JPH07287280A - Film feeder for camera - Google Patents

Abstract

PURPOSE:To provide a film feeder, for a camera capable of increasing the latitude of arranging a perforation detecting means and simultaneously recording optical information without increasing members. CONSTITUTION:This film feeder is provided with a film feeding motor 10 being a film feeding means for feeding a film 1, a photoreflector(PR) 8 being a perforation detecting means for detecting the perforation 4 provided on the film 1, a photointerrupter(PI) 14 being a film feeding amount detecting means for detecting the feeding amount of the film 1 by the film feeding motor 10 and a control means 20 being a feeding control means for stopping the feeding of the film by the film feeding motor 10 after the photoreflector 8 detects the perforation 4 and the film is fed by a prescribed amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeding device,
More specifically, the present invention relates to a film feeding device for a camera that uses a roll-shaped film housed in a film cartridge.

[0002]

2. Description of the Related Art In recent years, while the number of perforations provided at both ends in the width direction of a conventional 135-inch roll film has been reduced to a required minimum number, for example, an optical information recording area is provided in a space outside an exposure screen frame. Various cameras have been proposed in which an optical information recording means is provided in a camera body at a position opposite to this, and thereby information is imprinted on the information recording area of the film. In such a camera, a film feeding device for accurately stopping each filmed frame of a film at a predetermined stop position is required.

For example, according to the stop control device for a camera disclosed in Japanese Patent Laid-Open No. 4-212943, a camera using a film having two perforations for each frame is first And a second perforation detecting means, wherein the second perforation detecting means is used for starting deceleration for stopping the film feeding, and the first perforation detecting means is provided at the stop position of the film. is there.

[0004]

However, according to the means disclosed in Japanese Patent Laid-Open No. 4-212943, the perforation detecting means must be provided at the perforation stop position, so that the perforation detecting means is arranged. There is a problem in that there is no degree of freedom in designing and design restrictions are imposed.

An object of the present invention is to increase the degree of freedom in the arrangement of the perforation detecting means by detecting the film end before the photographing screen is set in the photographing opening, and to increase the degree of freedom of the perforation detecting means. It is an object of the present invention to provide a film feeding device for a camera which records optical information on a film without increasing the number of members.

[0006]

A film feeding apparatus for a camera according to the present invention comprises a film feeding means for feeding a film, a perforation detecting means for detecting perforations provided on the film, and the film feeding means. And a feed control for stopping the film feeding of the film feeding means after a predetermined amount is fed after the perforation detecting means detects the perforation. A film feeding means for feeding the film, a perforation detecting means for detecting the perforation provided on the film and recording information on the film, and the film feeding means. A feeding amount detecting means for detecting the feeding amount of the film by the means, During the feeding of the film by beam feeding means, based on an output of the perforation detecting means and feeding amount detection means, characterized by comprising a control means for causing information recorded in the perforation detecting means.

The perforation detecting means is arranged upstream from the information recording area of the film in the film feeding direction.

[0008]

The feeding amount detecting means detects the feeding amount of the film performed by the film feeding means, and the perforation detecting means detects the perforation provided on the film. After the feeding of the predetermined amount detected by the feeding amount detecting means, the feeding control means stops the film feeding operation of the film feeding means.

Further, the feeding amount detecting means detects the feeding amount of the film performed by the film feeding means, and the perforation detecting means detects the perforation provided on the film, and the film feeding means detects the film. During feeding, the control means controls the perforation detecting means based on the outputs of the perforation detecting means and the feeding amount detecting means to cause the film to record information.

The perforation detecting means is arranged upstream of the information recording area of the film in the film feeding direction.

[0011]

The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a plan view showing the structure of a film applied to the camera of the present invention. As shown in FIG. 1, the film 1 has one end 1a fixed to a film spool 3 which is coaxially and rotatably supported in the inside of the cartridge main body 2, and the outer peripheral surface of the film spool 3 is fixed. It is wound up in a roll shape and stored in the cartridge body 2.
It should be noted that FIG. 1 shows a state in which the film 1 is entirely pulled out from the inside of the cartridge body 2.

A plurality of perforations 4 (for example, four perforations in FIG. 1) are continuously formed at predetermined intervals at one end of the leader portion 1b of the film 1 in the width direction. And a winding perforation group 4a. Also, similarly to this, the first perforation 4b of the final shooting frame 5b
One perforation is continuously formed after the, and the perforation group 4d for film end detection is constituted by these two perforations.

Then, at one widthwise end of the film 1,
Two perforations for each of the shooting frames 5, that is, the first perforation 4b and the second perforation.
The perforations 4c are arranged on the same line as the detection and take-up perforation groups 4a of the leader section, and an information recording area for each frame of the photographed frame 5 between the first and second perforations. The optical recording area 23 is provided. In this case, among the shooting frames 5 of the film 1, the first shooting frame 5 is the first shooting frame 5a and the final shooting frame 5 is the final shooting frame 5b.

FIG. 2 is a block diagram of the camera of the first embodiment of the present invention. Note that, in FIG. 2, members other than those related to the present invention are omitted in order to avoid complication of the drawing.

As shown in FIG. 2, in the camera of the first embodiment, the film spool 3 rotatably supported by the film cartridge 2 is fed to the film spool 3 at the time of initial feeding and rewinding of the film 1. A fork portion 6 driven by a mechanism (not shown) is engaged, and the fork portion 6 is provided inside the take-up spool 11 on the camera body side via the feeding / transmitting device 7. It is adapted to be driven by a film feeding motor 10 which is a feeding means.

The drive of the film feeding motor 10 is controlled via a motor drive circuit 12 by a control circuit 20 which is a control means composed of, for example, a CPU and a feeding control means. . An encoder 13 is fixed on the extension of the output shaft of the film feeding motor 10, and the encoder 13 is adapted to rotate integrally with the output shaft of the film feeding motor 10. There is. The encoder 13 has radial slits formed at regular intervals.
The rotation of is detected by a photo interrupter (PI) 14 which is a feeding amount detecting means for detecting the feeding amount of the film 1 by the film feeding motor 10. The PI 14 is connected to the control circuit 20 via the signal processing circuit 15 and is controlled thereby. In addition, the encoder 13
May be provided in the feed transmission device 7 without being fixed to the output shaft of the film feeding motor 10.

On the other hand, a photoreflector (PR) 8 which is a perforation detecting means is provided in the film feeding path near the photographing opening 24, and the perforation provided on the film 1 is provided by the PR 8. Four
It is designed to detect The signal detected by the PR8 is input to the control circuit 20 via the signal processing circuit 15.

Further, the control circuit 20 is connected with a frame number counter 25 for counting the number of film frames, a ROM 16 storing various program sequences, and a release button 17 for sending a release signal. Further, inside the control circuit 20, the memory 1
8 and a timer 19 are provided.

An optical recorder 21 is provided outside the frame of the photographing opening 24 and at a position facing the optical recording area 23 of the film 1. Although details of the optical recorder 21 are not shown, for example, the optical recorder 21 is composed of two light emitting diodes (LEDs) arranged vertically and a mask plate arranged in front of the two. L above
A slit opening is formed so that the light emitted from the ED becomes a vertically long slit light. Then, the optical recorder 2
1 is the above-mentioned control circuit 20 via the LED drive circuit 22.
It is connected to and is controlled by this.

FIG. 4 is a flow chart of a sequence showing an outline of the whole photographing by the camera to which the film feeding apparatus of the first embodiment is applied. First, the cartridge body 2 is loaded into a cartridge chamber (not shown) provided in the camera body (S1, where S is an operation step. The same applies hereinafter). Then, the control circuit 20 starts preloading for setting the first photographing frame 5a of the film 1 in the photographing opening 24, that is, initial feeding of the film 1 (S2).

Next, the photographer shoots the film 1 during shooting.
When it is desired to rewind, when the midway rewind switch (not shown) of the camera body is operated (S3), the control circuit 20 executes forced rewind (S4). On the other hand, in step S3, when shooting is continued, the control circuit 20 waits until the release button 17 is pressed (S5), the release button 17 is pressed, and the control circuit 20 receives a release-on signal. Then, the exposure is started. At the same time, photographing information such as exposure data and enlargement magnification is recorded in the optical recording area 23 of the film 1 by the optical recorder 21 (S6).

When the exposure of the first frame and the optical data recording operation are completed in this way, the control circuit 20 drives the film feeding motor 10 via the motor drive circuit 12,
After the film 1 is wound up by one frame, it is waited until the release button 17 is pressed again, and the same exposure operation is repeated. Then, all the effective number of frames of the film 1 have been shot, that is, the last frame of shooting 5b.
When the exposure of 1 is completed, the film 1 is rewound into the cartridge main body 2 (S7), and is in a standby state for the next cartridge loading operation.

FIG. 5 is a flow chart showing a sequence of one frame winding in a camera to which the film feeding apparatus of the first embodiment is applied, and the sequence of one frame winding of the film 1 in step S7 of FIG. 4 described above. Will be described in detail. In addition, here, the film 1
As shown in FIG. 3A, the photo reflector (PR) 8 serving as the perforation detecting means is arranged above the photographing frame 5 set in the photographing opening 24.
For (n), the first of the previous frame 5 (n-1)
Perforation 4b and second perforation 4c
It is assumed that it is arranged at an arbitrary position facing the optical recording area 23 between them.

As shown in FIG. 5, first, step S101.
In, it is determined whether the state of the photo reflector (PR) 8 is on (ON) or off (OFF),
If it is ON, it is turned OFF in step S102 and the process proceeds to step S103, while PR8 is turned OFF (O) in step S101.
FF), the process immediately proceeds to step S103.

In step S103, the control means 20
Is a rotation pulse number P of a photo interrupter (PI) counter for detecting the rotation amount of the film feeding motor 10.
PIx = 0 is set by initializing Ix.

Then, in step S104, it is determined whether or not the frame number count value (photographing number value) Fcount is the value corresponding to the first image, that is, Fcount = 1. Here, the frame number count value Fcount
In the case of = 1, it means immediately after the end of the preloading, so the number of pulses P obtained in the previous frame-by-frame advance P
There is no Ilast data. Therefore, step S
In 105, as an initial setting value, for example, PIla
While st = 10 pulses is set and the process proceeds to step S106, if it is determined in step S104 that the frame number count value Fcount ≠ 1, the process immediately proceeds to step S106.
Proceed to the processing of 106.

In step S106, the film feed motor 10 is driven in the normal direction to interlock the fork portion 6 engaged with the film spool 3 via the feed transmission device 7 and the film 1 is fed out. . Then, in step S107, the control circuit 20 determines whether or not there is an input from the PI 14 based on the rotation of the film feeding motor 10. If there is such an input, the rotation of the PI 14 is performed in step S108. Increment the number of pulses PIx, PIx = PIx
The value is set to +1 and the process proceeds to step S109. On the other hand, if there is no input from the PI 14 in step S107, the process immediately proceeds to the next step S109.

In step S109, the control circuit 2
0 is equal to the number of rotation pulses PIx of the film feeding motor 10 multiplied by 0.8 for the number of rotation pulses PIlast for the previous frame (PIx = 0.8 × PIlast).
And if they are equal, that is, PIx = 0.8 ×
If it is PIlast, the PR8 is turned on in step S110, the short brake is applied to the film feeding motor 10 in step S111 to reduce the film feeding speed, and the process proceeds to the next step S112. In step S109 above, PIx
If ≠ 0.8 × PIlast, the process immediately proceeds to step S112. In this case, the rotation pulse number PIx of the film feeding motor 10 is set to a value obtained by multiplying the rotation pulse number PIlast by 0.8 as a comparison value because the braking is performed just before the end of the winding of one frame of the film 1. The optical recording area 23 of the film 1
This is because the PR8 is turned on after passing through, so the above multiplier = 0.8 may be set to an arbitrary constant less than 1, or by using empirical data obtained by experiments or the like. Even better.

In step S112, whether or not the rotation pulse number PIx of the PI 14 has reached a value (PIx = 1.5 × PIlast) obtained by multiplying the rotation pulse number PIlast by 1.5 in order to detect the film end. It is determined whether the number of rotation pulses is PIx = 1.5 × PIlas
If t has not been reached, it is determined in step S117 whether or not the first perforation 4b of the shooting frame 5 (n-1: previous frame) is detected. It should be noted that the above multiplication value = 1.5 is an example, and one or more appropriate values capable of detecting the film end may be set based on an experiment or the like.

In step S117, the above (n
-1) When the first perforation 4b of the frame cannot be detected, the winding operation of the film 1 is further continued, the process is repeated by returning to steps S107 to S108 described above, and the rotation pulse number PIx is counted up. Will be done.

On the other hand, in step S117,
When the first perforation 4b of the (n-1) th frame is detected, PR8 is turned off in step S118, and then in step S119, the rotation pulse number PIx at the time of perforation detection is set to the rotation pulse number. It is stored in the memory 18 inside the control circuit 20 as PIlast (PIlast = PIx). Further, the film feeding is continued even after the first perforation 4b of the (n-1) th frame is detected in step S117, and the film feeding for a predetermined pulse is performed in step S120.

In step S121, it is determined whether or not the predetermined number of pulses has been reached. Here, by the film feeding of a predetermined number of pulses, the photographing opening 24 is formed.
The shooting frame 5 (n: the next frame) is set at. When it is determined that the predetermined pulse number has been reached, the brake is applied for a time sufficient to stop the film feeding motor 10 to stop the film feeding, and in the next step S123, After waiting for a predetermined time (WAIT), the film feeding motor 10 is turned off in step S124. Then, in step S125, the frame number count value Fcount
Is incremented, and Fcount = Fcount +
Then, the sequence for winding one frame is completed (return).

On the other hand, in step S112, if the first perforation 4b of the photographing frame 5 (n: the next frame) cannot be detected even if the rotation pulse number PIx becomes 1.5 times the rotation pulse number PIlast. Is regarded as the film end, the film feeding motor 10 is braked to stop the film feeding in step S113, and after waiting for a predetermined short time (WAIT) in step S114, In S115, the film feeding motor 10 is turned off (OFF), and in step S116, the rewinding operation of the film 1 (described later) is performed, and then this one-frame winding sequence is ended (return).

When the number of rotation pulses PIx = 0.8 × PIlast in step S109,
Every time the operations of steps S109 to S111 are repeated, the short brake is applied in step S111. However, if it is possible to sufficiently decelerate with one short brake, it is not necessary to apply the short brake every time. Of course.

The photoreflector (PR) 8 serving as a perforation detecting means on the film 1 is also provided.
As shown in FIG. 3B, the arrangement of the
With respect to the photographic frame 5 (n) set to, the optical recording area 23 between the first perforation 4b and the second perforation 4c of the next photographic frame ((n + 1): next frame) is arbitrarily opposed. If it is arranged at the position of (5), in the processing in step S117 in FIG.
1) It may be determined whether or not the first perforation 4b of the frame is detected.

FIG. 6 is a flow chart showing another sequence of one-frame winding in the camera to which the film feeding apparatus of the first embodiment is applied. One-frame winding of the film 1 in step S7 of FIG. 4 described above. Is a detailed description of another sequence of the above. The arrangement of the photo reflector (PR) 8 which is the perforation detecting means on the film 1 is shown in FIG.
As shown in, the PR 8 is set at an arbitrary position facing the optical recording area 23 between the film end detection perforation group 4d and the second perforation 4c of the final photographing frame 5b (n) set in the photographing opening 24. It is assumed to be installed.

As shown in FIG. 6, first, a film end detection perforation group 4 for notifying the film end.
When d is detected, it is determined whether or not the END flag = 1 (S201). Where END
When the flag is not 1, the PR8 is off (OF
F) is determined (S202), the P
If R8 is in the ON state, the PR8 is turned off and the process proceeds to the next process (S203).

On the other hand, in step S201 described above,
If the END flag = 1, the film rewinding operation is performed (S225), and this another sequence of one frame winding is ended (return).

Next, the control circuit 20 initializes the rotation pulse number PIx of the PI counter for detecting the rotation amount of the film feeding motor 10 to PIx = 0 (S204), and the frame number count value Fcount = 1, that is, Fcount = 1. Then, it is determined whether the number of shots is a value corresponding to the first shot (S205). Here, when the frame number count value Fcount = 1, which indicates immediately after the end of the preloading, there is no data of the rotation pulse number PIlast obtained at the previous one-frame feeding, so the initialization is performed. , For example,
The rotation pulse value of PIlast = 10 is given to PIlast, and the process proceeds to the next process (S206).

Then, by driving the film feeding motor 10 in the normal direction, the fork portion 6 engaged with the film spool 3 is interlocked via the feeding transmission device 7 and the film 1 is fed out ( S207). And
The control circuit 20 determines whether or not there is an input from the PI 14 based on the rotation of the film feeding motor 10 (S208), and when there is an input from the PI 14, the rotation pulse number PIx of the PI 14 is incremented. Then, PIx = PIx + 1 is set and the process proceeds to the next process (S2).
09).

Next, it is determined whether or not the film end detection perforation group 4d is detected (S21).
0). Here, when the film end detection perforation group 4d is detected, the END flag is set to 1 (S211), while when it is not detected, the process proceeds to the next step S212.

Then, the control circuit 20 determines whether the rotation pulse number PIx of the film feeding motor 10 is equal to the value obtained by multiplying the rotation pulse number PIlast for the preceding one frame by 0.8 (PIx = 0.8 ×). PIlast) is determined (S2
12) If they are equal, PR8 is turned on (S213), and the film feeding motor 10 is short-brake to reduce the film feeding speed (S21).
4). The value obtained by multiplying the rotation pulse number PIlast by 0.8 is used as the comparison value in order to start the braking operation shortly before the end of the winding of one frame. This is because the PR8 is turned on after passing through the recording area 23. Therefore, the multiplier = 0.8 may be an arbitrary constant less than 1, and empirical data obtained by experiments or the like should be used. Even better according to.

Next, it is judged whether or not the first perforation 4b of the photographing frame 5 (n) is detected (S21).
5) If the first perforation 4b of the photographing frame 5 (n) is not detected, the film 1 is further wound, the process returns to the above-described step S208, and the rotation pulse number PIx is determined in step S209. It will be counted up.

On the other hand, when the first perforation 4b of the photographed frame 5 (n) is detected (S215),
First, after PR8 is turned off (S216),
The rotation pulse number PIx at the time of perforation detection in step S215 described above is set to the rotation pulse number PIlast.
(PIx = PIlast) is set and stored in the memory 18 inside the control circuit 20 (S217).

Even after the first perforation 4b of the photographing frame 5 (n) is detected in step S215, the film feeding is continued, and the film feeding is performed by a predetermined number of pulses (S218). , It is determined whether or not the predetermined number of pulses has been reached (S21).
9). Here, the film frame 5 is set in the photographing opening 24 by feeding the film with a predetermined number of pulses.

When the predetermined number of pulses is reached in step S219, the film feed motor 10 is braked for a sufficient time to stop the film feed motor 10. The feeding is stopped (S220), and after waiting for a predetermined time (WAIT) (S221), the film feeding motor 10 is turned off (S222).

Then, the frame count value Fcount is incremented, and Fcount = Fcount +
When it is set to 1 (S223), another sequence for winding one frame is completed (return).

As described above, according to the film feeding device for the camera of the first embodiment, after the perforation 4 of the film 1 is detected, a predetermined amount of driving is performed and then the film feeding is stopped. Therefore, the degree of freedom in arranging the photoreflector (PR) 8 as a perforation detecting means can be increased without being limited to the position where the perforation 4 of the film 1 is arranged, and the layout of the internal mechanism of the camera can be improved. It will be easier.
Therefore, the space can be efficiently used, which can contribute to downsizing of the camera.

Next, the film feeding device of the camera of the second embodiment of the present invention will be explained. Since the second embodiment is basically the same as the above-mentioned first embodiment, the configuration of the film feeding device and the schematic sequence of the entire photographing by the camera are the same as those of the first embodiment. By referring to FIGS. 2 and 4 described above,
The description will be omitted because it is redundant.

FIG. 7 is a diagram showing the arrangement of photo reflectors (PR) in the camera of the second embodiment. Figure 7
As shown in, the final frame 5b (n +
In the state where 1) is set in the photographing opening 24, a photoreflector which is a perforation detecting means of the film 1 is provided at a position on the camera body side facing the second perforation 4c of the final photographing frame 5b (n + 1). (PR) 8 is provided.

FIG. 8 is a flow chart showing a sequence of winding one frame in the camera of the second embodiment, and step S7 of the overall sequence of the photographing by the camera described in the first embodiment (FIG. 4). 2 is a detailed description of a sequence of a second embodiment of winding one frame of the film 1 in FIG.

As shown in FIG. 8, first, a film end detection perforation group 4 for notifying the film end.
When d is detected, it is determined whether or not the END flag = 1 (S301). Where END
When the flag is not 1, the PR8 is off (OF
F) is determined (S302), the P
If R8 is in the ON state, the PR8 is turned OFF and the process proceeds to the next process (S303).

On the other hand, in step S301 described above,
When the END flag = 1, the film rewinding operation is performed (S323), and the sequence of one frame winding is ended (return).

Next, the control circuit 20 initializes the rotation pulse number PIx of the PI counter for detecting the rotation amount of the film feeding motor 10 to PIx = 0 (S304), and the frame number count value Fcount = 1, that is, Then, it is determined whether the number of shots is a value corresponding to the first shot (S305). Here, when the frame number count value Fcount = 1, which indicates immediately after the end of the preloading, there is no data of the rotation pulse number PIlast obtained at the previous one-frame feeding, so the initialization is performed. , For example,
The rotation pulse value of PIlast = 10 is given to PIlast, and the process proceeds to the next process (S306).

Then, by driving the film feeding motor 10 in the normal direction, the fork portion 6 engaged with the film spool 3 is interlocked via the feeding transmission device 7 and the film 1 is fed out ( S307). And
The control circuit 20 determines whether or not there is an input from the PI 14 based on the rotation of the film feeding motor 10 (S308). If there is an input from the PI 14, the rotation pulse number PIx of the PI 14 is incremented. Then, PIx = PIx + 1 is set and the process proceeds to the next process (S3).
09).

Next, it is determined whether or not the film end detecting perforation group 4d is detected (S31).
0). Here, when the film end detection perforation group 4d is detected, the END flag is set to 1 (S311), while when it is not detected, the process proceeds to the next step S312.

Then, the control circuit 20 determines whether the rotation pulse number PIx of the film feeding motor 10 is equal to the value obtained by multiplying the rotation pulse number PIlast for the preceding one frame by 0.8 (PIx = 0.8 ×). PIlast) is determined (S3
12) If they are equal, the PR8 is turned on (S313), and the film feeding motor 10 is short-braked to reduce the film feeding speed (S31).
4). The value obtained by multiplying the rotation pulse number PIlast by 0.8 is used as the comparison value in order to start the braking operation shortly before the end of the winding of one frame. This is because the PR8 is turned on after passing through the recording area 23. Therefore, the multiplier = 0.8 may be an arbitrary constant less than 1, and empirical data obtained by experiments or the like should be used. Even better according to.

Next, the second image of the final frame 5b (n + 1) is taken.
It is judged whether or not the perforation 4c is detected (S315), and when the second perforation 4c of the final photographing frame 5b (n + 1) is not detected, the film 1 is further wound, and the above-mentioned step is performed. Returning to the processing of S308, the rotation pulse number PIx is counted up in step S309.

On the other hand, if the second perforation 4c of the final photographed frame 5b (n + 1) is detected (S
315), first after PR8 is turned off (S) (S
316), the rotation pulse number PIx at the time of perforation detection in step S315 described above is set to the rotation pulse number P.
Ilast (PIx = PIlast) is set and stored in the memory 18 inside the control circuit 20 (S317).

Then, the film feeding motor 10 is braked for a sufficient time to stop the film feeding motor 10 and the film feeding is stopped (S31).
8) After waiting for a predetermined time (WAIT) (S3
19), the film feed motor 10 is turned off (S320).

Then, the frame number count value Fcount is incremented, and Fcount = Fcount +
When it is set to 1 (S321), the sequence for winding one frame in the second embodiment is ended (return).

As described above, according to the film feeding device for the camera of the second embodiment, the same effect as that of the film feeding device for the camera of the first embodiment can be obtained. Further, as described above, by disposing the perforation detecting means (PR8) from the optical recording area 23 of the film 1 on the upstream side in the film feeding direction, that is, on the second perforation 4c of the final photographing frame 5b. The final filmed frame can be detected without increasing special means or members, and the film rewinding operation can be swiftly performed without the need to draw the film extra.

FIG. 9 is a block diagram of the camera of the third embodiment of the present invention. Since the camera of the third embodiment has basically the same configuration as that of the first embodiment described above, the description of the same components will be omitted because the description is duplicated. Only the different parts will be described below with reference to. Also in FIG. 9, members other than those related to the present invention are omitted in order to avoid complication of the drawing.

As shown in FIG. 9, in the film feeding device of the camera of the third embodiment, the photoreflector which is the perforation detecting means applied in the film feeding device of the camera of the first embodiment. Instead of the optical recording device 21 composed of the (PR) 8 and the LED, etc., a photo sensor 2 which is a perforation detecting means.
6 and a light emitting element drive circuit 29 are provided.

That is, in the film feeding path near the photographing opening 24, a photo sensor 26 as a perforation detecting means is arranged on the camera body side at a position facing the perforation 4 of the film 1 and the optical recording area 23. The photo sensor 26 detects the perforation 4. The signal detected by the photo sensor 26 is
The signal is input to the control circuit 20 via the signal processing circuit 15. The photo sensor 26 also serves as an optical recorder for recording optical data in the optical recording area 23 of the film 1, is connected to the control circuit 20 via the light emitting element drive circuit 29, and is controlled by the control circuit 20. It is supposed to be done.

As shown in FIG. 9, the photosensor 26 is arranged at a position facing the perforation 4 on the downstream side of the optical recording area 23 of the film 1 in the film feeding direction, or in the vicinity thereof. To be installed in.

FIG. 10 shows the structure of the photo sensor 26 in the camera of the third embodiment. FIG. 10 (A)
The photo sensor 26 shown in FIG.
7b and one light receiving element 28. The light emitting element 27a irradiates the film 1 with infrared light and monitors the reflected light by the light receiving element 28,
The perforations 4 on the film 1 are detected, the light emitting elements 27a and 27b are vertically arranged, and a mask plate (not shown) is arranged on the front side thereof. The mask plate is provided with openings so that the light from the light emitting elements 27a and 27b becomes vertically long slit light.

The photo sensor 26 is driven by the light emitting element driving circuit 29 when the film 1 is wound up, and optically records information as a binary code in the optical recording area 23 of the film 1.

The photo sensor 26 shown in FIG.
Two light emitting elements 27a and 27b and one light receiving element 28
The light receiving element 28 is arranged at a position facing the light emitting element 27a. Needless to say, the light emitting element 27b need not be provided unless the information obtained by the photo sensor 26 needs to be a binary code.

FIG. 11 is a flow chart of a sequence showing an outline of the whole photographing by a camera to which the film feeding apparatus of the third embodiment is applied. First, the patrone body 2 is placed in a patrone chamber (not shown) provided in the camera body.
Are loaded (S401). Then, the control circuit 20
Is the opening 24 for shooting the first shooting frame 5a of the film 1.
The preload for setting to, that is, the initial feeding of the film is started (S402).

Next, the photographer film 1
When it is desired to rewind, when the midway rewind switch (not shown) of the camera body is operated (S403), the control circuit 20 executes forced rewind (S404). On the other hand, in step S403, when shooting is continued, the control circuit 20 waits until the release button 17 is pressed (S405), the release button 17 is pressed, and the control circuit 20 receives a release-on signal. Then, the exposure is started (S406).

When the exposure is completed, the control circuit 20 drives the film feeding motor 10 through the motor driving circuit 12 to wind the film 1 by one frame, and at the same time, the light emitting element driving circuit 29 is driven. Through the photo sensor 26, shooting information such as exposure data and enlargement magnification is recorded in the optical recording area 23 of the film 1 via the photo sensor (S407).

Then, it is judged whether it is the film end (S408), and when it is judged that the film is the film end, the control circuit 20 executes the rewinding operation of the film 1 (S409). If it is determined that it is not the film end, for the next shooting (exposure), the process returns to the processing of step S401 described above, and the standby state is maintained until the release button 17 is pressed again. Will be repeated.

FIG. 12 is a flow chart showing a sequence of one frame winding in the camera to which the film feeding apparatus of the third embodiment is applied, and the sequence of one frame winding of the film 1 in step S407 of FIG. 11 described above. Will be described in detail.

First, when the film feed motor 10 is driven in the normal direction, the film spool 3 is fed through the feed transmission device 7.
The fork portion 6 engaged with is driven, and the film 1 is sent out (S501). At this time, during the film feeding, the photo sensor 2 is driven through the light emitting element drive circuit 29.
6 imprints optical data, such as exposure data and enlargement magnification data, on the optical recording area 23 of the film 1 (S502).

Subsequently, in step S502, it is determined whether or not the optical sensor imprinting of the optical data has been completed. If it is determined that the optical data imprinting has been completed, the following processing is performed. Proceed to (S503). At this time, film feeding is continued.

Then, it is judged whether or not the second perforation 4c of the photographed frame 5 (n: photographed frame) is detected (S504). If the second perforation 4c is detected, the film is fed. By applying a short brake to the motor 10, the film feeding speed is reduced (S505). Then, the final shooting frame 5
It is determined whether or not the first perforation 4b of b (n + 1) is detected (S506). When the first perforation 4b is detected, the process proceeds to the next process (S506).

Next, in order to stop the film feeding,
The film feed motor 10 is further braked for a sufficient time to stop the film feed motor 10 (S507). Then, wait for a predetermined time (WAI
After T) (S508), the film feeding motor 10 is turned off (OFF) (S509), and the sequence for winding one frame in the camera of the third embodiment ends (return).

In the first, second and third embodiments described above, the film having two perforations for each photographed frame is illustrated, but the number of perforations for each photographed frame is not limited to this. The same applies even if a film having one or three or more perforations is used for one frame of the photographed frame without being processed.

As described above, according to the film feeding device for the camera of the third embodiment, the same effect as that of the film feeding device for the camera of the first embodiment can be obtained. Further, in the third embodiment, the photosensor 26 is used for both the detection of the perforation 4 of the film 1 and the recording of the optical data in the optical recording area 23 of the film 1, so that the number of parts is reduced. As a result, it is possible to contribute to reduction in manufacturing cost, further improve space efficiency, and contribute to miniaturization of the camera.

Further, the arrangement of the photo sensor 26 is
The photo sensor 26 detects the perforation 4 because the photo sensor 26 is arranged at a position facing the perforation 4 on the downstream side of the optical recording area 23 of the film 1 in the film feeding direction. At the same time, since the optical recording area 23 of the film 1 passes over the photo sensor 26 during the film feeding, the optical data is imprinted (optical recording).
Can be done easily.

[Supplementary Notes] (1) Film feeding means for feeding a film, and perforation detection means for optically detecting perforations provided on the film and optically recording information on the film. A feed amount detecting means for detecting the feed amount of the film by the film feeding means,
During film feeding by the film feeding means, control means for causing the perforation detecting means to record information based on the outputs of the perforation detecting means and the feeding amount detecting means, Sending device.

(2) In a film feeding device of a camera using a film in which a normal perforation and a final frame perforation representing a final frame for photographing are used, a film feeding means for feeding the film, When the last frame for photographing is fed to a position facing the photographing opening portion of the camera, it is arranged on the upstream side in the film feeding direction with respect to the portion where the perforation for the last frame is located, and is provided on the film. And perforation detection means for detecting the perforation,
A film feeding device for a camera, comprising: a control means for stopping the feeding operation of the film feeding means when the perforation detecting means detects the last frame perforation.

(3) In the film feeding device of the camera described in the above-mentioned Supplementary Note 2, one normal perforation is provided for each shooting frame, and a plurality of final frame perforations are provided. ing.

[0085]

As described above, according to the present invention, the film end is detected before the shooting frame is set in the shooting opening, so that the degree of freedom in the arrangement of the perforation detection means is increased. Further, it is possible to provide a film feeding device for a camera, in which optical information recording is performed without increasing the number of members.

[Brief description of drawings]

FIG. 1 is a plan view showing the structure of a film applied to a camera of the present invention.

FIG. 2 is a block configuration diagram of the camera of the first embodiment of the present invention.

3 is a view showing the arrangement of photo reflectors (PR) in the camera of FIG.

FIG. 4 is a flowchart of a sequence showing an outline of overall shooting by the camera of FIG.

5 is a flowchart showing a sequence of winding one frame in the camera shown in FIG.

6 is a flowchart showing another sequence of winding one frame in the camera shown in FIG.

FIG. 7 is a view showing the arrangement of photo reflectors (PR) in the camera of the second embodiment of the present invention.

FIG. 8 is a flowchart showing a sequence of winding one frame in the camera of the second embodiment of the present invention.

FIG. 9 is a block configuration diagram of a camera of a third embodiment of the present invention.

FIG. 10 is a diagram showing a configuration of a photo sensor in the camera of the third embodiment of the present invention.

FIG. 11 is a flowchart of a sequence showing an outline of overall shooting by the camera of the third embodiment of the present invention.

FIG. 12 is a flowchart showing a sequence of winding one frame in the camera of the third embodiment of the present invention.

[Explanation of symbols]

1 ... Film 2 ... Film cartridge 3 ... Film spool 4 ... Perforation 8 ... Photo reflector (PR, perforation detection means) 10 ... Film feeding motor (film feeding means) 11 ... Take-up spool 13 ...... Encoder 14 ...... Photo interrupter (PI, feeding amount detecting means) 20 ...... Control means (feeding control means) 21 ...... Optical recorder 23 ...... Optical recording area (film) 26 ...... Photo sensor (perforation) Detection means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Toshiyuki Toyofuku Toshiyuki Toyofuku 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Yasushi Koiwai 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Shinya Takahashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (3)

[Claims] 1. A film feeding means for feeding a film, a perforation detecting means for detecting a perforation provided on the film, and a feeding amount detecting means for detecting a feeding amount of the film by the film feeding means. A film feed control means for stopping the film feed of the film feed means after the perforation detection means has detected the perforation and fed a predetermined amount. Sending device. 2. A film feeding means for feeding a film, a perforation detecting means for detecting a perforation provided on the film and recording information on the film, and a feeding amount of the film by the film feeding means. And a control for causing the perforation detection means to record information based on the outputs of the perforation detection means and the feed amount detection means during the film feeding by the film feeding means. A film feeding device for a camera, comprising: 3. The film feeding apparatus for a camera according to claim 1, wherein the perforation detecting means is arranged upstream of an information recording area of the film along a film feeding direction.