JPH11119292A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera capable of preventing the occurrence of misphotographing caused by erroneously inputted film sensitivity. SOLUTION: A CPU 40 displays a warning against the input value of film sensitivity on an LCD 27 through an LCD driver 65, when a film sensitivity value different from that of a photographic film 3 read by an automatic film sensitivity inputting means at the time of setting a first frame is inputted by a manual film sensitivity input means consisting of an up-down dial 60 and a manual input mode button. Simultaneously, the warning against the input value of the film sensitivity is displayed on the EL display part 61 of a camera main body 21 through a communication control circuit 71 as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera loaded with a brownie film on which a bar code is written.

[0002]

2. Description of the Related Art There is known a brownie film in which a photo film with light-shielding paper is attached to a photo film in the form of a strip having a width of about 6 cm and light-shielding paper is wound around a spool. This brownie film is available in two types, 120 type and 220 type. The 120-type brownie film is formed by covering the entire base surface of a photo film with black light-shielding paper longer than the photo film, and winding the photo film together with the light-shielding paper around a spool.

[0003] In the 220 type brownie film, a black light-shielding paper called a leader paper or a trailer is joined to the leading end and the rear end of the photographic film, and the light-shielding paper covering the base surface of the photographic film is omitted. By doing
A photo film having the same diameter and longer than 120 types can be wound around a spool.

[0004] In all of these 120-type and 220-type brownie films, a light-shielding paper and a photographic film are bonded by a bonding tape. Then, when the brownie film is loaded into the film loading chamber of the camera, winding is started on the spool of the film winding chamber in order from the leading end of the light-shielding paper. Then, when the photo sensor detects the rear end side of the bonding tape using the difference in the reflectance of light between the bonding tape and the photographic film, the predetermined length is determined from this rear end side as a reference. Only by sending the photo film, the first photographing frame is set.

At the time of setting the first photographing frame, a new 120 type or 220 type brownie film in which the film sensitivity information is described in the form of a bar code on the bonding tape is read from the bar code, and information such as film sensitivity is read. Is transmitted to the camera. On the other hand, in the case of an old-type brownie film in which film sensitivity information is not described on the bonding tape, it is necessary to manually input the film sensitivity to the camera each time the film is loaded.

[0006]

However, if a brownie film with a barcode and a brownie film without a barcode are used in combination, the brownie film with a barcode is loaded into a camera, and Despite the sensitivity being entered automatically,
The film sensitivity may be manually input by mistake. At this time, there is a mistake that a film sensitivity different from the film sensitivity automatically input by reading the bar code is manually input.

As described above, if photographing is performed while manually inputting a film sensitivity different from the original film sensitivity, there is a high possibility that photographing errors such as underexposure and overexposure will occur. In some cases, the user may manually input a film sensitivity different from the original film sensitivity and aim at the shooting effect by changing the exposure.In this case, however, a film sensitivity different from the original film sensitivity is input. It is necessary to notify the photographer of the fact that the operation is being performed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and has as its object to provide a camera that prevents a photographing error from occurring due to an incorrectly input film sensitivity.

[0009]

In order to achieve the above object, according to the present invention, there is provided a belt-shaped photographic film, and light-shielding paper provided at least at both ends of the photographic film.
The film sensitivity information of the photo film is written in a bar code on the surface, and a photo film with light-shielding paper comprising at least one end of the photo film and a joining tape for connecting light-shielding paper, and the photo film with light-shielding paper in a roll form A camera equipped with a film sensitivity automatic input means for reading the bar code, and a film sensitivity manual input means for manually inputting the film sensitivity information of the photographic film. A warning is issued when the film sensitivity value inputted by the film sensitivity automatic input means is different from the film sensitivity value inputted by the film sensitivity manual input means.

[0010]

FIG. 2 shows the appearance of a brownie film used in a camera according to the present invention.
A photo film 5 with a light-shielding paper comprising a photo film 3 (see FIGS. 3 and 4) and a light-shielding paper 4 is wound around a shaft 2a in a roll shape, and the tip 4a of the light-shielding paper 4 is slightly folded,
Stopped with adhesive tape 6. Flanges 2b are formed at both ends of the shaft portion 2a, and a shaft mounting hole 2c is formed at the center of each of the flanges 2b.

FIG. 3 shows a state in which a photographic film 5 with 120 type light-shielding paper is straightened.
The 120-type brownie film 1 has a standard size in which the number of frames that can be taken by the photo film 3 is 15 (or 16), for example, when the screen size of the shot frame is 41.5 × 56 mm semi-size. Of length (below,
120 standard type) and 8 frames (or 7 frames)
Length (hereinafter referred to as 120 half type)
There are two types. If there is no need to distinguish between the 120 standard type and the 120 half type, these are collectively referred to as the 120 type.

The light-shielding paper 4 is longer than the photographic film 3, and has a hole 4b formed at its leading end 4a for hooking the take-up spool. The photo film 3 is overlapped so that its base surface is aligned with the black back surface of the light-shielding paper 4, and is joined to the light-shielding paper 4 by a joining tape 7 at the leading end of the photo film 3.

FIG. 4 shows a 220 type photographic film 5 with light-shielding paper. In the 220 type, the light-shielding paper 4 is composed of a leader paper 8a joined to the leading end of the photographic film 3 with a joining tape 7, and a trailer 8a joined to the trailing end of the photographic film 3 with a joining tape 9. A hole 4b is formed in the tip end portion 4a of the leader paper 8a as in the case of the 120 type. The 220 type photographic film 3 is about twice as long as the 120 standard type. For example, when the screen size of the photographic frame is set to the semi-format, the number of frames that can be captured is 30 frames.

A bar code 10 is written on the bonding tape 7 of the new type of photo film with light-shielding paper 5 shown in FIGS. The well-known bar code 10 is formed by printing a long line in the width direction of the photographic film 3 with black ink on a white background surface of the bonding tape 7, and each bar represents one bit. For example, a wide black bar and a wide white bar represent a logical value “1”, and a narrow black bar and a white bar represent a logical value “0”. These bar codes 10 correspond to the ISO of the photo film 3.
It expresses the film sensitivity, and when the photo film 5 with light-shielding paper is loaded into the camera, the bar code 10 is automatically displayed.
Is read, and film sensitivity information is input to the camera.

On the other hand, no bar code is described on the bonding tape 12 of the old type photo film with light-shielding paper 11 shown in FIG. When using the photo film with light-shielding paper 11 of the type in which this bar code is not described, the IS
It is necessary to input the O-film sensitivity.

As one embodiment of the present invention, FIG.
Comprises a camera body 21 and a film holder 22 which is detachable from the camera body 21. Camera body 21
A telescopic focusing rail 23 is provided at the lower part of the camera, and a photographing lens 24 is attached to a tip portion. An elastic bellows 25 is provided between the taking lens 24 and the front surface of the camera body 21 to form an exposure optical path.

An angle finder 26 is mounted on the upper part of the camera body 21. The camera body 21
A main switch 27, a shutter speed setting dial 28, a release switch 29, an EL display section 61 for displaying various warnings, and the like are provided on a side surface of the camera.

The film holder 22 is loaded with a 120 or 220 type photo film with light-shielding paper. When the photo film with light-shielding paper loaded in the film holder 22 is attached to the camera body 21 and the lid (not shown) is pulled out, the first frame setting is automatically performed. In addition, even when the film holder 22 is detached from the camera body 21, the first frame setting is performed by operating the first frame setting button 66 described later.

As shown in FIGS. 7 and 8, on the upper surface of the film holder 22, an up / down dial 60 which is operated when manually inputting the film sensitivity, etc., the film sensitivity, the number of shots, the film type, etc. are displayed. LCD27,
And a mode switching button 64 for switching the display mode of the LCD 27, a first frame set button 66 for performing a first frame setting of a photo film with light-shielding paper, a manual input mode button 67 for switching to a film sensitivity manual input mode, and the like. .

FIG. 1 is an explanatory diagram showing a simple configuration of the camera 20. An unused brownie film 1 is loaded in a film storage chamber (not shown) of the film holder 22. When loading the brownie film 1, the leading end 4 a of the light-shielding paper 4 is inserted into the slit of the take-up spool 35. As the take-up spool 35, an empty spool of used brownie film is used. The take-up spool 35 is rotated by the camera-side drive shaft 50a engaged with the shaft mounting hole of the flange, and is rotated in the take-up direction for taking up the photographic film with light-shielding paper 5.

In the film storage room, one of the photo films 3 is placed.
A film roller 37 for detecting the transport length of the photographic film 5 with light-shielding paper when performing frame feed is provided. The film roller 37 is provided with, for example, rubber rollers 37b at both ends of a shaft 37a. The roller 37b comes into contact with the photo film 5 with light-shielding paper and is driven by the conveyance of the photo film 5 with light-shielding paper. Rotate.

A reflection type photo sensor 38 is provided near the film roller 37 so as to face the pass area of the bar code 10 on the bonding tape 7. The photo sensor 38 irradiates the photo film 5 with the light-shielding paper in the film path 33 with infrared rays and receives reflected light. The photo sensor 38 outputs a photoelectric signal having a signal level corresponding to the intensity of the received reflected light. The bar code 10 is read and the photo film 3 is detected based on the signal level of the photoelectric signal. The reason why infrared light is used in the photo sensor 38 is to prevent fogging of the photographic film 3.

The CPU 40 of the film holder 22 includes:
The RAM 40a and the ROM 40b are connected. RO
In M40b, a program for controlling each part of the camera 20, a value of a prescribed feeding length when the first frame setting of the photo film 3 is performed, and the like are written. C
The PU 40 controls each unit of the camera 20 based on a program in the ROM 40b, and also reads a barcode, determines an error, decodes the barcode 10, and the like. R
The AM 40a is used as a work memory for temporarily storing data necessary for various controls, in addition to storing a film sensitivity, a film type, and the number of photographable frames obtained by reading the barcode 10.

The photoelectric signal from the photo sensor 38 is sent to the waveform shaping circuit 43. The waveform shaping circuit 43 shapes the waveform of the photoelectric signal at an appropriate threshold level, and outputs a reflected signal having two signal levels of “L level” and “H level”. The reflected signal is output from the photo sensor 38.
Becomes "L level" when the black bar of the light-shielding paper 4 and the barcode 10 with low reflectance is detected, and becomes "H level" when the white bar with high reflectance is detected.

The reflected signal is used by the CPU 40 to detect the photographic film 3, determine the start and end of the reading period for reading the data section 12, read the bar code 10 (measure each bar), and the like. Sent to

A transport encoder 45 is connected to a shaft 37a of the film roller 37 via gears 44a and 44b. The transport encoder 45 includes, for example, an encoding plate 45a that is formed with a plurality of slits having a constant pitch radially and rotates with the rotation of the shaft 37a, a photo interrupter 45b that monitors passage of the slits of the encoding plate 45a, and a photo interrupter 45b. And a pulse generator (not shown) that generates an encode pulse when the photo interrupter 45b detects a slit.

The transport encoder 45 includes the film roller 3
One encode pulse (hereinafter, referred to as a transport pulse) is generated every time the photo film 7 is rotated by a predetermined angle, that is, each time the photo film with light-shielding paper 5 is transported by a predetermined length. This transport pulse is sent to the transport counter 46.

The transport counter 46 is for measuring the feed length of the photographic film 3, and its counter value is reset to "0" by the CPU 40, and the count value is incremented by 1 every time a transport pulse is input. Increment by one. The count value of the transport counter 46 is
Sent to 0. The count value of the transport counter 46 is
It is also used when the first frame setting of the photo film 3 is performed. That is, when the photo sensor 38 detects the bonding tape 12, the CPU 40 continues to compare the count value of the transport counter 46 with the value of the prescribed feeding length of the ROM 40b. The feeding of the attached photo film 5 is stopped, and this is set as a first photographing frame.

The driver 47 drives the feed motor 48 under the control of the CPU 40. The rotation of the feed motor 48 is transmitted to a gear 50 via a reduction gear train 49, and the take-up spool 35 is rotated by a drive shaft 50a formed on the lower surface of the gear 50.

The feed motor 48 includes a motor encoder 5
5 are connected. The motor encoder 55 has the same configuration as the transport encoder 45, and generates one encode pulse (hereinafter, referred to as a rotation pulse) each time the feed motor 48 rotates by a certain angle. The motor encoder 55 generates a sufficient number of rotation pulses to measure the width of each bar of the bar code 10. The motor encoder 55 sends a rotation pulse to a rotation counter 56.

The rotation counter 56 is for measuring the width of each bar of the bar code 10. The counter value is reset to "0" by the CPU 40, and the counter value is incremented by one every time a rotation pulse is input. Increment. The count value of the rotation counter 56 is
Sent to The CPU 40 determines whether the width of each bar of the barcode 10 is wide or narrow based on the count value, and decodes the film sensitivity information of the barcode 10. The photosensor 38, the waveform shaping circuit 43, the motor encoder 55, the rotation counter 56, and the CPU 40 constitute an automatic film sensitivity input unit.

A communication control circuit 71 for exchanging various data with the camera body 21 is connected to the CPU 40, and a camera-side contact 72 (see FIG. 9) provided at the end of the film holder 22 is used for the camera body. 21 side.

The CPU 40 determines whether a film sensitivity value different from the film sensitivity value of the photo film 3 read by the film sensitivity automatic input means at the time of the first frame setting is a film sensitivity manual operation comprising the up / down dial 60 and the manual input mode button 67. When input by the input means, the LCD 27
A warning is displayed for the input value of the film sensitivity. At the same time, through the communication control circuit 71, the camera body 21
The EL display unit 61 also displays a warning display for the input value of the film sensitivity.

The CPU 75 of the camera body 21 is connected to a release switch 57, a shutter device 62, a communication control circuit 73 for exchanging various data with the film holder 21, and the like. By setting the film holder 21 on the camera body 21, the camera side contact 74 (see FIG. 10) provided at the end of the camera body 21 and the holder side contact 72 are connected. Thus, the CPU 75 of the camera body 21 and the CPU of the film holder 21
40 can exchange data via the communication control circuits 71 and 73.

When the CPU 75 of the camera body 21 outputs a film sensitivity input warning display signal from the communication control circuits 71 to 40 of the film holder 21, the EL display 6
1 displays a warning display for the input value of the film sensitivity.

Next, the operation of the above configuration will be described with reference to the flowchart shown in FIG. When loading the brownie film 1, the photographer
Then, the film holder 22 is removed from the film holder 1, the brownie film 1 is loaded into the film holder 22, and the adhesive tape 6 is peeled off. Then, the bent front end portion 4a of the light-shielding paper 4 is inserted into and engaged with the slit of the take-up spool 35.

Thereafter, when the film holder 22 is mounted on the camera body 21 or the first frame set button 66 of the film holder 22 is operated, the first frame setting of the brownie film 1 is started. In the first frame set mode, the CP
U40 drives the feed motor 48 via the driver 47. By the rotation of the feed motor 48, the take-up spool 35 is rotated in the take-up direction via the gear 50 and the drive shaft 50a. As a result, the light-shielding paper 4 of the photo film with light-shielding paper 5 is wound on the take-up spool 35, and the light-shielding paper 4 wound on the brownie film 1 is fed toward the take-up spool 35.

When the CPU 40 starts feeding the photographic film 5 with light-shielding paper as described above, the CPU 40 activates the photo sensor 38. As a result, the photo sensor 38 outputs a photoelectric signal having a signal level corresponding to the reflectance of the photo film 5 with the light-shielding paper facing thereto, and outputs a reflected signal corresponding to the signal level from the waveform shaping circuit 43 to the CPU 40. Will be done.

The feeding of the photographic film 5 with light-shielding paper proceeds,
When the joining tape 7 reaches a position facing the photosensor 38, reading of the barcode 10 on the joining tape 7 is started. Then, the width data of each bar of the bar code 10 read sequentially is sequentially stored in the RAM 40a.

When the count value of the transport counter 46 reaches a specified value stored in the ROM 40b, C
The PU 40 stops the feeding motor 48 to stop feeding the photographic film 5 with the light-shielding paper. Thus, the first frame of the photo film 3 is set. CPU
40 is a photo film 3 from the read bar code 10.
The film sensitivity is determined, and the film sensitivity is set.
Then, the CPU 40 outputs a shooting preparation completion signal via the communication control circuit 71.

As described above, after the film sensitivity is set by reading the bar code 10, the photographer presses the manual input mode button 67 and then operates the up / down dial 60 to manually input the film sensitivity. Then, the CPU 40 of the film holder 22 compares the film sensitivity value input by the manual input means with the film sensitivity value already input by the automatic input means, and when both values are different, Then, a warning display for the input value of the film sensitivity is displayed on the LCD 27 via the LCD driver 65 to draw the photographer's attention.

At the same time, a warning display signal of the film sensitivity input is output to the CPU 75 of the camera body 21 via the communication control circuits 71 and 73. Upon receiving the warning display signal, the CPU 75 causes the EL display section 61 to display a warning for the input value of the film sensitivity.

In some cases, a professional photographer or the like may dare to input a film sensitivity different from the original sensitivity of the photographic film to aim at the effect of exposure, so that the input value of the film sensitivity is displayed on the LCD 27 or the EL display 61. Is displayed, the user can operate the release switch 57 to take a picture as it is.

In the above-described embodiment, when the film sensitivity value different from the already set film sensitivity value is input by the manual input means after the film sensitivity value is set by the automatic input means. LCD27
And an example in which a warning is displayed on the EL display unit 61. Of course, if a film sensitivity value is input in advance by a manual input unit and then input by a different film sensitivity automatic input unit, the LCD 27 is displayed. And EL display section 61
May be displayed as a warning. In addition to the display on the LCD and the EL, the means for giving a warning such as a warning sound or a blinking lamp is not limited.

[0045]

As described above, according to the present invention,
A strip-shaped photo film, light-shielding paper provided at least at both ends of the photo film, and a bar code on the surface of which the film sensitivity information of the photo film is written, and at least one end of the photo film is connected to the light-shielding paper. A film sensitivity automatic input means for reading the bar code, loaded with a brownie film comprising a photographic film with light-shielding paper comprising a bonding tape, and a spool obtained by winding the photographic film with light-shielding paper into a roll; and In a camera provided with film sensitivity manual input means for manually inputting film sensitivity information, a film sensitivity value input by the film sensitivity automatic input means and a film sensitivity value input by the film sensitivity manual input means are provided. A warning is given at the wrong time, so the film feeling input incorrectly It is possible to provide a camera to prevent the shooting mistakes caused by.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a simple configuration of a camera according to the present invention.

FIG. 2 is a perspective view showing an appearance of a brownie film in which a bar code is written on a joining tape.

FIG. 3 is an explanatory view showing a state in which a 120-type photo film with light-shielding paper is developed.

FIG. 4 is an explanatory view showing a state in which a 220-type photo film with light-shielding paper is developed.

FIG. 5 is an explanatory view showing a state in which a 120-type photo film with light-shielding paper without a bar code is developed.

FIG. 6 is a perspective view showing the appearance of the camera of the present invention.

FIG. 7 is a plan view of the camera of FIG. 6 with a viewfinder removed and viewed from above.

FIG. 8 is an enlarged explanatory view of an LCD part.

FIG. 9 is an explanatory view showing a connection side of a film holder with a camera.

FIG. 10 is an explanatory view showing a connection surface side of a camera with a film holder.

FIG. 11 is a flowchart simply showing a procedure for setting a first frame.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brownie film 2 Spool 3 Photo film 4 Shielding paper 7 Joining tape 10 Barcode 27 LCD 57 Release switch 61 EL display part 62 Shutter device

Continuing on the front page (72) Inventor Hisashi Hamada 3-13-45 Izumi, Asaka-shi, Saitama Fuji Photo Film Co., Ltd. (72) Inventor Tokuji Sato 3-13-45 Izumi, Asaka-shi, Saitama Fuji Photo Film Co., Ltd. In company

Claims (1)

[Claims] 1. A strip-shaped photographic film, light-shielding paper provided at least at both ends of the photographic film, and barcode information on the surface of the photographic film, and light-shielding at least one end of the photographic film. Photo film with light-shielding paper, consisting of a joining tape that connects paper and
And a brownie film consisting of a spool obtained by winding this photo film with light-shielding paper in a roll shape is loaded,
A film sensitivity automatic input unit for reading the bar code; and a film sensitivity manual input unit for manually inputting the film sensitivity information of the photographic film, wherein the film sensitivity value input by the film sensitivity automatic input unit is A camera that warns when the film sensitivity value input by the film sensitivity manual input means is different.