JPS61237259A - Rotary magnetic sheet device - Google Patents

Abstract

PURPOSE:To effectively attach a center core to a driving shaft by providing a core pressing member in a bucket accommodating a magnetic sheet pack and pressing the center core of the magnetic sheet to the driving shaft by the pressing member in opening and closing operation of a cover during a loading. CONSTITUTION:In a device main body 24, a motor 30 for driving a magnetic sheet is disposed, a driving shaft 32 of the motor 30 is fitted into a center opening 15 of a center core 14 of a magnetic sheet pack 10 to rotate a magnetic sheet 12 in the pack 10. An upper cover 28 is constructed in a form capable of accommodating a bucket 26. On an upper surface of the bucket 26, a core pressing section 26B for the core 14 is formed. During loading the pack 10, the core 14 is pressed toward the driving shaft 32 side by the pressing section 26B and the core 14 of the sheet 12 maintaining a slight space to the pack 10 is effectively mounted on the driving shaft 32. In this manner, the effective mounting can be done.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a rotating magnetic sheet device, and more particularly to a rotating magnetic sheet device used as a magnetic recording/reproducing device such as an electronic still camera.

[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 images are recorded on the camera and images are 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 seed pack rotatably stores 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 bank into the bucket and then closing the bucket, the magnetic sheets of the magnetic sheet pack in the bucket are 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.

By the way, the center core of the magnetic sheet needs to be accurately attached to the rotation drive shaft, and if this attachment is insufficient, there is a risk that the magnetic head will not accurately record or reproduce signals on the magnetic sheet. There is a risk of adversely affecting magnetic heads and the like. For this reason, the conventional attachment/detachment device for magnetic sheet packs involves fitting the rotary drive shaft with the center hole of the center core of the magnetic sheet, attaching a magnet to the rotary drive shaft, and attracting the center core toward the drive shaft by magnetic force. A magnetic chuck method has been proposed, but even this method is not expected to be sufficiently effective.

Furthermore, in the center core of this type of magnetic sheet, an elastic piece is formed in the center hole into which the drive shaft is inserted, and unless the center core is pressed against the drive shaft with a predetermined pressing force, the center core will resist the biasing force of the elastic piece. is not installed correctly on the drive shaft.

For this reason, the rotary magnetic sheet device is equipped with a lid along with the bucket, and a push pin is provided on the lid. During loading, the lid is pushed down slightly from the normal position (recording position) toward the drive shaft (overstroke position). It is conceivable to attach the center core to the drive shaft by pressing the center core against the drive shaft using a push pin on the lid side. However, when pressing the center core against the drive shaft by such an overstroke operation, there is a risk that if the lid is accidentally overstroked during recording, the push pin will come into contact with the center core and damage the center core.

Furthermore, in Japanese Patent Application Laid-Open No. 59-218681, a push pin is provided on the lid side via a temporary spring, and a member for regulating the movement of the push pin is provided on the bucket side, so that the center core is stopped by the push pin during the lid closing operation. While being pressed against the drive shaft, the plate spring is deformed and retracted by the regulating member when the lid is in the closed position, and the push pin is retracted to a position where it does not come into contact with the center core. However, the rotating magnetic sheet device has a problem in that the positional relationship between the regulating member and the push pin is complicated. In addition, the eject push pin always pushes the center core while the lid is in the open state, but this center core pushing operation places a load on the center core and drive shaft, which may cause deformation of the center core and drive shaft. There is a problem with this, resulting in poor accuracy.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it is an object of the present invention to propose a rotating magnetic sheet device in which the center core of the magnetic sheet can be accurately attached to the rotational drive shaft when loading a magnetic sheet pack.

[Summary of the invention]

In order to achieve the above object, the present invention provides a magnetic sheet pack that is rotatably stored in a magnetic sheet pack and is stored with a gap between it and the magnetic sheet pack so that it can be moved a minute distance in the direction of the rotation axis. In a magnetic recording and reproducing device that performs magnetic recording or reproduction on a sheet, the magnetic sheet pack is stored with a gap maintained so as to be movable in the direction of the rotation axis, and the magnetic sheets stored in the magnetic sheet pack are a bucket that guides the magnetic sheet pack to a position where the center core provided at the center of rotation is fitted with the rotational drive shaft on the main body side; a core pushing portion provided on the bucket; The present invention is characterized by comprising a biasing device that biases the bucket, and a holding mechanism that holds the bucket until the center core is pressed toward the drive shaft by the core pushing portion and releases the bucket after the center core is pushed.

〔Example〕

Preferred embodiments of the rotating magnetic sheet device according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 9 shows a plan view of a magnetic sheet pack used in magnetic recording and reproducing devices such as electronic cameras, and FIG.
It is a sectional view taken along line XX in the figure. As shown in FIG. 9, the magnetic sheet pack has a substantially rectangular shape, and a magnetic sheet 12 on which still image information and the like are recorded is rotatably housed inside the pack. A center core 14 as a reinforcing member is provided in the center of the magnetic sheet 12, and this center core 14 is connected to the circular opening 1 of the magnetic seat back 10.
6 is exposed to the outside. 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, 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 looks like this. The magnetic sheet 12 can be moved within the magnetic sheet pack 10 by a small distance in the direction of the rotation axis.

A window 18 in which a magnetic head, which will be described later, is located is opened in the magnetic seat back 10, and this window 18 for the magnetic head is opened and closed by a slideable shutter 20. That is, the shutter 20 closes the window 18 to prevent dust from adhering to the magnetic sheet 12 before the magnetic seat back 10 is inserted into the bucket described later, and when the magnetic sheet back 10 is inserted into the bucket described later, the shutter 20 closes the window 18 to prevent dust from adhering to the magnetic sheet 12. The head window 18 is moved downward in FIG. 9 to open the head window 18, and recording and reproduction on the magnetic sheet 12 becomes possible. In the magnetic sheet pack 10, a locking recess 22 is formed at the opposite end of the shutter 20.
This recess 22 is used for temporarily fixing the magnetic sheet pack 10 when it is inserted into a bucket.

In FIG. 1, a magnetic recording/reproducing apparatus is shown, and the magnetic recording/reproducing apparatus 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, 36 is a lead screw connected to the output shaft of this motor 34, and 38 is screwed into this lead screw 36 and moves while being guided by a guide shaft 40. A head carriage 42 is a magnetic head provided above the head carriage. 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 shirt 40 by the rotation of the lead screw 36, and thereby the magnetic head 42 is moved at a predetermined pitch. The still image information can be recorded or reproduced on the magnetic sheet 12 one trunk at a time.

A bracket 44.44 (only the left side is shown) 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 44.44 via a pin 46. The upper lid 28 is configured to have a shape capable of housing the bucket 26 as shown in the figure. Furthermore, a regulating plate holder 48 is attached to the upper lid 28 via four pins 50, 50, 50, 50 (only one is shown in FIG. 1), and a regulating plate (not shown) is attached to this regulating plate holder 48. It will be done. The regulating plate faces the magnetic head with the magnetic sheet 12 in between during recording or reproduction, and has the function of aligning the magnetic sheet 12 along the magnetic head 42. The upper lid 28 is biased in the opening direction with respect to the device main body 24 by a spring 31 shown in FIG.
5 is disposed, and this spring 25 biases the bucket 26 in a direction away from the main body 24. Therefore, as shown in FIG. 1, when the top cover 28 is open, the bucket 2
6 separates from the apparatus main body 24 and the upper lid 28 to open the magnetic sheet pack insertion opening 27 of the bucket 26.

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 for positioning the main body 24 and the magnetic sheet pack 10. ) into which each hole 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. A core pressing portion 26B for pressing the center core is formed on the upper surface of the bucket 26. Further, the bucket 26 is formed so that the magnetic sheet pack 10 can be freely moved in the direction of the rotation axis. The bucket 26 is provided with a leaf spring 26A, which urges the magnetic sheet pack 10 downward in FIG. 2 within the bucket 26.

Next, the bucket holding mechanism will be explained.

As shown in FIG. 1, a locking lever 56 is attached to the side surface 28A of the upper lid 28 via a pin 58. As shown in FIG. 4, the locking lever 56 is attached to a pin 58 and biased toward the side surface 28A of the upper M2B via a spring 60. Further, a step portion 62 is formed on the locking lever 56,
This stepped portion 62 allows the pin 54 protruding from the side edge of the bucket 26 to be pushed down.

The pin 5 of the bucket 26 is attached to the protruding piece on the side surface 28A of the outer lid 28.
A guide groove 29 is formed in which the guide groove 2 is guided.
9, its upper end position is the locking lever 56 as shown in FIG.
It is formed to a position that extends beyond the stepped portion 62 of and overlaps a part of the locking lever 56. On the other hand, the side surface 2 of the main body 24
4A is provided with a release member 64, which releases the locking lever 56 from the side surface 28A against the urging force of the spring 60 when the upper M2B is in the closed state, and locks the locking lever 56 with the pin 54 of the bucket 26. The lever 56 is disengaged from the stepped portion 62, and the pin 54 of the bucket 26 is moved to the upper end position of the guide groove 29.

Further, a lock pin 66 is protruded from the side surface 28A of the upper lid 28 adjacent to the locking lever 56, and this lock pin 66 is provided adjacent to the locking lever 56.
6 is a lock lever 6 provided on the side surface 24A of the main body 24
It is locked by 8. That is, the lock lever 68 is formed in an oval shape, is supported by a pin 70 on the side surface 2''4A, is biased counterclockwise by a spring 72, and is positioned at the position shown in the figure by a regulating pin 74. The lock lever 68 has a tapered surface 76 formed at its tip and a lock portion 78. Therefore, the top cover 28 is closed and the lock pin 66 comes into contact with the tapered surface 76 of the lock lever 68. When the upper M28 is closed from this state, the lock lever 68 rotates clockwise against the urging force of the spring 72, and the lock bin 6
6 is fitted into the lock part 78, and the top cover 28 is moved to the lock lever.
68 to be locked in the closed state.

The operation of the embodiment of the rotating magnetic sheet device according to the present invention constructed as described above is as follows.First, in order to load the magnetic sheet pack 10, the upper lid 28 shown in FIG.
When the magnetic sheet pack 10 is inserted into the bucket 26 in the open state, the magnetic sheet pack 10 is temporarily fixed within the bucket 26 by a locking member (not shown).

In this state, the pin 54 of the bucket 26 is located near the upper end of the guide groove 29 and is in contact with the step 62. When the upper lid 28 is pushed down toward the main body 24 in this state, the center core of the magnetic sheet 12 14 is attached to the drive shaft 32. When the upper lid 28 is still pushed down in this state, the guide pin 54 is pushed down by the stepped portion 62 of the locking lever 56, and as a result, the core pressing portion formed on the upper surface of the bucket 26 as shown in FIG. 26B presses the center core 14 toward the drive shaft 32, and the center core 14 of the magnetic sheet 12, which maintains a small gap with the magnetic sheet pack 10, is reliably attached to the drive shaft 32. In this state, the lock pin 66 of the upper lid 28 is just before being locked by the lock lever 68, and is in contact with the tapered portion 76 of the lock lever 68, as shown in FIG.

When the upper lid 28 is further pushed in from this state, the tip 56A of the locking lever 56 engages with the release member 6 as shown in FIG.
It comes into contact with 4. When pressed further from this state, the locking lever 56 resists the biasing force of the spring 60 and separates from the side surface 28A, as shown in FIG. The retaining relationship with the pin 54 is removed, the bucket 26 is moved upward by the biasing force of the spring 25, and the core pressing portion 26B is brought into a non-contact state with the center core 14 of the magnetic sheet 12. FIG. 8 shows this state, and magnetic recording and reproduction are possible in this state. In this state, as shown in FIG. 6, the lock pin 66 of the upper lid 28 is locked by the lock portion 78 of the lock lever 72, and the upper lid 28 is in a locked state.

To release the upper lid 28, the locking lever 68 is rotated clockwise to release the locking of the lock bin 66, whereby the upper lid 28 and the bucket 26 are separated from the main body 26 of the apparatus.

According to the embodiment described above, the bucket 26 is provided with the core pressing part 26B, and during the closing operation of the upper lid 28, the core pressing part 26B comes into contact with the center core 14 and presses the center core toward the drive shaft 32. Therefore, the center core 14 is reliably attached to the drive shaft 32. Further, the upper lid 28 can attach the center core 14 to the drive shaft 32 without passing through the overstroke position.

Furthermore, in the embodiment, the upper lid 2 is pivotally supported on the device main body 24.
By closing the center core 1 of the magnetic sheet 12
4 is inserted into the rotational drive shaft 32 on the device main body 24 side.
Alternatively, the present invention can also be applied to a device in which the bucket 26 descends perpendicularly to the device main body 24 (such as a mechanism called a slot-in type in front loading).

〔Effect of the invention〕

As explained above, according to the rotating magnetic sheet device according to the present invention, a core pressing member is provided in the bucket that stores the magnetic sheet pack, and when loading the magnetic sheet bank into a magnetic recording or reproducing device, the lid can be closed. Since the pressing member presses the center core of the magnetic sheet against the drive shaft, the center core of the magnetic sheet can be reliably attached to the drive shaft.

Further, when unloading the magnetic sheet bank from the magnetic recording or reproducing apparatus, the lid can be opened without overstroke operation, so that the lid can be opened with a small operating force. Furthermore, when ejecting, the core pressing member does not push the center core again (it is ejected), and it is possible to minimize deterioration in accuracy due to wear of the center core drive shaft.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the overall structure of an embodiment of the present invention;
FIG. 2 is a side sectional view of the embodiment according to the present invention during the top cover closing operation, FIG. 3 is a front view of the bucket holding mechanism of the embodiment of the present invention, and FIG. 4 is a sectional view of the same bucket holding mechanism. FIG. 5 is a side sectional view showing the center core pushing state of the embodiment according to the present invention, FIG. 6 is a front view of the bucket holding mechanism in the magnetic recording/reproducing state, FIG. 7 is a sectional view of the bucket holding mechanism, and FIG.
9 is a plan view of the magnetic sheet pack, and FIG. 10 is a plane view of the magnetic sheet pack taken along the line X-X in FIG. 9. It is a diagram.

Claims (1)

[Claims] Magnetic recording or reproduction is performed on a magnetic sheet that is rotatably stored in a magnetic sheet pack and is stored with a gap between the magnetic sheet pack and the magnetic sheet pack so as to be movable a minute distance in the direction of the rotation axis. In a magnetic recording and reproducing device that performs a bucket that guides the magnetic sheet pack to a position where the center core is fitted with the rotary drive shaft on the main body side; a core pushing portion provided on the bucket; and a biasing device that biases the bucket in a direction opposite to the drive shaft side. and a holding mechanism that holds the bucket until the center core is pressed toward the drive shaft by the core pushing part and releases the bucket after the center core is pushed.