JPH04194831A - Instant camera - Google Patents

Abstract

PURPOSE:To further reduce the size and the thickness of a body part and to sharply improve portable properties by arranging a stroboscope device and a shutter release mechanism to the front side by which a discharge passage for a film unit is nipped, and a motor for driving a developing roller and a main capacitor for stroboscope to the back side. CONSTITUTION:When photographing is completed, a motor 24 is run to rotate developing rollers 13 and 13, and a claw is operated to scrape out an exposed film unit 11. In following, the unit 11 is discharged by means of a pair of rollers 13 and simultaneously developing treatment liquid is developed. When the roller 13 is rotated by a specified amount and the rear end of the unit 11 is delivered out from the roller 13, the motor 24 is stopped. In which case, the unit 11 is taken out, and when a proper time elapses, a photographing picture comes out. Since a relatively large unit is arranged in a state to nip a passage through which the unit 11 is discharged, the body part of a camera is formed in a compact shape and reduced in thickness.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an instant camera using a mono-sheet type instant film unit.

[Conventional technology]

An instant camera that uses a mono-sheet type instant film unit has a structure in which the exposed film unit is scraped out of the film pack by a claw, and then ejected from the camera body while a pair of developing rollers spreads the developing solution. There is. For this reason, the camera body must be equipped with a pair of developing rollers whose length is longer than the width of the film unit, and in order to reliably drive the developing rollers, a high-torque motor or the driving force of the motor must be used to reliably drive the developing rollers. A gear mechanism is required to transmit the information to the claw or unfolding roller. In addition, the screen size of the film unit is larger than that of regular 135 film, so in order to be able to take pictures at a standard angle of view, the focal length of the photographic lens must be longer, and the thickness of the camera body must also be increased. As the number of cameras increases, the camera body tends to become larger. Against this background, the camera body of an instant camera has traditionally been divided into a main body that houses the unfolding roller and its drive mechanism, and a lens board that incorporates the photographic lens, shutter, etc. The camera body can be folded to make it more compact when not in use.

[Problem to be solved by the invention]

However, in addition to the drive mechanisms such as the above-described unfolding roller and motor, an instant camera must also incorporate a finder, a strobe device, a main capacitor for the strobe, and a power source battery. Moreover, conventionally,
Because the viewfinder and strobe device are located in the main body so that they do not overlap with the film unit ejection path when viewed from the front, the main body itself is large in shape and thickness, and is compact enough even when the lens board is folded. It is hard to say that it has been standardized.

[Purpose of the invention]

The present invention has been made in consideration of the above background, and the main body part containing the developing roller etc. is further miniaturized. The purpose of the present invention is to provide an instant camera that is thin and has greatly improved portability.

[Means to solve the problem]

In order to achieve the above object, the present invention disposes a flash device and a shirt release mechanism on the front side across the ejection path of the film unit after the unfolding roller built into the main body of the camera, and also disposes the shutter release mechanism on the back side. This configuration includes a roller drive motor and a strobe main capacitor. Further, a finder objective lens is disposed on the front side across the film unit ejection path, and a finder eyepiece is disposed on the rear side, and the film unit is ejected through between these lenses.

[Effect]

Since each relatively large component is arranged to sandwich the film unit discharge path in the front and rear, it is possible to reduce the width of the camera body when viewed from the front. Furthermore, when the finder objective lens and the finder eyepiece are arranged to sandwich the ejection path, the film unit passes across the finder optical system when ejecting the film unit, but at that point, the finder objective lens and the finder eyepiece Since it is never used, no inconvenience occurs. Hereinafter, the present invention will be explained according to the illustrated embodiments.

【Example】

In FIGS. 1 and 2 showing an instant camera using the present invention, the camera body of this instant camera is composed of a main body 2 and a lens board 3. As shown in FIG. A loading lid that can be opened and closed is provided on the back side of the main body 2, and by opening the loading lid, a film bank (not shown) can be taken in and taken out. The lens board 3 is rotatably attached to the main body 2 by a shaft 4, and when not in use, the lens board 3 is attached to the main body 2 as shown in FIG.
It can be folded to cover the front of the When the lens board 3 is erected, as shown in FIG. The lens board 3 is held in an upright position. Note that the reference numeral 5a indicates a pin provided at the lower end of the main body 2, and the reference numeral 5b engages with the pin 5a to secure the lens stay 5.
It shows a guide groove that guides the movement of. The lens board 3 has a built-in photographic lens 6 and a shutter device (not shown), and is also provided with a battery chamber 7. The battery compartment 7 contains a battery 8 made of lithium batteries.
is stored and covered with the battery cover 9. Note that the main body portion 2 and the Renspode 3 are connected via a bellows 10. An exposed film unit 11 is mounted on the top surface of the main body 2.
A discharge port 12 is formed for discharging the material to the outside, and a pair of developing rollers 13, 13 are provided behind the discharge port 12. The developing rollers 13, 13 send out the exposed film unit 11 scraped out by a claw built in the main body 2 from the discharge port 12, and also send out the developing processing liquid provided on the front end side of the film unit 11. The developing solution is developed by crushing the bot. The upper front surface of the main body 2 has a release button 15° and a strobe light emitting window 16. A finder window 17 is provided. Then, as shown in FIG. 1, the release button 15. Strobe light emitting window 16. Behind each of the viewfinder windows 17 is a release detection circuit 19 that electrically detects the pressing operation of the release button 15. Strobe light emitter 20. A finder objective lens 21 is provided. Each of these parts is located above the spreading roller 13.13. Note that the reference numeral 22 indicates a strobe circuit board. A motor 24 for driving the unfolding roller 13 is provided on the upper rear side of the main body 2 . Main capacitor for strobe light emission 25. A finder eyepiece 26 is built in, and these are located above the unfolding roller 13. and,
The finder eyepiece 26 and the finder objective lens 21 constitute a finder optical system, and the film unit 11 is ejected across the finder optical system. Moreover, the motor 24. Main capacitor 25
The film unit 11 is partially located above the developing roller 13.As shown in FIG. When the film unit 11 is ejected, the tip of the film unit 11 will not hit the motor 24 or other parts.Of course, at the part facing the finder objective lens 21 and the finder eyepiece 26, the partition plate 2
7.27 is partially cut out so as not to obstruct the viewfinder field of view. A drive gear 28 is fixed to the shaft of the motor 24, and the driving force of the motor 24 is transmitted to the developing rollers 13, 1 via a transmission mechanism 30.
3. Note that this transmission mechanism 30 also incorporates a claw drive mechanism for operating the claw described above. FIG. 4 shows a part of the transmission mechanism 30, in which the drive gear 28
The driving force is transmitted to the unfolding roller 13 via a planetary gear mechanism. When the motor 24 is driven to eject the film unit 11, the rotation of the drive gear 28 causes the gear 32, which is integrated with a small diameter gear 32a, to rotate clockwise. The small-diameter gear 32a is rotated by three planetary gears 35 supported by a three-pronged shaft 33.
These are rotated counterclockwise via a small diameter gear portion (two-stage gear structure). The small diameter gear portion of the planetary gear 35 meshes with the inner gear 36 fixed to the camera body, so when the planetary gear 35 rotates counterclockwise, the planetary gear 3
5 rolls clockwise within the inner gear 36 to perform planetary motion. Since the large diameter gear portion of the planetary gear 35 meshes with the inner gear portion 37a of the interlocking gear 37, when the planetary gear 35 makes a planetary motion in the clockwise direction, the interlocking gear 37 rotates counterclockwise. The rotation of the interlocking gear 37 in the counterclockwise direction is caused by the rotation of the outer peripheral gear part 3.
7b to rotate the gear 38 clockwise. A roller gear 39 is integrated with the gear 38, and a gear 40 meshes with the roller gear 39. These roller gears 39, 40 have protrusions 39a. 40a is fixed, and these protrusions 39a, 40a form grooves 13a, respectively, at the ends of the unfolding roller 13.13.
It meshes with 13a. Therefore, as the gear 38 rotates clockwise, the developing rollers 13, 13 rotate in the direction in which the film unit 11 is ejected. By using such a planetary gear mechanism, the rotation of the motor 24 can be controlled by the unfolding rollers 13, 13 in a small space.
This is advantageous in making the camera body more compact. The effect of the above configuration will be explained. As shown in FIG. 2, by folding the lens board 3 so as to cover the front surface of the main body 2 when not in use, the entire camera body can be made thin and compact. In particular, regarding the width, in addition to the width of the film unit 11, the transmission mechanism 3 consisting of a gear train and a clutch
Only 0 is added. Regarding the thickness of the main body 2, there is a strobe light emitter 20, which is a large component, located above the developing roller 13 and away from the film back. Motor 24. Since the main capacitor 25 and the like are arranged, and the battery 8 is built into the lens holder 3 instead of the main body 2, it is considerably thinner than the conventional one. When in use, the lens board 3 is erected as shown in FIG. 1, and framing is performed through the finder optical system. In this state, there is nothing that obstructs the field of vision between the finder objective lens 21 and the finder eyepiece 26 above the developing roller 13°13. When the release button 15 is pressed, a photograph is taken, and the motor 24 is driven by the photographing completion signal to eject the film unit 11. When the motor 24 is driven, the transmission mechanism 30 including the planetary gear mechanism shown in FIG.
starts rotating, and the claw operates to scrape out the exposed film unit 11 from the film pack. Then, the tip of the film unit 11 is connected to the developing roller 1.
After entering between 3 and 13, a pair of unfolding rollers 1
3, the film unit 11 is discharged, and at the same time, the developing solution is developed. In order to spread the developing solution, the film unit 11 must be fed out while being pressurized by the developing rollers 13, 13, and high torque is required for its rotation. By utilizing the gear mechanism, it becomes possible to transmit high torque driving force from the motor 24 to the spreading roller 13 with a small installation space. The film unit 11 emerging from between the developing rollers 13.13 is guided by the partition plate 27.27 and is discharged from the discharge port 12. In the process of discharging the film unit 11, the film unit 11 is removed. The film unit 11 enters between the finder objective lens 21 and the finder eyepiece 26, and the viewfinder field of view is obstructed, but this does not pose any problem since photography cannot be performed while the film unit 11 is being ejected. The developing roller 13 rotates a certain amount, and the film unit 11
When the rear end is sent out from the unfolding roller 13, the motor 24
stops. Then, the film unit 11 protruding from the discharge port 12 is taken out, and a photographic image appears on the film unit 11 after a suitable period of time has elapsed. Although the present invention has been described above in accordance with the illustrated embodiments, the present invention is not limited to the above-described embodiments. You can also do this. Further, the discharge port 6 may be provided on the side surface of the main body portion 2 to form a horizontal camera body, and the folding mechanism of the lens board 3 may also be modified in various ways.

【Effect of the invention】

As described above, according to the instant camera of the present invention, the flash device and the shutter release mechanism are arranged on the front side so as to sandwich the passage through which the exposed film unit is discharged, and the developing roller drive mechanism is arranged on the back side. Since the motor and strobe main capacitor are arranged, the main body of the camera can be made compact and thin. By arranging the objective lens and eyepiece that constitute the finder optical system so as to sandwich the passage, the camera body can be made more compact, and the portability of the instant camera can be greatly improved. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the instant camera of the present invention in use. FIG. 2 is a perspective view showing the instant camera of the present invention in a folded state. FIG. 3 is a sectional view of essential parts of the instant camera of the present invention. The fourth part is a perspective view showing a part of the transmission mechanism used in the instant camera of the present invention. 2...Main unit 3...Lens board 8...Hunter 11...Film unit 13...Developing roller 15...Release button 20...Strobe light emitter 21...Finder objective lens 24...Motor 25... - Main capacitor 26... Finder eyepiece 30... Transmission mechanism. Fig. 1 S (lens stay) Fig. 2

Claims (2)

[Claims] (1) In an instant camera in which developing processing liquid is developed while ejecting an exposed instant film unit out of the camera body by driving a developing roller, a gap between the developing roller and a discharge port formed in the camera body, An instant camera characterized in that a strobe device and a shutter release mechanism are arranged on the front side of the instant film unit ejected by the unfolding roller, and a motor for driving the unfolding roller and a main capacitor for the strobe are arranged on the back side. . (2) In an instant camera that develops a developing solution while discharging an exposed instant film unit out of the camera body by driving a developing roller, the developing roller and the discharge port formed in the camera body, A finder objective lens is disposed on the front side of the instant film unit discharged by the developing roller, and a finder eyepiece is disposed on the rear side, and the exposed instant film unit is discharged through the space between the finder objective lens and the finder eyepiece. An instant camera characterized by: