JPH08129217A - Camera using film with magnetic storage part - Google Patents

Abstract

PURPOSE: To realize stable press-contact between a magnetic head and film by allowing film having a magnetic storage part to stably travel. CONSTITUTION: A film pressing plate 11 to which the magnetic head 12 is attached is provided with guide parts 11a and 11b regulating the position of the film 14 in the width direction. The film pressing plate 11 is fixed in camera main body parts 13a and 13b. The film 14 which is positionally regulated by the guide parts 11a and 11b is pressed to the surface of the film pressing plate 11 by a pressing part 15. The film 14 is brought into press-contact with the magnetic head 12 by a press-contact part 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a film with a magnetic storage unit, which is provided with a magnetic head for writing or reading information by slidingly contacting a magnetic storage unit provided on the film.

[0002]

2. Description of the Related Art In recent years, a film having a magnetic storage unit is used, and shooting information such as shutter speed, aperture value, shooting date, title, etc. is written (recorded) or necessary in this magnetic storage unit. There has been proposed a camera capable of reading out (reproducing) this photographing information according to the above, and further deleting it.

8 and 9 are a top view and a rear view showing a schematic structure of such a camera. 1 is the camera body,
Reference numeral 2 is a lens barrel, 3 is a film cartridge loaded in the camera body 1, and 4 is a film pulled out from the film cartridge 3. As shown in FIG. 9, the film 4 is provided with a magnetic storage section 4b along, for example, the lower side of the image capturing area 4a. 5 is a film guide member that regulates the traveling position of the film 4, 6 is a guide roller,
7 is a film winding spool. 8 is a film pressure plate elastically supported by the camera body 1 by a spring 9;
Is a magnetic head attached to the film pressure plate 8.

In the camera having the above structure, the film 4 fed out from the film cartridge 3 passes between the guide reference surface 5a of the film guide member 5 and the film pressure plate 8, and the film winding spool 7 via the guide roller 6. The film is taken up by and stopped at a predetermined film cueing position. Then, the film 4 is applied by the film pressure plate 8.
Photographed with the undulations removed, after this shooting,
The film 4 is wound up for one frame. During this winding, the magnetic storage unit 4b of the film 4 is moved by the magnetic head 10.
Information is recorded on or reproduced from.

What is mainly used at present as the above-mentioned film 4 has a lead portion of the film 4 protruding from the cartridge 3 before being inserted into the camera body 1. On the other hand, US Pat. No. 4,841,319 is a film with a magnetic storage unit in which the film including the lead portion is completely housed in the cartridge and the cartridge is inserted from the side of the camera body.
It is proposed in the issue.

As described above, the film pressure plate 8 provided with the magnetic head 10 is supported on the back surface of the camera body 1 by the spring 9, and the film pressure plate 8 presses the film 4 against the guide reference surface 5a. Are disclosed in, for example, Japanese Patent Application Laid-Open No. 4-11236 and Japanese Utility Model Laid-Open No. 5-20044.

[0007]

However, since the camera as described above presses the film pressure plate 8 against the guide reference surface 5a by the elastic force of the spring 9, the focus is kept at a fixed position. There was a problem.

First, since the magnetic head 10 is attached to the film pressure plate 8 supported by the spring 9, when the film 4 waviness, the elastic force applied from the film pressure plate 8 to the film 4 is applied. Depending on the location,
The running stability of the film 4 is impaired. Further, in this case, the position of the magnetic head 10 is relatively changed, so that the magnetic head 10 and the film 4 cannot be stably pressed into contact with each other, which may hinder magnetic recording.

Secondly, since the film guide member 5 on the camera body side is provided with a pair of guide portions for restricting the position of the end portion of the film 4 in the width direction, the end portion of the film 4 in the width direction. It was difficult to position the magnetic head 10 so that the magnetic storage portion 4b provided in the vicinity of the portion faces the magnetic head 10.

Thirdly, since the number of parts is increased due to the film pressure plate 8, the spring 9 and the like, many steps are required for assembly and the manufacturing cost is high.

Therefore, an object of the present invention is to provide a camera having a film pressure plate which can always stably run the film, has no difficulty in positioning the guide portion and the magnetic head, and can be assembled with a relatively small number of parts. Is to provide.

[0012]

In order to achieve the above object, the present invention provides a film with a magnetic memory portion, which comprises a magnetic head for writing or reading information by slidingly contacting the magnetic memory portion provided on the film. In a camera to be used, a film pressure plate fixed to the camera body side and a film whose position is regulated by the magnetic head are attached and which has a guide portion that regulates the position of the film in the width direction. Pressing means for pressing against the pressure plate surface of the film pressure plate.

Further, the present invention is a camera using a film with a magnetic storage unit, which comprises a magnetic head for writing or reading information by slidingly contacting a magnetic storage unit provided on the film, and the magnetic head is attached to the camera. A film pressure plate fixed to the camera body side, which has a guide portion that regulates the position of the film in the width direction, and a pressing means that presses the film whose position is regulated by the guide portion against the pressure plate surface of the film pressure plate. A press contact means for pressing a film whose position is regulated by the guide portion to the magnetic head.

In the camera, the pressing means may be an elastic member.

Further, in the camera, the pressing means may be an elastic member.

[0016]

According to the present invention, it has a film pressure plate fixed to the camera body side, and a pressing means for pressing the film whose position is regulated by the guide portion of the film pressure plate against the pressure plate surface of the film pressure plate. Therefore, the film can be stably run regardless of the presence or absence of waviness of the film, and the magnetic head and the film can be stably pressed against each other. Further, since the camera is configured with the pressure plate surface of the film pressure plate as the optical focal plane, it is possible to keep the position of the film light receiving surface constant.

Further, in the case of having a pressure contact means for pressing the film whose position is regulated by the guide portion of the film pressure plate to the magnetic head, the magnetic head and the film can be pressed more stably. . Also, since both the guide section and the magnetic head are provided on the film pressure plate, if the magnetic head is designed to be attached at a predetermined position, it is not necessary to position the magnetic head, and many steps are required for assembly. I don't need it.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

FIG. 1 is a plan view of the film pressure plate according to the first embodiment of the present invention as viewed from the camera body side. In FIG. 1, the pressure plate 11 made of, for example, a synthetic resin is a pressure plate 11
A pair of guide portions 11a and 11b vertically and continuously protruding along the longitudinal direction of the camera, and an attachment seat having an opening for attaching and fixing the pressure plate 11 to the camera body side with a screw (see FIG. 2). 11c to 11f. Since the pressure plate 11 is fixed to the camera body side such as the film guide member 5 shown in FIG. 8, a spring for pressing the pressure plate 11 is not provided. The shape of the guide portions 11a and 11b that regulate the position of the film in the width direction on the film insertion side is beveled so that the film can be easily inserted. At least two guide portions 11a and 11b may be intermittently provided on one side in the longitudinal direction.

A magnetic head 12 for writing or reading photographic information or the like on a film is attached to an opening provided at a position adjacent to the guide portion 11b of the pressure plate 11. The magnetic head 12 is prepositioned with the guide portion 11b as a reference so as to face the magnetic memory portion provided near the end portion in the width direction of the film. Further, since the magnetic head 12 is mounted so that its height can be adjusted with reference to the pressure plate surface that is the surface on which the guide portions 11a and 11b of the pressure plate 11 are provided, its position adjustment is easy.

FIG. 2 is a sectional view taken along line AA when the pressure plate 11 of FIG. 1 is attached to the camera body. In FIG. 2, the pressure plate 11 is mounted on the camera body 13 by screws 17a and 17b screwed into the openings of the mounting seats 11d and 11e.
It is fixed to a and 13b. In addition, another mounting seat 11c,
The same applies to 11f. The end face is the camera body 13
The upper and lower ends in the width direction of the film 14 are in contact with the inner side surfaces of the guide portions 11a and 11b that are in contact with the a and 13b, respectively. It is regulated. Further, the pressing portion 15 presses the film 14 at a position adjacent to the guide portion 11a.
1 is pressed against the pressure plate surface, and the pressure contact portion 16 is the guide portion 1
The film 14 is pressed against the magnetic head 12 at a position adjacent to 1b.

FIG. 3 shows details of the pressing portion 15 when viewed from the direction of the guide portion 11b. The pressing portion 15 includes a leaf spring 18 having elasticity such as metal or synthetic resin, and a fixing portion 19 such as a screw or a pin for fixing the leaf spring 18 to the camera body 13a. The leaf spring 18 is configured to press the film 14 against the pressure plate surface of the pressure plate 11 with a force that does not hinder the loading of the film 14. The tip end 18a of the leaf spring 18 is slightly bent toward the camera body 13a to facilitate loading of the film 14, and has a so-called R shape. As described above, since the pressing portion 15 is configured to press the film 14 against the pressure plate 11, the film 14 always travels stably, and the magnetic head 12 and the film 14 are stably pressed against each other. still,
The pressing portion 15 is not limited to one place, but may be the guide portion 11 for example.
It may be provided at a plurality of positions adjacent to a and 11b.

FIG. 4 shows the details of the pressure contact portion 16 when viewed from the direction of the guide portion 11a. The press contact portion 16 includes a leaf spring 20 having elasticity such as metal or synthetic resin, a pad portion 21 such as felt attached to the central portion of the leaf spring 20, and a screw for fixing the leaf spring 20 to the camera body 13b. It is composed of fixing parts 22a and 22b such as pins and pins. The leaf spring 20 is
The pad portion 21 presses the film 14 with an appropriate force to the magnetic head 1.
It is constituted so as to press-contact with 2. As described above, since the press contact portion 16 is configured to press the film 14 onto the magnetic head 12, the magnetic head 12 and the film 14 are pressed.
And more stable pressure contact. Further, since the film 14 is configured to come into contact with the pad portion 21, the film 14 is not unnecessarily damaged.

In this embodiment, since the camera is constructed with the contact surface of the pressure plate 11 that is in contact with the film 14, which is the pressure plate surface, as the optical focus reference surface, the position of the film light receiving surface can be kept constant. . Further, since both the guide portions 11a and 11b and the magnetic head 12 are provided on the pressure plate 11, if the magnetic head 12 is designed in advance so that the magnetic head 12 is attached with the guide portions 11a and 11b as a reference, the magnetic head 12 can be formed into a film 14a. The magnetic head 12 does not need to be positioned because it is accurately slidably contacted with the magnetic storage unit. It is also possible to configure the pressing portion 15 as shown in FIG. 4 and the pressure contact portion 16 as shown in FIG. In addition, in this embodiment,
An elastic member such as rubber may be used instead of the leaf springs 18 and 20.

In this embodiment, the above-mentioned US Pat. No. 48 is used.
As described in Japanese Patent No. 41319, it is premised that a cartridge in which a film is completely housed is loaded in the camera body. With this configuration, it is not necessary to provide an opening / closing function on the back surface of the camera. It is also possible to use a cartridge having a protruding film lead portion.

Next, a second embodiment of the present invention will be described. FIG. 5 is a side view showing the outline of the film pressure plate according to this embodiment. In the present embodiment, the guide portions 51a and 51b of the pressure plate 51 are each provided with a substantially L-shaped projection, and the guide portion 5
A pressing portion 15 and a pressure contact portion 16 are provided between the film 14 and the portions of 1a and 51b facing the film 14, respectively. The pressing portion 15 and the pressure contact portion 16 in this embodiment
The specific configuration of may be, for example, that shown in FIGS. 3 and 4.

Next, a third embodiment of the present invention will be described. FIG. 6 is a diagram showing details of the film pressure plate of the present embodiment on the magnetic head side. In this embodiment, the guide portion 61b of the pressure plate 61 and the plate spring 68 forming the pressure contact portion are integrally formed by resin molding. The leaf spring 68 is the leaf spring 1 of the first embodiment.
Similar to No. 8, it has an R shape. Since the leaf spring 68 is integrally formed with the guide portion 61b in this manner, the work of fixing the leaf spring 68 to the guide main body portion 13b or the guide portion 61b becomes unnecessary, and the press contact portion can be easily formed.
The leaf spring 68 of this embodiment can also be applied to the pressing portion.

Next, a fourth embodiment of the present invention will be described. FIG. 7 is a diagram showing details of the film pressure plate of this embodiment on the magnetic head side. In the present embodiment, the roller 72, which constitutes the pressure contact portion, rotates the film 14 as the film 14 travels, and presses the film 14 against the magnetic head 12. The roller 72 has a cylindrical shape, for example, a rotating portion 73 made of rubber, and a roller shaft 7 for pivotally supporting the rotating portion 73 on the camera body 13b.
It consists of 4. As the roller 72 rotates as the film 14 travels in this way, the resistance to the feeding of the film 14 can be reduced. Further, the elastic force of the rubber rotating portion 73 causes the magnetic head 1 to move.
2 and the film 14 can be stably pressed against each other. The roller 72 of this embodiment can also be applied to the pressing portion.

[0029]

As described above, according to the present invention,
Since it has a film pressure plate fixed to the camera body side and a pressing means for pressing the film whose position is regulated by the guide portion of the film pressure plate against the pressure plate surface of the film pressure plate, regardless of the presence or absence of undulation of the film. In addition, the film can be stably run and the magnetic head and the film can be stably pressed against each other. Further, since the camera is configured with the pressure plate surface of the film pressure plate as the optical focal plane, it is possible to keep the position of the film light receiving surface constant. Therefore, high-quality photography can be performed.

Further, since the film whose pressure is controlled by the guide portion of the film pressure plate is pressed against the magnetic head, the magnetic head and the film can be pressed more stably. Therefore, it becomes possible to perform good magnetic recording or reproduction. Also, since both the guide section and the magnetic head are provided on the film pressure plate, if the magnetic head is designed to be attached at a predetermined position, it is not necessary to position the magnetic head, and many steps are required for assembly. Since it is not necessary, the manufacturing cost can be kept low.

[Brief description of drawings]

FIG. 1 is a plan view of a film pressure plate according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1 when the film pressure plate is attached to the camera body.

FIG. 3 is an enlarged cross-sectional view of a pressing portion when viewed from a guide portion direction.

FIG. 4 is an enlarged cross-sectional view of a pressure contact portion as viewed from a guide portion direction.

FIG. 5 is a side view of a film pressure plate according to a second embodiment of the present invention.

FIG. 6 is an enlarged sectional view of a magnetic head side of a film pressure plate according to a third embodiment of the invention.

FIG. 7 is an enlarged sectional view of a magnetic head side of a film pressure plate according to a fourth embodiment of the invention.

FIG. 8 is a top view showing a schematic configuration of a camera using a conventional film with a magnetic storage unit.

FIG. 9 is a rear view showing a schematic configuration of a camera using a conventional film with a magnetic storage unit.

[Explanation of symbols]

 11, 51, 61 Film pressure plate 11a, 11b Guide part 51a, 51b Guide part 61b Guide part 12 Magnetic heads 13a, 13b Camera body part 14 Film 15 Pressing part 16 Pressure contact part 18, 20, 68 Leaf spring 21 Pad part 72 Roller

Claims (4)

[Claims] 1. A camera using a film with a magnetic storage unit, comprising a magnetic head for writing or reading information by slidingly contacting a magnetic storage unit provided on the film, wherein the magnetic head is attached and the width of the film is set. A film pressure plate fixed to the camera body side, which has a guide portion for regulating the position in the direction, and a pressing means for pressing the film whose position is regulated by the guide portion against the pressure plate surface of the film pressure plate. A camera using a film with a magnetic storage unit characterized by the above. 2. A camera using a film with a magnetic storage unit, which comprises a magnetic head for writing or reading information by slidingly contacting a magnetic storage unit provided on the film, wherein the magnetic head is attached and the width of the film. A film pressure plate fixed to the camera body side, which has a guide portion that regulates the position in the direction, a pressing means that presses the film whose position is regulated by the guide portion against the pressure plate surface of the film pressure plate, and the guide portion. A camera using a film with a magnetic storage section, comprising: a pressure contact unit for pressing a film whose position is regulated by the magnetic head with the magnetic head. 3. The camera using the film with a magnetic memory section according to claim 1, wherein the pressing means is an elastic member. 4. The camera using the film with a magnetic memory section according to claim 2, wherein the press-contact means is an elastic member.