JPH06118501A - Camera with magnetic recording function - Google Patents

Abstract

PURPOSE:To execute excellent magnetic recording and to drastically improve the flatness of a film without making a camera large-size. CONSTITUTION:A magnetic recording means 2 is provided at a position faced to a film leading edge guide member 5 provided in a spool chamber 12 and interposing the film 10 in between. Then, a film pressing member 3 is arranged at or near the guide member 5 positioned at the place where it does not interfere with a shutter unit, a lens barrel unit or the like. Simultaneously, the pressing member 3 is set so as to be separated from a photographic picture part 10a as distant as possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a camera with a magnetic recording function provided with a magnetic recording means such as a magnetic head for recording magnetic information on a film surface.

[0002]

2. Description of the Related Art Conventionally, a camera capable of magnetic recording on a film surface with a magnetic head is disclosed in Japanese Patent Laid-Open No. 3-2649.
No. 34, etc.

[0003]

However, since the magnetic head is fixed to the film pressure plate of the camera as shown in the proposal, the pad for pressing the film surface to the magnetic head is a shutter unit or a lens. There is a problem that it interferes with a lens barrel unit or the like, resulting in a large camera, and because the film is pressed near the photographic screen with the pad, the flatness of the film is significantly deteriorated.

(Object of the Invention) An object of the present invention is to provide a camera with a magnetic recording function, which enables good magnetic recording without increasing the size of the camera and can significantly improve the flatness of the film. It is to be.

[0005]

According to the present invention, magnetic recording means are provided at opposing positions sandwiching a film of a film tip guide member provided in a spool chamber, and a film pressing member is provided as a shutter unit or a lens barrel unit. The film pressing member is arranged at or near the film tip guide member at a position where it does not interfere with the above, and the film pressing member is separated from the photographing screen portion as much as possible.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on the illustrated embodiments.

FIG. 1 to FIG. 5 are views showing the main configuration of a camera with a magnetic recording function according to the first embodiment of the present invention.
In these figures, the holder 1 for fixing the recording magnetic head 2 is fixed to the film pressure plate 7 with screws 6. The pad 3 for pressing the film 10 against the magnetic head 2 includes a surface coating layer 3a, an elastic body portion 3b, and a metal base portion 3c.
The compression spring 4 presses the metal base 3c to generate a force.

FIG. 3 shows the initial state of automatic loading of the film 10. In this state, the film leading end guide member 5 provided in the spool chamber 12 is shown.
When the film take-up spool 9 having the hooking claw 9a on which the perforation (not shown) of the film 10 is hooked is rotated, the film portion 10a at the tip end is longer than the hooking claw 9a as shown by the broken line in FIG. In addition, it also has a role of preventing contact with the film winding portion 10b.
The film tip guide member 5 is provided with a pad 3 for pressing the film 10 onto the magnetic head 2.
The film 10 is pressed against the magnetic head 2 by the pressing spring 4.

FIG. 4 shows the initial winding state of the film 10, and FIG. 5 shows the maximum winding state of the film 10. In the initial winding state of the film shown in FIG.
The film 10 is transferred from the photographing screen portion 10a (the film portion facing the aperture portion 11) to the film take-up spool 9.
The angle at which the film is pulled is considered to be about ψ degrees, but when the film is maximally wound as shown in FIG.
The angle is considered to be about 0 degree because it is wound almost horizontally with respect to.

Therefore, when magnetic recording is performed on the film 10 by the magnetic head 2, the contact state must be improved as much as possible. In the first embodiment,
The film pulling angle θ when the film 10 is in an almost intermediate winding state between the initial winding state (state of FIG. 4) and the maximum winding state (state of FIG. 5), that is, the state as shown in FIG. The magnetic head 2 so that it is parallel to ₁
And the pad 3 is arranged.

When the magnetic head 2 and the pad 3 are set in such a positional relationship, needless to say, not only in the state of FIG. 2, but also in the initial stage of film winding as shown in FIG. 4, the magnetic head 2 is already inclined by the angle θ _1. Therefore, the difference is only in the angle (ψ-θ ₁ ), contact failure hardly occurs, and good contact can be obtained. Further, even when the film is in the maximum winding state as shown in FIG. 5, the film 10 is slightly R1.
Therefore, a contact failure hardly occurs and a good contact can be similarly obtained.

Further, since the corner portion of the holder 1 to which the magnetic head 2 is fixed has a rounded shape R2, the film 10 may be scratched even when the film 10 is bent by R1. The film winding on the film winding spool 9 can be smoothly carried out.

Further, the pad 3 is attached to the film front guide 5.
Since the structure is provided, the pad 3 can be set at a position farthest from the photographing screen unit 10a determined by the aperture unit 11, and the influence of the photographing screen unit 10a on the film flatness can be minimized. Becomes

Reference numeral 8 is a film guide member for pressing the film 10 against the film take-up spool 9 so that the film can be taken up smoothly.

(Second Embodiment) FIGS. 6 to 9 are views showing a main part structure of a camera with a magnetic recording function according to a second embodiment of the present invention.

In these figures, the holder 101 for fixing the recording magnetic head 102 is, as shown in FIG.
A spring 1 that is rotatably supported by the camera body 112 about a shaft 106 and that has a biasing force in the direction of arrow A.
It is urged by 14 in the direction of rotation of arrow B. The roller portion 108a of the film guide member 108 is rotatably supported by the roller support base 108b.
8b is fixed to the holder 101, and the spring 11
The roller portion 108a is biased to the film winding spool 109 by the biasing force of 4.

Also, as in the first embodiment, the film 11
The pad 103 for pressing 0 onto the magnetic head 102 includes a surface coating layer 103a, an elastic body portion 103b, and a metal base portion 103.
The metal base portion 103c is pressed by the compression spring 104 to generate a force. Further, the film front end guide member 105 provided in the spool chamber 113 is
The film take-up spool 10 having hooking claws 109a hooked with perforations (not shown)
When 9 rotates, it has a role of preventing the film part 110a at the tip of the hooking claw 109a from coming into contact with the film winding part, and a role of holding the pad 103 for pressing the film 110 to the magnetic head 102. have.

In the above structure, FIG. 6 shows the film 110.
Shows the initial winding state of the film 110. The film 110 is pressed by the film guide member 108 fixed to the holder 101, and the film 110 is wound at an angle θ ₂ with respect to the photographing screen 110a facing the aperture 111. It is pulled by the spool 109. In this state, the spring 104 that presses the pad 103 against the magnetic head 102 has the highest spring force, but it is necessary to set the rotation biasing torque of the rotation biasing spring 114 of the holder 101 to be higher than that of the spring 104. There is.

In this embodiment, the rotary shaft 1 of the holder 101 is
As shown in FIG. 6 and the like, 06 is set in the vicinity of the intersection of the angle θ ₂ and the photographing screen section 110a, and the rotating shaft 10 is set in accordance with the film winding diameter on the film winding spool 109.
6 is rotated about the center, and in conjunction with this, the holder 101,
That is, since the magnetic head 102 is rotated, the magnetic head 102 is positioned substantially parallel to the film angle θ ₃ pulled by the film take-up spool 109 even in the case shown in FIG. 7. Therefore, it becomes possible to obtain the best contact state in magnetic recording (and magnetic reproduction). Moreover, since the pad 103 provided on the film leading guide 105 is constantly urged by the spring 104, even if the magnetic head 102 rotates around the rotation shaft 106 of the holder 106 as shown in FIG. Can be followed.

FIG. 8 is a view showing a state in which the film winding further progresses from the state of FIG. 7 to reach the maximum winding diameter, and the film angle θ ₄ pulled by the photographing screen portion 110a and the film winding spool 109. Is almost zero. Even in this state, the magnetic head 102 can be rotated about the rotation shaft 106 by the film guide member 108 to maintain the parallel state with the film 110, and ideal magnetic recording (and magnetic reproduction) can be performed.

(Third Embodiment) FIG. 10 and FIG. 11 are views showing the main structure of a camera with a magnetic recording function according to a third embodiment of the present invention. The same parts as those of FIGS. 6 to 9 are the same. The reference numerals will be given and the description thereof will be omitted.

In this embodiment, the holder 206 that moves the same as the holder 101 in the second embodiment is
The pad 203 is structured to be attached via a leaf spring 204 to which the metal base portion 203c is fixed.

As a result, even when the magnetic head 202 rotates about the rotation axis 206 of the holder 201 and follows the film 110 wound on the film winding spool 109 so as to be parallel to the film 110, the second embodiment ( (See FIG. 8), the film 11 formed by the pad 203 is different.
Since the pressing force of 0 on the magnetic head 202 can be applied in the vertical direction, more stable magnetic recording (and magnetic reproduction) can be performed.

Further, by adopting such a structure,
The rotation biasing force of the holder 201 is not affected by the pressing force of the pad 203, and the pad 20
3 and the magnetic head 202 can be unitized, the assembly is simplified, and the quality can be remarkably improved.

(Fourth Embodiment) FIG. 12 is a diagram showing the main structure of a camera with a magnetic recording function according to the fourth embodiment of the present invention. The same parts as those in FIGS. 6 to 11 are designated by the same reference numerals. Along with that, the description is omitted.

In the fourth embodiment, as shown in FIG. 12, the film front end guide member 302 is not fixed, but the recess 301a formed in the fixing member 301 is fitted with the spring support 302b. The structure has a roller 302a at the tip. Others are the same as those in the third embodiment.

According to the above-described first to fourth embodiments, a pad for pressing the film surface against the magnetic head is attached to the film tip guide member provided in the spool chamber (first and second embodiments), Alternatively, since it is provided in the vicinity of the film leading end guide member (third and fourth embodiments), the focal plane shutter and the photographing lens barrel can be set and the pad is pressed without enlarging the camera. It is possible to minimize the influence of film flatness due to pressing by moving the position away from the shooting screen.

(Modification) In this embodiment, the pad is urged by the spring to press the film surface against the magnetic head so that the magnetic recording is favorably performed on the film surface by the magnetic head. Without being limited to this, the pad is fixed at the position of the film tip guide member,
A magnetic head arranged at a position corresponding to this may be made to be able to advance and retreat toward the film running surface side by an elastic member such as a spring so that the same function is exerted.

[0029]

As described above, according to the present invention,
The magnetic recording means is provided at a position opposite to each other across the film of the film tip guide member provided in the spool chamber,
The film pressing member can be arranged at or near the film front end guide member at a position where it does not interfere with the shutter unit, the lens barrel unit, etc., and the film pressing member can be formed from the photographing screen section. I'm trying to separate them.

Therefore, good magnetic recording can be achieved without increasing the size of the camera, and the flatness of the film can be significantly improved.

[Brief description of drawings]

FIG. 1 is a plan view showing a camera with a magnetic recording function according to a first embodiment of the present invention with an upper lid removed.

FIG. 2 is a plan view showing the main configuration of a camera with a magnetic recording function according to the first embodiment of the present invention.

FIG. 3 is a plan view showing an initial state of automatic film loading in the camera of FIG.

FIG. 4 is a plan view showing an initial state of film winding in the camera of FIG.

FIG. 5 is a plan view showing a state when the film is maximally wound in the camera of FIG.

FIG. 6 is a plan view showing a main part configuration of a camera with a magnetic recording function according to a second embodiment of the present invention.

FIG. 7 is a plan view showing a state where film winding is in the middle in the camera of FIG.

8 is a plan view showing a state when the film is maximally wound in the camera of FIG.

9 is a perspective view showing a main configuration of the camera of FIG.

FIG. 10 is a perspective view showing the configuration of the main part of the third embodiment of the present invention.

FIG. 11 is a plan view showing a main part configuration of a camera with a magnetic recording function according to a third embodiment of the present invention.

FIG. 12 is a plan view showing a main part configuration of a camera with a magnetic recording function according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1, 101, 201 Holder 2, 102, 202 Magnetic head 3, 103, 203 Pad 5, 105, 302 Film tip guide member 8, 108 Film guide member 10, 110 Film 10a, 110a Photographing screen section 12, 113 Spool chamber 106 , 206 rotation axis

Claims (3)

[Claims] 1. A magnetic recording device for recording magnetic information on a film surface, and a magnetic recording device provided at a position facing the magnetic recording device.
In a camera with a magnetic recording function, comprising: a film pressing member for pressing the magnetic recording means and the film surface, and a film tip guide member provided in a spool chamber, wherein the magnetic recording means is the film tip guide member. A camera with a magnetic recording function, which is provided at a position facing each other. 2. An aperture section of a camera when a mounting angle of a magnetic head provided at a position opposite to a film leading end guide member is approximately midway between a film winding amount of a film winding spool and a film winding amount of the film winding spool. 2. The camera with a magnetic recording function according to claim 1, wherein the film angle is matched with the film angle formed when the film is taken up on the film take-up spool via. 3. A film take-up via an aperture portion of a camera, wherein a mounting angle of a magnetic head provided at a position opposed to a film leading end guide member changes according to a film take-up amount on a film take-up spool. 2. The camera with a magnetic recording function according to claim 1, wherein the camera is movable so as to always match the film angle formed when the film is wound on a spool.