JP2818699B2 - 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 continuous shutter device for sequentially exposing at short time intervals by one release operation.

[0002]

2. Description of the Related Art When a moving subject is sequentially photographed with a time lag, a photographic image in which the movement stops at each photographing moment can be obtained. It can be observed as an image and is very convenient. A shutter device for continuous photographing that realizes such continuous photographing is described, for example , in the specification of Japanese Patent Application No. 2-225502 filed by the present applicant.
There are things that have been. In this method, two rotors each having two slit-shaped openings are rotated to sequentially open and close eight exposure openings, and eight continuous photographs are obtained by one release operation. A gear is formed around the two rotors, which mesh with each other,
Further, a driving gear driven by a motor meshes with the gear of one rotor.

[0003]

By the way, in order for the gears engaged with each other to rotate smoothly, it is necessary to allow a little play at the engagement position. Therefore, even if one of the gears stops rotating due to the moment of inertia of the gear, the other gear cannot be stopped immediately but rotates by the amount of play, so-called backlash. Therefore, if the number of meshing positions of the gears is large, the backlash increases, and the opening / closing time of each exposure opening varies. The shutter device for continuous shooting described in the above publication is of a two-rotor type, so that the number of parts is small and the number of gears required for rotating the two rotors is small, that is, the backlash is small. This has the advantage that the opening and closing times can be accurately aligned. However, on the other hand, since the diameter of each rotor is increased, there is a disadvantage that the continuous shooting camera equipped with the rotor becomes large. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and has an object to make the opening and closing time of each exposure opening uniform and to contribute to miniaturization of a continuous shooting camera. It is to provide a device.

[0004]

A shutter device according to the present invention is arranged in a straight line along the film feeding direction.
And eight exposure opening, provided gear the peripheral edge of each circular four shutter plates which are engaged so as to be rotated in unison with rotation of the driving gear, driving and rotating the drive gear Drive motor and one for each of the shutter plates
And an opening for performing exposure across two adjacent exposure openings at a predetermined position among the exposure openings by rotating the shutter plate to one side . Hereinafter, the present invention will be described in detail based on the illustrated embodiment.

[0005]

1 to 3 show a continuous photographing camera using the present invention, eight photographing lenses 3a to 3h are mounted on a front surface of a camera body 2 in a horizontally arranged manner, and light of each lens is provided. The axes are parallel. Shooting lenses 3a-3
d is formed integrally with one lens plate 4 formed of a transparent resin such as acrylic, and the photographing lenses 3e to 3h
Is integrally formed with the other lens plate 5.

A camera lens 3 is provided inside the camera body 2.
A shutter substrate 7 having eight exposure openings 6a to 6h corresponding to a to 3h is fixed. The inner diameters of the exposure openings 6a to 6h are all equal. On the shutter substrate 7, axes 8, 9, 10, 11 are located above and below a straight line connecting the centers of the exposure openings 6a to 6h and at equal distances.
Are implanted, and disk-shaped shutter plates 12, 13, 1 are respectively provided.
4, 15 are rotatably supported. Therefore, axis 8
The exposure opening 6a and the exposure opening 6d are equidistant from each other.
From, the exposure opening 6b and the exposure opening 6c become equidistant,
The exposure openings 6e and 6h are equidistant from the axis 10, and the exposure openings 6f and 6g are equidistant from the axis 11.

[0007] Gears 12a, 13a, 14a, and 15a are formed on the entire outer periphery of the shutter plates 12 to 15, and the gears 12a and 13a and the gears 14a and 15a mesh with each other. A stepping motor 16 is fixed to the front side of the shutter substrate 7, and a driving gear 17 fixed to the shaft of the stepping motor 16 meshes with a gear 13 a of the shutter plate 13 and a gear 14 a of the shutter plate 14. Therefore, when the driving gear 17 is rotated in the counterclockwise direction, the shutter plates 13 and 14 rotate in the clockwise direction, and the shutter plates 12 and 15 rotate in the counterclockwise direction due to the engagement of the gears 13a and 12a and the gears 14a and 15a. I do.

Each of the shutter plates 12 to 15 has one slit 12b, 13b, 14b, 15b. These slits 12b, 13b, 14
The slit length of b and 15b (the length in the radial direction of the shutter plate) is equal to or larger than the inner diameter of the exposure openings 6a to 6h.
Further, as shown in FIG. 3, the positional relationship between the slits 12b, 13b, 14b, and 15b is θ ₂ −θ ₁ = θ ₃ −θ ₂ =
θ ₄ −θ ₃ = 90 degrees, and the shutter plates 12 to 1
5 is rotated 90 degrees, the exposure openings 6a to 6h are sequentially opened and closed by two, and when rotated by 360 degrees, the exposure openings 6a to 6h are rotated.
Opening / closing of all of a to 6h is completed and the state returns to the initial state. Also,
A reflection type photosensor 18 is attached to the shutter substrate 7, and the shutter plate 1 is opened through an opening 7 a of the shutter substrate 7.
The reflection piece 19 fixed to 2 is photoelectrically detected.

By opening and closing the exposure apertures 6a to 6h, as shown in FIG. 1, four continuous shooting screens 24a to 24b are included in one full-size screen 22a, 22b of the 35 mm wide film 20. 24d, 24e to 24h are exposed. In addition, the continuous shooting screen 24 of each four frames
A horizontal screen connecting a to 24d or 24e to 24h is a panoramic print screen size that is obtained when the upper and lower sides of the screen for one full size frame are shielded with a width of 6 mm each. (For example, 13.7 ±
0.4 mm x 36 mm).

The film 20 is wound up by the rotation of the spool 28 in a counterclockwise direction, and is pulled out from the cartridge 29. A film winding motor 30 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, drives the spool 28 via the gear 33 when the film is wound, and the rewind fork 35 via the gear 34 when the film is unwound.
Drive.

A sprocket 36 is engaged with the film perforation 20a, and is rotated by feeding the film 20. The feed length of the film 20 is the sprocket 36
And the encoder 39. Encoder 3
Reference numeral 9 includes a signal plate 37 integrally fixed to the sprocket 36 and having radially formed through-hole slits, and a photosensor 38 for photoelectrically detecting rotation of the signal plate 37. The photo sensor 38 counts the number of passing through the through-hole slits when the film is wound up, and generates a stop signal for the motor 30 at the moment when the feed amount of the film 20 reaches two frames of 35 mm full size.

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

The R / L mode switching circuit 45 controls the shutter plate 12 during continuous shooting in accordance with the set position of the R / L setting knob 46.
The direction of rotation is switched between forward rotation and reverse rotation. That is, when the person to be subjected to continuous shooting makes a right-effect movement, the R / L mode switching circuit 45 sets the R / L setting knob 46 to the index R so that the MPU 4
When a right-handed mode signal is input to 0 and the R / L setting knob 46 is set to the index L, a left-handed mode signal is input to the MPU 40. A sequence program for continuous shooting is stored in the program ROM 48, and a sequence of continuous shooting according to signals from the above-described continuous shooting interval setting circuit 43 and R / L mode switching circuit 45 is executed.

The driver IC 50 receives a control signal and a clock pulse from the MPU 40 and supplies a drive pulse to the stepping motor 16. As is well known, the stepping motor 16 rotates in proportion to the number of supplied driving pulses, so that the rotation angle can be determined by the number of driving pulses, and the speed of rotation is controlled by the frequency of the driving pulses. can do.

The number of drive pulses supplied from the driver IC 50 to the stepping motor 16 is counted by a counter 51. Then, the MPU 40 monitors the count value of the counter 51, and sends a control signal to the driver IC 50 every time the count value reaches a predetermined value. And the driver IC
Reference numeral 50 changes the frequency and polarity of the drive pulse supplied to the stepping motor 16 in accordance with the control signal, and controls the speed and rotation direction of the stepping motor 16. When one continuous shooting sequence is completed and the shutter plate 10 returns to the origin position, a reset signal is input to the counter 51, and the count value is cleared to “0”.

The photo sensor 18 is connected to the shutter plate 12.
When detecting the reflection piece 19 fixed to the MPU 40, a detection signal is sent to the MPU 40. The MPU 40 monitors the detection signal from the photo sensor 18 and controls the shutter plate 1 as described later.
2 is returned to the origin position accurately. Reference numeral 53
Denotes a driver for driving the film feeding motor 30.

The operation of the continuous shooting camera having the above configuration will be described. When continuously shooting a golf swing of a right-handed person from the top position to the follow-through position at 8 frames / second, the R / L setting knob 46 is set to the index “R”, and the frame number setting knob 44 is set to the index “8”. To match. Thereby, the drive control of the stepping motor 16 is performed so that the shutter plate 12 is rotated counterclockwise in FIG. 1 and continuous shooting is performed at 8 frames / sec.

When the subject starts the backswing and comes to the top position, the shutter button 41 is pressed. As a result, the stepping motor 16 starts driving, and the shutter plates 13 and 14 rotate clockwise in FIG. 1 or FIG.
2, 15 rotate counterclockwise. Then, as the shutter plate 12 rotates counterclockwise from the origin position P ₀ shown in FIG.
6b are sequentially opened and closed, and the continuous shooting screen 24 is displayed on the film 20.
a and 24b are exposed. Immediately after continuous shooting screen 24b is exposed, the shutter plate 13 is located from the home position Q ₀ Q ₁
, And the slit 13b continues to be exposed
The continuous shooting screens 24c and 24d are exposed by opening and closing c and 6d. Immediately after continuous shooting screen 24d is exposed, the shutter plate 14 reaches the home position R ₀ at the position R _1, continuous screen 2 subsequently slit 14b is opened and closed exposure opening 6e, the 6f
4e and 24f are exposed. Immediately after continuous shooting screen 24f is exposed, the position S shutter plate 15 from the home position S _0
1 and the slits 15b continue to expose the exposure apertures 6g and 6g.
h is opened and closed to expose the continuous shooting screens 24g and 24h.

When the shutter plates 12 to 15 rotate 360 ° and return to the origin position, the photo sensor 18
9, the MPU 40 further includes a driver IC
Several driving pulses are supplied to the stepping motor 16 via 50, and then the stepping motor 16 is rotated in the reverse direction, and the stepping motor 16 is stopped when the photo sensor 18 detects the reflection piece 19 again. In this way, by detecting the reflection piece 19 twice with the photo sensor 18 and stopping the stepping motor 16, the shutter plate 12 can be accurately stopped at the origin after one continuous shooting.

When the continuous shooting screens 24a to 24h of eight frames are shot on the film 20, the film feeding mechanism 32 is actuated in response to the shooting completion signal, the motor 30 is driven, and the feeding of the film 20 is started. Be started. Then, when the feed of two frames of 35 mm full size is detected by the encoder 39, the motor 30 is stopped and the apparatus enters a standby state for the next photographing.

As described above, since the continuous shooting screens 24a to 24d and the continuous shooting screens 24e to 24h of the four frames have the same size as the screen size for panorama printing, the panorama printing process is performed. As a result, as shown in FIG. 5, two continuous print photographs 56 and 57 are obtained from the continuous photographing screens 24a to 24h. Therefore, if the print photographs 56 and 57 are connected, a continuous photograph by one continuous photographing is obtained, and each frame is arranged side by side with the passage of time, which is very advantageous in terms of reproducibility of the continuous photographed scene. is there.

In the above-described continuous shooting camera, continuous shooting can be performed by reversing the stepping motor 16. For example, when continuously photographing a golf swing of a left-handed player, the R / L setting knob 46 is set to the index “L” and then the shutter button 41 is pressed. If a left-hand mode signal is input from the R / L mode switching circuit 45 at the time when the release signal is input, the MPU 40 sends a control signal for reverse rotation driving to the driver IC 50, and
50 supplies a driving pulse of the opposite polarity to the stepping motor 16.

When the stepping motor 16 is reversed,
The shutter plates 13 and 14 are moved in the counterclockwise direction.
2, 15 are rotated clockwise, and the continuous shooting screens 24h, 24
The photographing is performed in the order of g, 24f,... 24a. Then, two print photographs 58 and 59 as shown in FIG. 6 are obtained for one continuous photographing. In this way, by arranging the frames in order from the right with the passage of time, it is possible to reproduce a continuous shooting scene that is easy to see in accordance with the direction of the movement of the left-handed player.

When it is desired to continuously capture the state of the exercise performed continuously for about 2 seconds, the photographing is performed by setting the frame number setting knob 44 to the index "4". As a result, a control signal of 4 frames / sec is input from the MPU 40 to the driver IC 50, and the driver IC 50
The rotation speed between the exposures is further reduced while maintaining the rotation speeds of 2 to 15 constant. As a result, eight frames of the continuous shooting screens 24a to 24h are shot in two seconds.

Since the photographing interval can be changed only by adjusting the rotation speed of the stepping motor 16,
In consideration of the fact that the movement speed is slow at the beginning and the end of the movement, for example, after the continuous shooting screen 24a is shot, the continuous shooting screen 24
It is also possible to make an adjustment so that the time interval until the image b is shot and the time interval between the shooting of the continuous shooting screen 24h after the shooting of the continuous shooting screen 24g and the shooting of the continuous shooting screen 24h are lengthened.

Next, in another embodiment of the present invention shown in FIG. 7, the shafts 10 and 11 of the shutter plates 14 and 15 are positioned on the opposite side to the row of the exposure openings 6a to 6h. And a driving gear 1 between the driving gear 17 of the stepping motor 16 and the gear 14a of the shutter plate 14.
7, a gear 61 having the same pitch number as that of the shutter plate 14,
The rotation direction 15 is the same as that of the above embodiment. Thereby, the exposure opening 6d and the exposure opening 6
e can be reduced, and a continuous shooting camera equipped with this continuous shooting shutter device can be made more compact.

In the embodiment described above, the motors for driving the shutter plates are all disposed at the middle of the row of shutter plates, but they may be disposed at the ends of the row of shutter plates. Further, as a material for forming the shutter plate, a sheet-like thin plate used for a normal shutter blade can be used.

[0028]

As described above, according to the shutter device of the present invention, the number of shutter plates that are simultaneously rotated by the drive motor is four, and the film feeding direction is determined by one opening formed in each shutter plate. Arranged linearly along
Exposure was performed by sequentially traversing two adjacent ones of the eight exposure openings. Therefore, the meshing point of the gear
Is increased compared to the case with two shutter plates.
Razz, because the moment of inertia of the shutter plate diameter of the shutter plate per one is reduced may turn small, generally back <br/> crash is reduced, it is possible to equalize the opening and closing times of each exposure opening . Further, since the diameter per shutter plate is reduced, it is possible to contribute to downsizing of the continuous shooting camera. Also, the openings formed in each shutter plate
Easy to make shutter plate because one each
Can be done.

[Brief description of the 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 an explanatory diagram of an operation of the shutter plate according to the embodiment of the present invention.

FIG. 4 is a block diagram schematically showing an electrical configuration of the continuous shooting camera shown in FIG.

FIG. 5 is an explanatory diagram illustrating an example of a print photograph obtained by the continuous shooting camera illustrated in FIG. 1;

FIG. 6 is an explanatory diagram showing an example of a print photograph obtained by the continuous shooting camera shown in FIG. 1;

FIG. 7 is a plan view schematically showing a main part of another embodiment of the present invention.

[Explanation of symbols]

 3a-3h Photographing lens 6a-6h Exposure aperture 7 Shutter substrate 8, 9, 10, 11 Axis 12, 13, 14, 15 Shutter plate 12a, 13a, 14a, 15a Gear 12b, 13b, 14b, 15b Slit 16 Stepping motor 17 Drive gear 20 Film 24a-24h Continuous shooting screen 56,57,58,59 Print photo

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 9/10 G03B 15/16

Claims (1)

(57) [Claims] An eight exposure opening arranged in a straight line along a film feeding direction and a gear at each peripheral end are provided so that they can be rotated at the same time by the rotational driving of a driving gear. Four meshed circular shutter plates, a drive motor for rotating the drive gear, and one for each of the shutter plates, wherein one of the exposure openings is formed by rotation of one of the shutter plates. And a shutter for performing exposure across two adjacent exposure apertures.