JP2805736B2 - Camera and film tracking device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a magnetic head for transmitting magnetic information to and from a magnetic storage unit of a film, and a film tracking device.

(Background of the Invention) In recent years, a film having a magnetic storage unit has been used, and photographing information such as shutter time, aperture value, and title has been written into the magnetic storage unit using a magnetic head. A camera configured to read is disclosed in U.S. Pat.
It is proposed in 4864332 and others.

In the camera having the above-described configuration, for example, the magnetic storage unit is disposed at a predetermined position in parallel with the longitudinal direction of the film. It is necessary to always accurately position the position (magnetic storage unit). However, since the film runs while undulating in the vertical direction of the screen during feeding, it has the following problems.

1) Since a displacement occurs between the magnetic storage unit provided on the film and the magnetic head, 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 causes the perpendicularity of the magnetic head to decrease in the running direction of the film. .

3) A magnetic head is mounted on a pressure plate which is vertically movable and rotatable with the undulation of the film to improve the above point 2). Was fixed to the pressure plate, so that the pressure plate became heavy, and the response was poor due to sliding resistance and the like, and it was not possible to immediately respond to the undulation of the film. Further, since the shape is complicated, even if it is molded with plastic, it is deformed, and it is disadvantageous in terms of cost to metallize to prevent this.

(Object of the Invention) The present invention has been made in view of the circumstances described above, and a camera and a film that can always write or read magnetic information accurately even if the film swells. It is intended to provide a tracking device.

(Features of the Invention) In order to achieve the above object, the present invention provides a magnetic head for transmitting magnetic information to and from a magnetic storage section of a film, and restricts the position of the film in the optical axis direction at an exposure position A camera and a film follower having a film position restricting means to perform the movement of the film and a holding means for swingably holding the magnetic head independently of the film position restricting means.

1 to 8 show a first embodiment of the present invention. In these figures, 1 is a camera body, 2 is a finder, 3 is a fork, 4 is a patrone room, 5 is a spool chamber, 6 is a pressure plate, 7 is a pressure plate spring, 8 is a guide member, 9 is a guide pin, 10 and 11 are guide springs, 12 is a magnetic head, 13
Is a screw. Reference numeral 14 denotes a film, on which a magnetic storage unit is provided in parallel with the longitudinal direction. 15 is a back cover, 16 is an aperture.

As shown in FIG. 2, the pressure plate 6 has guides 6a and 6b for guiding the upper end in the film width direction, and the guide spring 1
It has two spring hook portions 6c to which one ends of 0 and 11 are hooked, cutout portions 6d and 6e, and pins 6f and 6g to which the pressure plate spring 7 is swaged.

The pressure plate spring has a bent shape as shown in FIG. 4, and is caulked to the pins 6f and 6g of the pressure plate 6 as described above, and its grooves 7a and 7b are provided in the pins 15a and The pressure plate 6 is inserted into the outer rail 1a (see FIG. 5) by spring pressure.

The guide pin 9 is formed integrally with the pressure plate 6. The guide pin 9 has an elongated hole 8 f of the guide member 8 and is stopped by a screw 13. 8f, the guide member 8 is connected to the pressure plate 6
, Can be moved and rotated in the vertical direction.

The guide member 8 includes guide portions 8a and 8b on which the lower portion in the film width direction rides as shown in FIG. 3, an attaching portion 8c to which the magnetic head 12 is attached as shown in FIG. The springs 10 and 11 have spring hooks 8d and 8e on which the other ends of the springs are hooked, and are always urged upward by the guide springs 10 and 11 in FIG.

Incidentally, the pressure plate 6 and the outer rail 1a as shown in FIG. 5, a predetermined distance l ₁ is formed, the gap portion film 14 will be fed.

In the above configuration, when the film 14 does not undulate, the guide member 8 and the pressure plate 6 are in a parallel state as shown in FIG.

When the film 14 undulates to the upper right as shown in FIG. 7, the guide member 8 is moved so that the guide portions 8a and 8b always contact the lower portion in the width direction of the film 14.
Since the film 14 is pulled at 0 and 11, it follows the inclination of the film 14 and inclines at the same angle (θ) as shown in the figure. At this time, since the magnetic head 12 is also fixed to the guide member 8, the magnetic head 12 is similarly inclined, so that the perpendicularity between the magnetic head 12 and (the magnetic storage unit of) the film 14 can be maintained.

FIG. 8 shows a case where the film 14 undulates to the left. In this case as well, the guide member 8 is similarly tilted by the bias of the guide springs 10 and 11 to the extent that the film 14 is tilted. Therefore, the perpendicularity between the magnetic head 12 and the film 14 can be maintained.

FIG. 9 to FIG. 11 show a second embodiment of the present invention, and the same parts as those in the first embodiment are denoted by the same reference numerals.

In these figures, 106 is a pressure plate, 107 is a pressure plate spring, 10
8 is a guide member, 109 is a guide pin, 110 and 111 are guide springs, and 113 is a screw. 115 is a guide member, 116
Is a guide pin, 117 and 118 are guide springs, and 119 is a screw.

The pressure plate 106 has spring hooks 106a, 106c on which one ends of the guide springs 110, 111 are hooked, and the guide springs 117, 1
It has spring hooks 106d and 106b to which one end of the hook 18 is hooked, notches 106e to 106h, and pins 106i and 106j to which the pressure plate spring 107 is swaged.

The guide pin 109 is formed integrally with the pressure plate 106.
8f enters and is stopped by the screw 113, but with the configuration of the circular guide pin 109 and the elongated hole 108f, the guide member 108 can move vertically and rotate with respect to the pressure plate 106. I have.

The guide pin 116 is formed integrally with the pressure plate 106 similarly to the guide pin 109.
The guide member 115 has a long hole 115e therein, and is stopped by a screw 119.However, the guide member 115 moves vertically with respect to the pressure plate 106 by the configuration of the circular guide pin 116 and the long hole 115e. Rotation is possible.

As shown in FIG. 9, the guide member 108 has guide portions 108a and 108b on which the lower portion in the film width direction rides, and spring hook portions 108e and 108d on which the other ends of the guide springs 110 and 111 are hooked. And the guide springs 110, 111
9 is always biased upward in FIG.

As shown in FIG. 9, the guide member 115 includes guide portions 115a and 115b for guiding the upper portion in the film width direction, and a spring hook 1 on which the other ends of the guide springs 117 and 118 are hooked.
15d and 115c, and are always urged downward by the guide springs 110 and 111 in FIG.

In the above configuration, when the film 14 undulates upward as shown in FIG. 10, the guide member 108 is tilted by the amount of tilt of the film 14 by the urging of the guide springs 110 and 111. In addition, the guide member 115 is similarly tilted by the amount of the film 14 tilted by the urging of the guide springs 117 and 118. That is, since the guide members 108 and 115 follow the undulation of the film 14 while sandwiching the film 14, the magnetic head 12 and the film 14 are moved in the same manner as in the first embodiment.
Verticality can be maintained.

FIGS. 12 to 13 show a third embodiment of the present invention, and the same parts as those in the first embodiment are denoted by the same reference numerals.

In these figures, 206 is a pressure plate, 208 is a guide member,
209 is a guide pin, and 220 and 222 are guide springs. Further, 215 and 216 are guide members, 217 and 218 are shafts for rotatably holding the guide members, and 219 and 221 are guide springs. Although the pressure plate spring is not shown in this embodiment, it is attached in the same configuration as that shown in the first and second embodiments.

The pressure plate 206 includes spring hooks 206a and 206b on which one ends of the guide springs 220 and 222 are hooked, and the guide springs 219 and 2 respectively.
21 has spring hook portions 206c and 206d on which one end is hooked, and cutout portions 206e to 206h.

The guide pin 209 is formed integrally with the pressure plate 206, and the guide pin 209 has an elongated hole 208 f of the guide member 208.
However, due to the configuration of the circular guide pin 209 and the elongated hole 208f, the guide member 208 can move up and down and rotate with respect to the pressure plate 206. ing.

As shown in FIG. 12, the guide member 208 has guide portions 208a and 208b on which the lower portion in the film width direction rides, and spring hook portions 208e and 208d on which the other ends of the guide springs 220 and 222 are hooked. And the guide springs 220, 222
12 is always urged upward in FIG.

The guide members 215 and 216 have guide portions 215a and 216a for guiding the upper portion in the film width direction as shown in FIG. The guide springs 219 and 221 constantly urge the guide springs downward in FIG.

In the above configuration, when the film 14 undulates as shown in FIG. 13, the guide member 208 is tilted by the amount of the tilt of the film 14 due to the urging of the guide springs 220 and 222. Further, the guide members 215 and 216 are
The film 14 around the shafts 217 and 218 by the bias of 9,221
Moves following the tilt. Therefore, as in the first and second embodiments, the perpendicularity between the magnetic head 12 and the film 14 can be maintained.

FIGS. 14 to 15 show a fourth embodiment of the present invention, and the same parts as those in the first embodiment are denoted by the same reference numerals.

In these figures, 306 is a pressure plate, 308 is a guide member,
309 is a guide pin provided on the camera body 1 side, 320,322
Is a guide spring. 315 and 316 are guide members, 3
Reference numerals 17,318 denote shafts provided on the camera body 1 side for rotatably holding the guide member, and reference numerals 319,321 denote guide springs. Although a pressure plate spring is not shown in this embodiment, it is mounted in the same configuration as that shown in the first and second embodiments.

The pressure plate 306 includes spring hooks 306a, 306b on which one ends of the guide springs 320, 322 are hooked, and the guide springs 319, 3
21 has spring hook portions 306c and 306d on which one end is hooked, and cutout portions 306e to 306h.

The guide pin 309 is provided on the camera body 1 side as described above.
Slot 308f enters, and will be stopped with screws (not shown), but due to the configuration of the circular guide pin 309 and the slot 308f,
The guide member 308 can move up and down and rotate with respect to the pressure plate 306.

As shown in FIG. 14, the guide member 308 has guide portions 308a and 308b on which the lower portion in the film width direction rides, and spring hook portions 308e and 308d on which the other ends of the guide springs 320 and 322 are hooked. The guide springs 320 and 322
14 is always biased upward in FIG.

The guide members 315, 316 have guide portions 315a, 316a for guiding the upper part in the film width direction, as shown in FIG. In addition, the guide springs 319 and 321 are always biased downward in FIG.

In the above configuration, when the film 14 undulates upward as shown in FIG. 15, the guide member 308 is inclined by the amount of the inclination of the film 14 due to the urging of the guide springs 320 and 322. Further, the guide members 315 and 316 are
With the bias of 9,321, the film 14
Moves following the tilt. Therefore, as in the first and second embodiments, the perpendicularity between the magnetic head 12 and the film 14 can be maintained.

Further, as in this embodiment, the guide members 308, 315, 316 are connected to the guide pins 309 and shafts 317, 318 provided on the camera body 1 side.
By rotatably mounting the pressure plate 306, the shape of the pressure plate 306 can be simplified and can be formed of metal, plastic, or the like. Further, there is an advantage that the moldability and the workability are also good.

According to each of the above embodiments, a guide member that holds the magnetic head and regulates the position of the lower end in the film width direction and a guide member that regulates the position of the upper end in the film width direction are provided. Since the member is configured to be rotatable separately from the pressure plate and perpendicular to the film running direction on a plane parallel to the film surface, the following effects are obtained.

1) The planar relative position of the magnetic head with respect to the film can be maintained in a predetermined state, and the perpendicularity to the running direction of the film can be maintained.

2) Since the guide member that follows the undulation of the film is formed separately from the pressure plate, the followability to the undulation of the film is improved, and the pressure plate can be made into a simple shape, and processing can be performed. And the precision of the pressure plate itself is increased.

Therefore, no misalignment occurs between the magnetic storage part of the film and the magnetic head, and even if the film undulates, accurate writing and reading of information can always be performed, which is extremely practical. Becomes

(Correspondence between Invention and Embodiment) In this embodiment, the magnetic head 12 corresponds to the magnetic head of the present invention, the pressure plate 6 corresponds to the film position regulating means of the present invention, and the guide members 8, 108, 208, 308 correspond to the holding means of the present invention. .

(Effects of the Invention) As described above, according to the present invention, it is possible to provide a camera and a film tracking device that can always write or read magnetic information accurately even if undulation of the film occurs. It is.

[Brief description of the drawings]

FIG. 1 is a rear view of a camera showing a first embodiment of the present invention, FIG. 2 is a perspective view showing the configuration of a pressure plate, a pressure plate spring and a guide member, and FIGS. FIG. 5 is a longitudinal sectional view also showing the structure of the main part, and FIG. 6 is a camera rear view showing the positional relationship of each member when no undulation occurs in the film. FIG. 7, FIG. 7 and FIG. 8 are rear views of the camera showing the positional relationship of the respective members when the film undulates.
FIG. 10 is a rear view of a camera showing a second embodiment of the present invention, FIG. 10 is a rear view of the camera showing the positional relationship of each member when the film undulates, and FIG. FIG. 12 is a longitudinal sectional view for clarifying, FIG. 12 is a camera rear view showing a third embodiment of the present invention, FIG. 13 is a camera rear view showing the positional relationship of each member when the film undulates, FIG. 14 is a rear view of a camera showing a fourth embodiment of the present invention, and FIG. 15 is a rear view of the camera showing a positional relationship of each member when the film undulates. 1 camera body, 6 pressure plate, 7 pressure plate spring, 8
... Guide member, 9 ... Guide pin, 10,11 ... Guide spring, 12 ... Magnetic head, 14 ... Film with magnetic storage part, 106 ... Press plate, 107 ... Press plate spring, 108,115 ... Guide member , 109,116 …… Guide pins, 110,111,117,118 ……
Guide spring, 206: pressure plate, 208, 215, 216: guide member, 209: guide pin, 217, 218: shaft, 219 to 222 ...
Guide spring, 306 ... Press plate, 308,315,316 ... Guide member, 309 ... Guide pin, 317,318 ... Shaft, 319-322 ...
Guide spring

Claims (2)

(57) [Claims] 1. A magnetic head for transmitting magnetic information to and from a magnetic storage section of a film, a film position regulating means for regulating a position of the film in an optical axis direction at an exposure position, and following a movement of the film. And a holding means for swingably holding the magnetic head independently of the film position regulating means. 2. A magnetic head for transmitting magnetic information to and from a magnetic storage section of a film, film position regulating means for regulating a position of the film in an optical axis direction at an exposure position, and following a movement of the film. And a holding means for swingably holding the magnetic head independently of the film position regulating means so as to be capable of being applied.