JPH05119379A - Camera - Google Patents

Abstract

PURPOSE:To prevent an information read means from getting out of order and to prevent the misoperation of the means. CONSTITUTION:This camera is provided with the information read means 16 which optically reads a bar code recorded on a bar code disk 2, a cover 6 for closing a cartridge chamber 3a where a film cartridge 1 is housed, a switching means 10 whose state is changed by interlocking with the closing action of the cover 6, and a driving start indication means which drives the means 16 by discriminating that the state of the means 10 is changed.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention has a bar code disk which rotates integrally with a feed spool in a film cartridge and in which information about the film is recorded by a bar code. The present invention relates to a camera using a film cartridge.

[0002]

2. Description of the Related Art Conventionally, a film cartridge containing all the films is used, and the film is pushed out of the film cartridge by the rotation of a fork. -The one to be housed in the ridge is disclosed in U.S. Pat. No. 4,841,319.
Further, by using the film cartridge as described above in which information about the film (film sensitivity, specified number of frames, etc.) is recorded as magnetic information on a disk that moves integrally with the feeding of the film, the film is fed. A camera designed to read this information from the disk when it is sent is disclosed in JP-A-55-22799.
It is proposed in the issue. In addition, the actual development Sho 58-18369
In No. 5, the tape winding reel of the cassette tape has a bar.
It has been proposed that information about the cassette tape is recorded on a code and the information is read during the rotation of the tape winding reel.

Therefore, the applicant of the present application uses a film cartridge in which the above-mentioned film information is recorded on the disk by a bar code instead of magnetic information, and the film information is recorded by the bar code when the film is fed. -The company has already filed (unpublished) a camera that can be optically read by a photo reflector or the like.

[0004]

However, in the above-mentioned camera, since the optical information reading means is used to read the bar code, there are the following problems. Was there.

1) As the optical information reading means, a photoreflector is usually used as described above, and infrared light is emitted from this light projecting portion and reflected by a reflector (bar code portion). The light receiving section receives the signal and outputs a signal. However, when the strong light such as the sun directly enters the light receiving section, the intensity of the light is so strong that a malfunction may occur or the element may sometimes be broken.

2) Since the bar code reads a wide portion and a narrow portion, it is necessary to suppress variations in the speed of film feeding during reading as much as possible. However, even if the film cartridge is loaded in the cartridge chamber, if the reading operation is started before the cartridge loading lid is closed, this instruction is given. Pressing or tampering with causes the load to change and the film feed speed to fluctuate, resulting in incorrect reading of information.

It is an object of the present invention to provide a camera capable of preventing the information reading means from malfunctioning or malfunctioning.

[0008]

SUMMARY OF THE INVENTION The present invention is an information reading means for optically reading a bar code recorded on a bar code disk and a cartridge chamber for accommodating a film cartridge. A lid for closing the door, a switch means for changing the state in association with the closing operation of the lid, and a drive start instruction means for driving the information reading means by discriminating that the state of the switch means has changed. ing.

[0009]

The drive start instructing means starts the drive of the information reading means for the first time by determining that the state of the switch means, which is changed in conjunction with the closing operation of the lid for closing the cartridge chamber, is changed. To do. Therefore, at the time of reading the bar code, external light is not incident on the information reading means for performing the reading operation, and the film cartridge is not touched.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

2 to 5 are views relating to the first embodiment of the present invention. FIG. 2 is a perspective view of a film cartridge used in the present invention, FIG. 3 is a perspective view of a camera, and FIG. FIG. 5 is a bottom view of the camera, and FIG. 5 is a vertical sectional view of the camera when the film cartridge shown in FIG. 2 is loaded in the camera.

In these figures, reference numeral 1 denotes an engaging portion 1a which engages with an engaging portion 13a of a fork 13 of the camera shown in FIG.
2 is a bar code disk on which a bar code in which film information such as film sensitivity and the number of specified film frames is encoded is printed.
The code disk 2 is a film cartridge 1 as shown in FIG.
It is constructed so as to rotate integrally with the supply spool 1b. Reference numeral 3 is a camera body, 4 is a release button, 5 is a liquid crystal display having a film sensitivity display section 5a for displaying film sensitivity, and a number display section 5b for displaying the specified number of films and the number of shots.

Reference numeral 6 closes the cartridge chamber 3a, and outside light enters the film cartridge 1 into the film cartridge 1c into which it is loaded by a malt plane 7a described later.
A cartridge loading lid for preventing the film cartridge 1 from being touched from the outside, and a transparent portion 7 formed integrally with the cartridge loading lid 6 and printed on the film cartridge 1. It is for viewing the seal such as film sensitivity. 7a is the film 1c where light from the transparent portion 7
The above-mentioned malt plane attached to the cartridge loading lid 7 so as not to enter the lock lever-1 and the lock lever-1 which will be described later.
It is an opening / closing knob for opening and closing the cartridge loading lid fixed to 1. Reference numeral 9 is a shaft for rotatably supporting the cartridge loading lid 6.

Reference numeral 10 denotes a loading lid switch which is turned on and off by the protruding portion 6b of the cartridge loading lid 6, which is turned on when the cartridge loading lid 6 is opened and turned off when it is closed. In the state of FIG. 5, since the film cartridge loading lid 6 is closed, it is in the OFF state.

Numeral 11 is slidably supported by two pins 3c and 3d protruding from the camera body 3, and a spring 12
The lock lever is always biased in the right-hand direction in FIG. 5, and has a lock portion 11a for locking the claw portion 6a of the cartridge loading lid 6. Further, the urging of the lock lever 11 to the right by the spring 12 is prevented by the stopper 3
regulated by b. When the cartridge loading lid 6 is closed, the lock portion 11a is moved in the direction of the arrow by the engaging portion 6a, and then the lock portion 11a is moved to the right according to the bias of the spring 12, as shown in FIG. Lock the loading lid 6.

Reference numeral 13 is a fork having an engaging portion 13a which engages with the supply spool 1a of the film cartridge 1 as described above, and 14 is a decelerating output of a feeding motor (not shown) which will be described later. A gear engaged with the gear portion 13a of the fork 13, which is transmitted through the gear train, 15 is a printed circuit board, 1
Reference numeral 6 is a photo reflector for reading the bar code from the bar code disk 3.

FIG. 1 is a block diagram showing the schematic arrangement of a camera according to an embodiment of the present invention.

In FIG. 1, 100 is a battery serving as a power source, 101 is a control circuit including a microcomputer for controlling various operations of the camera, and 102 is an AE / AF.
A drive circuit, 103 is a shutter drive circuit that opens and closes the shutter, and 104 is a feeding mode for feeding the film 1c.
A motor drive circuit that drives the motor 208, and a photoreflector drive circuit 105 that drives the photoreflector 16.

FIG. 6 is a flow chart showing the operation of the control circuit 101. "Step 201" It is determined from the state of the loading lid switch 10 whether the cartridge loading lid 6 is opened to load the film cartridge 1 into the camera. As a result, when it is determined that the loading lid switch 10 is ON, that is, the cartridge loading lid 6 is opened, step 202
Go to. "Step 202" Here, film cartridge 1
Is loaded into the camera and whether the cartridge loading lid 6 is closed is determined from the state of the loading lid switch 10. As a result, if the loading lid switch 10 remains ON, the process returns to step 201. When it is determined that the loading lid switch 10 is turned off, that is, the cartridge loading lid 6 is closed as shown in FIG. 5, the process proceeds to step 203. "Step 203" Photoreflector drive circuit 105
The photo-reflector 16 is driven via the, and projection of infrared light from this light projecting unit is started. "Step 204" The feeding motor 108 is driven through the motor drive circuit 104. As a result, the supply spool 1b in the film cartridge 1 starts to rotate via the gear 14 and the fork gear 13, and the film 1c is extruded from the film cartridge 1 and the film winding spool of the camera. The take-up operation to the start. That is, the publicly known auto-reading is started. At this time, the bar code disk 2 on which the bar code is printed also starts rotating as the supply spool 1b rotates. "Step 205" Bar code reading is started from the bar code disk 2 rotating integrally with the supply spool 1b. That is, the reflected light of the infrared light projected from the light projecting portion of the photo reflector 16 at the bar code portion is received by the light receiving portion, and an analog signal corresponding to the black and white (bright and dark) pattern is output. The control circuit 101, which is output from the photo reflector 16 and receives this signal via the photo reflector drive circuit 105, compares it with a predetermined threshold level and outputs "0".
Converted to a digital signal of "1", and this is an internal RAM
Store as film information. "Step 206" It is determined whether or not the reading of the bar code has been completed, and if it is not completed, the procedure returns to step 205 and the same operation is repeated, and if it is determined that the reading is completed, the procedure proceeds to step 207. Whether or not the reading of the bar code is completed is determined by, for example, the bar code.
It is possible to consider a method of performing comparison with a predetermined time, which is longer than the time required for the disk 2 to rotate once. "Step 207" In step 106, the bar code
Since it can be determined that the reading of the image has been completed, the driving of the photo reflector 16 is stopped here via the photo reflector driving circuit 105. [Step 208] Whether or not a predetermined number of films have been fed (usually detected by detecting perforation included in the film 1c), that is, the first frame of photographing is set at the aperture position of the camera. If it is determined whether or not it has come, it is determined that the auto-reading operation is completed, and the process proceeds to step 209. "Step 209" The driving of the feeding motor 108 is stopped via the motor driving circuit 104. "Step 210" Here, the first release button 4
A series of photographing operations such as photometry and distance measurement operation associated with the stroke and shutter opening / closing operation associated with the second stroke are performed.

FIG. 7 is a vertical sectional view of a camera showing the structure of the main part of the second embodiment of the present invention. The parts having the same functions as those of the first embodiment are designated by the same reference numerals.

In this embodiment, the O of the loading lid switch 10 is
N and OFF are not performed by the cartridge loading lid 6, but a lock lever that locks the cartridge loading lid 6.
11 (slightly different in shape from the lock lever 11 in the first embodiment).

FIG. 7 shows a state in which the cartridge loading lid 6 is closed. From this state, the opening / closing knob 8 is moved in the direction of the arrow to move the lock lever 11 in the same direction (against the bias of the spring 12). ), The loading lid switch 10 is turned on.
The lever 17 has two pins 3 protruding from the camera body 3.
Although it is slidably supported by e and 3f and is constantly urged in the upward direction of FIG. 7 by the spring 18, in the state of FIG. 7, it is in contact with the claw portion 6a of the cartridge loading lid 6 and at this position. It has stopped. However, due to the movement of the lock lever 11, the lock portion 11a and the claw portion 6 of the cartridge loading lid 6 are moved.
When a is disengaged, the lever 17 moves upward in accordance with the urging force of the spring 18, and the cartridge loading lid 6 is opened.

In this state, when the open / close knob 8 is released,
Therefore, the lock lever 11 tries to move in the direction opposite to the arrow because of the biasing force of the spring 12, but since the lever 17 moves upward in the drawing, the notch 11 is formed in the convex portion 17a.
b comes into contact with it and is in a state of being stopped substantially at this position. Therefore, the ON state of the loading lid switch 10 is maintained, the control circuit 101 determines that the cartridge loading lid 6 is still open, and the photo reflector 16 is not driven in this state.

After that, when the film cartridge 1 is loaded into the cartridge chamber 3a and the cartridge loading lid 6 is closed, the lock lever 11 and the lever 17 are in the state shown in FIG. 10 is turned off. Therefore, for the first time at this point, the photo reflector 1
The driving of 6 will be started.

According to each of the above embodiments, the photoreflector 16 is driven only when the cartridge loading lid 6 is closed, so that strong light such as sunlight is received by the photoreflector 16. There is no chance that the photoreflector will break down when it is incident on the part. Also,
Since the film cartridge 1 is not touched during this reading operation, a mistake in reading does not occur.

[0026]

As described above, according to the present invention,
Information reading means for optically reading the bar code recorded on the bar code disc, a lid for closing the cartridge chamber for accommodating the film cartridge, and a closing operation of the lid are provided. A switch means for interlocking with the state change and a drive start instruction means for driving the information reading means by discriminating that the state of the switch means has changed are provided, and the closing operation of the lid for closing the cartridge chamber. The switch means, which changes its state in conjunction with the above, determines that the state has changed so that the driving of the information reading means is started for the first time. Therefore, at the time of reading the bar code, external light is not incident on the information reading means for performing the reading operation, and the film cartridge is not touched. It is possible to prevent the means from malfunctioning.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a film cartridge used in the present invention.

FIG. 3 is a perspective view of the camera of the first embodiment of the present invention.

FIG. 4 is a bottom view of the camera of the first embodiment of the present invention.

FIG. 5 is a vertical cross-sectional view of the camera according to the first embodiment of the present invention when the film cartridge is loaded in the camera.

FIG. 6 is a flowchart showing the operation in the first embodiment of the present invention.

FIG. 7 is a vertical sectional view of a camera according to a second embodiment of the present invention when a film cartridge is loaded in the camera.

[Explanation of sign]

 1 Film Cartridge 1b Supply Spool 2 Bar Code Disk 6 Cartridge Loading Lid 10 Loading Lid Switch 16 Photoreflector 101 Control Circuit 105 Photoreflector Driving Circuit 101 Control Circuit

Claims (1)

[Claims] 1. A film cartridge having a bar code disk which rotates integrally with a feed spool in the film cartridge and in which information about the film is recorded by the bar code. An information reading means for optically reading a bar code recorded on the bar code disk, and a card for accommodating the film cartridge.
A lid for closing the trig chamber, a switch means for changing the state in association with the closing operation of the lid, and a drive start instruction means for driving the information reading means by discriminating that the state of the switch means has changed. A camera provided with.