JPH06289501A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To attain a good contact between a head and a film by placing the abutting section of the supporter to the film behind the magnetic head rather than at the gap of the head. CONSTITUTION:Rollers 601 and 602 are placed against a magnetic head 101 and rotate in accordance with the traveling of a film F. However the contacting position to the film F is placed behind the head 101 rather than at the gap located at the tip of the head 101. Having this configuration, the film F, which is held between the two rollers 601 and 602 and the head 101, is slightly deformed, moves along the surface of the head 101 and keeps a contact by the elasticity of the film F while it moves. Therefore, a proper head touching pressure is obtained. Since the film F moves along the curved surface of the head, no separation between the gap and the magnetic surface occurs even when the gap position shifts forward or backwards.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head supporting device for recording / reproducing information on / from a magnetic layer of a photographic film having a magnetic layer.

[0002]

2. Description of the Related Art At present, the performance of individual devices, such as films, cameras, and processors, which make up a photographic system, has been remarkably improved, but since the information exchange between the devices is insufficient, the performance of the system is further improved. It is difficult to improve and reduce costs. For example, the current color printing system estimates the shooting condition from the optical density of the developed negative image to determine the printing conditions, and finishes the printing to satisfy the maximum number of customers. For this reason, the finish is average, and the shooting situation and the shooting intention are not sufficiently reflected in the print, and the performance of the film or the camera cannot be fully brought out. Therefore, in order to sufficiently respond to the user's request, it is necessary to print by taking the photographing information into consideration. or,
Since the post-processing of the film is performed in a dark room or underwater, it is difficult to transmit information and it is difficult to automate it by a computer.

As a means for easily exchanging information in a photographic system, a system in which a substantially transparent magnetic recording layer is provided on the entire back surface of the film and necessary information is directly recorded on the magnetic layer of the film is an international application WO-90. / 04205, WO-90 / 04214,
Proposed in US Pat. Nos. 4,965,627 and 4,975,732. That is, the manufacturer name, film type, emulsion lot, sensitivity, manufacturing date, reference signal, etc. are recorded at the time of film production, and shooting conditions such as color temperature of light source, subject brightness, exposure time, aperture value, backlight are recorded. Presence / absence, presence / absence of flash emission, presence / absence of continuous shooting, camera type, owner ID, date of photography, memo of photographer, etc. are recorded for each frame. Furthermore, DP
E At the reception desk, the customer's order information such as print size, number of prints, desired finish (silk, gloss) is recorded on the film. At the time of printing, these pieces of information are read from the film, and the printing conditions are determined together with the optical density data obtained by scanning the negative. As a result, it is possible to obtain a print that reflects the shooting situation and shooting intention. Also,
If this exposure condition is recorded on each frame and is read out and printed at the time of additional printing, a print with the same color tone as that at the beginning can be obtained. In this way, since various pieces of photographic information can be magnetically recorded directly on each frame of the film, automatic management by a computer becomes possible, and many advantages such as cost reduction, quality improvement, quick processing, service management, etc. can be expected. The feature of this system is that the film and information can be perfectly matched by directly recording on the film, and the signal modulation method that is insensitive to the fluctuation of the film transport speed is adopted to unify the film transport speed between the devices. Even without doing so, information can be easily exchanged.

As means for recording information other than images on the film, methods other than magnetic recording, for example, electrical and optical means can be considered. The electrical means using an IC memory or the like has a high cost, and the optical means using an LED or the like has a drawback in that it has a small storage capacity and cannot be rewritten.
The method of magnetic recording directly on the film is most suitable as a means of low cost, high recording density, freely rewritable, perfect correspondence between images and information, and easy information exchange.

[0005]

Generally, magnetic recording is
A signal current is passed through a coil of a magnetic head (hereinafter referred to as a head), and a magnetic field generated is magnetized to record a magnetic layer. For reproduction, the magnetic flux leaking from the surface of the magnetic layer is picked up by the head coil. The leakage flux generated from the head gap and the surface of the magnetic layer is very small, and the reaching distance is also very short, so the contact between the head and the magnetic layer is poor, and even if there is a small space between them, the reproduction output and S / N ratio will be low. It is a fatal error if it drops significantly and a part of the signal is missing. Therefore, the surface contact between the medium surface and the head surface is important. In magnetic recording, tracks are provided on a recording medium and signals are recorded there. If the head cannot trace this track accurately, the reproduction output and the S / N ratio will drop significantly, so tracking is important. Further, in magnetic recording, the medium is magnetized by the leakage flux in the gap of the recording head, and the gap of the reproducing head picks up the leakage flux of the medium. Therefore, the angles of the head gaps used for recording and reproduction must match. Even if the angle difference is about 1 degree, the reproduction output is greatly reduced. This is called azimuth loss, and this prevention is important. Generally, a magnetic recording medium is filled with a magnetic material at a high density. This is because the reproduction output and S / N depend on the filling amount. Furthermore, in magnetic recording, the traveling speed and traveling position of the medium are strictly defined, which is an essential requirement for magnetic recording. In contrast, the method of magnetic recording directly on the film of the present invention is significantly different from conventional magnetic recording. For example, in a photographic processing device, it is not necessary to perform strict traveling speed control and traveling position control like a magnetic recording device. Furthermore, in order to ensure the transparency of the film, the magnetic layer provided on the film should contain 1/50 of the amount of magnetic material used in ordinary magnetic recording media.
Limited to about 1/100. Therefore, the reproduction signal strength from the film is extremely low. An ordinary magnetic recording medium filled with a large amount of magnetic material such as a video tape has a high reproduction output, so that even a small amount of head touch failure, tracking error, azimuth loss or the like has little effect. However, since the output of the transparent magnetic layer is 1/50 to 1/100 of that of ordinary magnetic recording media,
Signals are likely to be lost due to poor head touch, tracking error, azimuth loss, etc., which is likely to cause a fatal error. As described above, in recording / reproducing on / from the transparent magnetic layer, it is important to prevent head touch failure, tracking failure, azimuth loss and the like. However, since the film is stronger and more curled and curled than magnetic tapes, head touch defects, tracking errors, azimuth loss, etc. are likely to occur. Further, the photo processing device has far lower running accuracy than the magnetic recording device, and is prone to tracking errors and azimuth loss. As described above, recording / reproducing on / from the transparent magnetic layer of the film involves a technically difficult problem as compared with the related art.

Hereinafter, the conventional magnetic recording will be compared with the magnetic recording on the film having a substantially transparent magnetic layer in the present invention, and the problems in recording and reproducing on the magnetic layer provided on the film will be described. The transparent magnetic layer is extremely thin (1 μm or less,
Since the ratio of the magnetic layer is low, the physical properties will be described as substantially the same as those of the photographic film.

In general, magnetic tape is composed of a thin support and a particularly soft binder such as polyurethane in order to obtain good contact between the head and the tape.

On the other hand, in the film, since the support is 5 to 10 times thicker than the tape and the photographic emulsion layer is dispersed and coated in an aqueous system, the binder used is limited to a water-soluble resin which is hard and poor in flexibility. . For this reason, the film is much stiffer and less flexible than the tape. Further, the film comprises dozens of layers such as an undercoat layer, a photosensitive layer and a protective layer on a support, and is extremely complicated as compared with a magnetic tape. Although an anti-curl layer is provided on the opposite side of the support, it significantly curls when the balance between the layers is lost. Furthermore, when silver is removed during development, the physical properties change, especially the strength of the waist and the curl change significantly. In addition, since the wet and dry processes are performed, curling occurs depending on the degree of drying, and the degree of curling easily changes due to fluctuations in temperature and humidity. The film not only has a strong curl in the width direction but also has a strong curl in the longitudinal direction, and these are combined to cause irregular distortion.

The transparent magnetic layer is provided on the entire surface of the film, and the entire surface can be recorded. However, it is preferable to record outside the screen within 5 mm from both ends of the film. Since magnetic recording has a high recording density, sufficient recording can be performed in this area. In general, a photographic film is curled inward in the widthwise direction with the emulsion surface being inwardly curled, and in particular, the curl at the edge portion is severe. Therefore, it is difficult to obtain a good head touch in a place where the curl of the edge portion is particularly strong.

A so-called magnetic film provided with a magnetic layer on the same support as the photographic film is used for sound recording of movies. This is also strong and has poor head touch, but is not restricted by the amount of the magnetic agent used, and a good S / N ratio is obtained by using the magnetic material in an amount several times that of an ordinary magnetic tape. Therefore, the output is high and a slight head touch defect does not matter.

As described above, the magnetic recording on the film having the transparent magnetic layer has a problem that is far more difficult than the conventional magnetic recording. The present invention solves these problems with a novel magnetic head support device.

Regarding the head support device for photographic film, US Pat. These are two film guides with a head attached, sandwiching both ends of the film, and the head unit as a whole moves in an arc according to changes in the film angle, combining a number of bearings so that the head can follow irregular film edges. It has a different structure. These inventions deal with the track shift due to the irregularity of the film edge.

On the other hand, the present invention deals with curl, distortion, etc. of the film, and also deals with edge defects, splice defects, angle variations, etc., and irregularities in the reference edge. It is also possible to deal with running defects such as meandering and rampage. Structurally, since many leaf springs are used, it also has the effect of softening the impact coming from the film unlike the bearing.

There are many problems that cannot be solved by the prior art in recording / reproducing on / from a film having a transparent magnetic layer. For example, a method of obtaining a good head touch along a head surface on which a magnetic recording medium is fixed is widely used as a standard method of magnetic recording technology, but it is difficult to apply it to a stiff and hard film. If you press the head strongly against the film,
It is possible to have a film with strong curl along the head, but the signal is not stable and scratches on the film by the head cannot be avoided. Since the transparent magnetic layer is provided on the entire surface of the film and can be recorded in the image area, scratches on the film are fatal defects. Further, when the head is brought into strong contact with a stiff and hard film, the head is abraded severely. Poor contact between the head and the film also causes various types of modulation noise. Since the low level reproduction signal is amplified by the high gain amplifier, these noises are highly amplified and the signal quality is significantly deteriorated.

The inventors of the present invention combined a head with a support facing the head, bend the film along the surface of the head, and utilize the elasticity of the film to bring the head into contact with the film, so that a suitable amount for the film is obtained. We succeeded in obtaining a good head touch by obtaining the contact pressure. In addition, we succeeded in obtaining a good and stable head touch by making the head follow the curl of the film. When the head and the film come into contact, the film deforms and follows the head, but at this time the head can also follow the film, so that the head and the film can contact quickly and good contact can be obtained even if the contact pressure is low. It is possible to prevent the film from being scratched and reduce the wear of the head. It has been found that permalloy can be used not only as an expensive material that is hard and difficult to process, such as sendust, but also because it is soft and easy to process, because the head wear is small. Track deviation occurs when the head angle is changed following the curl of the film edge, but by changing the head angle around the track center, the head could follow the film without causing track deviation.

In film magnetic recording, one end of the film is used as a reference edge, and a track is provided at a position separated from the reference edge by a predetermined distance. The position and width of this track are standardized for compatibility. In order to read the magnetic track recorded by the camera with the head of the photo processor, it is necessary that the head mounted on the photo processor, for example, the printer, can trace the track accurately. Since photographic film is harder and thicker than magnetic tape, precise slitting is difficult, and width fluctuations and edge waviness are large. Furthermore, the curl and irregular distortion peculiar to the film are added, and the reference edge is apt to change. In the processing of photographic film, hundreds of films are spliced and one roll is continuously processed. Although they are joined by a splicer, misalignment and bending occur at the joint. Therefore, the reference edge changes rapidly due to the splice. The width of the magnetic track is usually about 1 mm, so if the splice part is misaligned by 1 mm, it will come off the track. Also, when bent and joined, the reference edge gradually moves. Therefore, it is necessary for the head support device to be able to quickly follow these variations in the reference edge. The traveling system of the photographic system has low accuracy and few guides. In addition, since the film travels intermittently during frame feeding, the film violently rolls with a sudden change in speed, which easily causes track deviation and azimuth deviation. The head support must be able to follow these variations.

The present invention solves the tracking problem by providing film guides at the front and rear of the head, which are constantly engaged with the reference edge of the film, and mounting the head on a support member formed integrally with the film guide. In addition, each of the four film guides is movable in the width direction of the film and gives a force to pinch the film, thereby causing a fluctuation in the film width, a lateral shake,
Even if the relative angle between the film and the head fluctuates due to splice defects, etc., the film reference edge and the film guide are constantly in pressure contact, and the entire head unit follows this,
It was possible to prevent the azimuth loss by keeping the head gap and the track angle always constant with respect to the film reference edge.

In magnetic recording technology, it is necessary for the head to be in close contact with the film and follow the track accurately. However, if the head is moved following the fluctuation of the track, the surface angle between the head surface and the film surface may change, a gap is created between the head surface and the film surface, and the signal output decreases, which is extremely significant. In that case, an error will occur.

The present invention relates to a head supporting device in which the surface angle of the head surface with respect to the film surface does not change even if the head position is moved. Even if the positional relationship between the film and the head is largely deviated, the head can quickly follow the film while keeping close surface contact with the film, and the signal is not lost.

Specifically, since the head supporting member is connected by using a box-shaped spring, the head surface always moves horizontally on the film surface.

The present invention relates to a magnetic head supporting device for recording / reproducing on / from both end tracks of a film coated with a transparent magnetic layer. However, both ends of the film have a large curl, and the head and the film are hard to come into good contact with each other. Is.

Another object of the present invention is a head supporting device suitable for magnetic recording on a film piece. In a large-scale photographic processing device, a large amount of film is connected to form one roll, which is wound on a reel and recorded and reproduced while running from reel to reel. Since the processing is carried out at 1, a head supporting device capable of recording and reproducing even one film is required.

In the system in which the film is wound on a reel and run, it is possible to apply tension to the film and maintain good contact between the film and the head. However, in the case of film pieces, it is difficult to apply tension to the film. WO-92 / has a structure to send a film using an endless belt.
03759, JP-A-4-122929 and the like. But,
When the endless belt gets old, the film slips,
Problems such as dirt occur.

In order to bring the film piece into good contact with the head, a technique of pressing the film against the head from the opposite side of the head using a pad, a roller or the like has been disclosed. However, in order to insert the film into the apparatus, it is necessary to lower this member when passing the tip and raise it after passing to press the film to the head. Such an up-and-down mechanism becomes complicated and is not suitable for a camera with a small space. Further, if the pressing pressure is weak, the contact between the head and the film becomes insufficient, and if the pressure is too strong, the film is scratched or running is poor, and adjustment is difficult.

[0025]

SUMMARY OF THE INVENTION According to the present invention, there is provided a magnetic head supporting device for supporting a magnetic head for at least recording or reproducing information on a magnetic layer of a photographic film coated with a magnetic layer, comprising: Supports for supporting the back surface of the film with respect to the magnetic layer are provided in front of and behind the traveling direction of the film so as to face the gap of the magnetic head, and a gap in which the film can travel is provided between the support and the support. A magnetic head supporting device, and a magnetic head supporting device, wherein a contact portion of the supporting body with the film is disposed rearward of the magnetic head with respect to a gap of the magnetic head. Two sets of first supports equipped with a plurality of film guides provided before and after the magnetic head in the traveling direction of the film for guiding the traveling of the film. The materials are arranged symmetrically at approximately the center in the width direction of the film, and are arranged between both ends of the two sets of first support members and between the two sets of first support members. This is achieved by a magnetic head supporting device characterized in that the second supporting member supported by the above is joined by an elastic member.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to FIGS.

FIG. 1 is a plan view of a magnetic head supporting device according to an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a side view of a magnetic head portion, and FIG. 4 is an exploded perspective view of the magnetic head supporting device. And, the top and bottom symmetrical parts are drawn only in the upper part.

Reference numerals 101 and 102 denote magnetic heads, which perform at least either magnetic recording or reproduction by running a film F coated with a transparent magnetic layer on the entire surface thereof.
Are arranged at both ends of the. 111,112 and 113,114
Is a holding member that holds the magnetic heads 101 and 102, and is configured integrally with the magnetic heads 101 and 102. 121,12
2 and 123,124 are holding members 111,
112 and 113, 114 are support arms pivotally attached to the
The other end is fixed to the rising portions of the holding springs 131 and 132. 201 and 202 are first support members, and holding springs 131 and 1 holding the magnetic heads 101 and 102 as described above.
The film guides 211, 212 and 213, 214 for guiding the film F at the left and right ends are rotatably attached to the center by fixing 32 at its center. 301 is in the center and is the first support member 201 and 20.
2nd support member which supports 2, 311, 312, 313 and 314
Is a coupling spring in the shape of a parallelogram (including a square and a rectangle in this figure) in which two opposite sides are parallel to each other.
One parallel side of the coupling springs 311 and 312 is a first support member.
It is connected to the arm portions 201a and 201b of 201, and the other side is connected to the arm portions 301a and 301b of the second support member 301. In addition, one side of the coupling springs 313 and 314 parallel to each other is connected to the first support member 20.
The second support member 3 is connected to the second arm member 202a and 202b, and the other side is connected to the second support member 3a.
It is connected to the arm portions 301c and 301d of 01. 401 is a leaf spring, the center of which is a groove 30 provided in the center of the second support member.
It is inserted into 1e and both ends are fixed to 501 and 502 which are part of the main body of the magnetic head supporting device. Reference numerals 601 and 602 denote rotating rollers, which are arranged so as to face the magnetic heads 101 and 102 and rotate as the film F travels.
The contact position with the magnetic heads 101 and 102 is arranged behind the magnetic heads with respect to the gaps at the tips of the magnetic heads 101 and 102.

Next, the operation of the magnetic head supporting device in this embodiment will be described.

When the film F travels while contacting the magnetic heads 101 and 102, the film sandwiched between the two rollers 601 and 602 and the magnetic head is slightly deformed along the surface of the magnetic head and is held by the film. Since it is elastic and maintains contact with the magnetic head, an appropriate head touch pressure can be obtained. Also, if the film comes into contact with the gap portion at the tip of the magnetic head, normal recording and reproduction can be performed, but if the film is wound and run along the curved surface near the magnetic gap, the gap position may shift back and forth due to manufacturing errors and assembly errors. Good contact can be maintained without separating the gap and the magnetic surface. In addition, when the film is forcedly passed in the advancing direction in the vicinity of the head in such a manner so as to have a winding shape, that is, a wave shape, the curl in the width direction of the film is once linearly extended at that portion. Therefore, even if two or more parallel magnetic gaps are provided in one head, the plurality of gaps can simultaneously ensure good contact with the linear magnetic layer. Since the distance between the head and the roller is sufficiently wider than the film thickness, the film tip can be inserted smoothly,
There is no need to retract the rollers. If necessary, a guide rail or a tunnel-shaped film guide may be provided in a portion other than the roller to facilitate initial insertion. Since the purpose of the roller is simply to deform the film by a constant curvature, the material is not particularly limited, but a metal roller is preferable because it has a large friction with the film and is deteriorated and stained.

Left and right film guides 211, 213 and 212, 214
Are attached to the first support members 201 and 202 so that the distance between them is slightly smaller than the width of the film F.
The film pushes the left and right film guides 211, 212, 213 and 214 against the elasticity of the 2, 313 and 314 and passes through. Therefore, both edges of the film are always left and right film guides 211,
The magnetic heads 101 and 102, which are engaged with 212, 213 and 214 and integrally attached to the first supporting members 201 and 202, can accurately trace the track provided at a certain position from the film edge. Further, the coupling springs 311, 312, 313 and 314 are
The film edge and the film guide are constantly engaged, and the film guides 211, 212, 213 and 214 are made to follow the film width variation and the reference edge variation in parallel to the film running direction. Besides, since the four coupling springs are independent,
It can smoothly follow the meandering of the film in the width direction.

The present invention is characterized in that the magnetic head can follow the curl of the film edge. The structure will be described with reference to FIG. If the head is moved following the curl of the film, there is a risk that it will fall off the track. According to the present invention, the head is inclined in the width direction of the film centering on the center of the track, so that the track does not fall off even if the head angle changes following the curl.

In FIG. 3, as described above, the magnetic head 10
1 is held by a holding member 112, and the holding member 112 is a support arm 1
It is rotatably supported by 121a and 121b at the ends of the arms of 21 and 122. The support arms 121 and 122 have a holding spring 13 at the other end.
Fixed to the rising part of 1 and 132, supporting points 131a and 131b
Can be rotated. Therefore, the magnetic head 101 is a support arm.
The locus is defined by the rotation of 121 and 122.
In the present invention, the extension of the straight line connecting the fulcrum 131a and the shaft 121a and the straight line connecting the fulcrum 131b and the shaft 121b is the magnetic head 101.
Of the film F, that is, at the center of the track of the film F, the head always swings around the center of the track, and the head does not come off the track even if the head follows the curl of the edge. .

FIGS. 5, 6 and 7 show another embodiment of the present invention. In the description of the above embodiments, the case where a plurality of rollers are used as the support for supporting the film running surface has been described. However, even if this part is not necessarily a rotating roller, the friction resistance of the film running is slightly increased, but the film running is slightly increased. A guide rail or a guide tunnel may be provided so that the film can travel along the curved end of the magnetic head with a gap allowing the film to travel.

In FIG. 5, a guide rail 711 is formed by denting the facing portion of the curved surface of the tip of the magnetic head 101 to provide a gap through which the film passes while drawing a curved surface at the tip portion of the head.

FIG. 6 shows an example in which a film passage similar to that of FIG. 5 is formed, but a second guide rail 721 facing the guide rail 711 is provided and the film passage is a tunnel-shaped guide tunnel. The film leading end can be smoothly inserted and passed when the winding end of the film is severe.

FIG. 7 shows an example in which an auxiliary guide member is provided in front of and behind the magnetic head 101 in the film running direction so as to follow the shape of the tip of the magnetic head 101. The tip of the film does not hit the side of the magnetic head 101. You can run the film smoothly.

In the above description, the case of a photographic film with a transparent magnetic layer has been described. However, a method of providing a magnetic recording box (stripe) containing a large amount of opaque magnetic material in a portion near the end face of the film other than the photographic screen. Is known,
It has been used for audio recording of movies. Although using this film complicates the manufacturing process, it goes without saying that the magnetic recording can be reproduced at a high output and the above embodiment can be realized more stably. Therefore, although the description in this case is omitted, those skilled in the art can easily apply the application.

[0039]

As described above, in the magnetic head supporting device of the present invention, the following effects can be realized at a low cost with a simple structure.

Since the film is brought into contact with the magnetic head by utilizing the bending elasticity of the film, an excessive force does not act on the film or the magnetic head, and the magnetic head is less worn. Further, a good head touch can be obtained without applying tension to the film, recording / reproduction can be performed in the form of a film piece, and it can be used in a small-scale apparatus.

Since the gap between the magnetic head and the roller can be set to be sufficiently wider than the film thickness, there is no need to move the roller when inserting the film piece, and the structure is simplified.

Since the film is bent in the vicinity of the magnetic head, most of the curl in the width direction is corrected, and since the magnetic head follows the curl of the film edge, a stable head touch can always be obtained even with a strong curl film. .

When the magnetic head follows, the magnetic head rotates around the center of the track, so that the magnetic gap does not deviate from the track.

When the film is taken up from the traveling direction, the pressure contact force between the head and the magnetic surface of the film can be increased by giving back tension or running resistance on the film sending side. Especially effective.

Since the support member for supporting the magnetic head is connected by the parallelogram connecting spring parallel to the film running direction, the magnetic head is parallel to the film surface in response to disturbances such as meandering of the film and edge fluctuations. The head and film surface are always in engagement. Further, since they are coupled by four parallelogram coupling springs and these act independently of the motion of the film, they can smoothly follow a wide range of disturbance.

[Brief description of drawings]

FIG. 1 is a plan view of a magnetic head support device.

FIG. 2 is a front view of a magnetic head support device.

FIG. 3 is a side view of a magnetic head portion.

FIG. 4 is an exploded perspective view of a magnetic head support device.

FIG. 5 is a diagram in which a guide rail is provided on the magnetic head unit.

FIG. 6 is a diagram in which a guide tunnel is provided in the magnetic head unit.

FIG. 7 is a diagram in which auxiliary guide members are provided in front of and behind the magnetic head.

[Explanation of symbols]

 101,102 Magnetic head 111,112,113,114 Holding member 121,122,123,124 Support arm 131,132 Holding spring 201,202 First supporting member 211,212,213,214 Film guide 301 Second supporting member 311,312,313,314 Coupling spring 401 Leaf spring 601,602 Roller 711 Guide rail 721 Second guide rail 731 Auxiliary guide member

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location G11B 15/60 Q // G03B 15/00 Z G03C 5/14

Claims (9)

[Claims] 1. A magnetic head supporting device for supporting a magnetic head for performing at least recording or reproduction of information on the magnetic layer of a photographic film coated with a magnetic layer, wherein the back surface of the film is opposed to the magnetic layer. Supports provided to face the gap of the magnetic head are provided in front of and behind the traveling direction of the film, and a gap in which the film can travel is maintained between the support and the magnetic head. A magnetic head supporting device, wherein a contact portion of the magnetic head with the film is disposed rearward of the magnetic head from a gap of the magnetic head. 2. The magnetic head support device according to claim 1, wherein the support is a rotating roller provided at a right angle to a traveling direction of the film. 3. The support is a guide rail provided along a traveling direction of the film, and a surface of the guide rail facing the magnetic head is along a convex curved surface in a gap portion of the magnetic head. 2. The magnetic head supporting device according to claim 1, wherein a concave curved surface is formed. 4. A guide tunnel is formed by disposing a second guide rail facing the guide rail with a gap in which the film travels, and a gap portion of the magnetic head protrudes into the guide tunnel. 4. The magnetic head support device according to claim 3, wherein 5. The magnetic head support device according to claim 1, further comprising an auxiliary guide member provided in front of and behind the magnetic head in a traveling direction of the film, the auxiliary guide member having a shape of a tip of the magnetic head. 6. A magnetic head supporting device for supporting a magnetic head for recording or reproducing at least information on a magnetic layer of a photographic film coated with a magnetic layer, comprising: a magnetic head; Two sets of first support members, each of which is provided with a plurality of film guides provided in front of and behind the magnetic head for guiding the traveling of the film, are symmetrically arranged at substantially the center in the width direction of the film. Of the first support member, and a second support member, which is disposed between the two sets of the first support members and is supported by the magnetic head support device, are coupled by elastic members. Head support device. 7. The elastic member is formed into a parallelogram whose two opposite sides are parallel to the running direction of the film, and one side of the two sides different from the two opposite sides is the first supporting member. The magnetic head supporting device according to claim 6, wherein the other one side is connected to the second supporting member. 8. A leaf spring is attached to substantially the center of the second supporting member in the film running direction, and both end portions of the leaf spring are fixed to a fixed portion of the magnetic head supporting device. Magnetic head support device. 9. The magnetic head supporting apparatus according to claim 6, wherein the film guide is rotatably mounted on the first supporting member so as to be rotatable parallel to the traveling direction of the film.