JPH06222419A - Shutter device for consecutive photographing - Google Patents

Abstract

PURPOSE:To start and stop a shutter device for consecutive photographing by a simple mechanism. CONSTITUTION:A release button is depressed by a photographer, and then, a release lever 21 is rotated clockwise and a catch 21a is detached from a pin 22 planted on a rotor 11, the rotors 11 and 12 are rotated by a spring unit 16 so as to start consecutive photographing. When the photographer keeps depressing the release button even after consecutive photographing, the catch 21b coming into the moving track of the pin 22 is made to abut on the pin 22 so as to stop the rotation of the rotors 11 and 12, and then, the operation of the shutter device is stopped. Thereafter, when the release button is released from being depressed, the release lever 21 is rotated counterclockwise by the restoring force of a spring 24, the pin 22 is disengaged from the catch 21b, and the rotor 11 is slightly rotated and the pin 22 is made to abut on the catch 21a, and then, the next photographing standby state is attained. In the case of releasing the release button from being depressed just after the release button is depressed, or on the way of consecutive photographing, the release lever 21 returns to the home position by the restoring force of the spring 24, and the catch 21a is made to abut on the pin 22 after consecutive photographing, and the next photographing standby state is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device for continuous shooting, which is capable of shooting a plurality of times at short intervals by one release operation.

[0002]

2. Description of the Related Art When a moving subject is sequentially photographed with a time lag, it is possible to obtain a photographic image in which the movement stops each time the photograph is taken. Therefore, for example, in sports or the like, the form at each moment can be observed as a still image, which is very convenient. With this background, for example, “continuous shooting cardia“ Bune ”” (trade name) is sold by the applicant. This continuous shooting camera has eight exposure apertures so that eight continuous shooting screens can be shot for two panoramic screens. Two shutters of a rotary type can be operated by one release operation. Board 1
The slits formed on the shutter plate are rotated so as to sequentially cross the eight exposure openings, so that a time-shifted continuous shooting screen of eight frames is photographed.

Since this continuous shooting camera has a structure in which two shutter plates are driven by a stepping motor, the shutter plates are rotated at a high speed at the moment of shooting, and the shutter plates are moved between shootings. Is rotating slowly. Therefore, even a moving subject can be photographed in a substantially still state, and moreover, 8 frames can be continuously shot within a time of about 1 to 2 seconds.

As described above, the continuous shooting camera using the stepping motor has the advantage that the shooting interval and shutter speed at the time of continuous shooting can be freely set, but the stepping motor, the power battery, the microcomputer, and various control circuits are also provided. It becomes indispensable to build in the camera, the manufacturing cost becomes high, and the camera itself tends to be large.

On the other hand, as a low-cost continuous shooting camera that does not use electric parts such as a motor, one rotor having an exposure window is rotated by the urging force of a spring, and four frames are continuously shot during one rotation. It is known to do so. In this camera, the spring is charged by film winding, and the rotor is rotated once by the restoring force of the spring by shutter release.

In such a series of continuous shooting while the rotor makes one rotation, the rotor is rotated exactly once by one shutter release operation, and the rotor is moved for the next continuous shooting. Must be held in position.
For such position control, it is structurally simple to share a member for holding the rotor at the initial position and a member for stopping the rotation of the rotor when it makes one full rotation. .

[0007]

However, since the member for holding the rotor in the initial position is configured to release the holding of the rotor when the shutter button is pressed, the rotor is rotated once before it is rotated once. The rotor cannot be stopped at an appropriate position unless the shutter button is reliably released. The operation of pressing and releasing the shutter button varies depending on the photographer, and in reality, the rotor often makes one rotation while the shutter button is being pressed. Therefore, it is very difficult to share the member for holding the rotor at the initial position with the member for stopping the rotation of the rotor as described above, and in reality, it is unavoidable to use these as separate members. .

The present invention has been made in view of the above background, and in performing a series of continuous photographing by rotating the rotor once, the rotor is configured by using a common release member without complicating the structure. An object of the present invention is to provide a shutter device that is properly held in the initial position and that stops the rotor at a predetermined position after shooting.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and by displacing the release member, the rotor having the photographing window is rotated once by the biasing force of the spring, and during this period. In a shutter device for continuous shooting in which a plurality of exposure apertures are sequentially selected one by one to perform shooting, a pin implanted in the rotor is received, and the rotor is initialized against the bias of the spring. Immediately before the rotor makes one rotation, the first locking piece that locks in the position and the first locking piece moves into the movement locus of the pin when the first locking piece moves to the position where the engagement with the pin is released. In the release member, a second locking piece that receives the pin and locks the rotation of the rotor is integrally provided.

[0010]

FIG. 2 is an external view of a continuous shooting camera using the present invention.
In the front of the camera body 50, four photographing lenses 1a to 1d are horizontally arranged and attached. The photographing lenses 1a to 1d are integrally formed on one lens plate 1, and the optical axes 4a to 4d are parallel to each other. In the camera body 50, an individual aperture is provided for each shooting lens so as to divide the panoramic shooting screen into four, and shooting is performed independently. Therefore, as shown in FIG. Frame shooting screen 5a
~ 5d is obtained.

As shown in FIG. 1, the exposure aperture plate 2 is fixed inside the camera body 50. Exposure aperture plate 2
Has four exposure openings 2a to 2d corresponding to the photographing lenses 1a to 1d and having the same inner diameter. Behind the exposure aperture plate 2 is provided one horizontally long shutter plate 3 which is slidable in the horizontal direction by engagement with a guide pin 29. The shutter plate 3 has an exposure aperture 2a. Slits 3a to 3d are formed corresponding to .about.2d, and when the shutter plate 3 slides, the slits 3a to 3d cross the back of the corresponding exposure openings 2a to 2d all at once.

Behind the shutter plate 3 are two rotors 1
1, 12 are provided. The rotors 11 and 12 are rotatably attached to a shutter base (not shown), and mesh with each other at a rotation ratio of 1: 1 by gears formed on their outer circumferences. The rotors 11 and 12 have opening windows 11a,
12a is formed. Then, while the rotors 11 and 12 make one revolution, the opening window 11a first opens the exposure opening 2a,
2b is successively passed behind, and the opening window 12a is successively passed through the exposure openings 2c and 2d. As a result, the photographing optical axes 4a to 4d determined by the photographing lenses 1a to 1d and the exposure openings 2a to 2d are sequentially selected one by one by rotating the rotors 11 and 12 once.

A mainspring unit 16 is used as a drive source for rotating the rotors 11, 12. The mainspring unit 16 incorporates a spirally wound leaf spring therein, and outputs the restoring force as a rotational force of the gear 17 in the clockwise direction. The gear 17 meshes with one rotor 12, so that the rotors 11 and 12 are connected to the mainspring unit 1.
Driven by 6. In addition, this mainspring unit 1
No. 6 is stored so that one film can be photographed by one full charge, and it is not necessary to charge every filming.

A gear 13 is further meshed with the rotor 12. The gear 13 meshes with the gear 14 which is integral with the cam 15, and therefore when the rotor 12 rotates counterclockwise, the cam 15 also rotates counterclockwise. The rotation ratio between the rotor 12 and the cam 15 is 1: 2, and the cam 15 rotates twice while the rotor 12 rotates once. A pin 25b planted at one end of the shutter lever 25 is in contact with the cam 15.
The shutter lever 25 is rotatable about a shaft 25c,
It is urged clockwise by a spring 26. Further, a pin 25a planted at the other end of the shutter lever 25 is engaged with a slot 3e of the shutter plate 3.

As shown in the drawing, the cam 15 is composed of a spiral cam surface 15a and a step portion 15b.
When 5 rotates counterclockwise, the shutter lever 25 is rotated counterclockwise while pressing the cam surface 15a to store the spring 26, and at the moment the step portion 15b moves, the shutter lever 25 rapidly urges it. Turn clockwise. As a result, the shutter plate 3 slowly moves rightward in synchronization with the rotation of the cam 15 and then rapidly moves leftward.

A release lever 21 is used to hold the rotors 11 and 12 in their initial positions and to start them by a shutter release operation. At one end of the release lever 21, there are two locking pieces 21 arranged in a stepwise manner.
a and 21b are provided, and the pin 22 fixed to the rotor 11 is provided.
Engages with these locking pieces 21a, 21b. The release lever 21 is biased counterclockwise by a spring 24 and is rotatable between the stoppers 23. Then, from the state shown in the figure, the release lever 21
When is pressed down and rotated counterclockwise, the locking piece 21a is disengaged from the pin 22, and the rotors 11 and 12 are simultaneously started to perform a shutter operation.

When the operation of the release lever 21 is released after the rotors 11 and 12 are started, the pin 22 moves to the position shown in the drawing again when the rotor 12 makes one full rotation, and the pin 22 abuts on the locking piece 21a. The rotation stoppers 11 and 12 are stopped. Also, after the rotors 11 and 12 are started,
When the release lever 21 is kept pressed, the locking piece 21b has entered the movement path of the pin 22, so the pin 22 abuts on the locking piece 21b immediately before the rotor 12 makes one rotation, and the rotation is stopped. Is done. When the release lever 21 is released, the rotor 12 rotates slightly and stops at the position where the pin 22 contacts the locking piece 21a. The release lever 21 is rotated counterclockwise by pressing the release button 52 shown in FIG. 2, and the release lever 2 is released by releasing the press.
The pressure of 1 is released.

The operation of the shutter device will be described below. FIG. 3 shows opening windows 11a and 12a and slits 3a to 3d as the rotors 11 and 12 and the shutter plate 3 move.
Represents the phase change of. If the release button 52 is pressed at time T = t0 in FIG.
The first pin 22 passes through the stepped gap formed between the locking piece 21a and the locking piece 21b, and the rotor 11 is unlocked. As a result, the rotor 1 in the initial position shown in FIG.
As shown in FIG. 5, 1 and 12 start to rotate clockwise and counterclockwise, respectively, by the urging force from the mainspring unit 16. Also, in conjunction with this, the cam 15 rotates counterclockwise.

As shown in FIG. 6, the pin 25b has a cam surface 15
By pressing a, the shutter lever 25 is rotated counterclockwise while the spring 26 is being charged. The pin 25a engaged with the slot 3e slowly moves the shutter plate 3 to the right to start shutter charging. Almost at the same time that the opening window 11a overlapped with the exposure opening 2a, the shutter charge was completed, the shutter plate 3 stopped moving to the right, and the pin 25b suddenly dropped the stepped portion 15b by the bias of the spring 26. , The shutter plate 3 is moved leftward at high speed.

As a result, when T = t2, the slit 3a overlaps the exposure opening 2a and the opening window 11a as shown in FIG. 7, and passes through as shown in FIG. Then, the film 5 is exposed by the light flux that has passed through the lens 1a while the exposure opening 2a, the opening window 11a, and the slit 3a are overlapped with each other to obtain a photographic screen 5a. When the shutter is charged, at T = t1, the slits 3a to 3d cross the corresponding exposure openings 2a to 2d from left to right. However, at this time, the opening windows 11a and 12a are exposed to the exposure opening 2a.
The film 5 is not exposed because it is not at the position of 2d. Further, at T = t2, since the exposure openings 2b to 2d and the corresponding opening windows do not overlap, the slit 3
The film 5 is not exposed even when b to 3d cross behind the exposure openings 2b to 2d.

As shown in FIG. 9, the pin 25b has a step surface 1
5b is dropped and brought into contact with the cam surface 15a. At this point, the shutter plate 3 has finished traveling to the left, the rotors 11 and 12 continue to rotate, and as the cam 15 rotates, the pin 25b is pressed against the cam surface 15a to rotate the lever 25 clockwise. Then, the shutter plate 3 is moved to the right and the shutter charge is started again.

Thereafter, similarly, the shutter plate 3 is shutter-charged, and the rotors 11 and 12 continue to rotate to open the window 11a.
Is the exposure opening 2b, and the opening window 12a is the exposure opening 2c, 2d.
And the slits 3b while overlapping.
Each lens 1b at T = t4, t6, t8 through which ~ 3d passes
Exposure is performed through .about.1d to obtain photographing screens 5b to 5d.

Since the rotation speed of the rotors 11 and 12 is kept constant by the mainspring unit 16 while shooting four frames, the continuous shooting interval (t1) of the shooting screens 5a to 5d.
To t4, intervals t4 to t6, and intervals t6 to t8) are constant. Further, since the shutter plate 3 is shutter-charged for each photographing and is moved at a constant high speed, the photographing screens 5a to 5d having appropriate and constant exposure levels can be obtained.

In this way, the film 5 has a four-frame shooting screen 5
When the photographing of a to 5d is completed, the pin 22 comes into contact with the locking piece 21a (state of FIG. 4) at T = t9, the photographing operation is stopped, and the next photographing standby state is set. Further, when the release lever 21 remains pressed as shown in FIG. 10, the pin 22 engages with the locking piece 21 as shown by the broken line in FIG.
It abuts against b and locks the rotors 11 and 12, and the photographing operation is stopped. After that, when the pressure is released, the release lever 21 is rotated counterclockwise by the urging force of the spring 24, the locking piece 21b is disengaged from the pin 22, and the rotor 11 is slightly rotated to engage the pin 22. The state of FIG. 4 is brought into contact with the stop piece 21a, and the next photographing standby state is set.

When the film 5 photographed as described above is subjected to a developing process and a printing process, a print in which four frames are arranged in a horizontal row in chronological order is obtained. In this print, since the shutter charge is performed once for each shooting, the same slide speed of the shutter plate 3 is obtained every shooting screens 5a to 5d, and constant exposure is performed, so the print is performed in the first half and the second half. But there is no difference in exposure. Further, since the mainspring unit 16 has the driving energy for one film, the continuous shooting intervals can be obtained at equal intervals. Furthermore, since the continuous shooting interval is long and the shutter speed is sufficiently high, it is possible to perform continuous shooting at an appropriate timing while still stopping the movement of the subject.

In the above-described embodiment, the embodiment in which the four frames are continuously shot side by side on the panoramic shooting screen has been described. However, the number of exposure apertures is increased, and the number and arrangement of rotors, and further, correspondingly, are increased. By determining the number of aperture windows to be formed on the rotor, continuous shooting of 5 or more frames on the panoramic shooting screen, or continuous shooting of multiple frames on the upper and lower two stages of a 35 mm full size screen can be performed. Is also possible. The exposure interval can be changed by changing the transmission gear train of the mainspring unit 16 or the speed control mechanism. Also,
The shutter speed can be determined by adjusting the widths of the slits 3a to 3d, and can also be adjusted by adjusting the arm length from the rotation center axis of the lever 25 to both ends.

[0027]

As described above, according to the shutter device for continuous shooting of the present invention, the release member operated at the time of shutter release is integrally provided with the first and second locking pieces, and is rotated by the shutter release. When the rotor has made almost one rotation, the first locking piece receives the pin implanted in the rotor when the operation of the release member is released,
Further, when the release member is still operated, the second locking piece receives the pin to stop the rotation of the rotor. Therefore, the common release member is used without complicating the structure. It is possible to correctly hold the rotor at the initial position and stop the rotor at a predetermined position after photographing.

[Brief description of drawings]

FIG. 1 is a schematic view of a continuous shooting shutter device using the present invention.

FIG. 2 is an external view of a continuous shooting camera embodying the present invention.

FIG. 3 is an operation explanatory diagram of the continuous shooting shutter device of the present invention.

FIG. 4 is an operation explanatory view of the shutter device of the present invention in an initial position.

FIG. 5 is an operation explanatory view of the shutter device of the present invention immediately after shutter release.

FIG. 6 is an operation explanatory view of the shutter device of the present invention immediately before the shutter plate moves at a high speed.

FIG. 7 is an operation explanatory view of the shutter device of the present invention showing a state during the first continuous shooting frame exposure.

FIG. 8 is an operation explanatory view of the shutter device of the present invention showing a state immediately after the exposure of the first continuous shooting frame is completed.

FIG. 9 is an operation explanatory view of the shutter device of the present invention showing a state where high-speed movement of the shutter plate is completed.

FIG. 10 is an operation explanatory view of the shutter device of the present invention showing a state in which the rotor makes almost one rotation while the release lever is being pressed.

[Explanation of symbols]

 11, 12 Rotor 21 Release lever 21a, 21b Locking piece 22 Pin 24 Spring

Claims (1)

[Claims] 1. A displacement member is operated to rotate a rotor having a photographing window by a biasing force of a spring so that photographing is performed while sequentially selecting a plurality of exposure openings one by one. In the continuous shutter device described above, a first locking piece that receives a pin implanted in the rotor and locks the rotor at an initial position against the bias of the spring, and the first locking piece. When the piece moves to a position where the engagement with the pin is released, the piece enters the movement locus of the pin,
A shutter device for continuous shooting, wherein a second locking piece that receives the pin and locks the rotation of the rotor immediately before the rotor makes one rotation is integrally provided on the release member.