JP2016061831A - Focal plane shutter, camera with focal plane shutter, camera unit with focal plane shutter, and camera with camera unit with focal plane shutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter fitted to a camera body part with high precision of parallelism of a slit formation side of a blade to a slit formation pixel array without reference to whether individual members constituting a curtain have an error in molding or performance error.SOLUTION: There is provided a focal plane shutter such that a bottom plate 1 comprising blades forming a slit with an electronic curtain is fitted to a bottom plate receiving part 50 having first, second pins 51, 52, the bottom plate comprising: a shaft hole 1h where a first pin is fitted rotatably; a long hole 1i in which a second pin can be loosely fitted in a rotating direction of the bottom plate; an eccentric pin 31; a position adjustment hole 33 which can change in relative position to the bottom plate, and abut on a second pin on both side faces by fitting the second pin fitted loosely in the long hole; an adjustment mechanism 30 which adjusts the relative position of the position adjustment hole 33 to the bottom plate by slightly rotating the ground place around the shaft hole; and fixing means 40 of fixing the relative position between the position adjustment hole and the bottom plate at a position where the fitting angle of the bottom plate to the bottom plate receiving part is finely adjusted.SELECTED DRAWING: Figure 1

Description

  The present invention includes a focal plane shutter and a focal plane shutter, such as a front curtain electronic shutter, in which one curtain forming a slit during exposure is composed of an electronic curtain and the other curtain is composed of shutter blades. The present invention relates to a camera, a camera unit including a focal plane shutter, and a camera including a camera unit including a focal plane shutter.

  Among focal plane shutters mounted on digital cameras (especially single-lens reflex cameras, mirrorless machines, etc.), there is a type of shutter in which one curtain is digitized using an image sensor and the other curtain is constituted by shutter blades. . In this type of shutter, the side of the slit forming blade on the slit forming side (referred to as the slit forming side in the present application) of the shutter blades constituting the other curtain with respect to the image frame is the slit forming of the image sensor. It is designed to be exposed by running so as to be parallel to the pixel column.

  In manufacturing a camera equipped with this type of focal plane shutter, for example, as shown in the following Patent Document 1, the rear curtain is provided at a plurality of locations on the camera body where the image sensor constituting one curtain is provided. A base plate of a focal plane shutter having shutter blades to be configured is attached with a screw.

  Conventionally, in a camera of a type in which a base plate of a shutter is screwed to a plurality of locations of a camera main body, such as a camera having a focal plane shutter described in Patent Document 1, a plurality of pins are provided on the camera main body side. In addition, a configuration in which a plurality of shaft holes provided at corresponding positions on the ground plane of the focal plane shutter is provided is used. When assembling the camera, when attaching the base plate of the shutter to a plurality of locations of the camera main body with screws, a plurality of pins provided at the corresponding positions on the base plate of the focal plane shutter are provided on a plurality of pins provided on the camera main body side. By fitting these shaft holes, the position of the base plate of the focal plane shutter in the camera main body is fixed.

JP 2004-38116 A

The performance of this type of shutter is determined by the parallelism of the slit forming side of the slit forming blade with respect to the slit forming pixel array of the image sensor. However, in recent years, in order to improve the image quality, it is required to further improve the parallelism of the slit forming side with respect to the slit forming pixel array of the image sensor.
However, the image sensor that forms the electronic curtain can be easily provided in the camera body by adjusting the parallelism of the slit-formed pixel rows so as to be in a highly accurate state. On the other hand, the inclination of the curtain of the focal plane shutter can be confirmed for the first time when the individual components are assembled, and errors and performance errors in molding the individual members constituting the focal plane shutter curtain. An inclination may occur in the slit forming side of the slit forming blade due to an attachment error to the base plate. Disassembling individual members in the focal plane shutter to adjust the error is extremely difficult because it complicates work, increases work time, and increases the cost burden.
For this reason, in the configuration in which the base plate is positioned on the camera body by fitting the shaft holes of the base plate provided with the shutter blades to the plurality of pins of the camera-side mounting portion provided with the image pickup device, slit formation of the image pickup device is performed. It is very difficult for mass production to attach the base plate to the camera body while maintaining the parallelism with high accuracy without tilting the slit forming side of the slit forming blade with respect to the pixel row. In addition, once the base plate is attached to the camera body, it is impossible to correct the inclination of the slit forming side of the slit forming blade with respect to the slit forming pixel row of the image pickup device caused by the error.

  The present invention has been made in order to solve such problems, and the object of the present invention is to eliminate errors and performance errors in molding individual members constituting the curtain of the focal plane shutter, and to the ground plane. Regardless of the mounting error, the parallelism of the slit forming side of the slit forming blade with respect to the slit forming pixel row of the image sensor can be made in a highly accurate state, and the base plate can be attached to the camera body, which is excellent in mass productivity. To provide a focal plane shutter, a camera including a focal plane shutter, a shutter unit including a focal plane shutter, and a camera including a shutter unit including a focal plane shutter.

  In order to achieve the above object, a focal plane shutter according to the present invention has a ground plane provided with shutter blades capable of forming a slit in combination with an electronic curtain during exposure operation, and the ground plane is at least a first and a A focal plane shutter that is attached to a base plate receiving portion having a second pin via the first and second pins, and the shaft is rotatably fitted to the first pin. A hole, a long hole in which the second pin that moves relative to the rotation direction within a predetermined rotation angle range of the ground plane around the shaft hole can be loosely fitted, and relative to the ground plane A position adjusting hole that is configured to be capable of various position fluctuations and that fits the second pin loosely fitted into the elongated hole and abuts the second pin on both side surfaces on the rotational direction side of the base plate; The shaft hole is rotated by the rotation of the eccentric pin. A ground plane mounting angle adjusting mechanism for finely adjusting a mounting angle to the ground plane receiving portion, which adjusts a relative position of the position adjustment hole with the ground plane by slightly rotating the ground plane as a center, and the ground plane And a fixing means for fixing a relative position of the position adjustment hole with the ground plate at a position where the mounting angle of the ground plate to the ground plate receiving portion is finely adjusted via an attachment angle adjusting mechanism. .

  In the focal plane shutter of the present invention, the ground plane mounting angle adjusting mechanism includes the eccentric pin rotatably attached to the ground plate, the position adjusting hole, and rotation of the eccentric pin. A movable plate that slightly rotates the main plate around the shaft hole while changing a relative position; and a movable plate that is provided on the ground plate, and the movable plate is arranged at a predetermined position of the main plate around the shaft hole. A guide groove that can be guided in a linear direction substantially along the rotation direction within a rotation angle range, and provided in the movable plate, guides the eccentric pin along a direction perpendicular to the guide direction of the guide groove. It is preferable to have a possible eccentric pin guide hole.

  In the focal plane shutter of the present invention, it is preferable that the shaft hole of the base plate is provided on a straight line passing through the center of the opening of the base plate.

  Further, the camera of the present invention is configured such that the mounting angle of the ground plate to the ground plate receiving portion is finely adjusted via the ground plate mounting angle adjusting mechanism, and the ground plate of the position adjusting hole is fixed via the fixing means. Each of the focal plane shutters as described above having a fixed relative position, and an image pickup device, and a main body provided with the base plate receiving portion for mounting the base plate of the focal plane shutter.

  In the camera unit of the present invention, the base plate of the position adjustment hole may be provided via the fixing means at a position where the mounting angle of the base plate to the base plate receiving portion is finely adjusted via the base plate attachment angle adjusting mechanism. Each of the focal plane shutters as described above having a fixed relative position, and a substrate having an imaging device and provided with the base plate receiving portion for mounting the base plate of the focal plane shutter.

  The digital camera of the present invention includes the camera unit as described above.

According to the focal plane shutter, the camera having the focal plane shutter, the shutter unit having the focal plane shutter, and the camera having the shutter unit having the focal plane shutter according to the present invention, the shaft hole is centered by the rotation of the eccentric pin. A base plate mounting angle adjustment mechanism for finely adjusting the mounting angle to the base plate receiving portion that adjusts the position of the position adjustment hole relative to the base plate by slightly rotating the base plate is provided. By rotating the eccentric pin without disassembling the member, the mounting angle of the base plate to the base plate receiving portion can be finely adjusted, and the slit forming side of the slit forming blade with respect to the slit forming pixel row of the image sensor The accuracy of parallelism can be improved.
In addition, since there is a fixing means for fixing the relative position of the position adjustment hole with the base plate at the position where the mounting angle of the base plate to the base plate receiving portion is finely adjusted via the base plate mounting angle adjustment mechanism, The relative position of the adjustment hole with the main plate can be fixed, and even if the base plate is subsequently removed from the main plate receiving portion, the mounting angle of the main plate to the main plate receiving portion can be maintained.
For this reason, as a pre-process for incorporation into the camera, a base plate with shutter blades is attached to the base plate receiving part provided on the base unit dedicated to assembling the shutter unit, and the mounting angle of the base plate to the base plate receiving part is finely adjusted and fixed. After fixing the relative position of the position adjustment hole with the base plate by means, a series of steps such as detaching from the base plate provided with the base plate receiving portion is repeated, and then in the step of incorporating into the camera, the base plate provided with the shutter blades Can be mass-produced with a shutter unit capable of maintaining the parallelism of the slit-forming side of the slit-forming blade with respect to the slit-forming pixel row of the image sensor with a high degree of accuracy. .
As a result, according to the present invention, the slit for the slit formation pixel row of the image sensor regardless of the molding error or performance error of individual members constituting the curtain of the focal plane shutter, or the mounting error to the ground plane. It is possible to attach the main plate to the camera body with the parallelism of the slit forming sides of the forming blades being in a highly accurate state, and has a mass plane focal plane shutter, a camera equipped with a focal plane shutter, and a focal plane shutter. A camera including a shutter unit including a shutter unit and a focal plane shutter is obtained.

It is a top view which shows the state which attached the focal plane shutter concerning one Example of this invention to the baseplate receiving part. It is a disassembled perspective view of the focal plane shutter of FIG. It is DD expanded sectional drawing of one principal part in FIG. It is EE expanded sectional drawing of the other principal part of FIG. It is FF expanded sectional drawing of the other principal part of FIG. It is a top view which shows the state which inclined the predetermined angle in the counterclockwise direction with respect to the ground plane receiving part of the ground plane of FIG. It is a top view which shows the state which inclined the base plate of FIG. 1 by the predetermined angle clockwise with respect to the base plate receiving part.

  Embodiments of the present invention will be described with reference to the illustrated examples.

  First, the configuration of an embodiment of the present invention will be described mainly with reference to FIGS. 1 and 2. FIG. 1 shows a state in which a focal plane shutter according to an embodiment of the present invention is attached to a base plate receiving portion. FIG. 2 is an exploded perspective view of the focal plane shutter and base plate receiving portion of FIG. In the description of this embodiment, when the focal plane shutter of this embodiment is incorporated in a camera, the front side (front side) in FIG. 1 is the subject side (photographing lens side), and the back side in FIG. The description will be made on the assumption that it is on the element side. However, as is well known, in the case of a digital camera, the front side in FIG. 1 may be the image sensor side and the back side in FIG. 1 may be the subject side. In the description of the embodiments of the present invention, a configuration of a mechanical shutter that uses an electronic shutter as a front curtain and opens and closes only a rear curtain via a driving member is used.

First, prior to the description of the configuration of the main part of the present embodiment, the configuration for running the shutter blades will be described.
In FIG. 1, an opening 1 a for exposure is formed in the central portion of the shutter base plate 1 that is substantially to the right. An auxiliary base plate 2 is attached to the back side of the shutter base plate 1, and a blade chamber is formed between the shutter base plate 1 and the auxiliary base plate 2. The auxiliary base plate 2 is also formed with an opening 2a having substantially the same shape and size as the opening 1a. For convenience, the auxiliary base plate 2 is omitted in FIGS. 6 and 7. The shutter base plate 1 of this embodiment is made of synthetic resin.

  In the shutter base plate 1, an arc-shaped long hole 1b is formed in a region on the left side of the opening 1a. A well-known buffer member (not shown) is attached to the lower end of the long hole 1b. Further, the auxiliary base plate 2 is formed with a long hole 2b having substantially the same shape where it overlaps the long hole 1b.

  Shafts 1c and 1d are erected on the front side of the shutter base plate 1, and shafts 1f and 1g are erected on the back side of the shutter base plate 1, respectively. Of these, the shaft 1f is erected concentrically with the shaft 1c.

  In addition to this, a plurality of pillars are erected on the front surface side of the shutter base plate 1, and a support plate 23 and a printed wiring board (not shown) are provided at the front ends thereof, and the support plate 23 is connected to the shutter base plate. It is attached on one side. On the side of the shutter base plate 1 of the support plate 23, an iron core member having a substantially U shape and having the tip of two legs as a magnetic pole part, a coil, and one leg of the iron core member wound around the coil. An electromagnet 4 composed of a bobbin fitted to the part is attached. For convenience, in FIG. 6 and FIG. 7 in addition to FIG. 1, only the iron core member is denoted by reference numeral 4 for the electromagnet.

A synthetic resin driving member 11 is rotatably attached to the shaft 1 c of the shutter base plate 1.
The drive member 11 has a driven portion 11a, a drive pin 11b, and an attachment portion 11c. The drive pin 11 b is inserted into the long hole 1 b of the shutter base plate 1. The drive pin 11b is connected to the blade in the blade chamber at the tip side as described later, and the most advanced portion is inserted into the long hole 2b formed in the auxiliary base plate 2.
As is well known, the drive member 11 is urged to rotate clockwise (in the direction of arrow A about the axis 1c in FIG. 1) by an urging force of a drive spring (not shown).

The attachment portion 11c of the drive member 11 is formed thick on the subject side, and accommodates therein an iron piece member 13 and a compression spring (not shown).
The iron piece member 13 has a disk-shaped head portion 13b at one end of the shaft portion 13a, and an iron piece portion 13c is attached to the other end. Moreover, the iron piece member 13 is urged | biased so that the iron piece part 13c may protrude from the inside of the attachment part 11c with the compression spring which is not shown in figure by the shaft part 13a in the attachment part 11c.

  A ratchet member 24 is rotatably attached to the shaft 1c of the shutter base plate 1 as shown in FIG. The ratchet member 24 has ratchet teeth on the outer peripheral portion, and the tip of a ratchet claw (not shown) formed on the support plate 23 is engaged with the ratchet teeth, thereby preventing the ratchet member 24 from rotating in the clockwise direction. It has become so.

  One end of the drive spring is hooked on a spring hooking portion (not shown) of the driving member 11 and the other end is hooked on a spring hooking portion (not shown) of the ratchet member 24 so as to rotate the driving member 11 clockwise. Energized.

A synthetic resin set member 14 is rotatably attached to the shaft 1 d of the shutter base plate 1. The set member 14 includes an attachment portion (not shown) in which a link lever (not shown) of a set drive mechanism portion (not shown) provided on the camera main body side is rotatably attached, and the drive member 11 being pushed. And a pushing portion 14b for pushing the portion 11a.
Moreover, the set member 14 is urged | biased so that it may rotate counterclockwise (arrow B direction centering on the axis | shaft 1d in FIG. 1) by the return spring which is not shown in figure.

  The blades disposed between the shutter base plate 1 and the auxiliary base plate 2 have one end with respect to the shaft 1f of the shutter base plate 1 and one end of the shutter base plate 1 with respect to the shaft 1g. The arm 18 is rotatably mounted, and is composed of three blades 19, 20, and 21 that are pivotally supported in turn toward the other end that is the free end thereof. It has become. As is well known, the tip of the drive pin 11 b of the drive member 11 is fitted in a long hole 17 a formed in the arm 17.

  Further, a set spring is fitted on a shaft (not shown) of the shutter base plate 1, and one end of the set spring is hooked on a spring hook portion (not shown) of the shutter base plate 1, and the other end is placed in the hole 18 a of the arm 18. The arm 18 is urged so as to rotate counterclockwise (in the direction of arrow C about the axis 1g in FIG. 1). Therefore, this set spring urges the drive member 11 to indirectly rotate counterclockwise via the blades, but the urging force is applied to the drive member 11 as shown above. It is weaker than the biasing force of the drive spring that is not. In the case of this set spring, it plays the role of a well-known blade backlash spring (a spring hung on the arm 18 to make the posture of the slit forming blade at the exposure operation start position constant) It does not matter even if it is configured to hang directly on the member 11. For convenience, arrows A to C are shown only in FIG.

  The driving member 11 is rotated counterclockwise against the urging force of a known driving spring (not shown) by the pushed portion 11a being pushed by the pushing portion 14b by the clockwise rotation of the set member 14. Then, the iron piece part 13c of the iron piece member 13 contacts the magnetic pole part of the iron core member 4 of the electromagnet. The drive member 11 is rotated counterclockwise by the urging force of the set spring. When the drive pin 11b of the drive member 11 comes into contact with the upper end of the long hole 1b, the three blades 19 and 20 are rotated. , 21 are stopped in a folded state and retracted from the opening 1a.

An exposure operation of the camera provided with the shutter having such a configuration will be described.
When the release button of the camera is pressed while observing the subject image with the electronic finder in the set completion state, the electromagnet is in an excited state before actual shooting (exposure operation) is started, and the iron piece portion 13c of the iron piece member 13 is started. Is attracted and held by the magnetic pole portion of the iron core member 4.
Next, the set drive mechanism section releases the force that rotates the set member 14 in the clockwise direction via the link lever. Then, the set member 14 is rotated counterclockwise by an urging force of a return spring (not shown) and returned to the initial position.
In the initial stage of the return operation, the pressing member 14b of the set member 14 moves away from the driven portion 11a of the driving member 11, so that the driving member 11 is rotated clockwise by the biasing force of a driving spring (not shown). However, since the iron piece member 13 is attracted and held by the iron core member 4, the attachment portion 11 c comes into contact with the head portion 13 b of the iron piece member 13 and is stopped when it is slightly rotated.
The three blades 19 to 21 are slightly moved downward by such slight rotation of the driving member 11, but are stopped before the opening 1 a is covered.

After the set member 14 returns to the initial position, the electronic shutter is turned on, and the electronic control circuit controls the image sensor to start capturing a still image. At this time, the slit formation pixel row of the image sensor that functions as an electronic shutter (that is, the pixel row located at the uppermost position in the region functioning as the electronic curtain in the image sensor) moves downward in parallel. Then, when a predetermined time determined corresponding to the brightness of the subject elapses, the electromagnet is demagnetized.
When the electromagnet is demagnetized, the attractive force of the iron core member 4 with respect to the iron piece member 13 is lost, and the driving member 11 is rapidly rotated clockwise by the biasing force of the driving spring. At that time, since the drive member 11 is rotated clockwise against the urging force of the set spring, the three blades 19 to 21 move in parallel downward while reducing the overlap between adjacent blades. The opening 1a is closed at the lower edge of the slit forming blade 21 (that is, the slit forming side). FIG. 1 shows a state at one point in time when a slit is formed by the slit-forming pixel row of the image sensor during the exposure operation, the slit-forming side of the slit-forming blade 21 and the opening 1a. In FIG. 1, the shaded area is an area of the electronic curtain that functions by the image sensor, and the upper side of the area indicates the slit-formed pixel row.

  From the state of FIG. 1, the drive member 11 continues to rotate in the clockwise direction, and the drive pin 11b comes into contact with a buffer member (not shown) provided at the lower end of the long hole 1b. When the bounce of the drive member 11 stops, the exposure operation ends, and the drive member 11 and the blades stop operating. Further, almost at the same time as the contact of the drive pin 11b of the drive member 11 with the buffer member, the slit forming pixel row of the image sensor functioning as an electronic curtain moves to the lowest side, and the electronic shutter is turned off.

When the exposure operation is completed, the set operation is started. The setting operation to the blades is performed by rotating the setting member 14 in the clockwise direction against the urging force of the return spring (not shown) by the set driving mechanism.
When the setting operation to the blade is started, the pushing portion 14b of the setting member 14 pushes the pushed portion 11a of the driving member 11, and the driving member 11 is countered against the biasing force of the driving spring (not shown). Start rotating clockwise.
Thereafter, the set member 14 continues to rotate in the clockwise direction, so that the driven member 11 is counterclockwise against the urging force of the drive spring (not shown) by the pushed portion 11a being pushed by the pushed portion 14b. Then, the iron piece portion 13c of the iron piece member 13 attached to the drive member 11 contacts the magnetic pole portion of the iron core member 4 of the blade electromagnet.
Thereafter, the set member 14 is slightly rotated and stopped at the set position.

The drive member 11 starts to rotate counterclockwise by the biasing force of the set spring. The three blades 19 to 21 move upward while increasing the overlap between adjacent blades, and open the opening 1a.
Further, the drive member 11 continues to rotate counterclockwise. The drive member 11 rotates counterclockwise, and the drive pin 11b contacts the upper end of the long hole 1b. The return operation of the blades in the set direction with the counterclockwise rotation of the drive member 11 ends, and the operations of the drive member 11 and the blades stop.
In the driving member 11, the three blades 19 to 21 are held in a state where the opening 1a is opened by the urging force of the set spring.

  The set operation of the present embodiment is performed by rotating the set member 14 against the urging force of a return spring (not shown) via the link lever of the set drive mechanism as described above. However, the focal plane shutter of the present invention is not limited to such a configuration. As is well known, it may be configured to be pushed and rotated directly by a member on the camera body side. The return spring for returning the set member 14 to the initial position may be hung on the set member 14 as in this embodiment, but may be hung on the link lever of the set drive mechanism.

Further, although the present embodiment is configured as a direct type focal plane shutter, it may be a locking type focal plane shutter. A plurality of driving members for driving the shutter blades may be configured.
Further, the focal plane shutter of the present embodiment is not limited to the above configuration, and has a ground plane provided with shutter blades that can form a slit in combination with the electronic curtain during exposure operation, and the ground plane is at least Any configuration may be used as long as it can be attached to the main plate receiving portion including the first and second pins via the first and second pins.

Next, the structure of the principal part of a present Example is demonstrated.
The ground plane receiving unit 50 shown in FIG. 1 is a position adjusting jig for adjusting the parallelism of a slit forming side in a camera body unit (not shown) or a slit blade to be described later with respect to a slit forming pixel array of an image sensor. It is provided in the tool. An opening 53 having substantially the same shape and size as the opening 1 a of the shutter base plate 1 is formed in the base plate receiving portion 50. A first pin 51 is provided at a position on the straight line passing through the center of the opening 53, which is an upper part of the opening 53 of the main plate receiving part 50. A second pin 52 is provided at a position on a straight line passing through the center of the opening 53, which is a lower portion of the opening 53 of the main plate receiving part 50. The first pin 51 and the second pin 52 are each formed in a shape in which two types of columnar members having different diameters are combined, and the respective leading end portions 51a and 52a are configured by small-diameter columnar members. ing. In FIG. 1, 51b and 52b are large diameter parts. Note that the image sensor provided in the ground plane receiving portion 50 is designed so that the slit-formed pixel row in FIG. 1 is parallel to the side in the longitudinal direction of the opening 53.

A shaft hole 1h is provided at an upper portion of the opening 1a of the shutter base plate 1 shown in FIG. 1 on a straight line passing through the center of the opening.
The shaft hole 1h is formed so as to be rotatably fitted to the tip portion 51a of the first pin 51 provided in the main plate receiving portion 50. An elongate hole 1i is provided in a lower portion of the opening 1a of the shutter base plate 1 at a position on a straight line passing through the center of the opening.
The long hole 1i can loosely fit a part of the distal end portion 52a and the large diameter portion 52b of the second pin 52 provided in the base plate mounting portion 50, and the shutter base plate 1 has a predetermined center around the shaft hole 1h. When the rotation is within the rotation angle range, the relative position of the second pin 52 in the elongated hole 1i can be changed along the rotation angle. As shown in FIG. 4, the long hole 1 i includes a thick groove portion 1 i-1 in which a front end portion 52 a and a part of the large diameter portion 52 b of the second pin 52 can be loosely fitted from the back side of the shutter base plate 1, and the shutter base plate 1. And a thin hole portion 1i-2 into which only the tip portion 52a of the second pin 52 can be loosely fitted toward the front surface side, and the bottom surface of the large groove portion 1i-1 when the second pin 52 is inserted. Is in contact with the surface of the large-diameter portion 52b. The long hole 1i is composed only of the small-diameter portion 1i-2, and the surface around the small-diameter portion 1i-2 on the back side of the shutter base plate 1 when the second pin 52 is inserted is the large-diameter portion 52b. You may make it contact with the surface.

Further, in the lower portion of the opening 1a of the shutter base plate 1 shown in FIG. 1, a position adjustment hole 33, a base plate attachment angle adjustment mechanism 30 for finely adjusting the attachment angle to the base plate receiving portion 50, and a screw member An insertion hole 36 is provided.
The ground plane mounting angle adjusting mechanism 30 includes an eccentric pin 31, a movable plate 32, a guide groove 34, and an eccentric pin guide hole 35.
The eccentric pin 31 has a shaft portion 31a and a head portion 31b provided at an eccentric position, and passes through the eccentric pin guide hole 35 as shown in FIG. 3, so that the shaft portion 31a is a mounting hole of the main plate 1. 1j is rotatably mounted. The head 31b is formed with a groove 31c having a predetermined shape (in this embodiment, it is a minus shape, but may be a plus shape). And the eccentric pin 31 is rotated by putting the front-end | tip part of the driver which is not shown in a groove | channel, and rotating a driver.
The position adjustment hole 33 is provided in the movable plate 32, fits the distal end portion 52a of the second pin 52, and contacts the distal end portion 52a of the second pin 52 on both side surfaces on the rotational direction side of the shutter base plate 1. It is formed to touch.
The guide groove 34 is provided in the shutter base plate 1 so that the movable plate 32 can be guided in a linear direction substantially along the rotation direction within a predetermined rotation angle range of the shutter base plate 1 around the shaft hole 1h. Is formed.
The eccentric pin guide hole 35 is provided in the movable plate 32 so that the eccentric pin 31 can be guided along a direction perpendicular to the guide direction of the guide groove 34.
The screw member insertion hole 36 is provided in the movable plate 32, and as shown in FIG. 5, a shaft portion 40a of the screw member 40 described later can be inserted, and the width is smaller than the head portion 40b of the screw member 40. The guide groove 34 is formed in an elongated hole shape along the guide direction.
The movable plate 32 is coupled with the eccentric pin 31, the guide groove 34, and the eccentric pin guide hole 35 while changing the relative position of the position adjustment hole 33 with the shutter base plate 1 by the rotation of the eccentric pin 31. A function of slightly rotating the shutter base plate 1 around the shaft hole 1h is provided.

Further, the shutter base plate 1 fixes the relative position of the position adjustment hole 33 to the shutter base plate 1 at a position where the mounting angle of the shutter base plate 1 to the base plate receiving portion 50 is finely adjusted via the base plate mounting angle adjusting mechanism 30. A screw member 40 is provided as a fixing means.
The screw member 40 is obtained by inserting the shaft portion 40a through the screw member insertion hole, screwing it into the screw groove 1k formed in the shutter base plate 1, and sandwiching the movable plate 32 between the head base 40b and the shutter base plate 1. The relative position of the position adjustment hole 33 with respect to the shutter base plate 1 can be fixed.

  Next, a method for adjusting the mounting position of the shutter base plate 1 to the first pin 51 and the second pin 52 of the base plate receiving portion 50 using the focal plane shutter of this embodiment configured as described above will be described. Here, the ground plate receiving portion 50 is not a camera main body portion but is provided on a position adjusting jig.

First, the shaft hole 1h of the shutter base plate 1 is fitted to the tip portion 51a of the first pin 51 of the base plate receiving portion 50, and the tip portion 52a of the second pin of the base plate receiving portion 50 is inserted into the long hole of the shutter base plate 1. 1i is inserted into the position adjusting hole 33.
Next, the eccentric pin 31 is rotated by a predetermined amount in a predetermined direction, and the shutter base plate 1 is slightly rotated around the shaft hole 1h while changing the relative position with the shutter base plate 1.

  More specifically, for example, it is assumed that the eccentric pin 31 is rotated about 90 degrees counterclockwise from the state of FIG. Then, the eccentric pin 31 moves downward while being guided by the eccentric pin guide hole 35. At this time, since the surface opposite to the shaft portion of the eccentric pin 31 pushes the left side surface of the eccentric pin guide hole 35, the movable plate 32 is moved in the left direction in the guide groove 34, and the second pin 52 The position adjustment hole 33 into which the tip 52a is inserted moves in the left direction. Here, the second pin 52 is fixed to the main plate receiving portion 50. Therefore, as shown in FIG. 6, the shutter base plate 1 rotates by a predetermined angle (+ α °) counterclockwise around the shaft hole 1h.

  Further, for example, assume that the eccentric pin 31 is rotated about 90 degrees clockwise from the state of FIG. Then, the eccentric pin 31 moves downward while being guided by the eccentric pin guide hole 35. At this time, since the surface opposite to the shaft portion of the eccentric pin 31 presses the right side surface of the eccentric pin guide hole 35, the movable plate 32 is moved rightward in the guide groove 34, and the second pin 52 The position adjustment hole 33 into which the tip 52a is inserted moves in the right direction. Here, the second pin 52 is fixed. Therefore, as shown in FIG. 7, the shutter base plate 1 rotates by a predetermined angle (−α °) clockwise around the shaft hole 1h.

  By such a predetermined amount of rotation of the eccentric pin 31 in a predetermined direction, the movable plate 32 is moved in the left-right direction, and the shutter base plate 1 is rotated by a predetermined angle around the shaft hole 1h. Then, the attachment angle of the shutter base plate 1 to the base plate receiving portion 50 is finely adjusted. The fine adjustment of the mounting angle is performed by measuring the parallelism of the slit-forming side of the slit-forming blade (here, the lower edge of the shutter blade 21) with the slit-forming pixel row of the image pickup element in the ground plane receiving portion 50. Perform while measuring using.

In addition, as a parallelism measurement means, the following are used, for example. In addition, as a slit formation pixel row | line | column of an image pick-up element, the design value on the basis of the lower side of the opening part 53 of the ground-plate receiving part 50 shown in FIG. 1 is used. First, the infrared LED and the infrared light receiving element are arranged at two locations on a virtual line at a predetermined position parallel to the slit forming pixel row of the imaging element in the ground plane receiving unit 50. Furthermore, a recording device for recording the time when the infrared light receiving element receives light is also provided. The shutter blades of the shutter unit attached to the main plate receiving portion 50 are caused to travel, and the time when the slit forming blades 21 reflect the respective infrared LEDs and are received by the respective infrared light receiving elements is measured. Then, according to the magnitude of the time difference in which the infrared light is first received by the two infrared light receiving elements, the slit forming side of the slit forming blade (here, the lower end edge of the shutter blade 21) in the main plate receiving unit 50 The parallelism with the slit formation pixel row of the image sensor is measured. In addition, if the parallelism with the slit formation pixel row | line | column of the image pick-up element in the base plate receiving part 50 of the slit formation side of a slit formation blade | wing can be measured, it is not limited to the structure mentioned above. For example, the infrared LED is provided on the front side of FIG. 1, and the slit forming blades shield each infrared LED and measure the time when the light reception by each infrared light receiving element is blocked. The parallelism of the slit forming side of the slit forming blade with the slit forming pixel array of the image sensor in the ground plane receiving unit 50 is measured according to the magnitude of the time lag when the infrared light reception is first blocked. Also good.
The fine adjustment is finished when the parallelism between the slit forming side of the slit forming blades and the slit forming pixel array of the imaging device in the ground plane receiving part 50 is within a predetermined range.

After completing the fine adjustment, the screw member 40 is screwed onto the shutter base plate 1 to fix the relative position of the position adjustment hole 33 with the shutter base plate 1.
Thereafter, the shutter base plate 1 is removed from the base plate receiving portion 50.
Thereby, a focal plane shutter unit having a slit forming side whose relative position with the slit forming pixel row of the image sensor is adjusted in parallel is completed.

  According to the focal plane shutter of the present embodiment, the relative position of the position adjustment hole 33 with respect to the shutter base plate 1 is adjusted by slightly rotating the shutter base plate 1 around the shaft hole 1h by the rotation of the eccentric pin 31. Since the base plate mounting angle adjusting mechanism 30 for finely adjusting the mounting angle to the base plate receiving portion 50 is provided, the shutter base plate can be rotated by rotating the eccentric pin 31 without disassembling individual members constituting the shutter blades. 1 can be finely adjusted, and the accuracy of the parallelism of the slit forming side of the slit forming blade 21 with respect to the slit forming pixel array of the imaging device can be improved.

  Further, as a fixing means for fixing the relative position of the position adjustment hole 33 to the shutter base plate 1 at a position where the mounting angle of the shutter base plate 1 to the base plate receiving portion 50 is finely adjusted via the base plate mounting angle adjusting mechanism 30. Since the screw member 40 is provided, the relative position of the position adjustment hole 33 to the shutter base plate 1 can be fixed by the screw member 40, and even if the shutter base plate 1 is subsequently removed from the base plate receiving portion 50, the shutter base plate 1 The mounting angle to the main plate receiving portion 50 can be maintained.

  For this reason, as a pre-process to be incorporated into the camera, the shutter base plate 1 is attached to the base plate receiving portion 50 provided on the base unit dedicated to assembling the shutter unit, and the mounting angle of the shutter base plate 1 to the base plate receiving portion 50 is finely adjusted. After fixing the relative position of the position adjustment hole 33 to the shutter base plate 1 with the screw member 40, by repeating a series of steps of removing from the base plate provided with the base plate receiving portion 50, in the step of incorporating in the camera thereafter, When the shutter base plate 1 is attached to a base plate receiving portion 50 of a camera main body (not shown), a shutter capable of maintaining the parallelism of the slit forming side of the slit forming blade 21 with respect to the slit forming pixel row of the image sensor with high accuracy. Units can be mass-produced.

Further, according to the present embodiment, the shaft hole 1h of the shutter base plate 1 is provided on a straight line passing through the center of the opening 1a of the shutter base plate 1, so that the slit forming side of the slit forming blade (here, the shutter blade 21). ), The amount of rotation of the shutter base plate 1 required to adjust the parallelism between the base plate receiving portion 50 and the slit forming pixel array of the image sensor can be minimized. As a result, the amount of rotation of the shutter base plate 1 relative to the amount of rotation of the eccentric pin 31 is minimized, and the parallelism using the eccentric pin 31 can be easily finely adjusted.
The position where the shaft hole 1 h of the shutter base plate 1 is provided is not limited to a straight line passing through the center of the opening 1 a of the shutter base plate 1, and may be another position off the straight line. . However, when the shaft hole 1h of the shutter base plate 1 is provided at a position off the straight line passing through the center of the opening 1a of the shutter base plate 1, depending on the rotation angle of the shutter base plate 1, the slit forming side of the slit forming blade When the parallelism with the slit forming pixel row of the image sensor is adjusted, the slit width that can be formed varies greatly for each shutter base plate 1 to be adjusted, and imaging is performed when each shutter unit is incorporated in the camera body. The variation in the exposure amount controlled by the electronic curtain of the element becomes large, and it may be difficult to mass-produce a shutter unit having a constant quality. On the other hand, if the shaft hole 1h of the shutter base plate 1 is provided on a straight line passing through the center of the opening 1a of the shutter base plate 1, regardless of the rotation angle of the shutter base plate 1, When the amount of variation of the slit width that can be formed when adjusting the parallelism with the slit formation pixel row of the image sensor is minimized for each shutter base plate 1 to be adjusted, and each shutter unit is incorporated in the camera body. Thus, it is possible to mass-produce a shutter unit of a constant quality that suppresses variations in exposure amount controlled by the electronic screen of the image sensor.
Further, according to the present embodiment, since the elongated hole 1i of the shutter base plate 1 is provided on a straight line passing through the center of the opening 1a of the shutter base plate 1, the mounting angle of the shutter base plate 1 can be easily adjusted. Of course, the position where the long hole 1i of the shutter base plate 1 is provided may be another position off the straight line.

  Then, as in this embodiment, the focal plane shutter unit having the slit forming side whose relative position with the slit forming pixel column of the imaging element is adjusted in parallel is provided with the imaging plane and the focal plane shutter unit. By incorporating it into the camera main body provided with the ground plate receiving portion for attaching the shutter base plate 1 of the shutter, a digital camera with even higher precision in shutter performance can be obtained.

  In this embodiment, the shaft hole 1h, the long hole 1i, and the base plate attachment angle adjusting mechanism 30 are provided on the shutter base plate 1. However, the shaft hole, the long hole, and the base plate attachment angle adjusting mechanism are provided on the cover plate 2. It may be provided. Further, the long hole 1i may be formed so that only the second pin 52 provided in the main plate mounting portion 50 can be loosely fitted.

Further, in the present embodiment, the focal plane shutter as a unit to be attached to the main plate receiving portion 50 has been described. However, in the present invention, the attachment angle of the shutter base plate 1 to the main plate receiving portion 50 via the main plate attachment angle adjusting mechanism 30 is different. A focal plane shutter in which the relative position of the position adjustment hole 33 to the shutter base plate 1 is fixed via a fixing means 40 at a finely adjusted position, and a shutter base plate 1 of the focal plane shutter having an image sensor. It is also possible to configure a camera unit integrated with a substrate provided with a base plate receiving portion 50 to which the base plate is attached, and attach the configured camera unit to the camera body.
In the present embodiment, the description has been made on the assumption that the base plate receiving portion 50 includes two pins. However, the present invention can also be applied to a configuration in which the base plate receiving portion 50 includes three or more pins. It is. In that case, for the pins after the third pin, if a hole that does not interfere with the pin is formed in the shutter base plate 1 when the mounting angle to the base plate receiving portion 50 is adjusted, the pin can be passed therethrough. Good.
In this embodiment, the mechanical shutter is used for the rear curtain. However, if the configuration can form a slit in combination with the electronic curtain during the exposure operation, the mechanical shutter is also used for the front curtain. The present invention is applicable.
Furthermore, in the present embodiment, the configuration in which the slit is formed by the curtain by the mechanical shutter traveling in the same direction as the electronic curtain is described, but the curtain by the mechanical shutter is different from the electronic curtain (for example, in directions opposite to each other). The present invention is also applicable to a configuration in which slits are formed by running.

DESCRIPTION OF SYMBOLS 1 Shutter base plate 1a, 2a Opening part 1b Long hole 1c, 1d, 1f, 1g Shaft 1h Shaft hole 1i Long hole 1i-1 Thick groove part 1i-2 Narrow hole part 1j Mounting hole 1k Screw groove 2 Auxiliary base plate 2b Long hole 4 Iron Core member 11 Driving member 11a Driven portion 11b Drive pin 11c Mounting portion 13 Iron piece member 13a Shaft portion 13b Head portion 13c Iron piece portion 14 Set member 14b Pushing portion 17, 18 Arm 17a Long hole 18a Hole 19, 20, 21 Blade DESCRIPTION OF SYMBOLS 23 Support plate 24 Ratchet member 30 Ground plate attachment angle adjustment mechanism 31 Eccentric pin 31a Shaft part 31b Head part 31c Groove 32 Movable plate 33 Position adjustment hole 34 Guide groove 35 Eccentric pin guide hole 36 Screw member insertion hole 40 Screw member (fixing means)
40a Shaft portion 40b Head portion 50 Base plate receiving portion 51 First pin 51a Tip portion 51b Large diameter portion 52 Second pin 52a Tip portion 52b Large diameter portion 53 Opening portion

Claims (6)

A ground plate provided with shutter blades capable of forming a slit in combination with an electronic curtain during an exposure operation, and the ground plate is provided in the ground plate receiving portion provided with at least first and second pins; A focal plane shutter attached via two pins,
The base plate is
A shaft hole that is rotatably fitted to the first pin;
An elongated hole capable of loosely fitting the second pin that moves relatively along the rotation direction within a predetermined rotation angle range of the main plate with the shaft hole as a center;
The relative position with respect to the main plate can be changed, and the second pin loosely fitted in the elongated hole is inserted, and the second pin is brought into contact with the second pin on both side surfaces in the rotation direction side of the main plate. A position adjustment hole that touches,
For finely adjusting the mounting angle of the base plate receiving portion for adjusting the relative position of the position adjustment hole with the base plate by slightly rotating the base plate around the shaft hole by rotating an eccentric pin. A base plate mounting angle adjustment mechanism,
Fixing means for fixing the relative position of the position adjustment hole to the ground plate at a position where the mounting angle of the ground plate to the ground plate receiving portion is finely adjusted via the ground plate mounting angle adjusting mechanism. The focal plane shutter. The base plate mounting angle adjusting mechanism is
The eccentric pin rotatably attached to the base plate;
A movable plate that has the position adjustment hole and slightly rotates the ground plate around the shaft hole while changing a relative position with the ground plate by rotation of the eccentric pin;
A guide groove provided on the base plate and capable of guiding the movable plate in a linear direction substantially along a rotation direction within a predetermined rotation angle range of the base plate around the shaft hole;
The focal plane shutter according to claim 1, further comprising an eccentric pin guide hole provided in the movable plate and capable of guiding the eccentric pin along a direction perpendicular to a guide direction of the guide groove. .   The focal plane shutter according to claim 1 or 2, wherein the shaft hole of the base plate is provided on a straight line passing through the center of the opening of the base plate. The relative position of the position adjustment hole with respect to the ground plane is fixed via the fixing means at a position where the mounting angle of the ground plane to the ground plane receiving portion is finely adjusted via the ground plane mounting angle adjusting mechanism. The focal plane shutter according to any one of claims 1 to 3,
A digital camera having an image sensor and a main body provided with the base plate receiving portion for mounting the base plate of the focal plane shutter. The relative position of the position adjustment hole with respect to the ground plane is fixed via the fixing means at a position where the mounting angle of the ground plane to the ground plane receiving portion is finely adjusted via the ground plane mounting angle adjusting mechanism. The focal plane shutter according to any one of claims 1 to 3,
A substrate having an image sensor and provided with the base plate receiving portion for mounting the base plate of the focal plane shutter;
A camera unit consisting of   A digital camera comprising the camera unit according to claim 5.

Images