JP2003228094A - Shutter device and camera using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To take a stroboscopic photograph of a moving subject with natural description although constitution is simple. <P>SOLUTION: With a shutter button 18 pressed, a rod type lever 65 moves down, a lock lever part 58 comes out of a flank of a projection 63a, and a rotary lever 57 is rotated clockwise. Shutter blades 51 and 52 are being opened and a rod type projection 60a is pressing a contact piece 37a up. The shutter blades 51 and 52 are fully opened and the contact piece 37a is disengaged from the rod type projection 60a and made to abut against a rod type projection 60b. An unlock lever part 59 pushes a lock lever 72, a shutter set lever 71 is unlocked to rotate clockwise, and a rotary lever 57 is rotated counterclockwise. In the middle of the closure of the shutter blades 51 and 52, the rod type projection 60a pushes the contact piece 37a up to contact a contact piece 37b and a synchro shutter 37 is turned on to carry out stroboscopic light emission. Then the shutter blades 51 and 52 are completely closed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device having a simple structure and capable of stroboscopically photographing a moving subject with a natural depiction without a sense of discomfort, and a camera using the same.

[0002]

2. Description of the Related Art A simple camera which is provided at a low cost by omitting a focus adjusting mechanism and an exposure adjusting mechanism is commercially available. In addition, the photo film is pre-loaded at the time of manufacture, and if you submit it to the development shop as it is after the shooting without the troublesome operation of rewinding and taking out the photo film cartridge, the developed photo film and print There is a lens-fitted film unit on the market, which is an inexpensive one-time-use camera capable of receiving pictures and photos.

In such a camera, the structure is thoroughly simplified and the cost is reduced. Specifically, the taking lens is a simple fixed-focus lens composed of one or two lenses, and the shutter device is a so-called kick-off type shutter device. Kick-off type shutters open and close the shutter blades by reciprocally rotating the shutter blades by biasing the rotary shutter blades to a closed position with a return spring and kicking this in the direction opposite to the biasing direction. Is.

By the way, a simple camera such as a lens-fitted film unit which is generally commercially available is designed so as to obtain an appropriate exposure in a daylight shooting in the outdoors at the time of fine weather. Strobe shooting is performed under shooting conditions where the amount of shooting light is insufficient. However, in this stroboscopic photography, the difference in brightness between the main subject that the strobe light reaches and the distant background that the strobe light does not reach is extremely large, and the main subject will be properly exposed.
The background becomes dark like at night, and the image looks unnatural, with only the main subject appearing.

There is known a lens-fitted film unit capable of resolving such drawbacks and performing natural background depiction during flash photography (Japanese Patent Laid-Open No. 2001-22035).
Issue). This lens-fitted film unit uses a strobe device with a relatively small guide number (4.71) and a high-sensitivity film (ISO800), and when the strobe device is on, a large aperture opening (F5.6) having a large aperture value. ) Is inserted into the optical axis, and the tension of the return spring of the shutter blade is weakened to reduce the shutter speed (1/60 seconds) to perform photographing. This makes it possible to imprint the background with almost proper exposure without overexposing the main subject. Note that when the strobe device is turned off, a small aperture opening of F16 is inserted into the optical axis, and the tension of the return spring of the shutter blade is strengthened to increase the shutter speed (1/150 seconds) for shooting.

[0006]

By the way, in the lens-fitted film unit described in the above publication, strobe light is emitted in the process of opening the shutter, as shown in FIG. 15 (A). Therefore, when a moving subject 90 is stroboscopically photographed, the main image α exposed by the strobe light is
Since the sub-image β is exposed before the sub-image β that is exposed to natural light without flash emission, the sub-image β is reflected on the moving destination (future side) of the main image α on the screen, which is unnatural that does not match the general sense. It becomes a photograph. Therefore, the same figure (B)
As shown in FIG. 5, if the stroboscopic light emission is performed in the process of closing the shutter, after the sub-image β is exposed, the main image α
Is exposed, the sub-image β is reflected on the screen behind (the past side of) the movement of the main image α, and a natural photograph without any discomfort can be taken. However, a simple camera shutter device such as a lens-fitted film unit whose absolute requirement is low cost has not been able to achieve a structure in which strobe light is emitted in the process of closing the shutter.

The present invention has been made to solve the above-mentioned problems, and has a simple structure, and a shutter device capable of stroboscopically photographing a moving subject with a natural depiction without a sense of discomfort. The purpose is to provide the used camera.

[0008]

To achieve the above object, the shutter device of the present invention cooperates between a closed position for closing a predetermined exposure opening and an open position for opening the exposure opening. By engaging the two shutter blades that rotate in opposite directions and the two shutter blades, the lock is released in response to the release operation, and the shutter blades are normally rotated by the spring bias to move the shutter blades. After rotating the shutter blade from the closed position to the open position and rotating the shutter blade to the open position,
A shutter closing member that engages the rotating member and reverses it against the spring bias to rotate the shutter blade from the open position to the closed position, and the shutter blade from the open position to the closed position. It is composed of a synchro switch that is turned on during rotation and emits a strobe light. Also,
A small aperture plate having a small aperture opening having a diameter smaller than that of the exposure aperture is provided so as to be freely inserted into and removed from the photographing optical path, and the small aperture opening of the small diaphragm plate is inserted into the photographing optical path when strobe light emission is not performed. . The camera of the present invention is the camera according to claim 1.
Alternatively, the shutter device described in 2 is used.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 1, a lens-fitted film unit 1 embodying the present invention comprises a unit body 1
A label 11 for makeup is attached to the center of No. 0 in the form of a seaweed roll. A finder objective window 12 and a photographing window 14 exposing the photographing lens 13 are provided on the front surface of the unit body 10. The label 11 is formed with openings that expose the viewfinder objective window 12, the photographing window 14, and the like.

A strobe switch 16 is attached to the side of the photographing window 14, and a strobe light emission window 17 is provided above it. Strobe switch 16
Is the position where the flash charging is turned on and the position where it is turned off.
It is mounted slidably between positions. The photographing lens 13 has, for example, a brightness of F4 and a focal length of f.
Is 30 mm, and the focus setting position is set to 3 m from the film surface.

A shutter button 18, a film counter window 19, and a strobe charge completion display window 21 are formed on the upper surface of the lens-fitted film unit 1, and a winding knob 22 and a viewfinder eyepiece window (see FIG. 2) are formed on the rear surface thereof. And reference numeral 23) are provided.

As shown in FIG. 2, the unit body 10 is
A main body base 29 in which a shutter device 26 and a strobe device 27 are provided in the center, and a front cover 3 which covers the front and rear thereof.
1 and a rear cover 32, and a 135-type photographic film cartridge 33 and a photographic film 35 which is pulled out from the cartridge main body 34 to be in a roll form. In the present embodiment, the film sensitivity of the photographic film 35 is set to IS.
It is set to O1600.

The cartridge main body 34 and the photographic film 35
Is a cartridge storage room 29 formed in the main body base 29.
a, the unit main body 10 is provided in the film storage chamber 29b, respectively.
Is pre-assembled at the time of manufacturing. Below the rear cover 32, bottom lids 32a and 32b that integrally cover the bottom openings of the cartridge storage chamber 29a and the film storage chamber 29b in a light-tight manner are integrally formed. The bottom lid 32a is for the photo film 3 that has been taken.
5 is opened when the photo film cartridge 33 in which the film 5 is caught is taken out.

The winding knob 22 is provided in the cartridge storage chamber 29.
A winding shaft, which is attached to the upper portion of a and is integrally formed on the lower surface thereof, engages with the spool of the photographic film cartridge 33. By rotating the winding knob 22 for each photographing, the photographed film 35 having been photographed is wound into the cartridge body 34 one frame at a time. The shutter mechanism incorporated in the shutter device 26 is charged for the next shooting in synchronization with the film frame winding.
When the film one frame feeding is completed, the shutter device 26
The rotation of the winding knob 22 is locked by a lock lever incorporated in the.

Above the shutter device 26, a finder mechanism is assembled in addition to the shutter mechanism and the winding mechanism. An exposure frame is formed on the back surface of the shutter device 26, and the exposure range for one frame is limited by the front surface of the photographic film 35 sent to the shooting position.

The strobe device 27 includes a main condenser 3
6, a synchro switch 37, a circuit board 38 to which circuit components such as a booster coil are attached, a light emitting portion 39 including a strobe discharge tube, a reflector, and the like, and a power supply battery 41.
A circuit pattern is printed on the circuit board 38, and various circuit elements are attached to form a strobe circuit. On the front surface of the circuit board 38, a pair of contact pieces 4
Two are provided. The synchro switch 37 includes a pair of contact pieces 37a, 37b facing each other with a slight distance therebetween.
(See Fig. 3), and when these contact (short circuit),
The synchro switch 37 is turned on.

A strobe switch 16 is slidably mounted on the front surface of the circuit board 38 via a receiving plate 43, and an operation switch for electrically connecting the contact piece 42 is provided on the back surface of the strobe switch 16. It is installed. When the strobe switch 16 is slid to the on position, this actuation switch connects the contact pieces 42 to each other to start strobe charging.

On the side of the flash switch 16,
A slender triangular lever 16a is integrally formed. As shown in FIG. 3, the lever 16a is engaged with a pin 45a that is integrally provided on one end side of a small aperture plate 45 that forms a part of the shutter device 26. Small aperture plate 4
Reference numeral 5 is attached so as to be rotatable about a shaft 46 of the shutter device 26, and is biased clockwise by a torsion spring 47. That is, the small aperture plate 45 is always biased in the direction in which the small aperture opening 45b formed on the other end side is inserted into the photographing optical axis L of the lens 13. The pin engaged with the torsion spring 47 is not shown.

When the strobe switch 16 is in the ON position, the lever 16a prevents the small aperture plate 45 from rotating clockwise, and the small aperture opening 45b is retracted from the photographing optical axis L. Is in the off position, the small diaphragm plate 45 is rotated clockwise by the urging force of the spring 47 to insert the small diaphragm opening 45b into the photographing optical axis L, and the normal light photographing is performed outdoors in fine weather. Suitable for F16. The F value of the small aperture opening 45b is preferably in the range of F11 to F22, and can be arbitrarily selected from this range.

The shutter device 26 is based on a dark box base 48 which is formed by projecting in the shape of a rectangular tube toward the front of the main body base 29, and an exposure opening 48a which is an F4 open stop is formed on the front surface thereof. Has been done. This exposure opening 4
Two shutter blades 51 and 52 for opening and closing the exposure opening 48a are provided between the shaft 8 and the small aperture plate 45, respectively.
It is attached so as to be rotatable around 3, 54.

Engagement holes 51a and 52a are formed in the shutter blades 51 and 52, and a shutter drive shaft 55 is formed therein.
Has been inserted. The shutter drive shaft 55 is integrally provided at the tip of the shutter drive lever portion 56. The shutter drive lever portion 56 is one of the lever portions that constitute the rotation lever 57. The rotation lever 57 includes the shutter drive lever portion 56, a locking lever portion 58, a locking release lever portion 59, and a synchro lever. It is composed of the unit 60. The rotating lever 57 is rotatably attached to a shaft 48b integrally formed on the front surface of the dark box base 48, and is biased clockwise by a torsion spring 61. The torsion spring 61
Is bridged between a pin 48c provided on the front surface of the dark box base 48 and a pin 59a provided on the back surface of the lock release lever portion 59.

On the side of the rotating lever 57, a slender plate-like rod lever 63 biased upward by a spring 62 is provided so as to be vertically movable. A flat plate-shaped projection 63a protruding forward is integrally formed on the lower portion of the rod-shaped lever 63, and a locking lever portion 58 is formed on the side surface 64.
The rotation lever 57 is locked at the initial position by the contact of the end surface 58a (see FIG. 4).

The upper portion 63b of the rod-shaped lever 63 is bent in an L shape, and the lower surface of the shutter button 18 is in contact with this. That is, when the shutter button 18 is pressed, the rod-shaped lever 63 is pushed downward against the bias of the spring 62, the end surface 58a of the locking lever portion 58 is disengaged from the side surface 64 of the projection 63a, and the torsion spring 61 is used. The rotating lever 57 is rotated clockwise.

At the tip of the synchro lever 60,
A pair of rod-shaped projections 60a and 60b are formed, and these are synchronized with the rotation of the rotation lever 57.
When the shutter blades 51 and 52 are closed, the synchro switch 37 is turned on.

As will be described later in detail, the lock release lever portion 59 is provided with the protrusion 7 of the lock lever 72 in accordance with the rotation of the rotation lever 57 during the opening operation of the shutter blades 51 and 52.
2a is pushed and the locking lever 72 is rotated to release the locked state of the shutter set lever 71.

On the upper part of the dark box base 48, a shutter stop lever 73, a locking lever 72, a winding stop lever 73, a cam 74, and a counter display plate 75 are rotatably attached. Stop lever 7
2. The winding stop lever 73 is provided with torsion springs 76, 7 respectively.
7,78 are provided. In the shutter set lever 71, in addition to the protrusion 71a, a spring receiving portion 71b,
Cam follower 71c, protrusions 71d, 71e (see FIG. 9)
Are provided integrally.

The cam 74 is inserted through the boss 48d and is connected to the sprocket 65 arranged near the aperture. Further, the cam 74 is provided with a notch 74a and a convex portion 74b. The cam 74 makes one rotation for each frame feeding of the photo film 35, and the feeding claw 73a of the winding stop lever 73 is engaged with the notch 74a to stop the feeding of the photo film 35.

The winding stop lever 73 is rotatably attached to the shaft 48e, and rotates between a locking position for locking the shutter setting lever 71 at the charging position and a releasing position for releasing this locking. The winding stop lever 73 includes, in addition to the locking claw 73a, a spring receiving portion 73b, a locking portion 73c, and a protrusion 7.
3d and a release portion 73e are integrally provided. The locking portion 73c is a groove 22a formed around the winding knob 22 when the winding stop lever 73 rotates clockwise in the drawing.
(See FIG. 9) to lock the rotation of the winding knob 22.

The protrusion 73d is provided on the lower portion of the winding stop lever 73, and engages with the protrusion 71d of the shutter set lever 71 to hold the shutter set lever 71 at the charge position when the shutter is charged. Further, in response to the pressing operation of the shutter button 18, the shutter button 18 rotates around the shaft hole 18a, and the pressing portion 18b formed integrally with the shutter button 18 is released.
3e is pressed, and the winding stop lever 73 rotates counterclockwise in the figure against the bias of the torsion spring 78.

In addition to the protrusion 72a, the locking lever 72 includes
A locking projection 72b is formed which engages with the projection 71e of the shutter set lever 71 and locks the locking lever 72 at the initial position.

Next, the operation of the above configuration will be described with reference to FIGS.
This will be described with reference to FIG. 4 and 9 show the initial state of the shutter device 26, and hereinafter, FIG. 5 and FIG. 10, FIG. 6 and FIG. 11, FIG. 7 and FIG. 12, and FIG. Indicates the status. In a scene where a main subject such as a person is shot against a slightly dark landscape such as a sunset scene,
First, the strobe switch 16 is slid to the on position to start strobe charging. As a result, the lever 16a blocks the clockwise rotation of the small aperture plate 45, and the small aperture opening 45b retracts from the photographing optical axis L.

In FIG. 4, which shows the state near the shutter blades in the initial state of the shutter device 26, the rotating lever 5 is shown.
The end surface 58a of the locking lever portion 58 of No. 7 abuts the side surface 64 of the protrusion 63a, and the rotary lever 57 is locked at the initial position. Further, the shutter blades 51 and 52 are both in the closed position and cooperate with each other to close the exposure opening 48a.

When the shutter button 18 is pushed down from this initial state, as shown in FIG.
Rotates about the shaft hole 18a, and the pressing portion 18b presses the release portion 73e. As a result, first, the winding stop lever 73 rotates counterclockwise against the bias of the torsion spring 78 from the initial state shown in FIG. 9, and the locking claw 73a is disengaged from the notch 74a of the cam 74, at the same time. The locking portion 73c has the groove 22a.
And the winding knob 22 becomes free (Fig. 10
reference).

When the shutter button 18 pushes the upper portion 63b and the rod-shaped lever 63 is pushed downward, the end surface 58a of the locking lever portion 58 is disengaged from the side surface 64 of the protrusion 63a, and the turning lever 61 is biased by the turning lever 61. 57 starts rotating clockwise. As a result, the shutter drive shaft 55
Pushes down the edges of the engaging holes 51a, 52a downward, the shutter blades 51, 52 open the exposure opening 48a, and the rod-shaped projection 60a pushes down the contact piece 37a.

As shown in FIG. 6, when the rotation lever 57 is rotated so that the shutter blades 51 and 52 are fully opened and the exposure opening 48a is completely exposed, the contact piece 37a is brought into contact with the rod-shaped projection 6a.
It comes off from 0a and comes into contact with the rod-shaped projection 60b in an attempt to return to the initial position by its elasticity. As a result, the contact piece 37
Since a is prevented from coming into contact with the contact piece 37b, the synchronizing switch 37 is opened during the opening operation of the shutter blades 51 and 52.
Never turns on.

When the shutter blades 51 and 52 are fully opened, F
The exposure is performed by the exposure opening 48a of No. 4 in FIG. This exposure time is, for example, about 1/60 second. Photo film 35
Since the film sensitivity of ISO is 1600, the light value LV
It is possible to capture the background at dusk, which is exposed up to 6, and the interior of the room, to which the strobe light hardly reaches, to some extent.

Immediately after the shutter blades 51, 52 are fully opened, the lock release lever portion 59 causes the lock lever 72 to project.
2a is pushed to rotate the locking lever 72 to release the locked state of the shutter set lever 71 (see FIG. 11). Since the biasing force of the torsion spring 76 is set to be stronger than the biasing force of the torsion spring 61, the projection 71a of the shutter set lever 71 causes the locking release lever 59 to move to the right in the drawing as shown in FIG. Push from one direction to the left, turning lever 5
7 is rotated counterclockwise (see FIG. 12).

The rotation of the rotation lever 57 in the counterclockwise direction is
Since it is performed against the biasing force of the torsion spring 61, the rotation speed of the rotation lever 57 (shown by the inclined line Q in FIG. 14) is set so that the shutter blades 51 and 52 are opened by the biasing force of only the torsion spring 61. Rotational speed during operation (indicated by inclined line P in FIG. 14)
It becomes slower and the shutter blades 51 and 52 are closed slightly slowly.

The shutter blades 51 and 52 are closed, and the aperture formed by the shutter blades 51 and 52 is about F10 (indicated by reference numeral 81 in FIG. 14).
The bar-shaped projection 60a pushes up the contact piece 37a from below, and the contact piece 3a
Contact 7b. As a result, the synchro switch 37
Is turned on, and strobe light is emitted from the strobe light emitting section 39. The shaded portion indicated by reference numeral 82 in FIG.
The amount of exposure is shown.

As the rotation lever 57 further rotates, as shown in FIG. 8, the shutter blades 51 and 52 open the exposure opening 48.
When a is completely closed, the contact piece 37a is disengaged from the rod-shaped projection 60a and the contact with the contact piece 37b is released. Further, the cam follower 71c comes into contact with the peripheral surface of the convex portion 74b of the cam 74,
The clockwise rotation of the shutter set lever 71 is stopped (see FIG. 13).

From the state shown in FIG. 8, the shutter button 18
When the pressing operation on is stopped, the rod-shaped lever 63 is raised by the spring 62. The lower surface of the tip of the locking lever portion 58 is
Since it has a gentle arc shape as shown in the drawing, even if the corner of the locking lever portion 58 slightly hits the tip of the locking lever portion 58, it does not stop midway and returns to the initial position shown in FIG. To do. From this, in order to prepare for the next photographing, the winding knob 22 is rotated to rotate the convex portion 74b of the cam 74, the shutter set lever 71 is returned to the shutter set position, and the locking release lever portion by the protrusion 71a. Even if the counterclockwise urging of the turning lever 57 by 59 is released, the end surface 58a of the locking lever portion 58 contacts the side surface 64 of the protrusion 63a, and the turning lever 57 rotates clockwise. Instead, it is stopped at the initial position.

As described above, even in a scene with insufficient light quantity such as a commemorative photo at dusk, the background of the background is reflected to some extent by the bright open aperture of F4, and the shutter blade 5
Since the stroboscopic light emission is performed in a small aperture state of about F10 in the process of closing 1,52, the subject image is sharp, and even in the case of a moving subject, the direction in which the image flows matches the normal sense, You can get a natural-looking photo without any discomfort.

When the flash photography is not performed, the flash switch 16 is set to the off position. Lever 16a
Moves downward and the small diaphragm plate 45 retracted from the photographing optical axis L is rotated clockwise by the urging force of the spring 47 to insert the small diaphragm opening 45b into the photographing optical axis L. F16
become. When the shutter button 18 is pushed down in this state, the shutter blades 51 and 52 open and close the exposure opening 48a, so that a sharp subject image can be obtained.

In the embodiment described above, the exposure aperture (open aperture aperture) is F4, the aperture aperture being closed by the shutter blades is about F10, and the F value of the small aperture aperture of the small aperture plate is F16. Of course, the invention is not limited to these numerical values. Further, it goes without saying that the shutter speed and the film sensitivity of the photographic film described above are not limited.
Further, although the focus setting position is set to 3 m, the present invention is not limited to this and may be set to 2 m, for example. The focal length f of the taking lens is set to 30 mm, but is 35 mm, for example.
May be

In the above embodiment, the film unit with a lens is used. However, the present invention is not limited to this, and although the focus adjusting mechanism and the automatic exposure adjusting mechanism are omitted, the film can be replaced with a simple camera. But it's okay. Further, in the above embodiment, a simple strobe device in which the flash time of the strobe light is almost constant is used, but, for example, the reflected light from the subject is photoelectrically converted by the light receiving element, the photocurrent is stored in the capacitor, and the integration is performed. An automatic strobe device may be used which checks the capacity and outputs a light emission stop signal when the capacity is reached. In this case, the main subject can be photographed almost always with proper exposure.

[0046]

As described above in detail, in the shutter device of the present invention and the camera using the same, after the shutter blade is opened by the rotating member, the shutter closing member resists the spring bias of the rotating member. Then, the shutter blades are closed and the shutter blades are closed, and strobe light is emitted during this closing, so the main image exposed by the strobe light is exposed after the sub-image exposed by natural light, and is displayed on the screen. After the main image is moved (past side), the secondary image appears. Therefore, even with a simple structure, a moving subject can be photographed with a strobe with a natural depiction. Moreover, the shutter speed becomes slower when the shutter blades are closed than when the shutter blades are opened, and strobe light is emitted during this, so even if there is some variation in the timing of strobe light emission, the aperture opening during strobe light emission Variations in size are reduced, and stable results can always be obtained. Further, since the small aperture opening of the small aperture plate is inserted into the photographing optical path when stroboscopic photography is not performed, it is possible to obtain a sharp image even when performing normal light photography outdoors in fine weather.

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a lens-fitted film unit.

FIG. 2 is an exploded perspective view of a lens-fitted film unit.

FIG. 3 is an exploded perspective view of a shutter device.

FIG. 4 is an explanatory diagram showing a relationship among a shutter button, a rotating lever, shutter blades, a synchro switch and the like in an initial state of the shutter device.

FIG. 5 is an explanatory diagram showing a state during an opening operation of shutter blades.

FIG. 6 is an explanatory diagram showing a fully opened state of shutter blades.

FIG. 7 is an explanatory diagram showing a state in which a synchro switch is turned on during a closing operation of shutter blades.

FIG. 8 is an explanatory diagram showing a state where shutter blades are completely closed.

FIG. 9 is an explanatory diagram showing a relationship among a shutter set lever, a locking lever, a winding stop lever, a cam and the like in an initial state of the shutter device.

FIG. 10 is an explanatory diagram showing a state immediately after a shutter button is pressed.

FIG. 11 is an explanatory diagram showing a state immediately after the lock release lever portion pushes the lock lever to release the lock of the shutter set lever.

FIG. 12 is an explanatory diagram showing a state immediately after the shutter set lever starts rotating.

FIG. 13 is an explanatory diagram showing a state in which the rotation of the shutter set lever is completed.

FIG. 14 is a graph showing changes in the amount of exposure on a photographic film.

FIG. 15 is an explanatory diagram showing a difference in effect between the case where synchronization is performed during the opening operation of the shutter blade (A) and the case where synchronization is performed during the closing operation of the shutter (B).

[Explanation of symbols]

1 Film unit with lens 18 Shutter button 26 Shutter device 27 Strobe device 37 Synchro switch 37a, 37b contact piece 45 small aperture plate 45b Small aperture opening 48a exposure opening 51,52 Shutter blade 55 Shutter drive shaft 56 Shutter drive lever 57 Rotating lever 58 Locking lever part 58a end face 59 Lock release lever 60 Synchro lever part 60a, 60b Rod-shaped protrusion 63 bar lever 64 side 71 Shutter set lever 71a, 72a Projection 72 Locking lever 73 Winding stop lever

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03B 9/70 G03B 9/70 A 15/05 15/05 G03C 3/00 575 G03C 3/00 575B 575C F Term (reference) 2H002 AB05 CD14 2H053 AB04 AD03 AD25 BA78 2H080 AA19 CC05 2H081 AA48 BB01 BB26 CC02 CC62 DD00 2H082 CC06 CC24

Claims (3)

[Claims] 1. A pair of shutter blades, which cooperate with each other, to rotate in opposite directions between a closed position for closing a predetermined exposure opening and an open position for opening the exposure opening, and the two shutter blades. A rotating member that engages with the blades, is unlocked in response to a release operation, and is normally rotated by a spring bias to rotate the shutter blades from a closed position to an open position; and the shutter blades are opened. A shutter closing member that engages with the rotating member and reverses it against the spring bias after rotating to the position to rotate the shutter blade from the open position to the closed position; Is a shutter switch that is turned on while rotating from the open position to the closed position and emits flash light. 2. A small aperture plate having a small aperture opening having a diameter smaller than that of the exposure aperture is provided in an optical path for photographing so as to be freely inserted and removed.
2. The shutter device according to claim 1, wherein a small aperture opening of the small aperture plate is inserted in a photographing optical path when strobe light is not emitted. 3. A camera using the shutter device according to claim 1 or 2.