JP3322757B2 - Shutter for continuous shooting - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a shutter disk having a slit formed by a single shutter release is rotated at a constant speed and sequentially passed through the slit so as to cross a plurality of shutter openings. The present invention relates to a continuous shooting shutter device that performs a plurality of exposures on an exposure screen with a certain deviation.

[0002]

2. Description of the Related Art A continuous photographing camera sequentially captures a moving subject with a time lag so as to obtain a photographic image in which the motion stops at each photographing moment. When taking a picture, the form at each moment can be observed as a still image, which is very convenient.

As a continuous shooting camera, Japanese Patent Laid-Open No. 2-1051
Japanese Patent Publication No. 32 has proposed a shutter having a total of four shutter apertures in two upper and lower stages and two columns on the left and right in order to make it easy to understand the temporal order of the continuous shooting screen. In the shutter device of this camera, photographing lenses are respectively disposed in front of the shutter openings, and one shutter disk having its rotation center determined at a position equidistant from each shutter opening is provided behind the shutter opening. It is provided on the side. The shutter disk is provided with one slit on the circumference. Then, the shutter disk is rotated by driving a motor, and the slits sequentially cross the shutter opening to perform four-shot shooting.

[0004] By the way, golf swings are generally
The process from top to follow is completed in about 0.5 to 1 second. When the shutter disk is rotated so that the continuous shooting speed from the first exposure to the completion of the last exposure is completed in about 0.5 to 1 second, the slit of the shutter disk is Each exposure time (shutter speed) across the opening becomes longer. In order to stop the movement of the subject in sports and shoot, it is necessary to set each exposure time to 1/12 at the latest.
Since it is necessary to set the time to 5 seconds or more, preferably 1/250 second, this may not only make the instantaneous shooting unsuitable but also result in overexposure.

Therefore, the above-described shutter device is provided with control means for controlling the motor so that the motor is rotated at a high speed only at the time of each exposure and an exposure interval (interval) longer than each exposure time is obtained. Therefore, a stepping motor that can control the rotation angle with high precision is used as the motor because of the necessity of accurately changing the rotation speed of the shutter disk. However, when this stepping motor is used, there is a problem in that the manufacturing cost of the shutter device is increased due to the high cost.

[0006] Without using a stepping motor,
Japanese Patent Laid-Open No. 5-30 discloses a continuous shooting shutter device capable of accurately changing the rotation speed of a shutter disk so that an exposure interval longer than each exposure time can be obtained.
3131 and JP-A-5-307208, respectively. In the shutter devices described in these publications, the rack plate is run at a constant speed by the bias of the spring,
The shutter disk is rotated using this drive. In Japanese Patent Application Laid-Open No. 5-303131, a pair of non-circular gears are incorporated in a drive transmission system between a rack plate and a shutter disk to rotate the shutter disk at a non-uniform speed so that the exposure time is longer than each exposure time. The interval is obtained. Also,
In Japanese Patent Application Laid-Open No. 5-307208, an intermittent gear mechanism is incorporated in a drive transmission system between a rack plate and a shutter disk to rotate the shutter disk intermittently so that an exposure interval longer than each exposure time can be obtained. ing.

[0007]

However, the shutter devices described in JP-A-5-303131 and JP-A-5-307208 use special gears such as a pair of non-circular gears and an intermittent gear mechanism. And the processing cost increases.

In the shutter device described in JP-A-5-303131 and JP-A-5-307208, when the rack plate is returned to the charging position in conjunction with film winding, the shutter disk rotates in the reverse direction. Therefore, during the film winding, the slit of the shutter disk crosses the shutter opening to perform double exposure, so that it is necessary to shield each shutter opening during the film winding. In order to prevent such an adverse effect, it is easy to provide a full shielding plate in addition to the shutter disk and to incorporate a mechanism for closing each shutter opening with the full shielding plate during film winding. When the mechanism is provided, the number of parts increases, the assembly becomes difficult, and the cost is easily increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and a first object of the present invention is to provide a continuous shooting shutter device capable of obtaining an exposure interval longer than each exposure time at a low cost. A second object of the present invention is to provide a continuous shooting shutter device which can achieve a low-cost means for preventing double exposure that occurs during film winding.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, there are provided four shutter openings arranged in two stages vertically and two rows right and left on the circumference; A slit is formed on the same radius as the shutter disk, and a shutter disk that sequentially passes through the slits so as to cross the four shutter openings to determine an exposure time, and is arranged rotatably coaxially with the shutter disk. A hole is formed on the same radius as the circumference, and a timing disk for determining an exposure interval by sequentially passing through the holes so as to cross the four shutter openings, and the slit and the hole are arranged in a circumferential direction. Rotating means for rotating the shutter disk and the timing disk from each other at a constant rotational speed at different rotational speeds.

[0011]

The rotating means simultaneously rotates the shutter disk and the timing disk at a constant speed from the position where the slit and the hole are shifted in the circumferential direction. Here, the exposure time is determined by the rotation speed of the shutter disk, the number of exposures is determined by the rotation ratio between the shutter disk and the timing disk, and the exposure order is the rotation of the shutter disk and the timing disk. Determined by the direction.
The exposure interval is determined by the rotation speed of the timing disk. According to this, for example, the shift amount in the circumferential direction between the slit and the hole is shifted by an angle of 180 °,
When the speed ratio between the shutter disk and the timing disk is set to 3: 1, and the rotation direction of the shutter disk and the timing disk is rotated in the reverse direction, each exposure time is changed during one rotation of the timing disk. Four exposures are obtained with a much longer exposure interval than.

If the rotating means is linked to the constant speed movement of the traveling plate, the shutter disk and the timing disk are rotated again by the film winding operation, and double exposure is performed. Therefore, according to the third aspect of the present invention, when the traveling plate is charged from the traveling completion position toward the charging position, the one-way clutch means for linking the shutter disk and the timing disk is incorporated in the rotating means. Things.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a lens-fitted film unit 10 (hereinafter referred to as "film unit").
It comprises a front cover 11, a shutter unit 12 for continuous photographing, a main body base 13, and a back cover 14, and the shutter unit 12 is incorporated between the front cover 11 and the main body base 13.

On the front surface of the shutter unit 12 for continuous shooting, a total of four photographing lenses 12a to
12d is incorporated. Shooting lenses 12a to 12d
Are integrally formed on a single resin-molded plate. The optical axes of the photographing lenses 12a to 12d are parallel. The body base 13 is integrally provided with a dark box 16 having four openings 15a to 15d formed on the optical axis of the taking lens. On the dark box 16, a film winding stop mechanism 17 and a film counter mechanism 18 are provided.

An unexposed film roll chamber (hereinafter simply referred to as a film roll chamber) 19 is provided on both sides of the dark box 16.
And a patrone chamber 20 are provided integrally. In the patrone room 20, a film 2 having a width of 35 mm is previously set at the time of assembly.
A patrone 22 for accommodating 1 in a light-shielded state, and a film roll 21a drawn out of the patrone 22 into a roll form are loaded in the film roll chamber 19, respectively. Then, the main body base 13 is covered with the rear cover 14 so that the film roll 21a and the cartridge 22 are covered.
Is positioned on an aperture formed on the rear surface of the main body base 13. At this time,
The sprocket 64 to be described later is a perforation 21c.
Become bite.

The patrone 22 and the film 21 used here are based on international standards (ISO: 1007-197).
This is a 35 mm film (135 film) with a patrone specified in the 9th edition), and the rear end of the film 21 is fixed to a core 22 a provided on the patrone 22.

In the upper part of the patrone chamber 20, a hoisting knob 23 is provided. The hoisting knob 23 is provided with a fork 23a that engages with the winding core 22a of the patrone 22. By operating the winding knob 23 in the direction of the arrow in the drawing, the winding core 22a is rotated, and the film 21 that has been photographed is wound into the cartridge 22. It should be noted that the winding knob 23 is turned in the opposite direction to the winding direction.
A tooth row 23b is formed on the outer periphery of the hoisting knob 23, and a check pawl 24 made of a leaf spring is engaged with the tooth row 23b.

The rear cover 14 is integrally provided with a pull-top lid 14a for covering the bottom of the patrone chamber 22. With the lid 14a opened, the patrone 22 containing the photographed film can be taken out of the patrone room 20. The rear cover 14 is integrally formed with a finder eyepiece window 14b and an opening 14c for exposing the winding knob 23 so as to be operable externally.

On the front cover 11, a shutter button 26,
Viewfinder objective window 27, each photographing lens 12a-12d
The apertures 11a to 11h and the number-of-photographs display window 28, which are arranged on the optical axis, are integrally provided. The shutter button 26 is formed integrally with a part of the upper surface of the front cover 11 cut out, and is pressed when the shutter is released. When the pressing operation is released, the shutter button 2
6 returns to its original position due to its own elasticity.

A shutter unit 12 is detachably mounted on the front surface of the main body base 13 by means of a hook or the like. The photographing lenses 12a and 12b are integrally formed on one lens plate 29 integrally formed of a transparent resin such as acrylic, and the photographing lenses 12c and 12d are integrally formed on the other lens plate 30. . The shutter unit 12 incorporates a finder 31 including an eyepiece and an objective lens.

As shown in FIGS. 3 and 4, the inside of the dark box 16 has four rooms partitioned into a cross. These rooms are arranged on the respective optical axes of the photographing lenses 12a to 12d. The aperture 13 has a full size, L1 is 36 mm, and L2 is 24 mm.

FIG. 1 shows the shutter unit 12. The shutter unit 12 includes aperture stops 34a to 34d arranged behind the photographing lenses 12a to 12d,
5, a timing disk 36, a traveling plate 39, a charge lock lever 40, a governor mechanism 41, and the like. Shutter disk 35, timing disk 36, traveling plate 3
The components such as 9 and the governor mechanism 41 are housed in a dark room box 44 composed of a front lid 42 and a case 43. The shutter unit 12 is attached to the main body base 13 so that the film winding stopping mechanism 17
And a film counter mechanism 18.

The photographing lenses 12a to 12d are provided on the front lid 46.
The four aperture openings 34a to 34d are formed on the optical axis. These aperture openings 34a to 34d also serve as fixed apertures and shutter apertures, and have the same inner diameter. A shutter disk 35 is arranged behind the aperture openings 34a to 34d, and a timing disk 36 is arranged behind the shutter disk 35, and these are mounted on a rotating shaft 45 implanted in the case 43. Each is rotatably supported. The case 43 has openings 43a to 43a on the optical axis of the photographing lenses 12a to 12d, respectively.
3d is formed, and the subject light passing through these openings 43a to 43d is guided to the openings 15a to 15d of the dark box 16.

The rotary shaft 45 has four aperture openings 34a to 34a-3.
It is set at a position equidistant from 4d and is located on the center line of the aperture 13. Also, the shutter disk 3
5 and the timing disk 36 have the same outer diameter.
The gears 35a, 36a
Are formed. In FIG. 1, the front lid 42 and the case 43 are omitted to avoid complication of the drawing.

The traveling plate 39 is provided movably between a charging position along the film feeding direction and a traveling completed position, and is urged by a spring 46 toward the traveling completed position. Then, the traveling plate 39 is moved leftward from the traveling completion position by the winding operation of the winding knob 23 and is moved to the charging position.

A charge lock lever 40 provided on the shutter unit 12 is disposed on the left side of the traveling plate 39. The charge lock lever 40 has a lock claw 40a provided on one end side and a pressing plate 40b provided integrally on the other end side, and is rotatably disposed by a rotation shaft 40c provided therebetween. The locking claw 40a is provided on the traveling plate 3
9 and engages with the locked portion 39a provided at the position 9, and holds the traveling plate 39 at the charge position. The pressing plate 40b is located below the shutter button 26, and is pressed by a pressing operation of the shutter button 26 to rotate the charge lock lever 40 counterclockwise about the rotation shaft 40c. By this rotation, the engagement between the lock claw 40a and the locked portion 39b is released, and the traveling plate 39 moves toward the traveling completion position by the bias of the spring 46.

The running plate 39 is formed integrally with a rack gear 39b. The rack gear 39b is provided with a shutter disk 35, a timing disk 36,
A gear train is incorporated for transmission to the motor and the governor mechanism 41, respectively. The gear train first includes the traveling plate 36.
For transmitting the traveling drive of the vehicle to the timing disk 36.
A second gear train for transmitting the rotation obtained from the gear train and the timing disk 36 to the shutter disk 35 at an increased speed, and a third gear train for transmitting the rotation obtained from the shutter disk 35 to the governor mechanism 41. It is composed of

The first gear train includes a gear 48 meshing with the rack gear 39b, a gear 49 integrally formed with the gear 48, a gear 50 meshing with the gear 49, and a gear 50 formed integrally with the gear 50. Gear 5 meshing with 36a
The timing disk 36 is rotated once while the traveling plate 39 moves from the charging position to the traveling completion position. This rotation is counterclockwise about the rotation axis 45.

The second gear train is formed integrally with a gear 52 meshing with the gear 36a of the timing disk 36, a gear 53 integrally formed with the gear 52, a gear 54 meshing with the gear 53, and a shutter 54. A gear 55 meshes with a gear 35a of the disk 35, and the shutter disk 35 is rotated three times while the timing disk 36 makes one rotation. This rotation is clockwise about the rotation axis 45.

The shutter disk 35 has one slit 35b, and the timing disk 36 has one long hole 36b.
b are formed respectively. The slit 35b is formed on the same radius from the rotation axis 45, and this radius is
The distance is set equal to the distance from the rotation shaft 45 to the four aperture openings 34a to 34d. The slit 35b has a slit length (length in the radial direction of the shutter disk) of the aperture opening 34.
a to 34d or more. The initial position of the slit 35b is located on the right side on a horizontal line passing through the rotation shaft 45, and the slit 35b crosses each of the aperture openings 34a to 34d three times by three rotations of the shutter disk 35.
The elongate hole 36b is provided with four aperture openings 34a to
It is formed along a circumference having a radius up to 34d.

The slit 35b has four aperture openings 34a-34.
If it crosses 34d three times, triple exposure will be performed. Therefore, by rotating the long hole 36b provided in the timing disk 36 once, the exposure order can be easily understood while the slit 35b crosses the aperture openings 34a to 34d.
In addition, only four exposures are selected so that the exposure interval is longer than the exposure time. This long hole 36b
Each stop aperture 34 is rotated by one rotation of the timing disk 36.
a through 34d one time at a time,
The position shifted by 80 ° is the initial position. Since the shutter disk 35 and the timing disk 36 rotate simultaneously in opposite directions, and their rotation ratio is 3: 1, the slit 35b and the slot 3
6b overlaps four times with each other at the positions of the aperture openings 34a to 34b, and exposure is performed when these overlap. The order of these exposures is as follows: from the aperture opening 34a in the counterclockwise direction about the rotation axis 45, the aperture opening 34b, the aperture opening 3
4c and the aperture 34d in this order. Each exposure time is determined by the time that the slit 34b crosses the aperture openings 34a to 34d. For example, the rotation speed of the shutter disk 35 is determined to be about 1/250 second.

When the film winding operation of the winding knob 23 is performed, the shutter disk 35 and the timing disk 36 are reversed, and double exposure is performed. Therefore, in order to eliminate such adverse effects, during film winding,
The gear 51 of the two-stage gear composed of the gear 50 and the gear 51 incorporated in the first gear train is separated from the gear 36b of the timing disk 36 so that the charge movement of the traveling plate 39 is not transmitted to the timing disk 36. One-way clutch mechanism is built in.

The one-way clutch mechanism comprises an elongated hole 59 and a spring 6
0. The long hole 59 is provided between the gear 50 and the gear 51 between a meshing position where the gear 51 meshes with the gear 36b of the timing disk 36 in a state where the gear 50 and the gear 49 mesh with each other, and a meshing releasing position separated therefrom. Axis 58
Is movably supported. The spring 60 biases the shaft 58 toward the meshing position. The long hole 58 is formed in such a shape that the shaft 58 moves to the meshing position and the meshing releasing position in accordance with the rotation direction of the gear 49. Thus, when the traveling plate 39 moves from the charge position to the traveling completion position, the gear 49 rotates in the counterclockwise direction, and the rotation of the gear 49 in the counterclockwise direction causes the gear 50 to shift the gear 51 to the timing. A rotational force acts in a direction in which the disk 36 meshes with the gear 36b. Therefore, the shaft 58 moves toward the meshing position in the elongated hole 59. When the traveling plate 39 moves from the traveling completion position toward the charging position, the gear 49 rotates clockwise, and the clock 51 rotates the gear 49 so that the gear 51 is connected to the timing disk 36.
Rotational force acts in the direction away from the gear 36b.
Therefore, the shaft 58 moves toward the disengagement position within the elongated hole 59.

The traveling plate 39 is connected to a charging mechanism for moving the traveling plate 39 to a charging position in conjunction with film winding. The charging mechanism includes a rack gear 61, a two-stage gear 62, a gear 63, and a sprocket 64 protruding toward the rear side. Two-stage gear 62
, A notch gear 65 is integrally fixed on the gear 62a. The notch gear 65 has a sprocket 64
The rotation of the sprocket 64 is transmitted because the gear 63 fixed coaxially with the gear 63 is engaged.

As is well known, the sprocket 64 is provided with nine teeth. One rotation of the sprocket 64 feeds the film 21 by one frame length, and the two-stage gear 62 makes one rotation. .

The notch gear 65 has a notch 6 at its outer periphery.
5a and a gear portion 65b that meshes with the rack gear 61. The gear portion 65b moves the traveling plate 39 to a position slightly over the charging position during film winding. The notch 65a faces the rack gear 61 when the traveling plate 39 moves to the charging position,
The traveling plate 39 can travel independently. Sprocket 64
Is rotated once, the meshing between the gear portion 65b and the rack gear 61 is released, and the notch portion 65a is formed in the rack gear 61.
Are facing each other. At this time, since the traveling plate 39 has been moved to the charge position and is held by the charge lock lever 40, there is no problem even if the engagement between the gear portion 65b and the rack gear 61 is released.

As shown in FIGS. 5 and 6, the film winding stop mechanism 17 includes a timing disc 80,
1, a detection lever 82, and a cam surface 83. The timing disk 80 is formed coaxially with the sprocket 64, and has a hole 80a formed on the upper surface thereof. The locking lever 81 is provided rotatably with respect to a shaft 84 arranged in parallel with the optical axis, and is urged clockwise by a spring 85. At one end of the locking lever 81, a locking claw 81a protruding rearward is provided.

The locking claw 81a rotates between a locked position where it enters the hole 80a and a retracted position where it is retracted from the hole 80a.
At the other end of the locking lever 81, a protruding portion 81b is provided integrally. When the locking claw 81a is at the lock position, the protrusion 81b engages with the bottom surface of the winding knob 23 to lock the rotation of the winding knob 23. On the opposite side of the locking claw 81a, the other end 82 of the detection lever 82 projects forward.
A connecting rod 81c that engages with a is provided integrally.

The detection lever 82 is provided rotatably about a shaft 86 arranged in parallel with the optical axis.
Is biased clockwise. This detection lever 82
Is provided with a rotatable roller 82b at one end.
The roller 82b slides on the cam surface 83. The cam surface 83 is provided integrally on the rear side of the traveling plate 39, and has a configuration including a slope 83a and a flat surface 83b. Slope 83
a, the roller slides when the traveling plate 39 is at the traveling completed position,
The locking lever 81 is rotated so that the locking claw 81a is moved to the retracted position. Further, when the traveling plate 39 is moving between the position where the traveling plate 39 has slightly moved from the traveling completion position and the charging position, the roller 82b slides, and the locking lever 81 moves.
Rotate to the locked position.

The film counter mechanism 17 is composed of a one-tooth gear 90 fixed coaxially with the sprocket 64 and a well-known photographing number display plate 91 meshing with the one-tooth gear 90. One rotation rotates the number-of-photographs display plate 91 by one division. On the upper surface of the number-of-photographs display plate 91, a scale for displaying the remaining number of frames to be captured is provided. This scale is the front cover 11
Can be observed through the number-of-photographs display window 28.

In the present embodiment, as shown in FIG. 7, the apertures 34a to 34d are arranged at the centers of the four continuous shooting screens 95a to 95d in consideration of the amount hidden by the negative mask used at the time of printing. On the other hand, the center 9 of the exposure screen 94
It is arranged at a position closer to 4a. Further, each of the aperture openings 34a to 34
and d are not evenly distributed, and the angle θ shown in FIG.
1 is about 35.8 ° and the angle θ2 is about 108.5 °.

FIG. 8 shows that, during one rotation of the timing disk 36, the slit 35b and the elongated hole 36b form the respective aperture openings 34a to 34a.
It is a graph which shows the timing which overlaps at the position of 4b. As described above, since the angles of the apertures 34a to 34d are not evenly allocated, the center of the elongated hole 36b does not exactly overlap at the position where the slit 35b and each of the apertures 34a to 34b overlap. Therefore, the length of the elongated hole 36b is increased so that exposure can be performed at a position where the slit 35b and each of the aperture openings 34a to 34b overlap. This long hole 36b
Is desirably a length that falls within a range of an angle smaller than the above-described θ1.

The operation of the above configuration will be described. The initial state of the shutter unit 12 is a state where the aperture openings 34 a to 34 d are shielded by the shutter disk 35 and the timing disk 36 as shown in FIG. 9. Then, the traveling plate 39 is in the traveling completed position. Slit 3
5b is located on the right side of the horizontal axis passing through the rotating shaft 45, and the elongated hole 36b is located on the left side of the horizontal axis passing through the rotating shaft 45. Also, the film winding stopping mechanism 17
Since the roller 82b is located on the slope 83a of the cam 83, the roller 82b is in a retracted position retracted from the hole 80a of the locking claw 81a. Thereby, the rotation operation of the winding knob 23 is allowed.

When a film winding operation of the winding knob 23 is performed, the film 21 is wound toward the inside of the cartridge 22. By the transfer of the film 21, the sprocket 64 meshing with the perforation 21c is formed.
Rotates counterclockwise as shown in FIG. Sprocket 64
Is transmitted to the gear 62a of the two-stage gear 62 via the gear 63. Thereby, the notch timing disk 65 rotates clockwise. When the winding operation is continuously performed, the gear portion 65b meshes with the rack gear 61. As a result, the traveling plate 39 moves toward the charge position.

When the traveling plate 39 moves toward the charging position, the one-way clutch mechanism operates to separate the gear 51 from the gear 36a of the timing disk 36. That is, when the traveling plate 39 moves from the traveling completion position toward the charging position, the gear 49 rotates clockwise, and the clockwise rotational force of the gear 49 causes the shaft 58 of the gear 50 to move in the elongated hole 59. The gear 51 is moved toward the disengagement position to disengage the gear 51 from the gear 36a of the timing disk 36. Thus, during film winding, the shutter disk 35 and the timing disk 36 do not rotate, so that double exposure is not performed. Further, since the connection with the governor mechanism 41 is released, the film winding operation of the winding knob 23 can be smoothly performed.

While the traveling plate 39 is being charged, the film winding stop mechanism 17 does not operate. That is, the traveling plate 3
The cam surface 83 also moves in conjunction with the charging movement of No. 9, and the roller 82b slides from the inclined surface 83a to the flat surface 83b. At this time, the detection lever 82 rotates counterclockwise about the shaft 86, and the locking lever 81 moves the spring 85
Rotates clockwise about the shaft 84.
Thereby, the locking claw 81a of the locking lever 81 rotates toward the locked position. At this time, since the hole 80a of the timing disk 80 rotates in synchronization with the sprocket 64, the locking claw 81a slides on the upper surface of the timing disk 80 without entering the hole 80a as shown in FIG. It will be in the state of having done. For this reason, the film winding operation can be continued.

When the film winding operation is continuously performed, the locked portion 39b of the traveling plate 39 comes into contact with the lock claw 40a of the charge lock lever 40.
The surface on the side where the lock claw 40a comes into contact with the locking claw 40a is formed as a slope, so that the charge lock lever 40 is
, And the lock claw 40a escapes from the locked portion 39b. Therefore, the traveling plate 39 is continuously charged and moved, as shown in FIG.
9 moves to a position slightly over the charging position.

When the film is wound up by the length of one frame, the sprocket 64 makes exactly one rotation. At this time, the locking claw 81a of the locking lever 81 is
The sprocket 64 is prevented from rotating by entering the zero hole 80a. Further, at this time, the protrusion 81 of the locking lever 81
b engages with the lower surface of the hoisting knob 23 and the hoisting knob 2
3 is prevented from rotating.

When the sprocket 64 makes one rotation, the notch 65a is located at a position facing the rack gear 61, so that the engagement between the rack gear 61 and the gear 65b is released, and the running plate 39 is biased by the spring 46. After slightly moving to the traveling completion position, charge lock lever 4
When it is 0, it is locked at the charge position, and the state shown in FIG. At this time, the traveling plate 39 slightly moves toward the traveling completion position, so that the one-way clutch mechanism is activated to operate the gear 5.
1 is meshed with the gear 36a of the timing disk 36. That is, when the traveling plate 39 moves toward the traveling completion position, the gear 49 rotates in the counterclockwise direction, and the shaft 58 of the gear 50 meshes in the elongated hole 59 by the rotating force of the gear 49 in the counterclockwise direction. Moving toward the position, the gear 51 and the gear 36a of the timing disk 36 mesh with each other. In this state, the spring 6
It is pressed to the meshing position by the urging of zero.

The framing is performed by looking through the finder eyepiece window 14b, and the shutter button 26 is pressed when the subject starts the golf backswing and comes to the top position. As a result, the charge lock lever 40 is moved in conjunction with the shutter release as shown in FIG.
c, the lock claw 40a is disengaged from the locked portion 39a of the traveling plate 39, and the traveling plate 39 is
The urging member 6 moves toward the traveling completion position.

When the traveling plate 39 moves, its driving is
The power is transmitted to the timing disk 36 via the rack gear 39b, the gear 48, the gear 49, the gear 50, and the gear 51, and the timing disk 36 rotates counterclockwise. Further, the drive of the traveling plate 39 is also transmitted to the shutter disk 35 via the gear 36b, the gear 52, the gear 53, the gear 54, and the gear 55 of the timing disk 36, and the shutter disk 35 rotates clockwise. . When the shutter disk 35 and the timing disk 36 rotate at a speed ratio of 3: 1 and rotate in opposite directions to each other, four exposures are performed in time series.

The first exposure is performed at the aperture opening 34a. That is, when the slit 35b rotates clockwise by an angle of 144.2 ° from the right position on the horizontal line passing through the rotation axis 45, the slit 35b reaches the aperture opening 34a.
As shown in the figure, the elongated hole 36b is set at 144.2 ° in the counterclockwise direction from the left side position on the horizontal line passing through the rotary shaft 45 to 1
/ 3, or 48.1 °. At this time, since the rear end side of the long hole 36b in the rotation direction is over the aperture 34b, the first exposure is performed. Although the slit 35b passes through the aperture opening 34b before reaching the aperture opening 34a, no exposure is performed at this point because the aperture 34b is shielded by the timing disk 36. .

The second exposure is performed at the position shown in FIG. That is, when the slit 35b rotates clockwise by about 251.5 ° from the aperture opening 34a, the slit 35b reaches the aperture opening 34b, and at this time, the elongated hole 36b is about 83.8 counterclockwise from the aperture opening 34a. , The exposure is performed because the leading end side of the long hole 36b in the rotation direction covers the stop opening 34b.

The third exposure is performed at the position shown in FIG. That is, when the slit 35b is rotated clockwise by an angle of about 288.5 ° from the aperture opening 34b, the slit 35b reaches the aperture opening 34c. At this time, the elongated hole 36b is moved about 96.2 counterclockwise from the aperture opening 34b. , The rear end side in the rotation direction of the elongated hole 36b is in contact with the aperture opening 34c, so that exposure is performed.

The last exposure is performed at the position shown in FIG. That is, when the slit 35b rotates clockwise by about 251.5 ° from the aperture opening 34c, the slit 35b reaches the aperture opening 34d.
4c, rotates about 83.8 ° in a counterclockwise direction.
Since the front end side in the rotation direction of 6b covers the stop aperture 34d, the last exposure is performed.

Thereafter, when the traveling plate 39 reaches the traveling completed position and stops, the slit 35b rotates clockwise from the aperture opening 34d by an angle of about 144.2 °, and the elongated hole 36b moves from the aperture opening 34d. Approximately 48.1 counterclockwise
After rotating by degrees, the state returns to the state shown in FIG. This state is
The timing disc 36 is in a state of one rotation,
Therefore, the shutter disk 35 is in a state of three rotations.

In the continuous photographing performed four times in chronological order with one shutter release, each exposure interval is set as shown in FIG.
As shown in FIG. 5, the exposure time is longer than each exposure time, and the continuous shooting time from when the first exposure is performed to when the last exposure is completed is about 0.8 seconds. During this time, since the roller 82b of the detection lever 82 is slid on the flat surface 83b of the cam surface 83, the timing disc 8
The locking claw 81a of the locking lever 81 enters the hole 80a of No. 0. Therefore, even if the winding operation is performed during photographing, the film is not wound.

When the movement of the traveling plate 39 is completed, the roller 82b of the detection lever 82 is moved to the slope 8 of the cam surface 83.
It slides to 3a. For this reason, the detection lever 82 is
And the locking lever 81 rotates counterclockwise about the shaft 84 in conjunction with this rotation.
The locking claw 81a of the locking lever 81 is retracted from the hole 80a of the timing disk 80 to release the rotation lock of the sprocket 74, and the ridge 81b is pulled up by the winding knob 23.
, The lock of the winding operation of the winding knob 23 is also released.

By repeating photographing in this manner, the exposed film 21 is sequentially placed in the cartridge 2.
It gets caught in 2. After the photographing is completed, it is submitted to a developing laboratory as it is. When processing is carried out in a developing station, the cartridge 22 is taken out from the bottom cover 14a of the rear cover 14 so that a developed photographic film 21 can be obtained by performing conventional developing processing. As shown in FIG. 17, the subject image is recorded in time series on the four continuous shooting screens 95a to 95d in the developed photographic film 21. Then, when the developed photographic film 21 is subjected to conventional print processing, a print photograph 100 shown in FIG. 18 is obtained. 17 and 18
Are given to represent the order of photographing, and are not recorded images.

In the above embodiment, the slit 35b and the long hole 3
The shutter disk 35 and the timing disk 36 are rotated in reverse at a speed ratio of 3: 1 from a position where the timing disk 6b is shifted by an angle of 180 ° in the circumferential direction, and one of the timing disks 36 is rotated.
Four exposures are obtained during rotation. However, the present invention is not limited to this, and the slit 35b and the long hole 36b may be sequentially overlapped on the four aperture openings 34a to 34d. For example, there is no limitation on the speed ratio, the rotation direction, the shift angle of the slit, and the like. For example, the shutter disk 35 and the timing disk 3 are shifted from a position where the slit 35b and the elongated hole 36b are shifted by 180 ° in the circumferential direction.
6 is rotated at the same speed in the same direction at a speed ratio of 5: 1, and four exposures are obtained in a time series at an exposure interval longer than each exposure time during one rotation of the timing disk 36. Since these exposures are performed during one rotation of the timing disk 36, the continuous shooting time from the first exposure to the completion of the last exposure can be kept constant.

[0061]

As described above, according to the present invention, the rotating means simultaneously moves the shutter disk and the timing disk at different rotational speeds from the position where the slit and the hole are shifted in the circumferential direction. By rotating at a constant speed to obtain four exposures at an exposure interval longer than each exposure time, the mechanism can be simplified and achieved at low cost. Also, since the rotation axes of the shutter disk and the timing disk are not shifted,
Compactness can be achieved. According to the third aspect of the present invention, the rotating means is linked to the constant speed movement of the traveling plate, and when the traveling plate is charged from the traveling completion position to the charging position, the shutter disk and the timing disk are moved. Since the one-way clutch means that cooperates with the above is incorporated in the rotating means, double exposure that occurs during film winding can be prevented at low cost without using a large-scale shielding plate or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a shutter unit.

FIG. 2 is an exploded perspective view of the film unit with a lens.

FIG. 3 is a cross-sectional view of the film unit with a lens.

FIG. 4 is a longitudinal sectional view of the lens-fitted film unit.

FIG. 5 is an explanatory view schematically showing a film stopping mechanism.

FIG. 6 is a plan view showing a main part of a film winding stopping mechanism.

FIG. 7 is an explanatory diagram showing a positional relationship between an exposure screen of a photographic film set on an aperture and an aperture opening.

FIG. 8 is a graph showing rotation positions of a shutter disk and a timing disk with respect to a moving time of a traveling plate.

FIG. 9 is a schematic explanatory view showing an initial state of a shutter mechanism.

FIG. 10 is a schematic explanatory view of a shutter mechanism showing a state in which a one-way clutch is operated.

FIG. 11 is a schematic explanatory view of a shutter mechanism showing a state in which the traveling plate has moved to a position slightly over the charging position.

FIG. 12 is a schematic explanatory view showing a state in which a traveling plate is held at a charge position.

FIG. 13 is a schematic explanatory view of a shutter mechanism showing a state at the moment of performing first exposure after shutter release.

FIG. 14 is a schematic explanatory view of a shutter mechanism showing a state at a moment when a second exposure is performed.

FIG. 15 is a schematic explanatory view of a shutter mechanism showing a state at a moment when a third exposure is performed.

FIG. 16 is a schematic explanatory view of a shutter mechanism showing a state at the moment of performing the last exposure.

FIG. 17 is an explanatory diagram of a developed photographic film in which an exposure screen on which a subject image is recorded is viewed from an emulsion surface side.

FIG. 18 is an explanatory diagram showing an obtained print photograph.

[Explanation of symbols]

 12a-12d Photographic lens 17 Film stopping mechanism 34a-34d Aperture opening 35 Shutter disk 35b Slit 36 Timing disk 36b Elongated hole 39 Running plate 41 Governor mechanism 64 Sprocket

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 39/00-39/06 G03B 9/08-9/54 G03B 15/00 G03B 17/02 G03C 3/00

Claims (4)

(57) [Claims] 1. A shutter disk having a slit formed by a single shutter release is rotated at a constant speed, and sequentially passes through the slits so as to cross a plurality of shutter openings. The shutter device for continuous photographing, which performs a plurality of exposures on the shutter, comprises four shutter openings arranged in two stages vertically and two rows on the circumference, and a slit formed on the same radius as the circumference. A shutter disk for sequentially determining the exposure time by passing through the slits across the two shutter openings; and a shutter disk coaxially and rotatably disposed with a hole having the same radius as the circumference. A timing disc for determining an exposure interval by sequentially passing through the holes so as to cross the four shutter openings, and a position in which the slits and the holes are shifted in the circumferential direction. Wherein the shutter disc and the timing disc, continuous shutter device characterized by comprising a rotating means for rotating each constant velocity at a rotational speed different from each other from. 2. The rotating means rotates the shutter disk and the timing disk in opposite directions at a rotation ratio of 3: 1 from a position where the slit and the hole are shifted by 180 ° in the circumferential direction. 2. The shutter device according to claim 1, wherein the shutter is operated. 3. The rotating means rotates the shutter disk and the timing disk in the same direction at a rotation ratio of 5: 1 from a position where the slit and the hole are shifted by 180 ° in the circumferential direction. 2. The shutter device according to claim 1, wherein the shutter is operated. 4. When the rotating means is linked to a traveling plate that moves at a constant speed from a charging position to a traveling completion position by a shutter release operation, and when the traveling plate moves from the traveling completion position to the charging position, 4. The shutter device according to claim 1, wherein a one-way clutch for establishing a link between the shutter disk and the timing disk is incorporated in the rotating unit.