JP2003344934A - Camera - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a camera capable of improving the flatness of film with simple constitution. <P>SOLUTION: The camera is equipped with a magnetic head for recording magnetic information on the film or reading the recorded magnetic information, a pressing means for pressing the film to the magnetic head, and a film gate part arranged between a cartridge chamber and a film take-up chamber, feeding the film in a direction perpendicular to the optical axis of the aperture and consisting of a pressing plate surface and an aperture surface, and has a correction means for correcting the deformation of the film with respect to a surface perpendicular to the optical axis direction of the aperture by the pressing means. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera that uses a magnetically recordable film cartridge in which the leading end of the film is housed in advance.

[0002]

2. Description of the Related Art In recent years, a film cartridge capable of magnetic recording has been disclosed in which the front end of a photographic film is all housed in advance in a cartridge.

FIG. 16 is a composite view of the above-mentioned photographic film cartridge. Reference numeral 7 denotes a cartridge, and the cartridge exterior is a perspective view for convenience. Reference numeral 7a denotes a spool engagement hole in the cartridge, and a fork gear 6 described later engages with the engagement hole 7a to obtain a rotational force. A spool shaft 7b in the cartridge holds the end of the photographic film, and winds the film 10 around the shaft. Reference numeral 7c denotes a flange portion of the spool in the cartridge, and a rising portion existing on the outer peripheral portion of the flange holds the width direction of the film so that the wound film does not spread in the cartridge.

The flange portion 7c is formed of a soft resin, and thrusts the film while pressing both end surfaces of the film 10 wound around the shaft 7b by the rising portions of the flange. Reference numeral 10a denotes a cutout portion provided in the film 10. When the film is completely rewound in the cartridge, the cutout portion 10a is formed in the flange portion 7a.
It fits in c and prevents the entire film leader part from being caught in the flange.

The shape of the end surface of the film 10 protruding from the cartridge into the film gate of the apparatus has a bending in the width direction as shown by H in FIG. The reason for this deflection is that both widthwise end faces of the film 10 delivered from the cartridge are thrust-fed while being pressed by the rising portion of the flange 7c, and the film is originally stored in a state wound in the cartridge. This is because the film has a curl and is bent in the film width direction when the film is stretched in the feeding direction.

[0006] Depending on the film, there is a case in which the film is annealed in a state of being wound in a cartridge to forcibly give a curl. The purpose of causing this deflection is to increase the rigidity of the film fed from the cartridge so that the leading end of the film of the photographic film does not buckle during gate feeding.

FIG. 17 shows a conventional example of a film feeding device using the cartridge. In FIG. 7, reference numeral 1 is a main body of the film feeding apparatus, and reference numeral 1a is an inner rail that regulates a film thickness direction of a gate portion through which the film passes, and is a substantial aperture reference surface. Reference numeral 1b is a rectangular aperture having a longitudinal direction in the film feeding direction for exposing a film in which a part of the tunnel portion is opened, 1c is an outer rail portion for regulating the film width direction of the tunnel portion, and 1d is a gate portion. The film chamber accommodates the film and is shielded by the film chamber cover 2.

Reference numeral 1k is a groove surface on the aperture side. Reference numeral 5 denotes a film winding shaft, which receives power from a motor 3 described later to drive the film 10 for winding. 9 is a back lid,
A gate through which the apparatus main body 1 and the film pass is formed to regulate the thickness direction of the film. Pressure plate surface and inner rail 1a
The distance between and is wider than the thickness of the film, and the distance between the gate and the film is secured across the gate.

Reference numeral 12 is a magnetic recording or reproducing head, which is fixed to the pressure plate side so that the gap surface faces the inside of the gate and is substantially flush with the pressure plate surface, and is a pressing means provided on the main body 1 side. The film 10 is pressed against the magnetic head 12 by a pad 13 biased by an elastic member 4 described later.

Reference numeral 8 denotes a film pressing means for pressing the film sent to the film chamber against the film winding shaft 5. Denoted at 8a are projections for restricting the position of the pressing means 8, which are provided at four positions on both end surfaces as shown in the drawing, and are fitted into the holes 2a of the film chamber lid 2 and the holes inside the film chamber 1d (not shown). Is held. 3 is a film feeding motor, 4 is a pinion gear, and 6 is a fork gear.

The power of the motor 3 is increased in torque by a reduction gear train (not shown) and transmitted to the fork gear, and the fork gear 6 engages with the spool 7a in the cartridge to feed the film from the cartridge 7 or to the cartridge 7. Rewind. Reference numeral 11 is a photographing means including an optical means for exposing a film, a shutter, a diaphragm, and a driving means, and 11a is an optical axis common to the photographing means and the aperture 1b.

FIG. 18 is a central transverse sectional view of the above-mentioned conventional example, FIG.
9 is a longitudinal sectional view of the above-mentioned conventional example.

18 and 19, the cartridge 7 is shown.
The shape of the film 10 sent out from the inside of the gate is as follows.

In the cross section A (inner rail end 1e), the film 10 enters the gate entrance provided with a space wider than the film thickness and is supported by the inner rail end 1e.
It is deformed in an M-shape so that both ends of the cross section and the center of the film slightly project toward the aperture side. The flexure H in the film width direction is strong because it is close to the cartridge, and since the film rigidity is also strong, the M-shaped deformation is large.

In the section B (close to the aperture opening portion cartridge), the film 10 is not supported by the inner rail 1a or the pressure plate 9, and the film is in an inclined state in which the support of the film is switched from the inner rail 1a to the pressure plate 9. The M-shaped deformation of the film cross section is reduced because it is separated from the cartridge, but remains.

In the C cross section (close to the aperture opening film section), the film 10 is in contact with the pressure plate surface, the vicinity of the aperture opening of the film is closely adhered to and supported by the pressure plate, and the cross-sectional shape of both ends is on the aperture surface side. It becomes a shape that bends to the groove portion 1k side.

In the D section (magnetic head portion), the film 1
The cross-sectional shape of 0 is similar to the cross-section of C, but the cross-sectional shape in which the film end is forcibly bent by the pad 13 toward the aperture side is pressed to the pressure plate side including the magnetic head 12.

In the E cross section (inner rail end 1f), the film cross section is substantially flat due to being wound up on the spool 5 having a cylindrical shape and being separated from the cartridge, and the film cross section is formed on the inner rail end 1f. It is supported.

As is clear from FIG. 19, the cross-sectional position A to P plane with respect to the reference side of the aperture side of the film.
You can see that E is constantly changing. In particular, the position of the side surface of the aperture of the film changes from the side of the aperture surface to the side of the pressure plate while inclining at the aperture opening of the cross sections B and C.

As a concrete example having the above-mentioned conventional structure, Japanese Patent Laid-Open Nos. 8-328113 and 10-10472.
There is No. 2 publication, etc.

[0021]

However, the above-mentioned conventional example has the following problems.

The first problem is that the aperture opening surface of the film is partially inclined. As shown in the above-mentioned conventional example, in the inner rail extending perpendicularly to the aperture optical axis and parallel to the film feeding direction, and in the gate provided with a space more than the film thickness for film feeding,
The film tilts near the aperture opening in the gate, and the flatness does not appear.

Therefore, when an image is to be formed on the film surface by the photographing means 11 through a lens, a partially blurred image is displayed because the film forming the image surface is partially inclined. Even in a device such as a film feeding device such as a film scanner or a printing device that captures an image on the film surface from the aperture opening, if the film surface of the aperture opening that becomes the original image is inclined, the original image will be accurate. It may not be possible to take it out.

In order to secure the flatness of the film in the gate, there is a method of simply making the distance between the entire surface of the inner rail 1a, which is the actual aperture reference surface, and the film adjoining surface 9 of the pressure plate close to the film thickness. . However, since there is no escape space for the film in the gate in the film thickness direction, the feeding load increases significantly, and the gate space is narrowed by a slight deformation of the pressure plate and the film is sandwiched, making it impossible to feed. Occurs.

The second problem is that it is unclear whether the film reference surface is on the pressure plate side or the aperture side.
When the magnetic head is fixed to the pressure plate side, pressing means
Since the (pad) forcibly presses the film against the magnetic head on the pressure plate side, the film has to follow the pressure plate side. For this reason, the inner rail, which has been conventionally regarded as the standard of flatness, actually follows the film only in the vicinity of both end portions 1e, 1f of the inner rail in the gate, and the flatness of the aperture surface of the film aperture is required. Most follow the pressure plate.

Therefore, the designed plane reference and the actual plane reference are distorted, and the desired design value optical performance of the photographing apparatus cannot be sufficiently obtained.

The third problem is that the film is deformed by the pad 13 and the pressing force of the pad adversely affects the film feeding. When performing magnetic recording / reproduction, it is necessary that a film, which is a magnetic recording medium, be brought into close contact with the gap surface of the magnetic head. When the deformation of the film end portion toward the aperture side is pressed to the magnetic head side only by the pressing member 13 as in the conventional example, the pressing force of the pressing means causes a frictional force on the film surface or the magnetic head surface, so that the sheet is fed. This will increase the load and cause stick-slip phenomenon.

Further, even if an inclined surface for pushing up the film to the magnetic head side is provided on the main body side at a position immediately before and after the pad in the film feeding direction as seen in Japanese Patent Laid-Open No. 8-328113, the tip of the inclined surface is provided. Since a gap more than the film thickness exists between the gap surface of the magnetic head and the gap surface of the magnetic head, the film cannot be sandwiched between the inclined surface and the gap surface of the magnetic head on a substantially flat surface, and eventually the pressure plate formed by the pad 13 is used. Film deformation to the side has occurred.

The fourth problem is that no simple method has been established for forcibly aligning the film with the pressure plate to secure the flatness of the film. Japanese Patent Application Laid-Open No. 10-104721 also discloses a method of providing a magnetic head pressing means near the lower part of the gate entrance, but since only the magnetic head is pressed toward the magnetic head, the pressing position arrangement is poor and the gate The vicinity of the upper part of the entrance falls toward the aperture side, and the flatness of the entire film near the aperture opening is not improved.

[0030]

In order to solve the above-mentioned problems, the present invention has the following constitution.

The invention according to claim 1 of the present application comprises a magnetic head for recording or reading magnetic information on a film, and a pressing means for pressing the film against the magnetic head. A camera, which is arranged between the cartridge chamber and the film winding chamber, feeds a film in a direction perpendicular to the aperture optical axis, and is provided with a film gate portion composed of a pressure plate surface and an aperture surface. It is characterized by having a correction means for correcting the deformation of the film with respect to the plane perpendicular to the aperture optical axis direction.

By adopting this structure, the film which tends to extend from the vicinity of the center of the aperture to the pressure plate side is not corrected by pulling the film toward the aperture side to obtain the flatness, but the correction means is provided to the pressure plate side. It is possible to obtain flatness by correcting the entire film by using it. Further, since the correction means does not elastically press the film, the frictional force between the pressing means and the film is small.

According to the second aspect of the present invention, the pressing means presses the film toward the magnetic head disposed on the pressure plate side, and the correcting means projects from the aperture side of the film gate portion to the film side. It is characterized in that the film is corrected so as to be along the pressure plate surface.

By adopting this structure, particularly with respect to the deformation of the film by the pressing means for the magnetic head provided on the pressure plate side, the correction means is used to move the film along the whole without changing the pressing direction. It becomes possible to correct and obtain flatness.

The invention according to claim 3 of the present application is characterized in that the correction means is arranged at least one of immediately before and after the film feeding direction with respect to the pressing means, and holds the film together with the magnetic head.

With this configuration, the film can be pressed against the magnetic head by the pressing means after the correcting means corrects the film deformation to the position where the film can be brought into close contact with the magnetic head. Therefore, the pressing force of the pressing means can be reduced, The feeding load is reduced and the stick-slip phenomenon of the pressing part is also reduced.

Also, the film deformation that occurs when the pressing means alone is inclined to the inner rail end portion with the pressing portion of the pressing means as the apex is pressed by the correction means provided immediately before or after the pressing means. The deformation can be corrected by using the surface as a plane.

The invention according to claim 4 of the present application is characterized in that the correction means is arranged between the gate entrance of the film gate portion and the aperture optical axis.

By adopting this structure, the correction means can be effectively arranged in the minimum number in the portion from the gate entry slot to the aperture optical axis where the inclination of the film in the gate is most likely to occur, and the flatness is required most. It is expected that the flatness of the aperture opening surface of the film will be improved.

In the invention according to claim 5 of the present application, the correcting means is arranged at a plurality of positions between the gate entrance of the film gate portion and the aperture optical axis and between the aperture optical axis and the film winding chamber. It is characterized by

By adopting this structure, it is possible to surely correct the vicinity of the four corners of the aperture opening surface of the film, which is the basis of flatness, to the pressure plate side, improve the flatness of the entire film in the gate, and adhere the film to the magnetic head. The property is also improved.

According to a sixth aspect of the present invention, in a camera having a rectangular aperture whose longitudinal direction is the film feeding direction, the correction means projects from the aperture side to the film side, and the film is sandwiched between the apertures. It is characterized in that it is arranged at least at two positions on the upstream side and the downstream side in the feeding direction, and is arranged in the vicinity of the side portion of the aperture opening which is perpendicular to the film feeding direction.

By adopting this construction, it is possible to support the film in the gate by the inner rail extending in the film feeding direction, which has been conventionally common knowledge, as in the invention of the present application. It becomes possible to support with the correction unit arranged near the part, and the film near the aperture opening does not fall to the aperture side,
The film flatness can be remarkably improved, and the film adhesion to the magnetic head is also improved.

The invention according to claim 7 of the present application is characterized in that the pressure plate surface facing the correction means has a recess different from the most adjacent surface of the film.

With this configuration, it is possible to correct the film so that the film runs along the pressure plate side by the correction means while ensuring a film-thickness direction gap that allows the film to sufficiently pass through the gate. Therefore, the film feeding load can also be reduced. Further, even if the pressure plate is deformed to some extent, the film cannot be sandwiched between the pressure plate and the main body and the film cannot be fed.

According to the eighth aspect of the present invention, the magnetic head for recording magnetic information on the film or for reading the recorded magnetic information is disposed between the cartridge chamber and the film winding chamber. A film gate portion formed by feeding the film in a direction perpendicular to the optical axis of the aperture and comprising a pressure plate surface and an aperture surface, and a first pressing means for pressing the film to the magnetic head arranged on the pressure plate surface side, A camera provided with a second pressing means for pressing the film against the pressure plate surface, wherein at least one of the first pressing means and the second pressing means is provided between the gate entrance of the film gate portion and the aperture optical axis. It is arranged in.

With this structure, a gap in the film thickness direction can be secured so that the film can sufficiently pass through the gate. In addition, the film pressing means can be effectively arranged in the minimum number in the part from the gate entrance where the inclination of the film in the gate is most likely to occur to the aperture optical axis, and the flat surface is required for the aperture opening surface of the film which requires the most flatness. Is expected to improve.

Further, since the pressing means for pressing the film against the magnetic head can be used also as the means for improving the flatness of the film, the number of parts can be reduced.

In the invention according to claim 9 of the present application, the first pressing means or the second pressing means arranged between the gate entrance and the optical axis of the aperture are near the corner of the rectangular aperture opening. It is characterized in that they are distributed.

By adopting this structure, a plurality of film pressing means can be effectively arranged in a well-balanced manner at the corners of the rectangular aperture opening where the film most falls toward the aperture side, and the aperture opening where film flatness is required is provided. The film of can be corrected to the platen surface.

[0051]

(First Embodiment) FIG. 1 is an exploded perspective view showing a first embodiment. The feature of the first embodiment is the correction convex portion 1g which is the film correction means provided at the film gate entrance of the apparatus. The correction convex portion 1g is provided on the cartridge-side ends of the upper and lower inner rails 1a.

The magnetic head 12 is fixed to the film-adjacent surface 9b closest to the film so that the gap surface of the magnetic head is substantially aligned. The pressure plate surface 9a facing the correction convex portion 1g forms a surface farther from the film than the film adjacent surface 9b.

FIG. 2 is a central cross sectional view of the first embodiment, and FIG.
[FIG. 3] is a vertical sectional view of the first embodiment.

In FIGS. 2 and 3, the shape of the film 10 sent out from the cartridge 7 in the gate is as follows.

In the A section (correction convex portion 1g), the film 10 enters the gate entrance provided with a space wider than the film thickness, and is supported by the correction convex portion 1g. It has an M-shaped deformation that slightly projects toward the aperture. Deflection of film H
(See FIG. 16) is strong because it is close to the cartridge, and since the film rigidity is also strong, the deformation of the M shape is large.

However, since the film supporting position of the correction convex portion 1g is set to a height substantially equal to the surface of the pressure plate that is separated from the film adjacent surface 9b by the film thickness, the film 10 that has passed through the correction convex portion is formed on the pressure plate adjacent surface. It is fed in the apparatus gate along the pressure plate adjacent surface 9b without being inclined with respect to 9b. Therefore, in the first embodiment, in order to correct the film deformation due to the pad 13 which is the pressing member, the film is flattened not by following the aperture surface side but by following the pressure plate side.

Further, the surface 9 facing the correction convex portion 1g of the pressure plate
Since a is a surface farther from the film than the film-adjacent surface 9b, the film can rush into the gate opening portion while maintaining the rigidity in which the deflection H (see FIG. 16) is maintained. Therefore, the film can be stably fed without buckling. In addition, the bending of the film on both sides of the aperture surface side groove 1k is left as much as possible, and correction is performed so that only the periphery of the aperture opening where planarity is a problem is flattened. You can suppress the increase.

In the B section (aperture opening portion), the film 10 has the film adjoining surface 9b of the pressure plate and the correction convex portion 1g.
The film is sandwiched by the rigidity of the film and separated from the inner rail 1a and held by the pressure plate. Also, the gap between the gates in the film thickness direction (from the platen adjoining surface 9b to the surface of the inner rail 1a) is ensured to be equal to or more than the film thickness. The film aperture correction is suppressed because the film aperture correction is performed by focusing on the aperture opening where the film is required.

In the C section (magnetic head portion), the film 1
The cross-sectional shape of 0 is similar to the cross-section of B, but has a cross-sectional shape in which the edge of the film is bent by the pad 13 toward the aperture side is forcibly pressed toward the pressure plate having the magnetic head 12.

As is apparent from the first embodiment shown in FIGS. 1, 2, and 3, the side surface of the aperture of the film is always the P plane at the cross-section positions A, B, and C with respect to the P plane which is the reference of the apparatus. It can be seen that they match and are smooth. Utilizing the rigidity of the film, the correction convex part 1g near the film gate entry part
In the vicinity of the aperture opening, the film adjoining surface 9 of the pressure plate is
b, the flatness is improved by appropriately changing the supporting position of the film on the adjacent surface 9b (same as the magnetic head gap surface) near the magnetic head depending on the position in the gate.

(Second Embodiment) FIG. 4 is an exploded perspective view showing a second embodiment. The feature of the second embodiment resides in that a correction convex portion 1h as a film correction means having a length substantially equal to the longitudinal end face of the rectangular aperture is provided at the entrance of the film gate of the apparatus. Further, a correction convex portion 1i which is a film correcting means is provided immediately before and immediately after the pad 13 which is the magnetic head pressing means in the film feeding direction, and the film is sandwiched between the correction convex portion 1i and the magnetic head gap. The film is held flat.

Further, the pad 1 on the side of the film winding chamber 1d, which is the only uncorrected one, at the four corners of the rectangular aperture opening.
A correction convex portion 1j, which is a film correction means, is provided in the vicinity of the optical axis symmetric position 3 to adjust the balance of the film correction position, and the entire film is arranged along the film adjoining surface 9b of the pressure plate. The inner rail 1a, which is not directly related to the flatness of the film, is abolished.

The pressure plate 9 has a film adjoining surface 9b closest to the film, and a surface 9a facing the correcting projections 1h, 1i, 1j is formed with a surface farther from the film than the film adjoining surface 9b. The magnetic head 12 is held so that the gap surfaces of the magnetic head substantially coincide with each other.

FIG. 5 is a central cross sectional view of the second embodiment, and FIG.
[FIG. 6] is a vertical sectional view of a second embodiment.

In FIGS. 5 and 6, the shape of the film 10 sent out from the cartridge 7 in the gate is as follows.

In the cross section A (correction convex portion 1h), the film 10 enters the gate entrance provided with a space wider than the film thickness, and is supported by the correction convex portion 1h. It has a C-shaped deformation that causes the groove 1k to slightly project.

Compared with the first embodiment, the flatness of the center of the film is improved because the fall of the center of the film toward the aperture side that occurs near the gate entry portion is corrected to the pressure plate side by the correction protrusion. To do. In addition, the deflection toward the aperture side at both ends of the film, which does not require relatively flatness, is allowed by not correcting the vicinity of the film end face by the correction convex portion 1h so that the film gate passing load due to the film correction is not increased. ing.

In the B section (aperture opening portion), the film 10 has the film adjoining surface 9b of the pressure plate and the correction convex portion 1.
The film is sandwiched by h, 1i, and 1j by the rigidity of the film, and is supported along the pressure plate apart from the aperture surface. Further, the distance between the gates in the film thickness direction (the pressure plate adjacent surface 9b
(To the aperture surface side groove 1k) is secured more than the film thickness, and the bending of both ends of the film toward the aperture side is allowed, and the aperture open part where film flatness is required is focused. Since the film surface is corrected, the increase in the load passing through the film gate is suppressed.

In the C section (magnetic head portion), the film 1
The cross-sectional shape of 0 is similar to the cross-section of B, but the first feature is that the film end is not forcibly pressed to the magnetic head side by the pad 13 as in the first embodiment. Correcting convex portion 1i provided immediately before and after the pad 13
Then, the film is preliminarily lifted to the same plane as the P plane serving as the reference plane, and the flatness is maintained in the form in which the film is sandwiched by both the correction convex portions 1i and the magnetic head gap. Since it is not necessary to make a correction to the side, the pressing force of the pad 13 can be made lower than in the first embodiment.

Further, waviness deformation of the film itself due to feeding the film is reduced around the gap of the magnetic head, so that the adhesion of the film to the gap is improved and the magnetic recording / reproducing capability is improved. Further, since the pressing force of the pad that directly presses the film can be reduced, the frictional force can be reduced and the increase in the load passing through the film gate can be reduced.

As the second feature, by providing the correction convex portion 1j, it becomes possible to correct all four corners near the aperture opening of the film with good balance. Further, the correction convex portion 1j is arranged at a position where the deflection of the film end surface toward the aperture surface side is allowed, and the width of the film gate in the thickness direction is also different from the pressure plate surface 9a.
Since the interval i, 1j is wider than the film thickness, the increase in the load passing through the film gate is suppressed.

As is apparent from the second embodiment shown in FIGS. 4, 5 and 6, the side surface of the aperture of the film is always the P plane at the sectional positions A, B and C with respect to the P plane which is the reference of the apparatus. It can be seen that they match and are smooth. Utilizing the rigidity of the film, the correction protrusion 1h near the film gate entry
In the vicinity of the aperture opening, the film adjoining surface 9 of the pressure plate is
b, the flatness is improved by appropriately changing the supporting position of the film on the gap surface of the magnetic head and the correction convex portions 1i, 1j near the magnetic head depending on the position in the gate.

(Third Embodiment) FIG. 7 is an exploded perspective view showing a third embodiment. The feature of the third embodiment is that a correction convex, which is a film correction means having a length substantially equal to the vertical end face of the rectangular aperture, is provided in two aperture surface side groove portions 1k near the film gate entrance and the film winding chamber of the apparatus. It is where the members 15, 16 are provided.

Further, a correction convex portion 1i which is a film correction means is provided immediately before and immediately after the pad 13 which is the pressing means for the magnetic head in the film feeding direction, and the film is flat so that the film is sandwiched by the magnetic head gap. It is in the place where it is maintained. Further, the inner rail 1a which is not directly related to the flatness of the film is abolished.

The pressure plate 9 has a film adjoining surface 9b closest to the film, and a surface 9a facing the correcting projections 15, 16, 1i is formed with a surface farther from the film than the film adjoining surface 9b. The magnetic head 12 is held so that the gap surfaces of the magnetic head substantially coincide with each other.

FIG. 8 is a central cross-sectional view of the third embodiment of the present invention,
FIG. 9 is a vertical sectional view of the third embodiment.

In FIGS. 8 and 9, the shape of the film 10 sent out from the cartridge 7 in the gate is as follows.

In the cross section A (correction convex portion 15), the film 10 enters the gate entrance having a space wider than the film thickness and is supported by the correction convex portion 15, and both ends of the film cross section are formed into the side grooves of the aperture surface. It has a C-shaped deformation that causes the portion 1k to slightly project. In the second embodiment, there is no drop in the center of the film toward the aperture side that occurs near the gate entry portion because it is corrected to the pressure plate side by the correction convex portion 1h, but there is a problem of film feeding damage that occurs on the aperture surface. There is.

Therefore, in the third embodiment, the correction convex portion 15
Was made into a separate component from the main body 1 by using a fluororesin or the like that is less likely to cause friction. Therefore, not only the flatness is improved as in the second embodiment, but also the film scratch can be prevented. Needless to say, other resin, metal, or a material having a lubricating surface treated thereon, which has a hardness comparable to the rigidity of the film having good lubricating performance other than the fluororesin may be used.

Further, the deflection of the both end portions of the film toward the aperture side, which does not require the flatness relatively, is allowed by not correcting the vicinity of the film end surface by the correction convex portion 15,
The film gate passing load due to film correction is not increased.

In the cross section B (aperture opening), the film 10 has the film adjoining surface 9b of the pressure plate and the correction convex portion 1.
5, 16 and 1i are sandwiched by the rigidity of the film and are supported by a pressure plate apart from the aperture surface. Further, since the groove 9c is provided on the film adjoining surface 9b of the pressure plate to reduce the contact area with the film, the sliding friction force is reduced and the fluctuation in the film gate passing load is suppressed.

In the C cross section (magnetic head portion), in the second embodiment, the correction convex portion 1j only partially corrected the corner portion of the aperture opening portion of the film, whereas it was almost the same as the vertical end surface of the rectangular aperture. The difference lies in that a correction convex member 16 which is a continuous film correction means of equal length is provided. Correction convex part 1
6 is a component separate from the main body 1 by using a fluororesin that hardly causes friction.

Therefore, not only the flatness is improved as in the second embodiment, but also the film scratch can be prevented. Needless to say, other resin, metal, or a material having a lubricating surface treated thereon, which has a hardness comparable to the rigidity of the film having good lubricating performance other than the fluororesin may be used. Further, if the film scratches and the like are not taken into consideration, the correction convex portion 16 may be integrated with the main body.

Further, the bending of the both end portions of the film, which does not require relatively flatness, toward the aperture side is allowed by not correcting the vicinity of the film end surface by the correction convex portion 16,
The film gate passing load due to film correction is not increased. The cross-sectional shape of the film 10 is similar to that of the B-section, but compared to the first and second embodiments, the correction projections 15 and 16 support the film near both sides in the vertical direction of the rectangular aperture, and the film is adjacent to the film. Since it follows the surface 9b, the flatness on the aperture surface of the film is significantly improved. The effect of the correction convex portion 1i is the same as that of the second embodiment, and thus the description thereof is omitted.

As is apparent from the third embodiment shown in FIGS. 7, 8 and 9, the side surface of the aperture of the film is always the P plane at the sectional positions A, B and C with respect to the P plane which is the reference of the apparatus. It can be seen that they match and are smooth. By utilizing the rigidity of the film, the correction convex portion 15 near the film gate entry portion is used.
In the vicinity of the aperture opening, the film adjoining surface 9 of the pressure plate is
♭ In the vicinity of the magnetic head, the flatness is improved by appropriately changing the supporting position of the film on the gap surface of the magnetic head and the correction projections 1i and 16 depending on the position in the gate.

(Fourth Embodiment) FIG. 10 is an exploded perspective view showing a fourth embodiment. The feature of the fourth embodiment resides in that a correction convex portion 1g which is a film correction means provided at the film gate entrance of the apparatus is provided. Further, a correction convex portion 1i which is a film correcting means is provided immediately before and after the pad 13 which is a magnetic head pressing means on the cartridge chamber side from the aperture optical axis in the film feeding direction, and the film is sandwiched by the magnetic head gap. The film is held flat in a flat shape.

The correction convex portion 1g is provided at the cartridge side end of the inner rail 1a on the side away from the magnetic head.
On the other hand, the correction convex portion 1i is provided at the cartridge side end of the inner rail 1a on the magnetic head side. These two correction convex portions 1g and 1i are arranged in good balance in the vicinity of the corners of the rectangular aperture symmetrically with respect to the optical axis of the aperture. The magnetic head 12 is fixed to the film adjoining surface 9b closest to the film so that the gap surface of the magnetic head is substantially aligned, and the surface 9a facing the correction protrusions 1g and 1i is farther from the film than the film adjoining surface 9b. Forming a surface.

FIG. 11 is a central cross sectional view of the fourth embodiment, and FIG. 12 is a vertical cross sectional view of the fourth embodiment.

In FIGS. 11 and 12, the cartridge 7
The shape of the film 10 sent out from the inside of the gate is as follows.

In the cross section A (correction convex portion 1i on the cartridge side), the film 10 enters the gate entrance provided with a space wider than the film thickness and is supported by the correction convex portions 1i and 1g. And an M-shaped deformation that slightly protrudes the center of the film toward the aperture side. The deflection H (see FIG. 16) of the film is strong because it is close to the cartridge, and the film rigidity is also strong, so that the M-shaped deformation is large.

However, since the film supporting positions of the correction convex portions 1i and 1g are set to a height almost equal to the film thickness from the film adjacent surface 9b of the pressure plate, the film 10 passing through the correction convex portion has a film supporting position with respect to the pressure plate adjacent surface 9b. It is fed inside the device gate along the adjacent surface of the pressure plate without tilting. Therefore, in Example 4, the film deformation by the pad 13 that is the pressing member is not caused to follow the aperture surface side, but
It is flattened along the pressure plate side.

Further, since the surface 9a of the pressure plate facing the correction convex portions 1i, 1g is a surface farther from the film than the film adjacent surface 9b, the rigidity maintaining the flexure H (see FIG. 16) of the film is maintained. The film can be rushed in as it is. Therefore, the film can be stably fed without buckling. In addition, the deflection toward the aperture side at both ends of the film is left as much as possible, and correction is performed so that only the periphery of the aperture opening where planarity is a problem is flattened. The increase can be suppressed.

In the B cross section (magnetic head portion), the cross sectional shape of the film 10 is the same as that of the first embodiment.
The edge of the film is not pressed by itself to the aperture side. The correction convex portion 1i provided immediately before and after the pad 13 lifts the film in advance to the same plane as the P plane serving as the reference surface, and the flatness is obtained by sandwiching the film between the correction convex portions 1i and the magnetic head gap. Therefore, the pressing force of the pad 13 can be made lower than that in the first embodiment.

Further, since the deformation of the film itself is reduced around the gap of the magnetic head, the adhesion of the film to the gap is improved and the magnetic recording / reproducing ability is improved. Further, since the pressing force of the pad that directly presses the film can be reduced, the frictional force can be reduced and the increase of the load passing through the film gate can be reduced. Further, the correction convex portion 1i effectively corrects the film to the pressure plate side at the gate entrance, which has the largest drop toward the aperture side of the film.

As a second feature, by providing the correction convex portion 1g, it is possible to correct the two corners of the gate entrance of the film with good balance. Further, the correction convex portion 1g is arranged at a position where the deflection of the film end surface toward the aperture surface side is allowed, and the width in the thickness direction of the film gate is also
Since the distance between the pressure plate surface 9a and the correction convex portions 1i and 1g is made larger than the film thickness, an increase in the film gate passing load is suppressed.

In the C cross section (aperture opening portion), the film 10 has the film adjoining surface 9b of the pressure plate and the correction convex portion 1.
The film is sandwiched between g and 1i by the rigidity of the film, and is supported so as to be separated from the inner rail 1a and along the film adjoining surface of the pressure plate. In addition, the distance between the gates in the film thickness direction (from the pressure plate adjacent surface 9b to the surface of the inner rail 1a) is secured to be equal to or more than the film thickness, and the deflection of both ends of the film toward the aperture side is caused by the adjacent surface 9b and the aperture surface side groove portion 1k. Space is provided to allow it, and the aperture area where film flatness is required is focused on the film surface correction, so the increase in the film gate passing load can be suppressed. There is.

In the D cross section (inner rail end 1f), the film cross sectional shape is substantially flat due to being wound up on the spool 5 having a cylindrical shape and separated from the cartridge, and the film cross section is formed on the inner rail end 1f. It is supported.

As is apparent from the fourth embodiment of FIGS. 10, 11 and 12, the side surface of the aperture of the film is always the P plane at the cross-section positions A, B and C with respect to the P plane which is the reference of the apparatus. It can be seen that they match and are smooth. By utilizing the rigidity of the film, the film supporting position is appropriately set on the correction convex portions 1g and 1i near the film gate entry portion and the magnetic head, on the film adjacent surface 9b of the pressure plate near the aperture opening, depending on the position inside the film gate. By changing it, the flatness is improved.

(Fifth Embodiment) FIG. 13 is an exploded perspective view showing a fifth embodiment. The feature of the fifth embodiment is that two film pressing means are provided in a well-balanced manner in the vicinity of the corner portion of the aperture from the aperture optical axis to the cartridge chamber. That is, the pad 13 that presses the film from the aperture optical axis that is the first pressing means to the magnetic head on the cartridge chamber side, and the film that makes the aperture optical axis 11a substantially symmetrical to the first pressing means The pad 17 is a second pressing unit that presses the aperture surface toward the pressure plate.

The pad 17 is biased from the aperture side to the film side by the elastic member 18. Magnetic head 12
Is fixed to the pressure plate 9 so that the gap surface of the magnetic head is substantially aligned with the film adjoining surface 9b closest to the film.

FIG. 14 is a central cross sectional view of the fifth embodiment, and FIG. 15 is a vertical cross sectional view of the fifth embodiment.

In FIG. 14 and FIG. 15, the cartridge 7
The shape of the film 10 sent out from the inside of the gate is as follows.

In the cross section A (inner rail end 1e), the film 10 enters the gate entrance having a space wider than the film thickness and is supported by the inner rail end 1e.
It has an M-shaped deformation that slightly projects both ends of the cross section and the center of the film toward the aperture side. The flexure H in the film width direction is strong because it is close to the cartridge, and since the film rigidity is also strong, the M-shaped deformation is large.

In the cross section B (magnetic head portion), the cross sectional shape of the film 10 is such that both end portions of the film are pressed by the pad 13 and the pad 17 to the same plane as the P surface serving as the reference surface, and the film serves as a pressure plate. The flatness is maintained by being forced along. By providing the second pressing means 17, the upper and lower two corners of the film can be corrected with good balance. Further, the first pressing means 13 has both effects of pressing the film against the magnetic head 12 and improving the flatness by moving the film to the pressure plate side.

In the C section (aperture opening), the film 10 is in contact with the surface of the pressure plate, the vicinity of the aperture opening of the film is closely supported by the pressure plate, and only the both end portions are bent toward the aperture side.

In the D cross section (inner rail end 1f), the film cross section is substantially flat due to being wound up on the spool 5 having a cylindrical shape and being separated from the cartridge, and the film cross section is formed on the inner rail end 1f. It is supported.

As is clear from the fifth embodiment shown in FIGS. 13, 14 and 15, the side surface of the aperture of the film substantially coincides with the P plane at the cross-section positions B and C with respect to the P plane which is the reference of the apparatus. It can be seen that it is smooth. The flatness of the film is improved simply by providing the existing first pressing means (the pad for the magnetic head) and the second pressing means in the vicinity of the gate entrance where the film is most deformed and the vicinity of the magnetic head. .

The first to fifth embodiments described above are examples of specific examples of the present invention, and the correction convex portions 1g, 1h, 1i, 1j and the correction convex members 15, 16 in the first to fifth embodiments are described. The pressing members 13, 14, 17, 18 may be combined appropriately.

Further, the pressing means has a structure in which the pad portion and the elastic portion are combined, but they may be integrated. A larger number of film correction means may be provided than in the embodiment.
The shape of the film correction means may be different from that of the embodiment as long as the functions are the same.

[0110]

As described above, according to the first embodiment, the film can be made to follow the film adjacent surface of the pressure plate without increasing the number of parts and without increasing the load passing through the film gate. , The flatness of the film in the vicinity of the aperture opening and the magnetic head is improved.

According to the second embodiment, the film flatness particularly near the magnetic head is improved more than in the first embodiment without increasing the number of parts. Further, the film adhesion accuracy to the magnetic head is also improved, and the magnetic recording signal accuracy and reproduction signal characteristics are also improved.

According to the third embodiment, the film flatness in the vicinity of the aperture opening and the magnetic head is improved more than in the first and second embodiments while preventing the occurrence of film scratches. Further, since the concave portion 9c is provided on the pressure plate adjacent surface 9b, the frictional force when passing through the film gate is reduced.

According to the fourth embodiment, the film can be made to follow the film adjoining surface of the pressure plate without increasing the film gate passing load without increasing the number of parts, and the aperture opening and the vicinity of the magnetic head can be provided. The film flatness is improved. Further, the film adhesion accuracy to the magnetic head is also improved, and the magnetic recording signal accuracy and reproduction signal characteristics are also improved.

According to the fifth embodiment, the film is pressed against the pressure plate side in an appropriate balance with a minimum pressing means from the gate entry slot where the inclination of the aperture opening surface of the film easily occurs to the aperture optical axis. Therefore, the flatness of the film and the adhesion of the film to the magnetic head can be easily achieved.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment.

FIG. 2 is a transverse sectional view of the first embodiment.

FIG. 3 is a vertical sectional view (A to C) of the first embodiment.

FIG. 4 is an exploded perspective view of the second embodiment.

FIG. 5 is a cross sectional view of the second embodiment.

FIG. 6 is a vertical sectional view (AC) of the second embodiment.

FIG. 7 is an exploded perspective view of a third embodiment.

FIG. 8 is a cross sectional view of the third embodiment.

FIG. 9 is a vertical sectional view (A to C) of the third embodiment.

FIG. 10 is an exploded perspective view of the fourth embodiment.

FIG. 11 is a transverse sectional view of the fourth embodiment.

FIG. 12 is a vertical sectional view (A to D) of the fourth embodiment.

FIG. 13 is an exploded perspective view of the fifth embodiment.

FIG. 14 is a cross sectional view of the fifth embodiment.

FIG. 15 is a vertical sectional view (A to D) of the fifth embodiment.

FIG. 16 is a perspective view of the disclosed film cartridge.

FIG. 17 is an exploded perspective view of a conventional film feeding device.

FIG. 18 is a cross-sectional view of a conventional film feeding device.

FIG. 19 is a vertical sectional view of a conventional film feeding device (A to FIG.
E).

[Explanation of symbols]

1 body 1a Inner rail 1b aperture 1, 1c outer rail 1d film winding room 1e Inner rail cart room side end surface 1f Inner rail film winding chamber side end surface 1g, 1h, 1i, 1j Film correction convex part 2 Film winding chamber cover 3 Film feeding motor 4 pinion gear 5 film winding spool 6 fork gear 7 cartridges 8 Film pressing member 9 Pressure plate 10 films 11 Photography means 12 magnetic head 13, 17 pads 14, 18 Elastic member 15, 16 Film correction convex member

Claims (9)

[Claims] 1. A magnetic head for recording or reading magnetic information on a film, a pressing means for pressing the film against the magnetic head, a cartridge chamber and a film winding chamber. It is placed in between and feeds the film in the direction perpendicular to the aperture optical axis,
A camera provided with a pressure plate surface and a film gate section consisting of an aperture surface, comprising a correction means for correcting the deformation of the film with respect to a surface perpendicular to the aperture optical axis direction by the pressing means. 2. The pressing means presses the film in the direction of the magnetic head arranged on the pressure plate side, and the correcting means forms a convex portion projecting from the aperture side of the film gate portion to the film side. The camera according to claim 1, wherein the film is corrected so that the film is along the pressure plate surface. 3. The camera according to claim 2, wherein the correction unit is arranged at least one of immediately before and after in the film feeding direction with respect to the pressing unit, and holds the film together with the magnetic head. . 4. The camera according to claim 2, wherein the correction means is disposed between the gate entrance of the film gate section and the aperture optical axis. 5. The correcting means is arranged at a plurality of positions between a gate entrance of the film gate section and an aperture optical axis, and between an aperture optical axis and a film winding chamber. The camera according to Item 2 or 3. 6. A camera having a rectangular aperture whose longitudinal direction is in the film feeding direction, wherein the correction means projects from the aperture side to the film side, and the upstream side in the film feeding direction across the aperture and The camera according to claim 5, wherein the camera is arranged at least at two positions on the downstream side, and is arranged in the vicinity of a side portion of the aperture opening which is perpendicular to the film feeding direction. 7. The camera according to claim 1, wherein the pressure plate surface facing the correction means has a concave portion different from the most adjacent surface of the film. 8. A magnetic head for recording magnetic information on a film or for reading the recorded magnetic information, and is arranged between the cartridge chamber and the film winding chamber, and is perpendicular to the optical axis of the aperture. Film in various directions,
A film gate portion composed of a pressure plate surface and an aperture surface, a first pressing means for pressing the film against the magnetic head arranged on the pressure plate surface side, and a second pressing means for pressing the film against the pressure plate surface are provided. A camera, wherein at least one of the first pressing unit and the second pressing unit is disposed between a gate entrance of the film gate unit and an aperture optical axis. 9. The first pressing means or the second pressing means arranged between the gate entrance and the optical axis of the aperture are dispersedly arranged in the vicinity of a corner of the rectangular aperture opening. The camera according to claim 8, wherein the camera is provided.