JPH03200130A - Magnetic recording device for camera - Google Patents

Abstract

PURPOSE:To prevent a magnetic head from becoming an obstacle and to surely feed a film by locking and positioning a magnetic head facing to a film surface at a retreat position in the case of automatic loading and sensing that the film passes the part of the magnetic head and advances toward a take-up spool side, thereby releasing the locking. CONSTITUTION:The magnetic head 10 for magnetic recording which is diposed at a part close to an aperture 3 on the way of a film path so that it can freely move forward and backward from a direction orthogonally crossed with the film surface and a locking means 23 which locks the movement of the magnetic head 10 in a direction where the head 10 press-contacts with the film surface at the retreat position are provided. Then, sensing means 20 and 21 which sense the leading edge of the film, release the locking state by the locking means 23 and allow the magnetic head 10 to press-contact with the film surface are provided on the film path between the magnetic head 10 and the take-up spool. Thus, there is no fear of the occurrence of a trouble that the magnetic head 10 hinders the film from advancing in feeding the film 2 in the case of using the film cartridge of such a type that the film is fed from the cartridge 1.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a magnetic field in a still camera that magnetically records various photographic information such as exposure conditions at the time of photographing on the film surface F using a magnetic head for magnetic recording. Q Regarding the equipment,
This invention relates to a magnetic head movable mechanism for previously retracting the magnetic head from a position where it is pressed against the film surface during automatic loading in which the film is sent out from the film cartridge to the winding Lisbourg side and wound.

[Conventional technology]

For example, in a cine camera such as 81, etc., it is common practice to magnetically record surrounding sweating sounds and the like during photographing.

In such a cine camera, the image capturing part is film-based because of the device configuration, such as the moving image and the mechanical arrangement conditions of the image capturing section corresponding to the photographing optical system and the recording Vf section. and a recording portion corresponding to the image are located apart in the film running direction. Therefore, in a cine camera, it is best to consider image capture on the film screen and magnetic recording completely separately, and the arrangement of each part is relatively simple, and there is no mutual interference between both mechanical parts. No consideration is required at all, and stable film image shooting and blind spot recording can be performed.

By the way, it is conceivable to apply such a method of magnetically recording information on film to still cameras and the like. In this case, the information to be recorded includes photographic information such as exposure, aperture, film sensitivity conditions, date and time of photographing, and trimming information when printing the photographed screen.

If this information is recorded on the film surface at the time of shooting, this information can be read at a photo lab, etc., and the exposure conditions for printing can be set according to the conditions at the time of shooting, giving an exposure of W for each frame. You can use a telephoto lens even if the focal length of the camera's photographic lens is limited, to improve the quality of printed photographs, or to take pictures with the premise of enlarging a part of the screen in advance. This makes it possible to obtain printed photographs that look like the original, and to assist the photographic function.

For this reason, even in this type of still camera, a magnetic material is provided on the film side as a magnetic information recording section, and
It is conceivable that a magnetic recording device using a magnetic head or the like for magnetically recording information on the magnetic material be attached to the camera.

[Problem to be solved by the invention]

However, when configuring such a magnetic recording device for a still camera, practical problems arise due to the relationship with a film feeding device and the like. Namely.

For still cameras, the image is 4M like a cine camera.
There is little space to separate the shadow area from the audio recording area, and after development and printing, the negative is generally cut to an appropriate length. Providing information records on or near the side edges as close as possible to both sides of the photographed surface reduces the handling of film pieces, the space for mechanical parts within the camera, and the overall compactness of the camera. This will be advantageous in terms of planning. For this purpose, a magnetic information recording section is provided close to the photographing screen of the film, and a magnetic head for recording information in this magnetic information recording section is placed close to the film path facing seven sides of the camera body so that the film surface It is conceivable to provide it so as to be pressed against it from a direction perpendicular to the direction.

By the way, for example, U.S. Patent No. 4,832,275, U.S. Patent No. 4,834,308, or Jitsuma I! /158-67329, etc., discloses a cylindrical part in which a spool shaft for storing photographic film in a rolled state is installed, and a cylindrical part that extends in the tangential direction of the spool shaft so that the leading end of the film is in a straight line. A film cartridge structure is disclosed, which includes a film feeding section and a film cartridge storing section. In such cartridges, the leading edge of the film is usually housed in the feeding section so that it is not exposed to the outside, and when loaded into the camera, the film perforations are removed from the opening formed in the spool shaft or part of the feeding section. The leading edge of the film is sequentially fed out from the hatrone feeding port by driving a sprocket etc. that mesh with the camera side by the drive system on the camera side.

By using a film cartridge with such a configuration and loading it into the cartridge chamber formed on one side of the camera body, the drive system inside the camera sequentially feeds out the film and winds it around the take-up spool. When trying to develop an automatic loading type still camera, the existence of the above-mentioned magnetic head becomes a problem. In other words, when the film is sent out to the winding Lisbourg side using only the extrusion force from the cartridge side during automatic loading, the leading edge of the film overcomes the pressing force of the magnetic head in the direction of the film surface, passes through this part, and advances. However, compared to the case where the tip of the film is wound around the spool in advance and the film is pulled out by the rotational force on the spool side, as in the case of a film cartridge for boat fishing, the above-mentioned type of film cartridge structure is , it is necessary for the film to pass through the magnetic head section using only the extrusion force from the cartridge side, and the pressing force of this magnetic head is also quite large, so the extrusion force for the film must be greater than is safe. In addition, even if the extrusion force of the film is increased in this way, there is a risk that the leading edge of the film will become caught in the magnetism and buckle and stop advancing. It is necessary to do so.

[Means to solve the problem]

In order to meet the above-mentioned need 1, the magnetic recording device of the camera according to the present invention has a magnetic recording device in the middle of the film path through which the film is sent out from the cartridge loaded on the - side of the camera body and headed for the take-up spool side. A magnetic head for magnetic recording is disposed near the aperture so that it can move forward and backward in a direction perpendicular to the film surface, and a member that controls the movement of the magnetic head in the direction of pressure contact with the film surface at a retracted position. A locking means is provided in the film path between the magnetic head and the take-up spool to sense the leading edge of the film, release the locking state by the locking means, and press the 6t1% head against the film surface. The sensor is configured to include a sensing means.

[Effect]

According to the present invention, in an automatic loading device, etc., in which a film is fed from a cartridge loaded on one side of a camera body, passes through a film path facing an aperture, and is wound onto a take-up spool on the other side of the camera body. The magnetic head facing the film surface in a portion close to the aperture is locked and positioned at the leaving position by the locking means, and the sensing means detects when the film has passed through the magnetic head portion toward the take-up spool. By sensing this, the locking means 1F is released, and the magnetic head is brought into pressure contact with the film surface to be in a state where magnetic recording is possible. In addition, in this state where magnetic recording is possible, when the film is sequentially taken into the cartridge from the take-up spool side and the leading edge of the film touches the sensing means, this state is sensed and the engaging means is moved to the magnetic head. It becomes possible to lock in position.

[Embodiment] FIGS. 1 to 7 show an embodiment of a magnetic recording device for a camera according to the present invention. In this embodiment, as shown in FIG. 7, a film feeding part 1b extends in a tangential direction from a cylindrical part la having a spool shaft of the film cartridge 1 and accommodates the leading end side of the film in a straight line. , an opening 1c formed with a cutout inside the opening 1c.
A sprocket inside the camera body (not shown) is engaged with the perforation 2a of the film 2 exposed to the
As a result of this rotation, the film 2 is sent out to the winding spool (not shown) through a film passage (not shown) facing the aperture 3 (indicated by the dotted chain line in Fig. 1) of the camera body, and is wound from the tip side. A case will be described in which a film cartridge I having a structure in which the film is wound around the outer periphery of a spool is used, and a film feeding device (not shown) for feeding the film as described above is employed. In FIG. 7, ld is a spline for rotating the spool shaft of the film cartridge 1 in the direction in which the film 2 is wound into the cartridge 1.

FIG. 1 schematically shows the structure of a magnetic head 10 and its movable mechanism 11, which characterize the present invention, and shows a cartridge 1 and a film 2 shown by two-dot chain lines in the figure without being loaded. Furthermore, Figure 2 shows the state in which the cartridge is loaded.

FIG. 3 shows the state when the film 2 is fed out from the loaded cartridge 1.

In these figures, reference numeral 10 is arranged in a portion of the film 2 near the aperture 3 corresponding to the scheduled shooting screen in order to magnetically record recorded information in a magnetic information recording section formed of a magnetic material on the film 2 surface. Magnetism for magnetic recording 7
In the camera body, this magnetic head 10 is attached to a support shaft 12 inside the camera body.
The head holding lever 12 is provided at one end of the head holding lever 12 supported by
IF is set up so that you can leave work. This head holding lever 12 is provided with a biasing means (tension spring 3), which will be described later.
4) provides a rotational force in the direction in which the magnetic helad 10 is brought into pressure contact with the two surfaces of the film.

In addition, 13 in the figure holds the magnetic head lO, and 8-
12, and is fixed with screws 13a, 13a.

Reference numeral 20 denotes a film sensing lever, which is supported by a support shaft 20a so as to be swingable in a direction parallel to the surface direction of the film 2, and is engaged with one side edge in the width direction of the film 2 by a roller holding portion 20b at one end thereof. A sensing roller 21 serving as sensing means for sensing the presence or absence of the film 2 is movably held by a shaft 21a. In addition, this film sensing lever 20
is a bottle 20c installed in a part thereof and a fixed side bottle 22
The sensing roller 21 is biased in the direction in which it faces the traveling path of the film 2, that is, in the counterclockwise direction in the figure, by a tension spring 22 passed between the tension spring 22 and the tension spring 22, and the rotation due to this biasing force is A notch 23 formed at the other end of the head holding lever 12 and serving as a locking means for the head holding lever 12 is a locking piece 14 extending from a part of the head holding lever 12.
In addition to being regulated by being locked in, this notch! !
By engaging portion 23 with engagement piece 14.

Head holding/<-12 magnetic head lO is film 2
Movement in the direction of pressure contact with the surface is stopped at the retracted position. And this film senses 8-20,
The film 2 is sent out from the cartridge 1 side and passes through the magnetic head 1O section, and the edge of the film 2 side touches the sensing roller 2.
By engaging with spring 1 and being pushed down, tension spring 2
The notch 23 rotates clockwise in the figure against the biasing force of the head holding lever 12, and enters the unlocked state in which it is released from the locking piece 14 of the head holding lever 12, and as a result, the head is held.
-12 is configured to rotate counterclockwise in the figure so as to bring the magnetic head IO into pressure contact with the film surface.

Reference numeral 30 denotes a cartridge sensing lever having an arcuate sensing end 30a that senses the loading state of the cartridge 1 into the cartridge chamber (not shown) of the camera body, and is swingably supported by a support shaft 30b, and a portion thereof. Bin 30 planted in
A tension spring 31, which is hooked between C and the fixed side bottle 31a, provides rotational force in the counterclockwise direction in the figure, and the sensing end 30a is normally biased so as to face into the cartridge chamber. . When the cartridge 1 is loaded into the cartridge chamber, the cartridge sensing lever 30
As shown in FIG. 2, it rotates clockwise in the figure against the biasing force of the tension spring 31.

Reference numeral 32 denotes a transmission lever for sensing the cartridge and transmitting the movement of the cartridge 8-30 to the head holding lever 12 side, which is rotatably supported by a support shaft 32a and is connected to the engaging portion 30d of the cartridge sensing lever 30. Engagement part 3 to engage
2b. Further, the transmission lever 32 and the patrone sensing lever 30 are kept in contact with each other so that the two levers are not constantly separated by a tension spring 33 hooked between the respective bottles 32c and 3Oe. It is configured so that it rotates in the state. When the cartridge sensing lever 30 rotates clockwise in the drawing due to loading of the cartridge I, both lever engaging portions 30d and 32b are engaged by the pressing force of the sensing lever 30, and the transmission lever 32 is rotated clockwise in the drawing. It is designed to rotate.

34 is this transmission lever 32 and the head holding lever 12
The levers 32 and 32 are respectively hooked up between the levers 34a and 34b and serve as biasing means for biasing the head holding lever 12 in the direction in which the magnetic head IO comes into pressure contact with the film surface. .12 engaging end 35a,
35b are always in contact with each other and are configured to operate in conjunction with each other.

In the following configuration, when the cartridge 1 is loaded into the cartridge chamber formed in a part of the camera body, the cartridge is sensed and the cartridge 8-30 moves against the biasing force of the spring 31 as shown in FIG. The fourth
As is clear from FIGS. (a) and (b), the transmission lever 32
The transmission lever 32 is rotated clockwise in FIG. Here, this transmission lever 32 is connected to the sensing lever 30 by the above-mentioned bow tension spring 33, and the engaging portion 30d.
32c are made to move as one with five contacts. Then, by the movement of this transmission lever 32,
The spring 34 between the head holding lever 12 and the head holding lever 12 is placed in the 6M state. This is obvious from the fact that the head is held by the notch 23 on the film sensing lever 20 side and its rotation is restricted. Reference numeral 40 in a) and (b) is a stator/bar that restricts the rotation position of the cartridge sensing lever 30 in the counterclockwise direction.

On the other hand, the head holding lever 12 is biased counterclockwise by the tension spring 34;
is locked in the notch 23 of the film sensing lever 20,
Movement in the counterclockwise direction, that is, in the direction in which the magnetic head 10 is brought into pressure contact with the film surface is restricted. This state is shown in Figure 5 (a
).

In this state, the film 2 is sent out from the cartridge 1, passes through the film path of the magnetic head 10, reaches the sensing roller 21, and presses down the roller 21, as is clear from FIG. 6(a)Jb). When the film sensing lever 20 is rotated clockwise in the figure against the biasing force of the spring 22, the notch 23 is disengaged from the locking piece 14, and the head holding lever 12 is energized by the spring 34. The magnetic head 10 is rotated counterclockwise in the figure by the biasing force, and the magnetic head 10 is brought into pressure contact with the film surface, so that magnetic recording on the film 2 (or reading of magnetic recording) is possible. This movable state is shown in FIG. 5(b).

Next, in the above-described configuration, the movements of each part when winding the film 2 into the cartridge 1 and taking out the cartridge 1 from the camera body will be described.

That is, the film 2 is wound toward the cartridge L side, and the leading end of the film 2 is wound onto the sensing roller 2 of the film sensing lever 20.
1, the film 2 against the roller 21
3, the sensing lever 20 rotates counterclockwise in the figure from the state shown in FIG. 3 due to the biasing force of the spring 22. However, at this time, Fii Ki to 7110
is moving in the direction of pressure contact with the film 2, and the holding lever 12 is in the state shown in Figure @3, so the rotation of the film sensing lever 20 is restricted midway by the locking portion 14. Become.

Furthermore, when the film 2 passes through the magnetic head 10 portion and is wound into the cartridge 1, the magnetic head 10, whose rotation has been regulated at a predetermined position by the film 2, is moved by the spring 3.
With the urging force of 4, it is further rotated in the direction of 21 in the figure.
It comes into contact with a pressure bonding pad (not shown), and its rotation is limited to a slight movement. Note that this pressure pad is made of a felt-like member that is relatively easily deformed, and is made of a felt-like member that is relatively easily deformed.
The film 1 and the magnetic head 1 are deformed by the pressing force caused by the
0 and IE.

After the film 2 is completely wound into the cartridge 1, when the cartridge 1 is taken out from the camera body l, the cartridge sensing lever 30 is rotated back to the initial position shown in FIG. 1 by the biasing force of the spring 31. Then, as shown in FIG. 4(a), it is in a state where it is engaged by the stopper pin 40. moreover,
This rotational movement of the patrone sensing lever 30 is caused by a spring 33.
is transmitted to the transmission lever 32, and the lever 32 is rotated counterclockwise in the figure from the state shown in FIG. 3 to the state shown in FIG. Then, the engaging portion 35a of the transmission lever 32 engages with the engaging portion 35b of the head holding lever 12, and the head holding lever 12 is moved clockwise in FIG. When the lever 12 is rotated and the locking piece 14 is positioned below the notch 23 of the film sensing lever 20, the sensing lever 20 is moved by the biasing force of the spring 22. is rotated counterclockwise in the figure,
The notch 23 is locked by the locking piece 14, and its rotation is restricted and stopped, and thereby the head holding lever lz side is also magnetically locked so that the head holding lever 10 is positioned at the retracted position. It turns out. This condition is shown as the first cause. In addition,
The biasing force of the spring 22 described above is set with enough margin to allow the sensing lever 20 to rotate further than when the notch 23 engages with the locking piece 14, and to obtain a reliable locking state 7g. It has become.

Further, the biasing force of the tension spring 31 is the same as that of the tension spring 33.3.
4, and when the cartridge I is taken out, the sensing lever 30. It is set to have a biasing force sufficient to move the transmitter 8-32 and the head holding lever 12 from the state shown in FIG. 3 to the state shown in FIG. Further, the tension spring 33 has a larger biasing force than the tension spring 34, and is set to have a biasing force that can return the transmission lever 32 and the head holding lever 12 to the state shown in FIG. 1 when the cartridge is taken out. Ru. Further, the tension spring 34 is set to have a biasing force sufficient to reliably engage the engaging portions 35a, 35b 1711 with the transmission lever 32 when there is no restriction on the rotational movement of the head holding lever 12. Ru. Furthermore, the tension spring 22 is connected to the head holding lever 1
The locking piece 14 of 2 is connected to the notch 2 of the film sensing lever 20.
3 and is set to have a biasing force sufficient to apply a rotational force to a position where it is securely locked.

According to the apparatus of the present invention having such a configuration, when the film 2 is sent out to the take-up spool side, the magnetic lead 10 is retracted (held at 6M, and is pressed against the film 2 after passing through it). It is composed of and also has a patrone l
When winding the film into the cassette 1, the magnetic head IO is retracted after the film 1 has been completely wound onto the cassette 1. Therefore, when using a film cassette that feeds the film from the cassette 1, it is difficult to feed the film 2. There is no possibility that the magnetic head 10 may interfere with film advancement.

Here, in the embodiment described above, the patrone sensing lever 3
0 is placed on the same side as the holder 8-12 that holds the magnetic head IO (for example, on the back cover side in the camera body), the transmission lever 32 was used, but the sensing lever 30
For example, as shown in FIG. 8, the holding lever 12 is placed on the opposite side (for example, the lens AM side) across the film path, and the extending piece 50 of 8-30 is also extended to the holding lever 12 side. By configuring the distal end engaging portion 35a to engage with the engaging portion 35b on the holding lever 12 side, the transmission lever 32 can be omitted. Note that a pin 34a for hooking one end of the spring 34 is provided on the fixed side.

It can also be used as the film sensing m roller 21.

Any configuration is sufficient as long as it can apply a downward force to the film sensing lever 20 when the film 2 passes through that part.
Of course, there may be a Fri moving piece 51 as shown in FIG. Here, in FIG. 8, parts that are the same as or correspond to those of the embodiment described above are given the same numbers, so that the structure, function, and effect thereof can be easily understood.

Note that the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part may be modified or changed as appropriate. For example, in the embodiment described above, the film 2 is always
The present invention relates to an automatic loading type still camera using a film cartridge 1 of a type in which the tip is stored in the feeding section lb and the film 2 is fed out to the take-up spool side by being loaded into the camera body. has been described, but the present invention is not limited thereto, and film cartridges having various structures that are used by feeding the film from one side of the camera body to the take-up spool side may be freely used.

Furthermore, in the embodiment described above, a biasing means for pressing the magnetic head 10 against the film surface is used, and a sensing lever 30 is used that stores energy by loading the cartridge 1. We are free to adopt various sensing means to obtain the desired results. Also, magnetic herad 1
As a means for moving the 0 toward the film surface, various modifications may be considered, such as using a simple slide lever.

Further, although the explanation was omitted in the above-mentioned embodiment, the film 2 locks the aperture 3 and a pressure plate (not shown) disposed opposite thereto within the camera body, as well as the upper and lower edge portions of this pressure plate. The film passes through a gap formed by a rail section on the camera body side, and at this time, the movement of the lower edge of the film L-1 in the radial direction is restricted by the rail section. This regulation in the film width direction is also performed at the portion of the film sensing lever 20 facing the sensing roller 21, so that the roller 21 can be pushed down by the side edge of the film 2.

〔Effect of the invention〕

- As explained above, according to the magnetic recording device for a camera according to the present invention, there is an aperture in the film path through which the film fed from the cartridge loaded on the - side of the camera body and headed for the take-up spool passes. a magnetic head which is disposed so as to be movable in a direction perpendicular to the film surface at a portion adjacent to the film surface; a locking means for stopping the movement of the magnetic head in a direction in which it comes into pressure contact with the film surface at a retracted position; A sensing means is provided in a film path between the head and the take-up spool so as to be movable forward and backward, and detects the leading edge of the film, releases the 1F state caused by the 1H means, and presses the magnetic head against the film surface. Despite the simple structure, the magnetic head, which is normally in pressure contact with the film surface, can be moved to the retracted position by the locking means during automatic loading by feeding the film from the cartridge to the take-up spool. At the same time, the film is unlocked by sensing that the film has passed through the magnetic head part, and the magnetic head is brought into pressure contact with the film surface to enable magnetic recording. This has various excellent effects such as eliminating the problem of the magnetic head being an obstacle when sending the film to the winding Lisbourg side, and ensuring reliable film feeding.

Further, according to the present invention, a biasing means for pressing the magnetic head against the film surface is provided, and a detecting means for detecting loading of the cartridge into the camera body is provided, and the detecting operation of the detecting means causes the biasing means to press the magnetic head against the film surface. Since the structure is configured to store energy, the film head can be moved forward and backward toward the film surface only by mechanical means, and there is an advantage that no electrical means is required.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view 1 of a magnetic head movable mechanism showing an embodiment of a magnetic recording device for a camera according to the present invention, FIGS. 2 and 3 are schematic perspective views for explaining its operation, and FIG.
Figures (a) and (b) are schematic side views for explaining the movement of the patrone sensing lever, and Figure 5 (a) and (b).
is a schematic plan view for explaining the movement of the head holding lever, FIGS. 6(a) and 6(b) are schematic front views for explaining the movement of the film sensing lever, and FIG. 7 is a schematic plan view for explaining the movement of the film sensing lever. FIG. 8 is a schematic perspective view showing another embodiment of the apparatus of the present invention. l...Film patrone, 2...Film. 3...Aperture, 10...Magnetic head for magnetic recording, 11...Magnetic helad movable mechanism, 12...
Head holding lever, 12a... Support shaft, 14...
Locking piece, 20...Film sensing lever, 20a...
... Support shaft, 21 ... Sensing roller, 22 ... Tension spring, 23 ... Notch (locking means), 30 ...
... Patrone sensing lever, 30a... Sensing end, 3
0b... Support shaft, 31... Tension spring, 32...
...Transmission lever, 32a... Support shaft, 33... Tension spring, 34... Tension spring (biasing means), 50
...extension piece, 51...sliding piece.

Claims (2)

[Claims] (1) In an automatic loading still camera configured to feed film from a film cartridge loaded on one side of the camera body, the film is fed through the film path facing the aperture of the camera body to the other side of the camera body. a take-up spool for winding a film from a film cartridge leading to the aperture; a magnetic head for magnetic recording disposed in a portion close to the aperture so as to be movable forward and backward in a direction perpendicular to the film surface; A locking means for locking the movement in the pressure contact direction at the retracted position, and a locking means that is movably provided in the film path between the magnetic head and the take-up spool and detects the leading edge of the film. 1. A magnetic recording device for a camera, comprising: sensing means for releasing the locked state and bringing the magnetic head into pressure contact with a film surface. (2) In claim 1, a biasing means for pressing the magnetic head against the film surface is provided, and a detecting means for detecting loading of the film cartridge into the camera body is provided, and the detecting operation of the detecting means biases the magnetic head. A magnetic recording device for a camera, characterized in that it is configured to store a magnetic recording device.