JPS6286577A - Rotating magnetic sheet device - Google Patents

Abstract

PURPOSE:To constantly make a head touch of a magnetic head even and make a regulation board compact by attaching the regulation board to a head carriage and moving the regulation board together with the magnetic head. CONSTITUTION:When a magnetic sheet pack 10 is inserted into a bucket 26 and an upper cover 28 is pressed down toward a main body 24, the bucket 26 is gradually closed and a drive shaft 32 is fitted into a center core 32. Under such a state, a regulation board 52 is situated at a position capable of bringing into contact with a magnetic sheet 12 and opposed to a magnetic head 42 holding the magnetic sheet 12 therebetween. Accordingly, the magnetic sheet 12 is moved along the magnetic head 42 by an operation of the regulation board 52 to magnetically record and reproduce. When a head carriage 38 is fed by a rotation of a lead screw 36 from such a state, the magnetic head 42 and the regulation board 52 move laterally to carry out a magnetic recording and reproducing to the magnetic sheet 12. Since the regulation board 52 and the magnetic head 42 move together, the head touch of the magnetic head 42 is constantly fixed, and the regulation board 52 is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to a rotating magnetic sheet device, and particularly to a rotating magnetic sheet device used as a magnetic recording/reproducing device in an electronic still camera or the like.

[Background of the invention]

Recently, imaging devices such as solid-state image sensors and image pickup tubes are combined with recording devices that use magnetic sheets, which are inexpensive and have a relatively large storage capacity, to take purely electronic still photographs of subjects using rotating magnetic sheets. An electronic still camera system has been developed and is attracting attention, in which the images are recorded on the screen and played back using a separate television system or printer.

The magnetic sheets used in such systems are usually in the form of magnetic sheet packs. The magnetic seat back rotatably accommodates a magnetic sheet for magnetically recording still image information, etc., and is used by being attached to a rotating magnetic sheet device built into an electronic camera.

When attaching a magnetic sheet pack to a magnetic recording device or reproducing device in an electronic camera, connect the center hole provided in the center core of the magnetic sheet in the magnetic sheet pack directly to the rotational drive shaft of the magnetic recording or reproducing device. Attaching the magnetic sheet pack is troublesome and inconvenient, and there is a possibility that the magnetic sheet pack cannot be accurately attached to the magnetic recording or reproducing device.

In order to eliminate such troubles, a magnetic sheet pack attachment/detachment device has been proposed. By inserting the magnetic sheet pack into the bucket and then closing the bucket, the magnetic sheet of the magnetic sheet pack inside the bucket is attached to the rotational drive shaft of the apparatus main body. A center core is provided in the center of the magnetic sheet, and the rotation drive shaft is fitted into the center hole of the center core to rotate the magnetic sheet in the magnetic sheet pack.

Unlike ordinary floppy disks, the magnetic sheets used in such electronic cameras are recorded at high density and rotate at high speed, so the head/throat touch is different from ordinary floppy disks in which the disk is pressed against the magnetic head side with a pad. different. That is, as shown in FIGS. 8 and 9, in the case of an electronic camera or the like, a regulating plate 4 having a concave portion 2 is arranged on the opposite side of the magnetic head 42 with the magnetic sheet 12 in between. By positioning the magnetic sheet 12 at a predetermined position relative to the magnetic head 42, the magnetic sheet 12 is made to run along the magnetic head 42. The effect of the regulation plate 4 makes it possible to reduce the rotational torque compared to the case of pressing with a normal floppy disk pad. However, in the rotary magnetic recording and reproducing apparatus, the magnetic sheet 12 is always placed in contact with the outermost peripheral portion 4A of the regulating plate 4, and the magnetic head 42 is positioned in the recess 2 of the regulating plate 4 and moves while being in contact with the magnetic sheet 12. At this time, the pressing force (head touch) of the magnetic head 42 against the magnetic sheet 12 changes between the outer circumferential side and the inner circumferential side of the magnetic sheet 12. This change in head touch adversely affects image quality during magnetic recording and reproduction. Further, in such a rotating magnetic recording/reproducing device, the magnetic head 42
An installation space for the regulating plate 4 having a length corresponding to the entire movement stroke of is required in a device such as an electronic camera, but this is an impediment to miniaturization of electronic cameras and the like.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and an object of the present invention is to propose a rotating magnetic sheet device in which the pressing force of the magnetic head against the magnetic sheet does not change and the space for the regulating plate can be reduced. There is.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention provides a magnetic recording/reproducing device that performs magnetic recording or reproduction on a magnetic sheet rotatably housed in a magnetic sheet pack, which is equipped with a magnetic head and has a radial direction of the magnetic sheet. A head carriage that moves to perform magnetic recording and reproduction on a magnetic sheet by a magnetic head, and a center core that houses the magnetic sheet pack and is provided at the center of rotation of the magnetic sheet stored in the magnetic sheet pack on the main body side. A bucket that guides the magnetic sheet pack to a position where it fits with the rotational drive shaft, a regulation plate that is provided at the tip of a swinging arm that is pivotally supported by the head carriage and is biased by the magnetic sheet, and that operates in conjunction with the bucket. The present invention is characterized by comprising a support member that moves to align the regulating plate along the magnetic sheet during magnetic recording and reproduction, and retracts the regulating plate from the magnetic sheet when the bucket is opened.

〔Example〕

FIG. 6 shows a plan view of a magnetic sheet pack used in a magnetic recording/reproducing device such as an electronic camera, and FIG. 7 is a sectional view taken along line A--A in FIG. 6. As shown in FIG. 6, the magnetic sheet pack 10 has a substantially rectangular shape, and a magnetic sheet 12 on which still image information and the like are recorded is rotatably housed inside. A center core 14 as a reinforcing member is provided in the center of the magnetic sheet 12, and this center core 14 is exposed to the outside through a circular opening 16 of the magnetic sheet pack 10. A center hole 15 is formed in this center core 14, and an elastic piece (not shown) is formed in this center hole 15, and a drive shaft 32, which will be described later, is fitted into the center hole 15 of the center core 14 against the biasing force of this elastic piece. It is supposed to be done. A window 18 in which a magnetic head, which will be described later, is located is opened in the magnetic sheet pack 10, and this window 18 for the magnetic head is opened and closed by a slideable shutter 20. That is, the shutter 20 is the magnetic sheet pack 10
Before the magnetic sheet 12 is inserted into the bucket described later, the window 18 is closed to prevent dust from adhering to the magnetic sheet 12, and when the magnetic sheet 12 is inserted into the bucket described later, the shutter 20 moves downward in FIG. Then, the head window 18 is opened, and recording and reproduction on the magnetic sheet 12 becomes possible. magnetic sheet bank 1
0, a locking recess 22 is formed at the opposite end of the shutter 20, and this recess 22 is used for temporarily securing the magnetic sheet pack 10 when it is inserted into a bucket.

FIG. 1 shows the external structure of the magnetic recording and reproducing device, which is composed of a main body 24, a bucket 26, and an upper lid 28. As shown in FIG. First, the internal structure of the device body 24 will be explained. A motor 30 for driving a magnetic sheet is disposed inside the device body 24, and a drive shaft 32 of this motor 30 is connected to the center core 14 of the magnetic sheet pack 10 shown in FIG. The magnetic sheet 12 is inserted into the center hole 15 and rotated within the magnetic sheet pack 10 at a predetermined number of rotations. Further, in FIG. 1, 34 is a motor for feeding the magnetic head, and 36 is this motor 3.
4, a lead screw connected to the output shaft; 3, a head carriage that is threadedly engaged with the lead screw 36 and is guided and moved by a guide shaft 40;
42 is a magnetic head provided on the head carriage 38. Therefore, when the motor 34 is rotated at a predetermined number of rotations, the head carriage 38 is moved at a predetermined pitch in the axial direction of the guide shaft 40 by the rotation of the lead screw 36, and thereby the magnetic head 42 is moved in the radial direction of the magnetic sheet 12. The still image information can be recorded or reproduced track by track on the magnetic sheet 12.

A bracket 44 is provided at the end of the apparatus main body 24, and a bucket 26 and an upper lid 28 are pivotally supported on the bracket 44 via pins 46. The upper lid 28 is configured to have a shape capable of housing the bucket 26 as shown in the figure. The upper lid 28 is biased in the opening direction by a spring (not shown) with respect to the apparatus main body 24, and the upper lid 28 and the bucket 2
Another spring (not shown) is disposed between the bucket 26 and the top lid 28, and this spring biases the bucket 26 in a direction away from the top lid 28. Therefore, as shown in FIG. 1, when the upper lid 28 is open, the bucket 26 is separated from the apparatus main body 24 and the upper lid 28, and the magnetic sheet pack insertion opening 47 of the bucket 26 is opened.

On the surface of the bucket 26 facing the main body 24, there are a rotating shaft 32 provided on the main body 24, a magnetic head 42, and a positioning pin (not shown) provided on the main body 24 for positioning the main body 24 and the magnetic sheet pack 10. Each hole has a hole into which a piece (1) can be inserted.

A locking member (not shown) is arranged at the side end of the bucket 26, and this locking member fits into the recess 22 of the magnetic sheet pack 10 inserted into the bucket 26, and the magnetic sheet pack 1
0 into the bucket 26 temporarily.

Next, the mounting structure of the regulation plate 52 will be explained with reference to FIG. The regulating plate 52 is provided at the tip of the regulating plate holder 48, and the regulating plate holder 48 is pivotally supported by the upper end 42A of the head carriage 42 via a pin 50. Regulating plate holder 4
8 is biased counterclockwise in FIG. 2 by a spring 54.

On the other hand, an oval-shaped support member 56 hangs down from the back surface of the upper lid 28, as shown in FIG. A side edge of the regulation plate holder 48 is supported in contact with an end portion 56A of the support member 56. That is, the regulation plate holder 48 is supported by the support member 56 against the counterclockwise rotation urging force of the spring 54. As a result, the regulating plate 52 moves up and down in conjunction with the opening and closing operations of the upper cover 28. That is, when the upper lid 28 is closed, the regulating plate 52 is lowered to a position where it can come into contact with the magnetic sheet 12, and when the upper lid 28 is opened, the regulating plate 52 is separated from the magnetic sheet.

The operation of the embodiment of the rotating magnetic sheet device according to the present invention constructed as described above is as follows. First, to load the magnetic sheet pack 10, open the top lid 28 shown in FIG.
When the magnetic sheet pack 10 is inserted into the bucket 26 in the open position B, the magnetic sheet pack 10 is temporarily fixed within the bucket 26 by a not-shown engagement member. Next, in this state, when the top cover 28 is pushed down toward the main body 24, the bucket 2
6 gradually closes, and the drive shaft 32 is fitted into the center core 14 as shown in FIG. In this state, as shown in FIGS. 4 and 5, the regulating plate 52 is in a position where it can come into contact with the magnetic sheet 12 and is also in a position facing the magnetic head 42 with the magnetic sheet 12 in between.

Therefore, in the state shown in FIGS. 4 and 5, the magnetic sheet 12 is aligned with the magnetic heald 42 by the action of the regulating plate 52, and is in a state in which magnetic recording and reproduction are possible.

When the head carriage 38 is moved from this state by the rotation of the lead screw 36, the magnetic head rad 42 and the regulation plate 5
2 moves in the left-right direction and performs magnetic recording and reproduction on the magnetic sheet 12.

In the above embodiment, the regulating plate 52 is attached to the head carriage 3.
8, it moves together with the magnetic head 42. Therefore, the head touch of the magnetic head 42 is always constant, and the image quality does not change between the outer and inner circumferences of the magnetic sheet 12.

Also, since the regulating plate 52 moves together with the magnetic head 42,
The length corresponding to the movement stroke of the magnetic head 42 is necessary (the size of the regulating plate 52 can be reduced).

In the embodiment, the upper lid 28 and the bucket 26 are connected to the main body 2 of the apparatus.
4, the hinge type loading system is rotatably supported, but the present invention is also applicable to the front loading system of a slot incubator in which the top lid and bucket are guided in parallel by a cam groove and move up and down. can.

〔Effect of the invention〕

As explained above, according to the rotating magnetic sheet device according to the present invention, since the regulating plate is attached to the head carriage, the regulating plate moves together with the magnetic head, and a uniform head touch can always be obtained. Furthermore, the regulation plate does not need to have a length corresponding to the movement stroke of the magnetic head, and its size can be reduced.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of the embodiment according to the present invention with the top lid open, FIG. 2 is a partial front cross-sectional view of the embodiment of the present invention with the top lid open, and FIG. FIG. 4 is a partial side sectional view of the embodiment of the present invention with the top lid closed. FIG. 5 is a partial front view of the embodiment of the present invention with the top lid closed. A plan view of the magnetic sheet pack, FIG. 7 is a plan view of the magnetic sheet pack taken along line A-A in FIG.
FIG. 8 and FIG. 9 are a perspective view and a sectional view showing a conventional regulating plate. DESCRIPTION OF SYMBOLS 10... Magnetic sheet pack, 12... Magnetic sheet, 14... Center core, 24... Main body of magnetic recording or reproducing device, 26... Bucket,
28...Top lid, 32...Drive shaft, 38...
Head carriage, 42...Magnetic head, 48.
... Regulating plate holder, 52... Regulating plate, 56...
Support member.

Claims (1)

[Claims] (1) A magnetic recording/reproducing device that performs magnetic recording or reproduction on a magnetic sheet rotatably housed in a magnetic sheet pack is equipped with a magnetic head and moves in the radial direction of the magnetic sheet. A head carriage for magnetic recording and reproducing and a center core that houses the magnetic sheet pack and is provided at the center of rotation of the magnetic sheet stored in the magnetic sheet pack are brought to a position where they are fitted with a rotational drive shaft on the main body side. A bucket that guides the magnetic sheet pack, a regulating plate that is provided at the tip of a swinging arm that is pivotally supported by the head carriage and is biased toward the magnetic sheet, and a regulating plate that moves in conjunction with the bucket during magnetic recording and reproduction. a support member that aligns the regulation plate with the magnetic sheet and retracts the regulation plate from the magnetic sheet when the bucket is opened;
A rotating magnetic sheet device comprising: