JPH0481735A - Camera using film with magnetic memory - Google Patents

Abstract

PURPOSE:To make a magnetic head securely contact the magnetic storage part of the film even if the magnetic head has a fitting error by forming a linear groove in a pressure plate at a position including the fitting part for the magnetic head. CONSTITUTION:The pressure plate 10 has the groove 10b of depth (f) which has the fitting part for the magnetic head 1 from the upper end to the lower end of the pressure plate 10. For example, even if the magnetic head 1 is fitted having its tip part at a position (distance d) which is greatly back from a position staying in level with or slightly back from a film contact surface 10a, the film 2 deforms along the groove 10b to its overall width when pressed by a pad 4 as long as the head is fitted within a range where d<f holds, so that the film is pressed against the magnetic head 1. Consequently, even if the magnetic head has a slight error in fitting position, the magnetic storage part which is laid on the film and the magnetic head can be brought into secure contact with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a camera that uses a film with a magnetic storage unit that is equipped with a magnetic head that writes information to or reads information from a magnetic storage unit included in the film. It is.

(Background of the Invention) Conventionally, a U.S. patent has been applied to a camera that uses a film equipped with a magnetic storage section, and allows a magnetic head to write photographing information, date, etc. on the magnetic storage section, or read information from the magnetic head. It has been proposed in No. 4860037 and the like.

FIG. 6 is a diagram showing the configuration of the main parts of this type of camera. The film 102 is fed through the gap between the main body 104 and the pressure plate 105, and at this time, the film 102 is fed through a magnetic field fixed to the pressure plate 105. Information is written to or read from the magnetic storage portion of the film 102 by the head 101.

By the way, when driving the magnetic head 101 in this way, in order to make the contact between the magnetic head 101 and the film 102 stable, a film pressing member ( pad), and this film pressing member 103 holds the film 10.
2 must be pressed against the magnetic head 101.

FIG. 7 is a perspective view of the pressure plate 105, in which the magnetic head 101 is attached to the head insertion hole 105a.

However, in the above-mentioned conventional example, the mounting of the magnetic head 101 on the pressure plate 105 may result in a positional relationship as shown in FIGS. 8 and 9 due to errors and component precision of the magnetic head 101 or the pressure plate 105. there were.

FIG. 8 shows that the magnetic head l○1 is at a distance a from the pressure plate 105.
05 and the main body 10.
4, and the thickness of the film 102 is C. If (b-a)<c, then when the film 102 is loaded into the camera and fed, the leading edge of the film is at a distance a. The film will end up hitting a protruding part and will not be able to wind the film any further.

FIG. 9 shows that the magnetic head 101 is at a distance d from the pressure plate 105.
As shown in FIG.
Even if the film 102 is pressed in the 01 direction, the film 102
It is restricted by the end face of the magnetic head insertion hole 105a of No. 05 and does not deform sufficiently. If the amount of deformation at this time is e, then e<d
If so, the film 102 does not come into contact with the magnetic head 101, so that the magnetic head 101 cannot accurately write or read information.

Also, in this case, it is possible to solve the above problem by increasing the film pressing force of the film pressing member 103, or the frictional force between the film pressing member 103 and the film 102 increases, causing a load during film feeding. This is not appropriate because there is a risk that the film 102 may become larger or the surface of the film 102 may be scratched.

(Object of the Invention) The object of the present invention is to solve the above-mentioned problems and to ensure the contact between the magnetic storage part of the film and the magnetic head even if there is some error in the installation of the magnetic head. It is an object of the present invention to provide a camera using a film with a magnetic storage part that can be used to store images.

(Characteristics of the Invention) In order to achieve the above object, the present invention forms a linear groove in the indentation at a position including the mounting portion of the magnetic head, and thereby
The film is characterized in that the film is deformed easily along the groove by being pressed by the film pressing member.

(Embodiment of the invention) Figures 1 to 3 show an embodiment of the present invention.
is a magnetic head having a magnetic gap, which writes information to and reads information from the magnetic storage portion of the film 2 running in the six directions of the arrows. 3 is a protrusion 9a provided on a ground (not shown).

The elongated holes 3a and 3b are fitted into the push lever 9b, and the push lever is attached so as to be slidable in the direction of the arrow B. A pad 4 is a film pressing member attached to the pressing lever 3. Reference numeral 5 denotes a spring, one end of which is attached to a base (not shown) and the other end of which is a pressing force, and which is attached to the three spring catch portion 30 of the lever 3, and the pressing force urges the lever 3 upward in FIG.

6 has elongated holes 6a and 6 in protrusions 9c and 9d of the base plate (not shown).
A rack lever b is fitted and configured to be slidable in the direction of arrow B, and its arm portion 6c can be pressed or engaged with the arm portion 3d of the lever 3. A worm member 7 is rotatably attached to a base plate (not shown), and is composed of a worm wheel portion 7a that meshes with the rack portion 6d of the rack lever 6 and a gear portion 7b. Reference numeral 8 denotes a spur gear that meshes with the gear portion 7b of the worm member 6, and is fixed to the rotating shaft of a pad drive motor 9 attached to a base (not shown).

10 is a groove 10b recessed by a depth f from the film contact surface 10a with which the film 2 contacts, as shown in FIG.
However, the pressure plate is provided in a direction perpendicular to the film running direction, and the magnetic head 1 is attached to the groove 10d at a position through which the magnetic storage section provided on the film 2 passes. At this time, the magnetic head 1 is attached so that its tip (magnetic gap la) is on the same level as the film contact surface 10a or at a position slightly recessed.

The bat driving motor 9 is capable of forward and reverse rotation, and is configured such that the rack lever 6 moves upward in FIG. 1 when it rotates in the normal direction, and moves downward when it rotates in the reverse direction.

In the above configuration, FIG. 1 first shows the positional relationship of each member when the magnetic head 1 is not driven. In this case, the arm 6c of the rack lever 6 and the arm 3b of the lever 3 are engaged when pressing. Therefore, during pressing, the movement of the lever 3 in the upward direction in FIG.

In this state, exposure operations for the film 2 are generally performed.

FIG. 2 shows the positional relationship of each member when the magnetic head 1 is writing or reading information to or from a magnetic storage section (not shown) of the film 2. From the state shown in FIG. This state is achieved by rotating the motor 9 in the normal direction. That is, when the pad drive motor 9 rotates normally, the rack lever 6 moves upward in FIG. , moves upward according to the biasing force of the spring 5, and stops with the pad 4 attached to the tip pressing the film 2 against the magnetic head 1. Further, in this state, the power to the pad driving motor 9 is cut off based on, for example, the energization time or a change in the state of a switch that operates in conjunction with the movement of the rack lever 6, and the motor 9 stops. Along with this, the rack lever 6 also stops.

In this state, the film 2 is correctly pressed against the magnetic head 1, so that information can be reliably written to and read from the magnetic storage section of the film 2. It goes without saying that when writing or reading this information, the film 2 is fed in the direction of the arrow in FIG.

When writing and reading of the above information is completed, the pad drive motor 9 is reversely energized. As a result, the motor 9 rotates in the reverse direction, and the rack lever 6 begins to move downward in FIG. Therefore, upon pressing, the lever 3 also begins to move downward in the figure, resisting the biasing force of the spring 5. Therefore, the pad 4 becomes separated from the second surface of the film. After that, the rack lever 6 de-energizes the motor 9 by changing the state of the switch that detects the initial position of the bat 4 and controlling the energization time to the bat driving motor 9, and each member moves as shown in FIG. return to the state.

As already explained, the pressure plate 10 has a groove 10 with a depth f passing through the mounting portion of the magnetic head l from the upper end to the lower end of the pressure plate 10.
For example, even if the tip of the magnetic head 1 is installed at a position (distance d) that is much more recessed than the above-mentioned film contact surface 10a or slightly recessed, the relationship d<f. If it is installed within the range where the following holds true, when the film 2 is pressed by the pad 4,
Unlike in the past, the film does not accumulate sufficiently due to restrictions such as the magnetic head insertion hole of the pressure plate, and as shown in FIG. Pressed to 1.

As in the above embodiment, the direction of the grooves provided in the pressure plate is not only perpendicular to the film running direction, but also in the direction perpendicular to the film running direction.
The same effect can be obtained even if the film passes through the part where it is attached and runs in the same direction as the film running direction. FIG. 5 shows this situation.

In FIG. 5, reference numeral 100 denotes a pressure plate, and as described above, a groove 100b is provided in the same direction as the running direction of the film 2. Note that 1 is a magnetic head as in the previous embodiment, and 100a is a film contact surface.

According to this embodiment, since the pressure plate is provided with a groove that passes through the mounting portion of the magnetic head and runs perpendicularly or in the same direction as the film running direction, the magnetic head may be mounted with some errors in position. Even if the pad presses the film smoothly, the film easily deforms along the groove, ensuring reliable contact between the magnetic storage part of the film and the magnetic head. There is.

(Effects of the Invention) As explained above, according to the present invention, a linear groove is formed in the pressure plate at a position including the mounting portion of the magnetic head, and thus,
The film is pressed by the film pressing member so that it deforms easily along the groove, so even if there is some error in the installation of the magnetic head, the contact between the magnetic storage part of the film and the magnetic head is ensured. can be made into something.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the mechanical configuration when the magnetic head is not driven according to an embodiment of the present invention, FIG. 2 is a plan view showing the mechanical configuration when the magnetic head is driven, and FIG. FIG. 4 is a perspective view showing a pressure plate and a magnetic head; FIG. 4 is a perspective view showing how the film is bent when the mounting position of the magnetic head is slightly changed; FIG. FIG. 6 is a perspective view showing the shape of the pressure plate; FIG. 6 is a cross-sectional view showing the main structure of this type of camera; FIG. 7 is a perspective view showing how a magnetic head is attached to a conventional pressure plate; FIG. 10 is a cross-sectional view for explaining problems that occur when there is an error in mounting the magnetic head. 1...Magnetic head, 2...Film,
4...bat, 3...press lever,
6... Rack lever, 7... Worm member, 9... Bat drive motor, 10...
...pressure plate, 10a...groove.

Claims (1)

[Claims] (1) It has a magnetic head that writes information to or reads information from a magnetic storage section provided on the film, a film pressing member that presses the film surface against the magnetic head, and an attachment part for the magnetic head, and is connected to the camera body. A camera using a film with a magnetic storage unit, which is equipped with a pressure plate for sandwiching the film in a gap between the two, wherein a linear groove is formed in the pressure plate at a position including a mounting portion of the magnetic head. A camera that uses attached film.