JP6329443B2 - Focal plane shutter and camera - Google Patents

Description

  The present invention relates to a focal plane shutter having a blade member that opens and closes an opening for exposure, and in particular, opens and closes an opening for exposure in a digital camera such as a single-lens camera, a single-lens reflex camera, a mirrorless camera, or a rangefinder camera. More particularly, the present invention relates to a focal plane shutter and a camera including a blade member formed by connecting two arms and a blade.

  As a conventional focal plane shutter, a substantially rectangular ground plate (shutter substrate) having an opening for exposure, and a plurality of blades are connected by a drive arm and a support arm (connected as a parallel link mechanism) are formed. A blade member (a leading blade group) that opens and closes the opening, a drive pin that is connected to a drive arm to drive the blade member, and a drive lever that rotates about the support shaft of the main plate, and can rotate about a fixed shaft An auxiliary plate that is disposed and has a support shaft that fixes the pivot of the support arm on the free end side, an eccentric shaft that is provided on the ground plate so as to be adjustable in angular position and abuts the edge of the auxiliary plate, and an auxiliary plate A spring or the like that biases in the direction to contact the eccentric shaft, and the drive arm of the blade member is rotatably connected to the support shaft of the main plate (coaxially with the support shaft of the drive lever and the auxiliary plate). Support arm of auxiliary plate The shaft is pivotably connected to the shaft, and the auxiliary plate is appropriately rotated to a desired angular position via the eccentric shaft, so that the pivot center (support shaft) of the support arm is moved to define the blade member (blade). There is known a technique in which lateral unevenness or the like at the time of photographing is reduced by directing to an optimal position with respect to the frame (see, for example, Patent Document 1).

  However, this focal plane shutter is provided with an auxiliary plate connected to the support arm of the blade member, an eccentric shaft that can be engaged and moved with the auxiliary plate, a spring that urges the auxiliary plate toward the eccentric shaft, and the like. Therefore, the structure is complicated, the number of parts is large, and it is necessary to provide an area for arranging the auxiliary plate and the eccentric shaft on the ground plane. It is difficult to reduce the size and thickness of the device. is there.

JP-A-7-140521

  The present invention has been made in view of the above circumstances. The object of the present invention is to simplify the structure, reduce the number of parts, reduce the thickness of the device, and reduce the size of the blade member. A focal plane shutter capable of adjusting the inclination angle) with high accuracy with respect to the image frame (for example, the inner edge of the opening forming the rectangular shape of the base plate), and suppressing or preventing lateral unevenness at the time of photographing; It is to provide a camera using the same.

The focal plane shutter of the present invention includes a ground plate having an opening, and a blade member including two arms and a blade that are rotatably supported with respect to a support shaft of the ground plate to open and close the opening. The focal plane shutter is characterized in that a fitting adjusting member fitted so as to be rotatable about a supporting shaft is provided to adjust the mounting position of at least one of the two arms with respect to the supporting shaft.
According to this configuration, the two arms rotate around the support shafts of the respective ground plates, so that the blades connected to the two arms operate so as to open and close the opening, and the shutter operation by the blade member Is done.
Here, by rotating and adjusting the fitting adjustment member as appropriate, the attachment position of at least one arm of the blade member relative to the support shaft can be adjusted as appropriate. Therefore, the angular position (relative inclination) of the two arms Therefore, the inclination angle of the blade of the blade member can be adjusted with high accuracy with respect to the image frame (for example, the inner edge of the opening forming the rectangle of the base plate). Etc. can be suppressed or prevented more reliably.
Here, in particular, since the fitting adjusting member is fitted so as to be rotatable around the support shaft, the structure is simplified, the number of parts is reduced, the parts are consolidated, the apparatus is thinned, and the size is reduced. can do.

In the above configuration, the fitting adjusting member includes an inner peripheral surface that allows the support shaft of the main plate to be rotatably fitted, and an outer peripheral surface that is offset from the center line of the inner peripheral surface and is fitted to the connecting hole of the arm. It is possible to adopt a configuration including:
According to this configuration, the arm of the blade member is fitted to the fitting adjustment member by fitting the support shaft of the base plate to the inner circumferential surface thereof, and fitting the outer circumferential surface of the arm coupling hole. Since it is rotatably supported around the support shaft via the fitting adjustment member, the fitting adjustment member is appropriately rotated to adjust the direction of deviation of the outer peripheral surface with respect to the inner peripheral surface, whereby the arm relative to the support shaft is adjusted. The mounting position is adjusted.

In the above configuration, the fitting adjustment member may employ a configuration including an inner cylindrical portion that defines an inner peripheral surface and an outer cylindrical portion that defines an outer peripheral surface.
According to this configuration, in the fitting adjusting member, the support shaft of the base plate is fitted to the inner cylindrical portion (the inner circumferential surface thereof), and the outer cylindrical portion (the outer circumferential surface thereof) is fitted to the connecting hole of the arm. Thus, since the arm of the blade member is supported so as to be rotatable around the support shaft via the fitting adjustment member, the fitting adjustment member is appropriately rotated to change the biasing direction of the outer circumferential surface with respect to the inner circumferential surface. By adjusting, the mounting position of the arm with respect to the support shaft is adjusted. Here, since the fitting adjusting member is formed in a double cylindrical shape, a desired deviation amount (center of the inner peripheral surface is achieved while achieving thinning, that is, weight reduction between the inner cylindrical portion and the outer cylindrical portion. (Distance between the line and the center line of the outer peripheral surface).

In the above configuration, the fitting adjustment member can employ a configuration that includes a flange portion that connects the inner cylindrical portion and the outer cylindrical portion and has an outer diameter larger than that of the outer cylindrical portion.
According to this configuration, the fitting adjustment member can be assembled to the arm by fitting the outer cylindrical portion into the connecting hole of the arm and bringing it into contact with the flange portion, that is, the arm is connected and held by the flange portion. can do.

The said structure WHEREIN: The structure by which the connection part which can connect the tool for rotation adjustment so that attachment or detachment is possible can be employ | adopted for the collar part.
According to this configuration, the fitting adjustment member (the outer cylindrical portion thereof) is incorporated in the arm (the connection hole thereof), the fitting adjustment member (the inner cylindrical portion) is fitted on the support shaft of the main plate, and then the hook portion is connected. The attachment position of the arm with respect to the support shaft can be appropriately adjusted by connecting a tool to the portion and appropriately rotating the fitting adjustment member.

In the above configuration, the outer cylindrical portion may employ a configuration in which a crimping process is performed so as to sandwich the arm in cooperation with the collar portion.
According to this configuration, the outer cylindrical portion is fitted into the connecting hole of the arm and is brought into contact with the flange portion, and the outer cylindrical portion is subjected to a caulking process, so that the fitting adjustment member can be rotated and adjusted with respect to the arm. However, it can be firmly assembled so as not to be displaced unexpectedly after adjustment.

In the above configuration, the outer cylindrical portion may employ a configuration in which a caulking process is performed with a biasing member that biases the arm toward the collar portion.
According to this configuration, since the caulking process is performed with the urging member being sandwiched, the urging force that presses the arm against the collar portion is always acting, and after adjustment, the adjustment position (fitting adjustment member with respect to the arm) Can be held more securely so as not to cause displacement.

The said structure WHEREIN: The structure currently formed so that the outer peripheral surface of a fitting adjustment member may make surface roughness rougher than an inner peripheral surface is employable.
According to this configuration, the inner peripheral surface of the fitting adjustment member is rotatably supported by the support shaft of the base plate so as to smoothly rotate the arm, while the outer peripheral surface of the fitting adjustment member is the arm. The fitting adjustment member and the arm are prevented from relative movement (rotation) by the rough surface roughness after the mounting position is adjusted by being fitted in the connecting hole, ensuring the desired adjustment position. Can be held.

In the above configuration, the fitting adjusting member may be configured by a high strength material having a surface hardness of Hv150 or higher.
According to this configuration, the fitting adjustment member is rotatably connected to the support shaft of the main plate and receives a sliding action in a harsh environment, but is formed of a high-strength material having a surface hardness of Hv150 or more. Therefore, sufficient durability can be ensured, and the attachment position of the arm with respect to the support shaft can be held at a desired adjustment position.

In the above configuration, the fitting adjustment member is provided with a mark indicating the deviation direction of the outer peripheral surface with respect to the inner peripheral surface, and an indicator for rotationally adjusting the fitting adjustment member is provided around the fitting adjustment member. The configuration can be adopted.
According to this configuration, when adjusting the fitting adjustment member by appropriately rotating it, the mark indicating the bias direction can be rotated while being aligned with the index, and the adjustment work can be easily performed.

In the above configuration, the blade member includes a drive arm to which a rotational driving force is exerted and a follow-up arm that follows the drive arm, and the fitting adjustment member is provided on a support shaft that supports the drive arm. can do.
According to this configuration, for example, even when a drive lever or the like that drives the drive arm is arranged coaxially with the support shaft that supports the drive arm, the fitting adjustment member is fitted into the support shaft of the drive arm. Therefore, it is possible to easily arrange the fitting adjusting member while forming an arrangement configuration in which the drive lever and the drive arm are close to each other without requiring an extra arrangement space.

In the above configuration, the blade member includes a leading blade member that opens the opening and a trailing blade member that closes the opening during the shutter operation, and the fitting adjustment member includes the arm of the leading blade member and / or the trailing blade member. The structure provided with respect to the arm can be adopted.
According to this configuration, in the focal plane shutter including the leading blade member and the trailing blade member as the blade member, the leading blade member achieves simplification of the structure, reduction of the number of parts, thinning and downsizing of the apparatus, and the like. In addition, the rear blade member (inclination angle) can be adjusted with high accuracy with respect to the image frame (for example, the inner edge of the opening that forms the rectangular shape of the base plate), and lateral unevenness or the like during photographing can be suppressed or prevented. Can do.

The camera of the present invention includes any one of the focal plane shutters having the above-described configuration, and an image sensor disposed behind the focal plane shutter.
According to this configuration, the blade member (inclination angle) of the blade frame (for example, the rectangular opening of the base plate) is achieved while achieving simplification of the structure, reduction in the number of parts, thinning and downsizing of the apparatus, and the like. The inner edge) can be adjusted with high accuracy, and lateral unevenness and the like during photographing can be suppressed or prevented.

  According to the focal plane shutter having the above-described configuration, the blade member (inclination angle) is made to be an image frame (for example, a rectangular shape of the ground plane) while achieving simplification of the structure, reduction of the number of parts, thinning and downsizing of the apparatus, and the like. The focal plane shutter and the camera using the same can be obtained.

1 is a plan view showing an embodiment of a focal plane shutter according to the present invention, in which a blade member (a leading blade member and a rear blade member) is set at a set position before a shutter operation (before an exposure operation). is there. In the focal plane shutter shown in FIG. 1, it is a top view which shows the state which the blade member (the front blade member and the rear blade member) completed the shutter operation. FIG. 2 shows a fitting adjusting member included in the focal plane shutter shown in FIG. 1, (a) is a sectional view thereof, and (b) is an end view of the collar portion as viewed from the outside. FIG. 1 shows a fitting adjusting member included in the focal plane shutter shown in FIG. 1. FIG. 1A shows a fitting adjusting member fitted into a connecting hole of an arm (driving arm) included in a blade member and a biasing member ( (B) is a cross-sectional view showing a state in which the outer cylindrical portion of the fitting adjusting member has been subjected to a caulking process. In the focal plane shutter shown in Drawing 1, it is a mimetic diagram for explaining adjustment work which rotates a fitting adjustment member suitably, adjusts an attachment position of a drive arm of a blade member, and adjusts an inclination of a blade. FIG. 6 shows another embodiment of a fitting adjusting member included in the focal plane shutter according to the present invention, wherein FIG. (A) is a fitting fitting member fitted into a connecting hole of an arm (driving arm) included in a blade member. FIG. 6B is a cross-sectional view showing a state in which an urging member (spring washer) also serving as a caulking process is assembled to the outer cylindrical portion of the fitting adjusting member.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 to 4, the focal plane shutter according to this embodiment includes a substantially rectangular base plate 10, a leading blade member 20 as a blade member provided movably along the ground plate 10, and a trailing blade member 30. The drive mechanism (not shown, for example, drive lever DL, drive spring, etc.) for driving the leading blade member 20 and the trailing blade member 30, respectively, and the drive lever DL of the drive mechanism at the set position before the shutter operation while resisting the urging force A set member (not shown) that can be set, an electromagnet (not shown) that magnetically holds and holds the drive lever DL at the set position, and a fitting that adjusts the mounting position of one arm (drive arm 21) of the leading blade member 20 An adjustment member 40 and the like are provided.
A back plate 11 having an opening 11a for exposure is disposed at a predetermined interval on the side opposite to the front side (back side) on which the drive mechanism, the set member and the like are arranged. An intermediate plate 12 having an opening 12 a is disposed at a predetermined interval between the back plate 11 and the back plate 11, and a blade chamber for accommodating the leading blade member 20 is defined between the back plate 11 and the intermediate plate 12. A blade chamber for accommodating the rear blade member 30 is defined between the main plate 10 and the intermediate plate 12.
In addition, a camera is configured by disposing an image sensor such as a CCD disposed behind the focal plane shutter having the above-described configuration.

  As shown in FIGS. 1, 2, and 4, the base plate 10 is formed in a substantially rectangular flat plate shape using, for example, a resin material, and the opening 10 a that forms a rectangular shape for exposure and driving of the drive lever DL. Support shafts 10d and 10e provided upright on the blade chamber side (back side) to rotatably support the arc-shaped long holes 10b and 10c through which the pin DP passes, the drive arm 21 and the follower arm 22 of the leading blade member 20, respectively. The support shafts 10f and 10g erected on the blade chamber side (back side) and the drive lever DL of the leading blade member 20 are rotated so as to rotatably support the drive arm 31 and the follower arm 32 of the rear blade member 30. The support shaft 10h, which is erected on the same axis as the support shaft 10d on the front side (the side opposite to the blade chamber side) to support it freely, and the front side (supporting the drive lever DL of the rear blade member 30). On the opposite side of the blade chamber) And a support shaft 10i or the like that are disposed on the shaft 10f coaxially.

As shown in FIGS. 1, 2, 3, and 4, the leading blade member 20 has a drive arm 21 and a follower arm 22 as two arms, and a drive arm 21 and a follower arm 2 via a pivot (rivet). It is composed of three blades 23, 24, 25, etc. connected.
The drive arm 21 is formed in a flat plate shape, and as shown in FIGS. 1 to 4, the connection hole 21a into which the outer cylindrical portion 42 (the outer peripheral surface 42a thereof) of the fitting adjustment member 40 is fitted, and the drive lever DL. A connection hole 21b to which the drive pin DP is connected is provided.
The follower arm 22 is formed in a flat plate shape and includes a shaft hole 22a and the like into which the support shaft 10e of the base plate 10 is fitted, as shown in FIGS.
The three blades 23, 24, and 25 are formed in a flat plate shape, and the drive arm 21 and the follower arm 22 are rotated (synchronized) about their respective rotation centers (support shaft 10d, support shaft 10e). By moving the link), the opening 10a is opened and closed by reciprocating as shown in FIGS.
The leading blade member 20 is rotated counterclockwise (in the direction of closing the opening 10a) by a backlash spring (not shown) (provided between the drive arm 21 or the follower arm 22 and the main plate 10). As shown in FIG. 1, the drive arm 21 (and the follower arm 22) is driven upward (counterclockwise) by the drive lever DL as shown in FIG. , 25 expands and closes the opening 10a, and is driven downward (clockwise) so that the three blade bodies 23, 24, 25 overlap to open the opening 10a. It has become.

As shown in FIGS. 1 and 2, the rear blade member 30 includes three driving arms 31 and follower arms 32 as two arms, which are connected to the drive arms 31 and follower arms 32 via pivots (rivets). It is comprised by the blade | wing 33,34,35 grade | etc.,.
The drive arm 31 is formed in a flat plate shape, and as shown in FIGS. 1 and 2, a shaft hole 31a into which the support shaft 10f of the base plate 10 is fitted, and a connection hole 31b to which the drive pin DP of the drive lever DL is connected. Etc.
The follower arm 32 is formed in a flat plate shape, and includes a shaft hole 32a and the like into which the support shaft 10g of the base plate 10 is fitted, as shown in FIGS.
The three blades 33, 34, and 35 are formed in a flat plate shape, and the drive arm 31 and the follower arm 32 are rotated (synchronized) with their respective rotation centers (support shaft 10f, support shaft 10g) as the centers. By moving the link), the opening 10a is opened and closed by reciprocating as shown in FIGS.
The rear blade member 30 is rotated counterclockwise (in the direction of opening the opening 10a) by a backlash spring (not shown) (provided between the drive arm 31 or the follower arm 32 and the base plate 10). As shown in FIG. 1, the drive arm 31 (and the follower arm 32) is driven upward (counterclockwise) by the drive lever DL as shown in FIG. 25 are overlapped to open the opening 10a, while being driven downward (clockwise), the three blade bodies 33, 34, 35 are deployed to close the opening 10a. It has become.

The fitting adjusting member 40 is formed using a metal material (for example, a high-strength material having a Vickers hardness of Hv 150 or more), and as shown in FIGS. 3 and 4, the inner cylindrical portion 41 and the outer cylindrical portion. 42, a collar part 43, and the like.
As shown in FIGS. 3A and 3B, the inner cylindrical portion 41 defines an inner peripheral surface 41a having a center line C1, and the support shaft 10d of the main plate 10 is in close contact with the inner peripheral surface 41a. It is formed to be slidably fitted.
Here, since the inner peripheral surface 41a rotates around the support shaft 10d, the inner surface 41a is finished to be a smooth surface with small surface roughness in order to smoothly rotate the drive arm 21.
As shown in FIGS. 3A and 3B, the outer cylindrical portion 42 has an outer peripheral surface having a center line C2 that is lower than the inner cylindrical portion 41 and has a center line C2 deviated from the center line C1 of the inner peripheral surface 41a by a predetermined amount. 42a is defined, and the connecting hole 21a of the drive arm 21 is formed to be fitted to the outer peripheral surface 42a. Further, as shown in FIGS. 4A and 4B, the upper cylindrical portion 42 is bent (plastically deformed) and subjected to a caulking process.
Here, after the outer peripheral surface 42a is fitted in the coupling hole 21a of the drive arm 21 and the assembly position is adjusted as appropriate, the surface roughness is large to prevent relative movement (rotation) of the two. That is, it is formed so as to have a surface roughness rougher than the surface roughness of the inner peripheral surface 41a.

As shown in FIGS. 3A and 3B, the flange portion 43 is formed in a disc shape that connects the inner cylindrical portion 41 and the outer cylindrical portion 42 and has an outer diameter larger than that of the outer cylindrical portion 42. Yes. The flange 43 serves to hold the drive arm 21 by bringing the drive arm 21 into contact with the outer cylindrical portion 42 (the outer peripheral surface 42a thereof) being fitted into the coupling hole 21a of the drive arm 21.
In addition, a linear groove (slot) 43a is formed on the outer end face of the flange portion 43 as a connecting portion that can removably connect a tool for rotation adjustment.
Further, the straight groove 43a is formed so as to extend linearly in the deflection direction L of the outer peripheral surface 42a with respect to the inner peripheral surface 41a (the arrangement direction of the center lines C1 and C2), and therefore, a mark indicating the deviation direction L It has come to be used as both.
Here, since the fitting adjustment member 40 is formed in a double cylindrical shape having the inner cylindrical portion 41 and the outer cylindrical portion 42, the lightening between the inner cylindrical portion 41 and the outer cylindrical portion 42, that is, the weight reduction is achieved. In addition, the shape can be crimped, and a desired amount of deviation (the distance between the center line C1 of the inner peripheral surface 41a and the center line C2 of the outer peripheral surface 42a) can be ensured.

Next, an operation of connecting the fitting adjusting member 40 having the above configuration to the drive arm 21 will be described with reference to FIGS. 4 (a) and 4 (b).
First, as shown in FIG. 4A, the connecting hole 21a of the drive arm 21 is fitted (externally fitted) into the outer cylindrical portion 42 (the outer peripheral surface 42a) of the fitting adjusting member 40, and the flange portion 43 is fitted. Next, an annular spring washer W as an urging member is fitted (externally fitted) into the outer cylindrical portion 42 (the outer peripheral surface 42a thereof) so as to overlap the drive arm 21.
Then, as shown in FIG. 4B, a substantially upper half region of the outer cylindrical portion 42 is bent and folded on the spring washer W to be subjected to a caulking process.
Since the spring washer W is sandwiched and crimped in this way, the urging force that presses the drive arm 21 against the flange 43 is always applied, and after adjustment, the adjustment position (fitting to the drive arm 21) is applied. The displacement direction L) of the alignment member 40 is securely held so as not to cause a positional shift.

Next, an adjustment operation for adjusting the attachment position of the drive arm 21 by attaching the leading blade member 20 incorporating the fitting adjustment member 40 to the support shaft 10d of the main plate 10 will be described.
As described above, the support shaft 10d of the base plate 10 is fitted to the inner peripheral surface 41a of the fitting adjustment member 40 in a state where the fitting adjustment member 40 is assembled to the connecting hole 21a of the drive arm 21 by the caulking process. Further, the support shaft 10 e of the base plate 10 is fitted into the connection hole 22 a of the follower arm 22.
Subsequently, the tool is connected to the linear groove 43a provided in the flange portion 43 of the fitting adjusting member 40, and for example, the direction of the linear groove 43a is confirmed while checking the index (not shown) provided on the back surface of the main plate 10. The fitting adjustment member 40 is appropriately rotated around the support shaft 10d while the position of the drive arm 21 is attached to the support shaft 10d.
Then, a predetermined member is connected so that the blade member 20 does not fall off from the main plate 10.
As described above, the fitting adjustment member 40 is appropriately rotated to adjust the biasing direction L of the outer peripheral surface 42a with respect to the inner peripheral surface 41a, thereby adjusting the mounting position of the drive arm 21 with respect to the support shaft 10d. The angle position (relative tilt state) of the drive arm 21 with respect to the angle is adjusted. Therefore, as shown in FIG. 5, the tilt angle of the blades 23 (24, 25) of the blade member 20 is set to the image frame (for example, the base plate 10). The inner edge of the opening 10a having a rectangular shape) can be adjusted with high accuracy, and lateral unevenness and the like during photographing can be reliably suppressed or prevented.
In addition, after the adjustment, the spring washer W is sandwiched and crimped, and the urging force that presses the drive arm 21 against the flange portion 43 is always applied. Therefore, the adjustment position (fitting adjustment to the drive arm 21) The biasing direction L) of the member 40 is securely held so as not to cause a positional shift.

According to the focal plane shutter having the above-described configuration, since the fitting adjustment member 40 is fitted so as to be rotatable around the support shaft 10d, the structure is simplified, the number of parts is reduced, the parts are integrated, and the apparatus is thin. Downsizing and downsizing can be achieved.
Moreover, since the connection part (straight groove | channel 43a) which connects a tool to the collar part 43 of the fitting adjustment member 40 is provided, rotation adjustment of the fitting adjustment member 40 can be performed easily, and with respect to the spindle 10d. The mounting position of the drive arm 21 can be easily adjusted.
Moreover, since the outer peripheral surface 42a of the fitting adjustment member 40 is formed so as to have a rougher surface roughness than the inner peripheral surface 41a, the connection hole 21a of the drive arm 21 is formed in the outer peripheral surface 42a of the fitting adjustment member 40. Are fitted and the mounting position is adjusted, relative movement (rotation) of the fitting adjusting member 40 and the drive arm 21 is prevented by the rough surface roughness, so that a desired adjustment position is ensured. Can be held in.
In addition, since the fitting adjustment member 40 is formed of a high-strength material having a surface hardness of Hv 150 or higher, the fitting adjustment member 40 is rotatably connected to the support shaft 10d of the base plate 10 in a harsh environment. Even if the sliding action is received, sufficient durability can be secured, and the mounting position of the drive arm 21 with respect to the support shaft 10d can be held at a desired adjustment position.
In addition, the fitting adjustment member 40 is provided with a mark (straight groove 43a) indicating the biasing direction L, and an index for adjusting the rotation of the fitting adjustment member 40 around the fitting adjustment member 40 (the back side or the back side of the base plate 10). When the fitting adjusting member 40 is appropriately rotated and adjusted by adjusting the mark (straight groove 43a) indicating the deviation direction L, the adjusting operation is performed by rotating the mark (straight groove 43a) according to the index. Can be done easily.
Furthermore, since the fitting adjusting member 40 is provided around the support shaft 10d of the drive arm 21, the drive lever DL and the like for driving the drive arm 21 are coaxial with the support shaft 10d for supporting the drive arm 21 (support shaft 10h). ), The fitting adjustment member 40 can be easily arranged while forming an arrangement configuration in which the drive lever DL and the drive arm 21 are close to each other without requiring an extra arrangement space. .

6 (a) and 6 (b) show another embodiment of a fitting adjusting member included in the focal plane shutter according to the present invention. The same reference numerals are given to the same components as those of the above-described embodiment. Therefore, the description is omitted.
In this embodiment, the fitting adjustment member 40 ′ is formed in a single cylindrical shape that defines an inner peripheral surface 41 a and an outer peripheral surface 42 a, and includes a flange portion 43 at the end thereof.
Further, the spring washer W ′ is fitted into the outer peripheral surface 42a and is prevented from falling off (it is hooked as if the outer peripheral surface 42a has been subjected to a caulking process).
When connecting the fitting adjustment member 40 ′ to the drive arm 21, as shown in FIG. 6A, the connection hole 21 a of the drive arm 21 is fitted into the outer peripheral surface 42 a of the fitting adjustment member 40 ′ ( 6 (b), then, as shown in FIG. 6 (b), the outer peripheral surface 42a is formed with an annular member as a biasing member so as to overlap with the driving arm 21. The spring washer W ′ is fitted (fitted externally). The spring washer W ′ is formed so as to be prevented from falling off in the reverse direction when fitted.
Therefore, even if the caulking process as described above is not performed, the urging force that presses the drive arm 21 against the flange portion 43 always acts, and after adjustment, the adjustment position (the fitting adjustment member 40 ′ with respect to the drive arm 21 is adjusted). The deviation direction L) is securely held so as not to cause a positional shift.
For the sake of safety, the adjustment position may be prevented from shifting after adjustment using an adhesive or the like.

In the above-described embodiment, the case where the fitting adjustment members 40 and 40 ′ are provided with respect to the drive arm 21 of the leading blade member 20 has been described. Alternatively, both arms (the drive arm 21 and the follower arm 22) may be provided, and not only the arm (the drive arm 21 and the follower arm 22) of the leading blade member 20, but also the arm ( A configuration provided for the drive arm 31 or the follower arm 32) may be employed.
In the above-described embodiment, the fitting adjusting members 40 and 40 'are shown as the fitting adjusting members. However, the fitting adjusting members 40 and 40' are not limited thereto, and are attached to the support shaft of at least one of the two arms of the blade member. A fitting adjustment member having another form may be adopted as long as it is fitted so as to be rotatable around the support shaft in order to adjust the position.
In the said embodiment, the structure which provided fitting adjustment member 40,40 'with respect to the drive arm 21 of the leading blade member 20 in the structure provided with the leading blade member 20 and the trailing blade member 30 as a blade member is shown. However, the present invention is not limited to this, and a fitting adjustment member may be employed for the arm in a configuration including a single blade member as the blade member.

  As described above, the focal plane shutter according to the present invention achieves the simplification of the structure, the reduction in the number of parts, the thinning and the miniaturization of the apparatus, and the like, while the blade member (inclination angle) is arranged on the image frame (for example, It can be adjusted with high accuracy with respect to the inner edge of the opening that forms the rectangular shape of the base plate, and can suppress or prevent lateral unevenness at the time of shooting, so a single-lens camera, a single-lens reflex camera, a mirrorless camera, Of course, the present invention can be applied to a digital camera such as a range finder camera, and is also useful for other optical apparatuses having an opening for exposure.

DESCRIPTION OF SYMBOLS 10 Base plate 10a Opening part 10d, 10c Support shaft 20 Lead blade member 21 Drive arm 21a Connecting hole 22 Follow arm 23, 24, 25 Blade 30 Lead blade member 31 Drive arm 32 Follow arm 33, 34, 35 Blade 40, 40 'fitting Matching adjustment member 41 Inner cylindrical portion 41a Inner peripheral surface C1, C2 Center line 42 Outer cylindrical portion 42a Outer peripheral surface L Deflection direction 43 Gutter portion 43a Linear groove (connecting portion, mark)
W, W 'Spring washer (biasing member)

Claims (12)

A focal plane shutter comprising: a base plate having an opening; and a blade member including two arms and a blade that are rotatably supported with respect to a support shaft of the base plate to open and close the opening. ,
Has a fitting adjustment member fitted rotatable on the shaft about to adjust the mounting position relative to the support shaft of the at least one arm of said two arms,
The fitting adjusting member includes an inner circumferential surface that allows the support shaft of the base plate to be pivotably fitted, and an outer circumferential surface that is offset from a center line of the inner circumferential surface and is fitted to the connecting hole of the arm. Including
A focal plane shutter characterized by that. The fitting adjustment member includes an inner cylindrical portion that defines the inner peripheral surface and an outer cylindrical portion that defines the outer peripheral surface.
The focal plane shutter according to claim 1 . The fitting adjustment member includes a flange portion that connects the inner cylindrical portion and the outer cylindrical portion and has an outer diameter larger than that of the outer cylindrical portion.
The focal plane shutter according to claim 2 . The collar portion is provided with a connecting portion that can removably connect a tool for rotation adjustment.
The focal plane shutter according to claim 3 . The outer cylindrical portion is subjected to a crimping process so as to sandwich the arm in cooperation with the flange portion,
The focal plane shutter according to claim 3 or 4 , The outer cylindrical portion is subjected to a crimping process by sandwiching a biasing member that biases the arm toward the collar portion.
The focal plane shutter according to claim 5 . The outer peripheral surface is formed so as to have a rougher surface roughness than the inner peripheral surface.
The focal plane shutter according to any one of claims 1 to 6 . The fitting adjusting member is formed of a high strength material having a surface hardness of Hv150 or higher.
The focal plane shutter according to any one of claims 1 to 7, wherein The fitting adjustment member is provided with a mark indicating a deviation direction of the outer peripheral surface with respect to the inner peripheral surface,
Around the fitting adjustment member, an indicator for adjusting the rotation of the fitting adjustment member is provided.
The focal plane shutter according to any one of claims 1 to 8, wherein The blade member includes a drive arm to which a rotational driving force is exerted, and a follow-up arm that follows the drive arm,
The fitting adjustment member is provided on a support shaft that supports the drive arm,
The focal plane shutter according to any one of claims 1 to 9 . The blade member includes a front blade member that opens the opening and a rear blade member that closes the opening during shutter operation,
The fitting adjustment member is provided with respect to the arm of the leading blade member and / or the arm of the trailing blade member,
The focal plane shutter according to any one of claims 1 to 10 . The focal plane shutter according to any one of claims 1 to 11, and an image sensor disposed behind the focal plane shutter,
A camera characterized by that.

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