JP2563143B2 - Shutter device for continuous shooting - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous-use shutter device that sequentially performs exposure at short time intervals by one release operation.

[Conventional technology]

If you take pictures of a moving subject sequentially with a time lag, you can get a photographic image that has stopped moving at each shooting moment, so for example, in sports etc., observe each form as a still image. It is possible and very convenient.

Such a continuous shooting function can be obtained by taking a picture with a motor-driven camera every time the film is wound up one frame at a high speed, but the limit is about four frames per second, and the film winding and shooting are performed. However, there is a drawback in that the mechanism is complicated and the cost is increased. Further, since several frames are photographed in one continuous shooting, the amount of film consumption is increased, and there is a problem that it is not possible to perform too many continuous shooting in one film.

Against this background, as seen in Japanese Patent Publication No. 41-13352 and Japanese Unexamined Patent Publication No. 2-105132, a continuous shooting camera is proposed in which shooting is performed sequentially through a plurality of exposure apertures by one release operation. Has been done. In the camera described in the former publication, shutter blades are provided in each of the plurality of exposure apertures, and these shutter blades are mechanically scanned to sequentially perform photographing. The camera described in the latter publication has four exposure apertures so that the continuous shooting screens are arranged in a "out" shape, and one rotary shutter plate is rotated once. Only by doing so, a continuous shooting screen of four frames that are temporally shifted is taken.

[Problems to be Solved by the Invention]

However, in the case where a shutter blade is provided for each of a plurality of exposure apertures, many continuous shooting screens can be taken by one continuous shooting, but a shutter blade is required for each exposure aperture. The number of points increases and the cost increase cannot be avoided. Further, in the case of rotating one shutter plate and shooting a plurality of continuous shooting screens at positions equidistant from the center of rotation, it is possible to increase the number of continuous shooting screens shot in one continuous shooting. Not only difficult, but also "ta"
There is a drawback that it is difficult to understand the temporal order of the continuous shooting screen because it becomes a print photo arranged in a character shape.

[Object of the Invention]

The present invention has been made to solve the above-mentioned drawbacks of the prior art, and its purpose is to perform shooting so that a plurality of continuous shooting screens are arranged in a line along the feeding direction of the film, and yet the structure is An object of the present invention is to provide a shutter device for continuous shooting which is simple and has a small number of parts.

[Means for solving the problem]

The shutter device of the present invention is a disk-shaped device in which a plurality of exposure openings are arranged in a straight line along the film feeding direction, and the respective rotation centers are alternately arranged on the opposite side with respect to the arrangement of the exposure openings. Of two or more shutter plates and openings formed in each of these shutter plates.

Further, at least one of the shutter plates is formed with a plurality of openings at different positions from the center of rotation, and each opening crosses a predetermined exposure opening to perform exposure. In order to efficiently drive the plurality of shutter plates, gears are formed in the shutter plates, these are meshed, and one of them is driven by a motor to rotate the shutter plates at once. At the moment of exposure, the motor is driven at a high speed through the motor control means to obtain a high shutter speed without narrowing the interval between the exposure operations during continuous shooting.

[Action]

When the shutter plate is rotated, each of the openings formed in each shutter plate is exposed across a predetermined position among the plurality of exposure openings. If the shutter plate is provided with a plurality of openings at different distances from the center of rotation,
The exposure apertures that can be opened and closed by these apertures can be placed at different distances from the center of rotation of the shutter plate.The exposure apertures should be arranged in a straight line and the continuous shooting screens should be lined up in a row over time for shooting. You can

When rotating the shutter plate and performing multiple exposures, if the rotation speed of the shutter plate is increased, continuous shooting will end in a short time, and it will not be possible to shoot from the beginning to the end of the motion. On the contrary, if the rotation speed of the shutter plate is slowed, the shutter time becomes long at each exposure, which is not suitable for instantaneous photographing and may cause overexposure. Therefore, the shutter plate is driven by the motor, and the motor control means increases the rotation speed of the motor only at the moment of exposure.

Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

〔Example〕

1 to 3 showing a continuous shooting camera using the present invention, eight photographing lenses are provided on the front surface of a camera body 2.
3a to 3h are horizontally arranged and attached, and the optical axes of the respective lenses are parallel to each other. The taking lenses 3a to 3d are one lens plate 4 made of a transparent resin such as acrylic.
And the taking lenses 3e to 3h are integrally formed on the other lens plate 5.

A shutter substrate 7 having eight exposure openings 6a to 6h corresponding to the taking lenses 3a to 3h is fixed inside the camera body 2. The inner diameters of these exposure openings 6a to 6h are the same. Shafts 8 and 9 are planted on the shutter substrate 7 at equal distances above and below a straight line connecting the centers of the exposure openings 6a to 6h, and rotate the disc-shaped shutter plates 10 and 11, respectively. Supports freely. Therefore, the exposure openings 6a and 6d are equidistant from the axis 8, the exposure openings 6b and 6c are equidistant, and the exposure openings 6e and 6h are equidistant from the axis 9 and the exposure openings 6f and 6g are equidistant. Become equidistant.

The outer circumferences of the shutter plates 10 and 11 are covered with gears 10a and 1
0a are formed and mesh with each other. A stepping motor 12 is fixed to the front surface side of the shutter substrate 7, and a drive gear 13 fixed to the shaft of the stepping motor 12 meshes with a gear 10a of the shutter plate 10. Further, a reflection type photo sensor 14 is attached to the shutter substrate 7, and photoelectrically detects the reflection piece 17 fixed to the shutter plate 10 through the opening 7a of the shutter substrate 7.

As shown in FIG. 4, the shutter plates 10 and 11 have
Two slits 15a, 15b, 16a, 16b are formed in each. The slits 15a and 15b are on the same straight line from the center of the shutter plate 10, and similarly, the slits 16a and 16b are the shutter plate 1
It is on the same straight line from the center of 1. The slits 15a, 1
The 5b or the slits 16a and 16b do not necessarily have to be on the same straight line from the center of the shutter plates 10 and 11, and can be positively shifted in consideration of the timing of photographing.

The slit length of these slits 15a, 15b, 16a, 16b (the length in the radial direction of the shutter plate) is not less than the inner diameter of the exposure openings 6a to 6h. In addition, each outer slit 15a, 16
The slit width of a (circumferential width of the shutter plate) and the slit values of the inner slits 15b and 16b vary depending on the distances from the axes 8 and 9, for example, the outer slit 15
If the slit width of a, 16a is 1 mm, the inner slit 15b,
The slit width of 16b is about 0.7 mm.

The rotation of the shutter plate 10 causes the slit 15a to move in the clockwise direction from the illustrated origin position P _0, and the exposure opening 6a is opened and closed when passing through the first exposure position P ₁ . The shutter plate 10 continues to rotate and the slit 15b moves to the second exposure position P ₂
When passing through, the exposure opening 6b is opened and closed. And
Slit 15b, 15a is a third exposure position P _3, each successively passing the fourth exposure position P _4, the exposure opening 6c, 6d are sequentially opened and closed.

When the shutter plate 10 starts rotating clockwise, the gear 10
The shutter plate 11 rotates counterclockwise by the engagement of a and 11a. Then, after the slit 15a has passed the fourth exposure position P ₄ , the slit 16a of the shutter plate 11 is rotated from the origin position Q ₀ to the fifth exposure position Q ₅ , and the exposure opening 6e is opened and closed when the slit 15a passes. Since the rotation of the shutter plate 10 is continued until the slits 15a and 15b reach the origin position P ₀ again, the shutter plate 11 continues to rotate counterclockwise in conjunction with this and the sixth exposure position Q ₆ and seventh exposure position Q _7, slits 16a in the eighth exposure position Q _8, 16b by exposure opening 6f, 6g, 6h are sequentially opened and closed. The time from the opening and closing of the first exposure opening 6a to the opening and closing of the last exposure opening 6h can be selected from 1 second or 2 seconds by switching the rotation speed of the stepping motor 12. You can do it.

As shown in FIG. 3, a film is provided between the cartridge loading chamber 18 and the winding chamber 19 provided in the camera body 2.
Eight exposure frames 21a to 21h, each of which is divided by a partition wall, are formed along the feeding direction 20. Exposure frame 21a to exposure frame 1
The horizontal lengths up to 2d and from the exposure frame 21e to the exposure frame 21h are the same as the horizontal length for one frame of 35 mm full size screen. The vertical length of each of the exposure frames 21a to 21h is about half that of a 35 mm full-size screen, and is provided at a position where the central portion of the film in the vertical direction is made to pass light. Therefore, when shooting is performed through such exposure frames 21a to 21h, as shown in FIG. 1, four frames are continuously displayed in each of the screens 22a and 22b for one full frame of the film 18 having a width of 35 mm. The photographed screens 24a to 24d and 24e to 24h are exposed.

It should be noted that each of the four frame continuous shooting screens 24a to 24d or
The horizontally long screen with 24e to 24h connected is a screen size for panorama print (for example, 13.7 ± 1) that is obtained when the upper side and the lower side of the full-size frame of the screen are shielded with a width of 6mm each. 0.4mm x 36mm). Then, as shown in FIG. 3, a space is provided between the continuous shooting screen 24d and the continuous shooting screen 24e by the central partition wall 25. Further, the shape of the exposure frame is determined such that the horizontal size of the four continuous shooting screens 24a, 24d, 24e, 24h is longer than the other continuous shooting screens 24b, 24c, 24f, 24g.

The film 20 is a spool 28 provided in the winding chamber 19.
Is wound up by rotating in the counterclockwise direction and pulled out from the cartridge 29 loaded in the cartridge chamber 18.
A motor 30 for winding a film is built in the spool 28, and its driving force is transmitted to a film feeding mechanism 32 via a gear 31. The film feeding mechanism 32 receives the driving force from the gear 31, and the spool is fed through the gear 33 when the film is wound.
28 is driven, and at the time of film rewinding, a rewinding fork 35 is driven via the gear 34.

Sprocket 36 on film perforation 20a
Are engaged and rotated by the feeding of the film 20. The feed length of the film 20 is detected by the sprocket 36 and the encoder 39. The encoder 39 is integrally fixed to the sprocket 36, and has a signal plate 37 having radial through-hole slits, and a photo sensor 38 for photoelectrically detecting the rotation of the signal plate 37.
Consists of The photo sensor 38 counts the number of passing through the through-hole slits when the film is wound, and the feeding amount of the film 20 is
The stop signal of the motor 30 is generated at the moment when the number of frames of 35 mm full size is reached.

FIG. 5 is a block diagram showing the circuit configuration of the continuous shooting camera, and the shooting sequence is controlled by the MPU 40. The MPU 40 receives the release signal input from the release signal generation circuit 42 when the shutter button 41 is pressed, and starts the shooting sequence. The continuous shooting interval setting circuit 43 sets whether to perform continuous shooting of 8 frames / second or continuous shooting of 4 frames / second according to the set position of the frame number setting knob 44.

The R / L mode switching circuit 45 rotates the shutter plates 10 and 11 in the normal rotation direction during continuous shooting according to the set position of the R / L setting knob 46.
Switch to either reverse rotation. That is, when the person who is the subject of continuous shooting makes right-handed movements, the R / L setting knob 4
By setting 6 to the index R, the R / L mode switching circuit 45 inputs the right-handed mode signal to the MPU 40, and the R / L setting knob
When 46 is set to the index L, the left-handed mode signal is input to the MPU 40. A sequence program for continuous shooting is stored in the program ROM 48, and the continuous shooting sequence according to the signals from the continuous shooting interval setting circuit 43 and the R / L mode switching circuit 45 described above is executed.

The driver IC 50 receives the control signal and the clock pulse from the MPU 40 and supplies a drive pulse to the stepping motor 12. As is well known, since the stepping motor 12 rotates in proportion to the number of drive pulses supplied, the rotation angle can be determined by the number of drive pulses, and the rotation speed can be controlled by the frequency of the drive pulse. can do.

The number of drive pulses supplied from the driver IC 50 to the stepping motor 12 is counted by the counter 51. Then, the MPU 40 monitors the count value of the counter 51 and sends a control signal to the driver IC 50 each time the count value reaches a predetermined value. Then, the driver IC 50 changes the frequency and the polarity of the drive pulse supplied to the stepping motor 12 according to the control signal to control the speed and the rotating direction of the stepping motor 12. It should be noted that the shutter plate is completed after one continuous shooting sequence is completed.
When 10 returns to the origin position, a reset signal is input to the counter 51, and the count value is cleared to "0".

Further, the photo sensor 14 sends a detection signal to the MPU 40 when detecting the reflection piece 17 fixed to the shutter plate 10. And MPU
As will be described later, the reference numeral 40 monitors the detection signal from the photo sensor 14 and controls the shutter plate 10 to accurately return to the original position. Reference numeral 53 indicates a driver for driving the film feeding motor 30.

The operation of the continuous shooting camera having the above configuration will be described.

When shooting a right-handed person's golf swing continuously from the top position to the follow-through position at 8 frames / sec, set the R / L setting knob 46 to the index “R” and the frame number setting knob 44 to the index “8”. ". As a result, the shutter plate 10 is rotated clockwise in FIG. 1, and the drive control of the stepping motor 12 is performed so that continuous shooting is performed at 8 frames / sec.

When the subject starts the backswing and reaches the top position, the shutter button 41 is pressed. As a result, the stepping motor 12 starts driving, the shutter plate 10 rotates clockwise through the drive gear 13 in FIG. 1 or 4, and the shutter plate 11 rotates counterclockwise. The shutter plate 10 is then moved to the origin position P ₀ shown in FIG.
From the first to fourth exposure positions P ₁ , P ₂ , R ₃ and P ₄ , the slits 15a and 15b sequentially open and close the exposure openings 6a, 6b, 6c and 6d to the film 20. Is a continuous shooting screen 24a, 24b, 24c, 24
d is exposed. Immediately after continuous shooting screen 24d is exposed, the shutter plate 11 reaches the home position Q ₀ to the fifth exposure position Q _5, continue to pass the sixth to eighth exposure position Q _6, Q _7, Q ₈ Therefore, the exposure openings 6e, 6f, 6g, 6h are sequentially opened and closed by the slits 16a, 16b.

FIG. 6 is a timing chart showing a state of continuous shooting performed at the above-described 8 frames / sec. When the shutter button 41 is pressed at the time of "T = 0", the driver IC 50 supplies a driving pulse whose frequency gradually increases to the stepping motor 12, whereby the stepping motor 12 is driven while being accelerated. The shutter plate 10 is rotated while being accelerated by the driving of the stepping motor 12, and the origin position P ₀ to 30
The slit 15a reaches the exposure opening 6a at the time of T ₁ rotated by ゜, and the continuous shooting screen 24a is photographed first. After that, T ₂ , T ₃ , T
₄ ... Sequential shooting screens 24b, 24c, 24d, ... at each time of T ₈
・ ・ 24h shooting.

As is apparent from the timing chart of FIG. 6, the shutter plates 10 and 11 are rotated at a high speed immediately before the shooting of each continuous shooting screen is performed, and immediately after the shooting is completed, the shutter plates 10 and 11 are decelerated and then rotated at a low speed. This makes it possible to extend the time interval between continuous shootings to about 100 to 500 msec while shooting each transfer screen with an exposure time of about 4 msec. Such rotation control of the shutter plates 10 and 11 is performed by the shutter plate 10
The MPU 40 changes the frequency of the drive pulse supplied to the stepping motor 12 each time the count value of the counter 51 reaches a predetermined value, based on the fact that the rotational position of the counter corresponds to the count value of the counter 51.

In addition, each shutter plate 1 is proportional to the distance from the center of rotation.
The inner slits 15b and 16b of 0 and 11 are the outer slits 15a and 16a.
Since the peripheral speed is slower than that, for example, the time required for the slit 15a to pass through the exposure opening 6a (shutter second) Δ
Comparing t ₁ with the time Δt ₂ required for the slit 15b to pass through the exposure opening 6b, Δt ₁ <Δt ₂ . Therefore, if the inner diameters of the exposure openings 6a and 6b and the slit widths of the slits 15a and 15b are the same, the continuous shooting screen 24b is displayed.
Has a larger exposure amount than the continuous shooting surface 24a. Particularly in continuous shooting, since the frames obtained by continuous shooting are often viewed side by side, variations in the exposure amount tend to be noticeable. To address this, in this embodiment the outer slit 15
The slit widths of the inner slits 15b and 16b are narrowed according to the distances from the axes 8 and 9 with respect to the slit widths of a and 16a so that the exposure amount of each continuous shooting screen 24a to 24h becomes constant. There is. Of course, the exposure amount can be kept constant by making the inner diameters of the exposure openings 6b, 6c, 6f, 6g through which the inner slits 15b, 16b pass smaller than the inner diameters of the other exposure openings.

When the shutter plates 10, 11 rotate 360 ° and return to the origin position, the photo sensor 14 photoelectrically detects the reflecting piece 17, but MP
U40 is also a stepper motor via driver IC50 1
2 is supplied with several driving pulses, and then the stepping motor 12 is rotated in the reverse direction so that the photo sensor 14 again causes the reflection piece 17
The stepping motor 12 is stopped when is detected.
In this way, by detecting the reflection piece 17 twice by the photo sensor 14 and stopping the stepping motor 12, the shutter plate 10 can be accurately stopped at the origin position after one continuous shooting.

In this way, when the continuous shooting screens 24a to 24h of 8 frames are photographed on the film 20, the film feeding mechanism 32 is operated in response to the photographing completion signal, the motor 30 is driven, and the feeding of the film 20 is started. . When the encoder 39 detects the feeding of two 35 mm full size frames, the motor 30 is stopped and the standby state for the next photographing is set.

FIG. 7 conceptually shows the film 20 photographed as described above. As described above, the 4-frame continuous shooting screens 24a to 24d have the same screen size as the panoramic print. Therefore, by performing the panoramic print processing so far, the continuous shooting screens 24a to 24d are printed in the size of two service prints, and the prints of the individual continuous shooting screens 24a to 24d are also sufficiently large. During the panorama print processing, a negative mask having an aperture size shown by a chain double-dashed line 55 in the figure is used, and the continuous shooting screen 24a,
Vignetting occurs at the end of 24d. However, since the lateral size of the continuous shooting screens 24a and 24d is previously large on the film 20, as shown in FIG. 8, a print photograph 57 of the same size can be obtained for each frame.

At present, the panorama print service is provided in units of 35 mm full-size screens, so as shown in FIG. 8, four continuous prints 57, 58 can be obtained from the continuous shooting screens 24a to 24h. . Therefore, if you connect two prints 57 and 58 together, it will be a continuous photo of one continuous shooting, and each frame will be arranged side by side with the passage of time, so the reproducibility of the continuous shooting scene will also be improved. Very advantageous.

In the continuous shooting camera described above, the stepping motor
It is also possible to reverse 12 for continuous shooting. For example, in the case of continuously shooting a golf swing of a left-handed player, the shutter button 41 is pressed after setting the R / L setting knob 46 to the index “L”. When the release signal is input
When the left-handed mode signal is input from the R / L mode switching circuit 45, the MPU 40 sends a control signal for reverse drive to the driver IC 50, and the driver IC 50 supplies a drive pulse of reverse polarity to the stepping motor 12.

When the stepping motor 12 is reversed, the shutter plate 10
Is rotated counterclockwise and the shutter plate 11 is rotated clockwise,
Shooting is performed in the order of continuous shooting screens 24h, 24g, 24f, ... 24a. Then, two print photographs 60 and 61 as shown in FIG. 9 are obtained for one continuous shooting. in this way,
By arranging each frame in order from the right side with the passage of time, it is possible to reproduce a continuous shooting scene that is easy to see in accordance with the movement direction of the left-handed player.

Further, when it is desired to continuously shoot the state of the exercise continuously performed for about 2 seconds, the frame number setting knob 44 is set to the index "4" and shooting is performed. As a result, the driver IC50
A control signal of 4 frames / second is input from the MPU40 and the driver I
C50 maintains the rotation speed of the shutter plates 10 and 11 at the time of exposure constant so that shutter speeds Δt ₁ and Δt ₂ (FIG. 6) can be obtained. Make it even slower. As a result, as shown by the broken line in FIG.
After the continuous shooting screen 24a is shot at T ₁ , the continuous shooting screen 24b is shot at T ₃ , and the continuous shooting screens 24a to 24h are displayed.
Frames will be taken in 2 seconds.

Since the shooting interval can be changed only by adjusting the rotation speed of the stepping motor 12, taking into consideration that the motion speed becomes slow in the initial and final stages of the motion, for example, continuous shooting after shooting the continuous shooting screen 24a. The time interval until the screen 24b is shot, and the continuous shooting screen 24h after shooting the continuous shooting screen 24g
It is also possible to make adjustments such as setting a longer time interval before shooting.

Up to this point, an example has been described in which two shutter plates are used to shoot eight continuous shooting screens out of two 35 mm full size screens in one continuous shooting. Eight continuous shots can be performed using eight shutter plates formed one by one, or the length of the film used in one continuous shot can be changed to three 35mm full-size screens to increase the number of continuous shots. It is possible to further increase. Further, instead of increasing the number of shutter plates, the number of slits formed in one shutter plate may be increased to increase the number of frames of the continuous shooting screen. Although it is advantageous to rotate them simultaneously with a single stepping motor in order to simplify the structure, each of the shutter plates may be rotated with an appropriate timing by an individual stepping motor.

〔The invention's effect〕

As described above, according to the shutter device of the present invention, by rotating two or more shutter plates on both sides of the exposure openings arranged in a straight line along the feeding direction of the film, each shutter plate is rotated. Since exposure is performed by moving the formed openings so as to cross the exposure openings in order, it is possible to shoot continuous shooting screens arranged in a row with a very simple structure, and it is easy to recognize temporal continuity. A continuous shooting scene can be reproduced.

Further, by forming a gear on each of the shutter plates, meshing these with each other, and driving one shutter plate by a motor to follow the other, simplification of the structure is achieved and the shutter plate is The rotation speed for each rotation phase can be easily adjusted, and the time interval between exposures during continuous shooting and the shutter speed during each exposure can be easily set.

[Brief description of drawings]

FIG. 1 is a schematic view of a main part of a continuous shooting camera using the present invention. FIG. 2 is an external view of a continuous shooting camera using the present invention. FIG. 3 is a cross-sectional view of essential parts of the continuous shooting camera shown in FIG. FIG. 4 is an explanatory view of the operation of the shutter plate. FIG. 5 is a block diagram showing the outline of the electrical configuration of the continuous shooting camera. FIG. 6 is a timing chart showing how the shutter plate rotates. FIG. 7 is an explanatory diagram of the film on which the continuous shooting screen is photographed. FIG. 8 and FIG. 9 are explanatory views showing examples of print photographs obtained by the continuous shooting camera of the present invention. 3a to 3h …… Shooting lens 6a to 6h …… Exposure aperture 7 …… Shutter substrate 10,11 …… Shutter plate 15a, 15b, 16a, 16b …… Slit 12 …… Stepping motor 20 …… Film 24 …… Continuous shooting Screen 57,58,60,61 …… Printed photo.

Claims (3)

(57) [Claims] 1. A plurality of exposure apertures arranged in a straight line along the feeding direction of the film, and at least two disc-shaped discs each having a rotation center determined on both sides sandwiching the row of the exposure apertures. Shutter plate and formed on each shutter plate,
A shutter device for continuous shooting, comprising: an opening for performing exposure across a predetermined position among the exposure openings by rotating the shutter plate to one side. 2. A plurality of apertures are formed in at least one of the shutter plates at positions different in distance from the rotation center of the shutter plate, and each aperture crosses an exposure aperture at a predetermined position to perform exposure. The shutter device for continuous shooting according to claim 1, wherein the shutter device is for continuous shooting. 3. Each shutter plate is formed with gears meshing with each other, and each shutter plate is simultaneously rotated by driving one shutter plate by a motor, and each aperture has a corresponding exposure. A motor control means for rotating the motor at a high speed in a rotation phase across the opening, and for rotating the motor at a low speed in a rotation phase in which the exposure opening is blocked by a shutter plate.
The shutter device for continuous shooting according to item 2 or item 2.