JP3451823B2 - camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention particularly relates to a camera which mounts a film cartridge in accordance with a novel system and performs photographing. 2. Description of the Related Art A conventional camera is provided with an openable / closable back cover on a camera body. To load a patrone, open the back cover, load the patrone into the camera body, and then mount the back cover. Was done by closing. The film is automatically wound up by the closure of the back cover or the like, and is fed to a shooting position for photographing the first photograph. further,
Each time shooting is completed, the film is controlled to be fed to a shooting position for taking the second and subsequent photographs. In this new system, the film is completely contained in a film cartridge, which is described, for example, in US Pat. No. 5,347,334. For example, this film cartridge has a cylindrical shape, a spool for feeding and rewinding the film is rotatably provided at the center of the axis, and a film drawer is provided on a side surface parallel to the axis, A light-shielding door is provided at the film drawer. Therefore, the camera corresponding to the film cartridge needs to include a drive source and a drive mechanism for rotating the spool and opening and closing the light blocking door. Also, at the side edge of the film, a perforation, which is an opening that defines the position of the photographic image area, is provided.
It is necessary to control the feeding of the photographic image area to a predetermined position by detecting the position of the perforation by a sensor. [0003] The film housed in a film cartridge according to the above-mentioned novel system is provided with a perforation as an opening for defining the position of a photographic image area, and At the leading end of the film, there is provided a notch, which is a cutout for preventing idling inside the film cartridge. The positional relationship between the perforation and the notch is defined, and if the sensor is to be arranged at the center of the perforation, the sensor is located near the bottom of the notch of the notch. Therefore, when the perforation is detected by the sensor and the film is sent out from the film cartridge to control the feeding, the film may move in the feeding recess in the width direction in the feeding concave portion when the film is fed and the film is sent. An erroneous detection of detecting or not detecting the notch of the notch may occur. As a result, it is impossible to accurately count up to the perforation for controlling the position of the first photographic image area of the film, and the position of the predetermined photographic image area of the film is accurately positioned behind the taking lens unit (not shown). There is a problem that can not be located in. In this case, the above problem is solved by detecting a target perforation after a predetermined time delay after the sensor detects the leading end of the film, thereby not detecting the notch as a notch. Although a method can be considered, in particular, a magnetic head and a sensor for reading information from the film and writing information to the film are provided in the film feeding path. Because the sensor temporarily stops, the time from when the sensor detects the leading edge of the film to when the predetermined perforation defining the position of the photographic image area comes to the sensor position varies, and the predetermined time is delayed. In the solution according to the above, the notch part may or may not be detected. The problem arises that it is not possible to position accurately the position of the image area to the rear of the taking lens unit. SUMMARY OF THE INVENTION The present invention solves the above-described problem. Even if the film moves in the width direction within the feeding recess at the time of feeding the film, the position of a predetermined image forming area of the film can be photographed with a simple structure. It is an object of the present invention to provide a camera that can be accurately positioned at a position behind a lens unit. [0006] [Means for Solving the Problems] The camera of the present invention includes a detection portion and a distal notch for sequentially defining an image area is one
Provided side edge, feed of the film cartridge
Film, wherein the detecting portion is a film from the side edge end.
The end portion is located at a predetermined position in the film width direction.
An opening having a predetermined width, and the notch at the tip is
Notch provided in the film width direction from the side edge of the lum
The bottom of the notch is closer to the end than the end of the detector.
A film having a predetermined width on the edge side.
Camera that sequentially feeds the camera feeding path and shoots,
From the bottom of the notch to the end of the side edge of the film
Closer to the gap in the width direction between the film and the film feeding path.
From the end on the side edge side of the opening of the detection unit.
Film and film feed in the direction of the photographic image area of the film
A film feed control sensor provided to detect the detection unit and the leading end notch in an area between the position and the position close to the width direction gap with the feeding path. Is what you do. [0007] With this configuration, the sensor is simply disposed at a position excluding at least the gap between the film and the film feeding path in the width direction from the bottom of the notch at the front end. Even if is displaced in the width direction, the sensor does not detect or not detect the tip notch, and it is possible to reliably distinguish whether the sensor detects the tip notch or not. By counting the sensor output a predetermined number of times, the position of the predetermined image forming area of the film can be accurately positioned at the rear position of the taking lens unit. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a main configuration of a film feeding apparatus for a camera and a control block thereof according to an embodiment of the present invention. In FIG. 1, perforations 2 and 3, which are openings of the same shape as detection sections for sequentially defining the longitudinal position of a photographic image area 1, are provided on one side edge of a film 4 (in this case, the upper side). Side edges). That is, these perforations 2, 3
Are provided at one side edge of the film corresponding to both ends in the film feeding direction of the photographic image area 1 located at the center in the width direction of the film 4. Further, a notch portion 5 which is a cutout portion is provided at the edge of the front end of the film on the side where the perforations 2 and 3 are provided. Further, a photo-interrupter PI as a sensor for detecting the perforations 2 and 3 and the notch 5 is provided in the feeding path 6 of the film 4.
The photo-interrupter PI is provided on a passing path 7a passing near the notch bottom of the notch 5, that is, a passing path 7b indicated by a dashed line outside in the width direction except at least a position where the sensor causes an erroneous detection operation. I have. in this case,
The position where the sensor causes an erroneous detection operation is a position where at least the gap in the width direction between the film 4 and the film feeding path 6 is removed from the bottom 5a of the notch 5 at the front end. Therefore, the installation position of the photo interrupter PI is, in the longitudinal direction of the film feeding path 6, the perforations 2 corresponding to the position of the photographic image area 1 when taking a photograph.
3 is a position facing the center of any of the perforations (in this case, perforations 3), and in the width direction of the film feeding path 6, the side 2a of the perforations 2, 3 on the film upper edge side. , 3a and the bottom 5a of the notch 5, and the position where the sensor performs an erroneous detection operation is removed from the sides 2a, 3a and the bottom 5a toward the center. Further, a film feed control means 8 connected to a signal line to the photo-interrupter PI is connected to a drive means 9 comprising a film feed motor drive circuit, a motor and a drive transmission mechanism by a signal line. The spool 9 (not shown) of the film cartridge 10 is rotated or stopped by the driving means 9 so that the photographic image area 1 of the film 4 is sequentially fed to a predetermined position using the sensor output from the PI. Take control. As described above, the feeding control of the film 4 is performed based on the detection of the perforations 2 and 3 by the photo interrupter PI. Here, the camera in this embodiment will be described in more detail. FIG. 2 is a cross-sectional view of the camera body according to the embodiment of the present invention. In FIG. 2, a camera body 21 includes a photographing lens unit 22 having a photographing lens (not shown) disposed substantially at the center, and a photographing lens unit 22.
, A film loading chamber 23 in which the film cartridge 10 is loaded, a film feeding motor 24 which is disposed on the right side of the cartridge loading chamber 23 for winding and rewinding the film 4, A film winding chamber 25 disposed on the left side of the lens unit 22 and a battery storage chamber 27 for storing a battery 26 disposed at a lower right corner are provided. The cartridge loading chamber 23 is provided with a fork shaft (not shown) for rotating a spool of the film cartridge 10. Further, a cylindrical take-up spool 28 rotatably disposed in the film take-up chamber 25 and an axially parallel arrangement so as to abut against a peripheral surface of the take-up spool 28 at a required pressure. And a cylindrical film retainer 29 formed. Further, the motor 24 is connected to a fork shaft and a take-up spool 28 in the cartridge loading chamber 23 via a drive force transmission mechanism (not shown) including gears and the like.
The fork shaft and the take-up spool 28 are rotated by a motor 24 for feeding the film. The perforations 2 and 3 and the notch 5 are provided in a concave portion of the film passage 6 formed in the main body housing between the taking lens unit 22 and the film 4.
Is provided with a photo-interrupter PI which is an optical sensor for detecting. The photo-interrupter PI is arranged so as to face the perforations 2 and 3 of the film 4 and the passing position of the notch 5, and in the present embodiment, the photo-image area as a frame when the film 4 is at the shooting position. 1 is arranged at a position facing the perforation 3 on the upstream side in the feeding direction. FIG. 3 is a perspective view schematically showing the positional relationship between the film 4 of FIG. 1 and the photo interrupter PI. In FIG. 3, a film cartridge 10 is loaded in a cartridge loading chamber 23 provided in a housing which is a camera body, and a rotatable cylinder is mounted in a film winding chamber 25. A take-up spool 28 is provided, and the film 4 fed from the film cartridge 10 is wound around the take-up spool 28. At this time, the photographic image area 1 in which the longitudinal distance is defined by the perforations 2 and 3, which are predetermined openings provided at one side edge of the film 4, is between the film cartridge 10 and the take-up spool 28. It is located at a predetermined position behind the taking lens unit 22. At the position on the housing side, a photo-interrupter PI, which is a sensor for detecting an opening, is disposed so as to face the position where the film 4 passes through the perforations 2 and 3, and the film 4 is at the photographing position. Sometimes, it is arranged at a position facing the perforation 3 on the upstream side in the feeding direction of the photographic image area 1. FIG. 4 is a plan view of the film along with the novel system. As shown in FIG. 4, the film 4 is divided from the leading end into three regions: a leader portion 4a, an exposure portion 4b, and an end portion 4c. The leader section 4a is a lead section for pulling out the film 4 from the film cartridge, and the exposure section 4b is an area where a predetermined number of photographs are taken at a predetermined pitch. There are as many as. The end section 4c is an area for pulling out the film 5 from the film cartridge 10 by a predetermined size or more in order to enable photographing of the final photographic image area of the exposure section 4b. A notch 5 which is a notch for preventing idling in the film cartridge is provided at an appropriate position of the upper edge of the film 4 in the feeding direction. Apertures 2 and 3 which are rectangular and identically shaped openings are regularly formed in pairs along the line, and a photographic image for photographing is provided between these distant perforations 2 and 3. Regions 1 are sequentially provided. Furthermore, a pair of perforations 2,
3 are set to a predetermined size d1, and the intervals between adjacent perforations 2 or perforations 3 are set to a predetermined size d2 and at equal pitches. Further, as a specific numerical example, the dimension from the edge of the upper edge of the film 4 to the sides 2a, 3a of the perforations 2, 3 is 1.0 mm, and the dimension of the perforations 2, 3 in the film width direction is 2 mm. The depth dimension of the notch 5 is 2.0 mm. Therefore, the specific installation position of the photo interrupter PI in the film width direction is as follows.
Side 2 on the film upper edge side of perforations 2 and 3
a, 3a and the center of the bottom 5a of the notch 5, the distance from the edge of the upper edge of the film 4 to the center of the sensor is 1.5 mm, and the position at which the sensor causes an erroneous detection operation That is, the central portion where the width direction gap G between the film 4 and the film feeding path 6 is removed from the sides 2a, 3a and the bottom side 5a toward the central portion. The operation of the above configuration will be described below. FIG. 5 is a flowchart showing the operation of the main part of the film feeding device of the camera shown in FIG. First, the cartridge loading chamber 2 of the camera body
3 is loaded with the film cartridge 10 and the lid of the cartridge loading chamber 23 is closed.
Is opened, and feeding of the film 4 in the winding direction is started at # 1. At this time, the film cartridge 1
When the zero spool 10a is rotated via the motor 24, the driving mechanism, and the fork shaft, the film 4 is sent out from the film outlet of the film cartridge 10. Further, in # 2, it is determined whether or not the film 4 has been fed so that the photographic image area 1 of the film 4 is located at the photographable position of the first frame, that is, behind the photographing lens unit 22. This determination is made by the photointerrupter P, which is a sensor.
I is performed by detecting a perforation 3 corresponding to the photographic image area 1 of the first frame. At this time, the photo interrupter PI detects the notch portion 5 in accordance with the feeding of the film 4 and then detects the perforations 3 and 2 to detect the perforation 3 corresponding to the photographic image area 1 of the first frame. Become. These sensor detection outputs are sent to the film feed control means 8 and counted, and it is determined whether or not the first frame can be photographed based on whether or not the fourth detection pulse has been input. . Next, when the film 4 is not fed to the photographable position in # 2, the feeding is continued until the film 4 is fed to the photographable position, and the first film 4 is fed to the photographable position. Then, the winding operation is stopped at # 3. 4th
When the second detection pulse is input, a stop signal of the motor 24 is output to the motor drive circuit of the drive means 9.
As a result, the photographic image area 1 of the film 4 is located at a predetermined position behind the photographic lens unit 22, and when the shutter button is operated, the photographic image area 1 of the film 4 is In this way, a desired photographic image can be taken. Further, by the shutter operation of the first frame, in # 4, the film feeding control means 8 compares the number of storable images of the film 4 with the number of images actually photographed, thereby ending the shooting of the last frame. Judge whether or not.
If the shooting of the last frame has not been completed, the film 4
Is started. This winding operation is performed by rotating the spool 10a and the take-up spool 28 of the film cartridge 10 by the motor 24 and the driving mechanism. Further, in # 6, it is determined whether or not the film 4 is at the photographable position based on whether or not the perforations 2 and 3, that is, the perforations are detected twice. If the perforations are not detected twice in # 6, the winding operation of the film 4 is continued until the perforations are detected twice. If this perforation is detected twice in # 6, it is determined that the film 4 is at the photographable position, and the feeding and winding operations of the film 4 are stopped in # 7. As a result, the photographic image area 1 of the film 4 is located behind the photographic lens unit 22.
Is located, and a photographic image of a second frame can be taken there by the shutter operation. After the processing of # 7, the processing shifts to the processing of # 4 and the processing of each of # 4 to # 7 is repeated, so that the photographic images of the third and subsequent frames can be sequentially captured in predetermined photographic image areas. . Further, when it is determined at # 4 that the photographing of the last frame has been completed, the rewinding operation of the film 4 is executed at # 8. The rewinding operation of the film 4 is performed by the spool 10a of the film cartridge 10 and the take-up spool 28.
Is rotated in reverse by a motor 24 and a driving mechanism, so that the film 4
It will be rewound to zero. Therefore, the perforations 2 and 3 and the notch portion 5 extend from the bottom side 5a of the notch portion 5 to the film feeding route 6 which is outward (notch opening side) by the gap G in the width direction between the film 4 and the film feeding route 6. Is provided, even if the film 4 is displaced in the width direction at the time of feeding the film 4, the sensor is located at the position near the bottom of the notch as in the related art (within the range of the gap G). ), The photo interrupter P
I does not detect or not detect the notch 5, and the photo interrupter PI reliably detects the notch 5 and counts it a predetermined number of times to determine the position of the predetermined image forming area 1 of the film 4. It can be accurately positioned at the rear of the taking lens unit 22. In this embodiment, a sensor for detecting both the perforations 2 and 3 and the notch 5 as a detecting unit in the feed path 6 of the film 4 is provided from the bottom 5a of the notch 5 to feed the film 4 and the film. Film feed path 6 outside (notch opening side) by gap G in the width direction of path 6
, But the perforations 2 and 3
Sensor (not detecting the notch 5)
It may be provided in the film feed path 6 inside (the center side of the film 4) by the width direction gap G between the film 4 and the film feed path 6 from the bottom 5a of the notch portion 5, and in this case, the same applies. Thus, the effect of the present embodiment can be obtained. In this case, as shown in FIG. 7, the photo-interrupter PI ″ as a sensor has at least a passing path 7a near the notch bottom of the notch 5, that is, a position where the sensor causes an erroneous detection operation. In this case, the position at which the sensor performs an erroneous detection operation is defined by a notch at least by the widthwise gap between the film 4 and the film feeding path 6. This is a position removed from the bottom 5a of the portion 5 toward the center in the film width direction, and the configuration excluding the arrangement position of the photointerrupter PI ″ is the same as the configuration shown in FIG. Further, in this embodiment, the perforations 2 and 3 and the notch 5 as the detecting section are connected to the film 4.
In the above description, the sensors are provided on the upper edge side and the sensors are provided corresponding to them. However, they may be provided on the lower edge side of the film 4, and in this case, the effect of the present embodiment is similarly obtained. It is clear that we can do that. Further, in the above-described embodiment, the photo interrupter PI is provided in the film feed path 6 facing the predetermined position of the perforation 3 at the time of photographing, but at the time of photographing, the photo interrupter PI is provided as shown in FIG.
I 'may be provided on the film feeding path 6 facing a predetermined position between the perforations 3 and 2 on the side close to each other. In this case, the photointerrupter PI 'moves a certain distance even if the feed is stopped by detecting the edge from the opening to the closing portion.
Will stop between perforations 3 and 2. In the embodiment of FIGS. 1 to 5 described above, the photointerrupter PI detects the edge from the closing portion to the opening and stops feeding, and in this case, the photointerrupter PI moves by a certain distance, The photo interrupter PI stops at a position facing the perforation 3. Further, in this embodiment, the perforations 2 and 3 are detected by the photo interrupter PI. However, the perforations 2 and 3 may be detected by a photo reflector instead of the photo interrupter PI. The same effects as those of the present embodiment can be obtained. The detection means such as the photo-interrupter PI and the photo-reflector is a photo-interrupter PI
Or optical detection means such as photoreflectors,
The perforation may be detected by a mechanical detecting means such as a switch member having a section facing the perforation. In this case, the same effect as that of the present embodiment can be obtained. As described above, according to the present invention, the film feeding path outside or inside in the width direction from the bottom of the notch at the leading end by at least the gap in the width direction between the film and the film feeding path. In addition, since a sensor for detecting the detection unit and the notch at the tip or the detection unit is provided, the configuration is also simple, and even if the film moves in the width direction in the feeding path during the feeding of the film, The position of the predetermined photographic image area of the film can be accurately located at the position behind the photographing unit.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a main configuration of a film feeder of a camera and a control block thereof according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the camera body according to the embodiment of the present invention. FIG. 3 is a perspective view schematically showing a positional relationship between a film 4 in FIGS. 1 and 2 and a photo interrupter PI. FIG. 4 is a plan view of the film along with the novel system. FIG. 5 is a flowchart showing an operation of a main part of the film feeding device of the camera of FIG. 1; FIG. 6 is a schematic view of a main part of a camera according to another embodiment of the present invention as viewed from the back. FIG. 7 is a diagram showing a main configuration of a film feeding device of a camera and a control block thereof according to still another embodiment of the present invention. [Description of Signs] 1 Photographic image areas 2 and 3 Perforation 4 Film 5 Notch 5a Bottom 6 Film feeding path 7a Passing path 7b passing near the bottom of the notch 7b Passing path 8 at least outside gap G from side 5a Film Feed control means 9 Drive means 10 Film cartridge 10a Spool PI, PI ', PI "Photo interrupter G Width in the width direction

Continuation of front page (72) Inventor Yuji Nobemoto 2-3-1-13 Azuchicho, Chuo-ku, Osaka-shi Osaka International Building Minolta Co., Ltd. (56) References JP-A-7-31416 (JP, A) Hei 4-350646 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 17/00 G03B 17/26-17/34 G03B 17/38-17/46

Claims (1)

(57) [Claim 1] A film fed from a film cartridge , wherein a detecting portion and a notch portion for sequentially defining a photographic image area are provided at one side edge portion. , The detection unit
The end portion at a predetermined position in the film width direction from the side edge portion.
An opening having a predetermined width in the side edge portion end direction,
The notch at the front end is the width of the film from the side edge of the film.
A notch provided in the direction, and the bottom of the notch is
The film is on the side edge end side of the end of the portion,
A camera for sequentially feeding a film feeding path having a predetermined width and taking a picture, wherein a film is fed from the bottom of the notch at the front end.
A film and a film feeding path toward the end of the side edge of the film.
And the side of the opening of the detecting section
From the edge on the edge side toward the photographic image area of the film,
Position close to the gap in the width direction between the film and the film feeding path
And detecting the detecting portion and the notch portion in the region between
A camera provided with a sensor for controlling film feeding provided as described above .