 45 is not provided in this operation stroke, the tip of the blades 46 and 47 and the tip of the blades 48 and 49 may collide and mesh with each other. In this embodiment, the blade 45 This situation does not occur. And this operation | movement stops when the blade | wings 45 and 46 contact | abut to the stopper 41i. FIG. 14 shows the stopped state. At this time, the opening restricting edge 47b of the blade 47 and the opening restricting edge 48b of the blade 48 form an opening considerably smaller than the opening 41a. However, the opening is covered with an ND filter plate 50 attached to the blade 48. Therefore, this state can be said to be a set state for the filter device. At this time, the blade 45 covers the upper right portion of the opening 41a that is not covered by the other four blades 46 to 49. Therefore, also in the case of the present embodiment, the blade 45 has such a role and the role of preventing the meshing during the operation as described above.

  In this way, when the state shown in FIG. 14 is reached, photographing is performed by a shutter device or the like. When the photographing is completed, the motor stator coil is energized in the opposite direction to the above case. Therefore, the rotor 43 rotates counterclockwise, and the five blades 45 to 49 are operated in the direction opposite to the above by the drive pin 44. Then, when the opening 41a is fully opened, immediately after that, the blade 45 comes into contact with the stopper 41h, and the operation of the rotor 43 and the five blades 45 to 49 is stopped. When the motor stator coil is de-energized, the initial state shown in FIG. 13 is restored.

  In each of the above embodiments, a current control type motor called a moving magnet type motor or the like is used as an actuator. However, the driving means of the present invention is not limited to such a motor. Other electromagnetic driving means such as a step motor and an electromagnetic plunger may be used. These electromagnetic driving means include a mediating member such as a lever, and a driving pin may be provided on the mediating member. Therefore, the driving means of the present invention does not necessarily have to be attached to the ground plate outside the blade chamber as in each of the above-described embodiments, and is attached to a space formed between the ground plate and the cover plate. Each blade may be actuated.

FIG. 3 is an exploded perspective view of the shutter device according to the first embodiment. It is the top view which removed the cover board from the shutter apparatus of FIG. 1, and showed the shutter blade fully open state. FIG. 3 is a plan view showing the state immediately after the start of the shutter blade closing operation in the same manner as in FIG. 2. FIG. 3 is a plan view showing a state substantially in the middle of the closing process of the shutter blades in the same manner as in FIG. 2. FIG. 3 is a plan view showing a state immediately before the end of the shutter blade closing operation in the same manner as in FIG. 2. It is the top view which showed the closed state of the shutter blade | wing similarly to FIG. It is the top view which showed the fully open state of the shutter apparatus of Example 2, and removed the cover board. FIG. 9 is a plan view of Example 2 showing a closed state of the shutter blades in the same manner as in FIG. 7. It is the top view which showed the standby state of the aperture_diaphragm | restriction apparatus of Example 3 by removing the cover board. It is the top view of Example 3 which showed the narrowing-down state of the aperture blade similarly to FIG. It is the top view which showed the standby state of the aperture_diaphragm | restriction apparatus of Example 4 by removing the cover board. It is the top view of Example 4 which showed the narrowing-down state of the aperture blade similarly to FIG. It is the top view which showed the standby state of the filter apparatus of Example 5. It is the top view of Example 5 which showed the set state of the filter blade | wing.

Explanation of symbols

1,11,21,31,41 Ground plate 1a, 2a, 4a, 11a, 13a, 21a, 24a, 31a, 33a, 41a, 42a, 45a Openings 1b-1g, 11b-11d, 21b-21g, 31b-31d , 41b to 41g Shaft 1h to 1k, 11e to 11g, 21h, 21i, 31e to 31g, 41h, 41i Stopper 1m, 2m, 4b to 4d, 5b, 6b, 7b, 8b, 11h, 24b, 24c, 31h, 45b , 45c Long hole 2, 42 Cover plate 2b-2k, 5a, 6a, 7a, 8a, 25a, 26a, 27a, 28a, 46a, 47a, 48a, 49a Hole 3, 12, 32 Motor 3a, 12b, 23, 32b , 44 Drive pin 4-8, 13-15, 24-28, 33-35, 45-49 Blade 12a, 22, 32a, 43 Rotor 26b , 28b, 34a, 35a, 47b, 48b Opening restriction edge 42b Escape part 50 ND filter plate

Claims (6)

A base plate having an opening for an optical path and having a blade chamber side surface between one end in the longitudinal direction of the optical path and the opening for the optical path as a blade attachment region, and the base plate attached to the base plate A cover plate constituting a blade chamber between the drive plate , a drive means having a reciprocating drive pin and attached to the one end side in the longitudinal direction of the base plate , and for the optical path It has an opening larger than the opening and a long hole into which the drive pin is fitted, and is attached to the blade attachment area so as to be able to reciprocate. The drive pin advances and retreats to the optical path opening. a first blade comprising a single vane rotatably prior Symbol blade attachment region is disposed between the base plate have a long hole into which the drive pin is fitted first blade the optical path by the attached in which said drive pin A second blade comprising at least one blade is moved back and forth in the opening, before being disposed between the cover plate have a long hole into which the drive pin is fitted first blade A third blade comprising at least one blade that is rotatably attached to the blade attachment region and is rotated in a direction opposite to the second blade by the drive pin to be advanced and retracted to the optical path opening; When the second blade and the third blade are caused to enter the optical path opening by the drive pin , when viewed from the optical axis direction , the second blade and the third blade start to overlap each other from the tip side, The optical path that is not covered by the second blade and the third blade when the first blade is brought into the optical path opening by the drive pin and stopped together with the second blade and the third blade. Area around the opening Camera blade drive device being characterized in that so as to cover.   The camera blade driving device according to claim 1, wherein the first blade is slidably attached to the blade attachment region.   The camera blade driving device according to claim 1, wherein the first blade is rotatably attached to the blade attachment region. Before SL drive means is a reciprocally rotatable motor, by reciprocating the drive pin, wherein the first blade, the second blade, and so as to activate said third blade at the same time The camera blade driving device according to claim 1. An opening restricting edge is formed in one blade constituting the second blade and one blade constituting the third blade, and the drive pin provides an opening for the optical path. 5. The blade driving for a camera according to claim 1, wherein when the light is made to enter, an opening smaller than the opening for the optical path is formed by both opening restriction edges. apparatus.   One of the two blades forming the opening regulating edge is a blade disposed adjacent to the base plate or the cover plate, and the blade has a surface on the side of the adjacent base plate or the cover plate. In addition, an ND filter plate is attached so as to cover the opening when the small opening is formed, and the ground plate or the cover plate adjacent to the blade is connected to the ND filter plate when the blade is operated. 6. The blade driving device for a camera according to claim 5, wherein an escape portion is formed so as not to contact.