JP3143981B2 - Camera and film feeder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera which can use a film cartridge which indicates information about a film by means of an index which rotates integrally with a film supply means, and a camera film feeder applied to the cartridge. Things.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 55-22799 discloses 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 this information is read with the feeding of the film. Has been proposed. U.S. 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 is read by an optical means such as a photo reflector. It is configured.

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

A means for optically detecting the perforation of the film is provided. During the feeding of the film, the detecting means detects that the perforation signal has not been generated for a predetermined time and stops the feeding of the film.

Using a roller which is pressed against the film and rotates as the film is fed, a signal pattern of a pulse plate which rotates in conjunction with the roller is optically detected, and a pulse signal by the detecting means is generated for a predetermined time. The film feeding is stopped when it is detected that it is not performed.

A sprocket having teeth meshing with the perforation of the film and rotating with the film feeding is optically detected, and a signal pattern of a pulse plate rotating in conjunction with the sprocket is optically detected. Upon detecting that no signal is generated for a predetermined time, the film feeding is stopped.

[0007]

However, the above conventional example has the following disadvantages.

In the case of the conventional example, since the pitch of the film perforation is rough and the time of 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. Is delayed, and the degree of camera failure may be further advanced. When a film having a larger perforation pitch is used, the disadvantages of the above detection method become 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. However, when the pressing force of the roller is small, the film and the roller And a malfunction may occur in the detection means. When the pressure of the roller is large, slipping is less likely to occur, but the pressure is added to the load for feeding the film, so that a feeding motor having a higher output must be used.

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. However, the sprocket requires a large space, and the camera becomes large. There was a disadvantage.

The present invention has been made in view of the above circumstances.
And the index that rotates integrally with the film supply means.
Uses a film cartridge that shows information about the film
Camera and the cartridge
Film feeder with a simple configuration
Judgment of the film feed state, film and film feed
It is intended to prevent equipment damage.
You.

[0012]

According to the present invention, there is provided a film cartridge which feeds a film by rotating a film supply means and which indicates information about the film by an index which rotates integrally with the film supply means. In the camera, a film feed driving means for feeding a film, a rotation detecting means for detecting a rotation state of the index of the film cartridge, and a judgment for judging a film feeding state by the film feed driving means according to a detection result of the detecting means. Means, and
The reading of the index is required depending on the detection result of the rotation detecting means.
If the time is longer than the predetermined time, the determining means
Is judged to be abnormal, and the film feed
Control means for stopping the film feeding operation by the moving means.
In addition to the warning, it warns of abnormal film feed operation
A camera provided with a means . Further, the present invention provides a film feeder applied to a film cartridge which feeds a film by rotating a film supply means and indicates information about the film by an index which rotates integrally with the film supply means. Feed drive means, rotation detection means for detecting the rotation state of the index of the film cartridge, and determination means for determining the film feed state by the film feed drive means according to the detection result of the detection means , Detection of rotation detection means
Depending on the output result, the time required for reading the index is a predetermined time.
If the length of the film is longer than
Is determined to have occurred, and the film feed drive
In addition to providing control means for stopping the
A film feeder for a camera, characterized in that a warning means for warning an abnormal film feed operation is provided .

[0013]

[0014]

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

A film passing slit, one end of which is fixed to a supply spool, and a film wound around the supply spool, and coaxially arranged on the supply spool, and a radially outermost peripheral portion of the film is regulated by a regulating portion. Then, a pressing member that prevents the outermost periphery of the film from contacting a substantial point on the inner wall of the film cartridge, and deforming a part of the pressing member, continuously controlling the outermost peripheral portion of the film from the restriction in the radial direction of the pressing member. A release portion for releasing the film, and a guide portion for guiding the portion of the film released from the regulation to the film passage slit, and the outermost periphery of the film is expanded by the outermost periphery being spread due to loosening of the film caused by rotation of the supply spool in the film pushing direction. Between the film cartridge and the holding member without slipping. It is obtained by allowing the extrusion of Lum. Thereafter, due to the rotation of this kind of supply spool,
A film cartridge capable of discharging a film is 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, the supply spool of the cartridge is rotated by a fork after loading into the camera, the film is discharged, and the film is wound around the film take-up spool of the camera. The film can be extruded until the film is taken out, and then the film is fed by the 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 up in FIG. 1, and FIG. It is a gear train top view at the time of return. FIG.
FIG. 5 is a perspective view of a film cartridge according to an embodiment of the present invention, and FIG. 5 is a longitudinal sectional view of the cartridge chamber when a film is loaded in FIG.

In FIG. 1 to FIG. 5, reference numeral 1 denotes a film driving motor, which rotates forward when the film is wound (arrow B in FIG. 2).
Direction), and the reverse point (direction of arrow C in FIG. 3) when the film is rewound. Reference numeral 2 denotes a pinion gear fixed to the rotating shaft of the motor 1. Reference numeral 3 denotes a first sun gear which meshes with the pinion gear 2. Reference numeral 4 denotes a first planetary gear, which meshes with the first sun gear 3. 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 the first planetary gear 4
Is rotatably held, and the first planetary gear 4 is revolved around the first sun gear 3 as a rotation center by a first connection lever that rotates the first sun gear 3. is there. The first sun gear 3 and the first planetary gear 4
And the first connecting lever 5 constitute a known planetary gear mechanism. Reference numeral 6 denotes a spool gear that meshes with the first planetary gear 4 only when the film driving motor 1 rotates forward.
Reference numeral 7 denotes a film take-up spool which is fixed to the spool gear 6 and moves integrally.

Reference numeral 8 denotes a first idler gear that always meshes with the first sun gear 3, and 9 denotes a large gear portion 9a and a small gear portion 9b.
A first two-stage gear in which a large gear portion 9a meshes with the first idler gear 8; a second idler gear in mesh with a small gear portion 9b of the first two-stage gear 9; A third idler gear meshing with the idler gear 10 of the first embodiment is a second idler gear meshing with the third idler gear 11 of the second embodiment.
The sun gear 13 is a second planetary gear that meshes with the second sun gear 12. Reference numeral 14 denotes a third planetary gear, which meshes with the second sun gear, similarly to the second planetary gear 13. Numeral 15 connects the second sun gear 12, the second planetary gear 13, and the third planetary gear 14 with arms 15a and 15b, respectively, and holds each planetary gear rotatably while generating frictional force. The second connection lever is configured such that the second planetary gear 13 and the third planetary gear 14 revolve around the second sun gear 12 as a rotation center by rotation of the second sun gear 12. The second sun gear 1
The second, second and third planetary gears 13 and 14 and the second connecting lever 15 constitute a known planetary gear mechanism.

Reference numeral 16 denotes a fourth idler gear. When the film driving motor 1 rotates forward, the second planetary gear 13 is rotated by the left rotation of the second connecting lever 15 about the second sun gear 12. And the third planetary gear 14 does not mesh with the third planetary gear 14. When the motor 1 rotates in the reverse direction, the second connection lever 15 rotates rightward to mesh with the third planetary gear and does not mesh with the second planetary gear 13. Gear. 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 meshing with the idler 16 of the first embodiment has a large gear portion 18a and a small gear portion 18b, and has a large gear portion 18a.
Are meshed with the small gear 17b of the second two-stage gear 17, 19 is a fork gear meshed with the small gear portion 18b of the third two-stage gear 18, and 20 is integral with the fork gear 19. With this, a supply spool 33b in a later-described film cartridge 33 (refer to FIG. 5) is rotated by a fork that rotates, and the film 27 is pushed out and wound in the cartridge 33.

Reference numeral 22 denotes a cartridge chamber for storing a film cartridge. Also, in the film 27,
A magnetic storage unit (not shown) is formed, and a magnetic head (not shown) fixed to the film running surface of the camera
Various kinds of information relating to photographing are written (or read).

FIG. 4 is a perspective view of the cartridge. The cartridge 33 is the above-mentioned thrust type film cartridge, 33b is a film supply spool, and 33a is a film supply spool.
Is a bar code that encodes or encodes information about the film, for example, ISO sensitivity, the number of film frames, the film type, etc., and is represented by a bar code, and rotates integrally with the film supply spool. It is a disk.

FIG. 5 is a longitudinal sectional view of a cartridge chamber portion in a state where a cartridge is loaded. 33c, 33
Reference numeral d denotes a pressing member, and 49 denotes a photo reflector for optically reading out 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 circuit 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). Reference numeral 51 denotes 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 to perform positioning. Reference numeral 53 denotes a cartridge lid opening / closing switch, which detects that the cartridge lid 51 is closed by making the contact pieces 53a and 53b conductive. When the cartridge lid is closed, 51
The portion c can contact the contact piece 53a, and when the cartridge lid is closed, the portion 51c contacts the contact piece 53a, and
Make contact with When the cartridge lid is open, the contact pieces 53a and 53b are not in contact. Reference numeral 54 denotes a cartridge lid opening / closing lever, which is a dowel 55 of a main body (not shown).
56 and the elongated holes 54a and 54b are slidably fitted. 54c is a manual operation unit. 57 is a spring, one end of which is a main body, and the other end of which is a cartridge lid opening / closing lever 54.
, And urges the cartridge lid opening / closing lever 54 in the reverse direction of the arrow. Reference numeral 58 denotes a stopper provided on the main body (not shown) for regulating the position of the cartridge cover opening / closing lever 54 in the left direction. Also, the claws 54e and 51b
Are engaged with each other in the state shown in FIG. 5, and the cartridge lid 51 is held in the closed position.

In the above configuration, after the cartridge 33 is loaded in the cartridge chamber 22, when the film driving motor 1 (pinion gear 2) is rotated in the direction of the arrow as shown in FIG. ), The first sun gear 3 rotates clockwise, and the first planetary gear 4 is caused to rotate by the action of the first connecting lever 5.
Of the film driving motor 1 is transmitted to the spool gear 6 so that the film take-up spool 7 rotates clockwise. .

Further, the driving force is transmitted through a first two-stage gear 9, a second idler gear 10, and a third idler gear 8, which is another gear meshing with the first sun gear 3.
To the second sun gear 12 via the idler gear 11. Therefore, since the second sun gear rotates counterclockwise, the second planetary gear 13 and the third planetary gear 14 are driven by the second sun gear 1 by the action of the second connection lever 15.
2 revolves counterclockwise around the center of rotation,
Comes into mesh with the fourth idler gear 16. Thus, the driving force in the direction B of the film driving motor 1 is transmitted to the fourth idler gear 16 as a driving force in the counterclockwise direction, and further via the second two-stage gear 17 and the third two-stage gear 18. Transmitted to the fork gear 19,
The fork 20 rotates clockwise. Here, the gear ratio of the gear train is configured as follows. When the peripheral speed of the film take-up spool 7 is V ₁ and the fork 20
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 of the cartridge 33 by the clockwise rotation of the fork 20, the leading end of the film enters between the camera body and a pressure plate (not shown), and is eventually wound around the film spool 7. Thereafter, 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 according to the relationship V ₁ > V ₂ , the film spool 7 is moved via the film 27 to the fork gear 19 and the third two-stage gear 1.
8, the second two-stage gear 17 and the fourth idler gear 16 are transmitted in this order, and the rotation speed of the fourth idler gear 16 in the counterclockwise direction is faster than the clockwise rotation speed of the second planetary gear 13. However, at this time, the fourth idler gear 16 jumps off the second planetary gear 13, the engagement between the second planetary gear 13 and the fourth idler gear 16 is momentarily released, and the speed difference is absorbed. It is because it is constituted. Therefore, the film 27 when wound on the film spool 7, to it until the speed V ₂ of V ₁ of the speed (V _1> V _2), the speed is changed. In addition, 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 claw provided on the film take-up spool 7 or a means for pressing the film 27 provided on the camera body against the film take-up spool 7).

Thereafter, cueing and photographing of the first frame, film winding to the next frame, and the like are performed, which will be described later.

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

This operation will be described with reference to FIG. 3. When the film drive motor 1 is rotated in the direction of arrow C, the first connection lever 5 and the first planetary gear 4 rotate the first sun gear 3 around the rotation center. The first connection lever 5 revolves in the counterclockwise direction until the end 5a of the first connection lever 5 comes into contact with the stopper 28. Therefore, the engagement between the first planetary gear 4 and the spool gear 6 is released.

At this time, the second sun gear 12 rotates clockwise, whereby the second planetary gear 13 and the third planetary gear 14 are moved by the action of the second connecting lever 15. Revolve clockwise around 12 as the center of revolution.
The idler gear 16 and the second planetary gear 13 are disengaged from each other, and the fourth idler gear 16 and the third planetary gear 14 are engaged instead. Therefore, the fork gear 19 rotates counterclockwise, and the fork 20 causes the cartridge 3 to rotate.
3, the supply spool 33b 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. A control circuit 63 controls the operation of the entire camera, and has a built-in timer circuit. Reference numeral 64 denotes an AF / AE control circuit which includes a unit 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 photographic lens (not shown) and a luminance of the subject.
Reference numeral 0 denotes a magnetic head for writing or reading information on or from a magnetic recording portion of the film, and reference numeral 65 denotes a magnetic head drive circuit for driving the magnetic head 60. Reference numeral 66 denotes a motor control circuit that controls the rotation of a film feeding motor, which is a driving source for feeding the film. 67 denotes a light source that operates the photoreflector 49 and transmits information about the film written on the barcode disk 33a to a barcode. This is a photo-reflector control circuit for reading out with the rotation of the disk 33a. Reference numeral 68 turns ON when the cartridge 33 is loaded in the cartridge chamber. Reference numeral 69 denotes a release switch (not shown), which is turned on by manual operation to start release of the camera.

FIG. 7 shows a signal read from the barcode disk 33a by the photoreflector 49.
Is a plan view of the barcode disk 33a, and FIG.
The development of the bar code on the code disk 33a, and (3) shows the read signal.

FIG. 8 is a flowchart showing a sequence of a control circuit according to the first embodiment of the present invention. The operation of the camera will be described with reference to this flowchart.

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, and it is determined that the cartridge is loaded in the camera, and the flow proceeds to S102. S
At 102, a winding start signal is sent to the film feed control circuit 63, and the film feed control circuit 63 supplies power to the film driving motor 1 and drives it. At this time,
The film drive motor 1 rotates in the direction of arrow B as shown in FIG.
The extrusion from the film cartridge 33 of No. 7 is started. In S103, the photoreflector control circuit 64 is driven, and the information on the film written on the barcode disk is read out by the photoreflector 49. Also,
Here, when it is detected that the required time of the predetermined section of the signal measured and read by the timer is longer than the predetermined time, it is determined that an abnormality has occurred in the film feeding and the power supply to the film driving motor 1 is performed. Is stopped, and details will be described later. In S104, the film feed amount is calculated by counting a known means, for example, the perforation (not shown) of the film by 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 feeding amount based on the driving time of the motor, and the film feeding is continued until the first frame reaches this aperture portion. If 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 feed control circuit 63, and the AL (autoloading) of the film is stopped. In S106, it is determined whether or not the release button (not shown) has been pressed and the switch 66 has been turned on. If the determination is affirmative, the process proceeds to step 107, where the AF / AE control circuit measures the brightness of the subject, calculates distance information to the subject, and controls the focusing operation and the shutter of a photographic lens (not shown); A photographing operation such as an exposure operation on a film is performed (S107). Next, the number of releases, the film feed amount, and the like are compared with the number of frames of the film read in S103, and it is determined whether or not there are remaining frames (S10).
8). If there are remaining frames, the process proceeds to S109. If there is no remaining frame, the process proceeds to S113. In step S109, the film feed control circuit 63 is driven to start winding to the next frame. S1
At 10, the same operation as in S103 is performed. S111, S
If it is determined that one frame of the film has been wound in the same manner as in step 104, 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 via the film feed control circuit 63, the winding of the film is stopped, and then the process returns to S106. In order to start the film rewinding (winding 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 in S103 is performed. In S115, the process proceeds to S116 when it is detected that the film has been entangled in the cartridge by the same method as in S104.
Return to 14. Then, after the driving of the film driving motor 1 is stopped via the film feeding control circuit 63, the operation of the entire camera is stopped (S116).

FIG. 9 is a flowchart showing the details of S103 in FIG. 8, and the 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.
1 (S201). Here, it is determined whether or not the output signal is “rising” as indicated by a position A in the figure.
Next, the timers T ₁ and T built in the control circuit 61 are used.
₂ is reset (S202). Then, to start the timer T ₁ (S203). In S204, it is determined whether or not the output signal from the photoreflector 49 is “falling” as indicated by the position B in FIG. 7C. If “falling”, the process proceeds to step 205. And the timer T
₁ is stopped (S205). Here, the operation time of the timer T ₁ is set to t ₁ . Then, the timer is started T ₂ (S206). In S207, the photo reflector 4
It is determined whether or not the output signal from No. 9 is “rising” as in the position indicated by “C”.
Proceed to 08, stops the timer T ₂ (S20
8). Here, the operation time of the timer T ₂ and 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 time slightly longer than the time required for reading the widest bar code by the photoreflector 49 during normal film feeding (the time required for detecting from rising to falling). 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 .gtoreq.t, that is, when an abnormality occurs in the film feeding, the driving of the film driving motor 1 is stopped via the film feeding control device 63 (S21).
1) The process proceeds to S212. Then, a known warning means (LCD, LED,
(S212).

Steps S201 to S210 are repeated until a predetermined amount of film has been fed, and the barcodes on the barcode board 33a are sequentially read.

FIG. 10 is a flowchart showing a sequence of a control circuit according to the second embodiment of the present invention. This embodiment is the first
The difference from FIG. 9 of the embodiment is S301.
Steps that perform the same operation are given the same numbers.

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

FIG. 11 is a flowchart showing a sequence of a control circuit according to the third embodiment of the present invention. The difference from FIG. 9 of the first embodiment is that steps S401 to S404 are performed, and the other steps for performing the same operation are denoted by the same reference numerals.

In step S401, the type of the currently performed film feeding is determined.
If the film is being wound, the process proceeds to S403. If the film is being rewound, S403 is performed.
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, AL
Even if the film feeding speeds during medium winding, rewinding, and rewinding are different, a predetermined time corresponding to each of them can be set, so that more accurate film feeding abnormality can be detected.

Further, the information written on the film by rotating integrally with the film feed spool in the film cartridge is not particularly limited to the information written in a bar code. The present invention can also be applied to a case where a magnetic head is slid to read information by using a rotating body such as a disc or the like. ( Correspondence between the invention and the embodiment) In the above embodiment, the film feeding control circuit 63 is
Photoreflector control for film feed drive means of the invention
The circuit 64 is the rotation detecting means of the present invention, and the control circuit 61 is the
Each corresponds to a determination means of the invention.

[0044]

According to the present invention as described above,
The film is rotated by an index that rotates integrally with the film supply means.
Use a film cartridge that shows information about
And a camera applicable to the cartridge.
The film feeder allows quick filling with a simple configuration.
Can determine the feed status of the film,
This can prevent damage to the device.

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

Since no sprocket is used, the size of the camera can be reduced. This has the effect.

[Brief description of the drawings]

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.

FIG. 3 is a plan view of a gear train when the film is rewound in FIG. 1;

FIG. 4 is a perspective view of a film cartridge according to one embodiment of the present invention.

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

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

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

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

FIG. 9 is a flowchart illustrating an operation of a camera control circuit according to a second embodiment of the present invention.

FIG. 10 is a flowchart illustrating an operation of a control circuit of the camera according to the second embodiment of the present invention.

FIG. 11 is a flowchart illustrating an operation of a control circuit of a camera according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film feed motor 7 Film take-up spool 20 Fork 33 Cartridge 33a Barcode disk 33b Film supply spool 27 Film 49 Photoreflector 61 Control circuit 63 Film feed control circuit 64 Photoreflector control circuit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G03B 17/18 G03B 17/24

Claims (2)

(57) [Claims] 1. A film feeder for feeding a film by feeding a film by rotating a film feeder and using a film cartridge indicating information about the film by an index which rotates integrally with the film feeder. a drive means, a rotation detecting means for detecting a rotational state of the index of the film cartridge, and determining means for feeding condition of the film by the film feed drive means in accordance with a detection result of said detecting means, said rotating In the detection result of the detection means
Therefore, the time required for reading the index is longer than a predetermined time.
In the case, the judgment means has found an abnormality in the film
Determined that the film has been fed by the film feed drive unit.
A control means to stop the operation is provided,
A camera comprising a warning means for warning an abnormal operation of the camera. 2. A film feeder for feeding a film in a film feeder applied to a film cartridge which feeds a film by rotating a film supply means and indicates information about the film by an index which rotates integrally with the film supply means. a drive means, a rotation detecting means for detecting a rotational state of the index of the film cartridge, and determining means for feeding condition of the film by the film feed drive means in accordance with a detection result of said detecting means, said rotating In the detection result of the detection means
Therefore, the time required for reading the index is longer than a predetermined time.
In the case, the judgment means has found an abnormality in the film
Determined that the film has been fed by the film feed drive unit.
A control means to stop the operation is provided,
A film feeder for a camera, comprising a warning means for warning an abnormality in the operation of the camera.