JP2006065954A - Recording disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize rotation supporting structure of a disk stack housed in a cartridge case, with less number of parts. <P>SOLUTION: Three notch parts 43g are formed at equal interval on an inner peripheral surface of a spacer 43' on a disk stack constituted by laminating a plurality of magnetic disk media 41. Projections 46d corresponding to the notch parts 43g are formed at engaging parts 46a of a rotation supporting member 44. A center plate 47 is fixed to the inside of a cartridge case 2. The rotation supporting member 44 is engaged with the spacer 43' by the engaging part 46a, and generates energizing force in the spacer 43' by elastic deformation of a leaf spring 46b while supported by the center plate 47 at a contact part 45. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording disk cartridge provided with a plurality of flexible recording disk media.

  Conventionally, a flexible magnetic disk medium in which a magnetic layer is formed on both sides of a disk-shaped support made of a flexible material such as a polyester sheet is known. This magnetic disk medium has a merit that access to data is faster than a magnetic tape, but has a demerit that a storage capacity is small due to a small recording area.

In order to solve the disadvantages of such a flexible magnetic disk medium, conventionally, a magnetic disk cartridge in which a plurality of magnetic disk media are stored in one cartridge case has been disclosed (see, for example, Patent Document 1). In this technology, one end of a center core that integrally supports a plurality of magnetic disk media from the center hole side is magnetically attracted by the spindle of the magnetic disk drive so that each magnetic disk medium is rotated simultaneously. A plurality of magnetic heads are separately accessed to a plurality of magnetic disk media rotating at the same time, thereby improving the data transfer speed.
Japanese Patent Laid-Open No. 2004-22011

  However, since the magnetic disk cartridge disclosed in Patent Document 1 has a structure in which one end of the center core is only magnetically attracted to the spindle of the magnetic disk drive, the length in the axial direction can be increased by increasing the number of magnetic disk media. There is a problem that the rotational movement becomes unstable as the value of becomes large.

  Accordingly, an object of the present invention is to provide a disk cartridge capable of stabilizing the rotation of the recording disk medium even when the number of recording disk media is increased and realizing the support structure with a small number of parts. To do.

  In order to solve the above problems, a recording disk cartridge of the present invention includes a plurality of recording disk media, a rotating body that holds these recording disk media, and a cartridge case that rotatably accommodates the recording disk medium and the rotating body. A rotation support member for urging the rotation body toward the cartridge case is provided between the cartridge case and the rotation body. The rotation support member includes a contact portion that makes point contact with the cartridge case and the other end of the rotation body. And a spring portion that urges the contact portion and the engagement portion away from each other.

  With such a configuration, the rotating body holding the recording disk medium is pressed against the opening side of the cartridge case by the urging force of the rotation support member. There is nothing. Further, since the contact portion of the rotation support member makes point contact with the cartridge case during rotation, the frictional force generated at the contact portion along with the rotation can be reduced, and the rotation operation of the recording disk and the rotating body is stabilized. be able to.

In the recording disk cartridge described above, the contact portion of the rotation support member can be formed as a spherical protrusion, and the engagement portion that engages with the rotating body can be formed in a circular shape centering on the contact portion.
In this case, an equal urging force can be generated on the rotating body by the rotation support member, and the recording disk and the rotating body can be stably rotated.

For example, the rotating body can be configured by arranging a connecting member on a center core fixed to the center of each recording disk medium, and alternately stacking the center core and the connecting member. In this case, it is desirable that the engaging portion of the rotation support member is engaged with a connecting member located on the other end side of the rotating body to be connected to the rotating body.
In the engagement between the engaging portion and the connecting member, a plurality of stepped notches are formed, for example, at equal intervals in the circumferential direction of the inner peripheral surface of the through hole formed in the connecting member, and the outer peripheral surface of the engaging portion A protrusion corresponding to the notch is formed on the rotation support member, and the rotation support member can be connected to the rotating body by engagement between the protrusion and the notch.
Contrary to the above, a plurality of protruding portions and stepped portions are formed, for example, at equal intervals in the circumferential direction of the inner peripheral surface of the through hole formed in the connecting member, and the protruding portion is formed on the outer peripheral surface of the engaging portion. It is also possible to form a notch corresponding to, and to connect the rotation support member to the rotating body by engaging the protrusion and the notch.

The contact portion of the rotation support member is preferably formed using an abrasion resistant material.
Further, the contact portion and the spring portion performing the spring action can be made of different materials. Since the contact portion and the spring portion are made of different materials, a stable urging force can be generated on the rotating body for a long time to support the rotating body, and a more reliable recording disk cartridge can be obtained. Can do.

  According to the present invention, even if the number of recording disk media is increased, the rotating body can rotate stably, and the rotation support member that generates a biasing force on the rotating body includes the contact portion, the engaging portion, and the like. Since the spring portion is integrated, the structure for supporting the rotating body can be configured very simply, and the rotating body can be stably rotated and supported with a small number of parts. As a result, the number of parts of the entire recording disk cartridge can be reduced, and the productivity and assembly can be improved, and the manufacturing cost of the recording disk cartridge can be reduced.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In this embodiment, a case where a magnetic disk medium is employed as an example of a recording disk medium will be described.
FIG. 1 is an exploded perspective view of a magnetic disk cartridge according to an embodiment. FIG. 2 is an external perspective view of the magnetic disk cartridge according to the embodiment. FIG. 3 is a perspective view showing the inner surface of the upper plate, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2B of the magnetic disk cartridge loaded in the magnetic disk drive. FIG. 5 is a partially enlarged view of FIG. 4, and FIG. 6 is an exploded perspective view showing a laminated structure of magnetic disk media. In the following description, the upper and lower directions are based on the typical usage state of the magnetic disk cartridge, and the direction perpendicular to the surface of the magnetic disk medium is referred to as the upper and lower directions for convenience.

  As shown in FIG. 1, a magnetic disk cartridge 1 which is an example of a recording disk cartridge includes a lower plate 10 constituting a lower wall, a plurality of, for example, four inner plates 20, and an upper plate 30 constituting an upper wall. Are sequentially laminated, and these are fastened and fixed by four screws 91 to constitute the cartridge case 2 (see FIG. 2A). Magnetic disk media 41 are arranged between the lower plate 10 and the inner plate 20, between the inner plates 20, and between the inner plate 20 and the upper plate 30. The magnetic disk medium 41 has a disk shape having an opening 41a in the center, and a metal center core 42 is attached to the edge of the opening 41a. The center cores 42 are engaged with each other by spacers 43 and 43 ′ (connecting members), and five magnetic disk media 41 (the stacked and integrated magnetic disk media 41 is referred to as a disk stack 40) are integrated. It is designed to rotate.

  Each inner plate 20 is formed with ribs 22 in contact with the upper and lower plates on the outer peripheral edge of a flat main plate 21. A part of the inner plate 20 on the right front side in FIG. 1 is formed with a notch 23 so that the magnetic head 63 (see FIG. 4) can easily move onto the magnetic disk medium 41. The above-described rib 22 is not formed in the notch 23. Therefore, when the inner plate 20 is stacked, an opening 3 is formed on the side surface of the cartridge case 2 as shown in FIG.

  The opening 3 is opened and closed by a shutter 4 that rotates coaxially with the disk stack 40. As shown in FIG. 1, the shutter 4 is configured by combining a lower rotor 51 and an upper rotor 52.

Next, each member will be described in more detail.
The lower plate 10 is configured such that ribs 12 that contact the lower surface side of the ribs 22 of the inner plate 20 and side walls 13 are formed on the outer peripheral edge of the substantially square main plate 11. The side wall 13 is erected in a predetermined range from one corner (the front side corner in FIG. 1) of the main plate 11, for example, about one third of one side, and the inner plate 20 is stacked approximately. It is formed at a height.

A fan-shaped portion from one side 11a (one side on the right front side in FIG. 1) connected to the side wall 13 of the main plate 11 toward the center of the main plate 11 forms a recessed portion 14a that is lowered by one step, and a rib 12 on the outer peripheral edge. Is not formed and is an opening 14. This makes it easy for the magnetic head 63 to enter the cartridge case 2.
Ribs 12 are formed so that the gear 51f of the lower rotor 51, which will be described later, can be exposed in a range of approximately one third of the other side 11b (one side on the left front side in FIG. 1) that continues to the side wall 13 of the main plate 11. Without opening 15. Further, a groove 13 a is formed on the outer side of the side wall 13 on the other side 11 b side so as to be continuous with the opening 15 and along the outer periphery of the lower plate 10. The groove 13a serves as a passage through which the shutter open gear 67 (see FIG. 2A) of the magnetic disk drive enters in the direction indicated by the arrow Ar in FIG. ing.

The rib 12 described above is formed so as to protrude upward over the entire outer periphery of the main plate 11 except for the side wall 13 and the openings 14 and 15.
In the center of the main plate 11, a circular opening 16 is formed for exposing the center core 42 provided in the lowermost magnetic disk medium 41. On the upper edge of the opening 16, a rib 17 is formed over the entire circumference so that a central opening 51 c formed at the center of the lower rotor 51 is fitted. The rib 17 supports the lower rotor 51 so as to be rotatable.
A circular lower rotor support groove 18 is formed at a position corresponding to the outer peripheral edge of the lower rotor 51 on the upper surface (inner surface) of the main plate 11. The lower rotor support groove 18 engages with a rib 51 d (see FIG. 4) formed downward on the outer peripheral edge of the lower rotor 51, so that the lower rotor 51 can be rotated coaxially with the magnetic disk medium 41. To support.
Further, screw holes 19 are formed in the four corners of the main plate 11 so as to penetrate vertically and have female threads.

The main plate 21 of the inner plate 20 has an approximately square shape, and a portion corresponding to one corner of the four corners of the square has an arc shape (arc portion 24) that is slightly larger than the magnetic disk medium 41. ing. And the above-mentioned notch 23 is fan-shaped in the one side (right front side in FIG. 1) which continues to the circular arc part 24. The aforementioned ribs 22 are formed so as to protrude up and down over the entire outer periphery of the main plate 21 excluding the arc portion 24 and the notch 23. At the center of the main plate 21, a central opening 21 c is formed to expose the upper center core 42 and enable connection with the lower center core 42.
In addition, holes 29 are formed in the three corners of the main plate 21 so as to penetrate the screw plate 91a of the screw 91 through the top and bottom.

The upper plate 30 is formed in a shape that is approximately symmetrical with the lower plate 10. As shown in FIG. 3, the upper plate 30 includes an approximately square main plate 31, a recess 34 corresponding to the recess 14 a, a rib 37 corresponding to the rib 17, and an upper rotor corresponding to the lower rotor support groove 18. A support groove 38 is formed. Note that no opening is formed in the center of the main plate 31 and no side wall corresponding to the side wall 13 is formed.
A rib 32 protruding downward is formed on the outer peripheral edge of the main plate 31 over the entire circumference except for the recess 34.
Further, holes 39 through which the screw shaft portions 91 a of the screws 91 pass are formed in the four corner portions of the main plate 31.

In the lower rotor 51, a central opening 51c, a notch 51e, a rib 51d, and a gear 51f are formed in a ring-shaped lower rotor plate 51a that is approximately the same as the magnetic disk medium 41, and a shutter plate 51b is provided on the outer peripheral edge of the lower rotor plate 51a. It is constructed upright. The central opening 51c is formed in a circular shape that is fitted on the rib 17, and the notch 51e is formed in a sector shape corresponding to the recess 14a. Further, the rib 51d is provided on the outer peripheral edge of the lower surface of the lower rotor plate 51a so as to correspond to the lower rotor support groove 18 downward.
The shutter plate 51b is a shielding member that blocks the opening 3 (see FIG. 2A) and the disk stack 40, and is erected along the outer peripheral edge of the lower rotor plate 51a adjacent to the notch 51e. . The gear 51f is a portion engaged to open and close the shutter 4 (see FIG. 2A) from the outside of the magnetic disk cartridge 1, and is adjacent to the shutter plate 51b on the outer periphery of the lower rotor plate 51a. And formed over a predetermined range.

The upper rotor 52 is configured to be approximately symmetrical with the lower rotor 51. That is, the upper rotor plate 52a is the same as the lower rotor plate 51a. The upper rotor plate 52a includes a central opening 52c that fits around the rib 37 of the upper plate 30, a notch 52e corresponding to the recess 34, and an upper rotor. Ribs 52d corresponding to the support grooves 38 are formed. A shutter groove 52 b is formed in a portion adjacent to the notch 52 e on the outer peripheral edge of the upper rotor plate 52 a so as to correspond to the shutter plate 51 b of the lower rotor 51. By engaging the shutter groove 52b and the upper edge of the shutter plate 51b, the lower rotor 51 and the upper rotor 52 rotate together.
The upper rotor 52 is rotatably supported by the upper plate 30 with the central opening 52c fitted on the rib 37 of the upper plate 30 and the rib 52d engaging the upper rotor support groove 38. The upper rotor 52 is prevented from dropping from the upper plate 30 by the locking member 53. The locking member 53 has a cylindrical portion 53a inserted into the rib 37 (see FIG. 3), and a flange 53b formed at one end of the cylindrical portion 53a. The cylindrical portion 53a opens from the lower side of the upper rotor 52 to the central opening. The portion 52c is inserted and fixed to the rib 37 by ultrasonic welding or an adhesive.

As shown in the enlarged sectional view of FIG. 5, the upper surface of the lower rotor 51, both upper and lower surfaces of the inner plate 20, and the lower surface of the upper rotor 52 are opposed to the magnetic disk medium 41 on the surface facing the magnetic disk medium 41. A liner 49 is affixed over the portion.
The liner 49 is made of non-woven fabric such as polyester fiber or rayon / polyester blend fiber.

Next, a laminated structure of the lower plate 10, the inner plate 20, and the upper plate 30 will be described.
As shown in FIG. 5, the rib 12 of the lower plate 10 is formed so that the inner side is one step higher than the outer side to form a male step 12 a. The rib 22 of the inner plate 20 forms a female step 22a protruding downward at the outermost periphery, and the outer periphery of the male step 12a and the inner periphery of the female step 22a can be fitted. ing. In addition, when the lower plate 10, the inner plate 20, and the upper plate 30 are fastened with screws 91 (see FIG. 1), the upper surface of the male step 12a and the corresponding portion of the lower surface of the inner plate 20 are in close contact with each other. It has become. In this way, the rib 12 of the lower plate 10 and the rib 22 of the inner plate 20 are so-called stamped and fitted, so that dust can be prevented from entering the cartridge case 2 from the outside.
Similarly, the inner plates 20 and the inner plate 20 and the upper plate 30 are also laminated by stamping. That is, the upper side of the inner plate 20 is formed with a male step portion 22b whose inner side is one step higher, and the rib 32 of the upper plate 30 is formed with a female step portion 32a whose outermost periphery protrudes downwardly by one step. Yes. Then, the male step 22b of the inner plate 20 and the female step 22a of the inner plate 20 adjacent on the upper plate 20 are inlayed, and the male step 22b of the inner plate 20 and the female of the upper plate 30 are female. The mold step 32a is laminated by stamp fitting. In this way, the ribs 12, 22, 32 are stamped together to prevent dust from entering the cartridge case 2 from the outside. Further, the side wall of the cartridge case 2 is formed simultaneously with the lamination of the lower plate 10, the inner plate 20, and the upper plate 30.

  The female step 22 a and the male step 22 b both protrude from the main plate 21 higher than the thickness of the liner 49. Therefore, even if the liner 49 is attached to the inner plate 20 to form an assembly and the assembly is placed on a workbench or the like, the liner 49 does not contact the workbench and therefore the liner 49 is contaminated with dust or the like. There is nothing.

  Such a configuration of the cartridge case 2 by stacking the inner plates 20 makes it easy to change the number of magnetic disk media 41. Although it is necessary to change the height of the side wall 13 and the height of the shutter plate 51b, the number of accommodating portions of the magnetic disk media 41 formed in the cartridge case 2 is mainly changed only by changing the number of the inner plates 20. Because it can.

Next, the magnetic disk medium 41 and its laminated structure will be described.
The magnetic disk medium 41 is obtained by applying a magnetic paint on both sides of a resin sheet such as polyester.

  As shown in FIG. 6, the center core 42 is formed by drawing a metal plate with a press into a substantially hat shape. That is, it is mainly composed of a circular bottom plate 42a, a low cylindrical side wall 42b rising from the outer peripheral edge of the bottom plate 42a, and a flange 42c extending from the upper end of the side wall 42b in the outer diameter direction. A center hole 42d is formed at the center of the bottom plate 42a, and six small holes 42e are formed at intervals of 60 ° around the center hole 42d at the periphery.

The spacers 43 are interposed between the adjacent center cores 42 to maintain the distance between the center cores 42 and lock the rotation between the adjacent center cores 42 so that the stacked magnetic disk media 41 are integrated. And function to rotate. The spacer 43 includes a main body 43a formed of resin in a ring shape and a metal pin 43b press-fitted into the main body 43a. The main body 43a has a through-hole h formed of a small-diameter hole 43c into which the pin 43b is press-fitted and a large-diameter hole 43d that is coaxial with the small-diameter hole 43c and has a slightly large diameter. Are formed at positions corresponding to. The six through holes h are adjacent to each other upside down. That is, the through hole h2 adjacent to the through hole h1 where the large diameter hole portion 43d is located on the upper side is arranged so that the large diameter hole portion 43d is located on the lower side.
A pin 43b is press-fitted into each small diameter hole portion 43c from above and below, one end of the pin 43b is located at the boundary between the large diameter hole portion 43d and the small diameter hole portion 43c, and the other end to the outside of the small diameter hole portion 43c. It protrudes. The large-diameter hole 43d functions as a relief of the tip of the pin 43b of the adjacent spacer 43.

Such a spacer 43 is interposed between the adjacent center cores 42 as shown in FIG. The pin 43b protruding to the lower side of the spacer 43 enters the small hole 42e of the lower center core 42 of the spacer 43 and locks relative rotation with the lower center core 42. When the spacer 43 is further below the lower center core 42, the spacer 43 is prevented from being lifted with respect to the center core 42 by entering the large-diameter hole 43 d in the lower spacer 43. The pin 43b protruding above the spacer 43 enters the small hole 42e of the upper center core 42 of the spacer 43 and locks the relative rotation with the upper center core 42. When the spacer 43 is further above the upper center core 42, the tip of the pin 43 b enters the large-diameter hole 43 d in the upper spacer 43.
Since the uppermost center core 42 has no center core to be rotationally locked on the upper side, a spacer 43 ′ having a thin end face with a pin 43b protruding only on the lower side is disposed thereon.

As described above, in the disk stack 40, the spacers 43 and 43 ′ for locking the center cores 42 are arranged on each center core 42 fixed to the magnetic disk medium 41, and the center core 42 and the spacers 43 and 43 ′ are alternately arranged. The center core 42 and the spacers 43 and 43 ′ are integrally stored in the cartridge case 2 so as to be rotatable in the rotation direction.
The center core 42 and the spacers 43 and 43 'constitute a rotating body that holds the magnetic disk medium 41. At this time, the center core 42 exposed to the opening 16 of the cartridge case 2 is located on one end side of the rotating body, and the other end side. In this case, the end face spacer 43 'is positioned.
A rotation support member 44 is provided between the spacer 43 ′ and the cartridge case 2, and the disk stack 40 is urged toward the opening 16 side of the cartridge case 2 by the rotation support member 44 and is rotatably supported.

Next, the rotation support structure of the disk stack 40 according to the present invention will be described with reference to the drawings.
FIG. 7 is an exploded perspective view showing the structure in the vicinity of the rotation support member.
The spacer 43 ′ is a spacer located on the end face of the disk stack 40 as described above, and is engaged with the center core 42 (see FIG. 6) below the three pins 43 b so as to be rotatable integrally with the disk stack 40. It has become.
The rotation support member 44 is configured by attaching a spherical contact portion 45 to a leaf spring member 46 bulged from a single plate.
The center plate 47 is a sliding member that is affixed to the center of the inner surface of the upper plate 30 that constitutes the cartridge case 2, that is, the flat portion inside the rib 37. For example, it can be composed of a material excellent in slipperiness and wear resistance such as polyoxymethylene resin and ultrahigh molecular weight polyethylene.

The spacer 43 ′ is a ring-shaped member having a through-hole formed at the center, and three notches 43g are formed at equal intervals in the circumferential direction of the inner peripheral surface thereof. The notch 43g has a semicircular shape and is formed from the upper end surface of the spacer 43 ′ downward to a certain depth. Note that it is desirable to shift the positions of the notch 43g and the pin 43b in the circumferential direction as illustrated.
The rotation support member 44 is configured by fixing a contact portion 45 to a support portion 46 c at the center of the leaf spring member 46. The plate spring member 46 is formed by bulging a plate of spring material, and a circular engagement portion 46a corresponding to the through hole of the spacer 43 ′, and a plate spring bulged from the engagement portion 46a. It consists of a part 46b and a support part 46c in which the center of the leaf spring part 46b is further bulged.
Three protrusions 46d corresponding to the notches 43g formed on the inner peripheral surface of the spacer 43 ′ are formed on the outer peripheral surface of the engaging portion 46a.
The leaf spring portion 46b is connected to the engaging portion 46a by three stays 46e, is connected to the support portion 46c by three stays 46f, and the stay 46e and the stay 46f are displaced in the circumferential direction. Therefore, when a force is applied from the contact portion 45, the portion between the stay 46e and the stay 46f bends, and the contact portion 45 can be elastically displaced. The center of the support portion 46c, that is, the contact portion 45, and the center of the engaging portion 46a are the same. Therefore, the force from the contact portion 45 can be equally received by the three protrusions 46d. As a result, the contact portion 45 is displaced only in the axial direction, and the force from the contact portion 45 is evenly distributed. I can tell you.
The contact portion 45 and the support portion 46c can be adhered using, for example, an adhesive. In addition, it can be fixed using a fixing means such as adhesion or press fitting.

  The rotation support member 44 formed in this manner has the protrusion 46d of the engaging portion 46a engaged with the notch 43g of the spacer 43 ′ and is mounted on the spacer 43 ′. 40 can rotate integrally with the disk stack 40, and an urging force can be generated in the disk stack 40 at the stepped portion of the notch 43g in the axial direction.

As shown in FIG. 4, the magnetic disk drive that records and reproduces data with respect to the magnetic disk cartridge 1 rotates the disk stack 40 by the spindle 65. The spindle 65 adsorbs the lowermost center core 42 by magnetic force and enters the center hole 42 d of the center core 42 to align the axis with the disk stack 40. At this time, since the spindle 65 slightly lifts the center core 42 against the urging force of the rotation support member 44, each magnetic disk medium 41 includes the lower rotor 51, the inner plate 20, and the like as shown in FIGS. It is located at the center of the space formed between the upper and lower inner plates 20 or between each of the inner plate 20 and the upper rotor 52.
A magnetic head 63 of the magnetic disk drive is provided at the tip of the swing arm 62. The magnetic head 63 is disposed on both surfaces of each magnetic disk medium 41.

  When the disk stack 40 is rotated by the drive of the magnetic disk drive, the rotation support member 44 is supported by the center plate 47 fixed to the cartridge case 2 by the contact portion 45, so that the friction force during rotation is suppressed and smooth rotation is achieved. You can get action. Further, since the frictional force at the time of rotation has the effect of sliding the contact part 45 around the center of rotation, even if the contact part 45 is located outside the center of rotation, it slides around the center of rotation along with the rotation. Therefore, the disk stack 40 performs a stable rotation operation. At this time, since the contact portion 45 has a spherical shape, the sliding is smoothly performed, and stable rotation can be performed in a short time.

As shown in FIG. 2A, the magnetic disk cartridge 1 as described above is moved to the inside by closing the opening 3 by rotating the shutter 4 counterclockwise in the figure when not in use. Intrusion of dust can be prevented. In use, as shown in FIG. 2B, when the magnetic disk drive is loaded, the shutter open gear 67 of the magnetic disk drive is guided by being fitted in the groove 13a and meshed with the gear 51f. Turn clockwise in the figure.
Then, as the spindle 65 rotates, the disk stack 40 rotates. Thereafter, the swing arm 62 is rotated by being driven by the actuator 61, and the magnetic head 63 is moved onto the magnetic disk medium 41.

When data is recorded on the magnetic disk medium 41 by the magnetic head 63, data is recorded on the magnetic disk medium 41 by sending a signal to the magnetic head 63 by a control circuit (not shown), and the data is recorded from the magnetic disk medium 41. In reproduction, the magnetic head 63 detects a magnetic field change on the magnetic disk medium 41 and outputs a signal.
At this time, the dust on the magnetic disk medium 41 is removed by the liner 49 appropriately touching the magnetic disk medium 41.
After the magnetic disk cartridge 1 is used, after the magnetic head 63 is retracted from the cartridge case 2, the magnetic disk cartridge 1 is ejected, whereby the gear 51 f is driven by the shutter open gear 67 and the shutter 4 closes the opening 3. .
When the disk stack 40 is removed from the magnetic disk drive, the disk stack 40 is urged toward the cartridge case 2 by the urging force of the rotation support member 44, so that the disk stack 40 does not rattle within the cartridge case 2.

Since the magnetic disk cartridge 1 has the plurality of magnetic disk media 41 as described above, data can be transferred at high speed by simultaneously accessing data with the plurality of magnetic heads 63.
In addition, since the cartridge case 2 is configured by stacking the inner plates 20, it is easy to change specifications so that the number of magnetic disk media 41 is different. When the magnetic disk cartridge 1 is assembled, the magnetic disk medium 41 can be mounted and handled on the inner plate 20 or the lower rotor 51 assembled to the lower plate 10. Can be made more stable.
Since the inner plate 20 is laminated and fixed on the lower plate 10 or the inner plate 20, the parallelism with the magnetic disk medium 41 can be increased, and the rotation of the magnetic disk medium 41 can be stabilized. In addition, the magnetic disk medium 41 can be rotated at a high speed, and hence the data transfer speed can be increased.
In particular, even if the number of magnetic disk media 41 is greatly increased, the support structure described above enables stable rotation, so that a large-capacity magnetic disk cartridge 1 can be obtained without impairing stability during rotation. be able to.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented. For example, in the embodiment, the magnetic disk medium 41 is applied as the recording disk medium, but the present invention can be similarly applied to an optical disk medium that records data by light.
Further, as a support structure for the disk stack 40, for example, as shown in FIG. 8, a connecting shaft 48 may be further provided in the center of the center core 42 to reduce the center deflection between the center cores 42 stacked at the time of rotation. . For example, the connecting shaft 48 is formed with a flange 48 a on the upper end surface as shown in the figure, and the outer peripheral surface of the flange 48 a has the same shape as the engaging portion 46 a of the rotation support member 44, thereby providing a spacer similar to the rotation support member 44. 43 'can be engaged.
Also, as the leaf spring member, for example, as shown in FIG. 9, the leaf spring portion 49b between the support portion 49c to which the contact portion 45 is fixed and the engagement portion 49a is made a simple configuration composed of only a spring. You can also.
Further, with respect to the engagement between the leaf spring member and the spacer, as shown in FIG. 10, for example, three semicircular shapes are formed at equal intervals on the outer peripheral surface of the engagement portion 46a of the leaf spring member 46 ', contrary to the embodiment. A notch 46g is formed, a protrusion 43e corresponding to the notch 46g is formed on the inner peripheral surface of the spacer 43 '', and a step 43f that receives the engaging part 46a is formed below the protrusion 43e. The rotation support member 44 can be connected to the spacer 43 ″ by engaging the notch 46g with the protrusion 43e.
Further, instead of the leaf spring members 46 and 49, for example, a conical compression coil spring 50 as shown in FIG. 11 may be used. In this case, a stepped portion 43f is formed on the inner peripheral surface of the spacer 43 ″ so as to receive the conical compression coil spring 50. The conical compression coil spring 50 is formed with a protrusion or notch for engagement as described above. Therefore, for example, the large-diameter portion of the conical compression coil spring 50 can be formed large and can be engaged with the stepped portion 43f of the spacer 43 ″ by elastic force due to elastic deformation.

1 is an exploded perspective view of a magnetic disk cartridge according to an embodiment. FIG. 2A is a perspective view of an external appearance of a magnetic disk cartridge according to an embodiment, and FIG. 3B shows a state in which the shutter is closed, and FIG. It is a perspective view which shows the inner surface of an upper plate. FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2A of the magnetic disk cartridge loaded in the magnetic disk drive. It is the elements on larger scale of FIG. It is a disassembled perspective view which shows the laminated structure of a magnetic disc medium. It is a disassembled perspective view which shows the structure of the rotation support member vicinity. It is sectional drawing which shows the support structure which provided the support shaft. It is a figure which shows the leaf | plate spring member of another shape. It is a disassembled perspective view which shows the structure of the rotation support member vicinity at the time of using another method of engagement. It is a disassembled perspective view which shows the structure of the rotation support member vicinity at the time of using a conical compression coil spring instead of a leaf | plate spring member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Magnetic disk cartridge 2 Cartridge case 3 Opening part 4 Shutter 10 Lower plate 20 Inner plate 23 Notch 30 Upper plate 34 Opening 40 Disk stack 41 Magnetic disk medium 42 Center core 43 Spacer 43f Step part 44 Rotation support member 45 Contact part 46 Leaf spring member 47 Center plate 48 Connecting shaft 49 Liner 50 Bamboo spring 51 Lower rotor 52 Upper rotor 61 Actuator 62 Swing arm 63 Magnetic head 65 Spindle

Claims (7)

Multiple flexible recording disc media,
A rotating body for holding the recording disk medium to rotate these recording disk media integrally;
A recording disk cartridge comprising a cartridge case that rotatably accommodates the recording disk medium and the rotating body and has an opening for exposing one end of the rotating body to the outside,
A rotation support member is provided between the cartridge case and the other end of the rotating body to urge the rotating body toward the opening,
The rotation support member includes a contact portion that makes point contact with the cartridge case;
An engaging portion that engages with the other end of the rotating body;
A recording disk cartridge comprising a spring portion for urging the contact portion and the engaging portion in a direction away from each other. The recording disk cartridge according to claim 1,
The contact portion is a spherical protrusion,
The recording disk cartridge according to claim 1, wherein the engaging portion is formed in a circular shape centering on the contact portion. The recording disk cartridge according to claim 1 or 2,
The rotating body includes a center core fixed to the center of each recording disk medium, and a connecting member is arranged on each center core, and the center core and the connecting member are alternately stacked so as to be integrally rotatable in the rotation direction. And
The recording disk cartridge, wherein the engaging portion of the rotation support member is engaged with a connecting member located on the other end side of the rotating body. The recording disk cartridge according to claim 3,
A through hole is formed in the connecting member, a notched portion with a step is formed in the circumferential direction of the inner peripheral surface of the through hole, and a protrusion corresponding to the notched portion is formed on the outer peripheral surface of the engaging portion. The recording disk cartridge is characterized in that the engaging portion is engaged with the connecting member by the engagement between the protrusion and the cutout portion. The recording disk cartridge according to claim 3,
A through hole is formed in the connecting member, a stepped portion and a protruding portion are formed in the circumferential direction of the inner peripheral surface of the through hole, and a notch corresponding to the protruding portion is formed on the outer peripheral surface of the engaging portion. The recording disk cartridge is characterized in that the engaging portion is engaged with the connecting member by the engagement between the protruding portion and the notched portion. A recording disk cartridge according to any one of claims 1 to 5,
The recording disk cartridge, wherein the contact portion is made of a wear-resistant material. The recording disk cartridge according to claim 6,
The recording disk cartridge, wherein the contact portion is made of a material different from that of the spring portion, and is fixed to a support portion formed integrally with the spring portion.

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