JP2000098461A - Film unit with lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the best use of the merit of a film unit with a lens whose structure is simple and which is inexpensive by preventing the occurrence of a red-eye effect with the simple structure. SOLUTION: This film unit with a lens has the simple structure equipped with an exposure mechanism 10 having a release button 4 operated to be depressed and exposing film by depressing the button 4 so that a shutter 38 may be opened, a stroboscopic unit 11 where a stroboscopic light emitting device 3 emits light at least twice by performing the depressing operation of the button 4 once, a light emission control means controlling so that the first light emission of the device 3 may be performed when the shutter 38 is closed and a shutter inhibition means inhibiting the shutter 38 from being opened at the time of the first light emission of the device 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens-equipped film unit capable of preventing a red-eye phenomenon that occurs during photographing with strobe light emission.

[0002]

2. Description of the Related Art In the case of performing color photographing by strobe light emission, a red-eye phenomenon in which a human eye shines red or gold sometimes occurs. This red-eye phenomenon occurs when a flash of strobe light that has passed through the pupil of the eye is reflected by the retina, and the reflected light is reflected on a film. This is because there are many capillaries in the retina of the eye, and the hemoglobin in the blood is red, so that the reflected light is reddish. Therefore, such a red-eye effect can be prevented by reducing the pupil of the eye.

[0003] Japanese Patent Application Laid-Open No. 1-235932 discloses a camera provided with a red-eye prevention control device for preventing the red-eye phenomenon. In this apparatus, a xenon tube for irradiating a subject with light for reducing a human pupil is provided in addition to a xenon tube for performing original illumination at the time of photographing. In addition, a red-eye determining unit that determines whether or not red-eye occurs based on the brightness of the subject is provided, and when it is determined that red-eye occurs, light emission for reducing a human pupil is performed. This light emission makes the pupil smaller,
This is for photographing by emitting light from the illumination of the main body. In the conventional apparatus, these determinations and control are performed by providing a CPU in the camera and controlling the CPU.

[0004]

However, in the conventional apparatus, even in an environment where red eyes do not occur, it is necessary to incorporate many mechanical parts for preventing red eyes into the camera, and the structure of the camera is complicated. It has become. In particular, since a CPU is required to prevent red eyes, it is expensive. Therefore, incorporating the above-described device into a film unit with a lens, which has a simple structure and is supplied for the purpose of being inexpensive and easy to use, loses the original merit of the film unit with a lens, Not practical.

The present invention has been made in view of such a conventional problem, and has a simple structure, is inexpensive, and can be easily used without losing the advantages of a film unit with a lens. It is an object of the present invention to provide a lens-equipped film unit capable of preventing the problem.

[0006]

According to one aspect of the present invention, there is provided an exposure mechanism having a release button which is operated to be depressed, wherein a shutter is opened by depressing the release button to expose the film. A strobe unit that emits at least two times by a strobe light emitting device by a single pressing operation on a release button, and a light emission that controls the first light emission of the strobe light emitting device to be performed when the shutter is closed. And control means.

[0007] Since the light emission control means controls the first light emission of the strobe light emitting device when the shutter is closed, the light does not reach the film in the first light emission and the film is exposed. Absent. Also, the human pupil is reduced by the first light emission. Therefore, the red-eye phenomenon does not occur even if the second light emission is performed after that to take an image.

Therefore, in the present invention, it is only necessary to add only the light emission control means for performing the first light emission of the strobe light emitting device when the shutter is closed, and the structure remains simple, inexpensive and simple. Red-eye can be prevented without losing the merit that can be used.

According to a second aspect of the present invention, there is provided an exposure mechanism having a release button which is operated to be depressed, a shutter being opened by depressing the release button to expose the film, and a strobe light being depressed once by pressing the release button. A strobe unit that emits light at least twice, a light emission control unit that controls the first light emission of the strobe light emitter to be performed when the shutter is closed, and a first light emission of the strobe light emitter Shutter prohibiting means for prohibiting the shutter from opening at times.

According to the present invention, in addition to the structure of claim 1,
Shutter inhibiting means is provided. The shutter prohibiting means operates so as to prohibit the shutter from opening at the time of the first light emission of the strobe light emitter. Therefore, at the time of the first light emission, the shutter is securely closed.
Light never reaches the film. This makes it possible to more reliably prevent the film from being exposed during the first light emission.

[0011]

Also in the present invention, the light emission control means and the shutter prohibition means are simply added.
Red eyes can be prevented without losing the advantage of being inexpensive and easy to use.

According to a third aspect of the present invention, the shutter prohibiting means engages with an operation member of an exposure mechanism that operates to open a shutter and locks the operation of the operation member, and the strobe light emitter is provided for the first time. And a solenoid control unit for disengaging the solenoid after a predetermined time elapses after the first light emission of the strobe light emitter, while the solenoid is engaged with the operating member before the light emission of the strobe light is performed. And

According to the present invention, since the solenoid is engaged with the operating member of the exposure mechanism to lock its operation, it is possible to prevent the shutter from being opened. The solenoid control unit releases the engagement of the solenoid after a lapse of a predetermined time after the first light emission, so that the shutter can be opened at the second light emission and shooting can be performed at the second light emission. In the second light emission, since the pupil is already small, it is possible to prevent the occurrence of red eyes.

According to the present invention, since a mechanically engaged solenoid is used, it is inexpensive and can be controlled easily.

According to a fourth aspect of the present invention, the operating member is a charge lever which rotates between the release button and a shutter lever for opening the shutter and drives the shutter lever. .

In the present invention, the solenoid is engaged with the charge lever, and the rotation of the charge lever is locked by this engagement, so that the opening operation of the shutter is prevented. With the structure in which the solenoid is engaged with the charge lever in this manner, the solenoid can be easily arranged, and the assembling becomes easy.

[0018]

FIG. 2 is a block diagram of an embodiment of the present invention. A release button 4 included in an exposure mechanism described in detail below, and a strobe light emitter 3 included in a strobe unit described in detail later. , A light emission control means 6, a shutter prohibition means 7, and a delay circuit 8.

The strobe light emitter 3 emits light when a release button 4 is pressed, and the light emission is controlled by a light emission control means 6. This control is performed such that the light emission is performed at least twice by one press operation of the release button 4, and the first light emission is performed when a shutter of an exposure mechanism described later is closed.
Further, the light emission control means 6 activates the delay circuit 8 by the first light emission of the strobe light emitter 3.

The delay circuit 8 outputs a signal for driving the shutter prohibiting means 7. The output of the delay circuit 8 is 0.3 to 0.
It is designed to be performed 6 seconds later. The shutter prohibiting means 7 prohibits the shutter from opening as described later.

FIG. 1 is an exploded perspective view of the whole, and includes a unit body 20, a front cover 21 placed on the front side of the unit body 20, and a rear cover (not shown) placed on the rear side of the unit body 20. are doing.

The unit main body 20 is provided with a patrone chamber 22 for accommodating a patrone (not shown) for winding a film and a film roll chamber 24 for accommodating a spool 23 around which the film is wound. A battery chamber 26 is provided outside the film roll chamber 24, and a battery 25 is accommodated in the battery chamber 26. An exposure frame (not shown) is formed between the patrone chamber 22 and the film roll chamber 24 to regulate an exposure range of the film, and a light-shielding frame for cutting unnecessary light is provided in front of the exposure frame. 27
Is attached.

Further, a hoisting knob 5 is mounted on the patrone chamber 22. A fork 5a meshing with the rotation shaft of the patrone is formed on the lower surface of the winding knob 5, and by rotating the winding knob 5, the rotation shaft of the patrone can be rotated. Is performed.

The unit body 20 includes an exposure mechanism 10
And a strobe unit 11 are provided.

The exposure mechanism 10 is provided between the patrone chamber 22 and the film roll chamber 24. Therefore, the first to third shaft portions 28, 29, 30 are provided between them.
Are formed upright. A charge lever 31 for performing shutter charge and a cam stopper 32 for stopping and releasing rotation of a cam 35 described later are coaxially attached to the first shaft portion 28, whereby the charge lever 31 and the cam stopper 32 rotate integrally. It is supposed to.

The second shaft portion 29 is rotatably mounted with a winding stopper 33 for prohibiting and canceling film winding. The hoisting stopper 33 is the tooth 3
3a, and the rotation of the winding knob 5 in the film winding direction (counterclockwise) is prohibited by meshing the teeth 33a with the teeth 5b formed on the outer peripheral surface of the winding knob 5. .

A shutter lever 34 for opening and closing a shutter (sector) 38 is attached to the third shaft portion 30. The shutter lever 34 is urged counterclockwise when viewed from above by a coil spring (not shown), and has a long hole 34a and a drive pin 34b integrally formed. After the shutter lever 34 rotates clockwise around the shaft 30, the drive pin 34 b opens and closes the shutter 38 by being rotated counterclockwise by the above-described coil spring. To open and close, the drive pin 3
4b is a forked notch 38a formed in the shutter 38.
Is inserted into. The clockwise rotation of the shutter lever 34 is performed by rotating the charge lever 31 counterclockwise.

A sprocket chamber 36 into which a sprocket 37 is inserted is provided between the first shaft portion 28 and the third shaft portion 30.
Are formed. The sprocket 37 meshes with perforations formed in the film.
An insertion hole is opened in the upper part of the sprocket chamber 36, and the cam 35 is rotatably supported by inserting the shaft pin 35a into the insertion hole. The shaft pin 35a inserted into the insertion hole is fitted into the center hole 37a of the non-circular sprocket 37, whereby the cam 35 rotates integrally with the sprocket 37. The cam 35 rotates an index plate (not shown).

Although not shown, the charge lever 31 is urged by a charge lever spring to rotate in a direction opposite to the charge direction (counterclockwise). The hoisting stopper 33 is urged by a hoisting stopper spring so as to rotate clockwise, and the urging maintains the meshing state of the teeth 33a with the teeth 5b of the hoisting knob 5.

A solenoid 40 is arranged for such an exposure mechanism 10. The solenoid 40 is a member constituting a part of the shutter prohibiting means 7 (see FIG. 2).
7, the charging lever 31 and the cam stopper 32 are attached to the unit main body 20 so as to be close to the second shaft portion 29 to which the charging lever 31 and the cam stopper 32 are attached. The rod 40a of the solenoid 40 is bent in the direction of the charge lever 31, and is engaged with the side surface of the charge lever 31 from the outside by projecting the rod 40a. In the engaged state of the rod 40a, the rotation of the charge lever 31 is restricted, and the shutter lever 34 following the charge lever 31 cannot move. Therefore,
Shutter 3 opened and closed by shutter lever 34
The shutter 38 remains closed without driving the shutter 8.

The solenoid 40 is driven by a solenoid control unit (not shown). The solenoid control unit drives the solenoid 40 before the strobe light emitter 3 emits light for the first time. This makes the strobe light emitter 3
During the first light emission, the shutter 38 does not open. Further, the solenoid control unit stops driving the solenoid 40 after a lapse of a predetermined time such as 0.3 to 0.6 seconds after the first light emission of the strobe light emitter 3. Thereby, the solenoid 40 is released from the engagement with the charge lever 31, and the shutter 38 can be opened. With the opening operation of the shutter 38, the strobe light emitter 3 emits light for the second time.

The shutter 38 is rotatably mounted on a shutter mounting plate 41 in front of the light shielding frame 27. The shutter 38 is arranged so as to cover the aperture 42 provided in the shutter mounting plate 41, and maintains the state of covering the aperture 42 by a shutter spring (not shown). This prevents inadvertent exposure of the film.

The taking lens 1 for exposing a film is mounted on a lens mount 43 provided in front of a shutter mounting plate 41 having an aperture.

The strobe unit 11 includes a wiring board 44 on which a pattern is formed, a strobe light emitter 3 mounted so as to project light from the front side of the wiring board 44, a capacitor 19 for supplying power to the strobe light emitter 3, 15 and
And a strobe switch 16.

The strobe light emitter 3 exits through the light emitting window 45 formed in the front cover 21 and is exposed on the front surface of the front cover 21. The capacitors 19 and 15 are connected to the battery 26 via the wiring board 44 and charged.

The condensers 19 and 15 are connected to the strobe light emitter 3
In this embodiment, two capacitors are provided so that the strobe light emitter 3 emits light twice when the release button 4 is pressed once. Among them, the first capacitor 19 is charged with electric power for performing the first light emission of the strobe light emitting device 3, and
The second capacitor 15 is charged with electric power for performing the second light emission of the strobe light emitter 3.

As will be described later, the first light emission of the strobe light emitting device 3 is a pre-light emission for preventing red-eye, and since a smaller illuminance is required as compared with the main light emission for exposure,
A small capacitor can be used as the first capacitor 19 that supplies the power. Therefore, even if the two condensers 19 and 15 are provided, the size of the film unit with the lens does not increase. Further, since there is no need to provide two xenon tubes that emit light as in the related art, the number of parts can be reduced, the structure is simple, and the advantages of a lens-fitted film unit provided at low cost are not lost.

The strobe switch 16 is slidably mounted on the front portion of the front cover 21 and is turned on when slid to the side to instruct the capacitors 19 and 15 to charge. When the strobe switch 16 is turned on, the solenoid 40 of the shutter inhibiting means 7 is driven.

Although not shown, the wiring board 44 includes a light emission control means 6, a delay circuit 8, and a solenoid control unit connected to the delay circuit 8 for controlling the operation of the solenoid 40, as shown in FIG. Is provided.

The front cover 21 is put on the front surface of the unit main body 20 so as to sandwich the strobe unit 11 between the front cover 21 and the unit main body 20. The release button 4 is provided on the upper surface of the front cover 21 so as to be able to be pressed. A switch (not shown) for detecting that the release button 4 has been pressed is provided below the release button 4.

FIG. 3 shows a power supply circuit for the strobe light emitter 3, in which a first capacitor 19 and a second capacitor 15 are connected in parallel, and a switch 17 is inserted between them. Therefore, when the switch 17 is open, the strobe light emitter 3 pre-emits light by the first capacitor 19, and when the switch 17 is subsequently closed, the second capacitor 15 emits main light. This switch 17
Is performed by a signal from the delay circuit 8.

FIG. 4 is a flowchart showing the operation in this embodiment, and FIG. 5 is a timing chart thereof.

By sliding the strobe switch 16 to turn it on (step S1), the shutter is prohibited (step S2). When the release button 4 is pressed in this state (step S3), the solenoid 40 is driven to engage the charge lever 31, as shown in FIG. 6, so that the opening operation of the shutter 38 is prohibited.

The light emission control means 6 performs the first light emission of the strobe light emitter 3 by pressing the release button 4 (steps S4 and S5). At this time, the opening operation of the shutter 38 is prohibited, and the shutter 38 is in a closed state. Therefore, the film is not exposed. The first light emission is pre-emission, and the pre-emission starts at 0.
The pupil of the subject shrinks after 3 to 0.6 seconds.

The first light emission activates the delay circuit 8 (step S6). The delay circuit 8 waits for a predetermined time (0.3 to 0.6 seconds) from the first light emission (Step S).
7), the shutter prohibition by the shutter prohibition means is released (step S8). The release of the prohibition is performed when the solenoid 40 is released from the engagement with the charge lever 31 as shown in FIG. As a result, the charge lever 31 rotates, so that the shutter lever 34 is driven to open the shutter 38, and the film is exposed (step S9).

As described above, in this embodiment, the strobe light emitter 3 emits light for the first time in the shutter prohibition state, and after a lapse of a predetermined time, the shutter 38 opens and the strobe light emitter 3 The second flash is performed,
Exposure ends when the shutter is closed.

Therefore, when the film is exposed, the human pupil is small, so that red eyes do not occur.

Thereafter, the shutter is charged by winding the film, and the delay circuit 8 is reset by the completion of the shutter charge.
The solenoid also returns to the initial state.

As described above, in this embodiment, light emission control of the strobe light emitter 3 can be performed without using a CPU and with a small number of additional components. For this reason, it is possible to prevent red-eye without losing the merits of a film unit with a lens which has a simple structure, is inexpensive and can be used easily.

In the above embodiment, the strobe light emitting device 3 always emits light twice when the release button 4 is pressed. However, if it is clear that red-eye does not occur, the light emission is stopped once. It is possible to This can be achieved by switching the slide of the strobe switch 16 to three stages of “turn off strobe light emission”, “turn on strobe light emission”, and “pre-flash light emission”.

Although the solenoid 40 for inhibiting the opening operation of the shutter 38 is engaged with the charge lever 31, it may be engaged with another member of the exposure mechanism such as the winding stopper 33.

[0052]

According to the first aspect of the present invention, there are few additional members for preventing the red-eye effect, the structure is simple, the cost is low, and the advantages of the lens-equipped film unit which can be used easily can be lost. Absent.

According to the second aspect of the present invention, the exposure of the film at the time of the first light emission can be reliably prevented, and the structure is simple, inexpensive and easy to use without losing the advantages. , Can prevent red eyes.

According to the third aspect of the present invention, since a mechanically engaged solenoid is used as a member for prohibiting the shutter, it is inexpensive and its control can be easily performed.

According to the fourth aspect of the present invention, the solenoid can be easily arranged, and the assembling becomes easy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a block diagram of one embodiment.

FIG. 3 is a circuit diagram for causing a strobe light emitter to emit light.

FIG. 4 is a flowchart of an operation.

FIG. 5 is an operation timing chart.

FIG. 6 is a perspective view of a shutter prohibited state.

FIG. 7 is a perspective view of a shutter prohibition release state.

[Explanation of symbols]

 Reference Signs List 3 Strobe light emitter 4 Release button 6 Light emission control means 7 Shutter prohibition means 10 Exposure mechanism 31 Charge lever 38 Shutter 40 Solenoid

Claims (4)

[Claims] An exposure mechanism that has a release button that is pressed and that exposes a film by opening a shutter when the release button is pressed; and a strobe light emitting device that has at least two strobe light emitters when the release button is pressed once. A film unit with a lens, comprising: a strobe unit that emits light once; and a light emission control unit that controls the first light emission of the strobe light emitter to be performed when the shutter is closed. 2. An exposure mechanism having a release button which is operated to be depressed, wherein a shutter is opened when the release button is depressed to expose the film, and at least two strobe light emitters are depressed by one depressing operation of the release button. A flash unit that emits light twice, a light emission control unit that controls the first light emission of the strobe light emitter to be performed when the shutter is closed, and a shutter that opens at the time of the first light emission of the strobe light emitter. And a shutter prohibiting unit for prohibiting the lens unit. 3. The shutter prohibiting means includes a solenoid that engages with an operation member of an exposure mechanism that operates to open a shutter and locks the operation of the operation member, and before the strobe light emitter emits light for the first time. The solenoid is engaged with the operating member and the
3. The lens-equipped film unit according to claim 2, further comprising: a solenoid control unit that releases the engagement of the solenoid after a lapse of a predetermined time after the second light emission. 4. The charge lever according to claim 3, wherein the actuating member is a charge lever that rotates between the release button and a shutter lever that opens the shutter and drives the shutter lever. Film unit with lens.