JPH0862712A - Camera - Google Patents

Abstract

PURPOSE: To reduce cost, to improve reliability and to realize the preparation for photographing in a high speed by eliminating the need of a reference signal generating device for reading a bar code. CONSTITUTION: In this camera; after the leading edge of film F wound in a spool in a cartridge C is fed by driving rotating the spool, allowed to pass a photographic picture frame part, and wound in a take-up reel 62, the film F is wound by driving and rotating the reel 62, and then picture exposure and the recording of magnetic information are executed. It is constituted of a bar code disk formed integrally with the spool, a sensor detecting film information on the bar code disk, and a display means displaying the film information detected by the sensor. After loading the cartridge C in the camera and taking up the leading edge of the film to the reel 62, the bar code is started to be read, and the film F is rewound to a first frame after finishing reading the bar code in the camera.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a bar code information detecting means and drives a motor in a normal direction to wind a film on a reel, and drives the motor in a reverse direction to wind a film on a spool in a cartridge. The present invention relates to a camera having a returning film feeding mechanism.

[0002]

2. Description of the Related Art Japanese Patent Application No. 5-143781 filed by the present applicant reads bar code information by rotating a spool in a cartridge in a film rewinding direction after film loading and before film feeding. . Furthermore, Japanese Patent Application No. 5-328191 by the present applicant enables a bar code to be read even if there is rotation fluctuation by generating a reference signal during film feeding and reading the bar code based on this. To do.

Further, Japanese Patent Application No. 6-4835 filed by the present applicant discloses a motor for forward and reverse rotation, a reel drive gear, a spool drive gear, and a planetary gear that drives the reel drive gear at the time of winding and disengages at the time of rewinding. , A planetary gear that drives a spool drive gear at the time of winding and disengages at the time of rewinding, and a planetary gear that drives a spool drive gear at the time of rewinding and disengages at the time of winding. In addition, Japanese Patent Application No. 6-59285 by the applicant
In JP-A No. 2004-242242, by using an idle joint for the first planetary gear, it is possible to prevent the motor from stopping due to the tension of the film when the film winding is switched to the winding process.

[0004]

[Patent Document 1] Japanese Patent Application No. 5-143781 discloses that a spool in a cartridge is rotated in a film rewinding direction to read bar code information after film loading and before film feeding. It takes time to complete the preparation.

In Japanese Patent Application No. 5-328191, if the bar code is read from the time the film is fed to the time the autoloading is completed, the film feeding speed fluctuates greatly. The code is being read. Therefore, a reference signal generator for reading the bar code is required, which is not preferable in terms of manufacturing cost and reliability. Also, after the film is wound on the reel, it is suitable for barcode reading because the film feeding is stable and there is no risk of auto loading error after that, but it is necessary to read the barcode by the time the auto loading is completed. There is a problem that does not end.

When the film feeding mechanism described in Japanese Patent Application No. 6-4835 is used to perform the film feeding control described in claim 1, the present inventors Found the following problems. That is, when it is attempted to switch from the film rewinding state to the winding-up state, the planetary gear that drives the reel drive gear at the time of winding is changed to the reel drive gear before the planetary gear that was driving the spool gear at the time of rewinding is separated from the spool gear. When meshed, the reel drive gear drives the reel, the reel winds the film, and the film rotates the spool or spool gear. As a result, the planetary gear that was driving the spool gear during rewinding cannot be disengaged from the spool gear, and the planetary gear receives force from two drive sources, the spool gear and the sun gear, and finally the motor. Will stop. Therefore, the barcode reading is completed,
After rewinding the film to the first frame and shooting, it is not possible to wind the film to the next frame.

Therefore, in Japanese Patent Application No. 6-59285, the idle joint is used for the first planetary gear to prevent the motor from stopping, but the idle joint cannot be used for the first planetary gear. The degree of freedom in design is limited.

As described above, the present invention eliminates the need for a reference signal generator for reading a bar code, achieves cost reduction and reliability improvement, and realizes quick preparation for photography.

Further, in a camera for reproducing magnetic information recorded on a film, the above problem can be effectively solved when a film which has been rewound in the middle without being photographed for all frames is reloaded. That is, at this time, the film is wound while obtaining the information that each frame has been photographed, but if the magnetic head is on the reel side of the photographing screen, when an unexposed frame is detected, it will be extra than the predetermined frame. It has been rolled up. Therefore, it is necessary to rewind the film after rewinding it by a predetermined amount.

[0010]

A camera according to the present invention solves the above problems and achieves the following objects.

(1) A reference signal generator for reading a bar code is not required, and cost reduction and reliability improvement are achieved.
In addition, it realizes quick shooting preparation.

(2) A camera which makes it easy to find the beginning of the film when the cartridge, in which the film having the unexposed frame portion and which has been photographed halfway (partially exposed film) is rewound on the spool and accommodated, is reloaded into the camera. I will provide a.

The camera of the present invention which achieves the above object comprises a rotatable spool provided for winding and storing a film, and a bar code disc formed integrally with the spool and recording film information. , Holding the film wound on the spool in a light-tight manner, and loading the film in the cartridge with a cartridge provided with a window for detecting film information recorded on the barcode disc. In a camera provided with a film feeding means for rotating and driving the spool in order to send out, wind around a take-up reel, or rewind the film into the cartridge, a sensor means for detecting film information on the bar code disc, A film that detects that the leading edge of the film has been taken up by the take-up reel and outputs a detection signal. In response to the output of the detection signal of the feed detection means and the film feed detection means, the detection of the film information by the sensor means is started, and the film information is detected in response to the end of the film information detection of the sensor means. And a control means for driving the film feeding means in order to rewind the film to the first frame.

Further, the camera of the present invention includes a motor capable of rewinding the film on a take-up reel by driving in the forward direction and rewinding the film in a spool in the cartridge by driving in the reverse direction, and a rewinding motor. A reel gear that rotates integrally with the take-up reel; a spool gear that rotates integrally with the spool; a first planetary gear that drives the reel gear during winding and disengages during rewinding;
The second planetary gear that drives the spool gear at the time of winding and disengages at the time of rewinding, the third planetary gear that drives the spool gear at the time of rewinding and disengages at the time of winding, and the film feeding speed by the winding reel are A speed reduction gear group set faster than the film feeding speed by the spool, and when the motor is normally driven in a rewinding state, the first planetary gear is separated from the spool gear before the first planetary gear is separated from the spool gear. A torque limiter is provided on the first planetary gear so that the driving force of the motor is not immediately transmitted to the reel gear even if the planetary gear meshes with the reel gear.

The camera of the present invention further comprises a motor capable of rewinding the film on a take-up reel when driven in the forward direction and rewinding the film on a spool in the cartridge when driven in the reverse direction, and a rewinding motor. A reel gear that rotates integrally with the take-up reel; a spool gear that rotates integrally with the spool; a first planetary gear that drives the reel gear during winding and disengages during rewinding;
The second planetary gear that drives the spool gear at the time of winding and disengages at the time of rewinding, the third planetary gear that drives the spool gear at the time of rewinding and disengages at the time of winding, and the film feeding speed by the winding reel are A speed reducing gear group set faster than the film feeding speed by the spool, and a torque limiter for pressing the reel gear rotatably pressed by an elastic member is provided on the shaft end surface of the take-up reel. The drive torque from the motor is not immediately transmitted to the take-up reel via the first planetary gear and the reel gear by the frictional force of the torque limiter when switching from rewinding to winding. Is.

Furthermore, in the camera of the present invention, the film is wound up by the take-up reel by driving in the forward direction,
A forward / reverse rotation motor that rewinds the film on the spool in the cartridge by driving in the reverse direction, a reel gear that rotates integrally with the take-up reel, a spool gear that rotates integrally with the spool, and A first planetary gear that drives the reel gear and disengages during rewinding, a second planetary gear that drives the spool gear during winding up, and a second planetary gear that disengages during rewinding, drive the spool gear during rewinding, and during winding up A third planetary gear to be disengaged and a reduction gear group in which the film feeding speed of the winding reel is set to be faster than the film feeding speed of the spool, and an elastic member urges the shaft end surface of the winding reel. A torque limiter that rotatably presses the reel gear is provided, and when switching from rewinding to winding of the film, It is characterized in that the drive torque from the serial motor is not to transmit to the take-up reel immediately through the first planetary gear and the reel gear by the friction force of the torque limiter.

[0017]

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

First, the film and cartridge used in the present invention will be described with reference to FIGS.

FIG. 1 is a front view of the film pulled out from the cartridge. In the figure, at one end of the film F, two perforations Fb ₁ and Fb ₂ are provided for each frame of the photographic screen Fa, but the perforations are provided at the tongue end (tip) Fd. Not not. At the other end of the film F, two magnetic tracks Fe coated with a magnetic layer are provided for each frame of the photographing screen,
Color temperature of light source, subject brightness, exposure time, aperture value, presence or absence of backlight, presence or absence of flash emission, presence or absence of continuous shooting, camera type, owner ID, trimming information, shooting date, photographer's memo, photographed Photographing information such as information is recorded by a recording head provided in the camera, and is used as information during print processing after film development. Further, a magnetic track Ff is also provided on the other end of the tongue end Fd of the film F.
Film information such as film type, emulsion lot, sensitivity, number of frames taken, latitude, manufacturing date, etc. is recorded and played back with the playback head provided on the camera, and each function of the camera is changed according to the film used. Set automatically. However, the magnetic track Ff may not only be reproduced but may also record shooting information, so that there is a margin for recording on the magnetic track Ff.

When the shooting area on the film is used to the maximum, the screen size is set to a high-definition size which is slightly longer than the conventional screen size with an aspect ratio of 2: 3. By trimming the edges, a normal size with an aspect ratio of 2: 3 is formed, and by trimming the upper and lower edges, a panoramic size with a horizontally long screen is formed rather than the high definition size.

It should be noted that the film F is stored in the cartridge C including the tongue end portion when not in use and after use.
Further, in order to reliably send out the tongue end portion Fd of the film F from the cartridge C, the film base is provided with TA.
PEN (polyethylene naphthalate), which can be formed thinner than C, PET, and has high tensile strength, is used.

Further, as will be described later, the cartridge C is provided with a usage status display window for displaying the usage status of the film.

FIG. 2 is a plan view of the cartridge C.
A bar code disk 1 is built in at the end of the space in which the film F in the cartridge C is stored, and is integrally rotatably assembled together with the spool 2. FIG. 3 is a diagram of a bar code disc. The bar code on the bar code disk 1 has film information corresponding to the conventional DX code such as film sensitivity and the number of frames to be photographed.
It is divided into 24 areas in 15 degree increments, and a reference position that indicates the start of information when black appears in four consecutive black and white patterns. If the same color is two consecutive blocks, "1", only one block. If so, the information is written according to a rule such as "0", the film sensitivity is 5 bits, the number of frames taken is 3 bits, and the latitude is 2 bits.
A total of 10 bits of information is shown. If the standards of film, camera, etc. are unified, one block of barcode will
It may have an area other than 24 at an angle other than 15 degrees, and the law of information recording may be a law other than the above.

The rotating bar code disk 1 is a bar code window 3
When reading the film information, a photoelectric element such as a photo reflector provided on the main body side facing the window 3 for the bar code when reading the film information is used to rotate the spool 2 photoelectrically. To read. Further, when the use state of the film is displayed through the use state display windows 4 and 5, and when the cam having the long radius and the cam having the short radius are visible as shown in FIG. 2, the film is loaded into the camera and then all frames are photographed. 4A shows a partial use when it is rewound in the middle before, and when both of the long radius cams are visible as shown in FIG. 4A, the film is in an unused state.
When both cams with a short radius are visible as in (B), it means that the film has been used, that is, has been photographed.

The spool 2 has convex portions 2a and 2b and a concave portion 2
It has c and 2d, and the spool shaft on the camera side, which will be described separately, fits therein.

Since unused or used film F may leak light from the film draw-out port of the cartridge C, a rotary shutter (not shown) is provided at the film draw-out port, and the cartridge C is attached to the camera. When the cartridge C is loaded into the cartridge, the shutter shaft 6 is rotated in conjunction with the closing operation of the cartridge lid to open the shutter, and when the cartridge C is taken out from the camera, the cartridge lid is opened in association with the opening operation of the cartridge lid. Before, the shutter shaft 6 is rotated to close the shutter.

Next, a camera in which the cartridge C containing the film F is loaded will be described. 5 is a front view of the camera, FIG. 6 is a plan view of the camera, FIG. 7 is a rear view of the camera, and FIG. 8 is a bottom view of the camera.

In FIG. 5, a lens barrel 11 for a taking lens is provided in the center, and from the upper right, a strobe light emitting section 12 that automatically emits strobe light when the brightness becomes low, a metering window 13 that measures the brightness of an object, an auto mode. AF projection window 14 that emits infrared light for focusing, viewfinder window for checking the subject
15. AF light receiving window that receives infrared light reflected from the subject
16 、 Self L to inform the operating state of the self-timer by light
The ED window 17 is connected in series. In addition, in the lower right corner, the high-definition size, which is the standard size for this camera, is used to form a panorama size print with the upper and lower edge images trimmed, and a normal size print with a 2: 3 ratio by trimming the left and right edge images. A format switching button 18 for switching print format information for magnetically or optically recording a signal for performing the recording on a film is provided.

In FIG. 6, a release button 19 for performing shutter release is provided at the lower left. A date operation unit for magnetically recording a date signal for each shooting frame is provided in the upper right, and a date button for switching the date mode such as date, date and time, no imprint, etc., and correction of each date character A date set button 21 is provided, and an LCD 22 for displaying date characters, the number of photographed frames, various modes, etc. is provided at the lower right.

In FIG. 7, from the upper right side, when pressed, S ₀ of the power supply circuit inside the camera is turned on and the lens barrel 11 for the photographing lens is extended, and when further pressed, the main switch button 23 and the viewfinder are retracted. Eyepiece window 25, rewind button 26 to rewind the film halfway, self button 27 to set the self-timer mode, automatic flash firing mode, pre-flash mode to reduce red-eye reduction, forced flash firing mode, and flash firing stop A mode selection button 28 that can be switched to a mode or the like is provided. Reference numeral 29 is a convex portion generated by providing the magnetic head.

In FIG. 8, a cartridge lid 30 for loading the cartridge C and a cartridge lid button 31 for opening the cartridge lid 30 are provided.

FIG. 9 is a diagram showing that the cartridge lid 30 of the camera described above is opened and the cartridge C is dropped into the cartridge chamber 32. The cartridge C may have a shape as shown.

FIG. 10 is a view of the cartridge chamber 32 viewed from the cartridge lid 30 side. A spool shaft 33 that engages with the spool 2 of the cartridge C is erected at the center. A photo reflector 34, which is a barcode reading means for reading the barcode of the barcode disc 1, is provided at the upper right,
The barcode disc 1 is rotated to read the film sensitivity, the number of frames to be photographed and the latitude as described above, and then the E ^{2 of the} camera is read.
Store in PROM. A cartridge detection pin that normally protrudes into the cartridge chamber 32 at the lower left by a spring or the like, and retracts from the cartridge chamber 32 by pressing from the tip.
35 are provided.

FIG. 11 is a diagram showing the operation of the cartridge C and the cartridge detection pin 35. Cartridge detection pin
The numeral 35 is provided at a position corresponding to the usage status display window 5 in FIG. Therefore, unused and partially used cartridges C can be loaded, and only used cartridges C cannot be loaded. The cartridge detection pin 35 is embedded in the main body 10, and its tip projects into the cartridge chamber 32 by a spring 36. Bar code disk 1 on the usage status display window 4 or 5
11 (A) and 11 (B), the cartridge detection pin 35 can be slid at the edge 1a of the bar code disk 1, but the start mark of the bar code disk 1 is positioned. When you do,
As described above, the cartridge detection pin 35 abuts the step portion 1b of the cartridge C and cannot be loaded.

FIG. 12 is a view showing the field of view of the founder. The visual field frame is provided with a standard-sized high-definition visual field frame 51, a panoramic visual field frame 52, and a normal visual field frame 53. When the panoramic size is selected by pressing the format switching button 18 in FIG. The display 54 lights up in green, and when the normal size is selected, the normal size display 55 lights up in green. Also, when you press the release button 19 to measure the distance properly, the AF mark
When 56 lights in green and the flash is charging or the brightness is low,
The strobe mark 57 lights up in red.

Next, a feeding mechanism will be described in which the film F is pulled out from the cartridge C and wound up one frame at a time and then rewound into the whole frame cartridge 1. FIG. 13 is a plan view of the film feeding mechanism, and FIG. 14 is a perspective view thereof.

In FIG. 13A, a film feeding motor 61, which is a drive source for film feeding, is built in a reel 62 around which the film F fed from the cartridge C is wound, and the film feeding motor 61 is fed above the reel 62. A motor pinion 63 directly connected to the rotary shaft of the feed motor 61 is provided. The driving force from the motor pinion 63 is transmitted to the second sun gear 70 via the intermediate two-stage gears 64 and 65, the first sun gear 66, the intermediate two-stage gears 67 and 68, and the fourth sun gear 69. When winding the film F from the cartridge C onto the reel 62, the motor pinion 63 rotates counterclockwise and the second sun gear 70 rotates clockwise, so that the second sun gear 70 meshes with the second sun gear 70. The second planetary lever 71 carrying the second planetary gear 72 rotates clockwise, meshes the second planetary gear 72 with the spool gear 73, and rotates the spool gear 73 clockwise. When the film F is rewound from the reel 62 into the cartridge C, the motor pinion 63 rotates clockwise and the second sun gear 70 rotates counterclockwise. The second planetary lever 71 carrying the meshing third planetary gear 74 rotates counterclockwise, and the third planetary gear 74 and the spool gear 73 are rotated.
, And the spool 2 of the cartridge C is rotated counterclockwise together with the spool gear 73.

On the other hand, the first planetary lever 76 carrying the first planetary gear 75 meshing with the first sun gear 66 rotates clockwise during film winding, and the reel gear 77 is rotated by the first planetary gear 75. The reel gear 77 is driven to rotate the reel 62 clockwise along with the reel gear 77. Further, during rewinding, the first planetary lever 76 rotates counterclockwise, so the driving force of the first planetary gear 75 is not transmitted to the reel gear 77, that is, the driving force of the film motor 61 is applied to the reel 62. Is not transmitted.

In the film feeding mechanism having such a structure, when the motor pinion 63 of the film feeding motor 61 is rotated counterclockwise, the spool 2 in the cartridge C is rotated clockwise, and the tongue end of the film F is rotated. The portion Fd is sent out between the rail surface of the main body (not shown) and the pressure plate 81. Further, although the film F is fed by the rotation of the spool 2, when the tongue end portion Fd of the film F passes between the magnetic head 85 and the camera body, it receives a feeding load, and the spool 2 and the film F are fed. There is a risk that the film F will be deformed in the vicinity of the connection portion of, and stable film feeding cannot be performed.
Therefore, after the tongue end Fd of the film F is fed out, the film is fed to the reel 62 by the drive roller 78, and the driving force is used to feed the film. Therefore, even when the film F passes between the magnetic head 85 and the camera body, an excessive load is not applied to the vicinity of the connection portion between the spool 2 and the film F,
Stable film feeding is performed.

The pressure plate 81 is pressed against the rail surface by a pressure plate spring 82. A pressure plate roller 83 integrally formed coaxially and a fourth planetary gear 79 face each other substantially at the center of the pressure plate 81 in the film feeding direction, and the fourth planetary gear 79 is the fourth planetary lever 80.
And is meshed with the fourth sun gear 69. The center of the fourth sun gear 69 is provided in the cartridge C direction with respect to the center of the fourth planetary gear 79.

When the film motor 61 rotates counterclockwise, the fourth sun gear 69 also rotates counterclockwise.
The fourth planetary lever 80 also rotates counterclockwise. Therefore, the drive roller 78 feeds the film F toward the reel 62 while sandwiching the film F with the pressure plate 81. The film feeding speed by the drive roller 78 is set higher than the feeding speed by the spool 2, and the spool gear 73 is rotated by the film F faster than the peripheral speed of the second planetary gear 72. Therefore, the second planetary gear 72 rotates counterclockwise and disengages from the spool gear 73, so that the feeding force of the film F is transmitted only from the drive roller 78. Also, the film F
Since the film is fed by the driving roller 78 even if the pressure plate 81 or the magnetic head 85 feeds the film, the film F can be fed without being deformed in the cartridge C.

As a matter of course, the driving roller 78 is provided at one end outside the photographing screen. Drive roller
A pressure plate roller 83 is provided in the pressure plate 81 so as to face 78.

FIG. 13B shows a drive roller during film feeding.
78 is an enlarged view of 78 and the pressure plate roller 83. Clearance (cl) is provided by 0.1 to 0.2 mm and retracted so that the pressure plate roller 83 does not protrude from the surface of the pressure plate 81 due to manufacturing error.

FIG. 13C is an enlarged view of the drive roller 78 and the pressure plate roller 83 when the film is not loaded. The drive roller 78 contacts the pressure plate roller 83 to prevent abrasion.

The tongue end Fd of the film F passing through the pressure plate 81
Passes through the magnetic head 85 and is then wound around the reel 62 by a well-known back cover roller and body roller (not shown). In the magnetic head 85, reproduction of film information,
Alternatively, at least one of recording of shooting information of the camera is performed.

When the tongue end Fd of the film F is wound around the reel 62, the feeding force of the film F is transmitted from the reel 62.
The film feeding speed by the reel 62 is set higher than the film feeding speed by the drive roller 78, and the fourth planetary gear 79 rotates faster than the peripheral speed of the fourth sun gear 69 by the film F. Therefore, the fourth planetary gear 79 rotates clockwise, the fourth planetary lever 80 swings clockwise, and the drive roller
The 78 leaves the film F.

In this way, when the tongue end portion Fd having a predetermined length is fed and the perforation Fb ₂ of the first frame is fed to the position of the photoreflector 91 for perforation detection, the feeding is stopped and 1 It is possible to shoot the pieces.

In this way, one frame is photographed one by one, and the number of photographed frames of the loaded film is determined by the bar code disc 1
Since the camera reads it beforehand and stores it in the E ² PROM, the film feeding motor 61 is driven in the reverse direction when the photographing up to the predetermined final frame is completed. Then, the third planetary gear 74 meshes with the spool gear 73, and the spool 2 rewinds the film F into the cartridge C. Here, since the first sun gear 66 also rotates in the reverse direction, the meshing of the first planetary gear 75 and the reel gear 77 is also released, and the reel 62 does not receive the driving force of the feeding motor 61, so that it can be rewound. Further, since the fourth sun gear 69 also rotates in the reverse direction, the fourth planetary gear 79 rotates in the direction away from the film F, the pinching of the film F by the drive roller 78 and the pressure plate roller 83 is released, and the drive roller 78 rewinds. Does not become a load of.

In the feeding mechanism described above, stoppers are naturally provided near the first planetary lever 76, the second planetary lever 71 and the fourth planetary lever 80 so as not to rotate more than a predetermined angle. It is necessary, but omitted in the figure.

Further, in FIG. 14, when the bar code disk 1 is rotated by the rotation of the spool gear 73, the bar code information is read by the photo reflector 34 for bar code reading as described above.
Read by.

Further, two LEDs 93 are provided in the lower center, and optical information F _g is optically recorded on the film F. In this case, 2-bit information can be recorded.

In the camera of this embodiment, when it is desired to use films having different sensitivities, the loaded film is rewound in the middle without photographing all frames and reloaded at a later date,
Since the magnetic information is recorded on the magnetic track Fe if the photographing is completed, it is possible to automatically wind up to the unexposed frame. However, as shown in FIG. 14, since the magnetic head 85 is located on the reel 62 side of the photographing screen Fa, it is overwound when it is detected that it is an unexposed frame, and therefore a predetermined amount is rewound. necessary.

However, as described above, the reel 62 and the spool 2
When the feeding mechanism is switched from rewinding to winding while the film is stretched between the two, the meshing of the first planetary gear 75 and the reel gear 77 is faster than the disengagement of the third planetary gear 74 and the spool gear 73. Since the film feeding speed by the reel 62 is faster than the film feeding speed by the spool 2, the reel 62 is rotated by the drive of the reel gear 77, the film F is wound up, and the film F is passed through the spool 2 and the spool shaft 33. The spool gear 73 will be rotated. as a result,
The third planetary gear 74 and the spool gear 73 cannot be disengaged from each other and the meshing is continued, but the spool gear by the film F is used.
Since the rotation speed of 73 and the rotation speed of the spool gear 73 by the third planetary gear 74 are different, the film feeding motor 61 eventually stops.

For this purpose, a torque limiter (slip clutch, slip joint, friction joint, etc.) as shown in FIG. 15 is used. FIG. 15 (A) is a sectional view of a gear train in which the torque limiter is provided near the first planetary gear. 15B is an enlarged sectional view of the first planetary gear 75, and FIG. 15C is a side sectional view showing a ball type torque limiter of the first planetary gear 75.
(D) is a plan view of the torque limiter. 1st planetary gear
Reference numeral 75 denotes a drive gear 751 that meshes with the first sun gear 66, a support shaft 752 that rotatably supports the drive gear 751, and a support shaft 752.
A play gear 753 that is rotatably supported by the drive gear 751 and is rotatable coaxially with the drive gear 751, a recess of the play gear 753, and the support shaft 75.
It is composed of a coil spring (elastic member) 754 interposed between the second flange portion and a small ball 755 arranged on the contact surface between the drive gear 751 and the idle gear 753. On the side of the idler gear 753 facing the drive gear 751 (upper surface side), saw tooth portions 753A having a plurality of obtuse angled slopes are radially formed in the radial direction. On the other hand, a small ball 755 is rotatably embedded and held in at least a part of the lower surface side of the drive gear, and a protruding portion of the small ball 755 is in pressure contact with the saw tooth portion 753A. The drive gear 751 and the idle gear 753 of the first planetary gear 75 are
The coil springs 754 are pressed against each other via the saw-tooth portion 753A and the small balls 755 by a predetermined pressing force. Therefore, the drive torque from the sun gear 66 and the drive gear 751 is transmitted to the reel gear 77 via the idle gear 753 by the predetermined torque of the torque limiter.

The idle gear 753 meshes with the reel gear 77. The drive gear 751 and the idle gear 753 of the first planetary gear 75 are separated from the sun gear 66 and the drive gear 751 by the pressing force of the coil spring 754 of the torque limiter and the inclined surface component force of the sawtooth portion 753A of the idle gear 753. The drive torque is transmitted to the reel gear 77 via the idle gear 753. When an excessive resistance force is applied to the reel gear 77, the idle gear 753 idles by the torque limiter, and the drive torque from the drive gear 751 is not directly transmitted to the reel gear 77. As a result, at the time of winding, even if the first sun gear 66 is driven to rotate and the first planetary gear 75, that is, the drive gear 751 is rotated, if the reel gear 77 has a load of a predetermined torque or more, the torque limiter The small ball 755 slides on the inclined surface of the sawtooth portion 753A, the idle gear 753 idles, and the driving force is not transmitted to the reel gear 77. When the load torque of the reel gear 77 becomes equal to or less than a predetermined value, the torque limiter enters the connected state and the idle gear 753 rotates. Therefore, at the initial stage when the rewinding is switched to the winding and the meshing of the third planetary gear 74 and the spool gear 73 is not disengaged, the driving force is not transmitted to the reel gear 77, that is, the reel 62, and the driving force is applied to the reel 62. Is transmitted, the 3rd planetary gear
74 and the spool gear 73 are separated. Note that, conversely to FIG. 15, the drive gear 751 of the first planetary gear 75 may be provided with a saw tooth portion and the idle gear 753 may be provided with a small ball. FIG. 15 (E) is a side sectional view showing another embodiment of the torque limiter.
And saw teeth 751A and 753 of the same shape on the opposing surfaces of the idle gear 753
A is formed and meshed.

FIG. 16 shows an embodiment in which a torque limiter is provided at the connecting portion between the spool shaft 33 and the spool gear 73.
16A is a plan view of the torque limiter, FIG. 16B is a sectional view of a spool portion provided with the torque limiter, FIG. 16C is an enlarged sectional view of the torque limiter, and FIG. It is a sectional side view of a limiter.

The flange portion 33A of the spool shaft 33 and the coil spring 731 are inserted into the concave portion of the spool gear 73, and are closed by the lid member 732. A saw tooth portion 2B is formed on the flange portion 33A of the spool shaft 33,
It comes into contact with a small ball 733 embedded in the spool gear 73 and is pressed by the compressive force of the coil spring 731 at the upper side to act as a torque limiter. When either the second planetary gear 72 or the third planetary gear 74 meshes with the spool gear 73 to rotate in the normal or reverse direction, if an excessive load is applied to the spool shaft 33, the action of the torque limiter causes the spool shaft 73 to operate. The drive shaft 33 does not rotate and the driving force is not directly transmitted to the spool shaft 33.

FIG. 17 is a sectional view showing an embodiment in which a torque limiter is provided at the connecting portion between the reel 62 and the reel gear 77. The saw tooth portion 77A formed on the lower surface side of the reel gear 77 and the reel 62
The small ball 773 embedded in the stepped portion near the shaft end of the shaft is pressed by the compression coil spring 771 and the lid member 772 to function as a torque limiter, and the torque larger than a predetermined torque is transmitted to the reel 62. To prevent.

Next, the circuit configuration of the camera of this embodiment is shown in the block diagram of FIG.

In FIG. 18, a CPU 50 for controlling each circuit
0 has a ROM 501 and a RAM 502. 511 is a power supply detection circuit that detects that the power supply voltage is equal to or higher than a predetermined voltage,
Reference numeral 512 is a bar code reading circuit that reads bar code information by the bar code reading photo reflector 34 and outputs the information. 513 is a perforation detection circuit that detects the perforation of the film by the perforation detection photo reflector 91 and outputs the information. ,
514 is a display circuit for displaying information to be displayed on the camera in the LCD 22 and the viewfinder, and 515 is a strobe light emitting unit 1.
2.Strobe circuit for emitting flash from 2; 516, photometric circuit for measuring subject brightness; 517; distance measuring circuit for measuring subject distance; 518; lens drive motor, shutter drive motor, film feeding motor, etc. A motor control circuit for controlling, 519 is a shutter operation detecting circuit for detecting the operation state of the shutter, and 560 is an E ^{2 for} storing each operation information.
PROM, 561 is a magnetic reproducing circuit for reproducing magnetic information by the magnetic head 85, 562 is a magnetic recording circuit for recording magnetic information by the magnetic head 85, and 563 is an optical imprinting unit for imprinting 2-bit information on the film by the LED 93. is there.

On the other hand, S ₀ is a main switch operated by the main switch button 23, S ₁ is a release switch operated by the first stage of the release button 19, and S ₂ is a _second switch of the release button 19.
Release switch that operates in steps, S ₃ is mode selection button 28
The mode switch that is operated by, S _B is the cartridge lid 3
Cartridge lid switch that operates by opening and closing 0, S _C is a cartridge loading switch that detects loading of the cartridge C by the cartridge detection pin 35, and S _A is a screen size that switches between high-definition size, panoramic size and normal size by the format switch button 18. switch,
S _S is a self switch operated by the self button 27, S _R is a rewind switch operated by the rewind button 26, and S ₄ is a date for switching the date mode such as date, time and minute, no imprint by the mode button 20. A mode switch, S _5, is a date set switch for correcting each date character by the date set button 21.

Next, Table 1 shows the operating states of the switches shown in the flow chart.

[0063]

[Table 1]

Table 2 shows the flag names, symbols and operating states.

[0065]

[Table 2]

Table 3 shows the names and symbols of the RAMs.

[0067]

[Table 3]

FIG. 19 is a diagram for explaining the process of setting the first unexposed frame in the photographing screen frame of the camera during film feeding.

FIG. 19 (A) shows a layout of the vicinity of the aperture (photographing screen frame) AP of the camera, 91 is a photo reflector (light detecting element), and 85 is a magnetic head.

In FIG. 19B, the film F is fed out by driving and rotating the spool 2 in the cartridge C,
In a camera using a film that displays film information by a bar code, the first perforation Fb ₁ of the first frame f 1 of the film F is detected by the photo reflector 91. At this time, the magnetic head 85 reaches the magnetic track Ff at the film tongue end Fd.

FIG. 19C shows a state in which the film F is further fed by the rotation of the spool 2 and the tongue end portion Fd of the film is wound around the peripheral surface of the reel 62 by 1.5 turns or more and stopped. That is, P ₁ · a + 1.5πD <r · d + d, where P ₁ · a indicates the distance from the photodetector 91 shown in FIG. 14 to the center of the reel, and D indicates the diameter of the reel. Also,
(R · d + d) is as shown in FIG.

In this way, the tongue end portion Fd of the film is reliably wound around the reel 62, and the first frame f1 is detected at the position detection timing 91 by which the _second perforation Fb2 of the first frame f1 can be detected by light. Is opposed to the aperture AP of the camera, and the pattern reading of the barcode disc 1 by the photo reflector 34 is started.

FIG. 19D shows a state in which the photodetection element 91 has detected the _third perforation Fb ₃ . At this timing, recording or reproduction is performed on the magnetic track Fe of the first frame f1. When the cartridge C containing the film F rewound during shooting is reloaded in the camera, it is determined whether or not the first frame f1 of the film F has been exposed for shooting depending on whether or not there is a record on the magnetic track Fe. Can be determined.

FIG. 20 is a diagram for explaining the process of loading the cartridge C containing the film taken halfway into the camera and setting it as the first unexposed frame.

FIG. 20A is a view showing the arrangement of the aperture AP of the camera, the photodetector 91 and the magnetic head 85.

In FIG. 20 (B), the magnetic head 85 has magnetic recording up to the magnetic track fe ₄ of the fourth frame f4, it is judged that it has been exposed, and the fifth frame f5 is detected at the timing of detecting the _eleventh perforation Fb _11. The reproduction of the magnetic track fe ₅ is started. If no magnetic information is recorded on the magnetic track fe ₅ of the fifth frame f5, the fifth frame f5 is unexposed. At this time, since the fifth frame f5 has already passed through the aperture AP of the camera, the film has to be rewound. The number of exposed frames in this case is calculated by the following formula.

Number of exposed frames = (number of counted perforations−3) / 2 = (11-3) / 2 = 4 FIG. 20C is a diagram showing a state in which the film F is rewound. Film F is rewound to this position
By detecting the _tenth perforation Fb ₁₀ , the unexposed frame (fifth frame f5) correctly faces the aperture AP.

Next, a flowchart of the camera of the present invention will be described with reference to FIGS. 21 to 32. First, the main routine will be described with reference to the flowchart of FIG.

In flow 601, resetting is performed by loading the battery 510, and the program starts. On the 602, reset ports such as switch inputs, flag and R
Clear the contents of AM.

Thereafter, at 603, the flag and R are read from the E ² PROM.
The state before AM reset is read. At 604, it is judged from the flag F _C whether or not the cartridge C is loaded before the reset, and if there is not, the routine proceeds to 605. In 605, the cartridge loading switch S _C is detected, and when not loaded, in 609, the cartridge lid switch S _B is detected.
If it is detected to be open, then at 610 the flag F _B is set. If 609 detects that the lid is closed, 611
In the judgment of the F _B. This is for autoloading. At 612, the main switch S ₀ is detected and 0
If so, turn off the power at 613, and if on, turn on the power at 614.

At 615, the opening / closing of the cartridge lid switch S _B is detected, and if it is open, no further operation is performed.

At 616, the rewinding switch S _R is detected, and when it is pressed, the rewinding is performed halfway only when it is judged at 617 that the cartridge C is present. When the cartridge C is not present, the rewinding is not performed. . Release switch S _{1 for} 618
It is determined whether or not is pressed, and if it is pressed, light measurement and distance measurement are performed in 619, it is determined in 620 whether the photometry result is low brightness, and if it is low brightness, strobe charging is performed in 621.

At 622, the opening / closing of the cartridge lid 30 is detected, and if opened, the process returns.

In 623 and 624, the release switches S ₁ and S ₂ are detected, and when S ₂ is pressed, after performing focus adjustment at 625,
The shutter is driven to perform exposure. At the same time, the optical information F _g is optically recorded on the film F by the LED 93 according to the mode selected by S _A. At 626, it is determined whether or not the exposure operation has been correctly performed. If not, at 627, the flag F _SE is set, the flag is stored in the E ² PROM, and then the error routine E2 is executed. If the exposure operation is correctly performed, it is detected at 628 whether the cartridge C is loaded, and if not, the process returns to the original state, and if it is performed, the winding operation is performed after 629. The operations after 629 will be described in detail later.

Next, the autoload routine is shown in FIG.
A description will be given based on the flowchart. In 609 of the main routine, the closed state of the cartridge lid 30 is detected, and
If it is determined in 11 that the lid was opened immediately before, after resetting the flag F _B in 638, it is detected in 639 whether the cartridge C is loaded, and if loaded, in 640 before the cartridge lid is opened. Detects if it was loaded. This is the case when the lid is opened in the middle of shooting with the cartridge C loaded. Here, if it is determined that the cartridge C is newly loaded, the automatic load routine of 641 is entered, and it is determined at 642 whether or not the automatic load is normally performed by the flag F _C. If there is an error, the error processing routine is executed. If not, the flag F _C is set and the process returns.

When the auto load routine is entered, the flag FL indicating that the auto load is being _executed is set at 701, and E ² is set.
After storing in the PROM, the feeding is started at 702, and the timer t ₁ for detecting the autoload error is set.

Reference numeral 703 designates a photo reflector (photodetector) 91.
Whether or not the leading edge of the film has passed above is detected, and when detected, the t ₁ timer is reset. If it cannot be detected within t ₁ hour, it is judged as an autoload error and jumps to the error routine.

At 704, the first perforation Fb ₁ is detected. Here, if the first perforation Fb ₁ cannot be detected within the fixed time t _2, it is determined that an autoload error has occurred.

When the first perforation Fb ₁ is detected, R _SP is set at 705 and stored in E ² PROM.
Then, the magnetic information Ff of the film tongue end Fd is read.

At 707, it is determined whether the magnetic information can be read correctly. If the magnetic information cannot be read, it is determined that the magnetic reproducing circuit has failed, and the routine proceeds to error routine E5. At 708, it is determined whether the cartridge C loaded is unused or partially used based on the magnetic information F _f of the film tongue end Fd.

At 709, if it is a partially used film, a flang F _U indicating it is set and stored in the E ² PROM. At 710, the second perforation Fb ₂ of the film F is detected. This timing is the tongue end F of the film.
d is the timing at which the reel 62 winds more than 1.5 turns.

Next, at 711, R _SP is set and stored in the E ² PROM. Bar code reading starts at 712. Bar code reading is performed by interrupt processing or the like in parallel with subsequent detection of perforation. Reading mistakes can be eliminated by taking a method of reading a plurality of times (for example, three times) in order to improve the bar code reading accuracy and adopting the data that appears the most when the read data is different. As a specific reading method, a rotating barcode disc 1
Is read by a sensor (photo reflector) 34 at regular time intervals, and the elapsed time of the bar and the space is measured. The data of 1 and 0 is judged according to the length of this measurement time.

Next, at 713, perforation is detected. Here, if the third perforation Fb ₃ cannot be detected within the fixed time t ₃ , it is determined as an autoload error. When the third perforation Fb ₃ is detected, 714
Then, R _SP is set, stored in the E ² PROM, and the magnetic information in the 715-frame portion (aperture) AP is reproduced and read. If there is read magnetic recording at 716, it has already been exposed, so perforations are detected at 717 and 718, and steps 713 to 718 are repeated until an unexposed frame is found.

If there is no magnetic recording in 716, it is judged as an unexposed frame, and in 719, the number of film frames R _{ED taken} is half the number of perforations already counted minus 3, so this is set in the E ² PROM. Remember. After that, at 726, it is judged whether the barcode reading is finished or not, and if it is not finished, the reading is continued and 72
At 4,725, the perforations between them are detected and counted.

[0095] 708 If it is determined not to be part used film to reset the F _U in 720, it sets the photographed frame number R _ED to 0, is stored in the E ² PROM.

In 721, the second perforation Fb ₂
To detect. This timing is a timing at which the film tongue end portion Fd is wound around the reel 62 for 1.5 turns or more.

At 722, R _SP is set and stored in the E ² PROM.

At 723, bar code reading is started. Since this part is the same as the description of 712 above, it will be omitted.

From 724 to 726, perforations are detected until the barcode reading is completed, and the number is counted to E.
² Store in PROM.

When the reading of 726 is completed, the film F is rewound in order to set the first unexposed frame at 727.
At this time, the perforation number R _cp to be counted is calculated.

In 728 to 730, perforation is detected until R _cp becomes 0.

[0102] Reset the F _L at 731 and stored in the E ² PROM, the first unexposed frame by stopping the rewinding faces the aperture AP, automatic loading is completed.

Here, t ₁ , t ₂ , and t ₃ will be described in detail. As shown in FIG. 15, the distance from the center of the cartridge C to the photo reflector 91 is a, and the photo reflector is
The distance from 91 to the center of the reel 62 is P ₁ a, the distance from the photo reflector 91 to the center of the drive roller 78 is P ₂ a,
From the tip of the film shown in FIG. 1 to the first perforation F
The distance to b is r · d, the first perforation Fb
Assuming that the distance from ₁ to the second perforation Fb ₂ is d, t ₁ , t ₂ and t ₃ may be set by the feeding speed so that the time is proportional to the ratio of the lengths a, rd and d. But,
In this embodiment, the feeding speed of the cartridge C and the driving roller 78
Since the feed speed of the reel and the winding speed of the reel 62 are different from each other, this speed difference must be taken into consideration. here,
When the feeding speed of the cartridge C is v, the feeding speed of the driving roller 78 is q ₂ v, and the winding speed of the reel 62 is q ₁ v,
Each of t ₁ , t ₂ , and t ₃ can be represented by the following items _{1 to 3} , and it is desirable to set the time by each value.

[0104]

[Equation 1]

However, it is not possible that the delivery speed immediately reaches the speed v at the start of autoloading, and it is also possible that the leading edge of the film is difficult to come out of the cartridge due to the rising time of the motor and the condition of the film inside the cartridge. Therefore, it is more desirable to set t ₁ to be slightly longer than the value obtained by the equation, and the value to be made longer is determined by an experiment or the like.

Further, in this embodiment, the magnetic head 85 is provided in the film passage, and when the leading end of the film reaches the magnetic head 85 during auto loading, the film feeding speed may be reduced or the film may be stopped for a moment. Therefore, it is more desirable to set t ₂ slightly longer than the value obtained by the formula in consideration of this. The lengthening value may be set to an appropriate value through experiments or the like.

If the leading edge of the film or perforation cannot be detected within the specified time, an error routine is performed. If automatic loading error is detected, skipping the automatic loading error routine (AE1) 750 in FIG. 23, it sets the flag F _AE, flag F _R1 indicating that the rewinding showing the autoload error 751, resets the F _L Then, the data is stored in the E ² PROM and the rewinding is started.

If R _SP is not 0 in 752, the process proceeds to 753, and 75
From 3 to 755, count perforations until R _SP becomes 0. When R _SP reaches 0, the 756 detects that the leading edge of the film has passed, and then waits for a predetermined time at 757 to ensure that the leading edge of the film has been wound into the cartridge.
By detecting the reference position S _U at 758, the spool is returned to the state before loading, and at 759, F _R1 is reset and E ² PROM
Then, the rewind is stopped. If the perforation cannot be detected within 75 seconds in 753, it is determined that the rewinding is abnormal, the flag F _RE indicating the rewinding error is set, and the process goes to 757.

Next, the rewinding routine will be described with reference to FIGS. 24 to 26. If the number of remaining frames in the film is 1 in 629 in the main flow, the rewind routine of 800 is skipped.

In step 801, F _K is set, R _ED and R _CX are calculated, feeding is started, and the result is stored in the E ² PROM. 802
At 803, magnetic recording is started after the first perforation is detected at. When the magnetic recording is completed at 804, the second frame cannot be detected because the second frame does not have the second perforation, so at 805, the flag F _R1 indicating the rewinding is set,
Store in E ² PROM and start rewinding.

At 806, it is determined whether or not the cartridge lid 30 is opened during rewinding. When opened, at 807, the rewinding is stopped, and at 808, it is determined whether or not the cartridge lid 30 is closed and closed. At 809, rewinding starts again.

At 810, the first perforation is detected after the start of rewinding. Here, it is possible that perforation cannot be detected immediately due to film slack, etc., so the error detection time for the 811 was set to be long.

When the first perforation is detected in 810, R _SP is set in 812, stored in the E ² PROM, and the process proceeds to 813. 814 to 825 detect perforations. 81
At 3, it is determined whether the number of perforations is even or odd. If the number is even, the part where the perforation interval between screens is short is detected. If the number is odd, the part where the perforation interval is long is detected. Therefore, the error detection time when detecting the perforations at 818 and 824 is 819 respectively. , 825 are different.

Reference numerals 814 to 817 and 820 to 823 determine whether or not the cartridge lid 30 is opened during perforation detection during rewinding. When opened, the rewinding is stopped at 815 and 821, and 816 and 820 At 822, it is determined whether or not the cartridge lid 30 is closed, and if closed, rewinding is started again at 817 and 823.

At 826, R _SP is calculated and stored in the E ² PROM, and at 827 it is judged whether the number of perforations is 0 or not.

Reference numerals 828 to 829 determine whether or not the cartridge lid 30 is opened during the detection of the leading edge of the film. When opened, the rewinding is stopped at 829 and the cartridge lid 30 is opened at 830.
Is closed, and if closed, rewinding is started again at 831.

At 834, whether R _SP is 1 or not is determined. This is because when the number of perforations becomes 1, the magnetic head reaches the magnetic recording portion of the film tongue end portion Fd.
This is for magnetic recording. In 835, magnetic recording indicating the end of shooting is performed.

At 832, it is detected whether or not the leading end of the film has passed over the detecting element, and at 833, a waiting time of 3 seconds is made, and after the leading end of the film is surely wound into the cartridge C, the process proceeds to 852 onward in FIG. .

FIG. 26 is a flow chart at the end of rewinding. In the case of midway rewinding, in the case of shooting all frames, is continued from FIG. 24 and FIG.

In 852, the bar code reading sensor 34 starts the reading of the bar code 1 in order to display the full use of the cartridge C. Specifically, the bar code is rotated once or more, and the time required for one rotation is measured based on the number of times the read signal is switched. At 853, the bar code pattern is determined from the time required for each bar and the space of bar code 1, and the reference position is detected. In order to stop the spool 2 at a position where the cartridge C displays a used state, it is sufficient to stop the spool 2 at a position rotated by 180 degrees from the position where the bar code reading sensor 34 detects the reference position. At 854, the spool 2 is rotated for 180 degrees from the reference position, at 846, rewinding is stopped, and each flag F _FE , F _R1 , F _R2 is reset. In 847, the rewind end display is displayed on the camera display, and in 848, the cartridge chamber 3
Wait until the lid 30 of 2 is opened, and if opened, set the flag F _B at 849, detect that the cartridge C is taken out of the camera at 850, then reset the flag F _C at 851, and put it in the E ² PROM. The storing and rewinding routine ends.

Next, the case where the midway rewind switch is pressed at 616 will be described. When the midway rewind routine is entered at 860 (FIG. 25), a flag F _R2 indicating that midway rewind is being performed is set at 861 and stored in the E ² PROM, and the rewind is started. 862-889 is rewind routine 806-8
Performs the same operation as 33. However, in the magnetic recording of 891, magnetic recording is performed to indicate that the magnetic recording unit F _f at the tongue end of the film has been midway rewound. After that, at 889, after the leading edge of the film is surely wound into the cartridge C,
841 and 842 detect the reference position by the bar code. Since this is the same content as the above-mentioned 852, 853, the description is omitted. In the case of rewinding on the way, the spool 2 must be stopped at the position where the cartridge C indicates the partial use, that is, the position rotated by 210 degrees from the reference position. It is rotated and the above-mentioned processing after 846 is performed.

Next, various error routines will be described.

First, the autoload error will be described with reference to FIG. When an autoload error occurs in the 641 autoload routine, the flag F _AE indicating the autoload error is set to 1, so 642 jumps to 900. 901
Then, a warning display indicating an autoload error is displayed, and 902 detects whether or not a rewind error has occurred. 903, 904,
The release switch S ₁ and the cartridge lid switch S _B are detected. 907 when the release switch S ₁ is detected
The warning display is canceled with, the flag is reset with 908, and auto loading is performed again. When it is detected that the cartridge lid 30 is opened, the warning display is canceled at 905, the flag is reset at 906, and the process returns to the first loop.

Next, the shutter error routine will be explained.
It will be explained based on 28. When it is detected in 626 that the exposure is not normally performed, a flag F _SE indicating a shutter error is set in 627, a jump to 910 is performed, and a shutter error warning is displayed in 911. Since it is considered that the shutter error does not open the shutter or the shutter opens all the time, the camera does not operate thereafter, and by repairing, F _SE is reset and returns to the original state.

[0125] Next, a diagram of the mid-staying routine is shown.
It will be explained based on 30. It is conceivable that the perforations cannot be detected within the specified time at 632 or 634 when the film is wound. It is considered that the cause is that the bar code information or the magnetic information of the tongue end portion is read, the reading error of the specified number of frames, or the deformation of the film F in the cartridge C. In this case, the tension routine in the middle of 920 is entered, and in 921, a flag F _FE indicating that winding is abnormal and a flag F _R1 indicating that rewinding is being performed.
Set, store in E ² PROM, and start rewinding. 9
The first perforation after the start of rewinding is detected at 22, and if it cannot be detected within the specified time, it jumps to the rewinding error routine. If detected, R _SP is decremented by 1 in 924 and stored in the E ² PROM, and then the normal rewinding routine is returned to. In this case, the fact that the tongue portion of the film is tentatively stretched, the number of frames photographed, etc. are recorded, and the spool 2 is stopped at the position where the usage indication is "used".

Next, the rewind error routine will be explained.
It will be explained based on 31. When an abnormality occurs during rewinding and perforation cannot be detected, the rewinding error routine of 930 is entered.

At 931, a flag F _RE indicating a rewinding error is set, at 932 a warning message indicating that there is a rewinding error is displayed, at 933 the rewinding is stopped, and at 934, it is stored in the E ² PROM, and 935 The fact that the cartridge C has been taken out is detected at step 936, and the flag F _RE is reset at 936 to return to the original state. However, if the rewinding actually stops halfway, the film remains out of the cartridge C. , The cartridge C cannot be taken out. Therefore, when a rewind error occurs, the back cover of the camera is opened and the film is taken out.

Next, the magnetic recording / reproducing error routine will be described with reference to FIG. At the time of auto loading, the magnetic information of the tongue end of the film is read by 724.
If it cannot be read by 5, jump to the 940 magnetic recording / reproducing error routine. This camera cannot determine whether the loaded cartridge C is unused or partially used at the time of loading, and it can determine the partial use by reading the magnetic information of the tongue end. Therefore, the magnetic information can be read. If not, the use of the cartridge C is prohibited to prevent double exposure of the partially used film. However, in order to prevent shooting from becoming impossible due to a temporary reproduction error, a flag F _ME indicating that there was a magnetic reading error was set at 941 and stored in the E ² PROM, and then the first perforation Fb ₁ Rewind to the front, wait for time at 944, reset the F _{ME at} 945 and 946, rewind after memory, detect the perforation at 947, and read magnetic information again at 950. . 95 if the information is successfully read here
Although it will return from 1 to the original, if it fails, a warning display of magnetic information reading failure is displayed in 952, and F is displayed in 953.
Set _ME again and store in E ² PROM, then rewind the film. Then, after the film front end is completely wound into the cartridge C in 954 to 957, the reference position is detected in 959 to return the use indication to the state before loading, and the rewind is stopped in 960. The magnetic recording / playback section is an indispensable part for distinguishing the partially used film.If the magnetic information cannot be read, double exposure accident of the partially used film may occur, so the warning display is continued on 961. , Do not operate the camera after that. In this case, it does not recover until repair is done. Further, if the perforations are not detected within the specified time in 943, 948, and 955, it goes without saying that each error routine is skipped.

Finally, the initial judgment routine will be described with reference to FIG. If the battery 510 is disconnected during camera operation, is reset to the microcomputer, returns to 601 in the main flow, flag E ² PROM, the contents of the RAM is stored, reads the contents of the E ² PROM in 603 To be done.
If the cartridge C is loaded before the battery 510 is removed, the process jumps from 604 to the initial determination routine.

At 971, it is judged from the flag whether or not the automatic loading is in progress, and if the automatic loading is in progress, the process jumps to 980. In 980, it is determined whether or not the bar code information is read, and if not read, the film is rewound once in 981 and after waiting for 3 seconds so that the film is reliably wound in 982, the auto is restarted. To load, return to the auto load routine.

At 983, the number of perforations detected after the start of autoloading is checked. This is because the magnetic information of the film is read after detecting one perforation. If the perforation is not detected yet, the process proceeds to 984, the film feeding is started, and the process returns to the autoload routine. If 983 determines that perforation has already been detected, the battery 510 is
Since it has been removed, the film is rewound once before the perforation at 985 to 987, the film feeding is restarted at 988, and the process returns to the autoload routine.

At 972, it is detected whether or not an autoload error has occurred, and if so, jump to an autoload error routine. At 973, it is determined whether the feeding is in progress. If it is in the middle of feeding, proceed to 989 to determine whether or not the number of perforations to be counted is two. If it is 2, the first perforation has not been detected yet, so feeding is started at 989 and the process returns to the main flow. If the perforation to be counted is not 2, it means that the magnetic recording was in progress, so after rewinding before the first perforation at 990 to 992, feeding again at 993 and returning to the main flow. , Magnetic recording will be performed again.

At 974, it is determined whether or not the rewinding is being performed. If rewinding is in progress, rewind starts at 994. 995 measures the number of perforations from the tip of the film.
If this number is 0, only the leading edge of the film should be detected after this, and if it is not 0, the remaining perforations must be detected, so the location of the return to the rewinding routine is different. 975 is a judgment as to whether or not the rewinding is being performed on the way, but it is the same as 994 and 995 except that the place of return is different.

At 976 to 978, the presence or absence of a shutter error, an autoload error, and a rewind error is determined, and if detected, the routine proceeds to each routine. In 979, it is judged whether or not there is a magnetic reading error. If there are errors go to 998, 9
If it is determined in 98 that rewinding is in progress, rewinding is started in 999 and the process returns to the error routine. If the flag is not detected by 979, it is determined that the camera is not operating before the battery 510 is removed, and the process returns to the standby state of the main routine.

Next, the relationship between the film used in this embodiment and the taking lens will be described. Polyethylene naphthalate is used as the base of the film, and polyethylene naphthalate has a characteristic that it mainly reacts with ultraviolet rays of 220 to 380 nm and emits fluorescence. Therefore, due to the ultraviolet rays received at the time of photographing, the fluorescence from the film base continues after the shutter is closed and before the film is developed, so that fogging occurs even if the amount of received ultraviolet rays is small and the amount of fluorescence is very small.

Therefore, at least a photographing lens having an optical component formed of a material that does not transmit ultraviolet rays may be used. That is, PMMA (polymethylmethacrylate) which is a plastic material, SF type glass, or L
An optical system having at least one optical component made of aSF glass may be formed. In addition, in order to expand the degree of freedom of the configuration of the optical system and increase the efficiency of ultraviolet ray cut,
The UV cut coating may be used in combination with the optical component made of the above material, or may be applied to the optical component made of another material. In particular, PMMA cuts ultraviolet rays of 380 nm or less and has good moldability, so aspherical lenses can also be processed.
Most preferred as a material used for an optical system.

[0137]

As described in detail above, according to the present invention, the film is in the rewinding state, and when the motor is rotated in the winding direction, the third gear meshes with the spool gear.
Even if the first planetary gear meshes with the reel gear before the planetary gear is disengaged, the driving force of the motor is not immediately transmitted to the reel, so the spool gear is not subjected to the force of the film, and the third planetary gear is positive. Can be disengaged from the spool gear. Therefore, it is possible to freely switch to winding even during rewinding. Therefore, stable bar code reading is possible without the reference signal generator, cost reduction and reliability improvement are achieved, and quick shooting preparation is realized. Further, when the partially exposed film is reloaded into the camera, the film can be easily located at the beginning.

[Brief description of drawings]

FIG. 1 is a front view showing a state in which a film is pulled out from a cartridge.

FIG. 2 is a plan view of a cartridge.

FIG. 3 is a plan view of a barcode disc.

FIG. 4 is a cartridge diagram showing a usage state of a film.

FIG. 5 is a front view of the camera.

FIG. 6 is a plan view of the camera.

FIG. 7 is a rear view of the camera.

FIG. 8 is a bottom view of the camera.

FIG. 9 is a perspective view showing a state in which a cartridge is dropped in or dropped out from a cartridge chamber.

FIG. 10 is a bottom view of the cartridge chamber viewed from the cartridge lid side.

FIG. 11 is a sectional view showing the operation of the cartridge and the cartridge detection pin.

FIG. 12 is a view showing a field of view of a finder.

13A and 13B are a plan view and a sectional view of a film feeding mechanism.

FIG. 14 is a perspective view of a film feeding mechanism.

FIG. 15 is a sectional view and a plan view of a torque limiter provided on the first planetary gear.

16A and 16B are a cross-sectional view and a plan view of a torque limiter provided on a spool shaft.

FIG. 17 is a sectional view of a torque limiter provided on a reel.

FIG. 18 is a block diagram showing a circuit configuration of a camera.

FIG. 19 is a diagram illustrating a film feeding process.

FIG. 20 is a diagram illustrating a film feeding process.

FIG. 21 is a flowchart of a main routine.

FIG. 22 is a flowchart of an auto load routine.

FIG. 23 is a flowchart of an autoload error routine.

FIG. 24 is a flowchart of a rewinding routine.

FIG. 25 is a flowchart of a rewinding routine.

FIG. 26 is a flowchart of a rewinding routine.

FIG. 27 is a flowchart of an autoload error routine.

FIG. 28 is a flowchart of a shutter error routine.

FIG. 29 is a flowchart of an intermediate thrust routine.

FIG. 30 is a flowchart of a rewind error routine.

FIG. 31 is a flowchart of a magnetic recording / reproducing error routine.

FIG. 32 is a flowchart of an initial determination routine.

[Explanation of symbols]

 C Cartridge F Film 1 Bar code disk 2 Spool 33 Spool shaft 34, 91 Photodetector (photo reflector) 61 Film feeding motor 62 Reel (take-up reel) 72 Second planetary gear 73 Spool gear 74 Third planetary gear 75 No. 1 Planetary gear 77 Reel gear 85 Magnetic head 751 Drive gear 753 Idle gear 753A, 751A, 33B, 77A Saw gear 754, 731, 771 Coil spring (elastic member) 755, 733, 773 Small ball

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriyuki Kaeda 2970 Ishikawacho, Hachioji City, Tokyo Konica Stock Company

Claims (5)

[Claims] 1. A film wound on the spool, which comprises a rotatable spool provided for winding and storing the film, and a bar code disc formed integrally with the spool and recording film information. Is kept light-tight, and in a state where a cartridge provided with a window for detecting film information recorded on the barcode disc is loaded, the film in the cartridge is fed out and wound on a take-up reel, or In a camera equipped with a film feeding means for rotating the spool to rewind the film into the cartridge, a sensor means for detecting film information on the bar code disc and a film leading end portion on the take-up reel. A film feed detecting means for detecting that the film has been wound and outputting a detection signal; In response to the output of the detection signal of the output means, the detection of the film information by the sensor means is started, and in response to the end of the detection of the film information by the sensor means, the film is rewound to the first frame. A camera comprising: a control unit that drives a film feeding unit. 2. The film is wound up on a spool in a cartridge, and the leading end portion of the film is sent out by driving rotation of the spool, passes through a photographing screen portion, is wound on a winding reel, and then the film is driven on a winding reel. In a camera that winds up by rotation and exposes an image, forward rotation is used to wind up a film on a take-up reel, and reverse rotation is used to rewind the film on a spool in the cartridge, and the winding motor. The reel gear that rotates integrally with the take-up reel, the spool gear that rotates integrally with the spool, the first planetary gear that drives the reel gear during winding and disengages during rewinding, and the spool gear during winding. The second planetary gear that is driven and disengages during rewinding, and the spool gear that is driven during rewinding A third planetary gear that disengages when raised,
A reduction gear group in which a film feeding speed by the take-up reel is set to be faster than a film feeding speed by the spool, and when the motor is normally driven in a rewinding state, the third planetary gear is the spool. A torque limiter is provided on the first planetary gear so that the driving force of the motor is not immediately transmitted to the reel gear even if the first planetary gear meshes with the reel gear before being disengaged from the gear. Characteristic camera. 3. The first planetary gear comprises a first drive planetary gear that meshes with a sun gear and a first driven planetary gear that meshes with a reel gear, and the first drive planetary gear and the first planetary gear.
The driven planetary gear is loosely fitted on a common shaft and rotatable independently, and the first drive planetary gear and the first driven planetary gear are pressed with a predetermined pressure contact force by the torque limiter made of an elastic member, When the first drive planetary gear is rotated, the first driven planetary gear and the reel gear are rotated by the pressing force of the elastic member so that the driving force is not immediately transmitted to the reel gear. The camera according to item 1. 4. The film is wound up on a spool in a cartridge, and the leading end of the film is sent out by driving rotation of the spool, passes through a photographing screen section, is wound on a winding reel, and then the film is driven on a winding reel. In a camera that winds up by rotation and exposes an image, forward rotation is used to wind up a film on a take-up reel, and reverse rotation is used to rewind the film on a spool in the cartridge, and the winding motor. The reel gear that rotates integrally with the take-up reel, the spool gear that rotates integrally with the spool, the first planetary gear that drives the reel gear during winding and disengages during rewinding, and the spool gear during winding. The second planetary gear that is driven and disengages during rewinding, and the spool gear that is driven during rewinding A third planetary gear that disengages when raised,
A reduction gear group in which a film feeding speed by the take-up reel is set to be faster than a film feeding speed by the spool, and the reel gear is rotatably urged by an elastic member on an axial end surface of the take-up reel. When a torque limiter for pressure contact is provided and the film rewinding mode is switched to the winding mode, the driving torque from the motor is immediately transmitted to the take-up reel via the first planetary gear and the reel gear due to the frictional force of the torque limiter. A camera characterized by not doing so. 5. The film is wound up on a spool in a cartridge, and the leading end of the film is sent out by driving rotation of the spool, passes through a photographing screen section, is wound on a winding reel, and then the film is driven on a winding reel. In a camera that winds up by rotation and exposes an image, forward rotation is used to wind up a film on a take-up reel, and reverse rotation is used to rewind the film on a spool in the cartridge, and the winding motor. The reel gear that rotates integrally with the take-up reel, the spool gear that rotates integrally with the spool, the first planetary gear that drives the reel gear during winding and disengages during rewinding, and the spool gear during winding. The second planetary gear that is driven and disengages during rewinding, and the spool gear that is driven during rewinding A third planetary gear that disengages when raised,
A reduction gear group in which the film feeding speed by the take-up reel is set to be faster than the film feeding speed by the spool, and the spool gear is rotatably pressed against the shaft end surface of the spool by an elastic member. A torque limiter is provided so that the drive torque from the motor is not immediately transmitted to the spool via the second planetary gear due to the frictional force of the torque limiter when the film rewinding mode is switched to the winding mode. And the camera.