JP2003344976A - Film unit equipped with lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film unit equipped with a lens wherein the emission of strobe light is appropriately synchronized even in the case a shutter speed is switched. <P>SOLUTION: A stop lever 49 is freely rotatably attached on the upper surface of a light shielding barrel, and a pad 54 is moved between a high speed shutter position where the pad 54 comes into contact with the rear side of the free end of the lower metal armature 30b of a synchro-switch 30 and a low speed shutter position where the pad 54 is separated from the free end. As the shutter is released in the state where the stop lever 49 is located in the high-speed shutter position, the upper metal armature 30a is pressed by the synchro- projection 43d of a shutter blade 38 rotated to the full open position, and then, the upper metal armature 30a comes into contact with the lower metal armature 30b so as to emit the strobe light. Since the lower metal armature 30b comes into contact with the pad 54 and the rotation of the shutter blade 38 is interrupted halfway, the shutter blade 38 returns to the closed position in a short time. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-fitted film unit, and more particularly to a lens-fitted film unit whose shutter speed can be switched.

[0002]

2. Description of the Related Art Various lens-fitted photo film units having a simple photographing mechanism and into which a photo film is loaded at the time of manufacture are manufactured and sold. Further, some film units with lenses have a strobe device incorporated therein to enable shooting even under indoor or night conditions.

A kick-off type shutter mechanism using one shutter blade is used in the lens-fitted film unit. Synchronizing the shutter mechanism with the strobe device is provided integrally with a synchro switch having a pair of metal contact pieces connected to a strobe circuit, and shutter blades. A pressing portion that contacts the metal contact piece is used.

In the kick-off type shutter mechanism, a stopper is installed in the movement path of the shutter blade, and the movement of the shutter blade is restricted by this stopper.
I was adjusting the shutter speed.

In the conventional lens-fitted film unit,
When strobe shooting was performed in a dark room or at night, the main subject within the strobe light range could be shot with proper exposure. However, the background, which is farther than the strobe light reaching distance, was taken dark because the amount of light taken in was small. To solve this, Japanese Patent Laid-Open No. 11-3269
Japanese Patent No. 87 discloses a film unit with a lens that switches a shutter speed by moving a stopper during flash photography.

[0006]

In recent years, the lens-fitted film unit has a high shutter speed due to the use of a high-sensitivity film and the improvement of the F value of the taking lens, so that the occurrence of camera shake is less likely to occur. However, in the kick-off type shutter mechanism and synchro switch, when the shutter speed becomes high, the full-open time of the exposure aperture becomes short, and it becomes difficult to make the strobe emit light at this timing. Further, the metal contact piece of the synchro switch is elastically deformed when pressed by the pressing portion of the shutter blade, but if the deformation amount changes even a small amount, the strobe cannot emit light within a short full opening time of the shutter blade.

An object of the present invention is to solve the above problems, and an object thereof is to provide a film unit with a lens capable of appropriately synchronizing stroboscopic light emission even at a high shutter speed.

[0008]

In order to solve the above-mentioned problems, the lens-fitted film unit of the present invention contacts the free end side of the second metal contact piece within or near the movement locus of the pressing portion. Alternatively, a stopper is provided in proximity to the stopper, and when the shutter blade reaches the open position, the stopper receives the pressing portion via the first metal contact piece and the second metal contact piece. As a result, even if the shutter speed is set to a high speed, the strobe light can be reliably emitted.

When the shutter speed can be switched, a stop lever is arranged near the shutter blades, and the stop lever is brought into contact with or close to the free end side of the second metal contact piece. And a low speed shutter position away from the second metal contact piece. At the high-speed shutter position, since the pressing portion is received via the first metal contact piece and the second metal contact piece during the movement of the shutter blade from the fully open position to the moving end position, the shutter speed is surely increased. Strobe light can be emitted.

[0010]

1 is a perspective view showing the external shape of a lens-fitted photo film unit embodying the present invention.
The lens-fitted photo film unit 2 includes a unit main body 3 in which various photographing mechanisms are incorporated, a film cartridge loaded at the time of manufacturing the unit main body 3, and a unit main body 3
Label 4 that is attached so as to be wrapped around the outer periphery of
Consists of. The label 4 is formed with openings for exposing each part of the unit body 3.

On the front surface of the unit main body 3, there are provided a photographing lens 5, a finder 6, a stroboscopic light emitting section 7, a photographing mode selecting section 8 and the like. On the upper surface of the unit body 3,
A shutter button 9, a counter display window 10, a signal opening 11 and the like are provided. From the rear surface of the unit main body 3, a part of the winding knob 12 used for winding the film after photographing is exposed.

The photographing mode selection section 8 comprises an operation opening 14 formed on the front surface of the unit main body 3 and a substantially oval operation member 15 which is movable in the operation opening 14. The operation member 15 includes a first operation position located below the operation opening 14, a second operation position which is slid upward from the first operation position as shown in FIG. 2, and an operation position shown in FIG. And is moved from the second operation position to the third operation position which is rotated clockwise in the drawing.

When the operating member 15 is in the first operating position, the lens-fitted film unit 2 is in the daytime shooting mode with the strobe turned off, the small aperture and the high speed shutter. When the operation member 15 is in the second operation position, the flash is turned on and the daytime synchronized photographing mode of the small aperture and the high speed shutter is set. In the daytime synchronized photographing mode, the signal member 17 is pressed from the upper surface of the lens-fitted film unit 2.
Is projected. The signal member 17 is a light guide, and guides the light of the light emitting element, which is emitted when the strobe charging is completed, to the outside of the unit body 3 to notify that the preparation for photographing is completed.

When the operating member 15 is in the third operating position, the night-time synchro photographing mode of strobe ON, large aperture and low speed shutter is set. In the night-time synchro photographing mode, a plate-shaped light reducing member 19 is inserted from the lower side in front of the strobe light emitting section 7 to reduce the amount of strobe light. A disc-shaped index plate 20 is projected in front of the finder 6. The index plate 20 is visually recognized in the viewfinder 6 to inform the photographer that the lens-fitted film unit 2 is in the night-time synchronized photographing mode.

FIG. 4 is an exploded perspective view showing the structure of the unit body 3. The unit main body 3 includes a main body base 23 in which a 135-type film cartridge 22 is loaded, a strobe unit 24 attached to the front side of the main body base 23, a mode switching mechanism 25 for switching shooting modes, and a main body base 23. The front cover 26 and the rear cover 27 are attached to the front side and the back side.

The strobe unit 24 is composed of a printed circuit board 29 on which various electric parts are attached and a strobe circuit is formed, and a strobe light emitting section 7 including a discharge tube, a reflector, a diffusion plate and the like. Further, the printed circuit board 29 has a metal which constitutes a synchro switch 30 which is turned on in cooperation with a shutter release to emit a strobe light and a charge switch which is turned on / off by moving the operation member 15 of the photographing mode selection unit 8. A contact piece 31 and a battery contact piece 33 that connects the battery 32 to the strobe circuit are attached.

At the center of the front surface of the main body base 23, a light-shielding tube 35 is provided.
Is provided. A shutter charge mechanism, a shutter release mechanism, a film winding mechanism, a film winding mechanism, a film counting mechanism, an aperture switching mechanism, a shutter speed switching mechanism, a photographing optical system, a viewfinder optical system, and the like are incorporated around the light shielding tube 35. ing.

FIG. 5 is an exploded perspective view showing the structures of a shutter release mechanism, an aperture switching mechanism, a shutter speed switching mechanism, and a photographing optical system incorporated around the light shielding tube 35. A rectangular exposure opening 37 is formed on the front surface of the light shielding tube 35. A pin 39 that swingably supports the shutter blade 38 and a pin 41 to which one end of a spring 40 is hooked are provided on the side of the light-shielding cylinder 35.

The shutter blade 38 constituting the shutter release mechanism has a base portion 43 in which a hole 43a for inserting the pin 39 is formed, and an opening / closing portion which is arranged in front of the exposure opening 37 to open and close the exposure opening 37. 44 and the base portion 43
And a connecting portion 45 connecting the opening / closing portion 44. A pin 43b to which the other end of the spring 40 is hooked is attached to the base portion 43.
A projection 43c that is kicked off by the shutter drive lever 47 and a synchro projection 43d that operates the synchro switch 30 of the flash unit 24 are provided. The shutter blade 38 is biased by a spring 40 and is held at a closed position that closes the exposure opening 37.

The shutter drive lever 47 is one of the parts constituting the shutter release mechanism, and is rotated to the charging position in the clockwise direction in the figure by the shutter charge mechanism. Then, when the shutter is released, the shutter blade 3 is rotated toward the release position in the counterclockwise direction in the figure, and at that time, the shutter blade 3
Kick the protrusion 43c of No. 8. Shutter drive lever 47
The shutter blades 38 kicked off by the shutter rotate in the clockwise direction in the figure against the bias of the spring 40. Then, the stopper pin 56a provided on the inner surface of the lens holder 56 is passed through the fully opened position (see FIG. 8) where the exposure opening 37 is fully opened.
It reaches the moving end position (see FIG. 9) where it abuts against, and thereafter returns to the closed position by the urging of the spring 40.

Further, when the shutter blade 38 is rotated to the moving end position, the synchro switch 43 is moved by the synchro projection 43d.
The upper metal contact piece (first metal contact piece) 30a of 0 is pressed and brought into contact with the lower metal contact piece (second metal contact piece) 30b. When the pair of metal contact pieces 30a and 30b come into contact with each other and the synchro switch 30 is turned on, strobe light is emitted from the light emitting section 7 of the strobe unit 24.

A pin 50 for rotatably supporting the stop lever 49 is formed on the upper portion of the lens holder 56. The stop lever 49 includes a boss 51 supported by the pin 50, two arms 52 and 53 protruding from the side surface of the boss 51, and a pad 54 formed at the tip of one arm 52.

The stop lever 49 is, as shown in FIG. 6, a high-speed shutter position where the pad 54 is inserted and abutted below the free end side of the lower metal contact piece 30b of the synchro switch 30, and a position shown in FIG. First, the pad 54 is rotated between the low-speed shutter position for retracting the pad 54 from below the lower metal contact piece 30b.

As shown in FIG. 8, when the shutter release is performed while the pad 54 of the stop lever 49 is in the high-speed shutter position, the synchronizing projection 4 of the shutter blade 38 is formed.
The upper metal contact piece 30a of the synchro switch 30 pressed by 3d comes into contact with the lower metal contact piece 30b, and strobe light is emitted. Since the lower metal contact piece 30b contacts the pad 54, the shutter blade 38 is prevented from rotating midway to the moving end position, that is, at the fully open position. As a result, the shutter blade 38 returns to the closed position in a short time. With this high-speed shutter, for example, a shutter speed of 1/120 second can be obtained.

Further, since the synchro switch 30 is turned on between the synchro projection 43d and the pad 54, the stroboscopic light emission can be surely performed when the exposure opening 58 is fully opened, and the exposure at the time of synchro photography is properly performed. It can be carried out.

Contrary to the above, as shown in FIG. 9, when the pad 54 of the stop lever 49 is in the low speed shutter position, the rotation of the shutter blade 38 becomes large and the shutter blade 38 rotates to the moving end position. This is because the elastic deformation of the metal contact piece 30b becomes free. As a result, the shutter blade 38 takes a long time to return to the closed position, and the shutter speed becomes slow. With this low-speed shutter, for example, 1/4
A shutter speed of 5 seconds can be obtained.

In order to bring the free end side of the lower metal contact piece 30b into contact with the pad 54 of the stop lever 49, the free end side of the lower metal contact piece 30b is formed slightly downward and the pad 54 is lowered. The lower metal contact piece 30b may be slightly lifted by the pad 54 when inserted into the. In addition, an inclined surface is formed on the lower surface of the pin 50 that supports the stop lever 49, and the pad 54 is formed on the lower metal contact piece 3.
The pad 54 may move in the height direction and come into contact with the lower metal contact piece 30b as it approaches the lower side of 0b.

A substantially plate-shaped lens holder 56 is mounted in front of the light-shielding cylinder 35. A cylindrical lens barrel 57 is formed in the center of the front surface of the lens holder 56. Lens barrel 57
An exposure opening 58 is formed inside, and a notch 59 is formed on the side surface of the lens barrel 57. In the lens barrel 57, a first lens 60 and a second lens 61 which constitute the taking lens 5 are provided.
And are stored. The first lens 60 and the second lens 6
A large diaphragm plate 62 that constitutes a diaphragm switching mechanism
A diaphragm switching plate 63 and a spacer 64 that secures an insertion space for the diaphragm switching plate 63 are housed. Large diaphragm plate 6
2 is a circular thin plate and has a large-diameter aperture opening 62 in the center.
a is formed.

On the front surface of the lens holder 56, there is provided a lens holding plate 65 for holding the parts such as the taking lens 5 housed in the lens barrel 57 and the switching ring 68 mounted on the outer periphery of the lens barrel 57 so as not to come off. It is attached.

The diaphragm switching plate 63 is made of a V-shaped thin plate, and has a small diaphragm portion 6 sized to close the large diaphragm opening 62a at one end.
3a is provided. A small-diameter diaphragm opening 63b is formed in the small diaphragm portion 63a. At the other end of the aperture switching plate 63, a hole 63c and a bent long hole 63d are formed. The hole 63c is inserted into a pin 66 formed near the lens barrel 57 of the lens holder 56, and the aperture switching plate 63 is inserted.
Can be swung freely.

The diaphragm switching plate 63 retracts the small diaphragm opening 63b on the photographing optical axis and the small diaphragm portion 63a from the notch 59 to the outside of the lens barrel 57, and the large diaphragm opening 62a.
Is rotated to a large aperture position that exposes the.

A switching ring 68 is rotatably fitted on the outer periphery of the lens barrel 57. On the switching ring 68, a spring hooking pin 68 a to which one end of a spring 70 is hooked, and the diaphragm switching plate 6
3, the link pin 68b inserted into the elongated hole 63d, the pair of holding pins 68c between which the other arm 53 of the stop lever 49 is sandwiched, and the driven pin which is protruded to the rear side and pressed by the photographing mode switching mechanism. 68d is provided.

The other end of the spring 70 is hooked on a pin 71 formed on the lower front surface of the lens holder 56, and the switching ring 6
8 is urged clockwise in the figure. The switching ring 68 urged by the spring 70 is held at a predetermined position by the diaphragm switching plate 63.

The operating member 15 includes a switching plate 7 having a substantially oval shape.
4 is integrally formed, and the switching plate 74 is integrally formed with a pressing lever 75 protruding in the horizontal direction. When the operating member 15 rotates from the second operating position to the third operating position, the pressing lever 75 of the switching plate 74 causes the switching ring 6 to move.
The driven pin 68d of No. 8 is pressed from below. This allows
The switching ring 68 is rotated counterclockwise in the figure.

10 and 11 show the states of the switching ring 68 in the daytime shooting mode and the daytime synchronized shooting mode. The operation member 15 has the first operation position and the second operation position.
When in the operating position, the pressing lever 75 of the operating member 15
Does not contact the driven pin 68d of the switching ring 68. Therefore, the switching ring 68 is held at the initial position by the diaphragm switching plate 63.

When the switching ring 68 is in the initial position,
The small pin portion 6 of the aperture switching plate 63 is linked by the link pin 68b.
3a is inserted into the lens barrel 57. As a result, the small aperture portion 63a closes the large aperture opening 62a and enters the small aperture state.
Further, the pair of holding pins 68c holds the stop lever 49 at the high speed shutter position.

As shown in FIG. 12, the operation member 15 has a second
When rotated from the operating position to the third operating position, the pressing lever 75 presses the driven pin 68d from below to rotate the switching ring 68 counterclockwise in the drawing. This switching ring 6
By the rotation of 8, the diaphragm switching plate 63 pressed by the link pin 68b rotates clockwise in the figure, and the small diaphragm portion 63a is retracted from the optical axis to be in the large diaphragm state. In addition, the pair of holding pins 68c rotate the stop lever 49 to move the pad 5
4 is set to the low speed shutter position.

FIG. 13 is an exploded perspective view showing the structure of the photographing mode switching mechanism 25. The shooting mode switching mechanism 25 is
The operation member 15, a bearing plate 77, a slide plate 78, a receiving plate 79, a dimming lever 80, a dimming plate 87, and a display lever 81 are included.

As shown in FIG. 14, on the front surface of the operating member 15, there is formed a substantially conical finger-holding portion 83 for obtaining a finger grip during operation. A step-like step is formed on the finger-holding portion 83 to improve finger-holding. Further, a hole 83a into which a jig of the inspection machine is inserted is formed at the tip of the finger hooking portion 83. In the inspection of the photographing mode switching mechanism performed after the film unit with lens 2 is completed, the jig 85 of the inspection machine is inserted into the hole 83a of the finger hook portion 83, and the jig 85 slides and rotates in the vertical direction. By doing so, the operation of the shooting mode switching mechanism 25 can be confirmed.

The receiving plate 79 is attached to the front surface of the printed circuit board 29 of the strobe unit 24, and has a slide plate 78.
The bearing plate 77 and the bearing plate 77 are held so as to be slidable in the vertical direction. The operating member 15 is rotatably held by the bearing plate 77. When the operating member 15 is slid from the first operating position to the second operating position, the bearing plate 77 and the slide plate 78 are moved.
And slide up together. When the operating member 15 is rotated from the second operating position to the third operating position, the bearing plate 77
Does not move, and the slide plate 78 is slid further upward.

The slide plate 78 is provided with an engaging portion 78a which engages with the engaging pin 17a of the signal member 17. When the operating member 15 is in the first operating position, the signal member 17 is stored in the unit body 3. When the operating member 15 is operated to the second operating position or the third operating position, the signal member 17 is projected from the upper surface of the unit body 3 in conjunction with the slide of the slide plate 78.

On the back surface of the bearing plate 77, when the operating member 15 is in the second operating position or the third operating position, the slide plate 78 and the receiving plate 79 are penetrated to the strobe unit 24.
Pressing piece 77a for pressing the metal contact piece 31 of the charging switch of
Is provided.

The receiving plate 79 has pins 79a, 7 to which a dimming lever 80 and a display lever 81 are rotatably attached.
9b is provided. The light-reducing plate 87 has a vertical elongated hole 87 a and a horizontal elongated hole 87 b formed below the light-reducing member 19. The front cover 26 is provided in the longitudinal slot 87a.
A plurality of pins formed below the stroboscopic light emitting portion on the inner wall of the front surface of are inserted. As a result, the light-reducing plate 87 is slidable in the vertical direction inside the front cover 26.
The distal end 80a of the dimming lever 80 is provided in the lateral elongated hole 87b.
The link pin 80b formed in is inserted.

In the dimming lever 80, when the operating member 15 is operated to the third operating position, the lift piece 80c is pressed by the dimming projection 74a integrally provided on the switching plate 74, and the counterclockwise direction in the figure. Turn to. At that time, the light reducing plate 87 is lifted by the link pin 80b, and the light reducing member 19 is inserted in front of the strobe light emitting section 7. The display lever 81 is the dimming lever 8
Rotated clockwise in conjunction with the rotation of 0, the viewfinder 6
The index plate 20 is inserted in front of.

Next, the operation of the above embodiment will be described. As shown in FIG. 1, in the lens-fitted film unit 2 in the daytime shooting mode, the operation member 15 of the shooting mode selection unit 8 is slid to the first operation position below the opening 14.

In the daytime photographing mode, as shown in FIG. 10, the switching ring 68 is biased by the spring 70 and is in the initial position. When the switching ring 68 is at the initial position, the aperture switching plate 63 is set to the small aperture position, and the stop lever 49 is set to the high speed shutter position as shown in FIG.

In the daytime shooting mode, the switching plate 74,
Since the bearing plate 77 and the slide plate 78 are located below, the metal contact piece 31 of the charging switch of the strobe unit 24 is not pressed, and the signal member 17 is not projected from the upper surface of the unit body 3. Further, since the dimming protrusion 74a of the switching plate 74 does not contact the lift piece 80c of the dimming lever 80, the dimming member 19 and the index plate 20 are not exposed on the front surface of the lens-fitted film unit 2.

When shooting is performed in the daytime shooting mode, strobe light is not emitted. Further, the state of the aperture is a small aperture state, and as shown in FIG. 8, the stop lever 49 blocks the rotation of the shutter blades 38 on the way, and the shutter speed increases. As a result, it is possible to perform shooting with an exposure suitable for shooting outdoors with high brightness in the daytime.

As shown in FIG. 2, when the operating member 15 of the photographing mode selecting section 8 is slid to the second operating position above the opening 14, the lens-fitted film unit 2 is set to the daytime synchronized photographing mode. .

As shown in FIG. 11, the switching ring 68 is maintained at the initial position even in the daytime synchronized photographing mode. Therefore, similarly to the daytime shooting mode, the small aperture state and the high speed shutter state are set.

Further, in the daytime synchronized photographing mode, the switching plate 74, the bearing plate 77, and the slide plate 78 are slid upward. The metal contact piece 31 of the charging switch of the strobe unit 24 is pressed by the pressing piece 77a of the bearing plate 77 to be turned on, so that the strobe unit 24 performs strobe charging.

The slide plate 78 presses the signal member 17 to project it from the upper surface of the unit body 3. When the strobe charge is completed, the light emitting element provided in the strobe unit 24 lights up or blinks, and the light of this light emitting element is guided to the signal member 17 and emitted to the outside of the unit body 3.

Even in the daytime sync photography mode, the switching plate 74
The projection 74a for dimming is a lift piece 80c of the dimming lever 80.
Does not come into contact with. Therefore, the non-display state of the dimming member 19 and the index plate 20 is maintained.

When shooting in the daytime synchronized shooting mode,
The flash fires. Because of the small aperture state and the high-speed shutter state, it is possible to perform shooting with an exposure suitable for synchronized shooting outdoors in the daytime with high brightness. Further, as shown in FIG. 8, stroboscopic light emission is performed when the shutter blade 38 is at the fully open position, so that appropriate synchronized photography can be performed even at a high shutter speed.

As shown in FIG. 3, when the operating member 15 of the photographing mode selection section 8 is rotated from the second operating position to the third operating position, the lens-fitted film unit 2 is set to the night-time synchronized photographing mode. .

As shown in FIG. 12, in the night-time synchronized photographing mode, the pressing lever 75 of the switching plate 74 causes the switching ring 6 to move.
The driven pin 68d of No. 8 is pressed from below. Switching ring 6
8 rotates counterclockwise from the initial position against the bias of the spring 70. The diaphragm switching plate 63 rotates to the large diaphragm position in conjunction with the rotation of the switching ring 68, and the large diaphragm opening 62a is arranged on the photographing optical axis. Further, the stop lever 49 is set to the low speed shutter position as shown in FIG.

In the night sync photographing mode, the switching plate 74
Is rotated together with the operation member 25, and the slide plate 78 is slid further upward than in the daytime synchronized photographing mode. Therefore, the signal member 17 is also moved slightly upward, but the function of displaying the completion of charging is not impaired. Since the bearing plate 77 is held at the same position as in the daytime synchronized photographing mode, the charging switch of the strobe unit 24 is maintained in the ON state.

In the night sync photographing mode, the switching plate 74
The lift piece 80c is pressed by the dimming protrusion 74a. Therefore, the dimming lever 80 rotates counterclockwise in the figure, and the link pin 80b lifts the dimming plate 87. As a result, the dimming member 19 is inserted in front of the strobe light emission 7. Further, the display lever 81 rotates in conjunction with the rotation of the dimming lever 80, and the index plate 20 is inserted in front of the finder 6. As a result, when the photographer looks into the viewfinder 6, it can be seen that the photographer is in the night-time synchronized photographing mode.

When shooting is performed in the night-time synchronized shooting mode,
Although strobe light is emitted, the amount of strobe light is reduced because the light reduction member 19 blocks the strobe light. Further, since the large aperture and the low speed shutter state are set, the amount of ambient light taken in by the subject is increased. As a result, it is possible to photograph a subject and a peripheral image of the subject in a well-balanced manner without causing overexposure even when photographing at night or indoors.

In the above embodiment, the lens-fitted film unit in which the shutter speed is switched according to the photographing mode has been described as an example, but the present invention is also applied to the lens-fitted film unit in which the shutter speed is fixed. be able to.

In the conventional film unit with a lens having a fixed shutter speed, the shutter speed is set by the position of the stopper within the movement locus of the shutter blades. However, if the shutter speed is increased, the timing of opening the exposure aperture and strobe emission will not match. In order to solve this, the stopper may be arranged below the free end of the lower metal contact piece of the synchro switch, similarly to the stop lever of the above embodiment. Thus, even if the shutter speed is set to a high speed, strobe light can be emitted in synchronization with the opening of the exposure opening.

Further, in the above embodiment, the stop lever is rotated by the rotation of the switching ring. However, the stop lever is held in the high speed shutter position or the low speed shutter position by the spring bias, and the spring lever is added when the mode is switched. You may move against the force. It is also possible to adjust the moving position of the stop lever so that shutter speeds of two or more stages can be obtained.

The stop lever may be slid to move between the high speed shutter position and the low speed shutter position. In addition to the lens-fitted film unit, it can also be used in low-cost cameras and the like.

[0064]

As described above, according to the lens-fitted photo film unit of the present invention, even if the shutter speed is high, the stroboscopic light emission can always be performed when the exposure opening is fully opened.

[Brief description of drawings]

FIG. 1 is an external perspective view showing a state of a daylight shooting mode of a lens-fitted film unit using the present invention.

FIG. 2 is an external perspective view showing the state of the daylight synchronized photographing mode of the film unit with lens.

FIG. 3 is an external perspective view showing a state of the film unit with a lens in a night-time synchronized photographing mode.

FIG. 4 is an exploded perspective view showing the configuration of a lens-fitted film unit.

FIG. 5 is an exploded perspective view showing the configurations of a diaphragm and a shutter speed switching mechanism.

FIG. 6 is an explanatory diagram showing a high-speed shutter position of a stopper lever.

FIG. 7 is an explanatory diagram showing a low speed shutter position of a stopper lever.

FIG. 8 is an explanatory diagram showing shutter release in a high-speed shutter state.

FIG. 9 is an explanatory diagram showing shutter release in a low speed shutter state.

FIG. 10 is an explanatory diagram showing a daytime shooting mode of the aperture and shutter speed switching mechanism.

FIG. 11 is an explanatory diagram showing a daytime synchronized shooting mode of the aperture and shutter speed switching mechanism.

FIG. 12 is an explanatory diagram showing a nighttime synchronized shooting mode of the aperture and shutter speed switching mechanism.

FIG. 13 is an exploded perspective view showing the configuration of a shooting mode switching mechanism.

FIG. 14 is an explanatory diagram showing a method of driving an operation member when inspecting a shooting mode switching mechanism.

[Explanation of symbols]

2 Film unit with lens 3 unit body 6 Finder 7 Strobe emission part 8 Shooting mode selection section 15 Operation member 19 Dimmer member 20 Index plate 25 Shooting mode switching mechanism 30 Sync switch 31 Metal contact piece 38 shutter blades 49 Stop lever 62 Large aperture plate 63 Aperture switching plate 65 Lens holding plate 68 Switch ring 74 Switching plate 77 bearing plate 78 Slide plate 79 Back plate 80 Dimmer lever 81 Display lever 87 Dim plate

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G03B 9/70 G03B 9/70 A

Claims (2)

[Claims] 1. A shutter blade that is movable between a closed position that closes the exposure opening and an open position that opens the exposure opening, and a first metal contact piece and a second metal contact piece connected to a strobe circuit. Is provided on the shutter blade and a synchro switch that emits a strobe light when the shutter blade is touched, and presses the first metal contact piece to contact the second metal contact piece while the shutter blade moves from the closed position to the open position. In the lens-fitted photo film unit having a pressing portion, when the shutter blade reaches the open position by abutting or approaching the free end side of the second metal contact piece within or near the movement locus of the pressing portion, A lens-fitted photo film unit, comprising a stopper for receiving a pressing portion via the first metal contact piece and the second metal contact piece. 2. A movable member is movable between a closed position for closing the exposure opening, a fully open position for fully opening the exposure opening, and a moving end position for abutting against a stopper in a state where the exposure opening is fully opened,
A synchro switch that causes the strobe to emit light when the shutter blade that moves from the closed position to the moving end position and returns to the closed position during release, and the first metal contact piece and the second metal contact piece connected to the strobe circuit are in contact with each other. And a film pressing unit provided on the shutter blade, which presses the first metal contact piece to contact the second metal contact piece while the shutter blade moves from the fully open position to the moving end position. At or near the free end side of the second metal contact piece within or near the movement locus of the pressing portion, and the first metal contact piece and the first metal contact piece contact the first metal contact piece while moving from the fully open position to the moving end position of the shutter blade. The stop lever is provided so as to be movable between a high-speed shutter position that receives the pressing portion via the two-metal contact piece and a low-speed shutter position that is separated from the second metal contact piece. A film unit with a gap.