JPH07219026A - Camera - Google Patents

Abstract

PURPOSE:To accurately feed a film by accurately guiding the leading edge of the photographic film to a film path and protecting the film path. CONSTITUTION:A pair of metallic guides 21a and 21b are fixed inside a groove on the cartridge housing chamber side through a positioning pin 13. The leading edge of the photographic film carried from a film cartridge is guided by the guide surface 40 of the guides 21a and 21b and is inserted between pins 26a and 26c and between the pins 26b and 26d. Then, the width direction of both edges of the photographic film is controlled by four pins 26a to 26d. Consequently, since the guides 21a and 21b are metallic so as not to be shaved, the leading edge of the photographic film is accurately guided to the film path and also the film path is protected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a film cartridge in which an unexposed photographic film is housed in the cartridge body up to the leading end.

[0002]

2. Description of the Related Art In a camera using a film cartridge in which an unexposed photographic film is housed in the cartridge body when not in use and the spool shaft is rotated to send the tip of the photographic film out of the cartridge body when in use, When the film cartridge is loaded, the fork of the cartridge storage chamber and the take-up shaft of the film storage chamber are respectively driven, and the leading end of the photo film fed into the film storage chamber through the film passage is engaged with the driving take-up shaft. After stopping, the winding shaft winds up until the first frame is set on the aperture. Therefore, this camera is convenient because the film loading can be performed like a cassette.

In the film cartridge, the photographic film wound around the spool shaft is prevented from being loosened, the rotation of the spool shaft is transmitted to the leading end of the photographic film, and the photographic film is rotated. The tip of the photographic film rotated in this way is scooped up from the outer peripheral surface of the photographic film by the separating claws and sent out from the film delivery port to the outside of the cartridge body.

Film cartridges of this type are described in Japanese Patent Application Laid-Open Nos. 5-224353 and 4-287039. In the former film cartridge, one flange is inclined with respect to the spool shaft, and this flange presses the photo film wound around the spool shaft against the other flange so that a part of the outermost peripheral surface of the photo film is clamped. ing. Further, in the latter film cartridge, the outermost periphery of the photographic film is wrapped from one end by an annular projection formed along the peripheral edge of one flange. In each of the film cartridges, a highly rigid base such as polyethylene naphthalate (PEN) is used for the base of the photographic film so that the photographic film does not bend when being pressed or when overcoming projections.

[0005]

However, in the former film cartridge, since one flange presses the photographic film, the leading end of the photographic film is biased toward the non-inclined flange side and sent out of the cartridge body. . Further, in the latter film cartridge, when the photographic film rides over the annular projection, the annular projection presses the photographic film, so that the leading end of the photographic film is biased toward the flange side without the annular projection and sent out of the cartridge body. When such a film cartridge is loaded in the above-mentioned camera, the leading end of the photographic film having high rigidity is constantly pressed against one side of the film passage. If such a state is repeated, one side of the film passage may be scraped. That is, the dimensional accuracy of the film passage in the width direction of the photographic film is deteriorated, and it becomes impossible to regulate the feeding of the photographic film with high accuracy.

The present invention has been made in view of the above circumstances.
An object of the present invention is to provide a camera which surely guides the leading end of a photographic film to a film passage and protects the film passage.

[0007]

In order to achieve the above object, in a camera according to a first aspect of the present invention, there is provided a film cartridge in which a spool film is rotated to send out a photographic film stored up to the leading end in the cartridge body. A pair of introduction guides made of metal or ceramic are provided in the film passage on the side of the cartridge storage chamber to be stored so that the frontage formed by these is wider than the frontage of the film passage on the side of the cartridge storage chamber. A pair of notches into which the introduction guide is inserted are provided on the cartridge storage chamber side. When the pins are made of metal or ceramic, they can be prevented from being scraped by the photographic film.

According to a third aspect of the present invention, one flange is inclined with respect to the spool shaft, and the photographic film wound around the spool shaft by this flange is pressed against the other flange to prevent the film from being loosened, thereby preventing the spool from winding. The tip of the photographic film sent from the film cartridge for transmitting the rotation of the shaft to the tip of the photographic film is guided to the film passage by the introduction guide. Claim 4
In the camera described above, an annular projection formed along the outer periphery of one flange wraps the outermost side edge of the photo film to prevent the film from loosening and to prevent the spool shaft from rotating. The leading end of the photographic film sent from the film cartridge that is transmitted to the leading end of the photographic film is guided to the film passage by the introduction guide.

[0009]

When the film cartridge is loaded and the spool shaft is rotated, the photographic film is delivered from the cartridge body. The leading edge of this photographic film is guided by an introduction guide made of metal or ceramic provided in the film passage on the cartridge storage chamber side,
It is sent to the film passage. Even if a highly rigid photographic film is pressed against the introduction guide during this guide, the guide surface is not scraped.

[0010]

FIG. 5 is a view of the camera of the present invention as viewed from the bottom and the rear side. On the bottom surface of the camera 2, a cartridge loading lid 3 that can be opened and closed and a lid opening knob 4 that can slide.
Is provided. When the lid opening knob 4 is slid to the position shown in the drawing, the hook 5 is disengaged, the cartridge loading lid 3 is opened, and the cartridge storage chamber 6 is exposed.
A film cartridge 7 as shown in the drawing is loaded in the cartridge storage chamber 6.

The film cartridge 7 is housed in the cartridge body 8 up to the leading end of a photographic film 9 shown by a chain double-dashed line in the drawing when not in use so that it can be loaded into the camera 2 like a cassette. After the loading, when the cartridge loading lid 3 is closed, the camera 2 rotates the spool shaft 10 via the fork provided in the cartridge storage chamber 6 to perform the initial film feeding.

In the initial feeding of the film, first, the spool shaft 10 is rotated, and the leading end of the photographic film 9 is fed out from the port portion 11 formed in the cartridge body 8. The leading end of the photographic film 9 is fed from the insertion opening 12 formed in the cartridge storage chamber 6 into the film passage 14 connecting the cartridge storage chamber 6 and the film storage chamber 17 shown in FIG. The film passage 14 is formed between a groove 16 formed behind an aperture 15 which defines the exposure range of the photographic film 9 and a film support plate which will be described later and is mounted in the groove 16. The leading end of the photographic film 9 fed through the film passage 14 is fed into the film storage chamber 17 and wound around the rotating winding shaft 18. After that, the photographic film 9 is the winding shaft 18
Then, the first frame is set on the aperture 15.

A pair of inner rails 20a and 20b are formed in the groove 16 so as to sandwich the aperture 15. From the insertion port 12 side so as to sandwich the pair of inner rails 20a and 20b, a pair of metal-made stainless steel guides 21a and 21b, a pair of positioning openings 22a and 22b, and a pair of outer rails 23a and 23b, respectively. A pair of positioning openings 24a and 24b are provided respectively. The pair of introduction guides 21a and 21b are fixed to each other through a pair of positioning pins 13 and positioned in the groove 16. Inner rails 20a, 20b and outer rail 2
By integrally forming 3a and 23b on the bottom surface of the groove 16,
It is positioned in the groove 16. In this embodiment, the introduction guides 21a and 21b are made of metal, but ceramics may be used.

As shown in FIG. 1, the groove 16 supports the back surface of the photographic film 9 to support the inner rails 20a, 20.
With b, a film support plate 25 for restricting the thickness direction of the photographic film 9 fed in the direction of the arrow in the drawing is attached. The film support plate 25 regulates the width direction of the photographic film 9 being fed, and the positioning openings 22a, 22 are provided.
The four pins 26a to 26d for fixing the film support plate 25 are fixed to the pins b, 24a and 24b. By the way, the width accuracy can be easily increased more by forming one set of pins at the distance h than by forming the rails of a constant length at the distance h. Therefore, the meandering amount of the photographic film whose feeding is controlled by the pair of four pins 26a to 26d should be smaller than the meandering amount of the photographic film 9 regulated by the rails and fed. You can

These four pins 26a to 26d are formed of metal into a cylindrical shape or a prismatic shape in accordance with the shapes of the openings 22 and 24, respectively. The film support plate 2
5, a pair of notches 27a and 27b are formed,
When the film support plate 25 is mounted in the groove 16, the pair of notches 27a and 27b are provided with a pair of guide portions 2a and 2b.
1a and 21b are fitted.

A recording / playback type magnetic head 30 and a substrate 31 are bonded to the back surface side (upper side in the drawing) of the film support plate 25. A driver IC 32 that drives the magnetic head 30, a control IC 33 that controls the driver IC 32, and the like are mounted on the substrate 31. The control IC 33 is connected to a CPU that controls the sequence of the camera.
The control IC 33 controls the driver I for each frame advance after photographing.
The magnetic head 30 is driven via C32, and the photographing data sent from the CPU is written in the magnetic recording layer formed on the photographic film 9 shown in FIG. In the drawing, the alternate long and short dash line indicates the photographing frame 35, the alternate long and two short dashes line indicates the range (recording track) 36 with which the magnetic head 30 is in sliding contact, and the hatched portion indicates the data recording area 37 in which data is written. In this embodiment, the recording / playback type is used for the magnetic head 30, but it may be a recording-only type or a reproduction-only type.

The magnetic head 27 has a pair of pins 38 integrally formed on the film support plate 25 as shown in FIG.
a, 38b, the cylindrical pin 26c shown in FIG.
26d respectively. The pins 26a and 26c and the pins 26b and 26d are arranged at an interval of a distance h, and these two sets of pins are provided on the photographic film 9 fed on the inner rails 20a and 20b. The widthwise deviation is restricted within the width h.

In FIG. 3, which shows the groove 16 in plan view,
A linear guide surface 40 is formed along the inner side of the pair of introduction guides 21a and 21b. These guide surfaces 40 become narrower toward the aperture 15 side so that the frontage formed by them has a width H on the insertion port 12 side and a width h (H> h) on the aperture 15 side. Therefore, even if the photographic film 9 is fed from the insertion opening 12 in a state of being inclined in the width direction, the leading end of the photographic film 9 is reliably fed between the pins 26a and 26c.

The outer rails 23a and 23b have the groove 16
Is integrally formed on the bottom surface of the inner wall surface of the guide surface 4
It is used as 1. This guide surface 41 has pins 26
When the leading edge of the photographic film 9 that has passed between a and 26c deviates from the film passage 14, it comes into contact with the leading edge of the photographic film 9, corrects the feeding direction, and the pins 26b, 2
Guides are sent during 6d. Also the outer rail 23
The a and 23b are arranged so that the width of the frontage formed by the pair of guide surfaces 41 is wider than the width h, and the photographic film 9 does not come into contact with them when the film is wound or rewound. Therefore, it is possible to reduce the feeding load when the film is wound or rewound.

FIG. 7 shows the inside of the above-mentioned film cartridge. The spool shaft 10 is provided with a pair of flanges 50 and 51 which come into contact with both end surfaces of the photographic film 7 wound around the spool shaft 10. The flange 50 is integrally formed with the spool shaft 10, and the flange 51 is formed with the spool shaft 1.
1 is attached so as to be tiltable in the axial direction. A pair of ridges 52a and 52b are formed on the side surface of the cartridge body 8, a ridge 53 is formed on the peripheral surface of the cartridge body 9, and a pair of separation claws 54 and 55 are formed inside the port portion 11. There is. The tips of the separating claws 54 and 55 are in contact with the outer peripheral surface of the photographic film 9 wound around the spool shaft 11.

The ridges 52a, 52b and 53 are the flange 5
1 and abut it to the state shown. Due to this inclination, the flange 51 presses a part of the outer peripheral surface of the photographic film 9 toward the flange 50 side. As a result, a part of the outer peripheral surface of the photographic film 9 is clamped by the flanges 50 and 51. Therefore, the photographic film 9 is prevented from being loosened, and the turning force of the spool shaft 10 is the outermost photographic film. 9 will also be transmitted. The photo film 9 is made of a highly rigid material such as polyethylene naphthalate for the film base so that the photo film 9 does not bend when sandwiched by the flanges 50 and 51.

In FIG. 8, when the spool shaft 10 is rotated counterclockwise, the leading end of the photographic film 9 is rotated counterclockwise inside the cartridge main body 8 and the separation claws 54, 55.
Abut. After that, when the spool shaft 10 is further rotated counterclockwise, the tip of the photographic film 9 is separated by the separation claw 54,
It is scooped up by 55 and is fed toward a film outlet 56 formed in the port portion 11, and is sent out of the cartridge main body 8 from the film outlet 56.

The operation of the camera 2 configured as above will be described. The lid opening knob 4 is operated to open the cartridge loading lid 3. The film cartridge 7 is inserted into the cartridge storage chamber 6 so that the film outlet 56 faces the insertion port 12, and the cartridge loading lid 3 is closed. When the cartridge loading lid 3 is closed, the CPU
Rotates a fork provided in the cartridge storage chamber 6 or a winding shaft 18 provided in the film winding chamber 17.

When the spool shaft 10 is rotated by the rotation of the fork, the leading end of the photographic film 9 is moved to the film outlet 5.
It is sent from 6 to the insertion opening 12 facing it. At this time, the photographic film 9 has the flange 51 and the flange 50.
Since it is pressed to the side, the tip comes into strong contact with one of the introduction guides, for example, the introduction guide 21a on the flange 50 side. The introduction guide 21a is used for the film support plate 2
Since it is fitted in the notch 27a of No. 5 and protrudes to the back side, the leading end of the photographic film 9 does not enter between the introduction guide 21a and the film support plate 25. When the spool shaft 10 is further rotated, the tip of the photographic film 9 is guided by the guide surface 40, and the pair of pins 26 of the two photographic films 9 are guided.
It is sent between a and 26c. This introduction guide 21a
Since the film is made of metal, even if the film base is a photographic film 9 such as polyethylene naphthalate having high rigidity, the guide surface 40 is not scraped. Further, since the photographic film 9 is supported by the introduction guide 21a, the pressing of the pin 26a by the photographic film 9 is relieved.

The tip of the photographic film 9 fed between the pins 26a and 26c by the further rotation of the spool shaft 10 is guided by the outer rail 23 to guide the pins 26b and 26b.
It is sent during d. After that, both edges of the photographic film 9 have one set of pins 26a, 26c and one set of pins 26b, 26.
Since the width direction of the photo film 9 is regulated at d, the photo film 9 is sent to the film storage chamber 17 without meandering and wound around the winding shaft 18 which is rotating.

The photographic film 9 whose both edges are regulated by the pair of pins 26a and 26c and the pair of pins 26b and 26d is positioned with respect to the film support plate 25, and the film support plate 25 is magnetically attached. Since the head 30 is positioned, the photographic film 9 does not meander in the gap 30 of the magnetic head 30 when the photographic film 9 being fed does not meander.
Always sent perpendicular to b. In addition, the magnetic head 30
Faces the same position on the photographic film 9 in the width direction of the photographic film 9. After this, the initial feeding of the film was completed, and the aperture 15 was replaced with the photo film 9-1.
The frame is set.

When the frame is advanced after photographing, the CPU causes the magnetic head 30 to pass through the control IC 33 and the triber IC 32.
Is driven to write data at the time of shooting in the data recording area 37 below the shooting frame 35. By the way, when the photographic film 9 being fed does not meander, the photographic film 9 is always fed perpendicularly to the gap 30b of the magnetic head 30 as described above, and the magnetic head 30 keeps the photographic film 9 in the vertical direction.
Since the recording tracks 36 face each other at the same position in the width direction, the recording tracks 36 are parallel to each other along the edge of the photographic film 9, so that data can be written in a good state. Further, even if the photographic film 9 meanders during feeding, the meandering can be suppressed to a small level by the four pins 26a to 26d, so that the track shift and the azimuth shift can be suppressed to a small extent and the data can be written well. it can.

In the above embodiment, only the introduction guide mounted in the groove is made of metal. However, the introduction guide, the inner rail and the outer rail are all made of metal and are integrally formed in the groove. It may be incorporated. Further, in this embodiment, the pair of introduction guides are attached in the groove, but the introduction guides may be attached only in the direction in which the photographic film is sent out in a biased manner.

FIG. 9 shows the inside of a film cartridge having an internal structure different from that of the film cartridge 7 described above. This film cartridge 60 has an annular protrusion 62 formed along the periphery of one flange 61, and the annular protrusion 62 wraps the outermost right edge of the photographic film 9 to prevent the photographic film 9 from being loosened. is doing. Therefore, when the spool shaft 63 is rotated, the leading end 9a of the photographic film 9 rotates in the cartridge body 64 together with the spool shaft 63.

In the thus constituted film cartridge 60, when the spool shaft 63 is rotated in the film feeding direction, the leading end 9a of the photographic film 9 is rotated in the film feeding direction and abuts on the separating claw 65. After that, when the spool 63 is further rotated, the photographic film 9
The tip 9a of the sheet is picked up by the separating claw 65 from the outermost peripheral surface and sent out toward the film outlet 56.

At this time, the photographic film 9 has an annular projection 62.
The right edge 9b of the photographic film 9 is pressed to the left by the annular projection 62 and is deformed as shown in FIG. Therefore, the leading end 9a of the photographic film 9 is always inclined toward the flange 66 side with respect to the ideal film feeding direction shown by the chain double-dashed line in the figure. Therefore, when the film cartridge 60 is loaded into the camera 2 of the present invention, the leading end 9a of the photographic film 9 sent out from the cartridge body 64 abuts against the above-mentioned introduction guide 21a and is guided by the pair of pins 26a and 26c. It will be reliably sent during. Even in the case of this film cartridge 60, when overcoming the annular protrusion 62,
The base of the photo film 9 is made of highly rigid polyethylene naphthalate (PE to prevent it from bending).
N) is used.

[0032]

As described above, in the camera of the present invention, the introduction guide formed of metal or ceramic is attached to the cartridge housing chamber side of the exposure frame,
Since the notch into which the introduction guide is fitted is formed in the film support plate, the leading end of the photographic film delivered from the inside of the cartridge body can be reliably guided to the film passage. Further, it is possible to prevent the leading end of the photographic film sent out from the cartridge body from slipping between the introduction guide and the film support plate. Further, since the leading end of the photographic film is prevented from slidingly contacting the film passage by the introduction guide, the film passage can be protected.

Since the pins are made of metal or ceramic, they can be prevented from being scraped by the photographic film. Therefore, the width direction of the photographic film is regulated to the film supporting plate with high precision forever. be able to. Furthermore, even with a film cartridge in which the photographic film is fed in one direction, the leading end of the photographic film delivered from the cartridge body can be reliably guided to the film passage.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a camera of the present invention.

FIG. 2 is a perspective view showing a film support plate of the camera of the present invention.

3 is a plan view of the main body base portion shown in FIG. 1. FIG.

FIG. 4 is a perspective view of a main part of the camera of the present invention with a part cut away.

FIG. 5 is a diagram showing an appearance of a camera of the present invention and a film cartridge used for the same.

FIG. 6 is a diagram showing a photographic film in which data is written in a magnetic recording layer in the camera of the present invention.

FIG. 7 is a view showing the inside of the film cartridge shown in FIG. 5 taken along line YY.

FIG. 8 is a sectional view of the film cartridge as viewed from the axial direction of the spool shaft.

FIG. 9 is a view showing the inside of another film cartridge.

10 is a view showing the film cartridge shown in FIG.
It is explanatory drawing which the front end of a photographic film is sent out.

[Explanation of symbols]

 2 camera 6 cartridge storage chamber 7 film cartridge 8 cartridge body 9 photo film 11 spool shaft 14 film passage 15 apertures 21a, 21b introduction guides 22a, 22b 24a, 24b opening 25 film support plate 26a to 26d pins 27a, 27b notch

Claims (4)

[Claims] 1. An exposure frame formed on a camera body and a film support plate for supporting a back surface of the photographic film regulate the thickness direction of the photographic film, and the photo frame is fitted into a positioning hole formed on the exposure frame. The cartridge storage chamber of the camera body was loaded into the film passage that regulates the width direction of the photo film by at least four pins provided on the film support plate that contact each side edge of the film at at least two places respectively. In a camera in which the spool shaft of the film cartridge is rotated to feed the photo film stored up to the leading end in the cartridge body, the photo frame is provided in the exposure frame between the film passage and the cartridge storage chamber. An introduction guide made of metal or ceramic is installed to guide the leading edge of the film to the film passage by sliding it. Rutotomoni, wherein the film support plate, the camera, characterized in that a cutout in which the introduction guide is inserted into the cartridge receiving chamber. 2. The camera according to claim 1, wherein the pin is made of metal or ceramic. 3. The introduction guide is configured such that one flange is inclined to a spool shaft, and the photographic film wound around the spool shaft is pressed against the other flange by the flange to prevent the film from being loosened, thereby preventing the spool shaft from being loosened. 3. The camera according to claim 1, wherein the tip of the photographic film sent from the film cartridge for transmitting the rotation of the photographic film to the tip of the photographic film is guided. 4. The introduction guide is an annular projection formed along the outer circumference of one of the flanges so as to wrap around the outermost side edge of the photographic film to prevent the film from being loosened, 3. The camera according to claim 1, wherein the leading end of the photographic film fed from a film cartridge for transmitting the rotation of the shaft to the leading end of the photographic film is guided.