JP2003161991A - Film driving unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera which detects abnormal winding caused when a film leader is put in a spool too much in free winding driving for automatic loading an prevents halfway rewinding due to disengagement between the film and spool. <P>SOLUTION: A film driving unit which has a feed motor 2 and a motor driving means 3 and automatically loads the film is equipped with a motor driving quantity detecting means 4 which counts output pulses corresponding to the driving quantity of the feed motor 2, a perforation detecting means 5 which detects perforations of the film, and a decision means 7 which counts motor driving quantity pulses by motor driving quantity detecting means 4 from the start of driving by the feed motor 2 until the detection of a 1st perforation by the perforation detecting means 5 in automatic film free winding and decides that the automatic loading of the film ends in failure if the number of motor driving pulses is outside a specified pulse range. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic film driving device for feeding a predetermined number of frames after the film is loaded.

[0002]

2. Description of the Related Art Conventionally, there is known a film drive device having an auto loading function of loading a film on a camera cartridge and automatically feeding a predetermined number of frames in the winding direction when the back cover is closed. ing.

In a conventional film driving device, a film cartridge is loaded into a film cartridge storage chamber of a camera, and when the film wound in the film cartridge is pulled out to the vicinity of a spool for winding the film, the back cover is closed. When the loading of the film cartridge and the closing of the back cover are detected, the spool is rotated by a motor to wind up the film.

As shown in FIG. 10, the spool for winding the film is provided with a claw 202 with which the perforation provided on the film meshes with the outer surface of a cylindrical spool 201 which is rotationally driven by a motor. .

A camera 203 having this spool 201
Load the film cartridge 205 into the
FIG. 11 (a) shows a state in which No. 6 is automatically loaded.

That is, the film cartridge 205 is loaded into the camera 203, the perforations of the film 206 are meshed with the pawls 202 of the spool 201 which is rotationally driven, and the film cartridge 205 is wound up on the spool 201 of a predetermined number of frames to automatically load the film. Complete.

[0007]

With the conventional film driving device, the success / failure of the auto-rotation of the film is determined by whether or not a predetermined amount of film has been fed within a predetermined time during the idling operation. is doing.

However, as shown in FIG. 11B, the film 206 is pulled out from the film cartridge 205 loaded in the camera 203, and the pulled film 2
With the tip 206a of the spool 06 inserted into a position deeper than a predetermined position of the spool 201,
When the rotary drive for idling the film is performed, the film 20
The film 206 is wound up with the tip of 6 protruding in the outer peripheral direction of the spool 201, or
As shown in FIG. 11C, the tip of the film 206 may be bent and wound up on the spool 201.

As described above, the state in which the tip of the film 206 is projected in the outer peripheral direction of the spool 201 and the film 206
When a plurality of frames of the wound film 206 are wound up in a state where the front end of the film is bent and wound up, the films 206 for the wound up frames are wound in an oval shape without adhering to the spool 201, and the perforation of the film 206 is changed to the spool 201. The spool 201 may slip off from the claw 202 and the film 206 may not be wound up, and a rewinding operation may occur during shooting.

In the conventional idling drive for automatic loading, the success / failure of the idling at the time of loading the film is determined by whether or not a predetermined number of perforations of the film 206 are detected within a predetermined time. In addition, there is a problem that abnormal winding due to excessive insertion of the leading end of the film 206 onto the spool 201 cannot be detected.

As a countermeasure against this, there is a function to detect the position of the film 206 in the vicinity of the spool 201. However, the structure of the mechanism for detecting the film leading edge becomes complicated, and a film leading edge detecting mechanism is provided in popular products. Costs rise. Further, even if the leading end of the film 206 is excessively inserted into the spool 201, it is conceivable to increase the force for pressing the film 206 so that the film 206 may be wound up in close contact with the spool 201, but scratches may occur when the film 206 is fed. There is also the problem of attaching.

In view of the above-mentioned conventional problems, it is an object of the present invention to provide a film drive device which can reliably detect success / failure of auto-loading by idling at the time of loading a film at low cost.

[0013]

A film driving device of the present invention is a film driving device having a motor for winding a film and a motor driving means for driving the motor, and performing automatic loading when a film is loaded in a camera. There is a motor drive amount output means for outputting a pulse according to the drive amount of the motor, a motor drive amount detection means for counting the output of the motor drive amount output means, and a perforation detection means for detecting the perforation of the film. In the automatic idling after loading the film on the camera, the motor drive amount detecting means counts and counts the pulses of the motor drive amount from the start of driving the motor to the detection and output of the first perforation by the perforation detecting means, The number of pulses of the above motor drive amount is within the specified pulse range. If outside, it is characterized in that anda autoloading unsuccessful and determining means of the film.

Further, the film driving device of the present invention is a film driving device which has a motor for winding the film and a motor driving means for driving the motor, and which performs automatic loading when the film is loaded in the camera,
Perforation detection means for detecting the perforation of the film, timer means for measuring the time until the perforation detection output by the perforation detection means from the start of driving of the motor, and automatic idling after loading the film in the camera The time from the start of driving the motor to the detection and output of the first perforation by the perforation detection means is measured by the timer means, and if the time measured by the timer means is out of the predetermined time range, the automatic loading of the film is not possible. It is characterized by comprising a determination means for determining success.

With the film driving device of the present invention, it is possible to detect and detect the excessive loading of the film by measuring the driving amount or time of the motor that rotationally drives the spool from the start of the idling of the film to the detection of the first perforation. , It is now possible to prevent midway rewinding due to disengagement of the spool claw and perforation during shooting.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the first of the present invention.
3 is a block diagram showing the configuration of the film drive device according to the first embodiment, FIG. 2 is a rear perspective view of the camera using the film drive device according to the first embodiment of the present invention, with the back cover opened, FIG.
4 is a block diagram showing the configuration of a drive control system of a camera using the film drive device according to the first embodiment of the present invention, FIG.
Is a flow chart for explaining the operation of the camera that employs the film drive device according to the first embodiment of the present invention, and FIG. 5 is a flow chart for explaining the idling operation of the film drive device according to the first embodiment of the present invention. FIG. 6 shows the first of the present invention.
3 is a time chart for explaining the idling operation of the film drive device according to the embodiment of the present invention.

As shown in FIG. 1, the film driving apparatus according to the first embodiment of the present invention includes a control means 1 including a microprocessor for performing a plurality of sequence controls for driving and controlling various functions of a camera, and a film. The winding and rewinding feed motor 2 and the motor drive means 3 for controlling the forward / reverse rotation drive of the feed motor 2 based on the control instruction from the control means 1, and the control instruction from the control means 1. On the basis of the motor drive amount detection means 4 for detecting the drive amount of the feeding motor 2 and the control command from the control means 1,
A perforation detecting means 5 for detecting the perforation of the film, and a back lid for detecting the opening / closing of the back lid of the camera such as loading the film cartridge in the camera or taking out the film cartridge, and outputting the detection of the opening / closing of the back lid to the control means 1. Based on the detection unit 6, the drive amount of the feeding motor 2 detected by the motor drive amount detection unit 4, and the perforation of the film detected by the perforation detection unit 5, the successful / unsuccessful idling during film loading. It comprises a judging means 7 for judging success, and a storage means 8 for storing judgment reference data of success / failure of film blank feeding in the judging means 7.

The motor drive amount detecting means 4 counts the number of pulses formed by detecting and forming slits at equal intervals on the circumference of a disk rotating coaxially with the feeding motor 2 by a photo interrupter, and feeding motor. The drive amount of 2 is detected. The perforation detection means 5 is provided on the spool side for winding the film and on the short hub side of the film.

In the film driving apparatus having such a structure, the back cover detecting means 6 detects that the film cartridge has been loaded and the back cover has changed from the open state to the closed state, and the back means of the control means 1 is detected. The lid closing information is transmitted. The control means 1 develops and drives the automatic film loading control sequence based on the back lid closing information from the back lid detection means 6, and drives the feeding motor 2 in the normal direction with respect to the motor drive means 3. Based on the forward drive command of the feed motor 2 from the control means 1, the motor drive means 3 outputs
The feed motor 2 is driven in the normal direction. Along with the normal rotation driving of the feeding motor 2, the control means 1 outputs a driving amount detection command of the feeding motor 2 to the motor driving amount detecting means 4 and also to the perforation detecting means 5. Then, the drive command for detecting the first perforation of the film fed by the feeding motor 2 is output. When the first perforation of the wound film on the short hub side is detected by the perforation detecting means 5 by the forward rotation of the feeding motor 2, the feeding motor 2 detected by the motor drive amount detecting means 4 is detected. The drive amount is output to the determination means 7. This determination means 7 is stored in the storage means 8 and the drive amount (pulse number) of the supply motor 2 output from the motor drive amount detection means 4 at the time when the first perforation is detected by the perforation means 5. Feeding motor 2 for empty film feed
Within a predetermined drive area amount (pulse number), the drive amount of the feeding motor 2 is a predetermined drive area value (predetermined pulse area).
If it is within the range, it is determined that the idling, which is the automatic loading of the film, is successful, and if it is determined that the film is outside the predetermined driving region value (predetermined pulse region), the automatic loading is determined to be unsuccessful.

Next, with reference to FIG. 2, a mechanical structure of a camera adopting the above-mentioned film driving device will be described.

A back cover 16 is provided on the back side of the camera 11 using the film driving apparatus of the present invention. One end of the back cover 16 is attached to the camera 11 so as to be openable and closable, and the other end is provided with a protrusion 17. The protrusion 17 of the back cover 16 is adapted to be fitted and inserted into the back cover fixing groove 18 provided on the back surface of the camera 11. Further, a cutout 17b is provided substantially in the center of the protrusion 17 of the back cover 16, and the cutout 17b is formed.
Is adapted to be engaged and fixed from the side surface of the camera 11 with a back cover fixing tool 19 provided in the back cover fixing groove 18.
That is, when the engagement between the back lid fixing tool 19 and the notch 17b of the protrusion 17 of the back lid 16 is released, the back lid 16 can be opened. Furthermore, in the back side fixing groove 18,
A back lid opening / closing switch 18a which is pressed and turned on by the protrusion 17 of the back lid 17 which is the back lid detecting means 6 is provided.

Inside the back surface of the camera 11 with the back cover 16 opened, a film cartridge chamber in which the film cartridge 12 is loaded, and a spool 14 for winding up the film 13 drawn from the film cartridge 12 are arranged.

A film 13 pulled out from the film cartridge 12 and wound up on the spool 14.
A photo reflector (hereinafter abbreviated as WPR) 15, which is the perforation detecting means 5 for detecting the perforation 13a on the short hub side of the film 13 on the spool 14 side of the feeding path of the above, is provided. A finder eyepiece 20 for visually recognizing a field is provided on the upper rear surface of the camera 11. Also, the camera 1
A release button 22, a zoom up / down button 23, and a display LCD 24 are provided on the upper surface of 1. The release button 22 performs a photometry and distance measurement operation (not shown) in the half-pressed state, and drives an aperture and a shutter (not shown) in the deep-pressed state to expose the subject image on the film 13. The zoom up / down button 23 is for changing the focal depth of the photographing lens provided on the front surface of the camera 11. Display LCD 2
4 is the number of shooting frames of the film 13, various shooting modes,
It is a liquid crystal display panel that displays additional information such as date and time, and a battery check status.

Next, the structure of the drive control system of the camera using the film drive device according to the present invention will be described with reference to FIG.

A microprocessor (hereinafter referred to as CPU) 31 corresponding to the control means 1 controls various operations of the camera in sequence, for example, the taking lens 21.
Focus / auto exposure (hereinafter referred to as AF / AE) calculation for driving and controlling the focus and aperture of the
It is responsible for D conversion, drive control of the display LCD, LED control for various displays, and control for various switches.

The CPU 31 uses the bus 36 to perform EEPRO.
The M35 and the AF-IC34 are connected. EEPR
The OM 35 is an electrically erasable read-only memory (ROM), which includes information on the number of frames of the film 13 and the taking lens 2
It stores various information such as zoom position information of No. 1, strobe charging voltage information, and battery check information. A
The F-IC 34 is an IC for AF distance measurement, and is the CPU 31.
The subject distance is obtained under the control of.

The display LCD 2 is provided in the CPU 31.
4. LCD panel 32, switch operation unit 33, IF
-The IC 37, the strobe unit 51, a DX code detector (not shown), etc. are connected.

The switch operating section 33 operates when the release button 22 is half-pressed, and the AF / AE
First-stage switch 1R for driving the shutter and release button 2
2 When it is pressed deeply, it operates to drive the shutter 2
Step switch 2R, a shooting mode switch for selectively setting various shooting modes of the camera, and a zoom-up switch that is turned on when the zoom-up / down 23 is operated to zoom-up to zoom up the shooting lens 21. ZUP, a zoom down switch ZDN which is turned on when operated to the zoom down side, a flash selection switch for selectively setting the flashing state of the strobe of the camera, and a self switch for selectively setting a remote control and a self-timer function, A date switch for changing the setting of date and time information and a display changeover, a power switch for turning on / off the driving power source of the camera, a rewind switch for forcibly rewinding the film 13 being photographed, and the fact that the back cover 13 is closed. Back cover open / close switch 18 for detecting and feeding in blank
a and the like.

The IF-IC 37 is an IC for interfacing control signals exchanged between the CPU 31 and the LED display section 38, photometric element 39, motor driving IC 40, and various detection sensors 46 to 50, which will be described later. Is.

The strobe unit 51 includes the CPU
When the charging signal is given from 101, the charging of the battery is started, and the charging voltage of the battery is sequentially sent to the CPU 31 and A / D converted, and then compared with the charging voltage information stored in the EEPROM 35 to complete the charging. Is checked. Further, according to the strobe mode set by the switch operation unit 33, strobe light is projected onto the subject.

The above DX code corresponds to the film cartridge 1
CP is a code that indicates the film speed described in 2.
The exposure value is calculated from the DX value read in U31 and the brightness of the subject measured by the photometric element 39.

The LED display section 38 is a display section for notifying the photographer of a flash emission warning, AF lock and the like.

The photometric element 39 is an element for detecting the brightness of an object, and AE control is performed based on the photometric value detected by the photometric element 39.

The IF-IC 37 has an LED display section 3
8 is configured by an LED drive circuit for driving and controlling 8, a photometric circuit for driving the photometric element 39 to perform photometry, a motor drive drive circuit, a reference voltage circuit, and the like.

The motor driving IC 40 is a film 1
A motor (hereinafter referred to as a W / Z motor) 41 for winding and rewinding 3 and zooming up / down of the photographing lens 21 (corresponding to the feeding motor 2 in FIG. 1), and focus adjustment of the photographing lens 21. A motor (hereinafter referred to as an LD motor) 42, a shutter plunger 43, and the above W / Z
A film winding / rewinding plunger 44 for switching the motor 41 between film winding / rewinding and zooming up / down driving of the taking lens 21 is connected.

That is, the motor drive IC 40 receives the drive control signal supplied from the CPU 31 from the IF-IC.
Based on the control signal decoded by 37, the W / Z motor 4
1, an LD motor 42, a shutter plunger 43, and a winding / zooming switching plunger 44.

When the W / Z motor 41 is switched to the winding side by the winding / zoom switching plunger 44, the WPR which is the perforation detecting means 5 for detecting the perforation of the film 13 is detected.
46 is driven, and the perforation detection signal is supplied to the CPU 31 via the IF-IC 37.

The WZ motor 41 is switched to zoom drive by the winding / zoom switching plunger 44.
The detection output of the photo-reflector for zoom position detection (hereinafter referred to as ZPR) 45 for detecting the position of the photographing lens 21 when the photographing lens 21 is zoom-driven is the above C.
It is supplied to the PU 31.

A photo interrupter, which is the motor drive amount detecting means 4 for detecting the drive amount of the motor in conjunction with the rotational drive of the W / Z motor 41 (denoted as motor PI in the figure).
47 are provided. As described above, the motor PI 47 generates a pulsed detection signal by the slits provided coaxially with the W / Z motor 41 and arranged at equal intervals in the circumferential direction of the disk.

A photo interrupter (designated as LDPI in the drawing) 48 for generating an output signal in association with the rotation of the LD motor 42 is provided, and the shutter plunger 43 drives the photometric element 39 to perform photometry. A photo interrupter that opens and closes the sector of the shutter according to the brightness of the subject and detects the open / closed state of the sector (AEPI in the figure)
49 is provided, and the winding / zoom switching plunger 44 is provided with a photo interrupter (clutch in the figure) for detecting a switching state between a film winding / rewinding mode and a zooming up / down mode of the taking lens 21. 50). Those WP
R46, motor PI47, LDPI48, AEPI4
9, the detection output of the clutch PI49 is IF-I, respectively.
It is supplied to the CPU 31 via C37, and based on the respective detection outputs, the CPU 31 causes the W / Z motor 41, the LD motor 42, the shutter plunger 43, and the winding / winding /
A drive control signal for each of the zoom switching plungers 44 is generated and supplied.

The CPU 31 of the camera 11 having such a configuration
The operation of the power-on reset sequence will be described with reference to FIG.

When the camera 11 is loaded with a battery, which is a battery, the CPU 31 is reset and the operation is started.

In step S1, the CPU which is the initial setting is set.
Initialization of each port and RAM in 31 is performed. Next, in step S2, the CPU 31 drives a battery check function (not shown) to check the battery state loaded in the camera, and if the battery voltage is insufficient,
After the display without the battery is displayed on the LCD panel 32 for a predetermined time, the operation of the camera 11 is prohibited.

If it is determined as a result of the battery check in step S2 that the battery voltage is sufficient, the photographing mode sequence stored in the EEPROM 35 is read and developed in the RAM of the CPU 31 in step S3.

Next, in step S4, the CPU 31 sets the IF-IC 3 to initialize the mechanical function of the camera 11.
7 and the motor driving IC 40, the W / Z motor 41 is driven, and the winding / zoom switching plunger 44 is switched to drive the W / Z motor 41.
Drive rotation is switched to the zoom side,
Drive to the retracted position.

Next, in step S5, the CPU 31 determines whether or not the power switch of the switch operating section 3 is turned on, and when it is determined that the power switch is off,
Step S9 and subsequent steps are executed.

If it is determined in step S5 that the power switch is turned on, the CPU 31 determines in step S6.
Drives the LCD panel 32 to perform LCD ON control for displaying the number of film frames, the set shooting mode, the date and time, etc., and also starts a timer built in the CPU 31.

Next, in step S7, the CPU 31 sends W / W through the IF-IC 37 and the motor driving IC 37.
The Z motor 41 is driven to rotate and the above-mentioned winding /
The zoom switching plunger 44 is switched to the zoom side to drive the taking lens 21 from the retracted position to the wide position which is the initial shooting position.

When the driving of the taking lens 21 to the wide position in step S7 is completed, the CPU 3 operates in step S8.
1 determines to the strobe unit 51 the state of charge of the charging capacitor for charging the stroboscopic light emission drive power source, and drives the strobe unit 51 to charge if the charge voltage is insufficient, and if the charge voltage is sufficient, the step S9 The operation states of various switches of the switch operation unit 33 are read.

If it is determined in step S10 that the power switch is off, steps S17 and thereafter are executed,
If it is determined that the power switch is on, it is determined in step S11 that the state of the release switch has changed, and if it is determined that the state of the release switch has changed, then in step S12, the operation sequence of the release switch is expanded and The photographing operation is performed based on the release operation sequence, and when the drive of the release operation sequence ends, the process returns to step S9.

If it is determined in step S11 that the state of the release switch has not changed, step S13
If it is determined that the state of the zoom switch has been changed and that the state of the zoom switch has been changed, step S14
The zoom operation sequence of the taking lens 21 is developed with
The photographic lens 21 is zoom-driven based on the zoom operation sequence, and when the drive of the zoom operation sequence is completed, the process returns to step S9.

If it is determined in step S13 that the zoom switch has not changed state, step S15
In step S16, if it is determined that the state of the shooting mode switch has changed, and if it is determined that the state of the shooting mode switch has changed, the sequence of the shooting mode that has changed the state is developed in step S16, the shooting mode is set, and the shooting mode When the setting is completed, the process returns to step S9.

If it is determined in step S15 that the photographing mode switch has not changed state, step S1
In step 7, if it is determined that the state of the rewind switch has changed, and if it is determined that the state of the rewind switch has changed, the film rewind operation sequence is developed in step S18, and W /
The reverse rotation of the Z motor 41 and the winding / zooming switching plunger 44 are switched to the winding side to drive the film 13 for rewinding. When the rewinding operation is completed, the process returns to step S9.

When it is determined in the above step S17 that the state of the rewanide switch has not changed, step S1
At 9, it is determined that the state of the back cover switch 18a has changed, and if it is determined that the state of the back cover switch 18a has changed, then at step S20, it is determined whether the back cover 18 is open.
When it is determined in step S20 that the back cover 18 is in the open state, the sequence of processing of the open state of the back cover 18 is developed and executed in step S52, and the back cover 18 is closed in step S20. If it is determined that step S
At 22, it is determined that the film cartridge 12 has been loaded into the camera 11, and the film 13 idle feed processing sequence that is the automatic loading of the film 13 is executed. When the driving based on the sequence of the back cover opening process of step S21 or the film idling process of step S22 is completed, the process returns to step S9.

In step S19, the back cover switch 18
If it is determined that the state of a has not changed, step S2
In 3, it is determined whether the power switch is off. If it is determined that the power switch is off, step S24.
Then, an operation sequence for driving the taking lens 21 to the retracted position is developed, and the taking lens 21 is moved down based on the taking lens moving sequence, and when the driving of the moving sequence of the taking lens 21 is completed, steps S26 and thereafter are executed. To be executed.

If it is determined in step S23 that the power switch is on, the CPU 31 operates in step S25.
Determines whether the timer started in step S6 has passed a predetermined time. If the predetermined time has not passed, the process returns to step 9 and if the predetermined time has passed, the LCD panel 32 of the LCD panel 32 is checked in step S26. The drive is turned off, and the stop process of the CPU 21 is performed in step S27. This stop processing is for avoiding the consumption of the battery, and when the power switch or other switches are operated, the CPU 31 permits the interrupt so that the step S5 and subsequent steps can be executed from the stopped state. is there.

Next, the idling process in step S22 will be described with reference to FIGS. Step S31
Then, the CPU 31 uses the IF-IC 37 and the motor driving IC 4
0, the winding / zoom switching plunger 44 is switched to winding, and when the clutch PI 50 confirms and detects the switching of the winding / zoom switching plunger 44 to winding, the number of perforations to be fed in step S32 is set. Initial settings such as forward drive voltage setting of the W / Z motor 41, WPR46 drive setting, motor PI47 threshold level setting, motor PI47 count start, and idle feed time measurement timer setting are performed.

When the initialization is completed in step S32, the CPU 33 in step S33 uses the IF-IC 37 and the motor driving IC 40 to set W / Z at the drive voltage of the W / Z motor 41 initialized in step S32. The Z motor 41 is driven in the normal direction (FIG. 6A).

When the W / Z motor 41 is driven in the normal direction, a pulse corresponding to the rotation amount of the W / Z motor 41 is output from the motor PI 47 to the IF-IC 37 as shown in FIG. 6B.
Is output to the CPU 31 via. CPU 31
Is the W / Z motor 4 output from this motor PI47.
The pulse indicating the drive amount of 1 is started in step S34. Next, in step S35, the W / Z motor 31 is driven in the normal rotation for the idle feed, and the timer of the CPU 31 starts counting up.

When the timer count-up in step S35 is started, in step S36, the CPU 31
It is determined whether or not a predetermined time has elapsed from the start of the timer count-up, and if the predetermined time has elapsed, it is determined that the film is not wound around the spool 14, and step S44 and subsequent steps are executed.

When it is determined in step S36 that the predetermined time has not elapsed, the CPU 31 determines in step S37.
It is determined whether or not the first perforation 13a of the film 13 is detected by the WPR 46 (see FIG.
As shown in (4), since the film 13 is provided on the short hub side, idling is started to determine whether or not the first perforation 13a on the short hub side is detected. This step S
As a result of the detection determination of the first perforation 13a at 37, if it is determined that the first perforation 13a is not detected, the process returns to the step S34, and if the first perforation 13a is detected, the step S3 is performed.
In step 8, the motor P started to count in step S34 described above.
The number of pulses output from I47 indicating the drive amount of the W / Z motor 41 is recorded and stored until the first perforation 13a in step S37 is detected.

Next, in step S39, the CPU 31 determines whether the number of pulses from the motor PI 47 recorded and stored in step S38 is within a predetermined number of pulses. That is, the pulse detected by the motor PI 47 from the forward rotation drive of the W / Z motor 41 for starting the idling of the film 13 is WPR46.
If the number of pulses until the first perforation 13a of the film 13 is detected is within a predetermined value (see FIG. 6).
In the case of the range of the area B shown in (c)), it is determined that the idling for auto loading is successful.

The motor PI 47 at the time when the first perforation 13a detected by the WPR 46 is detected.
When the number of pulses indicating the drive amount of the W / Z motor 41 detected in step A is smaller than the area B as shown in FIG. 6D, when the back cover 16 is opened and the film 13 is set, When the tip of 13 is put too much into the spool chamber, the WPR 46 is covered with the film 13, the W / Z motor 41 is driven, and at the same time, the perforation 13a is caught by the claw of the spool 14 and the film 13 is fed. At about the same time, the perforation detection signal changes at the WPR 46. As described above, this is a factor that the film wound on the spool 14 is deformed or the leading end of the film 13 is bent, and thus it is determined that the idling is unsuccessful.

The motor P at the time when the first perforation 13a detected by the WPR 46 is detected.
As shown in FIG. 6E, in the case where the number of pulses indicating the drive amount of the W / Z motor 41 detected in I47 is larger than the area B, the film is similar to the case of the area A described above. 13 is in the spool chamber too much, but spool 1
Since the film 13 is wound in a dull state with respect to No. 4, it takes a long time to feed the film 13 without the perforations 13a being easily caught by the spool claws.

That is, the distance between the leading edge of the film 13 and the position of the first perforation 13a is constant,
When the film 13 is loaded in the normal position and the W / Z motor 46 is rotationally driven, the spool claw is caught by the perforation on the long hub side of the film, film feeding is started, and the short hub of the film 13 detected by the WPR46 is started. The pulse detected by the motor PI 47 up to the detection time of the first perforation 13a on the side is within a predetermined pulse number range. Therefore, if the count value of the motor PI 47 from the start of the idling to the output of the first perforation 13a is not the number of pulses within the predetermined area, the film 1
It is determined that the loading error is No. 3, and step S44 and subsequent steps are executed.

When it is determined in step S39 that the first detection of the perforation 13a is within the predetermined pulse number range which is the autoload success determination region B, the CPU 31 determines in step S40 that the WPR 46 detects the step S37. First perforation 1 detected in
The perforations 13a after 3a are counted.
This is a process for feeding the first photographed frame of the film 13. Next, in step S41, the CPU 31
Continues counting up the timer counted in step S35, determines in step S42 whether the time of the timer has exceeded a predetermined time, and if it is determined that the time has exceeded the predetermined time, the first shooting frame is determined. Even if the idling up to is not completed, step S44
The subsequent steps are executed.

If it is determined in step S42 that the predetermined time has not been exceeded, the CPU determines in step S43.
31 determines whether or not a predetermined number of perforations 13a up to the first shooting frame after the detection of the first perforations 13a in step S37 has been detected, and if it is determined that the predetermined perforation number has not been detected, the above steps are performed. Returning to S40, when it is determined that the predetermined number of perforations is detected, the CPU 31 determines in step S44 that the IF-IC 37 and the motor driving IC 40 have been detected.
The W / Z motor 41 is braked to stop the rotation drive of the motor via the
1 is W / Z of the IF-IC 37 and the motor driving IC 40
The drive control of the motor 41 is turned off.

After the drive of the W / Z motor is turned off in step S45, the CPU 31 controls the film 13 in step S46.
It is determined whether or not the blank feed of is completed normally. If the blank feed is successful, the blank feed success flag is set in step S47, and the blank feed success information is written to the EEPROM 35. If it is determined in step S46 that the blank feeding is unsuccessful, the blank feeding unsuccessful flag is set in step S48, and the blank feeding unsuccessful information is stored in the EEPROM 35.
Write in. When the step S47 or S48 is finished, the idling process is finished.

Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a block diagram showing the basic structure of a film drive device according to another embodiment of the present invention, FIG. 8 is a flow chart for explaining the idling operation of another embodiment of the present invention, and FIG. 9 is another embodiment of the present invention. It is a time chart explaining operation | movement of a form.

The film driving apparatus according to the embodiment of the present invention is
Control means 101 comprising a microprocessor for performing a plurality of sequence control of various driving functions of the camera,
A film driving / rewinding feeding motor 102 and a motor driving means 10 for controlling forward / reverse rotation driving of the feeding motor 102 based on a control command from the control means 101.
3, a timer count means 104 for measuring the drive time of the feeding motor 102 based on the control command from the control means 101, and a perforation of the film is detected based on the control command from the control means 101. The perforation detection means 105, the back lid opening / closing means 106 for detecting the opening / closing of the back lid of the camera such as loading the film cartridge in the camera or taking out the film cartridge, and outputting the back lid opening / closing detection to the control means 101; Based on the predetermined time counted by the timer counting means 104 and the perforation of the film detected by the perforation detecting means 105, the judging means 107 for judging the success / failure of the idling at the time of loading the film, and the judging means 107. Record the criteria data for successful / unsuccessful film skipping in It consists storage means 108.

The above-mentioned perforation detection means 1
05 is provided on the spool side for winding the film,
Moreover, it is provided on the short hub side of the film.

In the film driving apparatus having such a structure, the back lid detecting means 106 detects that the film cartridge has been loaded and the back lid has changed from the open state to the closed state. The lid closing information is transmitted. The control means 101 develops and drives the automatic film loading control sequence based on the back lid closing information from the back lid detection means 106, and drives the feeding motor 102 in the normal direction with respect to the motor drive means 103. Based on the forward rotation driving command of the feeding motor 2 from the control means 101, the motor driving means 103 causes the feeding motor 10 to output.
2 is driven in the normal direction. Along with the normal rotation driving of the feeding motor 102, the control means 101 outputs a timer count start command to the timer counting means 104, and also feeds the feeding motor to the perforation detection means 105. In step 102, a detection drive command for the first perforation of the film that has been idly fed is output.
The forward rotation of the feeding motor 102 causes the determination means 107 to determine the timer value counted by the timer count means 104 when the first perforation on the short hub side of the film wound up is detected by the perforation detection means 105. Is output to. This determination means 107
Is the timer time output from the timer count means 104 at the time when the first perforation is detected by the perforation means 105 and the storage means 10.
Feed motor 1 stored in No. 8 for film skipping
It is determined whether or not it is within the predetermined drive time 02. That is, when the feeding motor 12 is driven to rotate and the perforation of the film is detected by the perforation detecting means 105 within a predetermined time, it is determined that the auto-loading of the film, that is, the idling is successful, and the detection of the perforation is predetermined. If it is determined that the time is other than the time, it is determined that the auto-loading has failed.

The timer counting means 104 is
The timer function built in the control means 101 is used. The structure of the drive control system of the camera using this film drive device is basically the same as that shown in FIG.

The operation of the automatic idling, which is the automatic loading of the film, of the film driving apparatus having such a structure will be described with reference to FIGS. 8 and 9.

In step S101, the control means 101 sets the feeding motor 102 to a state in which the film can be wound up via the motor driving means 103. This feeding motor 1
02 is generally used not only for film winding / rewinding, but also for zooming up / down driving of the taking lens. For this reason, during automatic idling, the feeding motor 10
The rotational driving force of 2 is switched and set by a plunger or the like so that it can be transmitted to the film winding spool.

Next, in step S102, the number of perforations to be fed idly is set, the forward rotation drive voltage of the feed motor 102, the drive setting of the perforation detection means 105, the threshold level of the feed motor 102, and the feed motor 102 are set. The initial settings such as the start of counting, the setting of the measurement timer for the idle feed time, etc. are performed.

Upon completion of the initial setting in step S102, the control means 101 controls the motor drive means 103 in step S103 with the drive voltage of the feed motor 102 initialized in step S102.
2 is driven in the normal direction (FIG. 9 (a)).

When the feeding motor 102 is driven in the normal direction, the control means 101 drives the perforation detection means 105 in step S104 to drive the perforation detection of the film, and is also incorporated in the control means 101. Start counting up the timer.

When the timer count-up is started in step S104, the control means 1 is operated in step S105.
01 counts up the timer and determines in step S106 whether a predetermined time has elapsed. If the time counted up by the timer has passed a predetermined time, it is determined that the film is not wound around the spool, and the steps from S114 are executed.

If it is determined in step S106 that the predetermined time has not elapsed, the control means 1 is operated in step S107.
01 determines whether or not the first perforation of the film is detected by the perforation detecting means 105 (as described above, the perforation detecting means 105).
Since it is provided on the short hub side of the film, it starts idle feed and determines whether or not the first perforation on the short hub side is detected. As a result of the perforation detection determination in step S107, when it is determined that the perforation is not detected, the process returns to step S105, and when the perforation is detected, the step S1 is performed.
In step 08, the count value of the timer started in step S104 is recorded and stored as the timer value at the time when perforation is detected in step S107.

Next, in step S109, the control means 101
Determines whether the timer value at the time of perforation detection recorded and stored in step S108 is within a predetermined time. That is, the feeding motor 102 for starting the film idling
If the time from the normal rotation drive to the detection of the first perforation of the film is within the predetermined value (Fig. 9 (b))
In the case of the area B ′ range shown in (1), it is determined that the idling for auto loading is successful.

When the time of the timer at the time when the first perforation detected by the perforation detecting means 105 is detected is the area A'less than the area B'as shown in FIG. 9C, the back cover detection is performed. When the film is loaded by the means 106 and the closing of the back cover is detected, the leading end of the film is placed too much in the spool chamber, and the first perforation is covered with the film. When the first perforation is caught on the spool claw and the film is fed at the same time as the driving, the perforation is detected almost at the same time and the perforation signal changes. This is because the film wound on the spool described above is deformed or the leading end of the film is bent, so it is determined that the idling is unsuccessful.

Also, the perforation detection means 1
As shown in FIG. 9D, the timer count value at the time when the first perforation is detected in 05 is larger in the area C ′ than in the area B ′, as in the case of the area A ′. Is put in the spool chamber too much,
Since the film is wrapped around the spool in a dull condition, it took time for the film to be fed without the perforations catching on the spool claws.

That is, the distance between the leading edge of the film and the position of the first perforation is constant, and when the film is loaded in the normal position and the feeding motor 102 is rotationally driven, the spool claw is caught in the perforation of the film. The film feeding time from the start of film feeding until the first perforation detection on the short hub side of the film is within a predetermined time range. Therefore, if the time from the start of the idling to the output of the perforation is not within the predetermined area, it is determined that the film is loaded incorrectly, and step S114 and subsequent steps are executed.

When it is determined in step S109 that the timer count value up to the first perforation detection is within the autoload success determination area B ', the control means 101 in step S110 detects the first count detected in step S107. Count perforations after perforation. This is a process for feeding up to the first filmed frame of the film. Next, step S
In step 111, the control means 101 continues to count up the timer started in step S104, and in step S112, it is determined whether the time of the timer has exceeded a predetermined time, and it is determined that the predetermined time has been exceeded. Even if the predetermined blank feed is not completed, step S114 and subsequent steps are executed.

When it is determined in step S112 that the predetermined time has not been exceeded, the control means 101 determines in step S113 whether or not a predetermined number of perforations have been detected after the first perforation detection in step S107, and the predetermined perforation is detected. If it is determined that the number of perforations is not detected, the process returns to step S110. If it is determined that the predetermined number of perforations is detected, the control unit 101 brakes the feeding motor 102 in step S114. The rotation drive of the feed motor 102 is stopped, and then, in step S115, the control means 1
01 turns off the drive control of the feeding motor 102.

Feed motor 102 in step S115
After the driving off of, the control means 101 in step S116
It is judged whether or not the film jump is completed normally. If the blank feed is successful, the blank feed success flag is set in step S117, and the blank feed success information is set to the control means 101.
To the EEPROM. In addition, the above step S11
If it is determined in step 6 that the blank feed is unsuccessful, step S
At 118, the idling unsuccessful flag is set, and the idling unsuccessful information is written in the EEPROM of the control means 101.
When step S117 or S118 is completed, this idling process is ended.

As described above, the film driving apparatus of the present invention is provided with the perforation detecting means provided on the short hub side of the film to detect the perforation, and the film is loaded into the camera to feed the film. When the feed motor is driven and the film is wound on the spool, the rotational drive amount of the feed motor until the first perforation is detected by the perforation detection means or the time is measured, and the rotational drive amount of the feed motor is measured. , Or, if the time is within a predetermined range, it is determined that the film has been successfully fed, and if the rotation drive amount of the feeding motor, or if the time is outside the predetermined range, it is determined that the film has not been successfully fed. It is possible to display a warning message that the film is reloaded, and the engagement between the film and the spool claw is released during shooting. Rewind the middle by it has become possible to prevent in advance.

[0089]

The film drive device of the present invention is the first to be provided on the short hub side of a film during automatic loading, which is automatic idling for loading a film into a camera and feeding a predetermined frame. Drive amount of the film feed motor to detect the perforation of
By measuring the drive time of the film feed motor and comparing the measured drive amount of the feed motor or the drive time with a predetermined value, automatic operation is performed when the leading edge of the film is placed too much into the spool chamber of the camera. Successful / unsuccessful idling can be reliably determined with a simple structure. Deformation of the winding film due to excessive insertion of the film leading end into the spool chamber, or half-winding due to detachment of the spool and film during winding. It has the effect of preventing the return.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a film driving device according to a first embodiment of the present invention.

FIG. 2 is a rear perspective view of the camera using the film driving apparatus according to the first embodiment of the present invention in an open state of the back cover.

FIG. 3 is a block diagram showing a configuration of a drive control system of a camera using the film drive device according to the first embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation of a camera using the film driving device according to the first embodiment of the present invention.

FIG. 5 is a flowchart illustrating an automatic idling operation of the film driving device according to the first embodiment of the present invention.

FIG. 6 is a time chart illustrating an automatic idling operation of the film driving device according to the first embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a film driving device according to another embodiment of the present invention.

FIG. 8 is a flowchart illustrating an automatic idling operation according to another embodiment of the present invention.

FIG. 9 is a time chart explaining an automatic idling operation according to another embodiment of the present invention.

FIG. 10 is a perspective view showing a spool used in a conventional camera.

FIG. 11 is an explanatory diagram illustrating a problem of a conventional camera.

[Explanation of symbols]

1 ... Control means 2 ... Feed motor 3 ... Motor driving means 4 ... Motor drive amount detecting means 5 ... Perforation detection means 6 ... Back cover detecting means 7 ... Judgment means 8 ... Storage means

Claims (2)

[Claims] 1. A film driving device having a motor for winding a film and a motor driving means for driving the motor, wherein the film driving device performs automatic loading when a film is loaded in a camera, and a pulse is generated according to a driving amount of the motor. The motor drive amount output means for outputting, the motor drive amount detection means for counting the output of the motor drive amount output means, the perforation detection means for detecting the perforation of the film, and the automatic idling after the film is loaded into the camera. , The motor drive amount detecting means counts the pulses of the motor drive amount from the start of driving the motor to the detection and output of the first perforation by the perforation detecting means, and the number of pulses of the motor drive amount is outside the predetermined pulse range. In the case of, Film drive, characterized by comprising a determination unit and ring unsuccessful, the. 2. A film driving device having a motor for winding a film and a motor driving means for driving the motor, which performs automatic loading when a film is loaded in a camera, wherein perforation detection detects perforation of the film. Means, a timer means for measuring the time from the start of driving the motor until the perforation is detected and output by the perforation detecting means, and the automatic perforation after the film is loaded into the camera, the perforation detection is started from the start of the motor. The time until the first perforation is detected and output by the means is measured by the timer means, and when the time measured by the timer means is out of the predetermined time range, the determination means that determines that the auto-loading of the film is unsuccessful, Specially equipped And a film driving device.