JP2646501B2 - Camera capable of using film with magnetic storage and film following device applied to photographic film with magnetic storage - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention uses a film with a magnetic storage unit having a magnetic head for writing or reading information to or from a magnetic storage unit provided in the film. The present invention relates to a device such as a camera capable of performing the operation.

(Background of the Invention) In recent years, a film provided with a magnetic storage unit has been used, and photographing information such as shutter time, aperture value, date, title, and the like has been written into the magnetic storage unit by a magnetic head and, if necessary, A camera adapted to display this photographing information has been proposed in US Pat. No. 4,864,332.

However, in the above conventional example, for example, the magnetic storage unit is disposed at a predetermined position parallel to the longitudinal direction of the film, and the magnetic head is always located at the predetermined position on the film in combination with an increase in the amount of information to be written and read. It is necessary to accurately position. However, since the film runs while undulating during feeding, the following problems have occurred.

(1) A positional shift between the magnetic storage part of the film and the magnetic head occurs, so that accurate writing and reading of photographing information cannot be performed.

(2) The magnetic head must be brought into contact with the magnetic storage portion of the film as perpendicularly as possible, but the undulation of the film reduces the perpendicularity of the magnetic head with respect to the running direction of the film.

(Object of the Invention) The present invention has been made in view of the above circumstances, and a magnetic storage unit capable of appropriately writing or reading information from or to a magnetic storage unit of a film by a magnetic head with respect to undulation of a film being fed. An object of the present invention is to provide a camera that can use a film attached thereto.

Also, the present invention is a film tracking device applied to a photographic film with a magnetic storage unit that can appropriately write or read information to or from a magnetic storage unit of the photographic film by a magnetic head in response to undulation of the photographic film during feeding of the photographic film. It is intended to provide a device.

(Features of the Invention) In order to achieve the above object, according to the present invention, a film feeding means for feeding a film from a film cartridge by driving a film feeding means provided on the film cartridge, and a film feeding means for feeding the film from the film cartridge. Film feeding means having a film winding means for winding the film, provided in the film holding means,
A magnetic head for performing at least one of writing and reading of information with respect to a magnetic storage portion of the film, and holding means for swingably holding the film pressing means so that the magnetic head can follow the movement of the film And a camera that can use a film with a magnetic storage section having the following.

According to another aspect of the present invention, there is provided a film feeder for feeding a photographic film from a film cartridge by driving a film feeder provided in the film cartridge, and a photographic film fed by the film feeder. A film feeding means having a film winding means for winding a film, a magnetic head provided in the film pressing means, and for performing at least one of writing and reading of information with respect to a magnetic storage portion of the photographic film, and the magnetic head And a holding means for swingably holding the film holding means so as to follow the movement of the photographic film.

(Embodiment of the Invention) Figs. 1 to 4 show an embodiment of the present invention.
FIG. 1 is a rear view of the camera with the back cover omitted, FIG. 2 is a sectional view of FIG. 1A-A, FIG. 3 is a sectional view of FIG.
The figure is a plan view showing the positional relationship between the pressure plate and the film of the camera shown in FIG.

In these figures, 1 is a camera main body, 2 is a cartridge chamber for storing a film cartridge (not shown), 3 is a fork for film feeding which is engaged with a shaft (not shown) of the film cartridge, and 4 is a film fork. Film spools 5 and 6 for winding are support shafts having both ends fixed to appropriate positions of the camera body 1. The support shafts 5 and 6 are arranged in parallel with each other and perpendicular to the running direction of the film 9. Has been established. The support shafts 5 and 6 in this embodiment
Has a columnar shape with a circular cross section as shown in FIG.

Reference numeral 7 denotes a pressure plate which has a pair of locking portions 7a and 7b on its upper surface (the surface opposite to the surface in contact with the film 9) as shown in FIG.
Is provided. The locking portions 7a and 7b are composed of a vertical portion perpendicular to the pressure plate 7 and a horizontal portion bent outward at a right angle from the vertical portion, have a substantially L-shaped cross section, and project as a whole in the optical axis direction. As shown in FIG. 1, the locking portions 7a and 7b are arranged in an arc shape at a symmetrical position about a substantially central portion of the pressure plate 7 in plan view.

Here, the distance l _{2 of the} outer curved portion of the vertical portion of the locking portions 7a and 7b (second
Is set slightly shorter than the distance l ₁ (see FIG. 1) of the inner curve of the support shafts 5 and 6, and the support shafts 5 and 6 are connected to the vertical portions and the horizontal portions of the locking portions 7a and 7b. And the pressure plate 7 are located in a concave space. Therefore, the pressure plate 7 can move in the vertical direction in FIG. 1 (the direction perpendicular to the running direction of the film 9) with respect to the support shafts 5 and 6, and can rotate about the substantially central portion of the pressure plate 7. ing. As shown in FIG. 2, the horizontal portions of the locking portions 7a and 7b sandwich the support shafts 5 and 6 and regulate the front and rear positions of the pressure plate 7 in the optical axis direction.

Further, the pressure plate 7 has guide members 7c and 7d integrally provided at both lower corners on the back side as shown in FIG. 4, and a magnetic member at a lower position on the back side as shown in FIG. Head 8
Are fixed so that the head gap of the magnetic head 8 is perpendicular to the film running direction.

Reference numerals 10 and 11 denote springs, which are respectively disposed on the cartridge chamber 2 side and the film spool 4 side with the rotation center of the pressure plate 7 interposed therebetween. One end is fixed to the main body, the other end is fixed to the pressure plate 7, and the pressure plate 7 is pulled upward. It is urged to raise. Thereby, the guide members 7c and 7d provided on the pressure plate 7
, So that the positional relationship of the pressure plate 7 with respect to the film 9 is always constant. A magnetic storage unit (not shown) is formed on the surface of the film 9 on the side of the pressure plate 7, and various kinds of information relating to photographing are written (or read) by the magnetic head 8. Reference numeral 12 denotes an outer rail (see FIG. 3), which regulates the upward direction of the film 9.

As shown in FIG. 4, the guide members 7c and 7d are formed with tapered surfaces extending toward the cartridge chamber 2, respectively, so that the film 9 pulled out from a film cartridge (not shown) housed in the cartridge chamber 2 is spring-loaded. The guide members 7c, 7d are pressed down smoothly against the urging forces of 10, 10.

In the above configuration, a back lid (not shown) pivotally attached to one end of the camera body 1 is opened by the photographer, and a film cartridge (not shown) is loaded into the cartridge chamber 2. As such a cartridge,
As shown in JP-A-63-220049, when not in use, all the film pieces including the film leader portion are housed in the cartridge, the cartridge is filled in the camera body 1, the back cover is closed, and the film is fed. The film is fed out of the cartridge only after the driving force is transmitted from the fork 3.

In the state described above, when the film feeding fork 3 is rotated clockwise in FIG. 2 by a motor (not shown), the shaft (not shown) of the film cartridge engaged with the fork 3 rotates in the same direction. I do. Accordingly, the film 9 is sent out of the cartridge, and the leader portion enters the gap between the pressure plate 7 and the camera body 1 in the music. When the film 9 further moves to the right in FIG. 1, the position of the film 9 and the left side of the pressure plate 7 are first regulated by the spring 11 and the guide member 7d, and when the film 9 further moves, the film 9 is moved by the spring 10 and the guide member 7c. And the right side position of the pressure plate 7. On the way, the film 9 is
, The leading end of the magnetic head 8 comes into sliding contact with a magnetic storage unit (not shown) of the film 9 and writing or reading of photographing information becomes possible. Finally film 9
Is wound around the film spool 4. Thereafter, the winding operation of the film 9 is performed only by the rotation of the film spool 4 by a motor (not shown), which is the same as in a known camera.

Even if the film 9 undulates during the film feeding, the pressure plate 7 can move perpendicular to the film running direction with respect to the camera body 1 and can rotate on a plane parallel to the film surface. Since the guide members 7c and 7d of the pressure plate 7 are pressed against the end faces of the film by the springs 10 and 11, it is possible to accurately follow the undulation. At this time, the magnetic head 8 is integral with the pressure plate 7, and the guide members 7 c and 7 d provided on the pressure plate
, The head gap (not shown) of the magnetic head 8 can always be brought into sliding contact with the magnetic storage portion of the film 9 perpendicularly to the film running direction.

FIG. 5 is a rear view of a camera showing another embodiment of the present invention. In FIG. 5, a guide member 7e which comes into sliding contact with the lower end of the film 9 is provided at the lower end of the pressure plate 7 in FIG. The guide member 7e may be, for example, a rib formed by drawing the pressure plate 7 or a separate member may be attached. Note that a tapered surface extending toward the cartridge chamber 2 is formed at the left end of the guide member 7e to facilitate the insertion of the film 9.
In such a configuration, the same effect as in the above-described embodiment can be obtained.

FIG. 6 is a rear view of a camera showing another embodiment of the present invention. In the embodiment shown in FIG. 1 in FIG. 6, both ends of the pressure plate 7 are attached by springs 10 and 11 in a direction in which the pressure plate 7 is pulled up. In this embodiment, the center of the pressure plate 7 is urged by one spring 13. Even with such a configuration, the guide member provided on the pressure plate 7
7c and 7d come into pressure contact with the end face of the film 9, and the positional relationship of the pressure plate 7 with respect to the film 9 is always constant.
In other words, the head gap (not shown) of the magnetic head 8 fixed to the pressure plate 7 can always be brought into sliding contact with the magnetic storage portion of the film 9 perpendicularly to the film running direction.

According to each of the above embodiments, the magnetic head 8 of the pressure plate 7 is fixed, the pressure plate 7 can be moved perpendicularly to the film running direction, and can be rotated on a plane parallel to the film surface. Guide members 7c and 7 for regulating the position of the film 9
d (or 7e) is provided, and the guide member is connected to an elastic member (spring 1).
0, 11 or 13), the distance from the film end surface to the magnetic head 8 can be kept constant, and the distance between the magnetic head 8 (head gap) and the film running direction can be kept constant. It has become possible to maintain the verticality at 90 ° with high accuracy.

(Correspondence between the Invention and the Embodiment) In the above embodiment, the film feeding fork 3 and the film spool 4 are used as the film feeding means of the present invention.
The pressure plate 7 serves as the film holding means of the present invention, and the magnetic head 8
Is the magnetic head of the present invention, the supporting shafts 5, 6 and the locking portions 7a, 7b are the holding means of the present invention, the guide members 7c, 7d or 7e are the positioning means of the present invention, and the springs 10, 11, or 13 are the Each corresponds to the elastic means of the present invention.

(Effects of the Invention) As described above, according to the present invention, a film with a magnetic storage unit that can appropriately write or read information from or to a magnetic storage unit of a film by a magnetic head with respect to undulation of the film during film feeding. It is possible to provide a camera that can use the camera.

Further, according to the present invention, the present invention is applied to a photographic film with a magnetic storage unit which can appropriately write or read information from or to a magnetic storage unit of the photographic film by a magnetic head in response to undulation of the photographic film during feeding of the photographic film. It is possible to provide a film following device.

[Brief description of the drawings]

FIG. 1 is a rear view of a camera showing an embodiment of the present invention, FIG.
FIG. 1 is a sectional view taken along the line AA in FIG. 1, and FIG.
B sectional view, FIG. 4 is a rear view showing the positional relationship between the pressure plate and the film in the camera of FIG. 1, FIG. 5 is a rear view of the camera showing another embodiment of the present invention, and FIG. It is a rear view of the camera which shows another Example. 1 camera body, 2 cartridge chamber, 4 film spool, 5, 6 support shaft, 7 pressure plate, 7c, 7d, 7e
…… Guide member, 8… Magnetic head, 9 …… Film,
10,11,13 …… Spring.

Claims (6)

(57) [Claims] 1. A film feeder comprising: a film feeder for feeding a film from the film cartridge by driving a film feeder provided on the film cartridge; and a film winding means for winding the film fed by the film feeder. Means, a magnetic head provided in the film holding means, for writing and / or reading information to and from the magnetic storage section of the film, and the film holding means so that the magnetic head can follow the movement of the film. A camera capable of using a film with a magnetic storage unit, comprising: holding means for swingably holding the means. 2. The camera according to claim 1, wherein said film pressing means has a positioning means for positioning said magnetic head with respect to said film. . 3. The film according to claim 1, wherein said film holding means has elastic means for causing said magnetic head to follow the movement of said film. A camera that can. 4. A film feeding means for feeding a photographic film from the film cartridge by driving a film feeding means provided on the film cartridge, and a film winding means for winding up the photographic film fed by the film sending means. A magnetic head provided in the film feeding means and the film holding means for performing at least one of writing and reading of information with respect to a magnetic storage portion of the photographic film, and a magnetic head capable of following the movement of the photographic film. A film follower applied to a photographic film with a magnetic storage unit, further comprising a holding means for swingably holding the film pressing means. 5. A film applied to a photographic film with a magnetic storage unit according to claim 4, wherein said film holding means has a positioning means for positioning said magnetic head with respect to said photographic film. Tracking device. 6. The photographic film with a magnetic storage section according to claim 4, wherein said film pressing means has elastic means for causing said magnetic head to follow the movement of said photographic film. Film follower.