JPH07152082A - Information imprinter for camera - Google Patents

Abstract

PURPOSE:To provide an information imprinter for a camera capable of imprinting information on a film during its running with a simple constitution and high accuracy. CONSTITUTION:A sheet film 4 after being photographed is fed by spread rollers 12 and 13 and the top end of the film 4 is detected by a photoreflector 16. Moreover, a signal corresponding to the moving amount of the film is generated/ outputted by a spread photointerrupter 15, in response to the actions of the spread rollers 12 and 13. Further, at the time of feeding the film 4, date information, etc., are imprinted on a film surface by the division of several times by a date imprinting LED, based on an output signal from the spread photointerrupter 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera information copying apparatus, and more particularly to a camera information copying apparatus having a data copying mechanism.

[0002]

2. Description of the Related Art Conventionally, in an instant camera using a sheet film, film leading edge detecting means such as a photo reflector is provided at two places to detect the traveling speed of the sheet film, and data such as a date during traveling of the film. Japanese Patent Laid-Open No. 5-72621 discloses a technical means for imprinting.

In Japanese Patent Laid-Open No. 2-127631, the amount of rotation of a roller in contact with a roll film is detected, the amount of movement of the film is derived from the detection result, and data such as date is synchronized with the movement. The technical means for imprinting is disclosed.

[0004]

However, in the technical means disclosed in the above-mentioned Japanese Patent Laid-Open No. 5-72621,
When the film feeding speed becomes uneven during data transfer due to load fluctuations or the like, the intervals of the transferred data (numerals) may vary and the quality may deteriorate.

Further, in the technical means disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2-127631, it is necessary that the roller, which is the film movement amount detecting means, is always in contact with the film. That is, if the roller and the film are not always in contact with each other from the time when the photograph is taken to the time when the data such as the date is imprinted, the position of the screen on the film cannot be known. It was restricted.

In particular, when the technical means is applied to an instant camera that uses a current sheet film (instant film), if a roller that comes into contact with the sheet film is provided at the time of taking a photograph, the photographing screen may be blurred. there were.

The present invention has been made in view of the above problems, and provides an information copying apparatus for a camera, which has a simple structure and can accurately record information on the film while the film is running. The purpose is to do.

[0008]

In order to achieve the above-mentioned object, an information imprinting device of a camera according to the present invention supplies a film leading edge detecting device for detecting the leading edge of a photographed sheet film and the photographed sheet film. A film feeding means for feeding, a film movement amount detecting means for generating and outputting a signal corresponding to the film movement amount in response to the operation of the film feeding means, and for feeding the photographed sheet film. An information copying means for copying the predetermined information into a plurality of times based on the output signal from the film movement amount detecting means and copying the predetermined information on the film surface.

[0009]

In the information imprinting device of the camera according to the present invention, the film feeding means feeds the photographed sheet film, and the film leading edge detecting device detects the leading edge of the photographed sheet film. Also, in response to the operation of the film feeding means,
The film movement amount detecting means generates and outputs a signal corresponding to the film movement amount. Further, when the photographed sheet film is fed, the information imprinting means imprints the predetermined information on the film surface in a plurality of divisions based on the output signal from the film movement amount detecting means.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a bottom view showing a main part of an instant camera to which an information copying apparatus for a camera according to an embodiment of the present invention is applied.

The camera is a self-developing instant camera, and is adapted to raise an optical system block to a photographing standby position for photographing.

As shown in FIG. 1, the instant camera is provided with a photographing lens group 1 at a predetermined position, and behind the photographing lens group 1 (right side in the figure), the photographing lens group 1 is provided. Mirror 2 that reflects the light that has passed through the film toward the film 4
Is provided. A film pack 3 loaded with a self-developing instant film is mounted on one side of the instant camera.
Is the film 4 located at the top of the film pack 3.
Shows the state in which the exposure surface is arranged facing the mirror 2. In addition, a data imprinting section including a date imprinting LED 19 and a condenser lens 20 is disposed near the side edge of the mirror 2. The data imprinting unit will be described in detail later.

FIG. 2 is a side view of the essential parts of the instant camera viewed from the direction A shown in FIG.

An opening 6 is formed on the upper surface of the film pack 3.
Is formed, and a light shielding member 5 is arranged around the opening 6. At the uppermost position (upper side in FIG. 1) of the film pack 3, the film 4 to be exposed next has its exposed surface exposed through the opening 6, and the mirror 2 is exposed on the exposed surface.
The subject light reflected by is incident. In the figure, reference numeral 7 is a photographing screen of the film 4.

On the back side of the exposed surface of the film 4, an unexposed film (not shown) is arranged so as to overlap.

Returning to FIG. 1, a sheet type battery 8 is built in on the back side (lower side in the figure) of the film pack 3. As shown in FIG. 2, the sheet type battery 8 is provided with a minus terminal 9 and a plus terminal 10, and an electric circuit 11 for controlling the entire camera and the like is connected between the terminals. Power is supplied from 8. The electric circuit 11, which will be described in detail later, has exposure control, photometry, distance measurement, film feed, date imprinting,
Heating of a pair of spread rollers 12 and 13, which will be described later, control of a strobe, and the like are performed.

The spread rollers 12 and 13 are a pair of pressing rollers arranged in front of the film pack 3 (on the left side in FIG. 1), and the nip portion (occlusal portion) thereof is near the tip of the film 4. It is arranged so as to be perpendicular to the transport direction of the film 4. The spread roller 12,
13 is made of a conductive material, and is controlled by an electric circuit 11 described later to occlude the photographed film 4, conveys and discharges it, and presses the film 4 to expose the developing solution to the exposed surface 7 It is designed to spread throughout.

Further, as shown in FIG. 1, one end of the rotary shaft of the spread roller 13 arranged below the spread rollers 12 and 13 (in the front side of the paper in FIG. 1).
Includes a spread photo interrupter (SPPI) 15
Is provided. Furthermore, the spread roller 13
In the position corresponding to the spread photo interrupter 15 in, the impeller 14 is integrally fixed,
The spread photo interrupter 15 passes through the slit.

The spread photo interrupter 15
Outputs a pulse signal proportional to the rotation speed of the impeller 14, and from this, the rotation speed of the spread roller 13 can be detected. The pulse signal output of the spread photo interrupter 15 is sent to the electric circuit 11.

On the other hand, as shown in FIG. 2, a photoreflector (PR) 16 is disposed near the front of the upper spread roller 12, that is, near the film discharge port, and discharged from the spread rollers 12, 13. The leading end of the film 4 is detected. In addition, the photo-reflector 16 detects the reference position of the film, and then counts the pulse signals output from the spread photo interrupter 15, thereby performing the date imprinting operation by the data imprinting unit (see FIG. 1). , And the timing of turning off the spread motor (SP motor) 28 (see FIG. 9) for rotating the spread rollers 12 and 13 is controlled.

As described above, the spread roller 1
The reference numerals 2 and 13 are made of a conductive material, and one end thereof is in contact with an electrostatic discharge member for discharging static electricity generated on the surface of the film 4 during film discharge. That is, as shown in FIG. 2, the static elimination brush 17 which is the static elimination member is in contact with one end of the spread roller 12.

FIG. 3 is a sectional view of the principal part showing the B section in FIG.

As shown in the figure, one end of a static elimination brush 17 made of a conductive material is provided on the upper spread roller 12, and a static elimination brush 18 equivalent to the static elimination brush 18 is provided on the lower spread roller 13. One ends are in contact with each other. The other ends of the static elimination brushes 17 and 18 are both connected to the negative terminal 9 of the sheet type battery 8 and the ground potential portion.

Here, the role of the static eliminator will be described.

When the film 4 is conveyed while being pressed by the pair of spread rollers 12 and 13, static electricity is generated on the surface of the film 4. As described above, the spread rollers 12, 13 and the static elimination brushes 17, 18
Since this is made of a conductive material, the static electricity flows through the spread rollers 12, 13 and the static elimination brushes 17, 18 to the negative terminal of the sheet type battery 8, that is, the ground potential portion.

In the instant camera, the static elimination brushes 17 and 18 and the negative terminal 9 of the sheet type battery 8 are used.
The wiring to the ground potential portion is designed to be as short and thick as possible and to have a low impedance.

A light-shielding member 82 provided at the exit of the photographed film in the film pack 3 is provided so as to rub against the ejected film 4. This light shielding member 82 is charged by rubbing against the discharged film 4, and static electricity is generated on the film 4.

FIG. 4 is a sectional view of an essential part showing a modified example of the static eliminator.

In this example, the spread rollers 12, 1 are used.
3 is provided with a conductive static elimination ball 24 which is in contact with one end surface of the roller 3 and rotates with the rotation of the spread rollers 12 and 13. The static elimination ball 24 is attached to the spread rollers 12, 1 by a conductive spring 23 and a ball support member 22.
3 is pressed against one end surface. The spring 23 is supported by a conductive member 23a fixed to an insulating portion 25 fixed to the camera exterior. Further, the conductive member 2
A lead wire 23b extends from 3a, and one end of the lead wire 23b is connected to the negative terminal 9 of the sheet type battery 8, that is, the ground potential portion.

As a result, the static electricity generated on the surface of the film 4 flows to the negative terminal of the sheet type battery 8, that is, the ground potential portion, through the spread rollers 12 and 13 and each of the conductors.

As described above, in the present embodiment, it is not necessary to dispose the charge eliminating member in front of the spread rollers 12 and 13, and the apparatus can be further downsized.

FIG. 5 is a cross-sectional view of an essential part showing another modified example of the static eliminator.

In this example, the spread rollers 12, 1 are used.
On the opposite side of the occlusal portion of 3, the conductors 26 are arranged in contact with the spread rollers 12 and 13, respectively. The conductor 26 is pressed against the spread rollers 12, 13 by a spring 27 which is a conductor, and the spring 2
7 is supported by a conductive member 27a fixed to an insulating portion 25 fixed to the exterior of the camera. Further, a conductive wire 27b extends from the conductive member 27a, and one end of the conductive wire 27b is connected to the positive terminal 10 of the sheet type battery 8. As a result, static electricity is generated by the sheet type battery 8
It is designed to flow to the positive terminal of.

Returning to FIG. 2, the heating means of the spread roller in the instant camera to which the camera information copying apparatus of this embodiment is applied will be described.

A heater 21 for heating the spread rollers 12, 13 is disposed in contact with one end of the rotary shafts of the spread rollers 12, 13. Further, a temperature measuring circuit 21a for measuring the temperature of the spread rollers 12, 13 is arranged in contact with the other end of the spread rollers 12, 13. The temperature measuring circuit 21a
Details of will be described later.

When the temperature is low by the heating means, the film 4 is heated through the spread rollers 12 and 13, the temperature is detected by the temperature measuring circuit 21a, and the heater 21 is controlled so that the developing temperature becomes a constant temperature suitable for developing. To do. This keeps the progress of development constant and the density of the image on the film constant. Further, by setting the temperature to the temperature at which the color film develops the best color (25 ° C. in this embodiment), it is possible to prevent the color balance from being lost even when the ambient temperature is low.

FIG. 6 is an explanatory view showing a modification of the heating means.

This modification is characterized in that a heater as a heating means is built in the spread rollers 12 and 13.

Both of the spread rollers 12 and 13 are internally provided with a heater 12a shown in the figure. The heater 12a is a conductor of the spread rollers 12, 13
Insulated from the surface of. Contact points 12b to which the terminals of the heater 12a are connected are provided at both ends of the spread rollers 12 and 13, respectively, and are insulated from the roller surfaces of the spread rollers 12 and 13 by an insulating portion 12d. ing.

Further, one end of the power feeding brush 12c is in contact with each of the contact portions 12b. Of the power supply brushes 12c, the other end of one brush 12c is connected to the ground potential part and the negative terminal 9 of the sheet type battery 8, and the other end of the other brush 12c is a sheet via a transistor 12e. It is connected to the positive terminal 10 of the mold battery 8.

The transistor 12e is the heater 12a.
A transistor that turns on / off power supply to the
It is adapted to be controlled by the PU 53a (see FIG. 9). Further, the heater 1 is controlled by the CPU 53a.
2a is turned on / off. On the other hand, the spread roller 12, 13 is provided with the temperature measuring circuit 21a, and the output of the temperature measuring circuit 21a is the CP.
It is designed to be input to U53a.

In the figure, reference numeral 17 is the above-mentioned static elimination brush, which is designed to eliminate static electricity of the spread roller 12. Further, reference numeral 14 is the above-mentioned impeller, which is adapted to detect the rotation speed of the spread roller 13.

As described above, the heating means first includes the CPU 5
3a turns on the transistor 12e, and the heater 1
Heat 2a. After this, spread rollers 12, 13
The surface temperature of is measured by the temperature measuring circuit 21a, and the CPU 53a controls ON / OFF of the transistor 12e based on the result. As a result, the surface temperature of the spread rollers 12 and 13 is kept constant.

FIG. 7 is a bottom view showing the outer shape and internal configuration of an instant camera to which the information copying apparatus for a camera of this embodiment is applied, and shows a state at the time of photographing.

As shown in the figure, the image pickup lens group 1 is provided inside a shutter unit 29, and the mirror 2 is covered with a mirror part exterior 30. Further, on one side of the mirror 2, the mirror 2 and the receiving member 31 of the date imprinting portion including the date imprinting LED 19 and the condenser lens 20 are integrally provided. Further, in the figure, reference numeral 32 is a light-shielding rubber for preventing light leakage from the side of the mirror 2, and reference numeral 33 is a camera body.

In this camera, by disposing the date imprinting portion in the vicinity of the side edge of the mirror 2, the respective receiving members can be integrated and the cost can be reduced.

FIG. 8 shows a state in which the optical system block, that is, the shutter unit 29, the mirror 2, the date imprinting section and their supporting members are housed in the camera body 33 in the instant camera shown in FIG. It is a bottom view of the external shape and internal configuration of the camera shown.

The instant camera is folded as shown in FIG. 8 when carrying and storing, and when taking an image, the optical system block is raised to the image taking standby position as shown in FIG. 7 to take an image. Has become.

FIG. 9 is a block diagram showing an electric circuit 11 (see FIG. 2) in an instant camera to which the camera information projecting apparatus of this embodiment is applied. In the drawings, the members already described are given the same reference numerals, and the description thereof will be omitted here.

The instant camera includes an external light direct photometric sensor 35, a lens 34 for the external light direct photometric sensor, a shutter 36, a main aperture 37 of the shutter, a sub-aperture 38 for the direct photometric sensor, and a movement of the shutter. A photo interrupter (shutter PI) 39 for detecting is provided. The outputs of the direct photometric sensor 35 and the shutter PI 39 are AEI, which is a control unit described later.
It is designed to be input to C40.

The AEIC 40 is a control unit for performing photometry and driving / controlling various actuators such as the shutter motor 41 described later. The shutter motor 41 is a motor for extending / retracting the lens for focusing and driving the shutter, and is controlled by the AEIC 40. The output of the shutter motor 41 can be switched between lens drive and shutter drive by the differential gear 42.

The cam gear 43 for opening and closing the shutter 36 is driven by the output of one of the differential gears 42. The cam gear 4
3 includes a shutter magnet (shutter Mg) 44, a magnet switch (MGSW) 45, and a cam gear initial position switch (CISW) 46. The shutter magnet 44 controls the opening and closing of the shutter 36 and the switching of the differential gear 42 in cooperation with the movement of the cam gear 43.
It is controlled by the AEIC 40. Also, the magnet switch 45 and the cam gear initial position switch 4
A switch 6 detects the state of the cam gear 43, and the result is input to the AEIC 40.

On the other hand, the above differential gear 4
The other output of 2 drives the feed screw 47 for extending and retracting the photographing lens.
Further, the forward rotation of the feed screw 47 (normal rotation of the shutter motor)
Then, the photographing lens group 1 is extended, and the reverse rotation of the feed screw 47 (reverse rotation of the shutter motor) causes the photographing lens group 1 to be retracted. The amount of extension of the photographing lens group 1 is determined by the lens initial position switch (LISW) 48.
And an autofocus photo interrupter (AFPI) 49 for detecting the rotation amount of the feed screw 47. The lens initial position switch 48 and the autofocus photo interrupter 49
The output of is input to the AEIC 40.

Further, the AEIC 40 drives the spread motor 28, controls the drive of the spread roller 12 and the open operation of the camera (the operation of changing the state of FIG. 8 to the state of FIG. 7). Further, the heater 21 is driven to control the heating of the spread roller 12. The AEIC40
A signal from the temperature measuring circuit 21a is input to the spread roller 1 by this.
The heating control of 2 and 13 is performed. Further, the AEIC 40 is connected with the date imprinting LED 19 composed of a one-digit number display LED, and controls the date imprinting LED 19.

Other signals from various switches and the like are input to the AEIC 40. For example, a door for detecting whether or not the door for inserting and removing the film pack 3 is latched. A signal from the latch switch (DLSW) 50 is input to the AEIC 40.

Further, the AEIC 40 has the photoreflector 1 for detecting the leading end of the discharged film 4.
6. A signal from the spread photo interrupter 15 or the like that detects the rotation of the spread rollers 12 and 13 is input. In the figure, reference numeral 17 is a static eliminator brush for discharging the static electricity of the spread roller 12 to the ground potential portion, and reference numeral 14 is an impeller attached to the rotary shaft of the spread roller 12.

The instant camera to which this embodiment is applied is equipped with a stroboscopic light emitting section 51, and has a CPU 53a.
It is driven by a strobe circuit 52 controlled by. The CPU 53a is a controller that controls the entire camera, and controls the AEIC 40, the strobe circuit 52, the LCD 53 and the like, and inputs signals from various switches and the like. This L above
On the CD 53, a remote control / self-mode display, the number of remaining films, the date, etc. are displayed.

The CPU 53a includes an EEPROM 54.
Is connected, and adjustment values for photometry and the like are stored.
Further, a buzzer 55 is connected to the CPU 53a so as to emit a warning sound when the remaining film amount becomes zero. Further, an LED 56 provided in the vicinity of the finder is connected to the CPU 53a to display information such as during strobe charging, completion of charging, and AF lock.

The CPU 53a is normally driven by the sheet type battery 8, but when the power source of the camera is turned off, the coin type battery 57 for date backup is used to supply power. Has become. Also,
The CPU 53a is connected with a push button switch 58 for switching the display mode of the date and for correcting the date, and a push button switch 59 for switching the remote control / self mode so that signals can be input respectively. .

Further, a power switch 60 is connected to the CPU 53a. When the power switch 60 is turned on, the entire camera operates under the control of the CPU 53a, and the camera shifts from the folded state (FIG. 8) to the open state (FIG. 7).
The open operation is performed by the reverse operation of the SP motor 28, and the power is turned off by manually folding the optical system block of the camera.

The CPU 53a includes 1st and 2n
A release button 61 having a release switch (1R / 2RSW) is connected. Then, by turning on the 1st release switch, an AFI to be described later
Distance measurement is performed by C62, and the shutter is released by turning on the second release switch that follows.

The AFIC 62 is a control circuit for performing distance measurement and pre-photometry, and drives the infrared light projecting LED 63 for infrared active distance measurement under the control of the CPU 53a. The infrared light projecting LED 63
The infrared light emitted from the object is irradiated onto the subject through the light projecting lens 64, and the reflected light from the subject is received by the light receiving PSD 65 through the light receiving lens 66. On the other hand, at a timing different from this, the subject light incident through the pre-photometry lens 68 is input to the pre-photometry sensor 67, and the output of the pre-photometry sensor 67 is input to the AFIC 62. ing.

Further, the CPU 53a has a remote controller I
A C (RMIC) 69 is connected to input a signal from the remote control sensor 70. The remote control IC 69 drives the remote control self LED 71. In the figure, reference numeral 72 is a remote control transmitter that is separate from the camera body, and light from the transmitter 72 is input to the remote control sensor 70.

The AEIC 40 further receives signals from an upper cover latch switch (ULSW) 73, a camera open switch (COSW) 74, and an ISO sensitivity switch (ISOSW) 75 for detecting the ISO sensitivity of the film. It is supposed to do. The upper cover latch switch (ULSW) 73 detects that the camera is completely open. The camera open switch (COSW) 74 detects that the camera open operation has started. The signal from the ISO sensitivity switch 75 is also input to the CPU 53a in addition to the AEIC 40.

FIG. 10 is an electric circuit diagram for explaining the temperature measuring circuit 21a in more detail.

This temperature measuring circuit 21a is designated by reference numeral 7 in the drawing.
A reference current source circuit shown by 6 is provided, and an output current I of the reference current source circuit is converted into a voltage V by a resistor R4 and output.

The output current I has a Boltzmann constant of k,
If the absolute temperature is T and the electron charge is q, then I = (kT × ln10) / qR1.

Then, as described above, the output current I flows through the resistor R4, whereby the output voltage V becomes V = R4 × I = (R4 × kTln10) / qR1 and is proportional to the absolute temperature T. Main temperature measuring circuit 21a
Then, the output voltage V is converted into a digital value by an analog / digital converter incorporated in the AEIC 40, and the exposure amount is corrected or the heater 2 is converted based on the value.
The spread rollers 12 and 13 are heated by 1 to cancel the influence of the developing temperature.

FIG. 11 is an electric circuit diagram showing a modification of the temperature measuring circuit 21a.

In this example, the voltage regulator 77
It outputs a constant voltage. Further, a fixed resistor 78 is provided at the output of the voltage regulator 77.
Thermistor 7 whose resistance value changes with a and ambient temperature
8 are connected in series, whereby the voltage V at the upper end of the thermistor 78 changes depending on the temperature.

FIG. 12 is a diagram showing the relationship between the developing temperature and the density of the image on the film in the developing temperature compensator of the instant camera.

As shown in the figure, in the developing temperature compensator, the higher the temperature, the more the development proceeds, and the density becomes higher. At this time, the exposure amount is corrected by the temperature, or if the temperature is low, the developing temperature is fixed by heating,
The image density on the film is kept constant. In the case of a color film, the color balance may be destroyed depending on the temperature, but this can be avoided by setting the temperature to a temperature at which the color balance is optimum by heating.

FIG. 13 is a diagram showing the relationship between the temperature, which is the output of the temperature measuring circuit 21a in the developing temperature compensating device for the instant camera, and the integral target value in direct photometry.

As shown in the figure, in the developing temperature compensating apparatus, when the temperature cannot be completely corrected by the above-mentioned heating, the higher the temperature is, the lower the integration target value is controlled to control the density of the image on the film. Is constant.

FIG. 14 is a diagram showing the relationship between the integral value during exposure in the developing temperature compensating apparatus and the integral target value V0.

As shown in the figure, in the developing temperature compensating apparatus, the shutter is closed when the integrated value reaches the integrated target value V0, but the target value V0 is changed according to the temperature.

Next, the operation of the instant camera to which the camera information imprinting apparatus of this embodiment is applied will be described with reference to the flowcharts shown in FIGS.

First, the operation when the film pack 3 (see FIGS. 7 and 8) is replaced and attached will be described with reference to the flowchart shown in FIG.

In this embodiment, one film pack 3 contains ten films 4 and one light-shielding paper above it. First, in step S1, the film pack 3
The photographer releases the latch on the film door for loading and unloading. The release of the latch is detected by the door latch switch (DLSW) 50 (see FIG. 9). While the latch is released, operations such as film advance and shooting are prohibited. Next, step S2
Then, the remaining film number data to be displayed on the LCD 53 is reset to 10.

Next, in step S3, the photographer makes a film
Open the door, and the used film pack 3 in step S4
Take out. A new film pack 3 is inserted in step S5, and the film door is closed in step S6. As a result, the film door latch is engaged in step S7. The fact that the latch is applied is detected by the door latch switch (DLSW) 50, and step S
At 8, the spread motor (SP motor) 28 is turned on,
Start normal rotation.

During the normal rotation of the spread motor 28, the driving force of the spread motor 28 is the spread roller 1
2, 13 and the film 4, which is called a pick, which is arranged at the top of the film pack or the member for pushing the light-shielding paper, is transmitted.
Then, the spread rollers 12 and 13 start to rotate.

Next, in step S10, the light emitting side of the photo reflector (PR) 16 for detecting the leading end of the discharged film 4 or light-shielding paper is turned on, and step S1
At 1, the light emitting side of the spread photo interrupter (SPPI) 15 for detecting the rotation amount of the spread roller 12 is turned on. In step S12, the above-mentioned pick pushes out the light-shielding paper on the uppermost layer of the film pack 3. The tip of the extruded light-shielding paper eventually reaches the occlusal portion of the spread rollers 12 and 13 that are already rotating, and is drawn between the upper and lower spread rollers 12 and 13, and thereafter, the spread rollers 12 and 13 are spread. Is discharged by the rotation of.

In step S13, the front end of the light-shielding paper reaches the position of the photo reflector (PR) 16 and waits for the photo reflector 16 to turn on. Same photo reflector 16
When is turned on, step S
Spread Photo Interrupter (SPPI) 15 at 14
The counting of the pulse signal of is started.

In step S15, the process waits until the count value of the pulse signal reaches the "target value 7". The target value 7 is such that the film 4 or the light-shielding paper is completely discharged, and the rear end of the film 4 or the light-shielding paper is spread rollers 12,
It corresponds to the position away from. Step S15
When the "target value 7" is reached, the light-shielding paper has been completely discharged, so the spread motor (SP motor) 28 is turned off in step S16, and the replacement operation of the film pack 3 is completed.

Next, the operation at the time of photographing will be described with reference to the flowcharts shown in FIGS.

In the flowchart shown in FIG. 16, steps S21 to S27 are operations when the power is turned on. For the camera in the folded state (state shown in FIG. 8), the power switch 60 (see FIG. 9) in step S21.
When is turned on, the CPU 53a is activated, and step S22
The spread motor 28 is rotated in reverse. Since the force of the spread motor 28 at the time of reverse rotation is transmitted to the member for camera open operation, step S2
The camera opens at 3. Completion of opening of the camera (state of FIG. 7) is detected by the upper cover latch switch (ULSW) 73, and the spread motor 28 is turned off in step S24.

Then, in step S25, the LCD 53 is turned on to display the remaining number of films and the date, and in step S26, the main condenser for the flash is charged to be in a light emitting state.

Further, in step S27, the spread roller 1 is driven by the output of the temperature measuring circuit 21a.
When the surface temperatures of 2 and 13 are 25 ° C. or lower, heating of the spread rollers 12 and 13 is started by turning on the heater 21. After that, the temperature measuring circuit 21a continues to monitor the surface temperature of the spread rollers 12 and 13 and controls the temperature to be 25 ° C.

When the surface temperature is 25 ° C. or higher, heating is not performed. Also, even when heating,
Since driving the heater 21 for heating consumes a large amount of power, it is turned off when the camera is left for 30 seconds after the power is turned on. The heating operation is restarted by turning on the 1st release switch of the release button 61.

Here, another example will be described in which a heating sequence for further reducing power consumption is provided.

When the surface temperature of the spread rollers 12 and 13, that is, the ambient temperature is 25 ° C. or lower, the spread rollers 12 and 13 are heated as described above, but the heating operation is started by the 1st release switch. Regarded by on. Then, when the heating operation is started, it is displayed in the vicinity of the finder and the LCD 53 that heating is being performed.

FIG. 18 is a front view showing a display example near the finder in this example.

In the figure, reference numeral 79 is a finder, reference numeral 56 is an LED for displaying the above-described strobe and auto focus, and reference numeral 80 is a red LED for indicating that the spread rollers 12, 13 are being heated.

FIG. 19 is a front view showing a display example of the LCD in this example.

In the figure, reference numeral 53 is the LC of the camera described above.
D and reference numeral 81 are indications indicating that heating is in progress. In this example, when the heating operation is started, a mode in which photographing is prohibited until the surface temperature of the spread rollers 12 and 13 reaches an appropriate value and a mode in which photographing is prohibited are set. When the 1st release switch is turned on to indicate that heating is in progress, the photographer who is concerned about the loss of image quality such as the loss of color balance and the reduction of contrast when using color film Is set in a mode in which photographing during heating is prohibited, and after waiting for the display during heating to disappear, photographing is performed, whereby the above-mentioned deterioration in image quality can be prevented.

On the other hand, in the situation where the photo opportunity is prioritized, it is possible to set the non-prohibited mode and take a picture immediately. The correction at this time is performed by the above-described correction of the exposure amount. When the photographing is finished, the heating operation is finished (the heater is turned off).

Next, another example will be described in which a heating sequence for further reducing power consumption is provided.

This example is characterized by detecting that the photographer holds the camera and starting the heating operation. That is, a pressure sensitive switch is provided on the grip of the camera to detect whether or not the grip is gripped. Then, when it is detected by the pressure sensitive switch that the camera is in the open state and the grip is gripped, the heating operation is started. On the other hand, on the contrary, when the camera is closed or it is detected that the hand is separated from the grip, that is, when the pressure sensitive switch is turned off, the heating operation ends.

Returning to the explanation of the flow chart shown in FIG. 16, steps S28 to S58 show the operation at the time of photographing one image. That is, when the release button 61 is lightly pressed to reach the first pressing step, 1R is pressed in step S28.
The SW (1st release switch) is turned on, and in step S29, the heating operation is restarted if the heating is required after being left for 30 seconds. AF in step S30
Distance measurement is performed by the IC 62, the projection LED 63, and the PSD 65.

When the release button 61 is pressed further deeply and the second pressing step is reached, it is pressed in step S31.
The RSW (2nd release switch) is turned on, and pre-photometry is performed by the pre-photometry sensor 67 in step S32.

Since the object distance data and the brightness data have been obtained by the above operation, the CPU 53 at step S33.
By referring to the table stored in a, the FNo. To decide.

FIG. 20 shows the CPU in the instant camera to which the information projecting device for the camera of this embodiment is applied.
53a is a chart showing an exposure control table included in 53a.

In the conventional flashmatic system, in the case of a lens shutter, overexposure is caused by the portion A in the aperture waveform as shown in FIG. In the table shown in FIG. 20, a combination of subject brightness data obtained by pre-photometry and subject distance data obtained by distance measurement is used to obtain FNo. To decide. Therefore, the exposure amount of natural light in the portion A shown in FIG. 21 can be predicted in advance, and the FNo. Can be increased (the aperture can be narrowed).

By doing so, it is possible to control the strobe to emit a large amount of light (almost full emission) on the small aperture side and to control the exposure with high accuracy (overexposure does not occur). If you fire a large amount of flash on the small aperture side,
Most of the exposure is done on the small aperture side, which deepens the depth of field and improves the quality of the photograph. On the other hand, the instant camera requires high exposure accuracy because it cannot be corrected by burning like a photograph taken with a 35 mm camera. The exposure control system of this camera meets both of these requirements.

Returning to the explanation of the flow chart of FIG.
In step S34, the shutter motor 41 (see FIG. 9) starts to rotate normally. Therefore, first, the cam gear 4
3 is locked and the differential gear 42 causes the lens feed screw 47 to rotate in the normal direction, so that the taking lens group 1 is extended in step S35. The amount of extension of the photographing lens group 1 is detected by the lens initial position switch 48 and the autofocus photo interrupter 49, and is extended by an amount determined by the subject distance data described above.

After the feeding operation of the photographing lens group 1 is completed, the shutter magnet (shutter Mg) 4
The engagement of the cam gear 43 is completed by 4, and the cam gear 43 is rotated in a predetermined direction. As a result, the rotation of the feed screw 47 is stopped. On the other hand, the exposure is performed in step S36 by the rotation of the cam gear 43. That is, the rotation of the cam gear 43 drives the shutter 36, and the main aperture 37 and the sub aperture 38 start to open in synchronization. The movement of the shutter 36 is detected by the shutter photo interrupter (shutter PI) 39, and the flash emission FNo. Strobe light emission part 5
Make 1 emit light.

In parallel with this, the light passing through the sub diaphragm 38 is integrated by the direct integration photometric sensor 35, and when the integration target value V0 (see FIG. 14) is reached, the shutter magnet (shutter Mg) 44 is activated. The shutter is turned off, the shutter 36 is closed, and the exposure is completed. The integration target value V0 is
It is determined by the film sensitivity information by the ISO sensitivity switch (ISOSW) 75 and the temperature information by the temperature measuring circuit 21a.

Although the influence of the developing temperature is corrected by heating the spread rollers 12 and 13, it cannot be corrected when the temperature is higher than the standard value (25 ° C. in this embodiment). Further, even if heating is performed at a low temperature, it is not always possible to raise the temperature to the standard temperature. Therefore, in the present embodiment, the influence of the difference between the standard temperature and the temperature at the time of photographing due to these causes is determined by the integration target value V
Correction is performed by changing 0 and changing the exposure amount.

Next, in step S37, the shutter motor 41 is rotated in the reverse direction so that the lens is retracted in step S38 to return the lens to the initial position. The initial position is detected by the lens initial position switch (LISW) 48. Next, in step S39, the shutter motor 41 is normally rotated to return the cam gear 43 to the initial state, and in step S40, the shutter motor 41 is turned off. The initial state of the cam gear 43 is detected by the cam gear initial position switch (CISW) 46.

Next, proceeding to FIG. 17, in step S41,
The forward rotation of the spread motor 28 is started for the transport / discharge operation and the development start operation of the filmed film 4.
As a result, in step S42, the spread roller 12,
13 starts to rotate, the film 4 is conveyed, the film 4 is pressed and crushed by the spread rollers 12 and 13, the developing solution is diffused, and the developing operation is started.

In this camera, when the ambient temperature is low and the spread rollers 12 and 13 are heated, that is, the heater 21 is turned on / off to keep the surface temperature of the spread rollers 12 and 13 constant. If
The rotation speed of the spread motor 28 is slowed to slow down the transport speed of the film 4.

As a result, the problem of the method of heating the film through the spread roller, which is generally the problem of the low heat transfer efficiency due to the small contact area between the roller and the film, is solved. That is, the transport speed of the film is slowed down and the time during which the spread rollers 12, 13 and the film 4 are in contact with each other is lengthened so that the heat of the spread rollers is more easily conducted and the temperature correction effect is improved. .

Another example of the temperature correction will be described.

This example is characterized in that a second temperature sensor for measuring the ambient temperature is provided in addition to the sensor for measuring the surface temperature of the spread rollers 12, 13. And
In this example, the conveying speed of the film 4 is controlled by the ambient temperature as shown in the characteristic diagram of FIG.

Returning to the explanation of the flow chart shown in FIG. 17, the light emitting side of the photo reflector (PR) 16 is turned on in step S43 and the spread photo interrupter ( The light emitting side of the SPPI) 15 is turned on. Next, in step S45, the pick is moved by the driving force of the spread motor 28, and one film 4 having been photographed is pushed out from the film pack 3. And the extruded film 4
Is drawn into the spread rollers 12 and 13 that are already rotating, and is discharged while being pressed and crushed. In step S46, the tip of the film 4 reaches the position of the photo reflector (PR) 16, and the photo reflector (P)
R) Wait for 16 to turn on. When the photo reflector (PR) 16 is turned on (initial position detection), the spread photo interrupter (SPP) is detected in step S47.
I) Start counting 15 pulse signals.

Next, in steps S48 to S52,
While the film is being fed, the date is imprinted on each digit, divided into six times. LED1 imprinted on the date
Reference numeral 9 is a one-digit numeral display LED as shown in FIG. First, in step S48, the memory "N" in the CPU 53a is set to N = 1. Next, in step S49, the count value of the pulse signal from the spread photo interrupter (SPPI) 15 is the target value 1 (since N = 1).
Wait for The target values 1 to 6 correspond to respective positions within the photographing screen 7 of the film 4 shown in FIG.

When the film 4 is fed to the imprinting position and the count value reaches the target value 1, step S
At 50, the date imprinting LED 19 is caused to emit light and the first digit is imprinted. The light emission time is determined by the information of the ISO sensitivity switch (ISOSW) 75.

In step S51, 1 is added to N (N = 2), and if N = 7 in step S52, the process returns to step S49. Hereinafter, the second to sixth digits are imprinted in the same manner as the first digit imprinting. 6 in step S50
When the imprinting of the digit is completed, N = 7 in step S51.
Therefore, after step S52, the process proceeds to step S53.

In step S53, the process waits until the number of pulses from the spread photo interrupter (SPPI) 15 reaches the target value 7. Since the target value 7 corresponds to the film discharge completion position as described in the description of the light-shielding paper discharge operation described above, the spread motor (SP motor) 28 is turned off in step S54.

Thereafter, in step S55, the light emitting side of the photo reflector (PR) 16 is turned off, and in step S56.
With the above spread photo interrupter (SPPI) 15
Turn off the light emitting side of. By these operations, the discharge is completed while the date is imprinted and the film 4 is pressed and crushed.

By the operation up to this point, one film has been reduced, so in step S57, the remaining film number display on the LCD 53 is decremented by one. Next, step S58.
Then, charge the main condenser of the flash for the next shot.

The above steps S28 (see FIG. 16) to S
Reference numeral 58 denotes an operation for photographing one image, and when another image is photographed, the process returns to step S28 and the same operation is repeated.

Next, in steps S59 to S61, the operation when the photographing is completed and the optical system block of the camera is folded will be described.

In step S59, the camera shutter unit 29 or the mirror exterior 30 in FIG. 7 is pushed to close the optical system, that is, the state shown in FIG. The fact that the optical system is closed is detected by the camera open switch (COSW) 74 shown in FIG. 9, and the power of the camera is turned off in step S60.
At the same time, the LCD 53 is turned off in step S61.

As described above, according to the information imprinting apparatus of the camera of the present embodiment, there is no restriction that the film moving amount detecting means such as the roller should always be in contact with the film, so that the degree of freedom in designing the apparatus is high. Has the effect of increasing. Particularly, as described above, the effect is remarkably exhibited when the embodiment is applied to an instant camera using a sheet film (instant film).

Further, in addition to the effects described above, during the imprinting of the information on the film, even if the feeding speed of the film is uneven, the intervals of the data such as characters, numbers and dots to be imprinted may vary. Since it does not exist, it also has the effect of improving the quality of the information to be imprinted.

[0128]

As described above, according to the present invention, it is possible to provide an information copying apparatus for a camera which has a simple structure and which can accurately record information on the film while the film is running.

[Brief description of drawings]

FIG. 1 is a bottom view showing a main part of an instant camera to which an information copying apparatus for a camera according to an embodiment of the present invention is applied.

FIG. 2 is a side view of a main part of the instant camera viewed from the direction A shown in FIG.

3 is a cross-sectional view of a main part of the static eliminator in the instant camera, showing the cross section B in FIG.

FIG. 4 is a main-portion cross-sectional view showing a modification of the static eliminator in the instant camera.

FIG. 5 is a sectional view of an essential part showing another modification of the static eliminator in the instant camera.

FIG. 6 is an explanatory diagram showing a modification of the heating means in the instant camera.

FIG. 7 is a bottom view showing the outer shape and the internal configuration of the instant camera during shooting.

FIG. 8 is a diagram showing the instant camera shown in FIG.
FIG. 3 is a bottom view of the outer shape and internal configuration showing a state when the optical system block is housed in the camera body.

FIG. 9 is a block diagram showing an electric circuit in an instant camera to which the information copying apparatus for a camera according to the present embodiment is applied.

FIG. 10 is an electric circuit diagram for explaining the temperature measuring circuit in the instant camera in more detail.

FIG. 11 is an electric circuit diagram showing a modification of the temperature measuring circuit in the instant camera.

FIG. 12 is a diagram showing the relationship between the developing temperature and the density of the image on the film in the developing temperature compensating apparatus for the instant camera.

FIG. 13 is a diagram showing a relationship between a temperature value which is an output of a temperature measuring circuit and an integration target value in direct photometry in the development temperature compensating apparatus for the instant camera.

FIG. 14 is a diagram showing a relationship between an integral value during exposure and an integral target value in the development temperature compensating apparatus for the instant camera.

FIG. 15 is a flowchart showing the operation of the instant camera to which the camera information imprinting apparatus of this embodiment is applied.

FIG. 16 is a flowchart showing an operation of an instant camera to which the camera information imprinting apparatus of this embodiment is applied.

FIG. 17 is a flowchart showing the operation of the instant camera to which the camera information imprinting apparatus of this embodiment is applied.

FIG. 18 is a front view showing a display example in the vicinity of a finder, which is an example of the instant camera having a heating sequence for further reducing power consumption.

FIG. 19 is an L of another example of the instant camera including a heating sequence for further reducing power consumption.
It is a front view showing a display example of a CD.

FIG. 20 is equipped with a CPU in an instant camera to which the information copying apparatus for a camera of this embodiment is applied.
It is a chart showing a table for exposure control.

FIG. 21 is a diagram illustrating an instant camera to which the information imprinting device for a camera according to the present embodiment is applied, which is obtained by combining the subject brightness data obtained by pre-photometry and the subject distance data obtained by distance measurement with an FNo. FIG. 6 is a diagram illustrating how to determine

FIG. 22 is a diagram illustrating a modified example of temperature correction in the development temperature compensation device for the instant camera.

FIG. 23 shows a target value to which a pulse signal from a spread photo interrupter corresponds in an instant camera to which the information copying apparatus for a camera of this embodiment is applied.
It is a front view of the photography screen of a film.

[Explanation of symbols]

 1 ... Shooting lens group 2 ... Mirror 3 ... Film pack 4 ... Film 8 ... Sheet type battery 9 ... Minus terminal 10 ... Plus terminal 11 ... Electric circuit 12, 13 ... Spread roller 15 ... Spread photo interrupter 16 ... Photo reflector 17, 18 Destaticizing brush 19 Date imprinting LED 20 Condensing lens 21 Heater 21a Temperature measuring circuit 28 Spread motor 40 AEIC 53a CPU 82 Light blocking member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaharu Hamada, inventor Masaharu Hamada 2-43-2, Hatagaya, Tokyo Olympus Optical Co., Ltd. (72) Inventor Fumio Tomikawa 2-43, Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (5)

[Claims] 1. A film leading edge detecting device for detecting a leading edge of a photographed sheet film, a film feeding means for feeding the photographed sheet film, and a film moving amount in response to an operation of the film feeding means. When a film movement amount detecting means for generating and outputting a corresponding signal and the photographed sheet film are fed, based on the output signal from the film movement amount detecting means, the predetermined information is divided into a plurality of times. An information imprinting device for a camera, comprising: an information imprinting means for imprinting on a film surface. 2. The leading edge detecting means for detecting the leading edge of the photographed sheet film includes a light emitting element that emits light outside the photosensitive region of the sheet film, and a light receiving element that receives transmitted light or reflected light of the emitted light. 2. The information imprinting device for a camera according to claim 1, wherein the information imprinting device comprises a light detecting unit. 3. The information projecting device for a camera according to claim 1, wherein the film feeding means is a pair of rollers for sandwiching the sheet film from both upper and lower sides of the film. 4. The information copying device for a camera according to claim 1, wherein the sheet film is an instant film, and the information copying means is carried out before the developing operation. . 5. The film feeding means sandwiches the sheet film from both upper and lower sides of the film, diffuses the developing solution on the film surface, and feeds the film to the outside of the camera. The information copying apparatus for a camera according to claim 1, wherein the information copying apparatus is a developing roller.