JP2002350962A - Film feeding device for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a problem that detection and recognition at the time of succeeding in autoloading are insufficiently made in the feeding and autoloading of film from a film cartridge. SOLUTION: This film feeding device is constituted of a sprocket 9 to feed the film to a take-up spool, a spool shaft 22 to take up the film reaching the take-up spool and a motor sensor 30 to detect a detected signal from a perforation sensor 29 by which the moving amount of the film is detected because the feeding speed of the film by the spool shaft 22 is higher than that of the film by the sprocket 9 and the rotational amount of a motor by which at least the spool shaft 22 is driven, the feeding speed of the film is obtained from the rotational amount of the motor obtained by the motor sensor 30 to a fixed film moving amount meaning whether fed film reaches the spool shaft 22 or not obtained in specified timing from the perforation sensor 29, and it is discriminated as the success of loading at the point of time when the feeding speed becomes same.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeder for a camera using 135 format film.
More specifically, the present invention relates to automatic loading of a camera which feeds out a roll-shaped film stored in a film cartridge loaded in a camera and winds up the fed-out film.

[0002]

2. Description of the Related Art Conventionally, a film is wound and a leader portion of the film is projected from a film feed port.
2. Description of the Related Art A camera having an auto-loading function in which a 5-format film cartridge is loaded, a film is sent out to a take-up spool, and the film that has reached the take-up spool is taken into practical use.

In a camera having an automatic film loading function, a film sent from a film cartridge is not taken up by a take-up spool.
Autoloading failure may occur.

A camera which eliminates this failure of auto loading is disclosed in JP-A-6-123912.

In the camera disclosed in this publication, the speed at which the film arrives at the take-up spool is made higher than the speed at which the film is fed from the film cartridge to the take-up spool. Autoloading is used.

[0006]

The above-mentioned JP-A-6-123
The auto-loading of the camera disclosed in Japanese Patent Publication No. 912 eliminates a loading failure such that the fed film is clogged on the way and does not reach the take-up spool, and the fed film is not wound on the take-up spool. If the loading fails, the number of reloads is limited according to the state of use of the film.

However, there is no disclosure about the detection of success when auto-loading has succeeded by feeding a film from the film cartridge, and there has been a problem that detection recognition when auto-loading is successful is insufficient.

In view of the above problems, the present invention provides a film feeder for a camera which detects the success of auto-loading in which a film sent from a film cartridge is taken up by a take-up spool, and enables a quick photographing operation. The purpose is to do.

[0009]

According to the present invention, there is provided a film feeding apparatus for a camera, comprising: sending means for feeding a film toward a take-up spool; and a winding means for winding the film reaching the take-up spool by the take-up spool. Means of taking,
In a film feeding apparatus for a camera, in which the film feeding speed by the winding means is higher than the film feeding speed by the feeding means, a film moving distance detecting means for detecting the moving distance of the film; A motor rotation amount detection unit that outputs a pulse signal in accordance with at least a rotation amount of a motor that drives the winding unit; and a determination unit that determines whether the fed film has reached a spool. When the determination means determines that the film has reached the spool, the automatic loading of the film is determined to be successful.

Further, the determination means of the film feeder for a camera according to the present invention is provided by the motor rotation amount detection means for a fixed film movement amount obtained at a predetermined timing from the film movement amount detection means. It is characterized in that a motor rotation amount is measured and a film feeding speed is obtained.

Further, the criterion of the determining means of the film feeding apparatus for a camera according to the present invention is that whether or not the film feeding speed becomes equal to the film feeding speed by the winding means during the feeding operation. It is characterized in that it is determined according to

According to the present invention, the film is sent out from the film cartridge to the take-up spool by the film sending means,
When the film is wound by the winding device that drives the winding spool at a higher speed than the film sending device, the amount of movement or feeding speed of the film matches the rotation amount detected by the motor rotation amount detecting device. By judging, the successful detection of autoloading can be more reliably detected.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a film feeding function of a camera according to the present invention, and FIG. 2 is a rear view showing an internal configuration of the camera according to the present invention.

As shown in FIG. 2, when the back cover (not shown) of the camera body 1 is opened, a film cartridge 2 (to be described later) is provided inside the camera body 1 on the right side in the figure.
A patrone chamber 3 for storing therein (see FIG. 1) is formed. A fork member 25 is rotatably disposed at one end inside the film cartridge chamber 3. The fork member 25 is fitted to a film winding shaft of the film cartridge 2.

A sprocket 9 is provided near the patrone chamber 3. The sprocket 9 sends out a film (not shown) drawn from the inside of the film cartridge 2 loaded in the cartridge chamber 3 to a spool chamber 24 described later. Has a claw portion 9b that meshes with the perforation of the film contained in the film cartridge 2.
And serves as a sending means (loading means) for the film 2.

The fork member 25 of the patrone chamber 3 and the sprocket 9 are rotated as required by the rotational driving force of a motor 23 (see FIG. 1) serving as a driving source of a film feeding mechanism described later. Is configured.

A spool chamber 24 is provided on the left side of the camera body 1 in the figure, and a spool shaft 22 is disposed in the spool chamber 24. The spool shaft 22 is a winding means for winding and winding a film drawn from the inside of the film cartridge 2 loaded in the cartridge chamber 3, and has a motor 23 described later incorporated therein.

The patrone chamber 3 and the spool chamber 24
The opening 81 for photography is formed, and near the upper end edge and the lower end edge of the opening 81 for photography,
Film rails 8 each forming a film traveling path
2a and 82b are formed.

A perforation sensor (P sensor) 29 for detecting the perforation of the film is arranged at a predetermined position near the spool chamber 24 on the film rail 82a at the upper edge. In addition,
From the film rail 82a at the upper edge, the patrone chamber 3
The claw portion 9b of the sprocket 9 is disposed on an extension line extending toward the side of.

Further, on the back side of the camera body 1, a finder eyepiece 6 is provided. The finder eyepiece 6 is used by a photographer to confirm a subject captured by a photographic lens 5a described later, and has the same configuration as that employed in a conventional general small camera. Although the camera body 1 has various functions other than those described above, it is an element that is not directly related to the present invention, and a detailed description thereof will be omitted.

Next, the internal structure of the camera of the present invention will be described with reference to FIG. It should be noted that only the configuration relating to the film feeding device of the present camera is shown, and the description of other configurations not related to the present invention is omitted.

The driving control of various driving functions built in the camera body 1 is performed by a control circuit 21 as a control means. The control circuit 21 is a so-called microprocessor, and internally includes, for example, a ROM, a RAM, a timer (measuring means), a counter (counting means), an AD converter (means for changing an analog signal into a digital signal), and the like. ing. The control circuit 21 drives and controls various drive control functions of the camera body 1 according to a predetermined program preset and stored in the ROM.

The control circuit 21 includes the spool chamber 2
4, a film feeding circuit 31 for controlling a rotation direction, a rotation speed, and the like of a motor 23 provided in the spool shaft 22;
A perforation detection circuit 33 for electrically processing a detection signal from a perforation sensor (P sensor) 29 for detecting perforation provided on the film, and a motor sensor (M sensor) 30 for detecting the rotational driving of the motor 23 Is electrically connected to a motor rotation detection circuit 34 for electrically processing the detection signal.

In addition to the rotation of the spool shaft 22, the fork member 25 and the sprocket 9 of the patrone chamber 3 are rotated by the rotation drive transmission gears including various gears (not shown). It is designed to rotate.

Further, various switches are connected to the control circuit 21 via a switch input circuit 36. The various switches include a power switch 37 for turning on / off the supply of drive power to the camera body 1 and a camera body 1
Back switch (BKS)
W) 38, a first release switch (1RSW) 39 that is turned on by the first operation of a shutter release button (not shown) composed of a two-stage switch, and an on state by the second operation of the shutter release button A second release switch (2RSW) 40 is connected, and a rewind switch (RWSW) 41 that is linked to the on-operation of an intermediate rewind button (not shown) for forcibly instructing rewinding during use of the film is connected. .

The operation state signals of these various switches 37 to 41 are output to the control circuit 21 via the switch input circuit 36.

Further, the control circuit 21 has a nonvolatile memory E which is electrically rewritable.
The EPROM 62 is connected. This EEPROM
Reference numeral 62 is electrically connected to the control circuit 21 by a communication line. Then, predetermined data and the like from the control circuit 21 are stored through the communication line, and predetermined data and the like are output to the control circuit 21.

When the user turns on the power supply switch 37, a film supply circuit 31, such as the control circuit 21, a perforation detection circuit 33, a motor rotation detection circuit 34, a switch input circuit 3
6 and various drive control circuits (not shown) are supplied with drive power.
It is supplied to the control circuit 21 via the switch input circuit 36. Based on the ON information of the power switch 37, the control circuit 21 determines that the user performs a photographing operation with the camera body 1, and moves the photographing lens barrel 5 including the photographing lens 5a from the collapsed state to a predetermined photographing state. In order to move the photographic lens barrel, a photographic lens barrel drive circuit and a drive mechanism (not shown) are driven and controlled.

The BKSW 38 is configured such that after the user opens the back cover of the camera body 1 and loads the film patrone 2 into the patrone chamber 3, the BKSW 38 is displaced from the open state to the closed state. , Changes from on to off. The control circuit 21 having received the change from the ON state to the OFF state of the BKSW 38 through the switch input circuit 36,
A series of initial film feeding operations are performed.

When the 1RSW 39 is turned on in conjunction with the first-stage ON operation of the shutter release button, the ON information of the 1RSW 39 is transmitted to the switch input circuit 3.
6, and is supplied to the control circuit 21. The control circuit 21 executes a predetermined shooting preparation operation based on ON information of the 1RSW 39. The shooting preparation operation includes, for example, a subject distance measurement operation and a photometry operation using a predetermined distance measurement circuit and a photometry circuit (both not shown). The data obtained as a result of the distance measurement and the photometry is output while the ON signal of the 1RSW 39 is continuously output.
In other words, the question of whether the release button is operated at the minus stage is held.

When the 2RSW 40 is turned on in conjunction with the second-stage ON operation of the shutter release button, the ON information of the 2RSW 40 is transmitted to the switch input circuit 3.
6, and is supplied to the control circuit 21. The control circuit 21 performs the above-described 1 based on the ON information of the 2RSW 40.
Based on each data acquired in the shooting preparation operation performed when the RSW 39 is turned on, the focus is adjusted by extending the shooting lens barrel 5 and controlling the aperture mechanism and shutter mechanism (not shown). Then, an operation of exposing the subject to the film is performed, and the photographing lens barrel 5 is returned to a predetermined position. Furthermore, the motor 23 is driven and controlled by the motor 23 via the film feeding circuit 31 so as to execute the winding operation for one frame after the exposure, and wait for the next shooting operation. It has become.

The RWSW 41 is a switch interlocked with the on-operation of the midway rewind button for forcibly instructing the rewinding of the film. The ON information of the RWSW 41 is transmitted to the control circuit 2 via the switch input circuit 36.
When supplied to 1, the control circuit 21 drives and controls the motor 23 via the film feeding circuit 31 to perform a film rewinding operation.

The EEPROM 62 is provided with the control circuit 2
1 or the control circuit 2
For example, predetermined data or the like is output for one.

Next, the film feeding device of the camera body 1 includes a spool shaft 22 for winding and winding the film drawn from the inside of the film patrone 2 loaded in the patrone chamber 3, and the spool shaft 22. And a spool chamber 24 for accommodating the film wound around the outer periphery of the spool shaft 22.
Film rewinding or winding means, a cartridge chamber 3 for loading the film cartridge 2, and a fork member 25 for rotating a winding shaft of the film cartridge 2 in a predetermined direction. Means, a sprocket 9 having a plurality of claws 9b on its outer peripheral surface for engaging with the perforation of the film drawn from the film cartridge 2, and delivering the film, and a P sensor for detecting the perforation of the film. 29, an M sensor 30 for detecting the rotation of the motor 23, and the like.

The P sensor 29 is a reflection type optical sensor comprising a photo reflector or the like. The output of the P sensor 29 is transmitted to the control circuit 21 via a perforation detection circuit 33. Then, the control circuit 21 receives the information and acquires the film feeding information.

The M sensor 30 is a facing optical sensor comprising a photo interrupter or the like.
The output of 0 is transmitted to the control circuit 21 via the motor rotation detection circuit 34. In response to this, the control circuit 21 acquires various data and information such as the rotation speed and the rotation amount of the motor 23.

In the film feeding device of the camera body 1 according to the present embodiment, the feeding speed when the film is wound by the spool shaft 22 is higher than the feeding speed when the film is sent by the sprocket 9. It is set to be.

That is, the film housed in the film cartridge loaded in the cartridge chamber 3 of the camera 1 is first fitted with the claw 9b of the sprocket 9 and the perforation, and the sprocket chamber 24 is driven by the rotation of the sprocket 9 to rotate. Sent to When the film reaches the inside of the spool chamber 24 and the film is wound around the outer peripheral surface of the spool shaft 22, the spool shaft 22
After the film is wound around the film, the film is wound up by the spool shaft 22.

In the above-described film feeding apparatus, when the film is fed by the sprocket 9 and when the spool shaft 2
P sensor 29 and M sensor 3 when winding the film by 2
The relationship between output signals of 0 will be described with reference to FIGS. FIG. 8 shows output signals of the P sensor 29 and the M sensor 30 when the film drawn from the film cartridge 2 is sent out to the spool chamber by the sprocket 9. FIG. Sensor M and M sensor 3 when the film is wound around
0 indicates an output signal.

That is, as shown in FIG. 8, the P sensor 29 when the film is fed by the sprocket 9 is used.
The number m of output pulses of the M sensor 30 representing the rotation amount of the motor 23 is detected for the film length L of one perforation of the film detected in the above.

On the other hand, as shown in FIG. 9, when the film is wound on the spool shaft 22, the output pulse of the M sensor 30, which indicates the rotation amount of the motor 23, relative to the film length L of one perforation of the film. The number n is detected.

That is, by making the film feeding speed at the time of winding by the spool shaft 22 higher than the film feeding speed by the sprocket 9, the pulse per film length L of one film perforation detected by the M sensor 30 is detected. The number is set so that m> n.

The operation of the film feeder for a camera having such a configuration will be described with reference to the flowcharts of FIGS.

FIG. 3 is a flowchart showing the basic operation of the camera body 1. When a battery is loaded into the camera body 1 and the user turns on the power switch 37,
In response to this, the control circuit 21 executes a program stored in the internal ROM in advance, and starts the start in the flowchart of FIG. When the program stored in the ROM of the control circuit 21 of the camera body 1 is started, first, in step Sl, predetermined data is read from the EEPROM 62 and a process of expanding the data into the internal RAM is performed. Here, the data read from the EEPROM 62 includes, for example, (1) a flag (REWINDF) for instructing execution of a film rewinding operation, and (2)
A flag (REWINDEF) indicating that the film rewinding operation has been completed, and (3) a flag (L) instructing execution of the film feeding operation (film loading process).
OADF), (4) A flag (LOAD) for instructing retry of the film feeding operation when the film feeding operation has failed.
RTF), (5) a flag (LOADERF) indicating that the film feeding operation has completely failed, and (6) a flag (WI) indicating a film winding operation for one frame of the film.
NDF).

Next, in step S2, the control circuit 21
Is the film rewind instruction flag (REW) from the data read from the EEPROM 62 in step S1.
INDF). Here, the film rewinding operation instruction flag is set to REWI not performing the film rewinding operation.
If NDF = 0, the process proceeds to step S7. If the film rewinding operation instruction flag is REWINDF = 1 for performing film rewinding, the process proceeds to the next step S3.

If it is determined in step S2 that the film rewinding operation is to be performed, the control circuit 21 drives the motor 23 in the reverse direction via the film feeding circuit 31 in step S3, and the motor 23 The sprocket 9 and the fork member 25 of the patrone chamber 3 are driven in the film rewinding direction by the reverse rotation drive to rewind the film wound on the spool shaft 22.

When the rewinding of the film in step S3 is completed, the control circuit 21 initializes (clears) the film rewinding operation instruction flag (REWINDF) in step S4. The return end flag (REWINDEF) is set (set). When the setting of the film rewind end flag in step S5 to REWINDEF = 1 is completed, in step S6, the control circuit 21 proceeds to step S4.
And the setting data of each flag set in S5
M62 is stored, and the process proceeds to step S7 and subsequent steps.

In step S7, the control circuit 21 checks the film feeding operation instruction flag (LOADF) among the data read from the EEPROM 62 in step S1. Here, if it is confirmed that the flag LOADF = 0 for not performing the film feeding operation, the process proceeds to step S12 and subsequent steps. When it is confirmed that the flag LOADF for performing the film feeding operation is 1, the control circuit 21 performs a film feeding operation (film loading process) in step S8. Details of the film loading process will be described later.

When the film loading processing in step S8 is completed, the control circuit 21 initializes (clears) a film feeding operation instruction flag (LOADF) in step S9, and in step S10, the control circuit 21 rewinds the film. Initialize (clear) the operation flag (REWINDEF).

When the initialization of the film rewinding operation end flag REWINDEF = 0 in step S10 is completed, the control circuit 21 stores the setting data of each flag set in steps S9 and S10 in the EEPROM 62 in step S11. .

When the storage of the setting data of each flag in the EEPROM 62 in step S11 is completed, the control circuit 21 checks a flag (WINDF) for instructing a film winding operation for one frame in step S12. If it is determined in step S12 that the flag WINDF for not performing the winding for one frame is 0, the process from step S18 is performed, and if it is determined that the flag WINDF for performing the winding for one frame is 1, Step S13 and subsequent steps are executed.

If it is determined in step S12 that the flag WINDF = 1 for winding up by one frame, the control circuit 21 proceeds to step S13.
, The motor 23 is driven to rotate, and a process of winding one frame of the film around the spool shaft 22 is executed. In this film winding process, after the release switch 2RSW 40 is turned on, an aperture function and a shutter function (not shown) built in the taking lens barrel 5 are driven to expose the subject image to the film. The film is wound around the spool shaft 22 by the rotation of the motor 23, the exposed frame is moved, and the next unexposed frame is set at a predetermined position inside the camera body 1. is there.

During the film winding process in step S13, the control circuit 21 that has reached the end of the film (hereinafter referred to as the film end) sets a flag (FLMEDF) indicating that the film has reached the end. Configuration
(set.

When the film winding processing operation in step S13 is completed, the control circuit 21 proceeds to step S14.
Initializes (clears) the film winding flag WINDF, and then in step S15, the control circuit 21 determines whether or not the film end flag FLMEDF is set.

In step S15, the film end flag that has not reached the film end is FLMEDF = 0.
, The step S17 and subsequent steps are executed, and the film end flag reaching the film end is set to FLMEDF =
If it is 1, the control circuit 21 sets (sets) a film rewinding operation instruction flag (REWINDF) in step S16.

When the setting of the film rewinding operation instruction flag (REWINDF = 1) in step S16 is completed,
In step S17, the control circuit 21 determines in step S16
The setting data such as the flag set in the step is stored in the EEPROM 62, and thereafter, the process proceeds to step S18 (see FIG. 4).

In step S18, the control circuit 21
The film rewind operation instruction flag (REWINDF) is checked. If the film rewind operation instruction flag REWINDF = 1, the process returns to step S1, and in step S2, the control circuit 21 checks the film rewind operation instruction flag (REWINDF = 1). In step S3, a film rewinding process is executed.

If it is determined in step S18 that the film rewinding operation instruction flag (REWINDF) is 0, the film rewinding operation is not performed.
In the next step S19, the control circuit 21 sets the BKS of the back cover switch inputted through the switch input circuit 36.
Check the state of W38. Here, when the control circuit 21 confirms that the output signal of the BKSW 38 has changed from an ON signal to an OFF signal (ON → OFF), after the film cartridge 2 is loaded into the cartridge chamber 3 by the user, the same operation is performed. It is determined that the back cover has been closed by the user, and in step S20, the control circuit 21 sets (sets) the film feed flag LOADF.
Subsequently, in the next step S23, the control circuit 21 stores the film feed flag LOADF = 1 in the EEPROM 62, returns to step S1, and repeats the subsequent processing.

On the other hand, in step S19, the control circuit 2
If it is determined that there is no change in the output signal of the BKSW 38 of the back cover switch due to No. 1, the control circuit 21 determines in step S22 that the RW input through the switch input circuit 36
Check the state of SW41. If it is determined that the output signal of the RWSW 41 has been converted from an OFF signal to an ON signal (OFF → ON), the film is forcibly rewound in the middle of the film before the photographic exposure is performed up to the last frame of the film. Is determined to have been performed by the user. In step S23, the control circuit 21 sets (sets) a film rewinding operation instruction flag (REWINDF), and in the next step S24, the control circuit 2
1 indicates that the film rewinding operation instruction flag REWINDF = 1 set in step S23 is set in the EEPROM 62.
After that, the process returns to step S1, and the subsequent processes are repeated.

On the other hand, if the control circuit 21 determines in step S22 that there is no change in the output signal of the rewind switch RWSW41, the control circuit 21 proceeds to step S25 where the power supply input via the switch input circuit 36 Check the state of SW37. Here, the power supply SW3
When the control circuit 21 determines that the output signal of the camera 7 is an OFF signal, the user determines that the photographing has been completed, and in step S26, the control circuit 21 moves the photographing lens barrel 5 to the camera body. The collapsing operation is performed to store the lens in the predetermined internal position. The collapsing operation of the taking lens barrel 5 is intended to be a form that is convenient to carry when the camera body 1 is not used. The configuration and the like of this collapsing operation are not directly related to the present invention, and a description thereof will be omitted. When the sinking operation in step S26 is completed, the control circuit 21
Is set to a stop state (stop).

On the other hand, as a result of the determination of the output signal of the power supply SW 37 by the control circuit 21 in the above-described step S25,
When it is confirmed that the output signal of the power switch 37 is an ON signal, the control circuit 21 confirms a film rewind end flag (REWINDEF) in step S27.
Here, the flag REW indicating that the film rewinding operation has been completed.
If it is confirmed that INDEF = 1, it indicates that the film rewinding operation has already been completed, so that the subsequent processing relating to the photographing operation is not executed. Therefore, the process returns to the process of step S19 described above.
The subsequent processing is repeated.

If it is determined in step S27 that the film rewinding operation end flag REWINDEF = 0, the control circuit 21 determines in step S28 whether the photographing lens barrel 5 is in a photographing preparation state. Confirm whether or not. This photographing preparation state is confirmed by checking whether the photographing lens barrel 5 is extended from the inside of the camera body 1 by the position detecting means of the photographing lens barrel 5 (not shown) and is arranged at a predetermined position where photographing is possible. It is confirmation of.
Here, if the control circuit 21 determines that the taking lens barrel 5 is in the extended state (lens extension completed state), step S30 and subsequent steps are executed, and
If it is determined that the taking lens barrel 5 has not been extended,
In step S29, the control circuit 21 controls the driving of the extension driving unit of the photographing lens barrel 5, and moves the photographing lens barrel 5 to a predetermined position so as to be in a photographing preparation state in which a photographing operation can be performed.

In step S28, the photographing lens barrel 5
Is determined that the lens has been extended, or the above-described step S
After the photographing lens barrel 5 is extended to a predetermined position in 29, the control circuit 21 checks the input signal of the 1RSW 39 via the switch input circuit 36 in step S30. Here, the control circuit 2 indicates that the output signal of the 1RSW 39 has changed from the OFF signal to the ON signal (OFF → ON).
1, the control circuit 21 determines that the user has performed the shooting preparation operation by operating the shutter release button of the camera body 1 at the -th step, and the control circuit 21 proceeds to the next step S31. A distance measuring unit (not shown) is drive-controlled to measure the distance to the subject, and the extension amount of the photographing lens barrel 5 is calculated based on the distance measurement result. When the distance measuring operation in step S31 is completed, step S32
In, the control circuit 21 controls the drive of a photometric unit (not shown) to measure the subject luminance, and calculates a shutter speed, an aperture value, and the like based on the photometric result.

If it is determined in step S30 that the 1RSW 39 has not been turned on, the process returns to step S19 and repeats the processing.

When the photometry processing in step S32 is completed, the control circuit 21 checks the state of the 2RSW 40 via the switch input circuit 36 in step S33 in FIG. Here, when it is confirmed that the output signal of the 2RSW 40 is an ON signal, it is determined that the user has operated the second step of the shutter release button of the camera body 1 to execute the actual shooting operation. Then, the process proceeds to the processing of the next step S35 and subsequent steps. If the output signal of the 2RSW 40 remains an off signal, the control circuit 21 checks again the state of the 1RSW 39 input via the switch input circuit 36 in step S34. Where 1RSW
If the output signal 39 continues in the on state, the process returns to the above-described step S33, and the subsequent processes are repeated. If the output signal of the 1RSW 39 is confirmed to be an off signal, it is determined that the operation of the shutter release button by the user has been released, and the above-described step S
Returning to the process of step 19, the subsequent processes are repeated.

In step S33, the control circuit 2
When 1 confirms the ON signal of the 2RSW 40, step S
In 35, the control circuit 21 determines the focus adjustment lens (a plurality of lenses constituting the taking lens 5a of the taking lens barrel 5) based on the subject distance value measured and calculated in the distance measurement in step S31. Hereinafter, a focus lens (not shown) is driven and controlled by a focus adjustment driving unit (not shown) to perform a process of extending a photographing lens for focus adjustment.

When the focusing lens extending process in step S35 is completed, in step S36, the control circuit 21 causes the film one-frame winding flag (WIN
DF) is set (set), and in the next step S37, the control circuit 21 causes the EEPROM 62 to store the setting of the film one-frame winding flag WINDF = 1 set in the step S36.

In the above step S37, the flag for winding one frame of the film onto the EEPROM 62, WINDF = 1
Is completed, in step S38, the control circuit 21 drives a shutter mechanism, an aperture mechanism, and the like (not shown) based on the subject photometric value subjected to the photometric processing in step S32, and The subject exposure processing is performed on the frame of the film disposed in.

When the exposure processing in step S38 is completed, in step S39, the control circuit 21 moves the focal lens into a predetermined initial position, and then in step S40, the control circuit 21 In order to wind up the exposed frame, the motor 23 is driven to rotate through the film feeding circuit 31 to perform a film winding process for one frame. When the film winding process is completed, the control circuit 21
Indicates the film 1-frame winding flag (WIND
After initializing (clearing) F), the process proceeds to step S42.

In step S42, the control circuit 21
Referring to the internal RAM, the film end flag FLME
Check the state of the DF. This film end flag (F
LMEDF) sets the film end flag (F) when the film end is detected during the film winding operation in the film winding process in step S40 described above.
LMEDF) is set (set). On the other hand, when the film has been normally wound up for one frame, the film end flag (FLMEDF) is initialized (cleared).
Is done.

In step S42, the film end flag that has not reached the film end is FLMEDF = 0.
, The step S44 and subsequent steps are executed, and the film end flag reaching the film end is set to FLMEDF =
If it is 1, the control circuit 21 sets (sets) a film rewinding and operation instruction flag (REWINDF) to execute the film rewinding process in step S43.

In step S42, it is determined that the film end flag FLMEDF = 0, or in step S43, the film rewind operation instruction flag is set to REW.
When INDF = 1 is set, the control circuit 21 sets the film end flag FLMEDF = 0 in step S42 or the film rewind operation instruction flag REWINDF = 1 in step S43 to EE in step S44.
It is stored in the PROM 62.

When the process of storing the data in the EEPROM 62 in step S44 is completed, in step S45, the control circuit 21 checks the state of the film rewind operation instruction flag (REWINDF) with reference to the internal RAM. Here, the film rewind operation instruction flag REWINDF
If = 1, the process returns to step S1, and the subsequent processes are repeated.

If it is confirmed in step S45 that the film rewinding operation instruction flag REWINDF = 0, the process returns to step S19, and the subsequent processing is repeated.

Next, the details of the first embodiment of the film loading operation in step S8 will be described with reference to FIG. This film loading operation is shown in FIG.
In step S19, when the BKSW 38 of the back cover state detection switch of the camera body 1 is detected to change from an ON signal to an OFF signal (ON → OFF), that is, the film cartridge 2 is moved by the user into the cartridge chamber 3 of the camera body 1. It is determined that the back cover is closed and the film feed flag LO is determined in step S20.
ADF = 1 is set, and E is set in step S21.
After the film feed flag LOADF = 1 is stored in the EPROM 62, the process returns to step S1 and returns to step S1.
When the various flag data stored in the EEPROM 62 are read, the film rewinding operation instruction flag is determined to be REWINF = 0 in step S2, and the film feed flag is determined to be LOADF = 1 in step S7. Next, a film loading process executed in step S8.

When the process shifts to the film loading, the control circuit 21 executes a voltage setting process for setting a drive voltage for driving the motor 23 to rotate in step S51. The voltage to be set here is
2 is set to a drive voltage lower than the drive voltage supplied to the motor 23 when the film is wound. That is, the motor 23
Is transmitted to the sprocket 9 and the above M
The number m of pulses of the motor 23 detected by the sensor 30 is P
The film length L of the perforation output signal detected by the sensor 29 is set so as to have the relationship described with reference to FIG.

When the setting of the drive voltage of the motor 23 in step S51 is completed, the control circuit 21
Drives the motor 23 through the film feeding circuit 31 using the drive voltage of the motor 23 set in the step S51, and drives the motor 23 from the film cartridge 2 using the sprocket 9 by the rotation. The film is fed and driven so as to be fed in the spool axial direction.

When the rotation of the motor 23 is started in step S52, the control circuit 21 proceeds to step S53.
The control circuit 21 executes a reset process of the counter 1 for initializing (clearing) a first counter of counters provided inside the control circuit 21 itself. This counter 1 is a P sensor 2
9 is for counting the perforations detected.

When the reset of the counter 1 in step S53 is completed, in step S54, the control circuit 2
1 executes a timer start process for starting time measurement by a timer in the control circuit 21. This timer is used to measure an interval of an output change that occurs when the perforation of the film is detected by the P sensor 29. At first, the timer is used until the first perforation is detected by the P sensor 29 from the leading end of the film. A relatively long time is set.

That is, if there is no change in the output signal of the P sensor 29 within a predetermined time period measured by the timer, the film is sent out, or the film is wound on the spool shaft 22 (winding). It can be determined that the operation is abnormal.

When the timer start in step S54 is executed, in step S55, the control circuit 21 detects the P sensor 29, and outputs the output signal of the P sensor 29 through the perforation detection circuit 33 to low ( L
o) It is determined whether switching from the level to the high (Hi) level is detected.

The output state when the first perforation is detected by the P sensor 29 is first switched from high (Hi) level to low (Lo) level as shown in FIG. ) After the level continues, it switches to the high (Hi) level. Therefore, in step S55, the first perforation is detected and confirmed by confirming whether or not the output signal of the P sensor 29 has switched from the low (Lo) level to the high (Hi) level.

In this case, P
From the low (Lo) level of the output of the sensor 29 to the high (H)
i) If switching to the level is not detected, the control circuit 21 determines in step S65 whether a predetermined time has elapsed from the start of the timer 1 processed in step S54, and the timer 1 has not elapsed since the predetermined time has elapsed. If not, the process returns to step S55, and the output of the P sensor 29 is again changed from the low (Lo) level to the high (H) level.
i) Determine whether the level has been reached.

In step S65, when it is confirmed that the timer 1 has elapsed after the lapse of a predetermined time, it is determined that the film loading operation such as film feeding or winding (winding) has failed.
Since it is necessary to notify the user that the film loading has failed, in step S66, the film loading failure is performed using a not-shown display means such as a liquid crystal or LED provided on the camera body 1. warning,
Alternatively, a warning display such as reloading of the film is performed. In addition, as this warning display, a loading failure warning sound may be emitted using a sounding member.

In step S55, the control circuit 21
However, when detecting that the output of the P sensor 29 has been switched from the low (Lo) level to the high (Hi) level, the control circuit 21 executes a timer start process for restarting time measurement by its own internal counter in step S56. I do. The timer start process performed here is a time necessary and sufficient for the first perforation to pass to a predetermined position facing the P sensor 29, and is longer than the time set in the process of step S54. Is set for a considerably short time.

When the timer start in step S56 ends, the control circuit 21 determines in step S55 that the first perforation has been detected in step S55.
Execute the counter 1 count-up processing to add
Proceed to step S58.

In step S58, control circuit 21
Stores the count value of the counter 2 that counts the output signal of the M sensor 30 in the RAM. The self-internal counter of the control circuit 21 is a hardware counter,
The pulse signal of the M sensor 30 output from the motor rotation detection circuit 34 in response to the rotation of the motor is automatically counted. The waveforms of the output signal of the P sensor 29 and the output signal of the M sensor 30 when the film is fed by the sprocket 9 (before winding by the spool shaft 22) are as shown in FIG.

Next, in step S59, the control circuit 21 initializes (clears) its own internal counter 2 by using the counter 2
Perform a reset. At this time, the above steps S57 and S57
At 58, the number of pulses of the M sensor 30 generated while the first perforation of the film passes over the P sensor 29 is stored in the RAM.

Next, at step S60, the control circuit 2
1 checks whether or not the internal counter 1 has reached a predetermined value A or more. Here, the counter value of counter 1
If (the numerical value of the output signal from the perforation detection circuit 33) is less than the predetermined value A (<A), the process returns to step S55, and the subsequent processes are repeated. If the counter value is equal to or greater than the predetermined value A (A ≦), it can be determined that the film has been sent out by the length of the film that starts to be wound by the spool shaft 22, and the process proceeds to the next step S61. Will be migrated. This predetermined value A
Is set to a value of perforation corresponding to a film length sufficient for the film to be fed out by the sprocket 9 and wound by the spool shaft 22.

In step S61, the control circuit 21
It is determined whether or not the value of the internal counter 2 has reached the predetermined value B. As the predetermined value B, a perforation number corresponding to a film length sufficient for the film to reach the spool shaft 22 is set. Here, the counter value of the counter 2 (perfection 1 detected by the P sensor 29)
When the value of the signal of the M sensor 30 output during the time of the number of output signals is equal to or more than the predetermined value B (B ≦), the film has already sent out a sufficient length to reach the sprocket 9. It is determined that winding by the spool shaft 22 has not been performed despite the
The process branches to 66.

The counter value is less than the predetermined value B (<
In the case of B), it can be determined that the film has been wound by the spool shaft 22, and the subsequent steps are executed in the next step S62. The waveforms of the output signal of the P sensor 29 and the output signal of the M sensor 30 in this state are as shown in FIG.

If it is determined in step S61 that the film is less than the predetermined value B, the counter 2 can determine that the film has been wound on the spool shaft 22.
At 62, the control circuit 21 increases the drive voltage supplied to the motor 23 and sets the drive voltage of the motor 23 to reduce the remaining loading processing time.

Next, in step S63, the control circuit 2
1 checks whether the internal counter 1 has reached a predetermined value C or not. Here, the counter value of the counter 1 (the value of the output signal from the perforation detection circuit 33)
Is smaller than the predetermined value C (<C), the process returns to the above-described step S55, and the subsequent processes are repeated. Also,
If the counter value is equal to or larger than the predetermined value C (C ≦), it is determined that the film is placed at a predetermined position inside the camera body 1 and is ready for shooting, and the process proceeds to the next step S64. .

If it is determined in step S63 that the film loading process has succeeded, the control circuit 21 initializes (clears) a film feeding retry flag (LOADRTF) in step S64.

When either the initialization of the film feeding retry flag in step S64 (LOADRT = 0) or the display of the film loading failure warning in step S66 is completed, the control circuit 21 proceeds to step S67. Then, a motor brake process is performed on the motor 23 via the film feeding circuit 31, and in step S68, a timer start process for starting a timer measurement is performed in order to measure an elapsed time from the time when the motor brake is started. .

When the timer start processing in step S68 is completed, in step S69, the control circuit 21
Determines whether a predetermined time during which the motor brake is continued has elapsed, and when the predetermined time has elapsed (time-up), the control circuit 21 controls the film feeding circuit 31 in the next step S70 to 23, a motor-off process for stopping the supply of the driving voltage is performed, and this series of film loading processes is terminated.
9 and subsequent steps are executed.

As described above, according to the above-described first embodiment, during the auto-loading operation, the number of motor rotation signals in the output signal time for one perforation is measured to transmit the signals. It can be checked whether the film has been wound around the film spool shaft.

Next, a second embodiment of film loading of a camera according to the present invention will be described with reference to FIG. In the second embodiment, the number of motor rotation signals generated during the feeding of the film length of one perforation at the time when the film feeding speed during the film feeding operation by the sprocket 9 is stabilized, that is, the number of motor rotations The amount of rotation and the film of one perforation at the time when a film length sufficient to be wound around the spool shaft 22 is sent out, that is, at the time when the film will start to be wound by the spool shaft 22 By comparing the value with the motor rotation value generated while the length is fed, it is possible to determine that the fed film is sufficiently wound on the spool shaft 22, for example, one perforation during the film feeding operation. Motor rotation signal number generated during feeding
This is to confirm whether or not the fed film has been wound around the spool shaft 22 by comparing the multiplied film.

When the process shifts to the film loading, the control circuit 21 executes a voltage setting process for setting a drive voltage for driving the motor 23 to rotate in step S71. The voltage to be set here is
2 is set to a drive voltage lower than the drive voltage supplied to the motor 23 when the film is wound. That is, the motor 23
Is transmitted to the sprocket 9 and the above M
The number m of pulses of the motor 23 detected by the sensor 30 is P
The film length L of the perforation output signal detected by the sensor 29 is set so as to have the relationship described with reference to FIG.

When the setting of the drive voltage for the motor 23 in step S71 is completed, the control circuit 21
Drives the motor 23 through the film feeding circuit 31 using the driving voltage of the motor 23 set in the step S71, and drives the motor 23 from the film cartridge 2 using the sprocket 9 by the rotation. The film is fed and driven so as to be fed in the spool axial direction.

When the rotation of the motor 23 is started in step S72, the control circuit 21 proceeds to step S73.
The control circuit 21 performs a reset process of the counter 1 for initializing (clearing) a first counter of the counters provided inside itself. This counter 1 is for counting perforations detected by the P sensor 29.

When the resetting of the counter 1 in step S73 is completed, in step S74, the control circuit 2
1 executes a timer start process for starting time measurement by a timer in the control circuit 21. This timer is used to measure an interval of an output change that occurs when the perforation of the film is detected by the P sensor 29. At first, the timer is used until the first perforation is detected by the P sensor 29 from the film front end. A relatively long time is set.

That is, if there is no change in the output signal of the P sensor 29 within a predetermined time measured by the timer, the film is sent out, or the film is wound on the spool shaft 22 (winding). It can be determined that the operation is abnormal.

When the timer start in step S74 is executed, in step S75, the control circuit 21 detects the P sensor 29, and outputs the output signal of the P sensor 29 through the perforation detection circuit 33 to low ( L
o) It is determined whether switching from the level to the high (Hi) level is detected.

The output state when the first perforation is detected by the P sensor 29 is first switched from a high (Hi) level to a low (Lo) level as shown in FIG. ) After the level continues, it switches to the high (Hi) level. Therefore, in step S75, the first perforation detection is confirmed by confirming whether or not the output signal of the P sensor 29 has switched from the low (Lo) level to the high (Hi) level.

In this case, P
From the low (Lo) level of the output of the sensor 29 to the high (H)
i) If the switching to the level is not detected, the control circuit 21 determines in step S86 whether a predetermined time has elapsed since the start of the timer 1 processed in step S74, and the timer 1 has not elapsed since the predetermined time has elapsed. If not, the flow returns to step S75, and the output of the P sensor 29 is again changed from the low (Lo) level to the high (H) level.
i) Determine whether the level has been reached.

In step S86, when it is confirmed that the timer 1 has elapsed after the lapse of the predetermined time, it is determined that the film loading operation such as feeding or winding (winding) of the film has failed.
Since it is necessary to notify the user that the film loading has failed, in step S87, using the display means such as a liquid crystal or an LED (not shown) provided on the camera body 1, the loading of the film fails. warning,
Alternatively, a warning display such as reloading of the film is performed. In addition, as this warning display, a loading failure warning sound may be emitted using a sounding member.

In step S75, the control circuit 21
However, when detecting that the output of the P sensor 29 has been switched from the low (Lo) level to the high (Hi) level, in step S76, the control circuit 21 executes a timer start process for restarting time measurement by its own internal counter. I do. The timer start process performed here is a time necessary and sufficient for the first perforation to pass at a predetermined position facing the P sensor 29, and is longer than the time set in the process of step S74. Is set for a considerably short time.

When the timer start in step S76 ends, the control circuit 21 determines in step S75 that the first perforation has been detected in step S75.
Execute the counter 1 count-up processing to add
Proceed to step S78.

In this step S78, the control circuit 21
Stores the count value of the counter 2 that counts the output signal of the M sensor 30 in the RAM. The internal counter of the control circuit 21 is a hardware counter.
The pulse signal of the M sensor 30 output from the motor rotation detection circuit 34 in response to the rotation of the motor is automatically counted. The waveforms of the output signal of the P sensor 29 and the output signal of the M sensor 30 when the film is fed by the sprocket 9 (before winding by the spool shaft 22) are as shown in FIG.

Next, in step S79, the control circuit 21 initializes (clears) its own internal counter 2 by using the counter 2
Perform a reset. In steps S77 and S78, the number of pulses of the M sensor 30 generated while the first perforation of the film passes over the P sensor 29 is RA
Store it in M.

Next, in step S80, the control circuit 2
1 checks whether or not the internal counter 1 has reached a predetermined value D. Here, the counter value of the counter 1 (the value of the output signal from the perforation detection circuit 33)
Is other than the predetermined value D (≠ D), step S82
And the subsequent processes are repeated. If the counter value is equal to the predetermined value D (D =), it can be determined that the film has been sent out and has been sent out by the length of the film at which the film feeding speed is stabilized. The process moves to step S81.

In step S81, the control circuit 21
By the length of the film where the film feeding speed is stable,
The counter value of counter 2 at the time of transmission (P
The value of the signal of the M sensor 30 output during the time of one output signal of the perforation detected by the sensor 29), that is, the value stored in the RAM in step S78 is stored as E.

Next, at step S82, the control circuit 21
Determines whether or not the film length until the film is wound around the spool shaft 22 has been sent, that is, whether or not the internal counter 1 has exceeded a predetermined value A. Here, when the counter value of the counter 1 (the value of the output signal from the perforation detection circuit 33) is less than the predetermined value A (<A), the process returns to the above-described step S75, and the subsequent processes are repeated. The counter value is a predetermined value A.
In the case of (A ≦), the film is
It can be determined that the film has been sent out by the length of the film that starts to be taken up by 2.

If it is determined in step S82 that the value of the counter 1 is equal to or larger than the predetermined value A (A≤), the flow advances to step S8.
3, the control circuit 21 determines that the film is on the spool shaft 22.
It is checked whether or not winding has begun. That is,
When the value of the internal counter 2 becomes 1/3 or less of the numerical value E stored in step S81 (E / 3 ≧), step S84 and subsequent steps are executed, and the control circuit 21 sets the numerical value stored in step S81. If it has not reached １ ／ of E (> E / 3), the process proceeds to step S87.

If it is determined in step S83 that the value of the counter 2 is equal to or less than 1/3 of the value E, the flow proceeds to step S83.
At 84, the control circuit 21 checks whether or not the internal counter 1 has reached a predetermined value C. Here, the counter value of the counter 1 (perforation detection circuit 33)
Is smaller than the predetermined value C (<
In C), the process returns to the above-described step S75, and the subsequent processes are repeated. If the counter value is equal to or greater than the predetermined value C (C ≦), it is determined that the film is placed at a predetermined position inside the camera body 1 and is in a shooting preparation state, and the process of the next step S85 Proceed to.

If it is determined in step S84 that the film loading process has succeeded, the control circuit 21 initializes (clears) a film feeding retry flag (LOADRTF) in step S85.

When either the initialization of the film feeding retry flag in step S85 (LOADRT = 0) or the display of the film loading failure warning in step S87 is completed, the control circuit 21 proceeds to step S88. Then, a motor braking process is performed on the motor 23 via the film feeding circuit 31, and in step S89, a timer start process for starting a timer measurement is performed in order to measure an elapsed time from when the motor braking is started. .

When the timer start processing in step S89 is completed, the control circuit 21 proceeds to step S90.
Determines whether a predetermined time during which the motor brake continues has elapsed, and when the predetermined time has elapsed (time-up), in the next step S91, the control circuit 21 controls the film feeding circuit 31 to 23, a motor-off process for stopping the supply of the driving voltage is performed, and this series of film loading processes is terminated.
9 and subsequent processes are executed.

As described above, according to the second embodiment, the number of motor rotation signals per output signal time for one perforation when the film feeding speed during the film feeding operation is stabilized is stored. In addition, the motor rotation signal value in the output signal time for one perforation at the time when the film amount until the film is wound around the spool shaft and the output signal time for one perforation in the film sending operation On the basis of the number of motor rotation signals, a numerical value that can be used to reliably determine that the film that has been sent out is wound by the spool, for example, the number of motor rotation signals in the output signal time for one perforation during the film sending operation is 1/3. Compared with the multiplied one, it is checked whether the sent film has wrapped around the spool shaft. Can be sure, can be sufficiently check the film autoloading against state change type and a low temperature or the like of the load change and the film of the film feeding.

[0121]

According to the present invention, there are provided a feeding means for feeding a film toward a take-up spool, and a winding means for winding the film which has reached the take-up spool by the take-up spool. In a film feeder of a camera in which the film transport speed by the winding means is higher than the speed, by comparing the speed at the time of sending out the film of the sending means with the winding speed of the winding means, This has the effect of reliably detecting the success of loading and improving the reliability of film auto-loading.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a film feeding device for a camera according to the present invention.

FIG. 2 is a rear view of the camera for explaining the configuration of the film feeding device of the camera according to the present invention.

FIG. 3 is a flowchart illustrating a basic operation of the camera according to the present invention.

FIG. 4 is a flowchart illustrating a basic operation of the camera according to the present invention.

FIG. 5 is a flowchart illustrating a basic operation of the camera according to the present invention.

FIG. 6 is a flowchart for explaining the operation of the first embodiment of the automatic loading by the film feeding device of the camera according to the present invention.

FIG. 7 is a flowchart for explaining the operation of the second embodiment of the automatic loading by the film feeding device of the camera according to the present invention.

FIG. 8 is an explanatory diagram illustrating a signal relationship between a P sensor and an M sensor when the film is fed by the film feeding device of the camera according to the present invention.

FIG. 9 is an explanatory diagram illustrating a signal relationship between a P sensor and an M sensor when the film is wound by the film feeding device of the camera according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Camera body 2 ... Film patrone 3 ... Patrone room 5 ... Photographing lens barrel 9 ... Sprocket 21 ... Control circuit 22 ... Spool shaft 23 ... Motor 24 ... Spool room 25 ... Fork member 29 ... P sensor 30 ... M sensor 31 ... Film feeding circuit 33: Perforation detection circuit 34: Motor rotation detection circuit 36: Switch input circuit 62: EEPROM

Claims (3)

[Claims] 1. A feeding means for feeding a film toward a take-up spool, a winding means for winding the film reaching the take-up spool by the take-up spool, and a feeding speed of the film by the feeding means. A film feeding device for a camera, wherein a film feeding speed of the film by the winding means is higher; a film moving amount detecting means for detecting a moving amount of the film; and a motor for driving at least the winding means. A motor rotation amount detection unit that outputs a pulse signal in accordance with the rotation amount; and a determination unit that determines whether or not the fed film has reached the spool. A film feeder for a camera, characterized in that, when it is determined that the film has arrived, the auto loading of the film is successful. 2. The method according to claim 1, wherein the determining means measures a motor rotation amount obtained from the motor rotation amount detection means with respect to a fixed film movement amount obtained at a predetermined timing from the film movement amount detection means, and supplies the film. 2. The film feeding device according to claim 1, wherein the feeding speed is obtained. 3. The criterion of the determination means is that the determination is made based on whether or not the feeding speed of the film during feeding operation is equal to the feeding speed of the film by the winding means. Item 7. The film feeding device according to Item 1.