JPS59198561A - Rotary magnetic sheet device - Google Patents

Abstract

PURPOSE:To load surely a magnetic sheet by pressing and approaching a center core to a position at which a rotary stand can adsorb the center core and also providing a center core pressing member not disturbing the turning of the magnetic sheet. CONSTITUTION:A center core 9 of the magnetic sheet 6 is provided to a regulating plate 19 when a jacket holder 4 is not closed completely and depressed by a projection 37 and coil iron cores 35a, 35b energized from a compression spring 31. Thus, the center core 9 is pressed by the projection 37 and the iron cores 35a, 35b attended with cover closing of the jacket holder 4 so as to be fitted surely with a spindle 11 against the friction force between a through hole 9a and the center spindle 11. Further, the center core 9 is approached to a position where the magnetic force of the permanent magnet 10a of the rotary stand 10 has overcome the said friction force, adsorbed by the magnet 10a and adsorbed and fixed to the rotary stand 10.

Description

[Detailed Description of the Invention] <Industrial U Field> The present invention relates to a main body provided with a magnetic recording and/or reproducing device, and a jacket holder provided on the main body so as to be rotatably openable and closable via a hinge mechanism. A magnetic sheet cage in which a magnetic sheet serving as a magnetic recording medium is rotatably housed.
The present invention relates to a rotating magnetic sheet device in which the gutter is housed in the jacket holder, and the magnetic sheet is attached to the main body when the holder is closed.

BACKGROUND TECHNOLOGY AND PROBLEMS> A magnetic sheet conventionally used as a recording medium in a rotating magnetic sheet device consists of a disk having an annular recording surface formed with a center core having an insertion hole at the center of rotation. be.

The main body of the rotating magnetic sheet device is provided with a center spindle that is inserted into the insertion hole and serves as the center of rotation of the magnetic sheet, and a rotary table for rotating the magnetic sheet 1-.

The rotary table is provided with an attracting and fixing member such as a permanent magnet for attracting and fixing the center core,
The magnetic seam 1- is fixed to the rotating table by adsorbing, for example, a circular metal plate provided on the center core. Therefore, the magnetic sheet rotates about the center spindle as the rotary table rotates.

By the way, the insertion hole provided in the center core is provided with a resilient member or a tapered portion so that the magnetic sheet is not eccentric with respect to the center spindle, and when inserting the center spindle, It has a certain fitting friction force and slides into contact with the spindle so that it fits into the spindle. Moreover, since the magnetic sheet is attached to the main body when the cover of the jacket holder, which is rotatably provided on the main body via a hinge mechanism, is closed, the insertion hole and the center spindle are connected to each other. When fitting, the insertion hole is fitted with a slight inclination in the axial direction of the spindle, and the above-mentioned fitting frictional force becomes larger. Further, the adsorption force of the adsorption/fixing member such as a permanent magnet provided on the rotary table must be of such an extent that it does not affect signal recording or reproduction of the rotating magnetic sheet device.

Therefore, for this reason, there is a possibility that the attraction and fixation of the center core and the rotary table may be hindered by the above-mentioned fitting friction force. In other words, the center core stops in the middle of the center spindle due to this fitting friction force, and the center core and the rotary table cannot come close enough to be attracted by the above-mentioned attraction force. It turns out. Therefore, the rotating magnetic sheet device is operated while the magnetic sheet is not fully installed, causing recording leakage and the like.

<Object of the Invention> Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and includes a method of pressing the center core of a magnetic sheet to a position where it can be attracted to a rotary table to approach it, and at the same time preventing the rotation of the magnetic sheet. It has a pressing member that does not cause such problems,
An object of the present invention is to provide a rotating magnetic sheet 1 to a device that can securely attach a magnetic sheet.

<Summary of the Invention> In other words, in order to achieve the above-mentioned object, the rotating magnetic sheet device of the present invention has a magnetic sheet that fits and locks into the center core of a magnetic sheet rotatably housed in a magnetic sheet jacket. a rotary table having a center spindle and a suction fixing member disposed relative to the core;
A main body is provided with the rotary table and a magnetic head for recording and reproducing data in sliding contact with the magnetic sheet, and the magnetic sheet jack I- is arranged so as to be rotatably openable and closable via a hinge mechanism with respect to the main body. and a seat jacket holder for attaching to and detaching from the rotary table, which is elastically supported by the jacket holder and comes into contact with the center core when the holder is closed, thereby causing the core to be attracted by at least the adsorption fixing member. The center is provided so as to protrude so that it can be pressed to a position where the force exceeds the fitting friction force between the center spindle and the core, and the center is held in a state separated from the core after being suction-fixed by the suction-fixing member. A feature is that a core suppressing member is provided.

<Example> Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a state before a magnetic sheet jacket is inserted into a jacket holder constituting a rotating magnetic sheet device.

In FIG. 1, a jacket holder 4 into which a magnetic sheet jacket 3 can be inserted and removed is rotatably attached to a main body 2 on which a magnetic recording device 1 is placed via a hinge shaft 4a.

A disk-shaped magnetic sheet is rotatably housed in the case 5 of the magnetic sheet jacket jacket 1, and on this sheet 6, video signals such as still image information are stored in a plurality of annular shapes. It is designed to be magnetically recorded to form a rack. A window 7 is formed in a part of the jacket housing 5 so that a part of the magnetic recording surface 6a of the magnetic sheet 6 is exposed to the outside. One or more (one in this embodiment) magnetic head 8 provided on the main body 2 side is inserted into the window 7, and the above-mentioned magnetic recording is performed on the magnetic sheet 6. It looks like this. Further, a center core 9 is provided at the center of rotation of the magnetic sheet 6 so as to face outside through a hole 9A provided in the center of the casing 5 of the magnetic sheet jacket 3.

At approximately the center of the center core 9, an insertion hole 9a is provided in which a center spindle 11, which is provided on the main body 2 side and serves as a rotation axis of the magnetic sheath 1-5, is inserted.

In order to prevent eccentricity between the center spindle 11 and the magnetic sheet 6, this insertion hole 9a is formed, for example, in a substantially pentagonal shape as shown in the figure, and has an elastic spring 9b, so that it can be fitted with the center spindle 1z11. The magnetic sheet 6 can be positioned relative to the center spindle 11. Note that the center core 9 is provided with an annular metal plate 9C, which will be described later.
(See Figure 3).

Further, the main body 2 is provided with a center spindle 11 to which the above-described magnetic sheet 6 is fitted and attached, and which serves as a center of rotation of the sheet 6, and a center spindle 11 that is rotatable around the spindle 11, and the above-mentioned magnetic sheet 6 A rotary table 10 on which the center core 9 is placed, a magnetic head 8 for recording the above-described still image information, etc. on the magnetic sheet 6 in the magnetic sheet jacket 3, and the magnetic sheet 6 of the magnetic head 8. a head movement operation unit consisting of a guide plate 12 for stabilizing the contact state with the magnetic seal 1-6, a moving arm 15 for automatically and intermittently feeding the magnetic head 8 in the radial direction of the magnetic seal 1-6, etc. 13, and a drive motor 14 for rotationally driving the rotary table 10 and the like.

The magnetic head 8 is attached to the middle part of the moving arm 15 as shown in FIG.
The magnetic sheet jacket is provided so as to face upward in FIG.

The guide plate 12 is inserted into the window 7 of the magnetic sheet jacket 3 to guide the magnetic sheet 6 in the sheet jacket 3 so that it rotates in a stable state. be.

This guide plate 12 is formed by integrally forming a plate-shaped horizontal portion 18A and a base end block 18 formed at its base end, and the magnetic sheet 6 is attached to the upper end surface of the horizontal portion 18A. A sheet guide surface 18a for guiding the sheet substantially parallel to the rotating surface is formed in the shape of a smooth surface.

Further, a guide surface 18b on which the upper surface of the head slider 16 to which the magnetic head 8 is attached slides is formed on the lower surface of the base end block 18, parallel to the sheet guide surface 18a. Furthermore, the window portion 17 for projecting the magnetic throat described above is formed in the center portion of the horizontal portion 18. This window portion 17 is the recording surface 6a of the magnetic sheet 6.
The opening is opened so that the magnetic head 8 can track the entire recording trunk from the innermost track to the outermost track.

The magnetic head 8 is moved within the head protrusion window 17 by the intermittent movement of the movable arm 15 to perform magnetic recording of all the recording tracks described above.

Further, on the guide plate 12, there is a pair of regulating pins 20 for positioning and regulating a regulating plate 19 provided on the jacket holder 4 side, which will be described later, with respect to the magnetic head 8.
a and 20b are erected.

Further, as shown in FIG. 3, the tip 11a of the center spindle 11 provided approximately at the center of the main body 2 is connected to the magnetic sheet 6 when the magnetic sheet jacket 3 is installed in the magnetic recording apparatus 1. It penetrates through the insertion hole 9a of the center core 9 attached to the central portion and projects above the magnetic sheet jacket 3.

Further, as shown in FIG. 3, the rotary table 10 is rotatably mounted around the center spindle 11 via a ball bearing 21. As shown in FIG. 1, this rotary table 10 is rotated by the drive motor 14 via a belt 22. The rotary table 10 has a circle serving as a suction and fixing member for suctioning the metal plate 9C provided on the center core 9 in order to fix the center core 9 of the magnetic sheet 6 to the rotary table 10. An annular permanent magnet 10a is provided. In addition, the above-mentioned RAD slider 16 and the above-mentioned head moving arm 1
A plate spring (not shown) is interposed and twisted between the magnetic head 5 and the magnetic head 5 for the purpose of bringing the magnetic heald 8 into elastic contact with the magnetic sheet 6.

As shown in FIGS. 1 and 2, the jacket holder 4 includes a plate-shaped receiving frame 23 that receives the magnetic sheet jacket 3, and a case cover 24 that covers the entire magnetic sheet jacket 3 from above. It is composed of.

On both sides of the receiving frame 23, there are receiving portions 2 having a substantially U-shaped cross section for receiving both side portions 3a and 3b of the magnetic sheet jacket 3.
3a and 23b, and an opening 23C formed so as not to interfere with the regulation plate 19 provided on the case cover 24.

Further, a retaining groove 2 is provided on one side 23b of the receiving frame 23.
3d, and a stopper part 25 is formed at the tip thereof to temporarily fix the jacket holder 4 to the main body 2 in the operating position. This stopper portion 25 is adapted to engage with a locking piece 26 provided on the main body 2 side.

Further, the case cover 24 has one of bent portions 24a, 241) formed by bending along both side edges of the case cover 24, and is inserted into the engagement groove 23d of the receiving frame 23. An engagement pin 27 that engages with the retention groove 23d is fixed. This engagement pin 27 is provided to prevent the case cover 24 from being opened too much with respect to the receiving frame 23, and due to the action of the engagement pin 2γ and the engagement groove 23d. , receiving frame 23 and case cover 24
are inseparable from.

Note that a plate spring 28 is fixed to the inner surface of the case cover 24 with screws 28a and 28b, but this is done so that the magnetic sheet jacket 1-3 can be easily inserted into the case cover 24 through the jacket insertion opening. This is provided for the purpose of separating the receiving frame 23 by a predetermined interval.

Further, a regulation plate 19 is disposed on the case cover 24 . As shown in FIGS. 1 and 2, this regulation plate 19 includes a rectangular sheet regulation part 19a for regulating the position of the magnetic sheet 6 from the upper surface side, and a plate integrally formed on the upper surface of this regulation part 19a. It is formed from a shaped mounting portion 19b and is disposed at a position on the case cover 24 side facing the guide plate 12. As shown in FIG.
4 fixed and hanging by 0f, 30g, 30h
It is supported movably in the axial direction by book locking pins 30a, 30b, 30C and 30d.

Moreover, between this case cover 24 and the regulation plate 19,
A compression spring 31 is interposed.

One end of the compression splinter 31 is still in contact with the inner wall of the case cover 24, and the other end is housed in a recess 32 provided in the center of the upper surface of the regulating plate 19.

Due to the elastic force of this compression spring 31, the regulating plate 19
are always elastically biased in the direction of the guide plate 12 along each of the locking pins 30a, 30b, 30C, and 30d.

Furthermore, a smooth sheet regulating surface 19C as shown in FIGS. 3 and 4 is formed on the lower end surface of the sheet regulating portion 19a constituting the regulating plate 19. This regulatory aspect 19
G is for regulating the position of the sheet surface 6a of the magnetic sheet 6 with the sheet guide surface 18a of the guide plate 12 mentioned above at a predetermined distance from both the upper and lower sides. This regulation surface 19C
The height of the regulating plate 19 with respect to the guide plate 12 is adjusted by adjusting screws 29a, 29b, and 29C screwed onto the mounting portion 19b, as shown in FIGS. 2 and 3. . That is, each adjustment screw 29a described above
, 29b, 29C are connected to the center spindle 11.
The adjustment screws 29a,
29b.

By screwing 29C forward or backward, the above-mentioned regulation plate 1
9 can be accurately positioned and adjusted with respect to the guide plate 12. In this way, the regulating plate 19 is fixed to the adjusting screws 29a, 29b.

29C is the center spindle 11 and each regulation pin 2
The receiver is taken off at the bottom dead center as shown in FIG. It will be positioned accurately.

In addition, when the magnetic head 8 is brought into sliding contact with the magnetic sheet 6, the magnetic sheet 1-6 is located at a position facing the magnetic head protrusion window 17 near the center of the sheet regulating surface 19C. A semicircular grooved portion 3 is formed so as to form a relief portion.
8 is formed.

Further, the circumferential edge of the sheet regulating surface 19C is chamfered in an arc shape.

As shown in FIG. 2, two through holes 3 are provided between the sheet regulating surface 19C of the regulating plate 19 and one adjustment screw 29a.
Approximately figure 8-shaped detection coil storage section 39 consisting of 9a and 39b
is formed, and detection coils 33a and 33b for detecting the rotational phase of the magnetic sheet 6 are arranged within this storage portion 39. The center core 9 of the magnetic sheet 6 is located at the center of the detection coils 33a and 33b as shown.
The magnetic material 36 embedded in the center core 9 rotates with the center core 9, and detects when it passes through a position facing the coil iron cores 35a and 35b.
The rotational speed and phase of 6 can be detected.

The other end of the support member 34 is fixed to the regulating plate 19 with fixing screws 40a, 40a, and the outputs detected by the detection coils 33a, 33b are connected to a predetermined electronic terminal on the upper surface of the support member 34. Required wiring to lead to the circuit 4
One ends of 1a, 41b, . . . are soldered.

Further, the mounting portion 19b shown in FIG. 2 and FIG. 37 is hanging down. The tip of this protrusion 37 hanging down toward the rotary table 10 is connected to the detection coil 33.
It is formed to have the same height as each tip of the coil iron cores 35a, 35b of (a, 331). The coil iron cores 35a, 35b and the protrusion 37 are arranged to face the center core 9 of the magnetic sheet 6 placed on the rotary table 10, as shown in FIG. As shown in FIG. 3, these coil iron cores 35a, 35b and the protrusions 37 are arranged so that when the jacket holder 4 is closed, the sensor core 9 of the magnetic sheet 6 is connected to the metal plate 9.
After C is attracted to the permanent magnet 10a and fixed to the rotary table 10, it is spaced apart from the center core 9 with a gap of, for example, about 0.4 mm.

Furthermore, before the center core 9 is attracted to the permanent magnet 10a, the respective protrusions 37 and the coil iron cores 35a, 35b press the center core 9 to a position where it can be attracted to the permanent magnet 10a. It serves as a center core pressing member to reliably approach the center core.

In order to attach the magnetic sheet 6 housed in the magnetic sheet 1-jacket 3 to this rotating magnetic sheet device, the magnetic sheet jacket 3 is inserted into the receiving frame 23 of the jacket holder 4, and the jacket holder 4 is This is done by rotating and closing the lid on the main body 2. When the jacket holder 4 is closed, as shown in FIG.
The insertion hole 9a of the center core 9 of the magnetic sheet 6 is fitted with the center spindle 11, and the center core 9 is fixed to the rotary table 10 by suction.

Further, as shown in FIG. 6, the center core 9 of the magnetic sheath 1-6 is provided on the above-mentioned regulating plate 19 when the jacket holder 4 is not completely closed. It is pressed by the protrusion 37 and the coil iron cores 35a and 35b energized by the generated force. Therefore, when the jacket holder 4 is closed, the center core 9 is pressed by the protrusion 37 and the coil iron cores 35a and 35b, and resists the frictional force between the insertion hole 9a and the center spindle 11. It can be reliably fitted to the spindle 11. As shown in FIG. 7, the center core 9 includes the protrusion 37, each coil core 35a,
35b, and the center core 9 is approached to a position where the magnetic force of the permanent magnet 10a provided on the rotary table 10 can overcome the frictional force and reliably attract the center core 9. The center core 9, which has been brought close to the rotary table 10 in this manner, is attracted to the metal plate 9C by the permanent magnet 10a, thereby being fixed to the rotary table 10 as shown in FIG. The magnetic sheet 6 is mounted in a state in which magnetic recording is possible.

Further, the regulating plate 19 includes each of the adjusting screws 29a.

29b and 29C are the center spindle 1, respectively.
1 and each of the above-mentioned regulating pins 20a and 20b, the position is regulated at the bottom dead center. It will be separated from the center core 9. Therefore, the above-mentioned protrusion 37 and each coil iron core 3
5a and 35b' do not interfere with high-speed rotation of the magnetic sheet 6 during recording.

In this embodiment, when the magnetic sheet 6 is attached, the center core 9 of the magnetic sheet 6 is fitted into the center spindle 11 while being supported and suppressed by the projection 37 and the coil iron cores 35a and 35b, and rotates. Since the center core 9 can be approached to the rotating table 10, the center core 9 is reliably fixed to the rotary table 10 by suction, and the frictional force of the fitting between the spindle 11 and the insertion hole 9a causes the center core 9 to be suctioned and fixed to the rotating table 10. will not be hindered or incomplete.

Further, the protrusion 37 and each coil iron core 35a.

35b is connected to the center spindle 1 with respect to the main body 2.
After the center core 9 is fixed in place by attracting the center core 9, the position of the magnetic sheet 6 is accurately regulated in the axial direction of the projection 37, and the projections 37 are separated from the center core 9. and coil iron core 35a,
35b. Moreover, the protrusion 37 and the coil iron core 35a, '351) are connected to the main body 2.
Since the position is regulated by the center spindle 11 and the regulating pins 20a and 20b provided on the side, for example, if an external force is applied to the jacket holder 4 side and distortion occurs in the case cover 24, etc. However, the rotating table 10, each of the protrusions 37, and the coil iron core 35
a, 35b can maintain an accurate opposing state without being affected by distortion of the case cover 24 or the like.

Therefore, even if the case cover 24 etc. is distorted and loses its original manufacturing precision, the protrusions 37 and the coil iron cores 35a, 35b
However, the above rotation of the magnetic sheet 6 is not hindered.

In this embodiment, the pin-shaped projection 37 and the coil iron cores 35a and 35b are used as a suppressing member to press the center core 9, but the suppressing member may have a plate-like shape or a hemispherical shape, for example. It may be a protrusion, etc., and its shape and number can be varied.

Furthermore, although the above embodiments have described a rotating magnetic sheet device equipped with a magnetic recording device, the present invention can also be applied to a rotating magnetic sheet device equipped with a reproducing function or a rotating magnetic sheet device having both magnetic recording and reproducing functions. Needless to say, you can get it.

<Effects of the Invention> As is clear from the description of the above-mentioned embodiments, according to the present invention, the attraction force of the attraction and fixing member provided on the rotary table holds the center core of the magnetic sheet so that the center core and the center spindle fit together. Since the suppressing member brings the center core closer to the position where it can be attracted by the combined friction force, the magnetic sheet can be installed reliably, and signal leakage due to incomplete installation can be prevented. There is no risk of it happening.

Furthermore, since the pressing member is provided so as to be spaced apart from the center core after the magnetic sheet is attached, the pressing member does not prevent the high-speed rotation of the magnetic sheet, and the magnetic sheet is It is possible to maintain smooth magnetic recording and reproduction.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention, FIG. 2 is a partially omitted exploded perspective view showing main parts of a rotating magnetic sheet device,
Figure 3 is a partially omitted vertical cross-sectional view showing the state when the magnetic sheet is attached, Figure 4 is a partially omitted vertical cross-sectional view showing the condition of the regulating plate being installed, and Figure 5 is a partially omitted longitudinal cross-sectional view showing the state of the regulating plate and the magnetic sheet. A schematic plan view showing the positional relationship, FIG. 6 is a partially omitted vertical cross-sectional view showing the state in which the jacket holder is being closed, and FIG. 7 is a schematic plan view showing the jacket holder being closed, and FIG. FIG. 3 is a partially omitted longitudinal cross-sectional view showing a state before being suctioned and fixed to the housing. 2...Main body, 3...Magnetic sheet jacket, 4...
・Jacket holder, 6... To magnetic seam 1, 8...
Magnetic head, 9... Center core, 9a... Insertion hole, 9C... Metal plate, 10... Turntable, 10a...
Permanent magnet, 11... Center spindle, 12...
Guide plate, 19... Regulation plate, 20a, 20b... Regulation pin, 23... Receiving frame, 24... Case cover, 29
a, 29b, 29G...adjustment screw, 30a, 30b
, 30C, 30d--Lock pin, 31... Compression spring, 33a, 33b... Detection coil, 35a, 3
5b...Coil iron core, 37...Protrusion. Patent applicant Sony Corporation representative Patent attorney Kodo Koike 1) Tashi Mura

Claims (2)

[Claims] (1) A rotary table having a center spindle that is fitted and locked to a center core of a magnetic sheet rotatably housed in a magnetic sheet jacket, and having an adsorption and fixing member disposed relative to the core; , a main body including the rotary table and a magnetic head for recording and reproducing data in sliding contact with the magnetic sheet 1-; and a jacket holder for attaching and detaching the seat jacket to and from the rotary table, the jacket is elastically supported by the jacket holder and comes into contact with the center core when the holder is closed, and the core is attracted at least by the suction. The adsorption force of the fixing member is superior to the fitting friction force between the center spindle and the core! A rotating magnetic sheet device characterized in that a center core pressing member is provided that protrudes so as to be able to press up to 100 degrees, and is held in a state separated from the core after being suctioned and fixed by the suctioning and fixing member. . (2) The rotating magnetic sheet device according to claim 1, wherein the center core suppressing member is a coil iron core of a detection coil for detecting the phase of the magnetic sheet.