JPH11102011A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically switch the position of a pressure plate, in a middle- sized camera. SOLUTION: Transparent windows 22a and 22b are provided in a film path 13 and a film sensor is provided in the transparent window 22a. A bar code sensor is provided in the transparent window 22b. Pushing cams are rotated and controlled in accordance with the kind of a film after being read by the bar code sensor. Thus, pushing pins 51 are shifted and the tunnel gaps between film rails 40 and 41 and the pressure plate 42 are switched to ones corresponding to the loaded photographic film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using photographic films having different film thicknesses, such as a brownie size 120 roll film and a 220 roll film.

[0002]

2. Description of the Related Art Brownie-size roll films are:
Since it does not have a cartridge (patrone), it is commercially available wrapped in a roll on light-shielding backing paper. As the roll film of this brownie size, a 120 roll film and a 220 roll film are provided, both of which have the same film width.

[0003] A 120-roll film uses a film, a backing paper longer than the film, and a bonding tape for bonding these films together, with the leading and trailing edges of the backing paper being left behind.
The front and rear ends of the film are attached to the backing paper with bonding tape. Thereby, the backing paper portion on the front end side of the joining tape on the front end side becomes the leader paper, and the backing paper portion on the rear end side of the joining tape on the rear end side becomes the trailer paper. This 120 roll film is currently 6x
At 4.5 size, 8 shots and 16 shots are commercially available. The 220 roll film is a form in which a leader paper and a trailer paper each consisting of a backing paper are attached to only the leading end side and the trailing end side of the film with a bonding tape, and at present 32 shots are commercially available.

Accordingly, when a roll film is set in the aperture of the camera, the thickness of the 120-roll film is larger than that of the 220-roll film by the thickness of the backing paper. Therefore, using a mechanism for changing the tunnel gap so that the film emulsion surface is in the correct focus position, a 120
When a roll film is used, the gap between the tunnels between the film rail and the pressure plate is widened, and when a 220 roll film is used, the gap between the tunnels is narrowed.

[0005] As a mechanism for switching the gap in the tunnel, for example, in the case of New Mamiya 6 (trade name of Mamiya OP Co., Ltd.), the back plate is opened and the press plate provided inside the back cover is turned 90 degrees so that the press plate is turned. When it is moved back and forth and set at a position for a 220 roll film, the pressure plate abuts against the pressure plate receiving surface, and when set for a 120 roll film, the pressure plate slightly separates from the pressure plate receiving surface. Also,
In the case of Fuji GSW680III Professional (trade name) provided by the present applicant, the back cover is opened, the pressure plate of the back cover is once removed, the back and front sides of the pressure plate are replaced and then re-attached. Changes. Further, Fuji GA6 provided by the present applicant.
In the case of 45 Professional (trade name), the back cover is opened, and the gap between the tunnels is changed by sliding the pressure plate toward the back cover side along the film feeding direction.

[0006] As described above, in any camera using a brownie-sized roll film, the operation of switching the gap in the tunnel cannot be performed unless the back cover is opened and the pressure plate inside the back cover is exposed. Therefore, even if you notice that the tunnel gap is not appropriate after loading the film, closing the back cover, and winding up the film,
There is a problem that the position of the pressure plate cannot be easily corrected. If the pressure plate position is inappropriate and the tunnel gap is wide, the focus will be rough, and if the tunnel gap is small, there will be problems such as scratching the film. For this reason, as disclosed in Japanese Utility Model Publication No. 48-33284, a knob is provided on the back cover and the knob is slid to change the support position of the pressure plate in the photographing optical axis direction, thereby changing the tunnel gap. Has also been proposed.

[0007]

However, there is a problem that automation using a knob or the like from the outside cannot be easily adapted to automation.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a camera capable of automatically setting a tunnel gap in accordance with the type of photographic film loaded in the camera. I do.

[0009]

According to a first aspect of the present invention, there is provided a camera according to the first aspect, wherein a bar code reader is provided at a position facing a film path, and a bar code read by the bar code reader is provided. And a tunnel gap changing means for changing the tunnel gap according to the film type from the film discriminating means.

In the camera according to the present invention, a film sensor is provided at a position facing the film passage between the film storage chamber and the aperture, and at a position facing the film passage between the aperture and the film winding chamber. The bar code reading means provided, the film sensor detects a joint portion on the leading end side of the film, the film feeding means for feeding the film based on the detection, and the bar code reading means reads the bar code. It is provided with film discriminating means for discriminating the film type based on the read bar code, and tunnel gap changing means for changing the tunnel gap in accordance with the film type from the film discriminating means.

The film feeding means feeds the film for setting the first frame of the film in the aperture, and during the feeding of the film by the film feeding means, the film sensor keeps the film leading end even after a certain time has passed. Means for displaying a film setting error when the joint portion on the side is not detected. Further, it is preferable to include a means for displaying a bar code reading error when the bar code is not read by the bar code reading means even after a certain time has elapsed. Further, it is preferable that a means for displaying a film feed error is provided when the film feed amount does not reach the predetermined value even after the predetermined time has elapsed. Further, it is preferable that a means is provided for displaying a film feed error when the film sensor has not detected the film after the completion of the film feed.

It is preferable that a film type setting means is provided for setting the tunnel gap to a passage width of a film requiring a maximum width when a barcode reading error occurs. The passing width of the film requiring the maximum width is preferably a width for a 120 type film.

It is preferable that a film type setting means is provided for setting the number of shootable films having the maximum specified number of shots when a barcode reading error occurs. It is preferable that the number of shootable films of the film having the maximum specified number of shoots is the number of 220 type films.

When a bar code reading error occurs, it is preferable to have a film type setting means for setting the film sensitivity to the film sensitivity of the most frequently used film. The most frequently used film preferably has a film sensitivity of ISO100. Further, it is preferable to provide a film type setting means for setting the film type to the film type of the most frequently used film when a barcode reading error occurs. The film type of the most frequently used film is preferably a negative color film.

[0015]

FIG. 2 shows the camera body 11 with the back cover 10 opened, as viewed from the back. On both sides of the film passage 13 having the aperture 12, a film supply chamber 14 and a film winding chamber 15 are arranged. The film supply chamber 14 is loaded with a brownie-sized photographic film 16, and the film winding chamber 15 is loaded with an empty spool 17. A spool rotation shaft 18 (see FIG. 3) enters the rotation hole 17a of the empty spool 17, and the film 16 is wound around the empty spool 17 by the rotation of the spool rotation shaft 18.

The brownie-size photo film 16 is
It is in a form wound around the spool 17 in advance,
The film is loaded into the film supply chamber 14 as it is. After loading,
The leading end of the leader paper is inserted into the groove 17b of the spool 17 in the film take-up chamber 15, and the spool 17 is rotated in the film winding direction by pressing a winding button (not shown). Wrap for only a minute. A locking hole is provided at the leading end of the leader paper, and the locking hole is formed in the groove 1 of the spool 17.
In the case of a photographic film that is to be engaged with a claw provided in the 7b, it is only necessary to insert the leading end of the leader paper into the groove and lock the claw with the locking hole. The winding operation becomes unnecessary. After this, the hinge 19
When the back cover 10 is closed with the center at the center, the detection pin 20 is pushed by the back cover 10, the back cover switch 21 (see FIG. 4) is turned on, and the closed position of the back cover 10 is detected. In conjunction with this detection, the initial film feed is automatically performed as described later.

A transparent window 22a is provided in the camera body side passage surface 13a constituting the film passage 13. In this transparent window 22a, as shown in FIG.
A film sensor 23a for detecting the passage of an image is provided. The joining tape 16c is for joining the backing paper 16a and the film 16b. The joining tape 16c overlaps the film 16b on the backing paper 16a and is attached to the overlapped portion. The film sensor 23a is composed of a photo sensor, and the photo film 1 in the film passage 13 is
6 is irradiated with infrared light and receives reflected light. The film sensor 23a outputs a photoelectric signal having a signal level corresponding to the intensity of the received reflected light, and sends the signal to the controller 25. The controller 25 detects the passage of the bonding tape 16c based on the difference in the reflectance of the photographic film 16 based on the signal from the film sensor 23, and controls the initial film feed and the final film feed based on this.

A transparent window 22b is provided on a camera body side passage surface 13b constituting a film passage 13 between the aperture 12 and the film winding chamber 15. This transparent window 22
As shown in FIG. 4, a barcode sensor 23b is arranged in the area b. The bar code sensor 23 includes a photo sensor, irradiates the photo film 16 in the film path 13 with infrared rays, and receives light reflected from the bonding tape 16c. Then, a photoelectric signal having a signal level corresponding to the intensity of the received reflected light is output and sent to the controller 25. The bar code 24 is recorded on the surface of the joining tape 16c, and a combination of two types of black bar and white bar having different widths is used to determine the film type, film sensitivity,
Data of the number of films is recorded. The controller 25 decodes a barcode based on a signal from the barcode sensor 23b.

As shown in FIG. 2, the film winding chamber 15
A counter roller 26 that rotates in contact with the photographic film 16 is disposed in the film passage side portion of the inside. As shown in FIG. 3, the gears 27, 2
The transport encoder 29 is connected via the control unit 8. The transport encoder 29 includes an encoding plate 29a, a photo interrupter 29b, and a pulse generator 29c (see FIG. 4). The slits are formed radially at a constant pitch in the encoding plate 29a. The photo interrupter 29b detects the passage of the slit of the encoding plate 29a. The pulse generator 29c generates one pulse (carrier pulse) when the photo interrupter 29b detects a slit. This transport pulse is sent to the controller 25
Sent to

The controller 25 rotates the film feed motor 35 via a driver 35a. Further, the controller 25 starts counting the number of transport pulses from the transport encoder 29 based on the timing of detecting the passage of the joining tape from the film sensor 23a. Then, the controller 25 detects that the first frame of the photo film 16 has been set in the aperture 12 when the count value reaches a predetermined constant value N1. In one-frame feed after shooting, the controller 25 determines whether or not the number of transport pulses from the transport encoder 29 has reached one-frame advance, and performs frame advance.

As is well known, a photometric unit 30, an AF unit 31, an exposure unit 32, a release switch 33, a liquid crystal display panel (LCD) 34, and the like are connected to the controller 25. Will be

As shown in FIG. 2, film rails 40 and 41 are arranged above and below the aperture 12. Each of the film rails 40 and 41 slightly protrudes toward the back cover 10 and is formed of a narrow ridge formed long in the film feeding direction. Surfaces (film running surfaces) 40a and 41a parallel to the pressure plate 42 are in contact with both side edges outside the screen range on the film emulsion side, and serve as guide surfaces during film running.

Under the upper film rail 40 and below the lower film rail 41, the film rails 40, 4 are provided.
1 are provided with pressure plate receiving rails 43 and 44 each comprising a pair of narrow ridges. As shown in FIG. 5, a surface 43a of the upper pressure plate receiving rail 43, which is parallel to the pressure plate 42,
The film rail 40 is formed so as to slightly project toward the back cover 10 from the film running surface 40 a of the film rail 40. Similarly, the lower pressure plate rail 44 is also configured. The distance between the upper end surface of the lower pressure plate receiving rail 44 and the lower end surface of the upper pressure plate receiving rail 43 is slightly wider than the film width. Therefore, the side surfaces of the photo film 16 are guided so as not to be shifted by these end faces. The step difference between the film running surfaces 40a, 41a of the film rails 40, 41 and the pressure plate receiving surfaces 43a, 44a of the pressure plate receiving rails 43, 44 corresponds to a thin film, in this embodiment, a 220 roll film. Tunnel gap G1, which is 0.235 ± 0.05 mm
Is set in the range.

As shown in FIG. 2, a pressure plate 42 is attached to the back cover 10 via a pair of mounting brackets 46 and guide pins 47 so as to be displaceable along the photographing optical axis direction. A pair of pressure plate springs 48 is provided between the back cover 10 and the pressure plate 42.
, Which urges the pressure plate 42 toward the film passage 13. Instead of attaching the pressure plate 42 to the back plate 10 via the mounting bracket 46 and the guide pin 47, the free end 48a of the pressure plate spring 48 is slidably held by the pressure plate, so that the pressure plate is attached to the back cover. Is also good.

Guide holes 50 are formed at positions slightly away from the four corners of the aperture 12 above the upper pressure plate receiving rail 43 and below the lower pressure plate receiving rail 44. These four guide holes 50 are formed in the photographing optical axis direction. A push pin 51 is arranged in the guide hole 50 so as to be able to protrude and retract in the direction of the photographing optical axis. Push pin 51
As shown in FIG. 5, the flange 51a hits the edge surface 50a of the guide hole 50 so as not to fall from the guide hole 50 toward the film passage 13 as shown in FIG.

As shown in FIG. 3, each push pin 51 is shifted by a push cam 55. The push cams 55 are arranged at positions corresponding to the push pins 51, and the upper and lower push cams 55 are connected via a connecting shaft 56. A gear 57 is coaxially fixed to the upper push cam 55, and the gear 57 is linked to a pressure plate position switching motor 36 via a pressure plate position switching reduction gear train 58.

When receiving the pressure plate position switching signal, the controller 35 rotates the pressure plate position switching motor 36. The pressure plate position switching gear train 58 reduces the rotation of the motor 36 and transmits the rotation to the push cam 55. Thereby, the pressing cam 55
Rotates to shift the push pin 51 in the optical axis direction.
Due to this shift, as shown in FIG. 5B, the tip of the push pin 51 protrudes from the pressure plate receiving surface 43a of the pressure plate receiving rail 43, and the tunnel gap between the film running surface 40a and the pressure plate 42 becomes G1. To G2. The pressing pin 51, the pressing cam 55, and the connecting shaft 56 constitute a pressure plate position switching unit 52. In the present embodiment, the push cam 55 on the film supply chamber side and the push cam 55 on the film take-up chamber side with respect to the aperture 12 rotate in opposite directions. It may be rotated in the direction.

As shown in FIG. 3, the pressure plate position switching motor 3
A motor speed encoder 68 is attached to the drive shaft 6. The motor rotation speed encoder 68 is configured similarly to the transport encoder 29, and
8a, a photo interrupter 68b, and a pulse generator (not shown). The photo interrupter 68b is
The passage of the notch of the encoding plate 68a is detected, and one pulse (motor rotation pulse) is generated in response to the detection. This motor rotation pulse is sent to the controller 25. The controller 25 is connected to the photointerrupter 68b.
By counting the number of pulses, the number of rotations of the pressure plate position switching motor 36 is obtained. Similarly, a spool rotation speed encoder 69 is also attached to the spool rotation shaft 18, and a photointerrupter 69 b detects a slit in the encoding plate 69 a to generate a spool rotation pulse corresponding to the rotation speed of the spool rotation shaft 18. And
This is sent to the controller 25.

As shown in FIGS. 5 and 6, in order to accurately set the tunnel gaps G1 and G2 for the 120 type and the 220 type, the shaft hole 60 of the push cam 55 has a long length in the photographing optical axis direction. It is formed in a hole. The shaft 55a of the push cam 55 is movably held by the shaft hole 60 in the photographing optical axis direction. Further, a cam spring plate 62 for urging the connecting shaft 56 toward the pressure plate 42 is provided. This cam spring plate 62
Is set to be larger than the urging force F2 of the pressure plate spring 48. FIG. 5 (B) and FIG. 6
As shown in (B), when the pushing cam 55 is at the shift position for the 120 type, the pushing pin 51 is displaced by the pushing cam 55 in the direction of the pressure plate by the shift amount S0.
Further, the cam spring plate 62 allows the flange 51 of the push pin 51 to be moved.
The pushing pin 51 is urged so that the contact hole a contacts the edge surface 50a of the guide hole 50. Thus, the push pin 51 always projects by a certain amount. Therefore, the running surfaces 40a of the film rails 40, 41 from the edge surface 50a of the guide hole 50,
The distance LG up to 41a and the distal end surface 51b of the push pin 51
By increasing the dimensional accuracy with respect to the distance LP from the to the flange 51a, even if there is a certain dimensional error in the shift amount of the push cam 55, the dimensional error is not affected, and The tunnel gap G2 with the film running surface 40a can be accurately maintained in the range of 0.4 ± 0.02 mm.

As shown in FIGS. 5A and 6A, when the push cam is at the shift position for the 220 type, the push cam 55 is moved in the shaft hole 60 toward the pressure plate in the direction of the pressure plate. However, since the amount of shift is minimal, the distal end 51b of the push pin 51 does not protrude beyond the receiving surface 43a of the pressure plate receiving rail 43 in the direction of the pressure plate. Press plate 4 on receiving surface 43a
2 is pressed by the pressure plate spring 48 so as to hit.

As shown in FIG. 3, a display drum 70 is disposed above a gear 57 for rotating the upper push cam 55 on the film supply chamber side. On the peripheral surface of the display drum 70, numerals "120" and "220" are displayed to indicate whether the tunnel gap is for 120 type or 220 type. The number of this display drum 70 is
It is observed from a display window (not shown) formed on the back surface of the camera body 11, so that it is possible to easily know what type of tunnel gap is currently set.

On the other side of the other upper push cam 45 from the push pin 41, a tunnel gap detecting switch 71 is arranged. The tunnel gap detection switch 71 contacts the peripheral surface of the pressing cam 55 and presses the contact piece 71a to make contact with the other contact piece 71b, so that the currently set tunnel gap is for 120 or 220. Is electrically detected.
This detection signal is sent to the controller 25. When the pressure plate position is switched by the pressure plate position switching operation after the initial feeding of the film, the controller 25 detects the tunnel clearance after the pressure plate position switching by the tunnel clearance detection switch 7.
1, the photo film set according to the result of the reading is specified. For example, if the tunnel gap is G1, it is determined that the film is 220 films, and the specified number of images is set to "32". If the tunnel gap is G2, it is determined that the film is 120 films, and the specified number of images is set to "16". Then, when the number of images reaches the specified number of images, the film is finally fed, and the photographic film is wound on a spool in the film winding chamber.

FIG. 4 is a block diagram for controlling a film feed system and a pressure plate switching system of the camera. As is well known, the controller 25 controls the respective units 30 to 32 in accordance with the operation of the release switch 33 and the like to perform photographing.
Film feed and pressure plate position switching are performed.

At the time of film feeding, the film feeding motor 35 is rotated, whereby the spool rotating shaft 18 rotates in the film winding direction, and the film 16 is spooled.
Take up to 7. The film feed includes a film initial feed, a one-frame feed, and a film final feed.

As shown in FIG. 1, the initial film feed is
This is automatically performed when the back cover 10 is closed after the photo film 16 is set in the camera, and the film 16 is sent until the first frame to be shot is set in the aperture 12.
For this reason, at the time of the initial film feed, the back cover switch 21 first detects whether or not the back cover 10 is closed.
When the back cover 10 is closed, the pressure plate position is read by the tunnel gap detection switch 71. And 2
In the case of the pressure plate position for 20, the pressure plate position switching process is performed so as to become the tunnel gap G2 which is the pressure plate position for 120. In the case of the pressure plate position for 120, it is left as it is. As described above, when the film is initially fed, the tunnel gap is set in the G2 for the 120 type, which is the maximum gap, so that not only the 120 type but also a 220 type film which is thinner is used. This also enables smooth film feed.

Next, the film feeding motor 35 is started, and the film feeding is started. Further, the safety timer is started when the film feeding motor 35 is started. Next, the film sensor 23a detects whether the joining tape 16c has passed. If the joining tape 16c cannot be detected even after a certain time has elapsed, it is determined that a film setting error has occurred, and a film setting error is displayed on the liquid crystal display panel 34. When the joining tape 16c is detected, the count of the number of transport pulses is started based on the detection timing. During the film feeding, the joining tape 16 is detected by the barcode sensor 23b.
The bar code 24 on c is read. The controller 25 determines the film type set in the camera based on the read signal of the barcode 24. Then, it is determined whether or not the number of transport pulses has reached a certain value N1, and
1, the film feed motor 35 brakes (5
(Reverse rotation of 0 ms), the motor 35 is stopped.

If the bar code 24 cannot be read even after a certain period of time, it is determined that a bar code reading error has occurred, and a bar code reading error is displayed on the liquid crystal display panel 34. In this case, the number of shots is set to "32" for a 220 roll film while the tunnel gap for a 120 roll film is set.
Therefore, since the spread rate is high, the setting is made for a 120-roll film which is likely to be loaded, so that even if the barcode cannot be read, the setting with few errors can be made. Moreover, when the tunnel gap is different from the one actually set, that is, when photographing on a 220 roll film in the 120 tunnel gap, a certain degree of image quality is ensured although the image is slightly out of focus.
Furthermore, since the specified number of shots is set for the 220 roll film, the shooting can be reliably performed up to the last shot when the 220 roll film is set. Similarly, the film sensitivity is set to the frequently used ISO 100, and the film type is set to the frequently used negative color film. Since the frequency of use greatly varies depending on individual differences between users, the various setting values set in the case of a barcode reading error may be set in advance by the user and stored in a memory.

If the number of transport pulses does not reach the fixed value N1 even after the lapse of a certain time, it is determined that a film feed error has occurred, and a display of the film feed error is displayed on the liquid crystal display panel 34. Next, after the film feed motor 35 is stopped, it is determined whether or not the film 16 is located at a position corresponding to the film sensor 23a based on the detection signal of the film sensor 23a. If the film 16 is present, it is determined that the initial film feed has been performed normally, and the display of the number-of-shots counter on the liquid crystal display panel 34 is set to "1". Thereafter, the camera enters a shooting standby state. If the film sensor 23a has not detected a film, it is determined that an abnormality has occurred in the initial film feed, and a film feed error is displayed on the liquid crystal display panel 34.

Thereafter, the pressure plate position is switched based on the film type signal read from the bar code. As shown in FIG. 7, in the pressure plate position switching process, first, whether the current pressure plate position is for 120 or 220 is read by the tunnel gap detection switch 71. Then, it is determined whether or not the read pressure plate position is the target position. If the read pressure plate position is not the target position, the pressure plate position switching motor 36 is started. In addition, a safety timer is started with the start of the motor. And
The tunnel gap detection switch 71 detects whether the pressure plate position has been switched. In the case of switching, the motor 36 is stopped after the brake (reverse rotation of 50 ms) is applied to the pressure plate position switching motor 36. Thereafter, the film type display on the liquid crystal display panel 34 is switched. If the pressure plate position is not switched within 2 seconds after the activation of the pressure plate position switching motor 36, after the pressure plate position switching motor 36 is stopped,
A pressure plate position switching error display is displayed on the liquid crystal display panel 34. In the error processing, a pressure plate position switching signal is input by a manual operation, and the pressure plate position switching processing is performed again. If the pressure plate position is not switched even in this error processing, a failure display is made on the liquid crystal display panel 34.

When the photographing of each frame is completed, the film feed motor 35 is rotated each time, and the film 16 is fed by one frame. At the time of this one frame feed, the counter roller 2
The number of transport pulses from the transport encoder 29 provided in 6 is counted, the feed amount for one frame is detected, and frame transport is reliably performed. Further, the display of the number-of-shots counter is displayed by adding 1 for each shooting.

When the photographing of all the frames is completed, the final feed of the film is performed as shown in FIG. In the final film feed, regardless of the film type, after the maximum tunnel gap G2 for 120 is set, the film feed motor 3
5 is activated, and all the photographed films are taken up on the spool. Thereafter, “E” indicating the completion of feeding is displayed on the liquid crystal display panel 34. In this state, open the back cover 10 of the camera and take out the photographed film.
The empty spool 17 is set in the film winding chamber 15. Thus, in the case of the final film feed, as in the case of the initial feed, G where the tunnel gap becomes the maximum gap is obtained.
Since it is set to 2, smooth film winding is possible.

The tunnel gap is automatically set according to the film type based on the bar code at the time of the initial film feed. Since the pushing cam 55 does not displace even when the power is turned off, the tunnel gap is maintained in a state corresponding to the type of the loaded film. Therefore, even if the power is turned off when the camera is not used, the tunnel gap does not change, and the tunnel gap corresponds to the loaded film type. Thereby, by confirming the display of the display drum 70 from the tunnel gap display window,
The type of the photo film 16 currently set can be easily known.

In the above embodiment, the pressure plate position is switched using the pressure plate position switching motor 36. In addition, as shown in FIG. 9, the film feed motor 35 and the planetary gear clutch 59 are switched as shown in FIG. With the rotation of the film feed motor 35, the film feed and the switching of the pressure plate position may be selectively performed. The same components as those in the embodiment shown in FIG. 3 are denoted by the same reference numerals.
In this case, as shown in FIG. 10, a planetary gear clutch 59 is connected to a sun gear 59a, a planetary gear 59b that rotates by meshing with the sun gear 59a, and a swing arm that makes the planetary gear 59b roll around the sun gear 59a. 59c and an arm shift unit 63.

The arm shift portion 63 is formed of a solenoid, and when not energized, the swing arm 59c is engaged with the drive gear 80 of the film feed gear train 61 (see FIG. 9) by a built-in coil spring 63a. , And transmits the rotation of the film feed motor 35 to the spool rotation shaft 18. When the solenoid is energized by the pressure plate position switching signal, the swing arm 59c
Rotates to the drive gear 81 side of the pressure plate position switching gear train 58, the rotation of the planetary gear 59b is transmitted to the pressure plate position switching gear train 58, and the pushing cam 55 rotates.

It should be noted that instead of forcibly changing the meshing position of the planetary gear 59b using the arm shift portion 63,
As shown in FIG. 11, by changing the rotation direction of the film feed motor 35, the meshing position of the planetary gear 59b on the sun gear 59a is changed, and the film feed motor 35
May be selectively transmitted to either the spool rotation shaft or the push cam. In this case, when the film feed motor 35 is rotated in the film feed direction, the sun gear 59a rotates clockwise, and with this rotation, the planetary gear 59b also rotates clockwise around the sun gear 59a to feed the film. With the drive gear 80 of the gear train 61.
Thus, the rotation of the film feed motor 35 is transmitted to the film feed gear train 61, and the spool rotating shaft 18 is rotated in the film winding direction to wind the film 16 around the spool 17. When the film feed motor 35 rotates in the direction opposite to the film feed direction, the planetary gears 59b
Meshes with the drive gear 81 of the pressure plate position switching gear train, and transmits the rotation of the film feed motor 35 to the push cam 55.

After the photographic film 16 is set in the film storage chamber 14 and the film is initially fed, if the tunnel gap is to be changed, the sun gear 59a rotates in the pushing cam rotation direction opposite to the film feeding direction. . Therefore, at this time, if the planetary gear 59b is engaged with the film feed-side drive gear 80, the film feed-side drive gear 80 slightly rotates at the beginning of rotation in the direction opposite to the film feed direction, thereby causing the spool rotation shaft to rotate. The film 18 rotates slightly in the direction opposite to the film winding direction, and the film 16 is loosened. Similarly, when the film is fed after the pressure plate position has been switched, if the planetary gear 59b is engaged with the pressure plate position switching drive gear 81 at the beginning of the frame feed, the pressure plate is slightly moved at the beginning of rotation. The position switching side drive gear 81 rotates in the reverse direction, thereby changing the shift position of the push cam 45.

In order to prevent the loosening of the winding and the change of the shift position, in this embodiment, as shown in FIG. 11, a double gear of an initial rotation absorbing type is used. This double gear
Two sub gears 80a, 80b are rotatably and coaxially overlapped with each other, and these sub gears 80a, 80b are engaged with engagement projections 80c, 80d provided on their respective opposing surfaces. The lower auxiliary gear 80a includes the upper auxiliary gear 8
0b, and four engaging projections 80 at a pitch of 72 °
c and one spring plate 80e are provided. The upper sub gear 80b has four engaging projections 80d at a pitch of 72 ° on a surface facing the lower sub gear 80a.
An engagement recess 80f for receiving the leading end of Oe is provided. The two auxiliary gears 80a and 80b are overlapped so that the tip of the spring plate 80e enters the engagement recess 80f. The spring plate 80e includes two sub gears 80a, 80
b is positioned at a neutral position where the gap between the engagement projections 80c and 80d is substantially the same.

Therefore, when the planetary gear 59b meshes with the auxiliary gear 80a of the film feed side drive gear 80 and rotates in the direction opposite to the film feed direction, the rotation is caused by the gap between the engaging projections 80c and 80d. Is not transmitted to the spool rotation shaft. The pressure plate position switching side drive gear 81 is also composed of auxiliary gears 81a and 81b having the same configuration as the film feed side drive gear 80. Although the spring body 80e is provided to hold the neutral position, this may be omitted.
Also in this case, when the rotation direction is switched, the engagement surface of each engagement portion is changed by the initial rotation, so that the initial rotation is absorbed. Therefore, the drive of the planetary gear is not transmitted to the drive gear with which the planetary gear has meshed. Further, instead of using the double gear of the initial rotation absorbing type, a one-way clutch may be used. In this case, the reverse rotation of the planetary gear in the initial rotation before the swing arm is switched,
It is not transmitted to the spool rotation shaft or the pushing cam side.

In the above embodiment, if the bar code reading fails, the tunnel gap for 120 is forcibly set and the specified number of shots is set to 32 for 220. A display may be performed to prompt manual setting. In addition, the film sensor 2
3b detects the joining tape 16c to detect the passage of the boundary between the film and the backing paper. In addition, the film sensor 23b directly detects the boundary between the backing paper 16a and the film 16b. May be.

In the above embodiment, the film feeding motor 3
The film was automatically wound using 5
Alternatively, the present invention may be applied to a camera for manually winding a film using a film winding lever.

In the above embodiment, the shift of the push cam 55 is transmitted to the pressure plate 42 by using the push pin 51. In addition, the push pin 51 is omitted and the push cam 55 is
The pressure plate 42 may be shifted in the photographing optical axis direction by directly contacting the pressure plate 42. In the above embodiment, four push pins 51 are used, but the present invention is not limited to this number. It is sufficient that the pressure plate 42 can be shifted in parallel to the film running surface, and any number of three or more pressure plates may be used.

In the above embodiment, the connecting shaft 56 for connecting the pushing cam 55 is urged by the cam spring plate 62 to urge the pushing pin 51 toward the pressure plate 42. 55 may be biased by a cam spring plate. Further, FIG.
As shown in FIG. 2, a spring plate 85 is provided between the push cam 55 and the push pin 51, and the push pin 51 is provided via the spring plate 85.
May be shifted in the direction of the pressure plate. In this case, the spring plate 85 is bent by the rotation of the push cam 55 to push the push pin 51.
Since the flange 51a is pressed so as to contact the edge surface 50a of the guide hole 50, efficient pushing can be performed. In addition,
The same components as those in the above embodiment are denoted by the same reference numerals. Further, in addition to shifting the pressure plate 42 by the pressing pin 51, a pair of movable pressure plates arranged in the vertical direction are provided so as to extend the pressure plate receiving rail over the leading ends of the two pressing pins 51 in the film feeding direction. The pressure plate 42 may be displaced via the receiving rail. Instead of using the pressing cam, the pressure plate position may be changed by using a link mechanism, a combination mechanism of a female screw member screwed to the screw rod, a lever mechanism, or the like.

In the above embodiment, the present invention is applied to a brownie size film having a 120 type film and a 220 type film. However, the present invention is not limited to a brownie size film, and may be used in addition to the film thickness. Also, the present invention can be applied to a photographic film having a plurality of types different from each other in the number of photographed images.

In the above embodiment, the film sensor and the bar code sensor are used. However, the film sensor may be omitted and the film feed control may be performed only by the bar code sensor. In this case, the leading end or the trailing end of the film may be detected using a barcode sensor.

[0055]

As described above, according to the present invention, the bar code reading means is arranged at a position facing the film passage,
The bar code is read by the bar code reading means, the film type is determined based on the read bar code, and the tunnel gap is changed accordingly, so that the tunnel gap is automatically set according to the film type. can do.

Further, by arranging the bar code reading means at a position facing the film passage between the aperture and the film winding chamber, the bar code can be read reliably. That is, the roll film has a curl, and the curl is greatest at the portion of the joining tape where the thickness is greatest. Therefore, when a barcode is recorded on the joining tape, the barcode may not be read particularly due to the influence of the curl. In addition, the entrance side of the film passage is not restricted by the pressure plate and the film rail in the entire area. Especially at the entrance, the influence of the winding habit is strong,
The flatness of the barcode recording portion cannot be ensured. This may cause a barcode reading error. On the other hand, in the film passage between the aperture and the film take-up chamber, the restriction between the pressure plate and the film rail extends over the entire area of the film, so that the flatness of the barcode recording portion is secured and the curl is removed. You. Therefore, by arranging the bar code reading means in this portion, the bar code can be read reliably.

Further, by disposing the film sensor at a position facing the film passage between the film storage chamber and the aperture, the leading end of the photographic film can be detected early by using the film sensor. Therefore, when the initial film feed is performed based on the leading edge detection signal, it is possible to secure a sufficient time from when the detection signal is obtained to when the film is initially fed, and it is possible to reliably and accurately feed the film. . Also, by detecting the trailing edge of the film with the film sensor, the trailing edge of the film can be detected early in the same way as when the final feed of the film is performed based on the trailing edge detection signal. Become.

Further, when a film sensor does not detect the joining tape even after a certain time has elapsed during the film feeding by the film feeding means, a means for displaying a film setting error is provided, so that the error of the film feeding can be detected. Can be performed reliably. In addition, by providing a bar code reading error display unit when a bar code is not read by the bar code reading unit even after a certain period of time, it is possible to reliably detect a bar code reading error and a film feed error. It can be carried out. Also,
A means for displaying a film feed error when the film feed amount does not reach the predetermined value even after a certain time has elapsed, or a film feed error when the film sensor has not detected the film after the film feed is completed. Is provided, the film feeding error can be detected more reliably.

When a barcode reading error occurs, the tunnel gap is set to the maximum by providing the film type setting means for setting the tunnel gap in the passage width of the film requiring the maximum width. Scratching of the film is prevented. In particular, by setting the passage width of the film requiring the maximum width to the width for the 120-type film, more reliable setting can be performed by matching the 120-type film with a high penetration rate. Moreover, 2
When photographing a 120-type film at a position of 20 types, there is a high possibility that abrasion or the like may occur on the film,
When photographing a 220 film at a 120 type position, a certain level of image quality is secured without occurrence of scratches.

When a bar code reading error occurs, a film type setting means for setting the number of storable films to the maximum number of storable films is provided.
It is possible to reliably shoot up to the specified number of shots. Especially,
Set the number of photos that can be taken on the film with the maximum
By setting the number of 20-type films, when the 220-type film is set, it is possible to reliably perform shooting up to the specified number of shots.

By providing a film type setting means for setting the film sensitivity to the film sensitivity of the most frequently used film when a bar code reading error occurs, the occurrence of the film sensitivity setting error can be reduced. . In particular, by setting the film sensitivity of the most frequently used film to ISO100, it is possible to perform photographing with less sensitivity setting error. Similarly, when a barcode reading error occurs, by setting the film type to the film type of the most frequently used film, it is possible to perform shooting with few setting errors.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a main part of a processing procedure of a camera according to the present invention.

FIG. 2 is an exploded perspective view showing a camera body side and a pressure plate in a state where a back cover of the camera is opened.

FIG. 3 is a perspective view of a main part of the camera of the present invention as viewed from the back cover side.

FIG. 4 is a block diagram illustrating a control system of the camera.

5A and 5B are longitudinal sectional views for explaining a tunnel gap. FIG. 5A shows a tunnel gap for a 220 roll film, and FIG. 5B shows a tunnel gap for a 120 roll film.

6A and 6B are cross-sectional views for explaining a tunnel gap, wherein FIG. 6A shows a tunnel gap for a 220 roll film, and FIG. 6B shows a tunnel gap for a 120 roll film.

FIG. 7 is a flowchart illustrating a pressure plate position switching process.

FIG. 8 is a flowchart showing a film final feeding process.

FIG. 9 is a perspective view showing another embodiment in which a pressure plate position is switched using a film feeding motor.

FIG. 10 is a perspective view showing a planetary gear clutch.

FIG. 11 is a perspective view showing a planetary gear clutch using a double gear.

FIG. 12 is a cross-sectional view showing another embodiment in which the position of the push cam is changed.

[Explanation of symbols]

 Reference Signs List 10 back cover 11 camera body 12 aperture 13 film passage 23a film sensor 23b barcode sensor 35 film feed motor 36 pressure plate position switching motor 40, 41 film rail 42 pressure plate 43, 44 pressure plate receiving rail 48 pressure plate spring 50 guide hole 51 pushing Pin 52 Pressure plate position switching unit 55 Push cam 59 Planetary gear clutch 60 Shaft hole 62 Cam spring plate 63 Arm shift unit 80, 81 Drive gear 85 Spring plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hisashi Hamada 3-13-45 Izumi, Asaka-shi, Saitama Prefecture Inside Fujisha Shin Film Co., Ltd. (72) Inventor Tokuji Sato 3-13-45 Izumi, Asaka-shi, Saitama Fujisha Shin Film Co., Ltd.

Claims (14)

[Claims] 1. A photographic film in which the front and rear ends of a film are bonded to a backing paper with a bonding tape, and a photographic film in which a bar code indicating a film type is recorded on the backing paper or the bonding tape is used, between the film storage chamber and the film winding chamber. In a camera in which a tunnel gap formed between a pressure plate and a film rail is made freely changeable in a photographing optical axis direction in a film passage including an aperture, a bar code reading means provided at a position facing the film passage. A film discriminating means for discriminating a film type based on the bar code read by the bar code reading means, and a tunnel gap changing means for changing a tunnel gap according to the film type from the film discriminating means. And the camera. 2. A photographic film in which the front and rear ends of a film are bonded to a backing paper with a bonding tape, and a photographic film in which a barcode indicating a film type is recorded on the backing paper or the bonding tape is provided between the film storage chamber and the film winding chamber. In a camera in which a tunnel gap formed between a pressure plate and a film rail is made freely changeable in a photographing optical axis direction in a film passage including an aperture, a position facing a film passage between the film storage chamber and the aperture. A bar code reading means provided at a position facing a film passage between the aperture and the film take-up chamber; and a film-portion-joining portion on the front end side of the film is detected by the film sensor. Film feed means for feeding the film based on the bar code; and the bar code reading means reads the bar code. Camera and the film discriminating means for discriminating the film type on the basis of the read bar code, characterized by comprising a tunnel gap changing means for changing the tunnel gap in accordance with the film type from the film discriminating means. 3. The film feeding means according to claim 1, wherein:
Feed the film to set the frame to the aperture,
Means for displaying a film setting error when the film sensor does not detect a joint portion on the leading end side of the film even after a lapse of a predetermined time during film feeding by the film feeding means. 2. The camera according to 2. 4. The camera according to claim 3, further comprising means for displaying a barcode reading error when the barcode is not read by the barcode reading means even after a predetermined time has elapsed. 5. The camera according to claim 4, further comprising means for displaying a film feed error when the film feed amount does not reach a predetermined value even after a predetermined time has elapsed. 6. The camera according to claim 5, further comprising means for displaying a film feeding error when the film sensor has not detected the film after the film feeding is completed. 7. A film type setting means for setting the tunnel gap to a passage width of a film requiring a maximum width when a bar code reading error occurs. The camera according to any one of the above. 8. The camera according to claim 7, wherein the passing width of the film requiring the maximum width is a width for a 120 type film. 9. A film type setting means for setting, when a bar code reading error occurs, the number of shootable films of a film having the maximum specified number of shoots to a maximum. Cameras listed. 10. The camera according to claim 9, wherein the number of shootable films of the film having the maximum specified number of shoots is the number of 220 type films. 11. A film type setting means for setting a film sensitivity of a most frequently used film when a bar code reading error occurs. Camera according to one. 12. The camera according to claim 11, wherein the film sensitivity of the most frequently used film is ISO100. 13. A film type setting means for setting, when a bar code reading error occurs, the film type of the film most frequently used to the type of film. Camera according to one. 14. The camera according to claim 13, wherein the film type of the most frequently used film is a negative color film.