JP3604794B2 - Focal plane shutter for camera - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a focal plane shutter for a camera including a front blade group and a rear blade group each configured by pivotally connecting a plurality of blades to a plurality of arms.
[0002]
[Prior art]
This type of focal plane shutter generally has two blade chambers with an intermediate plate as a boundary between a substrate on which a drive mechanism or the like is mounted and an auxiliary substrate mounted on the substrate at a predetermined interval. As disclosed in Japanese Patent Application Laid-Open No. 7-218980, the substrate, the rear blade holding plate, the rear blade group, the intermediate plate, the front blade group, the front blade holding plate, Substrates are arranged in the order of the substrates, and conversely, in order from the substrate side, a substrate, a front blade holding plate, a front blade group, an intermediate plate, a rear blade group, a rear blade holding plate, and an auxiliary substrate are arranged in this order. Is known. Among these, the front blade holding plate, the intermediate plate, and the rear blade holding plate are movable in the optical axis direction between the two substrates.
[0003]
The reason for making the three plates movable in this way is that when the blade group is in the superimposed state where it is stored outside the exposure opening and when it is in the unfolded state that covers the exposure opening, it is necessary in the optical axis direction. Is different from the above. That is, if a wide interval is provided in the unfolded state as in the superimposed state, the respective blades can largely move in the optical axis direction. The direction becomes unstable, and light leakage occurs between the respective blades. In addition, the traveling of the blade group may be unstable. Therefore, if each of the above-mentioned plates is made movable in the optical axis direction, the overlapping and storing position of the front blade group and the rear blade group is on the opposite side up and down with respect to the exposure opening, and each of the above plates is thin. Due to the flexibility, each plate changes its interval in accordance with the operation of the blade group, and when viewed from the side of the exposure aperture, the operation of each blade group is inclined with respect to each substrate surface. It stabilizes and prevents light leakage.
[0004]
However, recently, the role of the front blade holding plate and the rear blade holding plate has been focused on stabilizing the running of the blade group rather than light leakage countermeasures. When it says, it has become like a spacer. As is well known, the head of the connecting shaft (dove) between the blade and the arm protrudes from the surface of the arm. Therefore, it is necessary to prevent the head from hitting the end face of the aperture during running. Further, since each blade bends during traveling, it is necessary to prevent its end face from colliding with the end face of the aperture. For that purpose, it is necessary to keep the blade surface as far as possible from the aperture forming surface. The front blade holding plate and the rear blade holding plate are arranged only on the tip end side of the blade and have a substantially U-shape, thus playing this role. For this reason, recently, by increasing the thickness of a part of the two substrates, that is, a portion in contact with the front blade holding plate and the rear blade holding plate, it is not necessary to provide these holding plates. Has been considered and its existence is no longer essential.
[0005]
On the other hand, in this type of focal plane shutter, since each blade group travels at an extremely high speed, it bounces when the travel stops, and in the case of the front blade group, it partially covers the exposure aperture again temporarily, and It is known that in the case of a blade group, exposure unevenness is generated by temporarily reopening a part of the exposure opening. Therefore, it is necessary to provide a braking means for each blade group, and many proposals have been made and implemented so far. These braking means can be roughly divided into those that directly apply a braking force to the blade, those that apply a braking force to a pivot axis between the blade and the arm, those that apply a braking force to the arm, and those that apply a group of blades. Some of them apply a braking force to a driving member, and recently, they are often used together.
[0006]
Among these, those that directly apply a braking force to the blade include those that cause the end surface in the running direction of the blade to collide with a cushioning member provided at the stop position of the blade, and those that are elastic by a leaf spring or the like. There is a device that pushes in the direction of the optical axis, but the former braking device is not suitable for the main braking device because it collides with the end face of the thin blade directly in front. However, the latter braking means can be used both as a main braking means and as a sub-braking means, and when applied to the rear blade group, the slit forming blade is pushed in the optical axis direction at the deployed position. Therefore, it is possible to help prevent light leakage as described above. An example in which the blade is pushed in the optical axis direction by a leaf spring is described in Japanese Utility Model Publication No. 53-16893.
[0007]
[Problems to be solved by the invention]
As described above, the braking means is originally for preventing the blade from bouncing. Therefore, it is very preferable to use a leaf spring or the like to directly push the blade traveling at a high speed in the optical axis direction to brake the blade. However, such a braking method has a drawback in that the charge torque increases because the force pressing the blade in the optical axis direction also acts during shutter charge. In view of this, it is conceivable to operate the pressing / releasing by the leaf spring using an electronic circuit that controls the shutter opening / closing operation. In this case, an electromagnetic actuator is required. However, it is not very realistic to arrange such components in the running area of the blade in the shutter having the above-described configuration.
[0008]
The present invention has been made in order to solve such a problem, and an object of the present invention is to provide a brake pressing force against a shutter blade mechanically and reliably acting in conjunction with the operation of the shutter blade. Thus, there is provided a focal plane shutter for a camera in which the pressing force is released when the shutter is charged.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a focal plane shutter for a camera according to the present invention includes two substrates each having an aperture at a substantially central portion and forming two blade chambers by dividing the two with an intermediate plate. One end of each of the plurality of blades is separately arranged in the blade chamber, and one end of each of the plurality of blades is pivotally supported by a plurality of arms, and the bases of the two arms are pivotally attached to one of the substrates at a position lateral to the aperture. A first blade group and a second blade group configured to open and close the aperture by reciprocating arms; and a first blade group and a second blade respectively rotatably attached to one of the substrates at the lateral position. A first driving member and a second driving member for reciprocating the arms of the two blade groups, and a rotational urging force in one direction applied to one of the substrates at a position above or below the aperture; One end is attached to the operating trajectory of the first drive member and the other end faces the blade chamber of the first blade group in a region where the other end of the blade of the first blade group travels. An interlocking lever, the interlocking lever being moved against the urging force by a first driving member immediately before the end of the exposure travel of the first blade group, and causing the blades of the first blade group to move by the other end. The pressure is applied in a direction substantially perpendicular to the surface, and in the initial stage of the charging operation of the first drive member, the urging force follows the first drive member to release the pressure on the blade surface.
[0010]
Further, the focal plane shutter for a camera of the present invention is preferably provided with a rotational urging force in one direction applied to one of the substrates at one of the upper and lower positions of the aperture and attached to one end. Another interlocking lever facing the operating trajectory of the second driving member and having the other end facing the blade chamber of the second blade group in a region where the other end of the blade of the second blade group travels, The interlocking lever is moved by the second driving member against the urging force immediately before the end of the exposure travel of the second blade group, and the other end portion causes the blades of the second blade group to be substantially perpendicular to the blade surface. In the initial stage of the charging operation of the second driving member, the urging force follows the second driving member to release the pressing.
[0011]
Preferably, the focal plane shutter for a camera according to the present invention is rotatably attached to one of the substrates at the one side position and applies braking to the driving member immediately before the end of the exposure travel of the blade group. A brake member is provided, and the interlocking lever can be operated via the brake member.
In the focal plane shutter for a camera according to the present invention, preferably, the other end of the interlocking lever is formed as a bent portion, and the end is formed with a hole or a hole formed in a substrate to which the interlocking lever is attached. It penetrates the notch and faces the blade chamber, and the end face of the hole or the notch serves as a stopper when the interlocking lever is operated by the urging force.
[0012]
Further, in the focal plane shutter for a camera according to the present invention, preferably, a pressing plate is disposed in the blade chamber, and the other end portion presses the pressing plate immediately before the end of the exposure run of the blade group, and the pressing plate Thereby, the blades of the blade group are pressed in a direction substantially perpendicular to the blade surface.
In the focal plane shutter for a camera according to the present invention, preferably, the pressing plate is formed with a convex portion protruding out of a blade chamber in which the pressing plate is housed. 6. The focal plane shutter for a camera according to claim 5, wherein the other end pushes the convex portion.
Further, in the focal plane shutter for a camera according to the present invention, preferably, the driving members and the interlocking lever are attached to one of the substrates, and a second blade group is provided in a blade chamber between the substrate and the intermediate plate. And a first blade group is disposed in a blade chamber between the intermediate plate and the other substrate, the first blade group is a rear blade group, and the second blade group is a front blade group. To be configured.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to five illustrated examples. FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a view showing only related parts of a rear blade group, and is seen through the rear blade group in a superimposed state. FIG. 2 is a plan view, and FIG. 2 is a right side view of FIG. FIG. 3 is a plan view of the rear blade group in an unfolded state viewed in the same manner as in FIG. 1, and FIG. 4 is a right side view of FIG. 3 viewed in the same manner as in FIG. FIG. 5A is an enlarged perspective view of a main part of an interlocking lever according to the first embodiment, and FIG. 5B is an enlarged perspective view of a main part showing a modification thereof. FIG. 6 is a right side view showing a modification of the pressing plate according to the first embodiment and viewed in the same manner as FIG. 7 and 8 are plan views of a second embodiment and a third embodiment of the present invention, respectively, showing only a main part.
[0014]
First, the first embodiment of the present invention shown in FIGS. 1 to 4 and FIG. 5A will be described together with the modified examples shown in FIG. 5B and FIG. The substrate 1 has an aperture 1a substantially in the center. As can be seen from FIG. 2, the substrate 1 has the auxiliary substrate 2 attached thereto at a predetermined interval by a plurality of (only two are shown in the drawing) shafts 1b. An intermediate plate 3 is attached to these shafts 1b so as to be movable in the left-right direction in FIG. However, the spacer 4 is attached to the upper and lower two shafts 1b shown in FIG. 2, and the upper shaft 1b spacer 4 regulates the rightward movement of the intermediate plate 3, and the lower shaft 1b. The spacer 4 restricts movement to the left. Although not explicitly shown in the drawings, the auxiliary substrate 2 and the intermediate plate 3 are also formed with an aperture substantially at the center of their plane, and together with the above-mentioned aperture 1a, constitute a rectangular exposure aperture as is well known. are doing.
[0015]
Two blade chambers are formed between the two substrates 1 and 2 and the intermediate plate 3, and a front blade group is provided between the substrate 1 and the intermediate plate 3, and between the intermediate plate 3 and the auxiliary substrate 2. Houses the rear wing group. However, in the present embodiment, since the present invention is applied only to the rear blade group, illustration of the configuration related to the front blade group is omitted. The rear blade group includes five arms 7 (7a, 7b, 7c, 7d, 7e) pivotally supported by two connecting shafts 8 on two arms 5, 6, respectively. The connecting shaft 8 is a rivet component, and its head is crimped to each of the blades 7a, 7b, 7c, 7d, 7e with the head side facing the auxiliary substrate 2. In this embodiment, the two arms 5 and 6 have their bases pivotally attached to the blade chamber side of the substrate 1, but may be pivotally attached to the auxiliary substrate 2. In addition, a plurality of blades are pivotally supported by three or more arms, and two of the blades are pivotally attached to the substrate 1. However, the present invention is also applicable to such a case.
[0016]
As can be seen from FIGS. 2 and 4, in the blade chamber of the rear blade group, a pressing plate 9 and a rear blade pressing plate 10 are arranged so as to sandwich the five blades 7. Each of these plates 9 and 10 is mounted so as to be movable in the left-right direction with respect to the upper and lower two shafts 1b, and both have a U-shape in plan view as shown in FIG. 10 are larger. As shown in FIG. 2, a convex portion 9 a is formed on the pressing plate 9, and projects from a notch 3 a formed on the intermediate plate 3 into the blade chamber of the front blade group. 1 and 3, illustration of the intermediate plate 3 is omitted. The rear blade holding plate 10 has already been described in the description of the conventional example.
[0017]
1 and 3, a rear blade drive member 11 is rotatably mounted on a front surface side of a substrate 1 on a shaft 1c provided upright at a side position of the aperture 1a. The shaft 1c is arranged concentrically with the pivot shaft of the arm 5 described above. A drive pin 11 a is provided upright on the rear side of the rear blade drive member 11, penetrates an arc-shaped hole 1 d formed in the substrate 1, and fits into a hole formed in the arm 5. The driving member 11 is attached with an iron piece member to be attracted to the electromagnet, and a rear blade driving spring is hung thereon.
[0018]
On the front side of the substrate 1, a brake member 12 is rotatably mounted on a shaft 1e provided upright at a position lateral to the aperture 1a. Although not shown, a spring is applied to the brake member 12 to urge the brake member 12 counterclockwise. FIG. 1 shows a state where the brake member 12 is stopped by a stopper (not shown) at a position where a part of the brake member 12 faces the operation locus of the drive pin 11a.
[0019]
Further, on the front side of the substrate 1, an interlocking lever 13 is rotatably mounted on a shaft 1f which is provided upright at a position below the aperture 1a. The interlocking lever 13 is urged clockwise by a spring 14, but its rotation is prevented by a stopper 1g in FIG. In FIG. 1, one end 13 a of the interlocking lever 13 is in contact with the brake member 12. For this reason, a friction member such as a leaf spring is attached to the shaft 1e so that a frictional force acts between the substrate 1 and the brake member 12 without applying the above-described spring to the brake member 12. May be. In this case, as will be understood from the following description, it is necessary that the force of the spring 14 is larger than the friction force of the friction member.
[0020]
The other end portion 13b of the interlocking lever 13 has a bent shape, and faces the notch 1h of the substrate 1 into the blade chamber of the front blade group, and can come into contact with the convex portion 9a of the pressing plate 9. Since the other end portion 13b enters the blade chamber of the front blade group outside the operation area of the blades of the front blade group, it does not affect the operation of the front blade group at all. Further, in this embodiment, the interlocking lever 13 is made of resin and has a shape as shown in FIG. 5 (a), but an example of a shape made of metal is shown in FIG. 5 (b). Have been.
[0021]
Next, the operation of the present embodiment will be described. FIG. 1 shows the superposed state of the rear blade group, that is, the initial position at the start of the exposure travel. In this state, the interlocking lever 13 is urged clockwise by the spring 14, and its rotation is prevented by the stopper 1g. Then, a part of the brake member 12 faces the operating locus of the drive pin 11a, and the other end 13b of the interlocking lever 13 is in a non-contact state with the projection 9a of the pressing plate 9. When the shutter is released, the leading blade group (not shown) starts exposure traveling, and then the trailing blade drive member 11 is released from holding by the not-shown electromagnet and starts traveling clockwise.
[0022]
The exposure travel of the rear blade drive member 11 is rapidly accelerated by a drive spring (not shown), and when the slit forming blade 7a reaches near the lower end edge of the aperture 1a, the drive pin 11a collides with the brake member 12. As a result, the brake member 12 is moved in the clockwise direction, and the interlocking lever 13 is moved in the counterclockwise direction. The spring is applied to the brake member 12 as described above, and the spring 14 is applied to the interlocking lever 13. Since it is hung, the rear blade drive member 11 receives braking. On the other hand, when the interlocking lever 13 is moved in the counterclockwise direction, the other end 13b pushes the projection 9a, and pushes the pressing plate 9 rightward in FIG. Therefore, a braking force is applied to each of the blades 7a, 7b, 7c, 7d, and 7e from a direction substantially perpendicular to those surfaces, and stops at the positions shown in FIGS.
[0023]
When the rear blade driving member 11 is moved counterclockwise from the state shown in FIG. 3 during shutter charging after the exposure traveling, the brake member 12 and the interlocking lever 13 immediately follow the operation. Therefore, the other end portion 13b of the interlocking lever 13 is not in contact with the convex portion 9a, and the pressing force of the pressing plate 9 against the blade 7 is released. Therefore, the blade 7 smoothly rises and is set to the position shown in FIG. FIG. 6 shows an example in which the pressing force of the pressing plate 9 is forcibly released from the blade 7. In this example, the lower end of the pressing plate 9 has a curved surface so that a strong spring property can be imparted. Therefore, when the other end portion 13b of the interlocking lever 13 and the projection 9a come out of contact with each other, the pressing plate 9 moves in a direction to positively move away from the blade 7.
[0024]
In this embodiment, the other end 13b of the interlocking lever 13 presses the projection 9a of the pressing plate 9, but the pressing plate 9 is not formed with the projection 9a. The leading end may face the blade chamber of the rear blade group, and the plate surface below the pressing plate 9 may be directly pressed. Further, in the present embodiment, the pressing plate 9 contacts all of the rear blades 7 and applies a braking force to all or more of the blades. However, the pressing plate 9 contacts only some of the blades, especially only the slit forming blade 7a. Alternatively, a braking force may be applied. In the case of contacting only some of the blades, the pressing plate 9 is not always necessary, and the object can be achieved if the shape of the other end 13b of the interlocking lever 13 is as shown in FIG.
[0025]
Further, the stopper 1g in the present embodiment is not always necessary because the stopper (not shown) is provided on the brake member 12 as described above. The stopper 1g can be omitted by making the other end portion 13b of the interlocking lever 13 abut on the lower end surface of the notch 1h. Further, in the present embodiment, the brake member 12 and the interlocking lever 13 are attached to the substrate 1, but they may be attached to the auxiliary substrate 2. In such a case, the drive pins 11a may be penetrated to the auxiliary substrate 2 side to make contact with the brake member 12. Moreover, in this case, the rear blade holding plate 10 can be used instead of the pressing plate 9 in the embodiment.
[0026]
FIG. 7 shows a second embodiment of the present invention. In the second embodiment, the drive pin 11a of the rear blade drive member 11 is brought into direct contact with one end 13a of the interlocking lever 13 without providing the brake member 12 in the first embodiment. Therefore, only the shape of the one end 13a is different, and the other configuration is completely the same as that of the first embodiment. Therefore, each part is assigned the same reference numeral as that of the first embodiment, and detailed description is omitted. 2, 4, 5 and 6 used in the description of the first embodiment for the same reason can be used as they are in the present embodiment, and all the modified examples described variously are also applied to the present embodiment. it can. According to this embodiment, it is possible to reduce the number of components as compared with the first embodiment.
[0027]
The third embodiment shown in FIG. 8 is an example in which the present invention is applied to a front blade group. The configuration of each blade chamber of this embodiment is exactly the same as that of the first embodiment. Here, the configuration of the rear blade group has been described in detail in the first embodiment, and the front blade group has a configuration in which the rear blade group is substantially turned upside down and is housed in the blade chamber of the front blade group. Therefore, the illustration of the leading blade group is omitted, and only the slit forming blades at the end of the exposure travel are shown by dotted lines. A front blade holding plate having substantially the same shape as that of the above-described rear blade holding plate 10 is attached to the shaft 1b between the substrate 1 and the front blade group in the same manner.
[0028]
In FIG. 8, a front blade driving member 15 is rotatably mounted on a front surface side of a substrate 1 on a shaft 1i provided upright at a side position of the aperture 1a. The rear blade drive member 15 has a drive pin 15a erected on the back side, penetrates an arc-shaped hole 1j formed in the substrate 1, and fits into a hole of an arm (not shown). An interlocking lever 16 is rotatably attached to a shaft 1k erected below the aperture 1a. The interlocking lever 16 is urged clockwise by a spring 17, and one end 16 a of the interlocking lever 16 faces the movement locus of the drive pin 15 a.
[0029]
On the other hand, the other end 16b of the interlocking lever 16 has substantially the same shape as that described in the first embodiment, and penetrates the hole 1m of the substrate 1 and faces the blade chamber of the front blade group. . Therefore, in this case, the lower end surface of the hole 1m serves as a stopper for the clockwise rotation of the interlocking lever 16. Further, in this embodiment, without providing an independent pressing plate, the front blade holding plate is made to perform its function, and the other end portion 16b of the interlocking lever 16 presses the front blade holding plate against the blade. I have. The operation of the present embodiment having such a configuration is substantially the same in terms of function, although there is a difference between the front blade group and the rear blade group, and the description thereof will be omitted.
[0030]
Regardless of whether or not the front blade holding plate is provided, the pressing plate may be provided as in the first embodiment, or the pressing plate may not be provided, and the other end 16b of the interlocking lever 16 may be used. The blades may be pressed directly. Further, the interlocking lever 16 may be attached to the auxiliary board 2 as in the case of the first embodiment.
[0031]
In each of the embodiments described above, the case where the present invention is applied only to the front blade group and the case where the present invention is applied only to the rear blade group are described, but this does not prevent application to both. In this case, both may be provided on the substrate 1 side or the auxiliary substrate 2 side, or may be provided on both substrates one by one.
[0032]
【The invention's effect】
As described above, according to the configuration of the present invention, at the end of the exposure travel of the shutter blade, the brake pressing force that acts from a direction substantially perpendicular to the plane of the shutter blade is mechanically linked to the operation of the shutter drive mechanism. And the pressing force is surely released when the shutter is charged.
[Brief description of the drawings]
FIG. 1 is a perspective plan view of a first embodiment of the present invention, showing a case where a rear blade group is in a superimposed state.
FIG. 2 is a right side view of FIG. 1 with a partial cross section.
FIG. 3 is a plan view of the rear blade group in a deployed state viewed in the same manner as in FIG. 1;
FIG. 4 is a right side view of FIG. 3 viewed in the same manner as FIG. 2;
FIG. 5A is an enlarged perspective view of a main part of an interlocking lever in the first embodiment, and FIG. 5B is an enlarged perspective view of a main part showing a modified example thereof.
FIG. 6 is a right side view showing a modification of the pressing plate in the first embodiment and viewed in the same manner as in FIG. 2;
FIG. 7 is a plan view showing a main part of a second embodiment of the present invention.
FIG. 8 is a plan view showing a main part of a third embodiment of the present invention.
[Explanation of symbols]
Reference Signs List 1 substrate 1a apertures 1b, 1c, 1e, 1f, 1i, 1k shafts 1d, 1j, 1m holes 1g stoppers 1h, 3a notch 2 auxiliary substrate 3 intermediate plate 4 spacer 5, 6 arm 7 (7a, 7b, 7c, 7c) 7d, 7e) Rear blade 8 Connecting shaft 9 Pressing plate 9a Convex portion 10 Rear blade holding plate 11 Rear blade drive member 11a, 15a Drive pin 12 Brake member 13, 16 Interlocking lever 13a, 16a One end 13b, 16b Other end 14 , 17 Spring 15 tip blade drive member

Claims (6)

Two substrates each having an aperture in a substantially central portion and forming two blade chambers by partitioning the two with an intermediate plate, and one end of each of the plurality of blades separately arranged in the blade chamber and having a plurality of blades. A first blade group pivotally supported by an arm, and bases of the two arms are pivotally attached to one of the substrates at a position lateral to the aperture so as to open and close the aperture by reciprocation of the arm; A second driving member, a first driving member and a second driving member rotatably attached to one of the substrates at the side position and reciprocating the arms of the first and second blade groups, respectively; One of the substrates is attached to one of the substrates at one of upper and lower positions of the aperture by applying a rotational biasing force in one direction, and has one end facing the operating path of the first driving member and the other end facing the other end. Part An interlocking lever that faces the blade chamber of the first blade group in a region where the other end of the blades of the blade group travels, wherein the interlocking lever is driven by the first drive immediately before the end of the exposure operation of the first blade group. The member is moved against the urging force and presses the blades of the first blade group in a direction substantially perpendicular to the blade surface by the other end. A focal plane shutter for a camera, wherein a force applied to the first driving member is released by the force and the pressure on the blade surface is released. At one of the upper and lower positions of the aperture, one of the substrates is provided with a rotational urging force applied thereto in one direction, and is attached to the one end so as to face the operation path of the second drive member, and the other end is provided. Is provided in the blade chamber of the second blade group in a region where the other end portion of the blade of the second blade group travels, and the link lever is provided immediately before the end of the exposure travel of the second blade group. Is moved by the second driving member against the urging force, and presses the blades of the second blade group in a direction substantially perpendicular to the blade surface by the other end, so that an initial stage of the charging operation of the second driving member is performed. 2. The focal plane shutter for a camera according to claim 1, wherein the urging force follows the second driving member to release the pressing. A brake member that is rotatably attached to one of the substrates at the one side position and that applies a brake to the driving member immediately before the end of the exposure travel of the blade group; 3. The focal plane shutter for a camera according to claim 1, wherein the focal plane shutter is operable. The other end of the interlocking lever is formed as a bent portion, and the end penetrates a hole or notch formed in a substrate to which the interlocking lever is attached, and faces the blade chamber. 4. The focal plane shutter for a camera according to claim 1, wherein an end surface of the notch serves as a stopper when the interlocking lever is operated by the urging force. 5. A pressing plate is disposed in the blade chamber, and the other end presses the pressing plate immediately before the end of the exposure travel of the blade group, and the pressing plate causes the blades of the blade group to move in a direction substantially perpendicular to the blade surface. The focal plane shutter for a camera according to any one of claims 1 to 4, wherein the focal plane shutter is pressed. The pressing plate has a convex portion protruding out of the blade chamber in which the pressing plate is housed, and the other end presses the convex portion immediately before the end of the exposure travel of the blade group. The focal plane shutter for a camera according to claim 5, characterized in that:

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