JPH09244131A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of vibration or impact and to accurately record information on a magnetic recording medium on a film or reproduce the information recorded on the magnetic recording medium by inhibiting the execution of a driving operation by a drive source, with an inhibiting means, while recording or reproducing with a magnetic head is executed. SOLUTION: The timing of writing the information by the magnetic head 16 is obtained from the moving state of the film 6 by a microcomputer 2. This microcomputer 2 magnetically records the information on the magnetic recording medium of the film 6 by the magnetic head 16, according to the timing of writing or reads the information recorded on the magnetic recording medium of the film 6. While the magnetic head 16 writes or reads the information, an operation inhibiting part 30 inhibits the operations of operating parts 28 such as a finder picture switching part 18, a zooming part 20, a barrier opening/ closing part 22, a lens drive 24 and a flashing device moving part 26.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a function of recording information on a magnetic recording medium on a film and reproducing the information recorded on the magnetic recording medium. Alternatively, the present invention relates to a camera with improved reliability of reproduction operation.

[0002]

2. Description of the Related Art In recent years, a camera having a magnetic recording / reproducing function of recording photographing information on a magnetic recording medium on a film and reproducing the information recorded on the magnetic recording medium has been studied. For example, JP-A-5-17520
According to Japanese Patent Publication No. 9, a camera is proposed which detects the rotation cycle of a feeding motor and generates a timing signal corresponding to this cycle to perform magnetic recording or reproduction.

Further, Japanese Patent Application Laid-Open No. 7-128731 proposes a camera which prohibits switching of the photographing screen size, that is, switching between panorama and standard screen during film feeding.

[0004]

However, in the camera according to the above-mentioned Japanese Patent Laid-Open No. 5-175209, when the screen of the finder is switched during magnetic recording or reproduction, the vibration or Due to the impact, it may not be possible to accurately record the information on the magnetic recording medium on the film and to accurately reproduce the information recorded on the magnetic recording medium.

Further, in the camera disclosed in Japanese Patent Laid-Open No. Hei 7-128731, by prohibiting switching between the panorama and the standard screen during the date imprinting, the imprinting position is prevented from becoming abnormal. But,
In magnetic recording and reproduction of information on a magnetic recording medium on a film, for example, as described in Japanese Patent Application Laid-Open No. 5-175209, recording is performed at a fixed position on the film, and thus date imprinting is performed. Is different from the issue of

Therefore, the present invention has been made in view of the above-mentioned problems, and by reducing the impact and vibration during recording or reproducing of information, accurate recording of information on a magnetic recording medium on a film, and magnetic recording. An object of the present invention is to provide a camera capable of accurately reproducing information recorded on a recording medium.

[0007]

In order to achieve the above object, the camera of the present invention has a magnetic head for recording or reproducing information on a magnetic recording medium on a film, and a vibration or shock caused by execution of a driving operation. The present invention is characterized by including a drive source that is generated and a prohibition unit that prohibits the drive operation from being performed by the drive source while the recording or the reproduction is being performed by the magnetic head.

Further, the camera of the present invention comprises a magnetic head for recording or reproducing information on a magnetic recording medium on a film, a drive source for generating vibration or impact by executing a drive operation, and feeding of the film. And a prohibiting means for prohibiting execution of the driving operation by the driving source during the film feeding operation by the feeding means.

Further, the camera of the present invention is characterized in that the drive source starts execution of the drive operation in response to the operation of the manual operation member. That is, in the camera of the present invention, when recording or reproduction is being performed by the magnetic head, the prohibition means prohibits the drive operation from being performed by the drive source, thereby preventing the occurrence of vibration or impact.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a camera according to an embodiment of the present invention. A motor 8 for feeding the film 6 through a motor driver 4 is provided to the microcomputer 2 which controls the overall operation of the camera.
A perforation reading section 10 for detecting a perforation hole, a photo interrupter 14 for detecting rotation of a driven roller 12 which rotates according to the movement of the film 6, and information recorded on or from the magnetic recording medium on the film 6. Magnetic head 16 for reproducing information
And finder screen switching unit 18, zoom unit 20, barrier opening / closing unit 22, lens drive unit 24, flash device moving unit 2
The operation unit 28 including 6 and the operation prohibition unit 30 that prohibits the operation of these operation units 28 are connected. Operation prohibition unit 30
May be included in the microcomputer 2.

A gear 32 is provided at the tip of the motor 8, and a drive transmission mechanism 34 mechanically connected to the gear 32 has a gear 38 fixed to a spool 36.
The one-way clutch 40 is mechanically connected. Further, a fork gear 44 for rotating a spool (not shown) in the film cartridge 42 is connected to the one-way clutch 40.

Next, the operation of the camera of this embodiment will be described. Here, in this camera, the magnetic head 1
The operation at the time of winding one frame in which recording and reproduction according to No. 6 are executed will be described.

The microcomputer 2 instructs the motor driver 4 to drive the motor 8. When the motor 8 is driven, the gear 32 fixed to the tip of the rotation shaft of the motor 8 rotates, and this rotation is transmitted to the drive transmission mechanism 34. The drive transmission mechanism 34 drives the gear 38 fixed to the spool 36 by the rotation transmitted from the gear 32. The spool 3 that rotates with the rotation of the gear 38
6 pulls the film 6. The rotation transmitted to the drive transmission mechanism 34 drives the fork gear 44 via the one-way clutch 40 to push the film 6 out of the film cartridge 42.

Here, there is a speed difference between the rotation speed of the spool 36 and the rotation speed of the spool in the film cartridge 42 rotated by the fork gear 44, and the spool 36 rotates faster than the spool in the film cartridge 42. There is. Therefore, the spool 36 pulls the film 6. This speed difference is absorbed by the one-way clutch 40.

When the film 6 is fed, the perforation reading unit 10 reads the perforation holes provided in the film 6, so that the microcomputer 2 detects the moving state of the film 6. Then, from the moving state of the film 6 and the moving state of the film 6 obtained by the driven roller 12 and the photo interrupter (PI) 14, the timing of writing (recording) information by the magnetic head 16 is obtained by the microcomputer 2.

The microcomputer 2 uses the magnetic head 16 to drive the film 6 according to the write timing.
Information is magnetically written (recorded) on the magnetic recording medium. Alternatively, the information recorded on the magnetic recording medium of the film 6 is read (reproduced).

When the magnetic head 16 is writing or reading information, the operation inhibiting section 3
0 is the operation unit 28, for example, the finder screen switching unit 18,
Zoom unit 20, barrier opening / closing unit 22, lens drive unit 2
4. The operation of the flash unit moving unit 26 is prohibited.

As a modification of this embodiment, the operation of the operation unit 28 is not prohibited while the magnetic head 16 is writing or reading information, but the motor drive 4 feeds the film 6. The operation of the operation unit 28 may be prohibited by the operation prohibition unit 30 when the frame is being wound, that is, during the operation of winding one frame.

Here, the write timing by the magnetic head 16 will be described in detail with reference to FIG. FIG.
5 is a diagram showing a perforation read signal output from the perforation reading unit 10 and a write timing by the magnetic head 16. FIG.

The film 6 is stopped at the "one frame stop" position shown in FIG. 2 with respect to the perforation reading section 10. When the winding operation of the film 6 is started at time t0, "H" and "L" signals are output from the perforation reading unit 10 as the "perforation reading signal".

At this time, in response to the first falling signal of the "perforation read signal" at time t1, the operation prohibiting unit 30 causes the viewfinder screen switching unit 18, zoom unit 20, barrier opening / closing unit 22, lens drive unit 2 to operate.
4. The operation of the operation unit 28 including the flash unit moving unit 26 is prohibited. This operation prohibition is released when the next "one frame stop" is detected. Then, the magnetic head 16 starts writing information at time t2 shown in FIG. Note that the release of the operation prohibition is not limited to this, but at time t3.
It may be canceled in response to the rising signal or the falling signal of the "perforation read signal" from the time t4 to the time t4.

As described above, according to the present embodiment, by prohibiting the operation of the operating means by the read signal of the perforation during writing (recording) or reading by the magnetic head or during film feeding, Since no impact or vibration occurs during writing or reading of the head, jitter is reduced and stable magnetic recording or magnetic reproduction can be performed.

According to the above embodiment of the present invention, the following configuration can be obtained. (1) A camera having a magnetic head, characterized in that it has an operation prohibiting means for prohibiting the operation of the operating means during magnetic recording. (2) A camera having a magnetic head, characterized in that it has an operation inhibiting means for inhibiting the operation of the operating means during magnetic writing. (3) A camera having a magnetic head, characterized in that it has an operation inhibiting means for inhibiting the operation of the operating means during film feeding. (4) A camera having a magnetic head, characterized by having a prohibiting means for prohibiting the operation of the operating means by a read signal of perforation. (5) The camera according to any one of (1) to (4), wherein the operation means is a viewfinder screen switching means. (6) The camera according to any one of (1) to (4), wherein the operation means is means for switching the magnification of the photographing optical system. (7) The camera according to any one of (1) to (4), wherein the operation means is a lens driving means. (8) The camera described in (1) to (4), wherein the operating means is a barrier opening / closing means. (9) The operating means is a moving means of a flash device ( The camera according to any one of 1) to 4) (10) In the above-mentioned prohibition means, a detection switch is provided in the manual operation means, and the detection is performed by a signal from this detection switch. (11) A magnetic head for recording or reproducing information on or from a magnetic recording medium on a film, a drive source for generating vibration or impact by executing a drive operation, and a feed for feeding the film. Means, a signal generating means for generating a signal according to the movement of the film during the film feeding operation by the feeding means, and the driving movement by the driving source based on the signal from the signal generating means. (12) A magnetic head for recording / reproducing information on / from a magnetic recording medium on a film, and a vibration or shock due to execution of a driving operation. A driving source for generating a film, a feeding means for feeding the film, and a prohibiting means for prohibiting the driving operation by the driving source during the film feeding operation by the feeding means. (13) The camera according to (12), wherein the prohibiting operation is started or canceled by the prohibiting means based on a perforation reading signal of the film.

[0024]

As described above, according to the present invention, it is possible to accurately record information on the magnetic recording medium on the film and reduce the impact and vibration during the recording or reproducing of information. It is possible to provide a camera capable of accurately reproducing recorded information.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a camera according to an embodiment.

FIG. 2 is a diagram showing a perforation read signal and a write timing.

[Explanation of symbols]

 2 Microcomputer 4 Motor driver 6 Film 8 Motor 10 Perforation reading part 12 Followed roller 14 Photointerrupter 16 Magnetic head 18 Finder screen switching part 20 Zoom part 22 Barrier opening / closing part 24 Lens drive part 26 Flash device moving part 28 Operation part 30 Operation prohibition Parts 32, 38 Gear 34 Drive transmission mechanism 36 Spool 40 One-way clutch 42 Film cartridge 44 Fork gear

Claims (3)

[Claims] 1. A magnetic head for recording or reproducing information on or from a magnetic recording medium on a film, a drive source for generating vibration or impact by executing a drive operation, and recording or reproducing by the magnetic head. And a prohibition unit that prohibits execution of the drive operation by the drive source. 2. A magnetic head for recording or reproducing information on or from a magnetic recording medium on a film, a drive source for generating vibration or impact by executing a drive operation, and a feeding means for feeding the film. A camera comprising: a prohibiting unit that prohibits the driving operation of the driving source during the film feeding operation of the feeding unit. 3. The camera according to claim 1, wherein the drive source starts execution of the drive operation in response to an operation of a manual operation member.