JP2878864B2 - Camera and cartridge index setting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention comprises a bar code indicating the predetermined information by rotating pattern in conjunction with the rotation of the film supply means of the film cartridge, the film feed
Camera film cartridge having a index indicating the use status of the film by the rotational stop position in conjunction with the rotation of the means can <br/> applicable,及beauty, to an improvement of the cartridges indicator setting device.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 55-22799 discloses a camera in which information about a film is recorded as magnetic information on a disk which moves integrally with the feeding of the film and the information is read when the film is supplied. Has been proposed.
Also, in Japanese Utility Model Laid-Open No. 58-183695, the cassette tape
There has been proposed a tape tape winding reel in which information on the cassette tape is recorded by a bar code.
It is also possible to record the above-mentioned film information on the disk with a bar code in this way. The film information can be automatically set by reading the image using an optical means such as a photo interrupter at the start of feeding the film.

Japanese Patent Application Laid-Open No. HEI 2-114248 discloses a film cartridge for displaying whether a film is unused or used by a display means which moves in conjunction with the rotation of a film supply spool in the film cartridge. It has been proposed.

[0004]

However, the disk rotates integrally with the film supply spool in the film cartridge, and a disk on which information relating to the film is encoded and recorded, and the disk rotates integrally with the film supply spool. In the case where a camera using a film cartridge having a display means for displaying whether the film is unused or used by its rotation position is constituted, in addition to reading means for reading information recorded on the disc, Detecting the rotational position of a camera fork engaged with the film supply spool in order to set the film supply spool in the film cartridge to a position where the display means indicates that the film has been used. A problem that rotation position detection means must be provided, resulting in an increase in size and cost. There was a title.

[0005] The present invention has been made in view of the above circumstances, the bar indicating the predetermined information by rotating pattern in conjunction with the rotation of the film supply means of the film cartridge
The use state of the film without adding a special configuration to a film cartridge provided with a code and an index indicating the use state of the film by a stop position which rotates in conjunction with the rotation of the film supply means. It is an object of the present invention to provide a camera and a cartridge index setting device which can set the index at a position indicated by.

[0006]

Means for Solving the Problems In order to achieve the above object, the present invention provides a film supply device for a film cartridge.
And a bar code indicating the predetermined information by rotating pattern in conjunction with the rotation of the unit, with the rotation of the film supply means
Finger indicating the use status of the film by the stop position rotated by
A camera capable of applying a film cartridge and a target, said when it came to the position shown and a driving means for driving said film supply means, the use state of the indicator film with read information of the pattern of the bar code a detecting means provided to detect a predetermined pattern of a bar code, a camera and a control means for stopping said drive means in response to the detecting means for detecting said predetermined pattern of said bar code Is what you do. Further, the present invention includes a bar code indicating the predetermined information by rotating pattern in conjunction with the rotation of the film supply means of the film cartridge, the rotation of the film supply means
In Ca <br/> cartridges indicator setting apparatus capable of applying a film cartridge with a index indicating the use status of the film by the stop position is rotated in conjunction with each other, the film supply hand
Driving means for driving the stage, and a detection means for the index is provided so as to be able to detect a predetermined pattern of the bar code when it came to the position showing the use condition of the film along with reading the pattern information of the bar code Responding that the detecting means detects the predetermined pattern of the barcode.
In response, the present invention provides a cartridge index setting device having control means for stopping the driving means.

[0007]

According to the above configuration, according to the present invention, the stop position of the index can be set by detecting means for reading the information of the bar code pattern of the film cartridge.

[0008]

1 to 5 relate to a first embodiment of the present invention, and FIGS. 1 and 2 are a perspective view and a plan view of a film cartridge used in the present embodiment.

1 is a film cartridge, 2 is a supply spool for extruding a film from the inside of the film cartridge 1 to the outside, 2a is a spline engaging with a fork of a camera, 2b is an index, 3 Is a bar code disk which rotates integrally with the supply spool 2, and records information on the film, such as the number of film frames, ISO sensitivity, and whether the film is negative or positive. Have been.

The exterior of the film cartridge 1 includes:
As shown in FIGS. 1 and 2, there is a display section 1 a for “unexposed” and “exposed”, and the index 2 b indicates “unexposed” or “exposed” on the display section 1 a depending on the rotation position of the supply spool 2. Is displayed to the user as to whether the film cartridge 1 is unused or used. In other words, the index 2b is set to the "unexposed" position before the film is used, and the camera controls the fork stop position after the film is rewound after the film is used. As shown, the index 2b is aligned with the “exposed” position. Conventionally, means such as a switch and an encoder for detecting the rotational position of the fork have been required.

On the bar code disk 3, a reference signal section 3b indicating the start of information about the film is recorded. This is a method in which if the black display of, for example, 10 times or more of the adjacent bar code portion 3a is displayed, it is regarded as the reference signal portion 3b, and the width of the bar code portion 3a is reduced. Assuming that t1 and the width of the reference signal portion 3b are t2, "10t1 <t2"
Is in a relationship.

The film cartridge 1 has a bar code.
The index 2b and the reference signal portion 3 of the barcode disk 3 are independent of the contents of the information on the film recorded on the disk 3.
The angle α of b with the left end surface is constant as shown in FIG.

Here, the above-described film cartridge 1 has the following structure proposed in US Pat. No. 4,834,306.

A film passing slit 1b and one end of which is fixed to the supply spool 2 and which is wound around the supply spool 2 (to be described later with reference to FIG. 3) are arranged coaxially with the supply spool 2. The outermost periphery of the film is restricted by the restricting portion in the radial direction.
A pressing member (to be described later with reference to FIG. 3) for preventing the inner wall of the film from being substantially contacted, and a part of the pressing member is deformed to continuously release the outermost peripheral portion of the film from the restriction in the radial direction of the pressing member. And a guide member (not shown) for guiding the portion of the film released from the regulation to the film passage slit, and the film winding caused by the rotation of the supply spool 2 in the film pushing direction. Due to the expansion of the outermost periphery due to loosening, there is no slip between the outer periphery of the film and the pressing member, and a driving force in the extrusion direction is given to the film,
The film can be extruded from the film cartridge 1. Hereinafter, such a film cartridge capable of discharging the film by rotation of the supply spool will be referred to as an extrusion type (thrust type) film cartridge.

If the extrusion type film cartridge 1 is used, the fork of the camera (FIG.
The supply spool 2 in the film cartridge 1 is rotated to eject the film and extrude the film until it is wound around a film take-up spool (not shown) of the camera. It is possible to adopt a configuration in which a film is supplied by a take-up spool. Japanese Patent Laid-Open No. 2-67535 discloses a film feeding system having such a configuration.

FIG. 3 is a longitudinal sectional view showing a state in which the film cartridge 1 is loaded in the cartridge chamber of the camera.

In FIG. 3, reference numerals 4 and 5 denote a pressing member made of a flexible material, and reference numeral 6 denotes a photo reflector.
When the disk 3 rotates, the information on the film written on the disk 3 is read out optically, and is attached to the inner wall of the cartridge chamber 7. Reference numeral 8 denotes a flexible printed circuit board on which the photo reflector 6 is mounted, and a signal for driving the photo reflector 6 and the photo reflector 6
Is exchanged with a control circuit also described later via a photoreflector control circuit described later. Reference numeral 9 denotes a cartridge lid, which is rotatably attached to the camera body at a shaft portion 9a. Reference numeral 10 denotes a cartridge pressing member made of an elastic member, which is fixed to the cartridge lid 9 and presses the film cartridge 1 upward when the cartridge lid 9 is closed as shown in FIG. Is what you do.

Reference numeral 11 denotes a cartridge lid opening / closing switch, which is turned on when the contact pieces 11a and 11b become conductive.
Is closed by a control circuit described later. The portion 9c of the cartridge lid 9 can be brought into contact with the contact piece 11a, and when the cartridge lid 9 is closed, this 9c portion becomes the contact piece 11a.
And contact with 11b. When the cartridge lid 9 is open, the contact pieces 11 and 11b are not in contact. 1
Reference numeral 2 denotes a cartridge lid opening / closing lever which is slidable by dowels 13 and 14 from the camera body and elongated holes 12a and 12b. 12c is a manual operation unit. A spring 15 has one end attached to the camera body and the other end attached to the cartridge lid opening / closing lever 12, and biases the cartridge lid opening / closing lever 12 in a direction opposite to the arrow. Reference numeral 16 denotes a stopper provided on the camera body, and a cartridge lid opening / closing lever.
The left position is regulated. Also, the claws 12e and 9
The part b is engageable, and the state of FIG. 3 is engaged with each other, and holds the cartridge lid 9 in the closed position.

Reference numeral 17 denotes a fork gear connected to a known film feed gear train. Reference numeral 18 rotates integrally with the fork gear 17 and engages with the spline 2a of the supply spool 2 of the film cartridge 1. This is a fork of the camera described above. 19 is a film.

The photo reflector 6 shown in FIG. 3 is located at a position shown by a broken line in FIG.
Detects the left end face of the reference signal section 3b, the rotation of the film feed motor or fork 18 described later is immediately stopped, and the index 2b stops at the position indicating "exposed". It is configured as follows.

FIG. 4 is a block diagram of a camera showing a first embodiment of the present invention.

In FIG. 4, reference numeral 31 denotes a control circuit for controlling the operation of the entire camera, and 32 includes a distance measuring circuit and a photometric circuit for measuring the distance to the subject. An AF / AE control circuit for opening and closing a shutter for controlling exposure to the film 19 according to the luminance;
Reference numeral 33 denotes a film feed control circuit for controlling the rotation of a film feed motor 34, and 35 operates the photoreflector 6 so that the bar code is moved with the rotation of the bar code disk 3. Is a photo-reflector control circuit for reading out information about the film recorded by the above. Reference numeral 36 denotes the cartridge lid opening / closing switch 11, which is turned on when the film cartridge 1 is loaded in the cartridge chamber 7.
A cartridge detection switch 37 connected in series with the release switch 37 is turned on by manual operation, and the release of the camera starts.

Next, the operation of the control circuit 31 will be described with reference to the flowchart shown in FIG. "Step 100" A film car is placed in the cartridge room 7.
When the cartridge 1 is loaded and the cartridge lid 9 is closed, the cartridge lid opening / closing switch 11 and the
Both the cartridge detection switches 36 are turned on, but the control circuit 31 determines that the camera is loaded with the film cartridge 1 by turning on these switches, and then proceeds to step 10.
Proceed to 1. [Step 101] The internal timer is reset. "Step 102" Since the film cartridge 1 is loaded, a winding start signal is sent to the film feed control circuit 33 here. Thus, the film feeding motor 1
Rotates the supply spool 2 by the fork 18 through the gear train as described above, and
Extrusion from the cartridge 1 is started. "Step 103" The timer circuit is started.

In step 102, the drive of the film feed control circuit 33 is started, and the film feed motor 34 is rotated, so that the supply spool 2 and the bar of the film cartridge 1 are rotated. The code disk 3 also rotates, but the rising characteristics of the film feed motor 34, the inertia of the gear train, the backlash of the gear train, and the spline 2a of the fork 18 and the supply spool 2. It is assumed that a time Ta is required after the winding start signal is sent until the bar code disk 3 is rotated in a stable steady state by the engagement play or the like. [Step 104] The internal timer determines whether or not a predetermined time T1 (T1 ≧ Ta) has elapsed, and if it has elapsed, the process proceeds to Step 105. If not, the process returns to Step 102, and the film feeding is performed. Continue as it is. [Step 105] The internal timer is stopped. "Step 106" At this point, since the rotation of the bar code disk 3 is stable, the photoreflector control circuit 3
5, the information about the film 19 written on the barcode disk 3 by the photoreflector 6, for example, the film sensitivity, the specified number of frames of the film, etc., is read. "Step 107" Here, the film feeding amount is calculated by counting the perforations (not shown) of the film 19 by a known means, for example, a photo-interrupter (not shown), or a roll which is pressed against the film 19 is pressed. The film feed amount is calculated by counting the number of rotations of the roller with a pulse plate or the like, or the film feed amount is calculated based on the drive time of the film feed motor 34, for example. It is determined whether the first frame of No. 19 has arrived, and the film feeding is continued until the first frame reaches this portion. If it is determined that the first frame has reached the aperture, step 1
Proceed to 08. "Step 108" Here, the film feed control circuit 3
The drive of the film feed motor 34 is stopped via 3 and the winding of the film 19 is stopped.

When the above operation is completed, the flow proceeds to step 109. "Step 109" Here, it is determined whether or not the first stroke of the release button (not shown) has been performed and the switch 37 has been turned on, and the process proceeds to step 110 by determining that the switch 37 has been turned on. [Step 110] The AF / AE control circuit 32 is operated to measure the brightness of the subject, calculate distance information to the subject (distance measurement information), and focus an unillustrated photographing lens based on the information. An operation and a photographing operation such as an exposure operation by shutter control are performed. [Step 111] A comparison is made between the number of releases, the film feed amount, etc., and the specified number of frames of the film read in step 106, and it is determined whether there are any remaining frames.
As a result, if there are no remaining pieces, the process proceeds to step 115,
If so, proceed to step 112. [Step 112] The film feed control circuit 33 is driven to start winding the next frame through the film feed motor 34. "Step 113" For example, a method of counting the performance of the film 19 with a photo coupler (not shown),
Whether or not the film 19 has been wound up by one frame is determined by the method of detecting the feed amount of the film 19 by counting the number of rotations of the roller pressed against the film. When one frame is wound up, the routine proceeds to step 114. "Step 114" Here, the film feed control circuit 3
The drive of the film feeding motor 34 is stopped via the step 3, the winding of the film 19 is stopped, and the process returns to the step 109.

In the step 111, the film 19
If it is determined that there are no remaining frames, the process proceeds to step 115 as described above. "Step 115" In order to start the rewinding of the film 19 (winding into the film cartridge 1), the film feeding motor 34 is driven in the rewinding direction via the film feeding control circuit 33. "Step 116" The film 19 is rewound into the film cartridge 1, and it is known that the film 19 has been rewound into the film cartridge 1 by a known means, for example, not shown by the user. If a signal is input from the input means, a predetermined time has elapsed since the film 19 was rewound, or the position is detected by the above-described method of detecting the position of the film by the photocoupler, step 1 is performed.
Proceed to 17. "Step 117" The photoreflector control circuit 33 is driven, and it is determined whether or not the photoreflector 6 detects the left end face of the reference signal section 3b on the bar code disk 3 in FIG. Then, when the left end face of the reference signal section 3b is detected, the process proceeds to step 118. "Step 118" The drive of the film feed motor 34 is stopped via the film feed control circuit 33, and the operation of the entire camera is stopped. At this time, the index 2b of the supply spool 2
Is stopped at a location where the position indicates “exposed”.

Thus, a series of operations is completed.

FIG. 6 is a flowchart showing the operation of the second embodiment of the present invention. The circuit configuration and the like are the same as those of the first embodiment.

The film cartridge 1 in this embodiment has an index 2b and a bar code disk 3 irrespective of the contents of information about the film recorded on the bar code disk 3.
The angle β of the reference signal portion 3b with the right end face is constant as shown in FIG. In addition, at the position where the photoreflector 6 detects the right end face of the reference signal section 3b, the index 2b is configured to be a position indicating "midway rewind". That is, the film cartridge 1 used in this embodiment is
Assuming that the angle between “rewinding in the middle” and “exposed” is γ, γ is configured to be equal to (β−α).

In the first embodiment, when the photographing has been completed up to the last frame (prescribed frame) of the film 19, and the film is rewound, the index 2b is stopped at the "exposed" position.
Although the user was informed that the film cartridge 1 had been photographed for all frames, the method of using the film was to photograph the frames in the middle, rewind the film once, and then, for example, adjust the film sensitivity. In some cases, a different film is loaded and shooting is performed. In such a case, in the first embodiment, there is an inconvenience that the index 2b is stopped at the “exposed” position even if the image has been captured halfway. In the second embodiment, it is intended to provide a camera which can cope with such use of the film.

The operation will be described below with reference to FIG.
Note that parts performing the same operations as in FIG. 5 are denoted by the same step numbers, and here only the main parts are shown. [Step 110] The AF / AE control circuit 32 is operated to measure the brightness of the subject, calculate distance information to the subject (distance measurement information), and focus an unillustrated photographing lens based on the information. An operation and a photographing operation such as an exposure operation by shutter control are performed. "Step 201" It is determined whether or not a pre-wind switch (not shown) has been turned on. If the switch has been turned on, the process proceeds to step 115 to rewind the film halfway. Also OF
If F, go to step 111. [Step 111] A comparison is made between the number of releases, the film feed amount, etc., and the specified number of frames of the film read in step 106, and it is determined whether there are any remaining frames.
As a result, if there are no remaining pieces, the process proceeds to step 115,
If so, proceed to step 112.

If it is determined in step 201 that the prewind switch has been turned on, or if it is determined in step 111 that there is no remaining frame on the film 19, the process proceeds to step 115 as described above. "Step 115" In order to start the rewinding of the film 19 (winding into the film cartridge 1), the film feeding motor 34 is driven via the film feeding control circuit 33 in the rewinding direction. "Step 116" The film 19 is rewound into the film cartridge 1, and it is known that the film 19 has been rewound into the film cartridge 1 by a known means, for example, not shown by the user. If a signal is input from the input means, a predetermined time has elapsed before the film 19 is rewound, or the position is detected by the above-described method of detecting the position of the film by the photocoupler, step 2 is executed.
Go to 02. "Step 202" It is determined whether or not a pre-wind switch (not shown) has been turned on, and if it has been turned on, the process proceeds to step 203. If it is OFF, the process proceeds to step 117. "Step 117" The photoreflector control circuit 35 is driven, and it is determined whether or not the photoreflector 6 detects the left end face of the reference signal portion 3b on the bar code disk 3 in FIG. Then, when the left end face of the reference signal section 3b is detected, the process proceeds to step 118. "Step 118" The drive of the film feed motor 34 is stopped via the film feed control circuit 33, and the operation of the entire camera is stopped. At this time, the index 2b of the supply spool 2
Is stopped at a location where the position indicates “exposed”.

If it is determined in step 202 that the prewind switch is ON, the process proceeds to step 203 as described above. "Step 203" The photoreflector control circuit 35 is driven, and it is determined whether or not the photoreflector 6 has detected the left end face of the reference signal portion 3b on the barcode disk 3 in FIG. Then, when the left end face of the reference signal section 3b is detected, the process proceeds to step 204. "Step 204" The film feed motor 34 is driven in the film winding direction via the film feed control circuit 33. "Step 205" The photoreflector control circuit 35 is driven, and it is determined whether or not the right end face of the reference signal portion 3b on the barcode disk 3 is detected by the photoreflector 6 (see FIG. 7). Then, when the right end face of the reference signal section 3b is detected, the process proceeds to step 206. [Step 206] The driving of the film feeding motor 34 via the film feeding control circuit 33 is stopped, and the operation of the entire camera is stopped. At this time, the index 2b of the supply spool 2
Is stopped at such a position as to indicate "midway rewind" as shown in FIG.

Thus, a series of operations is completed.

By doing so, even if it is indicated that the same film has been used, it is possible to easily know whether all the frames have been used or have been used halfway.

FIG. 8 is a longitudinal sectional view of a camera showing the structure of a main part in a third embodiment of the present invention. The same parts as those in FIG. 3 are denoted by the same reference numerals.

In this embodiment, the bar code disk 3 in which the information on the film 19 is recorded not by bar code but by magnetic means is slid on the bar code disk 3. There is a magnetic head 19 as a means for reading magnetic information recorded in the magnetic head. Reference numeral 20 denotes a flexible printed board on which the magnetic head 19 is mounted, and is connected to the control circuit 31 shown in FIG.

According to each of the above embodiments, when the film 19 is completely rewound, the index 2b provided on the film cartridge 1 is displayed on the barcode disk 3 as "exposed". In order to stop at the position (by detecting the left end face of the reference signal section 3b), a switch or encoder for detecting the rotational position of the fork is conventionally used to notify the "exposed" position. Although a means is required, such a means becomes unnecessary, so that the cost of the camera can be reduced.

When the film 19 is rewound halfway, the index 2b provided on the film cartridge 1
Is configured to stop at the "midway rewind" position displayed on the barcode disk 3 (by detecting the right end face of the reference signal portion 3b), so that a film cartridge containing a film completely photographed to the end is stored. , Or a film cartridge containing a film that has been photographed halfway and still has unexposed frames remaining. (Correspondence between the invention and the embodiment) In the above embodiment, the fork gear 17, the fork 18, the film feeding control circuit 3
3. The film feeding motor 34 is a driving means of the present invention,
The photoreflector 6 serves as the detecting means of the present invention and the control circuit 3
1 corresponds to the control means of the present invention.

[0040]

As described in the foregoing, shown according to the present invention, the predetermined information by rotating pattern in conjunction with the rotation of the film supply means of the film cartridge barcode
And a film cartridge having an index indicating the use state of the film by a stop position which is rotated in conjunction with the rotation of the film supply means, without adding a special configuration. The present invention can provide a camera and a cartridge index setting device that can set the barcode at a position indicating a use state and can achieve downsizing and cost reduction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a film cartridge used in a first embodiment of the present invention.

FIG. 2 is a plan view of the film cartridge of FIG.

FIG. 3 is a longitudinal sectional view of a camera showing a main part configuration according to the first embodiment of the present invention.

FIG. 4 is a circuit block diagram showing a first embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the control circuit of FIG. 4;

FIG. 6 is a flowchart showing an operation of only a main part in a second embodiment of the present invention.

FIG. 7 is a plan view showing a film cartridge used in a second embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a camera showing a main part configuration according to a third embodiment of the present invention.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Film cartridge 1a Display part 2 Supply spool 2b Index 3 Bar code disk 6 Photoreflector 20 Magnetic head 31 Control circuit 33 Film feed control circuit 34 Film feed motor 35 Photoreflector control circuit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G03B 17/00 G03B 7/24

Claims (2)

(57) [Claims] 1. A film cartridge film supply hand
And a bar code indicating the predetermined information by pattern rotates in conjunction with rotation of the stage, in conjunction with the rotation of the film supply means
An indicator that shows the state of use of the film depending on the stop position
In a camera to which a film cartridge comprising: a driving unit for driving the film supply unit ,
Read the bar code pattern information and
In response to index and detecting means provided to detect the predetermined pattern of the bar code when it came to the position indicating the use status of the film, which is detecting means for detecting said predetermined pattern of said bar code And control means for stopping the driving means. 2. A film cartridge film supply hand
And a bar code indicating the predetermined information by pattern rotates in conjunction with rotation of the stage, in conjunction with the rotation of the film supply means
A cartridge index setting device that can apply a film cartridge provided with an index indicating a use state of a film by a stop position and a driving position for driving the film supply unit; and a pattern of the bar code. wherein the predetermined pattern of the index and a detecting means provided to detect the predetermined pattern of the bar code when it came to the position indicating the use status of the film, said detection means said bar code with reading of information And a control means for stopping the driving means in response to the detection of the cartridge index.