JPH09197506A - Consecutive photographing camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the exposure unevenness of specified consecutive photographing frames from occurring. SOLUTION: By interlocking with a shutter releasing action, the respective slits 42a-45a of shutter disks 42-45 successively cross eight shutter apertures 41a-41h so as to expose eight consecutive photographing frames 19 of a photographing film. The speed regulation driving of governor mechanisms 64 and 65 is intermittently imparted to the disks 42-45 by a geneva mechanism 46 so that an exposure time becomes shorter and an exposure interval becomes longer than the exposure time. The respective frames 19 are not exposed at regular intervals because of the imparting timing of the governer mechanisms 64 and 65 and positional deviation between the respective slits 42a-45a and the respective apertures 41a-45h. Thus, the rotational speed of the disks 42-45 becomes different at a specified position and the exposure values of the respective frames 19 are varied. In order to prevent it, the opening diameters of the apertures 41a-41h corresponding to the overexposure frames 19 are set to be smaller than the other apertures 41a-41h.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous shooting camera which performs time-sequential exposure on each frame obtained by dividing one screen of a photographic film into a plurality of frames by one release operation.

[0002]

2. Description of the Related Art Conventionally, an inexpensive lens-fitted film unit provided with a continuous shooting function is disclosed in Japanese Patent Laid-Open No. 7-11050.
No. 7 proposes this. The shutter device of the lens-fitted photo film unit is provided with four shutter discs whose rotation centers are determined at positions equidistant from adjacent shutter openings in the film feeding direction. Each of these shutter disks is provided with one slit at a position different from the center of rotation. These shutter disks are installed in a state in which each slit is shifted by a phase corresponding to the shooting order.

Gears are formed on the outer periphery of each shutter disk. Then, the traveling plate is linearly moved at a constant speed by the biasing force of the spring, and this movement is converted into a rotational movement by the gears of the rack and the pinion, and this rotational movement is transmitted to the gears on the outer circumferences of the two shutter discs. Then, the two shutter discs are rotated, and the outer gears of the remaining two shutter discs are meshed with the outer gears of the two shutter discs, respectively. The remaining two shutter discs are simultaneously rotated by the shutter disc so that each slit sequentially crosses the shutter opening for continuous shooting.

By the way, in order to stop the motion of a subject playing sports and take a picture, the exposure time when the slit of the shutter disk crosses the shutter opening is 1/125 at the latest.
It is necessary to set it to sec or more. When the shutter disc is rotated to perform multiple exposures, if the rotation speed of the shutter disc is increased, continuous shooting will end in a short time, and it is possible to shoot from the beginning to the end of the motion. However, if the rotation speed of the shutter disk is slowed down, the shutter speed becomes longer at each exposure, which is not suitable for instantaneous shooting and may cause overexposure.
Under such circumstances, the shutter mechanism described above uses a speed switching mechanism that intermittently changes the speed of the shutter disk so that the exposure time is shorter and the exposure interval is longer than the exposure time.

The speed switching mechanism is constructed by connecting a planetary gear mechanism and a governor mechanism. The planetary gear mechanism is equipped with an intermittent gear that meshes with the governor mechanism when the slit of the shutter disk does not cross the shutter opening.When the traveling plate moves from the charge position toward the travel completed position, the intermittent gear is Connect to the governor mechanism. This gives 1
With a single shutter release, time-sequential exposure of continuous shot frames of one screen can be performed at exposure intervals longer than the exposure time.

[0006]

In the above-mentioned shutter mechanism, exposure is performed at regular intervals in each frame due to the timing of disengagement of the governor mechanism and the positional deviation between the slits of each shutter disk and each shutter opening. Absent. Therefore, since the exposure interval and the exposure time are not constant depending on the number of gear teeth on the outer circumference of the shutter disk, the rotation speed of each shutter disk is made different at a specific position. For example, if the rotation speed of the shutter disk becomes faster, underexposure occurs, and conversely, if the rotation speed of the shutter disk becomes slower, the shutter time becomes longer at each exposure, which is not suitable for instantaneous shooting. Since overexposure occurs, there is a drawback that uneven exposure occurs in continuous shooting frames at a specific position. It should be noted that the shutter disk may be adjusted by the number of gear teeth, but if the number of teeth is different, each shutter disk cannot be used in common, so that the time and labor required for parts management during assembly increases, and moreover, There is a risk of incorrect assembly.

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a continuous shooting camera capable of preventing exposure unevenness which occurs in a specific continuous shooting frame.

[0008]

In order to achieve the above object, in the present invention, overexposure is performed so that the exposure value determined by the speed of the slit and the diameter of the shutter opening is the same for each frame. The diameter of the shutter opening corresponding to is smaller than the diameters of the other shutter openings. The size of the slit may be changed instead of changing the diameter of the shutter opening. However, if the size of the slit is changed, it is not possible to use each shutter disk in common. It is not a very good solution because it requires more work and there is a risk of assembly errors.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 to 3, a lens-fitted photo film unit 10 (hereinafter referred to as “film unit”) comprises a front cover 11 and an exposure unit 1.
2, an exposure unit 12 including a main body base 13, a photographic film cartridge 14, and a rear cover 15.
Is incorporated between the front cover 11 and the main body base 13. Further, between the front cover and the exposure unit 12, 2
The lens plates 16 and 17 are sandwiched.

The lens plates 16 and 17 have two upper and lower parts.
A total of four photographing lenses 18 are formed integrally with a transparent resin such as acryl, which is a step, two rows on the left and right. The eight optical axes 18a to 18h of each photographing lens 18 are parallel.

The main body base 13 has a dark box 19 in which the inside is divided into two rooms, upper and lower, four rows, and a total of eight rooms 19a to 19h.
Are integrally formed. Each optical axis 18 of the taking lens 18
a to 18h pass through substantially the center of each partition room 19a to 19h of the dark box 19. A film roll chamber 20 and a cartridge chamber 21 are integrally provided on both sides of the dark box 19. A film roll 2 having a roll form in which a film 22 is drawn into the film chamber 21 and a photo film 23 is drawn from the film film 22 into the film roll chamber 20.
4 are loaded respectively.

In the photographic film cartridge 14 having such a configuration, by covering the main body base portion 13 with the rear cover 15, a film extending portion between the film roll 24 and the cartridge 22 is formed on the back surface of the main body base portion 13. The aperture 36 is positioned. The aperture 36 has a screen size in which the aspect ratio is a high-definition ratio. In one screen shot on the photographic film 23 through the aperture 36 with one shutter release, the time-sequential subject light transmitted through each photographic lens 18 is in each room 19a.
It is composed of eight frames which respectively enter the photographic film 23 through 19 h.

A spool 25, to which the rear end of the photographic film 23 is locked, is rotatably accommodated in the cartridge 22. A winding knob 26 is provided on the upper side of the cartridge chamber 21.
Are rotatably arranged. On the winding knob 26,
An engagement portion 27 that engages with the spool 25 is provided.
A tooth row 28 is formed on the outer circumference of the winding knob 26. A check claw 29 is formed on the main body base 13.
The check claw 29 meshes with the tooth row 28 and prevents the winding knob 23 from rotating in a direction opposite to the winding direction.

The rear cover 15 is integrally provided with a pull-top type lid 30 for covering the bottom surface of the cartridge chamber 21. The lid 30 can be opened to take out the cartridge 22 containing the photographed photo film from the cartridge chamber 21. The rear cover 15 is integrally formed with a finder eyepiece window 31 and an opening 32 for exposing a part of the winding knob 23 to the outside.

The front cover 11 has a shutter button 33,
A viewfinder objective window 34 and an opening 35 for exposing the taking lens 18 to the outside are integrally formed. Opening 35
Is composed of eight openings 35a to 35h that expose each of the taking lenses 18 to the outside. The shutter button 33 is elastically formed by cutting out a part of the upper surface of the front cover 11, and is pressed down when the shutter is released. When the pressing operation is released, the shutter button 3
3 returns to its original position by its own elasticity.

The exposure unit 1 is provided on the front surface of the main body base 13.
2 is detachably attached with screws or the like. A finder optical system 39 including an eyepiece lens and an objective lens is incorporated in the exposure unit 12.

The exposure unit 12 includes a light-tight box, a shutter mechanism, a shutter charge mechanism, a film winding stop mechanism,
And a film counter mechanism and the like are integrated into one unit. The box consists of a front plate 40, a middle plate 41,
And a rear plate 42. The shutter mechanism is shown in FIG.
As shown in FIG. 5, the shutter disks 42 to 45 incorporated between the front plate 40 and the middle plate 41, the external Geneva mechanism 46 which is an intermittent connection means, and the governor mechanism 4 which is a speed reduction means.
7, a traveling plate 48 which is a driving member incorporated between the middle plate 41 and the rear plate 42, a switching shield plate 49, a total shield plate 50, and the like.

The front plate 40, the middle plate 41, and the rear plate 42 are
Openings 40a to 40h, 41a to 41h, and 42a to 42h are formed on the optical axes 18a to 18h of the taking lens 18, respectively. Of these, the openings 41a to 41h of the intermediate plate 41
Is the aperture opening. These aperture openings 41a-4
1h doubles as a fixed aperture and a shutter opening. Of these diaphragm openings 41a to 41h, the diameters of the diaphragm openings 41a to 41h corresponding to the frames that tend to be overexposed are smaller than the diameters of the other diaphragm openings 41a to 41h. The openings 40a to 40h and 42a to 42h are sized to cut harmful light outside the angle of view.

Four shutter discs 42 to 45 are rotatably provided on the front surfaces of the aperture openings 41a to 41h. The centers of rotation of these shutter disks 42 to 45 are located above a horizontal line passing through the centers of the four aperture openings 41e to 41h arranged above, and adjacent aperture openings 41e, 41f, 41g and 41h. 2 at an equal distance from
The center of rotation of the shutter discs 44, 45 is located below a horizontal line passing through the centers of the four aperture openings 41a to 41d arranged below and adjacent to the aperture openings 41.
The centers of rotation of the two shutter discs 42 and 43 are set at positions equidistant from a and 41b and 41c and 41d, respectively.

Each of the shutter disks 42 to 45 is provided with one slit 42a, 43a, 44a, 45a. These slits 42a, 43a, 44a,
45a is formed on the same radius from each rotation center, and its slit length (length in the radial direction of the shutter disc)
Is equal to or larger than the inner diameters of the aperture openings 41a to 41h.

Gears 42b, 43b, 44b, 4 having the same number of teeth are provided on the outer circumferences of the shutter disks 42-45 over the entire circumference.
5b is formed, and the gears 42b and 44b, and the gear 43 between the shutter discs having the same center of rotation in the vertical direction are formed.
b and the gear 45b are in mesh with each other. The gear 52 meshes with the gear 44b and the gear 45b. The gear 52 is a two-stage gear, and a gear 54 meshes with the other gear 53. The gear 54 is a two-stage gear, and the other gear 55 has a rack 48 for transmitting the traveling drive of the traveling plate 48 via the opening 56 of the intermediate plate 41.
a is in mesh.

Each of the shutter disks 42 to 45 has a traveling plate 48.
Each of which makes two revolutions by traveling along the film feeding direction. These slits 42a, 43a, 4
4a and 45a traverse each aperture opening 41a to 41h twice by two rotations of the shutter disks 42 to 45. This cross section is formed by slits 42a, 43a of the shutter disks 42, 43.
Crosses the lower aperture opening rows 41a to 41d, and the slits 44a and 45a of the shutter disks 44 and 45 cross the upper aperture opening rows 41e to 41h, respectively.

Below the traveling plate 48, the upper aperture opening rows 41e to 41h and the lower aperture opening rows 41a to 41d are selectively used for the first rotation and the second rotation of the shutter disks 42 to 45. A switching shield plate 49 that shields the diaphragm apertures 41 a to 4 a
It is arranged behind 1h so as to be movable in the film feeding direction. The switching shield plate 49 has a lower aperture opening row 41a.
To 41d at the same time to expose four openings 49a to 49h
And four openings 49e to 49h for simultaneously exposing the upper diaphragm opening rows 41e to 41h are formed at predetermined intervals in the film feeding direction, and the openings 56d to 49h are formed by the spring 56 in the lower diaphragm opening row. It is urged toward the switching position where 41d to 41h are exposed at the same time.

A projecting piece 57 and a step portion 58 are integrally formed on the switching shield plate 49, respectively.
Is moved toward the charging position, the falling piece 48b of the traveling plate 48 hooks the protruding piece 57 to open the opening 4
9a to 49d are moved toward the initial position where the lower aperture rows 41a to 41d are exposed at the same time. When the switching shield plate 49 is moved to the initial position, the switching shield plate 49 is held by the one end 59a of the switching lever 59 which enters the step portion 58. One end 59 a of the switching lever 59 is biased by a torsion spring 60 in a direction of entering the step portion 58.

After the shutter release, when the traveling plate 48 travels to a position where the shutter discs 42 to 45 rotate once,
The falling piece 48b of the traveling plate 48 contacts the other end 59b of the switching lever 59, and rotates the switching lever 59 in the direction opposite to the biasing direction of the spring 60. As a result, the holding of the switching shield plate 49 is released, and the switching shield plate 49 instantly moves toward the switching position by the bias of the spring 56. When the switching shield plate 49 moves to the switching position, one end 59a of the switching lever 59 contacts the protruding piece 57, and the switching shield plate 49 is held at the switching position.

A gear 60 meshes with the shutter disk 45. The gear 60 is a two-stage gear, and the Geneva mechanism 46 is meshed with the other gear 61. A governor mechanism 47 meshes with the Geneva mechanism 46. The Geneva mechanism 46, which is an intermittent connection means, has two pins 62a and 62b.
And a Maltese cross 63 having four grooves 63a to 63d. The pin gear 62 rotates twice with respect to the shutter discs 42 to 45, and the pins 62a and 62b and the grooves 63a to 6 are provided while the slits 42a to 45a pass through the aperture openings 41a to 41h.
3d is disengaged and the pins 62a, 62b are in the grooves 63a-6 while the apertures 41a-41h are not passing.
It meshes with 3d.

While the Maltese cloth 63 is stopped, the shutter discs 42 to 45 are driven by the traveling plate 48 to rotate at high speed. When the Malta cross 63 rotates, the governor mechanism 47 decelerates the rotation of the shutter disks 42 to 45.
As a result, the exposure intervals of the shutter discs 42 to 45 become slower than the exposure time.

The governor mechanism 47 includes shutter disks 42-4.
5 is a deceleration means for slowing the rotation of the vehicle 5, and is composed of a well-known escape wheel 64 and pallet fork 65. The pallet fork 65 constitutes a switching means together with the lever plate 65a and is pivotally attached to the lever plate 65a. Lever plate 6
5a is movably attached between a meshing position where the pallet fork 65 is meshed with the escape wheel 64 and a retracted position retracted from the shaft 65b which is planted in the middle plate 41. The lever plate 65a has a long hole 41 in the middle plate 41.
A projecting portion 65c is provided which projects to the back surface of the middle plate 41 through i.

The exposure time of each of the shutter disks 42 to 45 is
The traveling speed of the traveling plate 48 and the slits 42a to 45a and the aperture opening 41 at the time when the delay of the governor mechanism 47 is released.
It depends on the angle between a and 41h, and it is necessary to keep these constant in order to prevent exposure unevenness. In this embodiment, since the apertures 41a to 41h have different angles with respect to the rotation centers of the shutter disks 42 to 45, the pin gears are used to keep the above-mentioned angles constant. The distance between the two pins 62a and 62b of 62 is set to the same ratio as the two types of angles. As a result, the delay drive of the governor mechanism 47 is reliably transmitted within the exposure interval of the shutter disks 42 to 47, and the slits 42a to 45a and the aperture opening 41a to which the delay drive of the governor mechanism 47 is released are released. The angles with 41h are all the same.

The traveling plate 48 is incorporated movably between the charge position and the traveling completion position along the film feeding direction. On the rear surface of the traveling plate 48, a pin 48c protruding toward the rear surface of the rear plate 42 through the long hole 66 of the rear plate 42.
Are provided integrally. One end 67a of a torsion spring 67 is hooked on this pin 48c. In the torsion spring 67, the coil portion is fixed to four projecting pins 68 formed integrally with the rear plate 42, and the other end 67b is provided at the rear plate 42.
It is hooked on the stopper pin 69 formed on
The traveling plate 48 is urged toward the traveling completion position.

The shutter charging mechanism, the film winding stopping mechanism, etc. are composed of a sprocket 70, a three-stage gear 71, a traveling plate 48, a connecting plate 72, a release interlocking lever 73, a winding stopping lever 74, a rotating member 75 and the like. ing. Specifically, as shown in FIG. 7, the sprocket 70 is
It engages with the perforations of the photographic film 22 above the dark box 19 and makes one rotation in conjunction with the film transfer for one screen. This sprocket 70 has a gear 76 coaxially attached thereto.
Are fixed integrally.

The gear 76 meshes with the middle gear 77 of the three-stage gear 71 and makes one rotation in the same manner as the sprocket 70 in conjunction with the film transfer for one screen. A tooth-missing gear 78 is integrally formed above the three-stage gear 71. The tooth-chipped gear 78 faces the rack 48 d of the traveling plate 48 through the opening 87 of the rear plate 42. When the winding operation of the winding knob 26 is performed, the sprocket 70 and the three-stage gear 71 are rotated in association with the transfer of the photo film 23, and the gear portion 78b of the tooth-missing gear 78 meshes with the rack 48c, whereby the traveling plate 48 is moved from the traveling completion position to the charging position.

The connecting plate 72 includes a traveling plate 48 which travels inside the box and a release interlocking lever 7 which is arranged outside the box.
3 and the connection with the winding stop lever 74 are performed in a light-tight state, and can be lifted and lowered between the lowered position and the raised position in the separate chamber 79 formed in the intermediate plate 41. Built into.

The connecting plate 72 has elastic claw pieces 72a,
The opening 72b and the lock claw 72c are integrally formed. The elastic claw piece 72a faces the traveling path of the traveling plate 48 traveling inside the box through the opening 80 formed in the separate chamber 79, and the fixed claw 8 formed inside the intermediate plate 41.
1 to hold the connecting plate 72 in the lowered position. When the traveling plate 48 moves to the charge position, the protrusion 48f formed on the traveling plate 48 bends the claw piece 72a, and the claw piece 72a.
The engagement between a and the fixed claw 81 is released.

The interlocking rod 73a of the release interlocking lever 73 is inserted into the opening 72b of the connecting plate 72. The release interlocking lever 73 rotates between an initial position and a pressing position about a rotation axis along the optical axes 18a to 18h in conjunction with a pressing operation of the shutter button 33, and is set to an initial position by a torsion spring 82. Is being urged towards. This torsion spring 8
2 urges the connecting plate 72 toward the raised position via the interlocking rod 73a. Thereby, the claw piece 72 of the connecting plate 72
After the engagement between a and the fixed claw 81 is released, the connection plate 72 is moved to the raised position and the release interlocking lever 73 is moved to the initial position by the biasing force of the torsion spring 82. When the connecting plate 72 moves to the raised position, the locking claw 72
c engages with the holding claw 48e of the traveling plate 48 to hold the traveling plate 48 at the charge position.

The rotary member 75 has a groove 7 on the outer periphery of the disk 75a.
5b is formed and rotates integrally with the sprocket 70. One end 74a of the winding stop lever 74 faces the outer periphery of the disc 75a. The winding stop lever 74 has one end 7
In addition to 4a, an inclined surface portion 74b and a winding stop claw 74c are integrally formed, and a rotation axis along a direction orthogonal to the optical axes 18a to 18h is provided with a winding stop position and a winding stop release position. It is rotatably arranged between them and is biased toward the winding stop position by a torsion spring 83. Slope 74b
The front end of the interlocking rod 73a inserted through the opening 72b faces.

When the photographic film 23 is wound up for the length of one screen, the rotating member 75 rotates once. When the rotating member 75 makes one rotation, the one end 74a enters the groove 75b and the sprocket 70 is prevented from rotating. At this time, the winding stop lever 74 rotates toward the winding stop position, so that the winding stop claw 74c moves the tooth row 2 of the winding knob 26.
8 is engaged, and the winding operation of the winding knob 26 is prohibited.

When the shutter button 33 is depressed, the release interlocking lever 73 rotates to the depressed position. When the release interlocking lever 73 rotates to the depressed position, the interlocking rod 73a that follows the release interlocking lever 73 moves the connecting plate 72 to the lowered position. When the connecting plate 72 moves to the lowered position, the lock claw 7
2c is disengaged from the holding claw 48e of the traveling plate 48,
The holding of the traveling plate 48 at the charge position is released. At this time, the traveling plate 48 travels toward the charging position without meshing with the gear portion 78b because the toothless portion 78a of the toothless gear 78 faces the rack 48d.

On the other hand, when the release interlocking lever 73 is rotated to the depressed position, the tip of the interlocking rod 73a abuts on the inclined surface portion 74b of the unwinding lever 74 to rotate the unwinding lever 74 toward the unwinding release position. Let When the winding stop lever 74 rotates to the winding stop release position, the one end 74a retracts from the groove 75b, and the winding stop claw 74c retracts from the tooth row 28. Therefore, the rotation of the sprocket 70 and the rotation operation of the winding knob 26 are locked. Is released. When the connecting plate 72 moves to the lowered position, the claw piece 72a engages with the fixed claw 81, so that the release interlocking lever 73 is held in the depressed position. As a result, the tip end of the interlocking rod 73a remains in the state of pressing the inclined surface portion 74b of the winding stop lever 74, so that the winding stop lever 74 does not rotate to the winding stop position.

When the traveling plate 48 moves from the traveling completion position to the charging position during the winding operation, the shutter discs 42 to 45 rotate in reverse due to the engagement of the rack 48d and the tooth-missing gear 78, and exposure is performed. Will end up. Therefore, in order to prevent the exposure that occurs during the film winding operation, the total shielding plate 50 is arranged.

All the shielding plates 50 have eight openings 50a-5.
0h is formed, and it is arranged behind the switching shield plate 49 so as to be movable in the film feeding direction. The full shield plate 50 is provided with apertures 41a from the apertures 50a to 50h.
To 41h, all exposed positions and respective openings 50a to 5h
0h is moved between all of the aperture openings 41a to 41h and all the shield positions where the aperture openings 41a to 41h are shielded, and is biased by the spring 84 toward the all-exposed position.

Further, the entire shield plate 50 is integrally provided with an engaging portion 50i having an inclined surface in a direction of moving toward the total exposed position. The engaging portion 50i pushes up the above-mentioned protruding portion 65c of the lever plate 65a to move the lever plate 65a to the meshing position when all the shielding plates 50 have moved to the all exposed position, and the all shielding plates 50 have all the shielded positions. When the lever plate 65a is moved toward, the lever plate 65a is released from the protrusion 65c to release the pushing up of the lever plate 65a. When the engaging portion 50i retracts, the lever plate 65a
Moves to the retracted position due to its own weight.

Below the three-stage gear 71, a toothless gear 85
Are integrally formed. A cutout portion 85 a is formed in the tooth-chipped gear 85. An L-shaped piece 86 formed so as to project from the entire shield plate 50 faces the cutout portion 85 a through the opening 87 of the rear plate 42.

When the tooth-chipped gear 85 rotates following the rotation of the sprocket 70, the notch 85a hooks the L-shaped piece 86 at the edge before the traveling plate 48 starts to move to the charge position. The shield plate 50 is moved to all shield positions. After that, until the movement of the traveling plate 48 to the charge position is completed, the L-shaped piece 86 is attached to the tooth-chipped gear 8 at this position.
By sequentially engaging the teeth of No. 5, the whole shield plate 50 is held in the state of all shield positions. Then, when the movement of the traveling plate 48 to the charge position is completed, the cutout portion 85a is formed.
Faces the L-shaped piece 86, so that all the shielding plates 50 have springs 84.
It is returned to the fully exposed position by the urging of.

The film counter mechanism is composed of a one-tooth gear 75c formed at the tip of the rotating member 75, a number display plate 88, and a cam portion 88a, and these are a top plate 89.
Is attached to the box by. The one-tooth gear 75c is
When the photographic film 23 is meshed with the tooth row 88b formed on the outer periphery of the number display plate 88 and the picture film 23 is wound up by the length of one screen, the number display plate 8 is rotated by one rotation of the one tooth gear 75c.
8 advances by one scale. A number is displayed on the upper surface of the number display plate 88 to display the remaining number of shots at that time through a display window 90 formed by combining the front cover 11 and the rear cover 15.

When the number display plate 88 advances by the winding operation after taking a picture on the last screen, the number display plate 8
The cam portion 88a integrally formed on the lower surface of 8 enters the upper surface of the rising protrusion 73b integrally formed on the release interlocking lever 73. After that, when the traveling plate 48 reaches the charging position, the connecting plate 72 moves toward the rising position, and in conjunction with this, the release interlocking lever 73 also rotates toward the initial position. Standing protrusion 73b during this rotation
Comes into contact with the cam portion 88a, and holds the release interlocking lever 73 at the film storage allowable position between the depressed position and the initial position. When the release interlocking lever 73 reaches the film storage allowable position, the connecting plate 72 holds the traveling plate 48 in the charge position, and the interlocking rod 73a holds the winding stop lever 74 in the winding stop release position. As a result, by the winding operation after the last screen is photographed, all the photographed photo films 23 can be stored inside the cartridge 22 while the traveling plate 48 is held at the charge position.

The operation of the above configuration will be described. After the shutter release is completed, as shown in FIG. 8, the slits 42a to 45a of the shutter disks 42 to 45 are located on the horizontal line passing through the rotation center.
The shutter disc 4 has slits 42a and 45b of 2,44.
It is in a position displaced by 180 degrees with respect to 3,45. Therefore, the aperture openings 41a to 41h are shielded by the shutter disks 42 to 45.

The Geneva mechanism 46 includes the pin 6 of the pin gear 62.
It is in a state immediately before the engagement between the groove 2a and the groove 63a of the Malta cross 63 is released. The traveling plate 48 is in the traveling completed position. The film winding stop mechanism has the release interlocking lever 73 in the depressed position and the connecting plate 72.
Is in the lowered position, and further, the winding stop lever 74 is in the winding stop release position.

The switching shield plate 49 is in an initial position in which the tip 59a of the switching lever 59 is in contact with the step portion 58 and the lower diaphragm aperture rows 41a to 41d are all exposed. The entire shield plate 50 is in the fully exposed position, and the engaging portion 50i contacts the protruding portion 65c to hold the lever plate 65 at a position where the pallet fork 65 meshes with the escape wheel 64.

When the winding operation for rotating the winding knob 26 in the film winding direction is performed, the photographic film 23
Is transferred from the film roll chamber 20 toward the cartridge chamber 21, and the sprocket 70 rotates in conjunction with this transfer. Three-step gear 71 interlocked with the rotation of sprocket 70
When the gear rotates, as shown in FIG.
The notch 85a of 5 hooks the L-shaped piece 86 at the edge to move the entire shield plate 50 to the entire shield position. This all-shield 5
The movement of 0 moves the engaging portion 50i to the position retracted from the protruding portion 65b. As a result, the lever plate 65a rotates to the retracted position by its own weight around the shaft 65b. After that, the gear portion 78b of the tooth-missing gear 78 meshes with the rack 48d to move the traveling plate 48 toward the charging position.

When the traveling plate 48 moves toward the charge position, the shutter discs 42 to 45 rotate, but during this period, the exposure is performed because the entire shielding plate 50 shields all the aperture openings 41a to 41h. Never. Further, the rotations of the shutter disks 42 to 45 at this time are transmitted to the escape wheel 64, but the lever plate 65a is moved to the retracted position, so the transmission of the slow-down drive of the governor mechanism 47 is interrupted. .

When the traveling plate 48 moves to the charge position, since the reciprocating length of the traveling plate 48 is the same, the shutter disks 42 to 45 make two revolutions in the opposite directions and the same state as the initial state described above. Becomes

When the traveling plate 48 reaches the charging position,
The protrusion 48f bends the claw piece 72a of the connecting plate 72, and the engagement between the claw piece 72a and the fixed claw 81a is released. As a result, the action of the torsion spring 82 causes the release interlocking lever 7 to operate.
3 moves to the initial position, and the connecting plate 72 moves to the raised position. Then, when the connecting plate 72 moves to the raised position, the lock claw 72c engages with the holding claw 48e of the traveling plate 48 and holds the traveling plate 48 at the charge position. Running board 48
After the gear reaches the charging position, the tooth-chipped portion 78a of the tooth-chipped gear 78 faces the rack 48d.
Eight cannot move any further. At this time, the torsion spring 67 is twisted in the direction in which the spring is wound.

When the release interlocking lever 73 is rotated to the initial position, the pressing of the interlocking rod 73a against the inclined surface portion 74d is released, so that the winding stop lever 74 is twisted by the torsion spring 83.
It is rotated toward the winding stop position by the urging force of. At this time, since the sprocket 70 has not yet made one rotation, the one end 74a of the winding stop lever 74 is in contact with the peripheral surface of the disc 75a.

When the photographic film 23 is wound up by the length of one screen, the sprocket 70 rotates once and the end 7
4a enters the groove 75b. As a result, the winding stop lever 74 rotates to the winding stop position, and rotation of the sprocket is blocked. At this time, the winding stop claw 74c engages with the tooth row 28 of the winding knob 26, and the rotation operation of the winding knob 26 is also blocked. When the sprocket 70 makes one revolution, the three-stage gear 71 makes one revolution. Therefore, since the cutout portion 85 a faces the L-shaped piece 86, the entire shield plate 50 is returned to the fully exposed position by the bias of the spring 84. Due to the movement of all the shielding plates 50, the engaging portion 50i moves into the protruding portion 6
5c underneath and push it up, lever plate 65a
Move to the meshing position. As a result, the state shown in FIG. 8 is restored, and the pallet fork 65 meshes with the escape wheel 64.

When the shutter button 33 is depressed, the release interlocking lever 73 rotates to the depressed position and the interlocking rod 73
The connecting plate 72 also moves to the lowered position via a. As a result, the lock claw 72c of the connecting plate 72 retracts from the holding claw 48e of the traveling plate 48, and the retaining of the traveling plate 48 at the charge position is released. At this time, the torsion spring 67 biases the spring in the direction to rewind the spring, so that the traveling plate 48 moves toward the traveling completion position.

The linear drive of the traveling plate 48 is converted into rotational drive by the gear 55 meshed with the traveling drive rack 48a and transmitted to the shutter discs 42 to 45. The rotation directions of the shutter disks 42 to 45 are the directions shown by the arrows in FIG. Since the Geneva mechanism 46 is in the state immediately before the engagement between the pin 62b of the pin gear 62 and the groove 63a of the Maltese cross 63 is released, the next pin 62a
Until the groove 63b and the groove 63b are engaged, the shutter disc 4
2 to 45 are rotated by the biasing force of the torsion spring 67 that biases the traveling plate 48. By this rotation, as shown in FIG. 11, each of the slits 42a to 45a is rotated from the position shown by the dotted line to the position shown by the solid line.

During this rotation, the slit 44 between the upper left shutter disc 44 and the lower left shutter disc 42 is formed.
a and 42a cross the aperture openings 41a and 41e, respectively, but the switching shield plate 49 has a lower aperture opening row 41a.
Since only ~ 41d is exposed, the subject light passes only through the diaphragm opening 41a which the slit 42a crosses. This subject light enters the photographic film 23 through the partition room 19a of the dark box 19, and a frame of a latent image is formed in the size of the partition room 19a.

After that, when the shutter disks 42 to 45 rotate to the positions where the slits 42a to 45a are shown by the solid lines,
Pin 62a of pin gear 62 is groove 63 of Maltese cross 63.
mesh with b. Therefore, the governor mechanism 47 is decelerated thereafter, so that the rotation of the shutter disks 42 to 45 is decelerated.

The deceleration drive of the governor mechanism 47 is given to the shutter disks 42 to 45 while the Malta cross 63 is rotating. The rotation of the shutter discs 43 to 45 during this period is
Each of the slits 42a to 45a is between the position shown by the dotted line in FIG. 12 and the position shown by the solid line. At the position indicated by the dotted line in the figure, the engagement between the pin 62a and the groove 63b is released, and the rotation of the Malta cross 63 is stopped. As a result, the Geneva mechanism 46 is brought into a stopped state in which the deceleration drive of the governor mechanism 47 is released. At this time, the angle between the slit 42a and the diaphragm aperture 41b that crosses next is the same as in the initial state, so that the next second exposure can be performed in the same exposure time as the first exposure.

Until the Geneva mechanism 46 operates next time, the traveling plate 48 travels again by the urging force of the torsion spring 67, and the slits 42a to 45a are shown by solid lines from the positions shown by dotted lines in FIG. Shutter disc 42 to the position shown
~ 45 rotates. During this rotation, the frame corresponding to the diaphragm opening 41b which the slit 42a crosses is exposed for the second time. After that, the slits 42a to 45a are shown in FIG.
In the range of rotation from the position indicated by the dotted line to the position indicated by the solid line, the deceleration drive of the governor mechanism 47 is applied to the shutter disks 42 to 45. At this point, the shutter disks 42-45
Has rotated half a turn, and thereafter, the shutter disks 42 to 45 further rotate half a turn in the order shown in FIGS. During this time, the slit 43a crosses the aperture opening 41c during the third exposure in FIG. 15, and the slit 4a in FIG.
3a crosses the aperture opening 41d, and the fourth exposure is performed. Then, in the state shown in FIG.
5 is in a state of rotating once.

When the traveling plate 48 travels to the position where the shutter discs 42 to 45 are rotated once, as shown in FIG.
The falling piece 48b contacts the other end 59b of the switching lever 59, and rotates the switching lever 59 clockwise against the bias of the spring 60. As a result, the engagement between the one end 59a of the switching lever 59 and the step portion 58 of the switching shield plate 49 is released, and the biasing of the spring 56 causes the switching shield plate 49 to instantaneously move toward the switching position. At this time, one end 59a of the switching lever 59 is engaged with the protruding piece 57 of the switching shield plate 49 to hold the switching shield plate 49 at the switching position.

When the switching shield plate 49 moves to the switching position, the upper diaphragm aperture rows 41e to 41h are exposed. Thereafter, the shutter disks 42 to 45 rotate once again in the same manner as described with reference to FIGS. 11 to 18, and when the slit 44a crosses the aperture opening 41e as shown in FIG. 11, the fifth exposure is performed. When the slit 44a is shown in FIG.
f the sixth exposure, the slit 45a crosses the aperture opening 41g when shown in FIG. 15, the seventh exposure, and the slit 45a crosses the aperture opening 41h when shown in FIG. The final eighth exposure is performed in sequence. Thereafter, the traveling plate 48 reaches the traveling completion position and stops, and the shutter discs 42 to 45 enter the state shown in FIG. As a result, the photographic film 23 set in the exposure frame 19 is exposed with all the time-series latent image images in 8 frames obtained by dividing one screen into two rows vertically and four columns horizontally.

At the time when the exposure is completed, since the connecting plate 72 is held in the lowered position, the winding stop lever 74
Is held at the unwinding release position against the bias of the torsion spring 83. This enables the next film winding operation.

Thereafter, the shutter release is repeatedly performed after the winding operation is performed in the same manner as described above, so that each screen of the photographic film 23 is exposed with a time-sequential latent image of eight frames. Then, when the traveling plate 48 is returned to the charge position by the winding operation after photographing the last screen, the cam portion 88a of the number display plate 88 abuts on the rising protrusion 73b of the release interlocking lever 73, and the release interlocking lever. Hold 73 at the film storage allowable position. As a result, the winding stop lever 74 can be held in the winding stop release position while the traveling plate 48 is held in the charge position. Therefore, the entire photo film 23 can be stored inside the cartridge 22 by the last winding operation. You can

The photographed film unit 10 is submitted to the photo lab as it is. At the developing station, the bottom cover 30 of the rear cover 15 is opened, the cartridge 22 is taken out, and the photographic film 23 is subjected to development and baking processing in the conventional manner, and a print photograph 90 as shown in FIG. 20 is obtained. The print photograph 90 has a size in which the aspect ratio is a high-definition ratio, and images of each frame are recorded in time series from upper left to upper right and from lower left to lower right.

[0067]

EXAMPLE The exposure values given to the eight frames corresponding to the rooms 19a to 19h are the slits 42a, 43a, 4 respectively.
It is determined by the speed of 4a and 45a and the F number. As design values, the diaphragm openings 41a to 41h are set to φ1.67 mm and the F number is set to 9.4. FIG. 21 is a graph showing the amount of deviation from the reference exposure value obtained by measuring the exposure value given to each frame. According to this, it has been found that there is a regular difference in exposure value for each frame, and overexposure with respect to the reference exposure value occurs in a predetermined frame. Therefore, in order to eliminate such a difference in the exposure value, in the present embodiment, the aperture openings 41a to 41 corresponding to the frames measured by overexposure.
It was formed small so as to narrow the diameter of h.

For example, as shown in FIG. 21, when the average exposure value deviation (black square) for each frame exceeds the range of 0.1 EV with respect to the reference exposure value, it corresponds to the room 19b. The frame number is 2, the frame number 3 corresponds to the room 19c, the frame number 5 corresponds to the room 19e, and the frame number 7 corresponds to the room 19g. Therefore, the aperture diameter of the aperture opening 41b corresponding to the frame number 2 is φ1.628 mm, and the aperture diameter of the aperture opening 41c corresponding to the frame number 3 is φ1.592.
mm, the aperture diameter of the aperture opening 41e corresponding to the frame number 5 is φ1.581 mm, and the aperture aperture 41 corresponding to the frame number 7
The opening diameter of g was φ1.619 mm.

The factors that cause overexposure in frame numbers 2 and 3 are that the shutter discs 42 and 43 for exposing these frames are located at the end positions from the drive source, and the shutter disc 44 is also present. , 45 because the rotation directions are different. The cause of overexposure that occurs in frame number 5 is the frame that is exposed after the traveling plate 48 contacts the switching lever 59 and switches the switching shield plate 49.
It is presumed that this is because the traveling speed of 1 has changed and the rotation speed of the shutter disk 44 has been reduced.

Although the shutter mechanism for continuous shooting of the lens-fitted film unit 10 has been described in the above embodiment, the present invention is not limited to this, and can be applied to a general camera provided with a continuous shooting function. It goes without saying that you can do it. Further, although the traveling plate is used as the drive source, the present invention is not limited to this, and it is also possible to adopt a type in which a plurality of shutter disks are rotated by using the drive of a motor or the like. Further, the row of shutter openings is not limited to four rows, and the arrangement is not limited to two rows of upper and lower shutter openings, but may be one row or three or more rows. Also, as a film to be loaded in advance, 135
In addition to the photographic film with a cartridge of the type, for example, a type in which the photographic film is fed by rotating a spool may be loaded.

[0071]

As described above, according to the present invention, since the diameter of the shutter opening corresponding to the overexposed frame is made smaller than the diameters of the other shutter openings, the exposure unevenness caused in a specific continuous shooting frame is caused. Can be reliably prevented.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a film unit with a lens.

FIG. 2 is a cross-sectional view of a film unit with a lens.

FIG. 3 is a vertical cross-sectional view of a lens-fitted film unit.

FIG. 4 is an exploded perspective view showing a part of a shutter mechanism.

FIG. 5 is an exploded perspective view showing another portion of the shutter mechanism.

FIG. 6 is an exploded perspective view showing essential parts such as a shutter charge mechanism, a film winding stop mechanism, and a film counter mechanism.

FIG. 7 is a schematic explanatory diagram of a film winding stop mechanism, a shutter charge mechanism, and the like.

FIG. 8 is an explanatory diagram showing an initial state of a shutter disc, all shield plates, and a switching unit.

FIG. 9 is an explanatory view showing the states of the shutter disc, the entire shielding plate, and the switching means during the film winding operation.

FIG. 10 is an explanatory diagram showing a state immediately after the shutter release of the shutter disc, the Geneva mechanism, and the like.

FIG. 11 is an explanatory diagram showing a state in which the shutter disk is rotated and the first or fifth exposure is performed while the Geneva mechanism is stopped.

FIG. 12 is an explanatory diagram showing a state in which the shutter disk rotates while the Geneva mechanism operates after the exposure described in FIG. 11;

FIG. 13 is an explanatory diagram showing a state in which the shutter disk is rotated and the second or sixth exposure is performed while the Geneva mechanism is stopped.

FIG. 14 is an explanatory diagram showing a state in which the shutter disk rotates while the Geneva mechanism operates after the exposure explained in FIG. 13;

FIG. 15 is an explanatory diagram showing a state in which the shutter disk is rotated and the third or seventh exposure is performed while the Geneva mechanism is stopped.

FIG. 16 is an explanatory diagram showing a state in which the shutter disk rotates while the Geneva mechanism operates after the exposure described in FIG. 15;

FIG. 17 is an explanatory diagram showing a state where the shutter disk rotates and the fourth or eighth exposure is performed while the Geneva mechanism is stopped.

FIG. 18 is an explanatory diagram showing a state in which the shutter disk rotates while the Geneva mechanism operates after the exposure explained in FIG. 16;

FIG. 19 is an explanatory diagram showing a state in which the switching shield plate is switched after the shutter disk has rotated once.

FIG. 20 is a front view showing the obtained print photograph.

FIG. 21 is a graph in which the exposure value at each frame is measured.

[Explanation of symbols]

 18 Photographing lens 41a-41h Aperture aperture 42-45 Shutter disc 42a, 43a, 44a, 45a Slit 46 Geneva mechanism 47 Governor mechanism 48 Traveling plate 49 Switching shielding plate 50 All shielding plate 50i Engagement plate 64 Lock wheel 65 Ankle 65a Lever plate 70 sprockets

Claims (1)

[Claims] 1. A drive means is driven in response to one shutter release, the shutter disk is rotated by this drive, and a slit provided in the shutter disk sequentially traverses a plurality of shutter openings to form a photographic film. In a continuous shooting camera that performs time-sequential exposure on each frame obtained by dividing one screen into a plurality of frames, the overexposure is performed so that the exposure value determined by the speed of the slit and the diameter of the shutter opening is the same for each frame. The continuous shooting camera is characterized in that the diameter of the shutter opening corresponding to each frame is smaller than the diameters of other shutter openings.