JPH0553189A - Camera - Google Patents

Abstract

PURPOSE:To detect abnormality in feeding a film in a camera. CONSTITUTION:As to this camera using a film cartridge 33 provided with a rotating body which is integrally rotated with a film supply spool 33b in the film cartridge 33 and where the information with reference to the film 27 is encoded, this camera is provided with a means for reading the information encoded on a disk 33a and a timer for counting a time required by the read signal in a prescribed section, and in the case that the time counted by the timer is equal to or exceeding the prescribed time, film feeding is stopped. Since bridging in feeding the film can be detected by the bar code reading means in the film cartridge 33, the need of a conventional bridge detecting means can be eliminated, so that the constitution of the camera can be simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a film cartridge which rotates integrally with a film supply spool in the cartridge and has a rotary member on which information about the film is recorded in a symbolized manner.

[0002]

2. Description of the Related Art A camera in which information about a film is recorded as magnetic information on a member which moves integrally with the feeding of the film and the information is read as the film is fed is disclosed in JP-A-55-22799. Has been proposed in. Further, US Pat. No. 5,023,642 proposes a disk in a film cartridge in which information about a film is recorded by a bar code, and the bar code can be read by an optical means such as a photo reflector. It is configured.

In addition to the above-mentioned proposals, the following means have been considered as means for detecting an abnormal film feeding such that the film feeding is stopped before the feeding of a predetermined amount of film is completed. Has been.

A means for optically detecting the perforation of the film is provided, and during the film feeding, the film feeding is stopped by detecting that the perforation signal is not generated for a predetermined time by the detecting means.

A roller that is pressed against the film and rotates as the film is fed is used to optically detect the signal pattern of the pulse plate that rotates in conjunction with the roller, and a pulse signal is generated by the detection means for a predetermined time. If not, the film feeding is stopped.

A sprocket having teeth meshing with the perforation of the film and rotating as the film is fed is used to optically detect the signal pattern of the pulse plate which rotates in conjunction with the sprocket, and the pulse is detected by the detecting means. When it detects that the signal has not been generated for a predetermined time, the film feeding is stopped.

[0007]

However, the above-mentioned conventional example has the following drawbacks.

In the case of the conventional example, since the pitch of the perforation of the film is rough and the timer set for detecting the abnormality of the film feeding is long, even if the abnormality of the film feeding occurs, the abnormality is detected. However, there is a possibility that the camera will be delayed and the degree of camera failure will further increase. Further, when a film having a larger perforation pitch of the film is used, the above-mentioned defect due to the detection method becomes more serious.

In the case of the conventional example, since the pitch of the pulse plate can be freely set, the time of the timer can be shortened and the abnormality of the film feeding can be detected immediately. There is a possibility that a slip may occur between the above and the detection means, and the above detection means may malfunction. Further, when the pressure contact force of the roller is large, slippage is less likely to occur, but since the pressure contact force is added to the load of film feeding, it is necessary to use a feeding motor having a larger output.

In the case of the conventional example, similarly to the above, the pitch of the pulse plate can be freely set and the time of the timer can be shortened, but since the sprocket requires a large space, the camera becomes large. There was a drawback.

The present invention has been made to solve the above problems, and provides a camera capable of detecting an abnormality in film feeding with a simple structure and reducing the load of film feeding. The purpose is to

[0012]

In order to achieve the above-mentioned object, the camera of the present invention is a film feeding means for feeding a film, and the rotation member is coded with the rotation of the film feeding spool. And a timer for measuring the required reading time of a predetermined section of the signal read by the information reading means, and when the time measured by the timer is longer than the predetermined time, A means for stopping the film feeding by the film feeding means is provided.

[0013]

According to the present invention, the information reading means for reading the coded information of the rotating member and the timer for measuring the time required for the predetermined section of the signal read by the information reading means are provided to feed the film. I am trying to detect abnormalities.

[0014]

1 to 7 show a first embodiment of the present invention, and a film cartridge most suitable for this embodiment is the one proposed in U.S. Pat. No. 4,834,306.

The film passing slit, one end of which is fixed to the supply spool and which is wound around the supply spool, is coaxially arranged with the supply spool, and the radial expansion of the outermost circumference of the film is regulated by the regulation portion. Then, the pressing member that prevents the outermost periphery of the film from contacting the inner wall of the film cartridge at a substantial point and a part of this pressing member are deformed, and the outermost peripheral portion of the film is continuously controlled from the radial restriction of the pressing member. It has a releasing part for releasing and a guiding part for guiding the part of the film released from the regulation to the film passage slit, and the outer circumference of the film is expanded due to the expansion of the outermost circumference due to the loosening of the film caused by the rotation of the supply spool in the film extrusion direction. Make sure there is no slip between the presser and the holding member, and apply a driving force in the extrusion direction to the film, It is obtained by allowing the extrusion of Lum. After that, due to the rotation of this kind of supply spool,
A film cartridge capable of ejecting a film will be referred to as an extrusion type (thrust type) film cartridge.

If this push-out type film cartridge (hereinafter referred to as a cartridge) is used, after the camera is loaded, the supply spool of the cartridge is rotated by a fork, the film is discharged, and the film is wound on the film take-up spool of the camera. The film can be extruded up to and then the film can be fed by a film take-up spool.

FIG. 1 is a perspective view of a film feeding mechanism according to an embodiment of the present invention, FIG. 2 is a plan view of a gear train when the film is wound in FIG. 1, and FIG. It is a top view of a gear train at the time of returning. Also, FIG.
FIG. 5 is a perspective view of a film cartridge which is an embodiment of the present invention, and FIG. 5 is a vertical cross-sectional view of the cartridge chamber when the film is loaded in FIG.

1 to 5, reference numeral 1 denotes a film driving motor, which is normally rotated when the film is wound (see arrow B in FIG. 2).
Direction), and at the time of film rewinding, the point is reversed (direction of arrow C in FIG. 3). Reference numeral 2 is a pinion gear fixed to the rotating shaft of the motor 1. A first sun gear 3 meshes with the pinion gear 2. Reference numeral 4 denotes a first planetary gear, which meshes with the first sun gear 3. Reference numeral 5 connects the first sun gear 3 and the first planetary gear 4, and generates a frictional force between the first sun gear 3 and the first planetary gear 4 while generating a frictional force between them.
Is rotatably held, and the first planetary gear 4 is revolved around the first sun gear 3 as a rotation center by the rotation of the first sun gear 3. is there. The first sun gear 3 and the first planetary gear 4
A well-known planetary gear mechanism is constituted by the first connecting lever 5 and the first connecting lever 5. Reference numeral 6 denotes a spool gear that meshes with the first planetary gear 4 only when the film driving motor 1 rotates in the normal direction.
Reference numeral 7 denotes a film take-up spool which is fixed to the spool gear 6 and moves integrally.

Reference numeral 8 is a first idler gear which is constantly meshed with the first sun gear 3, and 9 is a large gear portion 9a and a small gear portion 9b.
A first two-stage gear having a large gear portion 9a meshing with the first idler gear 8; a second idler gear 10 meshing with a small gear portion 9b of the first two-stage gear 9; No. 3 idler gear 10 meshing with the third idler gear 10, and No. 12 second mesh engaging with the third idler gear 11.
Is a second sun gear, and 13 is a second planetary gear that meshes with the second sun gear 12. Reference numeral 14 denotes a third planetary gear, which, like the second planetary gear 13, meshes with the second sun gear. Numeral 15 connects the second sun gear 12, the second planetary gear 13 and the third planetary gear 14 with arm portions 15a and 15b, respectively, and rotatably holds each planetary gear while generating frictional force. The second planetary gear 13 and the third planetary gear 14 are second connecting levers that revolve around the second sun gear 12 as a rotation center by the rotation of the second sun gear 12. The second sun gear 1
The second, second and third planetary gears 13, 14 and the second connecting lever 15 constitute a known planetary gear mechanism.

Reference numeral 16 denotes a fourth idler gear, which is rotated by the leftward rotation of the second connecting lever 15 about the second sun gear 12 when the film drive motor 1 is rotated in the normal direction. Meshes with the third planetary gear 14 and does not mesh with the third planetary gear 14. When the motor 1 rotates in the reverse direction, the second coupling lever 15 rotates to the right to mesh with the third planetary gear 13 and not with the second planetary gear 13. It is a gear. Reference numeral 17 has a large gear portion 17a and a small gear portion 17b, and the large gear 17a is the fourth gear portion.
The second two-stage gear 18, which meshes with the idler 16 of the above, has a large gear portion 18a and a small gear portion 18b.
Is a third two-stage gear that meshes with the small gear 17b of the second two-stage gear 17, 19 is a fork gear that meshes with the small gear portion 18b of the third two-stage gear 18, and 20 is integral with the fork gear 19 The rotating fork rotates the supply spool 33b in the film cartridge 33 (see FIG. 5), which will be described later, so that the film 27 is pushed out and wound into the cartridge 33.

Reference numeral 22 is a cartridge chamber for accommodating a film cartridge. The film 27 also includes
A magnetic storage unit (not shown) is formed, and by a magnetic head (not shown) fixed to the film running surface of the camera,
Various information regarding photographing is written (or read).

FIG. 4 is a perspective view of the cartridge. This cartridge 33 is the above-mentioned thrust type film cartridge, 33b is a film supply spool, and 33a.
Is information related to film, for example, ISO speed, number of film frames, film type, etc. is coded or symbolized and expressed by a bar code, etc., and is a bar code that rotates integrally with the film supply spool. It is a disk.

FIG. 5 is a longitudinal sectional view of the cartridge chamber portion with the cartridge loaded. 33c, 33
Reference numeral d is a holding member, and 49 is a photoreflector, which is for optically reading information written on the bar code disk 33a when the bar code disk 33a rotates, and is attached to the inner wall of the cartridge chamber. Reference numeral 50 denotes a flexible printed board on which a photo-reflector 49 is mounted, and a signal for driving the photo-reflector 49 and a read signal from the photo-reflector 49 are exchanged between a control circuit (not shown). 51 is a cartridge lid,
It is rotatably attached to the camera body by a.
Reference numeral 52 denotes a cartridge pressing member made of an elastic member, which is fixed to the cartridge lid 51.
When the cartridge 33 is closed as described above, the cartridge 33 is pressed upward for positioning. Reference numeral 53 denotes a cartridge lid opening / closing switch, which detects that the cartridge lid 51 is closed by bringing the contact pieces 53a and 53b into conduction. 51 when the cartridge lid is closed
When the portion c can contact the contact piece 53a and the cartridge lid is closed, the portion 51c contacts the contact piece 53a and 53b
Make contact with. Further, when the cartridge lid is open, the contact pieces 53a and 53b are not in contact with each other. Reference numeral 54 is a cartridge lid opening / closing lever, which is a dowel 55 of the main body (not shown).
56 and the long holes 54a and 54b are slidably fitted together. The section 54c is a manual operation section. 57 is a spring, one end is the main body, and the other end is the cartridge lid opening / closing lever 54.
The cartridge lid opening / closing lever 54 is biased in the opposite manner to the arrow portion. Reference numeral 58 denotes a stopper provided on the main body (not shown), which regulates the position of the cartridge lid opening / closing lever 54 in the leftward direction. Also, the claw portions 54e and 51b
5 are engaged with each other, and in the state of FIG. 5, they are engaged with each other and hold the cartridge lid 51 in the closed position.

In the above construction, after the cartridge 33 is loaded in the cartridge chamber 22, as shown in FIG. 2, when the film driving motor 1 (pinion gear 2) is rotated in the direction of the arrow (normal rotation). ), The first sun gear 3 rotates in the clockwise direction, and the action of the first connecting lever 5 causes the first planetary gear 4 to move to the first
The sun gear 3 revolves in the clockwise direction about the center of rotation, and then meshes with the spool gear 6, the driving force of the film drive motor 1 is transmitted to the spool gear 6, and the film take-up spool 7 rotates in the clockwise direction. ..

Further, the driving force of the second sun gear 3, the second idler gear 10, and the third idler gear 8, which is another gear meshing with the first sun gear 3, is applied.
Is transmitted to the second sun gear 12 via the idler gear 11. Therefore, since the second sun gear rotates counterclockwise, the action of the second connecting lever 15 causes the second planet gear 13 and the third planet gear 14 to move to the second sun gear 1.
It revolves counterclockwise around 2 as the center of rotation, and eventually the second
The planetary gear 13 of FIG. 4 meshes with the fourth idler gear 16. As a result, the driving force in the B direction of the film driving motor 1 is transmitted to the fourth idler gear 16 as a counterclockwise driving force, and further, through the second two-stage gear 17 and the third two-stage gear 18. Transmitted to the fork gear 19,
The fork 20 comes to rotate clockwise. Here, the gear ratio of the gear train is configured as follows. The peripheral speed of the film take-up spool 7 is V ₁ , the fork 20 is
The speed of the film 27 is extruded from the cartridge 33 when the V ₂ by, in V _1> V ₂ relationship. As the film 27 is pushed out from the cartridge 33 by the clockwise rotation of the fork 20, the leading end of the film enters between the camera body and the pressure plate (not shown), and is eventually wound around the film spool 7. After that, the winding operation of the film 27 is performed only by the rotation of the film spool 7 by the motor 1, for the following reason. When the film 27 is wound around the film spool 7 due to the relationship of V ₁ > V ₂ , the film spool 7 causes the fork gear 19 and the third two-stage gear 1 to pass through the film 27.
8, the second two-stage gear 17, and the fourth idler gear 16 are transmitted in this order, and the counterclockwise rotation speed of the fourth idler gear 16 is faster than the clockwise rotation speed of the second planetary gear 13. However, at this time, the fourth idler gear 16 bounces off the second planetary gear 13, the meshing between the second planetary gear 13 and the fourth idler gear 16 is momentarily released, and the speed difference is absorbed. Because it is configured. Therefore, when the film 27 is wound around the film spool 7, the speed changes from the V ₂ speed up to that time to the V ₁ speed (V ₁ > V ₂ ). As a method of winding the film 27 around the film spool 7,
The perforation of the film 27 is hooked by a known means (a nail provided on the film take-up spool 7 or a means for pressing the film 27 provided on the camera body to the film take-up spool 7).

After that, the first frame is cueed and photographed, and the film is wound onto the next frame, which will be described later.

Next, the operation of rewinding the film will be described.

This operation will be described with reference to FIG. 3. When the film driving motor 1 is rotated in the direction of arrow C, the first connecting lever 5 and the first planetary gear 4 rotate about the first sun gear 3. As the counterclockwise direction, it revolves until the end 5a of the first connecting lever 5 contacts the stopper 28. Therefore, the mesh between the first planetary gear 4 and the spool gear 6 is released.

At this time, the second sun gear 12 rotates clockwise, so that the second planetary gear 13 and the third planetary gear 14 are actuated by the second connecting lever 15 to actuate the second sun gear 13. Revolving clockwise about 12 as the center of revolution,
The idler gear 16 and the second planetary gear 13 are disengaged from each other, and instead, the fourth idler gear 16 and the third planetary gear 14 are engaged with each other. Therefore, the fork gear 19 rotates counterclockwise, and the fork 20 causes the cartridge 3 to move.
The supply spool 33b in 3 rotates in the reverse direction, and the film 27 is wound into the cartridge 33.

FIG. 6 is an electric circuit block diagram of the first embodiment. Reference numeral 63 is a control circuit for controlling the operation of the entire camera, which incorporates a timer circuit. An AF / AE control circuit 64 includes means for measuring a distance to a subject, and performs an opening / closing operation of a shutter for controlling exposure to a film in accordance with a focusing operation of a photographing lens (not shown) and brightness of the subject.
Reference numeral 0 is a magnetic head for writing or reading information on the magnetic recording portion of the film, and 65 is a magnetic head drive circuit for driving the magnetic head 60. Reference numeral 66 is a motor control circuit for controlling the rotation of a film feeding motor which is a drive source for feeding the film, and 67 is a photo reflector 49 for operating the bar code information written on the bar code disk 33a. It is a photoreflector control circuit for reading with the rotation of the disk 33a. 68 is turned on when the cartridge 33 is loaded in the cartridge chamber. Reference numeral 69 is a release switch (not shown), which is manually turned on to start the release of the camera.

FIG. 7 shows a signal read from the bar code disk 33a by the photo reflector 49, which is (1) in the figure.
Is a plan view of the bar code disc 33a. (2) is a bar
A developed view of the bar code on the code disk 33a, (3) is the read signal.

FIG. 8 is a flow chart of the sequence of the control circuit according to the first embodiment of the present invention, and the operation of the camera will be described with reference to this flow chart.

In step 101 (hereinafter referred to as S101), the camera is loaded and the cartridge lid is closed, so that both the switches 53 and 65 are turned on, it is determined that the cartridge is loaded in the camera, and the process proceeds to S102. S
At 102, a winding start signal is sent to the film feeding control circuit 63, and the film feeding control circuit 63 supplies power to the film driving motor 1 to drive it. At this time,
The film driving motor 1 rotates in the direction of arrow B as shown in FIG. 2, and the film 2 is driven through the gear train as described above.
The extrusion from the film cartridge 33 of No. 7 is started. In S103, the photo-reflector control circuit 64 is driven, and the photo-reflector 49 reads the information about the film written on the bar code disk. Also,
Here, when it is detected that the time required for the predetermined section of the signal measured and read by the timer has exceeded the predetermined time, it is determined that an abnormality has occurred in the film feeding, and the film drive motor 1 is energized. Will be stopped, but the details will be described later. In S104, the film feed amount is calculated by counting a known means, for example, a film perforation (not shown) with a photo interrupter (not shown). Alternatively, it is determined whether or not the first frame has arrived at the aperture portion by calculating the film feed amount based on the driving time of the motor, and the film feed is continued until the first frame reaches this aperture portion. When it is determined that the first frame has reached the aperture portion, the process proceeds to S105. If not reached, the process returns to S103. In S105, the drive of the film drive motor 1 is stopped via the film feeding control circuit 63, and the AL (auto loading) of the film is stopped. In S106, it is determined whether or not the release button (not shown) is pressed and the switch 66 is turned on. If the result is affirmative, the process proceeds to step 107, the brightness of the subject is measured by the AF / AE control circuit, the distance information to the subject is calculated, and the focusing operation and shutter of the photographing lens (not shown) are controlled. A shooting operation such as a film exposure operation is performed (S107). Next, the number of releases, the amount of film feed, etc. are compared with the number of film frames read in S103 to determine whether there are any remaining frames (S10).
8). If there are remaining frames, the process proceeds to S109, and if there are no remaining frames, the process proceeds to S113. In S109, the film feeding control circuit 63 is driven to start the winding onto the next frame. S1
At 10, the same operation as S103 is performed. S111, S
If it is determined by the same method as 104 that one film of film has been wound, the process proceeds to S112, and if not, the process returns to S110. In S112, the drive of the film drive motor 1 is stopped through the film feeding control circuit 63 to stop the film winding, and then the process returns to S106. In order to start rewinding of the film (rolling into the film cartridge 33), the film driving motor 1 is driven in the film rewinding direction via the film feeding control circuit 63 (S113). In S114, the same operation as S103 is performed. Further, in S115, if it is detected that the film is wound in the cartridge by the same method as in S104, the process proceeds to S116, and if it cannot be detected, S1 is performed.
Return to 14. Then, the driving of the film driving motor 1 is stopped via the film feeding control circuit 63, and then the operation of the entire camera is stopped (S116).

FIG. 9 is a flowchart showing the details of S103 in FIG. 8, and its operation will be described below.

When the bar code on the bar code disk 33a is read by the photo reflector 49, a signal as shown in FIG. 7C is output from the photo reflector 49.
It is output to 1 (S201). Here, it is determined whether or not the output signal is a "rise" such as the position indicated by A in the figure, and if it is "rise", the process proceeds to step 202.
Next, timers T ₁ and T built in the control circuit 61
₂ is reset (S202). Then, the timer T ₁ is started (S203). In S204, it is determined whether or not the output signal from the photo reflector 49 is "falling" such as the position indicated by B in FIG. 7C, and if "falling", the process proceeds to step 205. And timer T
Stop ₁ (S205). Here, the operating time of the timer T ₁ is t ₁ . Next, the timer T ₂ is started (S206). In S207, the photo reflector 4
It is determined whether or not the output signal from 9 is a "rise" like the position indicated by C, and if it is a "rise", step 2
08, the timer T ₂ is stopped (S20
8). Here, the operating time of the timer T ₂ is t ₂ . Further, in S209, the operation time t ₁ of the timer T ₁ is, determines whether less than a predetermined time t, in the case of t ₁ <t proceeds to S210, in the case of t ₁ ≧ t proceeds to S211. Here, the predetermined time t is a little longer than the time required to read the widest barcode with the photo reflector 49 during normal film feeding (the time required to detect the rising edge to the falling edge). is there. In S210, by comparing the operating time of the timer T ₁ t ₁ and the operating time of the timer T ₂ t _2, converts the bar code original numbers, the characters, and the like. In step 209, t ₁
When it is determined that ≧ t, that is, when the film feeding is abnormal, the driving of the film driving motor 1 is stopped through the film feeding control device 63 (S21).
1), the process proceeds to S212. Then, a known warning means (LCD, LED,
A warning is given by sound or the like) (S212).

The above steps S201 to 210 are repeated until the feeding of a predetermined amount of film is completed, and the bar codes on the bar code board 33a are sequentially read.

FIG. 10 is a flow chart of the sequence of the control circuit of the second embodiment of the present invention. This embodiment is first
9 differs from the embodiment shown in FIG. 9 in S301.
Steps that perform the same operation are assigned the same numbers.

[0038] In S301, the timer T ₂ operating time t ₂
Is smaller than a predetermined time t, and t ₂
If t <t, the process proceeds to S210, and if t ₂ ≧ t, the process proceeds to step 211. The predetermined time t is S2 in FIG.
It is the same as the predetermined time t of 09.

FIG. 11 is a flow chart of the sequence of the control circuit of the third embodiment of the present invention. 9 is different from that of the first embodiment in steps S401 to S404, and other steps for performing the same operation are denoted by the same reference numerals.

In S401, the type of film feeding currently being performed is determined. If AL is in progress, the process proceeds to S402,
If it is during winding, the process proceeds to S403, and if it is during rewinding, S
Proceed to 404.

[0041] In S402～404, operating time t ₁ of the timer T ₁ is, each of the predetermined time t _a, t _b, to determine whether shorter than t _c, the process proceeds to S210 if it is affirmative, it is denied If so, proceed to S211.

As described above, according to the third embodiment, the AL
Even if the film feeding speed during winding, rewinding, and rewinding is different, the predetermined time corresponding to each can be set, so that the film feeding abnormality can be detected more accurately.

Further, the information about the film written by rotating integrally with the film feeding spool in the film cartridge is not limited to the one written by the bar code. The present proposal can be applied to the case where the magnetic head is slid and the information is read out by using a rotating body such as a disc.

[0044]

As described above, according to the present invention,
In a camera using a cartridge provided with a rotator in which information about a film is coded, information reading means for reading the coded information of the rotator, and a time required for a predetermined section of a signal read by the information reading means Since a timer for measuring the film feed rate is provided to detect an abnormality in the film feed, the conventional means for detecting an abnormality in the film feed is unnecessary, and even if the pitch of the film perforation is large, Since the time lag between the occurrence of the abnormal feeding and the detection of the abnormal feeding can be reduced, the influence of the abnormal feeding of the film can be minimized.

Since the pressure roller is not used, the load of film feeding can be reduced.

Since the sprocket is not used, the size of the camera can be made compact. There is an effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a film feeding mechanism that is an embodiment of the present invention.

FIG. 2 is a plan view of a gear train when the film is wound in FIG.

FIG. 3 is a plan view of a gear train when the film is rewound in FIG.

FIG. 4 is a perspective view of a film cartridge which is an embodiment of the present invention.

5 is a longitudinal sectional view of the cartridge chamber when the film is loaded in FIG.

FIG. 6 is a block diagram of an electric circuit according to the first embodiment of the present invention.

FIG. 7 is a time chart of a signal read by a barcode according to the first embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the control circuit according to the first embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the control circuit of the camera of the second embodiment of the present invention.

FIG. 10 is a flowchart showing the operation of the control circuit of the camera of the second embodiment of the present invention.

FIG. 11 is a flowchart showing the operation of the control circuit of the camera of the third embodiment of the present invention.

[Explanation of symbols]

 1 Film feeding motor 7 Film take-up spool 20 Fork 33 Cartridge 33a Bar code disk 33b Film supply spool 27 Film 49 Photo reflector

Claims (1)

[Claims] 1. A film feeding means for feeding the film in a camera using a cartridge provided with a rotating member which is integrally rotated with a film supply spool in a film cartridge and in which information about a film is encoded. An information means for reading the coded information of the rotating member as the film supply spool rotates;
A timer for measuring a required reading time of a signal read out by the information reading means in a predetermined section, and when the time measured by the timer is longer than the predetermined time, the film feeding means A camera provided with means for stopping feeding.