KR100234157B1 - Magnetic recording/reproducing camera and confirmation method of film image using thereof - Google Patents

Abstract

The present invention relates to a magnetic recording / sanitary camera and a method for identifying an image of a film using the same. According to the invention, the first detection means for determining the operating state of the double exposure prevention function of the film, the second detection means for determining the state of the irreversible developing indicator of the film, the first detection means and the second detection means detected by Locking means for maintaining the open state of the shutter in accordance with the received signal, the film image frame confirmation window 71 that can be opened and closed in accordance with the signal detected by the first and second detection means, and the advancement of the film image frame or A magnetic recording / reproducing camera is provided, comprising switch means for arbitrarily selecting reverse. In the camera capable of recording / reproducing in accordance with the present invention, not only the image contents of the developed film can be confirmed without using photo paper, but also the undeveloped film is prevented from being exposed to external light due to malfunction in image checking operation. There is an effect that the ease of use is promoted.

Description

Magnetic recording / playback camera and film image confirmation method using the same

1 is a front view showing a film having a magnetic information recording portion and a magnetic head embedded in a camera.

2A to 2D are plan views of film cartridges showing rotation of bar code discs according to respective film states.

3 is a plan view of the film cartridge with the bar code disk removed in FIG.

4 is a bottom view of the film cartridge shown in FIG.

5A to 5C are partial cross-sectional views of the film cartridge showing the bent states of the tabs according to the respective film states.

6 is a flow chart schematically illustrating a method of confirming image contents of a film according to the present invention.

7 is a perspective view showing the back of the camera according to the present invention.

<Description of the code | symbol about the main code of the drawing>

10 film 11: magnetic head

12: magnetic information recording section 13: exposure section

21: cartridge 22: bar code disk

31,32: Optical detection sensor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for magnetic recording / reproducing, and more particularly, to a camera for magnetic recording / reproducing capable of confirming an image of a developed film, and a film image checking method using the same.

The information provided by the film used in the conventional camera is limited to the extent to which the photographic image and the date on which the photograph was taken are displayed on one side of the image through exposure, development, and printing of the film. In such a camera system, when loading film into the camera, the film cartridge is placed in the camera in position and the film reader protruding from one side of the cartridge is pulled out so that it can be wound around the winding spool on the opposite side. Use After the development of the film, the film strip was separated from the cartridge and managed separately, and the image content developed on the film was visually confirmed not only on photo paper, but also by visually illuminating all the light including natural light.

Unlike the conventional camera system described above, a recently developed magnetic recording / reproducing camera has a built-in magnetic head, and various kinds of information can be recorded or reproduced on the magnetic material applied to the film by using the magnetic head. The reader of the film is not exposed from the cartridge, and automatic loading is achieved only by inserting the cartridge into a predetermined portion of the camera. In FIG. 1 a film and a magnetic head are shown schematically. The film 10 includes a film exposure part 13, a through part 15, and a magnetic information recording part 12. The film exposure part is a part where an image is formed by exposure to a subject as in the prior art, and the through part 15 is a part which makes it possible to detect the position of the film by the 14 built in the camera. The information recording unit 12 is typically arranged at the edge of the film, and various information, for example, information according to the date, exposure state and other camera functions, can be input or reproduced by a magnetic head embedded in the camera.

In the case of a film capable of magnetic recording / playback, even after development, the film is stored in the cartridge instead of being stored separately from the cartridge. This storage method is to protect the magnetic information recording section and the exposure section, and as mentioned above, the leader of the film does not protrude out of the cartridge, but also to prevent the film from being accidentally ejected out of the cartridge. However, this storage method is very inconvenient because the user can not directly check the image content of the developed film with the naked eye. If you want to check this, you have to purchase a separate video equipment or go to the lab.

On the other hand, when using a camera and a film capable of magnetic recording / playback, a double exposure prevention (DEP) function is added which prevents an already exposed film from being accidentally reexposed. As such a function, what is currently employ | adopted for a camera is a mechanical system and an optical system.

2 a to 2 d show the upper end of the cartridge with optical double exposure protection, and FIG. 3 shows the upper end of the cartridge with the disk 22 removed. At the upper end of the cartridge 21, a data disk 22 is rotatably attached. The disk 22 is in the form of a barcode, and indicates the state of the film strip according to its rotation angle. On the upper cartridge surface of the disk 22, photodetecting sensors 31 and 32 are provided, which can detect the state of the film as the disk 22 in the form of a barcode rotates. In FIG. 2, if the start part of a bar code is S and the end part of a bar code is E based on the indicator line L, the present state of a film is detected according to the rotation position of the start part and the end part with respect to the said reference position. For example, FIG. 2 shows that the film a is not exposed, the b is partially exposed, the c is all the film exposed, and the d is the development completed. Each of these film states is detected by detection means built in the camera.

On the other hand, an irreversible developing indicator is formed at the bottom of the cartridge. An irreversible processed indicator (IPI) 41 shown in FIG. 4 is formed at the bottom of the cartridge 21 in the form of a tab, one corner being separated from the bottom and the other corner attached thereto. The irreversible developing indicator indicates whether or not the film has been developed. When the development is finished in the developing lab, the tab is bent into the cartridge by using a developing mechanism actuator. Since the camera has a built-in sensor element for the tap, it is possible to check the state of the tap. 5 is a cross-sectional view of the state of the tab according to each development state, when not developed, the tab is not bent as shown in a, but when developed is bent into the cartridge as shown in b and c. In the present invention is to solve the above problems by using the optical double exposure prevention function and the irreversible development indicator.

It is an object of the present invention to provide a camera for magnetic recording / reproducing capable of confirming image contents of a film.

Another object of the present invention is to provide a camera for magnetic recording / playback that can correct the magnetic input contents while checking the image contents of the film.

Another object of the present invention is to provide a method for confirming the image contents of a film having a magnetic information recording section by using a magnetic recording / reproducing camera.

In order to achieve the above object, according to the present invention, the first detection means for determining the operating state of the double exposure prevention function of the film, the second detection means for determining the state of the irreversible development indicator of the film, the first detection means And locking means for maintaining an open state of the shutter according to the signal detected by the second detection means, a window and film image frame for confirming the film image frame which can be opened and closed according to the signals detected by the first and second detection means. A magnetic recording / reproducing camera is provided, comprising switch means for arbitrarily selecting forward or backward direction.

According to another feature of the present invention, the magnetic recording / reproducing operation can be performed while checking the image frame of the film through the image frame confirmation window.

According to another feature of the invention, the image frame confirmation window is automatically opened and closed by an electrical signal.

According to another feature of the present invention, the image frame confirmation window may be opened and closed by hand by releasing the locking device by an electrical signal.

According to the present invention, a first detecting step of determining whether or not the development of the film loaded in the camera as the state of the irreversible development indicator formed on the bottom of the cartridge, the first determination step of determining whether the double exposure prevention function for the film is in operation 2 detection step, keeping shutter open to allow external light to enter into the camera, maintaining the opening of the image frame window installed on one side of the camera, and proceeding the film so that the image of the film can be checked frame by frame through the window for checking the image frame Provided are an image confirmation method of a magnetic recording / reproducing film including a film frame back and forth steps.

According to a feature of the present invention, there is provided a method for confirming an image of a magnetic recording / reproducing film, characterized in that magnetic recording or reproducing of a film can be performed during the film frame forward and backward steps.

Hereinafter, the present invention will be described in more detail with reference to an embodiment shown in the drawings.

Confirming the image contents of the magnetic recording / reproducing film according to the present invention is shown in a flowchart in FIG. First, the user applies power to the camera and loads a film cartridge into the camera. The camera according to the present invention is provided with an image confirmation switch A, an image frame forward switch A, and an image frame reverse switch C. The central processing unit (i.e., control means) of the camera determines whether the user has activated the switch A for image checking, so that if the switch A is not operated, it can perform a normal camera function, and the switch A ) Is activated, perform the image check function. In the image checking step, it is first judged by the sensor whether or not the irreversible developing indicator is operated. If the irreversible development indicator does not work, the camera will display an error message because the film is not developed. If the irreversible developing indicator has been operated, the process proceeds to the next step to check whether the bar code disk is in the developing completion position (position of FIG. 2 d) in the double exposure prevention apparatus. If the double exposure prevention device detects that the film is not developed at all, the camera issues an error message again.

If it is determined by the central processing unit (control means) that the film is completely developed in the irreversible developing indicator and the double exposure preventing mechanism, the shutter of the camera and the window for checking the image can be opened. The shutter opening of the camera is maintained while the checking operation of the image frame is made by the locking means.

7 is a rear perspective view of the camera, and an image window 71 is formed on the back of the camera. The image confirmation window may be opened or closed automatically by an electrical signal or semi-automatically. In the case of the automatic opening and closing method, the electric signal operates the window opening and closing motor to open and close the window. In the case of semi-automatic, the window locking device is released by an electrical signal, and the user opens and closes the window by hand. The image of the developed film can be visually confirmed by external light coming through the camera lens and the open shutter. Alternatively, the user may make changes to the magnetic recording contents while visually checking the image of the film. The window 71 is formed by forming a rectangular cutout on the back of the camera corresponding to the film frame size, and by sliding a flat plate covering the cutout with respect to the back of the camera. A drive motor built into the camera can move the plate. It is preferable that a light blocking member is formed on the edge surface of the window so that external light cannot enter the camera.

The camera is provided with driving means for advancing or reversing the image frame of the film, which is a conventional motor used for advancing the film frame during normal operation of the camera or rewinding the film after shooting is finished. Can be used in common. In the camera according to the present invention, a film image frame forward switch B and a reverse switch C are provided so that a user can arbitrarily select a function of a motor. The frame forward / reverse switch performs a function of allowing the user to move to the next frame or the previous frame after checking the image of the film.

When the checking operation on the film image frame is finished, the film is wound into the cartridge according to the user's selection, and the cartridge can be unloaded from the camera. At this time, the shutter and the window for checking the image frame are closed.

In the camera capable of magnetic recording / playback according to the present invention, not only the image contents of the developed film can be confirmed without using photo paper, but also the undeveloped film is prevented from being exposed to external light due to malfunction in image checking operation. There is an effect that the ease of use is promoted. The user can also correct the magnetic recording contents while checking the image of the film.

Although the present invention has been described with reference to one embodiment shown in the drawings, those skilled in the art will understand that various embodiments are possible therefrom. Therefore, the true technical scope of the invention should be defined by the appended claims.

Claims (6)

A magnetic head for inputting or reproducing magnetic information from a magnetic information recording unit formed on the film, first detecting means for determining an operating state of the double exposure preventing function of the film, and determining a state of the irreversible developing indicating unit of the film Control means for judging signals detected by the second detection means, the first detection means and the second detection means, a locking means for keeping the shutter open by the control means, and a film image that can be opened and closed by the control means. A frame recording window (71) and a switch means for arbitrarily selecting forward or backward of the film image frame. The magnetic recording / reproducing camera according to claim 1, wherein the magnetic recording / reproducing operation can be performed through the magnetic head while checking the image frame of the film through the image frame confirmation window (71). The magnetic recording / reproducing camera according to claim 1, wherein the image frame confirmation window (71) is automatically opened and closed by built-in driving means operating in accordance with an electrical signal. The magnetic recording / reproducing camera according to claim 1, wherein the image frame confirmation window (71) can be opened and closed by hand by releasing the locking device by an electrical signal. A first detection step of determining whether the film loaded in the camera is developed as a state of an irreversible development indicator formed at the bottom of the cartridge, a second detection step of determining whether the double exposure prevention function for the film is in operation, the camera Retaining shutter opening step to allow external light to enter into, Retaining window opening for image frame check installed on one side of the camera, and Film frame for advancing the film to check the image of the film frame by frame through the window for checking the image frame The image confirmation method of the magnetic recording / reproducing film containing back and forth steps. 6. The method of claim 5, wherein magnetic recording or reproducing of the film can be performed during the film frame forward and backward steps.