JPH08328109A - Camera using recording or regenerating device and film with magnetic memory part - Google Patents

Abstract

PURPOSE: To prevent the top end of a film from being caught by a pressure contact member when the film is pushed out from a film cartridge with a simple structure. CONSTITUTION: A film 9 is pushed out from a film cartridge 8 loading to the cartridge chamber la of a camera body 1 by the rotation of a spool 2, and advanced between a film rail surface 1c and a film pressure plate 4 and wound by the winding spool 3 of a spool chamber 1b. A pad 6 for pressing the magnetic memory part of the film 9 onto a magnetic head 5 is turned and energized by a spring 7, in such a manner that it is turnable around a shaft part 6a, and the clearance on the film advancing side between the pad 6 and the magnetic head 5 is larger than the clearance on the film discharging side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a head for writing or reading information to or from an information storage section provided in an image recording medium, and a pressure contact member for pressing the information storage section of the image recording medium to the head. With a recording / reproducing apparatus, a magnetic head for writing / reading information to / from a magnetic storage unit provided in a film, and a magnetic storage unit provided with a press contact member for pressing the magnetic storage unit of the film to the magnetic head. The present invention relates to a camera using film.

[0002]

2. Description of the Related Art Conventionally, in a film feeding device for a camera, a film front end portion (so-called leader portion) protruding from a film cartridge is engaged with a sprocket or a winding spool of the camera, and the sprocket or the winding film is wound. The film was loaded by driving the spool. However, this type is not only troublesome because the user has to set the leading edge of the film, but if the setting position of the leading edge of the film is incorrect, the film will not load properly, and There is a drawback that the film is exposed and rendered unusable by carelessly pulling the film.

In view of these problems, a new type of film cartridge has been recently developed in US Pat. No. 4,834,306.
Proposed in the issue. This is a type in which the film is discharged from the inside of the cartridge by the rotation of the film spool inside the film cartridge. Or later,
This type is called a thrust type film cartridge.

If this thrust type film cartridge is used, after it is loaded into the camera, the film spool of the film cartridge is rotated by the fork of the camera side to eject the film, and the film is wound until it is wound onto the winding spool on the camera side. Since the film can be taken out and then taken up and fed by the take-up spool, the user does not have to touch the leading edge of the film, and the disadvantages of the prior art are eliminated.

In recent years, a film having a magnetic storage unit has been used, and shooting information such as shutter speed, aperture value, date, title, etc. is written in the magnetic storage unit by a magnetic head, and if necessary, this shooting is performed. A camera designed to read information has been proposed in US Pat. No. 4,864,332 and the like.

Further, a camera in which a magnetic head writes information in a magnetic storage portion of a film only when the film is wound up to the next frame after the film is exposed is disclosed in WO90 /
04203 (PCT / US89 / 04343).

By the way, in the case of writing or reading information to or from a film with a magnetic storage unit as described above with a magnetic head, in order to perform these accurately, the magnetic storage unit of the film and the magnetic head are pressed against each other with a certain pressure, It is necessary to have a structure in which the magnetic head and the magnetic storage section are surely brought into contact with each other. For that purpose, it is necessary to dispose a film pressure contact member such as a pressure pad at a position facing the magnetic head with the film sandwiched therebetween. Cameras that use the film with a magnetic storage unit used in such a configuration as the above-mentioned thrust type film cartridge are described in JP-A-4-271338, JP-A-4-285940 and the like.

[0008]

However, the film pressure contact member is pressed against the magnetic head in advance by an elastic member such as a spring (for example, Japanese Patent Laid-Open No. 4-2713).
38), when the film front end enters between the pressure contact member and the magnetic head due to the push-out operation of the film from the film cartridge, the film front end is caught by the pressure contact member or the magnetic head, and, for example, the film buckles. Therefore, it is impossible to push the film further.

Further, the film pressure contact member or the magnetic head can be moved in the thickness direction of the film by a dedicated motor or the like, and the film leading end passes between the pressure contact member and the magnetic head by the pushing operation of the film from the film cartridge. Up to the pressure contact member or the magnetic head in the thickness direction of the film (for example, JP-A-4-28594).
No. 0) requires a new drive source such as a dedicated motor, the cost is high, and the timing of pressing the film onto the magnetic head is complicated, and the electric circuit is complicated. There is a point.

Therefore, an object of the first invention according to the present application is to prevent the leading edge of the image recording medium from being caught by the pressure contact member or the head when the image recording medium is pushed out from the cartridge with a simple structure. .

Another object of the second and third inventions of the present application is to have a simple structure and prevent the tip of the film from being caught by the pressure contact member or the magnetic head when the film is pushed out of the film cartridge. is there.

Further, an object of a fourth invention according to the present application is to surely bring the magnetic head and the magnetic memory portion of the film into contact with each other by the pressing member while achieving the above object.

[0013]

In order to achieve the above object, the first invention is a head for writing or reading information to or from an information storage section provided in an image recording medium, and the head of the image recording medium. A recording or reproducing apparatus comprising a pressure contact member that presses an information storage unit into contact with the image recording medium and pushes out the image recording medium from a cartridge so as to enter between the head and the pressure contact member. At least one is configured to be rotatable by a rotation axis that is set in a plane direction that is substantially orthogonal to the approach direction of the image recording medium, and the image recording medium between the pressure contact member and the head. At least one of the pressure contact member and the head is rotationally biased so that the gap on the entry side is larger than the gap on the ejection side of the image recording medium. Characterized by comprising the energizing means.

The second invention comprises a magnetic head for writing or reading information to or from a magnetic storage unit provided in the film, and a pressure contact member for pressing the magnetic storage unit of the film to the magnetic head. In a camera using a film with a magnetic memory unit configured to push out the film from a cartridge, enter the film between the magnetic head and the pressure contact member, and wind the film on the side opposite to the film cartridge, At least one of the heads is configured to be rotatable by a rotation axis set in the width direction of the film, and a gap on the film entry side between the pressure contact member and the magnetic head is on the film discharge side. At least one of the pressure contact member and the magnetic head is rotationally biased so as to be larger than the gap. Characterized by comprising biasing means cell.

A third aspect of the present invention includes a magnetic head for writing or reading information to or from a magnetic storage unit provided in the film, and a pressure contact member for pressing the magnetic storage unit of the film to the magnetic head. In a camera that uses a film with a magnetic memory unit configured to push out the film from a cartridge, enter the film between the magnetic head and the pressure contact member, and wind the film on the side opposite to the film cartridge, the pressure contact member is the film. Of the pressure contact member and the magnetic head, the gap on the film entry side is larger than the gap on the film discharge side. It is characterized in that it comprises an urging means for urging the pressure contact member to rotate.

Furthermore, a fourth invention is a camera using the film with a magnetic memory according to the second or third invention, wherein the film contact surface of the pressure contact member corresponds to the film contact surface of the magnetic head. It is characterized in that it is formed by a substantially arcuate concave surface.

In the camera using the film with a magnetic memory according to the second, third or fourth invention,
The pressing member may have a shaft portion as a rotation axis, and the urging means may be constituted by an elastic member provided between the pressing member and the main body fixing portion, and the pressing member may rotate. An elastically deformable flexible hinge portion may be provided as a moving axis, and the flexible hinge portion may be formed in a rotating state in which the gap is generated in advance, and the biasing means may be configured by an elastic restoring function of the flexible hinge portion. .

[0018]

According to the first aspect of the invention, at least one of the pressure contact member and the head is rotationally biased by the biasing means, and the gap between the pressure contact member and the head on the image recording medium entrance side is on the image recording medium discharge side. When the leading edge of the image recording medium enters between the pressure contact member and the head by pushing out the image recording medium from the cartridge, the front edge of the image recording medium abuts on the end surface of the pressure contact member or the head, for example. Buckling of the image recording medium is prevented, and the pushing operation of the image recording medium is reliably performed. Then, when the image recording medium enters between the pressure contact member and the head, at least one of the pressure contact member and the head is rotated by the image recording medium against the biasing means so as to eliminate the gap difference. Therefore, the information storage unit of the image recording medium is pressed against the head by the pressing member.

Further, in the second and third inventions, for example, the pressure contact member is rotationally biased by the biasing means, and the gap between the pressure contact member and the magnetic head on the film entry side is larger than the gap on the film discharge side. Is also big,
When the film front end enters between the pressure contact member and the magnetic head by pushing the film out of the film cartridge, the film front end is prevented from contacting the end face of the pressure contact member and the film is prevented from buckling. The pushing operation is reliably performed. Then, when the film is wound and a tensile force is generated in the film,
The tension of the film causes the pressure contact member to rotate against the biasing means so as to eliminate the difference in the gap, so that the magnetic memory portion of the film is pressed against the magnetic head by the pressure contact member.

Further, in the fourth aspect of the invention, since the film contact surface of the pressure contact member formed by the substantially arcuate concave surface makes the magnetic memory portion of the film closely follow the film contact surface of the magnetic head, The contact between the magnetic head and the magnetic storage portion of the film is more reliably performed.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A camera according to an embodiment of the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment, FIG. 1 is a cross-sectional view showing a schematic structure of a camera, FIG. 2 is a cross-sectional view of a main part showing a pad rotating state, and FIG. 3 is a pad and a magnetic head. And FIG. 4 is a cross-sectional view of the main part showing the pad pressure contact state.

In FIG. 1, 1 is a camera body and 10 is a lens barrel. The camera body 1 has a cartridge chamber 1a.
And film spool spool chamber 1b and film rail surface 1
c and. The thrust type film cartridge 8 described above can be loaded in the cartridge chamber 1a. Reference numeral 2 is a fork, 3 is a film winding spool, and the fork 2 is engaged with the film spool in the film cartridge 8. The fork 2 and the film winding spool 3 are described in JP-A-2-67535 and JP-A-2-6753.
It is rotationally driven by a film feeding mechanism, which is disclosed in, for example, Japanese Patent Publication No. 6, for example, and includes a motor, a driving force transmitting means, and the like.

Reference numeral 4 denotes a film pressure plate, which is attached to the camera body 1 or a camera back cover (not shown) while maintaining a predetermined distance from the film rail surface 1c of the camera body 1. Reference numeral 5 denotes a magnetic head attached to the film pressure plate 4 for writing (recording) or reading (reproducing) information in the magnetic storage portion of the film 9. The magnetic storage portion of the film 9 is provided, for example, below the image capturing area.

Reference numeral 6 denotes a pad as a pressure contact member, which presses the magnetic storage portion of the film 9 against the magnetic head 5. The pad 6 is rotatably attached to the camera body 1 by a shaft portion 6a, and the rotation axis center of the shaft portion 6a is set to match the width direction of the film 9.

Numeral 7 is a tension coil spring as an elastic member constituting an urging means, one end of which is attached to the pad 6 and the other end of which is attached to the camera body 1 or a fixing plate (not shown). The pad 6 is urged to rotate in the direction of arrow a about the shaft 6a by the spring 7. The elastic member may be a compression coil spring that presses the pad 6 to urge it in the same manner, and a rubber member or the like may be used instead of the spring.

As shown in FIG. 2, when the pad 6 is rotated in the direction of arrow a by the spring 7, the right side portion of the film contact surface 6b of the pad 6 is brought into contact with the film contact surface 5a of the magnetic head 5. , Pad 6 is angle θ in the direction of arrow a.
Is inclined at. That is, the film contact surface 6 of the pad 6
The angle between b and the film rail surface 1c is θ.

At this time, the gap between the pad 6 and the magnetic head 5 is the film entrance side, that is, the cartridge chamber 1a.
The gap L1 on the left end side of the pad 6 which is the side and the gap L2 on the film discharge side, that is, the right end side of the pad 6 which is the spool chamber 1b side have a relation of L1> L2.

As shown in FIG. 3, when the film contact surface 6b of the pad 6 is parallel to the film 9, that is, when θ = 0 °, the central portion of the pad 6 and the magnetic head 5 (gap portion). ) Is set to d. On the other hand, the thickness of the film 9 is t. Here, when the d dimension is set to be slightly smaller than the t dimension, the pad 6 is made of an elastic material such as rubber so that the pad 6 can be elastically deformed in the arrow c direction. If it is set, the film 9 having the thickness t is the gap d between the magnetic head 5 and the pad 6.
Can enter in close proximity to.

In the above structure, as shown in FIG.
Film cartridge 8 in the film cartridge chamber 1a
Is loaded, and the film spool is rotated by the fork 2. Then, the film 9 is pushed out from the film cartridge 8, and the film 9 is pushed onto the film rail surface 1.
It advances between the film c and the film pressure plate 4 to the spool chamber 1b side, and is wound around the winding spool 3.

At the time of loading the film, as shown in FIG. 2, when the tip 9a of the film 9 enters between the magnetic head 5 and the pad 6, the pad 6 is inclined in the direction of arrow a at an angle θ. Since the gap on the entry side is expanded to L1, it is possible to prevent the film front end 9a from being caught by the end surface of the pad 6. This allows the film 9 to be pushed out smoothly and reliably.

Subsequently, when the film 9 further advances, as shown in FIG. 4, the leading end 9a of the film enters the contact portion between the pad 6 and the magnetic head 5, so that the pad 6 resists the urging force of the spring 7. Then, it is rotated in the direction of arrow b. Then, when the film tip 9a is wound around the winding spool 3 (FIG. 1) and a tensile force is generated in the film 9, the pad 6 is inclined by 0 ° due to the tension of the film 9, as shown in FIG. The magnetic storage portion of the film 9 is brought into a state of being pressed against the magnetic head 5.

In this way, after the loading of the film 9 is completed, the film 9 is photographed, and after this filming, the film 9 is wound by one frame. At the time of this winding, as shown in FIG. 4, information is recorded or reproduced by the magnetic head 5 in a state in which the magnetic storage portion of the film 9 is reliably pressed against the magnetic head 5 by the pad 6.

When the photographing of all the frames or the desired frame of the film 9 is completed, the film 9 is rewound into the film cartridge 8 by the rotation of the fork 2 in FIG. When the film 9 comes out from between the pad 6 and the magnetic head 5, the pad 6 is again rotated in the direction of the arrow a by the spring 7, and the same operation as described above is performed by loading a new film cartridge 8. Be seen.

Next, FIGS. 5 and 6 show a second embodiment, and FIG. 5 is a cross-sectional view of a main part showing a pad rotating state, FIG.
FIG. 4 is a transverse cross-sectional view of a main part showing a pad pressure contact state. Reference numeral 16 denotes a pad serving as a pressure contact member that presses the magnetic storage portion of the film 9 against the magnetic head 5, and is made of a flexible material such as a rubber material. The pad 16 includes a flexible hinge portion 16a serving as a rotation axis that coincides with the width direction of the film 9, a pad body portion having a film contact surface 16b, and a fixed base portion 16c fixed to the camera body 1. Is molded into. Then, as shown in FIG. 5, the pad 16 is formed in advance in a state of being rotated in the direction of arrow a so that the film contact surface 16b is inclined at an angle θ with respect to the film rail surface 1c. Note that only the flexible hinge portion 16a may be made of a flexible material.

In the second embodiment, as shown in FIG. 5, the pad 16 is normally rotated in the direction of arrow a,
Since the gap on the film entry side is widened to L1, the tip 9a of the film 9 surely enters between the pad 16 and the magnetic head 5 as described above. Then, as shown in FIG. 6, when the film 9 passes between the pad 16 and the magnetic head 5 and a tension is generated, the flexible hinge portion 16a of the pad 16 is bent and rotated in the direction of the arrow b. The contact surface 16b becomes parallel to the film rail surface 1c,
The magnetic storage portion of the film 9 is surely pressed against the magnetic head 5. Then, when the film 9 is rewound, as shown in FIG. 5, the pad 16 is returned to the rotating state in the arrow a direction again by the elastic restoring force of the flexible hinge portion 16a.

As described above, in the second embodiment, the pad 16
The pad 16 itself is provided with the function of a biasing means for biasing the rotation so as to increase the gap on the cartridge chamber 1a side, that is, on the film entry side. That is, in this case, the flexible hinge portion 1 that is elastically deformable by forming the pad 16 with a flexible material
The provision of 6a and the formation of the pad 16 in a rotating state in which the above-mentioned gap is formed correspond to the urging means. Further, according to the second embodiment, the spring 7 in the first embodiment can be eliminated, so that the cost can be reduced by reducing the number of parts and the number of assembling steps.

Next, FIGS. 7 and 8 show a third embodiment, and FIG. 7 is a cross-sectional view of a main portion showing a pad rotating state, FIG.
FIG. 4 is a transverse cross-sectional view of a main part showing a pad pressure contact state. In this embodiment, the shape of the film contact surface 26b of the pad 26 is different from that of the first embodiment. The film contact surface 26b of the pad 26 is a substantially arcuate concave surface corresponding to the film contact surface 5a of the magnetic head 5. That is, the cross-sectional shape of the film contact surface 26b in the plane parallel to the film running direction is a shape in which the central portion is recessed by e as compared with the both ends.

According to the shape of the pad 26, as shown in FIG. 8, when the pad 26 is in a posture of pressing the magnetic storage portion of the film 9 against the magnetic head 5 by the tension of the film 9, the film contact surface of the pad 26 is formed. 26b causes the magnetic storage portion of the film 9 to move to the film contact surface 5a of the magnetic head 5.
Since they are in close contact with each other, the contact can be made more reliably and stably.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various effective modifications, combinations and applications are possible based on the technical idea of the present invention. is there. For example, in the above-mentioned embodiments, the pressure contact member is rotated, but this is such that the magnetic head or both the magnetic head and the pressure contact member is rotated in the same manner as the pressure contact member of the above embodiment. Good. Further, the shape of the film contact surface of the pressure contact member as in the third embodiment can be similarly applied to the pressure contact member as in the second embodiment.

Further, the present invention can be applied to an image recording medium other than a film. The present invention also provides
The present invention can be applied to a cartridge of a type other than the cartridge described in the embodiment or a cartridge having an image recording medium other than a film. The present invention can also be applied to a device that performs writing or reading by a method other than magnetism such as optical. Further, the present invention is applied to various forms of cameras such as a single-lens reflex camera, a lens shutter camera, a video camera, optical devices other than the camera, and other devices, and further these cameras, optical devices, and other devices. The present invention can also be applied to a device or an element that constitutes them.

[0041]

As described above, according to the first invention, when the leading edge of the image recording medium enters between the pressure contact member and the head by pushing the image recording medium out of the cartridge, the leading edge of the image recording medium is pushed. The image recording medium can be smoothly passed without being caught by the pressure contact member or the end surface of the head, and the pushing operation of the image recording medium can be performed extremely reliably. Moreover, the above effect can be achieved with an extremely simple configuration without specially providing a pressure contact member or a complicated moving mechanism of the head.

According to the second and third inventions, when the tip of the film enters between the pressure contact member and the magnetic head by pushing the film out of the film cartridge,
It is possible to smoothly pass the film without the tip of the film being caught on the end face of the pressure contact member, and the extruding operation of the film can be performed very reliably.
Moreover, the above effect can be achieved with a very simple configuration without specially providing a pressure contact member or a complicated moving mechanism of the magnetic head.

Further, according to the fourth aspect of the invention, in addition to the above effects, the contact between the magnetic head and the magnetic memory portion of the film can be made more reliably and stably.

[Brief description of drawings]

FIG. 1 is a transverse sectional view showing a schematic configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is a transverse cross-sectional view of a main part showing a pad rotating state in the above embodiment.

FIG. 3 is a cross-sectional view of a main part showing a relationship between a pad and a magnetic head in the above embodiment.

FIG. 4 is a transverse cross-sectional view of a main part showing a pad pressure contact state in the above embodiment.

FIG. 5 is a lateral cross-sectional view of a main part showing a pad rotating state in the second embodiment of the present invention.

FIG. 6 is a transverse cross-sectional view of a main part showing a pad pressure contact state in the above embodiment.

FIG. 7 is a transverse cross-sectional view of a main part showing a pad rotating state in the third embodiment of the present invention.

FIG. 8 is a transverse cross-sectional view of a main part showing a pad pressure contact state in the above embodiment.

[Explanation of symbols]

 1 Camera Main Body 1a Cartridge Chamber 1b Spool Chamber 1c Film Rail Surface 2 Fork 3 Winding Spool 4 Film Pressure Plate 5 Magnetic Heads 6, 16, 26 Pads (Pressing Contact Members) 6a, 26a Shaft Part 16a Flexible Hinge Parts 6b, 16b, 26b Film contact surface 7 Spring (biasing means) 8 Film cartridge 9 Film with magnetic storage unit 9a Film tip

Claims (6)

[Claims] 1. A head for writing or reading information to or from an information storage section provided in an image recording medium, and a pressure contact member for pressing the information storage section of the image recording medium into pressure contact with the head, and the image recording from the cartridge. In a recording or reproducing apparatus configured to push out a medium to enter between the head and the pressure contact member, at least one of the pressure contact member and the head is substantially orthogonal to an approach direction of the image recording medium. In addition to being configured to be rotatable by the rotation axis set in the plane direction,
Biasing means for rotating and biasing at least one of the pressure contact member and the head such that the gap between the pressure contact member and the head on the image recording medium entrance side is larger than the gap on the image recording medium discharge side. A recording or reproducing apparatus comprising: 2. An extruding film from a film cartridge, comprising a magnetic head for writing and reading information to and from a magnetic storage portion provided on the film, and a press contact member for pressing the magnetic storage portion of the film to the magnetic head. In the camera configured to enter between the magnetic head and the pressure contact member and be wound on the side opposite to the film cartridge, at least one of the pressure contact member and the magnetic head is
It is configured to be rotatable by a rotation axis set in the width direction of the film, and a gap between the pressure contact member and the magnetic head on the film entry side is larger than a gap on the film discharge side. A camera using a film with a magnetic storage section, further comprising: a biasing unit that biases at least one of the pressure contact member and the magnetic head. 3. A magnetic head for writing or reading information to or from a magnetic storage unit provided in a film, and a press-contact member for pressing the magnetic storage unit of the film to the magnetic head, and the film is extruded from a film cartridge. In a camera configured to be inserted between the magnetic head and the pressure contact member and wound on the side opposite to the film cartridge, the pressure contact member is rotated by a rotation axis set in the width direction of the film. And a biasing means for urging the pressure contact member so that the gap on the film entry side between the pressure contact member and the magnetic head is larger than the gap on the film discharge side. A camera that uses a film with a magnetic storage unit. 4. The camera according to claim 2, wherein the film contact surface of the press contact member is formed as a substantially arcuate concave surface corresponding to the film contact surface of the magnetic head. A camera that uses a film with a magnetic storage unit. 5. The camera according to claim 2, 3 or 4, wherein the pressure contact member has a shaft portion as a rotation axis, and the biasing means is provided between the pressure contact member and the main body fixing portion. A camera using a film with a magnetic storage section, characterized by comprising an elastic member. 6. The camera according to claim 2, 3 or 4, wherein the pressure contact member has a flexible hinge portion that is elastically deformable as a rotation axis and is formed in a rotation state in which the gap is generated in advance. A camera using a film with a magnetic storage portion, wherein the biasing means is constituted by an elastic restoring function of the flexible hinge portion.