JPH07141732A - Magnetic head device for photographic film - Google Patents

Abstract

PURPOSE:To surely make the magnetic recording layer of photographic film along the gap part of a magnetic head even when the magnetic head is tilted by forming a pad for pressing the photographic film to the magnetic head so that its cross section is U-shaped and supporting it so that it can be freely tilted in every direction. CONSTITUTION:The pad 34 is formed so that its cross section is U-shaped and supported to be freely tilted in every direction with respect to a shaft 40 by the action of a pivot 42. Thus, the magnetic recording layer of the film F is made to be along the gap part 33 of the magnetic head 32 when the magnetic head 32 is tilted in a film feeding direction. When the center of the head 32 is deviated from the center of the pad 34, the pad 34 is tilted in the film feeding direction and the front part 34A and the back part 34B of the pad 34 abut on the head 32, so that the magnetic recording layer of the film F is made to be along the head 32. When the head 32 is tilted in a direction orthogonal to the film feeding direction, the head 32 is tilted by the pivot 42 in a direction where it is tilted, so that the magnetic recording layer is made to be along the gap part 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head device for a photographic film, and more particularly to a magnetic head for a photographic film for magnetically recording and reproducing by pressing the magnetic recording layer of the photographic film being fed to the magnetic head with a pad. Regarding the device.

[0002]

2. Description of the Related Art A camera has been proposed in which a photographic film having a magnetic recording layer is used, and the date and time of photographing, photographing information and the like are written or read from a magnetic head at the time of photographing. The information recorded on the magnetic recording layer of the photographic film is used as information when the photographic film is developed and then photographed by an image sensor and reproduced on a monitor TV, or on the photographic paper. It is also used as information when burning.

Conventionally, as a magnetic head device for this type of photographic film, there is one disclosed in Japanese Patent Application Laid-Open No. 4-11237. This magnetic head device is configured such that a pad for pressing a magnetic recording layer against the magnetic head is swingable in the feeding direction of the photographic film, and has a cross section so as to be in contact with the front portion and the rear portion with a gap portion of the magnetic head interposed therebetween. Even if the magnetic head is formed in a U shape and the magnetic head is tilted with respect to the feeding direction of the photographic film or the center of the magnetic head is displaced from the center of the pad, the magnetic recording layer runs along the gap of the magnetic head. I am trying to make it.

[0004]

However, in the magnetic head device for a photographic film disclosed in Japanese Patent Laid-Open No. 4-11237, the magnetic head is in a direction other than the feeding direction of the photographic film (for example, the feeding of the photographic film). When it is inclined with respect to the direction orthogonal to the feeding direction), a gap is formed between the magnetic head gap and the magnetic recording layer, so that the magnetic recording layer cannot be reliably aligned with the gap portion. There is.

The present invention has been made in view of such circumstances, and the magnetic head is inclined with respect to the feeding direction of the photographic film, the center of the magnetic head is displaced from the center of the pad, and the magnetic head is To provide a magnetic head device for a photographic film, which can surely align the magnetic recording layer of the photographic film with the gap portion of the magnetic head even if the photographic film is inclined with respect to a direction other than the feeding direction. With the goal.

[0006]

In order to achieve the above object, the present invention provides a photographic film having a magnetic recording layer,
In a magnetic head device for a photographic film, wherein the magnetic recording layer of the photographic film being fed is pressed against the magnetic head by a pad biased by a spring to perform magnetic recording / reproduction, the pad is the magnetic head of the magnetic head. It is characterized in that it is formed in a U-shaped cross-section so as to contact the front part and the rear part of the magnetic head across the gap part, and is supported so as to be tiltable in all directions.

[0007]

According to the present invention, when the magnetic head is inclined with respect to the feeding direction of the photographic film, the pad has a cross section U.
Since it is formed in a letter shape, the magnetic recording layer of the photographic film can be aligned with the gap part of the magnetic head, and when the center of the magnetic head is displaced from the center of the pad, the magnetic head is Even when the magnetic head is inclined with respect to a direction other than the feeding direction, the magnetic recording layer of the photographic film can be surely aligned with the gap portion of the magnetic head.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a magnetic head device for a photographic film according to the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a structural diagram in which a magnetic head device for a photographic film according to the present invention is applied to a film image input device.

A film cartridge 12 is installed in the main body 10 of the film image input device shown by the chain double-dashed line in the figure. In the film cartridge 12, a developed still photo film F is wound around a spool 14 in advance, and the photo film F is fed by a film driving mechanism. The film drive mechanism is engaged with the spool 14 of the film cartridge 12, and is engaged with a film supply section that rotates the spool 14 in the forward / reverse direction, and with a take-up spool 18 of the film take-up chamber 16, and the film supply section is provided. The film winding section for winding the film F fed from the film F, and the film F arranged in the feeding path of the film F for nipping the film F between the capstans 20, 20 and the pinch rollers 22, 22 and feeding it at a constant speed. It is composed of a feeding section.

The film supply section drives the spool 14 of the film cartridge 12 in the clockwise direction in the figure, and the film is wound up on the spool 1 at the film winding section.
Film cartridge 1 until wound by 8
The film F is sent out from 2. Further, the film supply section is provided with a clutch mechanism for controlling the rotation of the spool 14, and the action of the clutch mechanism and the driving force of the capstans 20, 20 feeds the film F with a predetermined tension. It

The film F sent from the film cartridge 12 is guided to the capstan 20 via the magnetic head device 30. As shown in FIG. 2, the magnetic head device 30 has a magnetic head 32 disposed upward with a film F interposed therebetween.
Is provided, and a pad 34 is provided below. The magnetic head 32 is fixed to the main body 10.

On the other hand, the pad 34 is arranged in a recess 36 formed in the main body 10 and has a U-shaped cross section so that the front portion 34A and the rear portion 34B are in contact with the magnetic head 32 with the gap portion 33 interposed therebetween. Has been formed. Also, pad 3
As shown in FIGS. 2 and 3, a through hole 38 is formed in the film 4 in a direction orthogonal to the pressing direction P of the film F. A shaft 40 is inserted through the through hole 38, and a pivot 42 formed in the through hole 48 is engaged with a tapered groove portion 40A of the shaft 40 to support the pad 34 so as to be tiltable in all directions. is doing. Both ends of the shaft 40 protruding from the through hole 38 are guided by guide grooves 44, 44 formed in the upper edge of the recess 36, and abut on the upper end of the compression coil spring 45 arranged in the recess 36. Contacted. Therefore, the shaft 40 urges the pad 32 in the pressing direction P of the magnetic recording layer via the pivot 42 by the urging force of the spring 44.

As a result, the magnetic recording layer of the film F passing through the magnetic head device 30 is pressed against the gap portion 33 of the magnetic head 32 by the pad 34. The magnetic data of the magnetic recording layer read by the magnetic head 32 is reproduced by the magnetic recording / reproducing device 46 shown in FIG. 1 and displayed on the monitor TV 48. On the other hand, the CCD line sensor 50 is installed above the capstan 20, 20. This CCD line sensor 50 is a film F
The image of the film F being fed which is arranged in a direction orthogonal to the feeding direction of the sheet and is illuminated by the light source 52 is read via the taking lens 54. In addition, the CCD line sensor 50
The electric signal converted by the photoelectric conversion element is subjected to image processing by the image processing device 56, and then the monitor TV 48.
Output as a video signal. This allows the monitor TV
At 48, an image of the film F and an image recorded in the magnetic data are displayed.

Next, the operation of the magnetic head device for a photographic film constructed as described above will be described. When the magnetic head 32 is tilted by θ ° with respect to the film feeding direction as shown in FIG. 4, the pad 34 has a cross section U in this embodiment.
Since it is formed in a letter shape, the magnetic recording layer of the film F can be along the gap portion 33 of the magnetic head 32.

When the center of the magnetic head 32 is displaced from the center of the pad 34 by x as shown in FIG. 5, the pad 34 is acted by the pivot 42 in this embodiment.
Since it can be tilted in all directions with respect to the pad 3
4 inclines in the film feeding direction and the front portion 34A of the pad 34
Then, the rear portion 34B comes into contact with the magnetic head 32. As a result, in this embodiment, the magnetic recording layer of the film F can be along the magnetic head 32.

Further, when the magnetic head 32 is inclined with respect to a direction other than the film feeding direction, as shown in FIG. 6, for example, α ° with respect to the direction orthogonal to the film feeding direction.
When tilted, the magnetic head 32 tilts in the tilted direction by the pivot 42, so that the magnetic recording layer of the film F can be along the gap 33 of the magnetic head 32.

Therefore, in this embodiment, even if the magnetic head 32 is tilted or misaligned, the magnetic recording layer of the film F can be surely aligned with the gap portion 33 of the magnetic head 32. Information can be stably written in the recording layer. Further, in this embodiment,
Since the shaft 40 of the pad 34 is supported by one coil spring 45, it is possible to use a coil spring 45 which is different from that in which separate springs are attached to both ends of the shaft.
The pad 34 can be stably supported. That is, if separate springs are attached to both ends of the shaft, the pad 34
It does not tilt stably due to a slight difference in spring constant of each spring.

In this embodiment, the magnetic head device for a photographic film applied to the film image input device has been described, but the present invention is not limited to this and may be applied to a camera having a magnetic head. In this case, the magnetic head of the camera records magnetic data on the magnetic recording layer of the photographic film before development.

[0019]

As described above, according to the magnetic head device for a photographic film according to the present invention, the pad is formed in a U-shaped cross section and is supported so as to be tiltable in all directions. Even if the photo head is tilted with respect to the feeding direction, the center of the magnetic head is displaced from the center of the pad, or the magnetic head is tilted with respect to a direction other than the feeding direction of the photo film, The magnetic recording layer can be reliably aligned with the gap of the magnetic head.

[Brief description of drawings]

FIG. 1 is a structural diagram showing an embodiment in which a magnetic head device for a photographic film according to the present invention is applied to a film image input device.

FIG. 2 is a side view showing an embodiment of a magnetic head device for a photographic film according to the present invention.

FIG. 3 is a sectional view taken along line 3-3 in FIG.

FIG. 4 is an explanatory view when the magnetic head is inclined with respect to the film feeding direction.

FIG. 5 is an explanatory diagram when the centers of the magnetic head and the pad are displaced from each other.

FIG. 6 is an explanatory view when the magnetic head is inclined with respect to a direction orthogonal to the film feeding direction.

[Explanation of symbols]

 10 ... Film image input device main body 12 ... Film cartridge 30 ... Magnetic head device 32 ... Magnetic head 34 ... Pad 40 ... Shaft 42 ... Pivot 45 ... Compression coil spring F ... Film

Claims (1)

[Claims] 1. A photographic film in which a photographic film having a magnetic recording layer is fed, and the magnetic recording layer of the photographic film being fed is pressed against a magnetic head by a pad biased by a spring for magnetic recording and reproduction. In a magnetic head device for use with the magnetic head, the pad is formed in a U-shaped cross section so as to contact the front and rear portions of the magnetic head with a gap portion of the magnetic head interposed therebetween, and the pad is tiltably supported in all directions. A magnetic head device for a photographic film, which is characterized in that