JPH11176056A - Recording and reproducing device of recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a disk cartridge from colliding against a magnetic head when the disk cartridge is inserted into a disk holder and also to contrive the space saving. SOLUTION: The collision preventing mechanism 81 of the disk cartridge is constituted of a protector 82 extendedly provided in the insetting direction of the disk cartridge, a protector arm 83 attached to the rear end part of the protector 82, and a torsion spring 84 for pressing the protector 82 to be in the erecting state. The protector 82 before the disk cartridge is inserted is held so that sliding contact part 89 for the disk cartridge is in the erecting state by the spring force of the torsion spring 84. By this arrangement, the disk cartridge 96 inserted into the disk holder 12 is slid in contact with the sliding contact part 89 for the disk cartridge of the protector 82, and the height position of insertion is controlled. Thus, the end part of the disk cartridge 96 on the inserting side is prevented from colliding against the lower side magnetic head 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for a recording medium, and more particularly to a recording medium cartridge in which an insertion end of a recording medium cartridge contacts a lower magnetic head when the recording medium cartridge is inserted into a disk holder. The present invention relates to a recording medium recording / reproducing apparatus configured to prevent such a situation.

[0002]

2. Description of the Related Art For example, in a magnetic disk device for performing magnetic recording and reproduction by mounting a disk cartridge containing a flexible magnetic disk as a recording medium, the device has been made thinner and smaller. Accompanying this, the intervals between the members have become smaller, and more precise processing has been required.

However, as the thickness of the magnetic disk drive is reduced, the gap between the height of the disk cartridge inserted into the holder and the height of the lower magnetic head of the head carriage is reduced. Therefore, when the disk cartridge is warped so as to protrude downward, the front end of the disk cartridge inserted into the holder may abut on the lower magnetic head.

In order to prevent the front end of the disk cartridge from contacting the lower magnetic head when the disk cartridge is inserted into the holder, for example, the applicant of the present invention disclosed in Japanese Patent Publication No. 6-103573. A configuration having an abutment prevention mechanism is proposed. The structure of this disk cartridge contact prevention mechanism is such that when the disk cartridge is inserted into the holder and the holder is mounted on the upper surface of the frame, the end of the disk cartridge rides on the protrusion on the upper surface of the frame so that the end of the disk cartridge is positioned on the lower magnetic head A contact preventing member that regulates the insertion position of the disc cartridge so as not to contact the disk cartridge, and a rotating lever having one end connected to the contact preventing member. The other end of the rotating lever is connected to a slider having an eject button.

Therefore, when the disk cartridge is inserted into the holder, the holder is lowered from the insertion position of the disk cartridge to the mounting position, and furthermore, the slider slides and the rotating lever is rotated.
Therefore, the rotating lever rotates as the slider slides to displace the contact preventing member to the contact preventing position or the retracted position separated from the mounted disk cartridge.

In the magnetic disk drive, the storage capacity is increased by increasing the disk rotation speed, and the storage capacity of the magnetic disk is being increased. In this type of large-capacity magnetic disk device, the magnetic head is slightly lifted so that the magnetic head does not damage the surface of the magnetic disk because the magnetic head is given a levitation force by an air flow generated as the magnetic disk rotates at a high speed. Magnetic recording and reproduction can be performed in this state.

[0007]

However, in the above magnetic disk drive, the rotation lever is rotated by sliding of the slider to move the contact preventing member to the contact preventing position or the retracted position separated from the disk cartridge. Since a disk cartridge contact prevention mechanism to displace is required,
That required a large installation space. However, as the storage capacity of the magnetic disk increases, the size of the circuit board increases, and the space for installing the disk cartridge contact prevention mechanism must be reduced.

In the above conventional magnetic disk drive,
Since the sliding operation of the slider is transmitted to the contact prevention member via the rotation lever, the contact prevention member and the rotation lever must be disposed on the upper surface of the frame between the slider and the head carriage. Not only is the shape of the contact prevention member and the range of the rotation operation limited by the rotation lever, but also the number of parts increases and the assembling work is troublesome, and the work efficiency of the assembling process is improved. There is a problem that can not be.

Accordingly, an object of the present invention is to provide a recording medium recording / reproducing apparatus which solves the above problem.

[0010]

In order to solve the above problems, the present invention has the following features. According to the present invention, when a recording medium cartridge is inserted into a holder into which a recording medium cartridge is inserted, a contact portion that regulates an insertion position of the recording medium cartridge so that an end of the recording medium cartridge does not contact a head. In a recording medium recording / reproducing apparatus having a prevention member, the contact prevention member slides into contact with the recording medium cartridge immediately before an insertion-side end of the recording medium cartridge inserted into the holder passes through the head. After the recording medium cartridge restricting portion that regulates the insertion height of the recording medium cartridge and the insertion side end of the recording medium cartridge inserted into the holder have passed through the head, the recording medium slides into contact with the recording medium cartridge and the recording is performed. And a restriction release section for displacing the medium cartridge restriction section to the restriction release position. That.

Therefore, according to the present invention, after the insertion-side end of the recording medium cartridge in which the contact prevention member is inserted into the holder passes through the magnetic head, the recording medium cartridge slides into contact with the recording medium cartridge and the recording medium cartridge restricting section is moved. Since the recording medium cartridge has a restriction releasing portion for displacing the recording medium cartridge, the insertion side end of the recording medium cartridge can be prevented from colliding with the magnetic head when the recording medium cartridge is inserted. Since it is unnecessary, the installation space can be reduced, and the capacity of the recording medium can be increased.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a recording medium recording / reproducing apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a magnetic disk drive 11 as one embodiment of a recording medium recording / reproducing apparatus according to the present invention. FIG. 2 is an exploded perspective view showing a schematic configuration of the magnetic disk drive 11.

As shown in FIGS. 1 and 2, a magnetic disk drive 11 includes a disk holder 12 into which a disk cartridge (not shown) containing a flexible magnetic disk as a recording medium is inserted, A slider 13 that slides in the direction to move the disk holder 12 up and down is mounted on a frame 14. The slider 13 is provided on the frame 14 so as to be slidable in the directions A and B.
2 is lowered from the cartridge insertion / ejection position to the cartridge mounting position.

On a plane 14a of the frame 14, a turntable 15 driven by a motor for rotating a disk is provided.
Head carriage 18 supporting magnetic heads 16 and 17
Are provided. A circuit board (not shown) having a control circuit is attached to the lower surface of the frame 14. The head carriage 18 has a carriage body 19 that supports the lower magnetic head 16 on the top surface of the tip and a carriage body 19 that supports the upper magnetic head 17 on the bottom surface of the tip.
And a head arm 20 rotatably mounted on the head arm 20.

The head carriage 18 is provided movably guided by guide shafts 21 and 24 extending in the front-rear direction (A and B directions). Bearing portions 18a and 18b on which the guide shafts 21 and 24 are slidably fitted are provided on the left and right side surfaces of the head carriage 18, respectively. The bearing 18a is formed of a circular hole through which the main guide shaft 21 penetrates.
8 is a main bearing for regulating the moving direction, the left-right direction, and the height position. Further, since the bearing portion 18b is a U-shaped bearing to which the guide shaft 21 is fitted, the bearing portion 18b does not restrict the moving direction and the left-right direction, but restricts only the height position of the head carriage 18.

The head carriage 18 is driven by a voice coil motor 52, which will be described later, to drive the guide shaft 2
1 and the guide shaft 24 moves in the A and B directions. Thus, the magnetic heads 16 and 17 supported by the head carriage 18 can perform magnetic recording / reproduction by sliding in contact with desired tracks of a magnetic disk (not shown) stored in a disk cartridge. .

On the lower surface of the slider 13, a damper mechanism 31 is provided. That is, a shaft 34 for rotatably supporting the damper plate 32 of the damper mechanism 31 and a hook 35 for hooking one end of the torsion spring 33 are provided on the lower surface of the slider 13. The damper mechanism 31 is a mechanical damper mechanism that urges the slider 13 so as to reduce the sliding operation of the slider 13 using a spring force instead of an oil damper. That is, the damper mechanism 31 includes a damper plate 32 rotatably provided on the lower surface of the slider 13 and a torsion spring 33 for urging the damper plate 32.

The damper mechanism 31 urges the slider 13 in the direction opposite to the moving direction (B direction) at the initial stage of the movement of the disk holder 12 from the cartridge insertion / ejection position to the cartridge mounting position, and the slider 13 slides. When the damper plate 32 rotates by a predetermined amount or more during the movement, the slider 13 is configured to be urged in the movement direction (A direction). Therefore, at the time of the disk mounting operation, the damper mechanism 31 uses the spring force of the torsion spring 33 to move the slider 1.
The operation of Step 3 is decelerated to reduce the descent speed of the disk holder 12, that is, the disk mounting speed.

Next, the configuration of each main part configured as described above will be individually described. The disk holder 12
It comprises a top plate 12a, and cartridge guide portions 12b and 12c which are bent to hold the disk cartridge from both sides of the top plate 12a. Therefore, a space surrounded by the top plate 12a and the cartridge guide portions 12b and 12c on both sides becomes a cartridge insertion portion.

The top plate 12a of the disc holder 12 is provided with an opening 12d for the head carriage 18 to move, and a lifter 25 abutting on the right side of the opening 12d comes into contact with a protruding portion 20a protruding from both sides of the head arm 20. It is movably mounted. Therefore, the head arm 20
Is provided to intermittently move the magnetic head 17 up and down in conjunction with the up and down operation of the disk holder 12. Therefore, the disk holder 12, the head arm 20,
The lifter 25 and the like constitute a head moving mechanism.

The lifter 25 has a shaft 25b projecting from both ends of the main body 25a.
It is supported by the support portion 12h standing upright at 2a. Therefore, the lifter 25 is attached rotatably in the E and F directions orthogonal to the carriage movement direction (A and B directions). Further, a pair of engaging pins 12e for engaging with the slider 13 is provided on both sides of the disc holder 12, and guide portions 12f, 12
g is protruding. The guide portions 12f and 12g are fitted in guide grooves 14d and 14e provided in the side walls 14b and 14c of the frame 14, and guide the lifting and lowering operation of the disk holder 12.

The top plate 12a of the disk holder 12
The lifter 25 is rotated so that the locking portion 25c comes into contact with the protruding portion 20a of the head arm 20 and lowers the head arm 20 stepwise as the disk holder 12 moves up and down as described later. I do. In addition, the locking portion 25
c is formed to extend from the innermost track position to the outermost track position of the disk, that is, the length corresponding to the stroke of the head carriage 18.

The slider 13 is slidably mounted above the disk holder 12 and has a J-shaped flat plate 13.
a and the side surface 13 bent downward from both sides of the flat plate 13a
b, 13c and inclined grooves 13d provided on the side surfaces 13b, 13c to which the engaging pins 12e of the disc holder 12 fit.
And an engagement hole 13e that engages with a protrusion 14f that projects from the center of both sides of the frame 14. Furthermore, slider 1
3 has a protruding piece 13g protruding to the front right side, and an eject button 40 is fixed to the protruding piece 13g. The slider 13 is urged in the direction A by a coil spring 41.

FIG. 3 is a front view of the disk drive. FIG.
As shown in FIG. 2, a front bezel 27 having a disc insertion slot 26 is attached to the front end of the frame 14. On the right side of the upper end of the front bezel 27, a concave portion 27a into which the eject button 40 is slidably fitted is provided. A flap 28 for closing the disc insertion opening 26 from the inside is provided on the back side of the front bezel 27 so as to be rotatable in the opening and closing direction.

FIG. 4 shows the disk holder 12 and the slider 13.
It is a side view which shows the state which was combined. As shown in FIG. 4, the engagement pin 12e of the disk holder 12 is fitted in the inclined groove 13d of the slider 13, so that
The sliding operation of the slider 13 drives the engaging pin 12e along the inclined groove 13d. Therefore, when the slider 13 slides in the direction B, the disk holder 12 moves up to the cartridge insertion / ejection position, and when the slider 13 slides in the direction A, it moves down to the cartridge mounting position. Therefore, the recording medium transport mechanism is constituted by the disk holder 12 and the slider 13.

Here, description will be made returning to FIG. The latch mechanism 36 includes a latch lever 38 rotatably supported on the upper surface of the disk holder 12 and a coil spring 41 for urging the latch lever 38 to rotate counterclockwise. In addition, the coil spring 41 is connected to the slider 13
And a latch lever return spring that biases the latch lever 38.

The latch lever 38 is used to open and close a shutter (not shown) of the disk cartridge.
8a and an arcuate hook 38b for hooking the hook 13h of the slider 13. When the disk cartridge is inserted into the disk holder 12, the latch lever 38 is pressed by the front end of the disk cartridge and rotates clockwise. Then, when the arc-shaped engaging portion 38b is separated from the engaged portion 13h of the slider 13, the slider 13 urged by the coil spring 41 slides in the direction A.

As the latch lever 38 rotates in this manner, the tip 38c of the lever 38a presses the shutter (not shown) of the disk cartridge in the opening direction, and the magnetic heads 16 and 17 slide on the magnetic disk. It can be so. Further, when the eject button 40 is pressed in the direction B and the slider 13 slides in the same direction, the locking of the locking portion 38b which has been in contact with the side surface of the locked portion 13h of the slider 13 is released. The latch lever 38 rotates counterclockwise by the spring force of the coil spring 41.

Numeral 45 denotes a carriage stopper, which locks the head carriage 18 at the time of ejection, as will be described later, so that the magnetic heads 16 and 17 are magnetic disks (not shown).
This is a lock member for preventing sliding contact. The carriage stopper 45 is attached in a direction extending in the A and B directions so that the main body 45a faces the right side of the guide shaft 24, and is provided with a bearing (not shown) formed on the frame 14. ), It is rotatably supported in the E and F directions similarly to the lifter 25 described above. The carriage stopper 45 has a rack 45b for locking the head carriage 18 and a V-shaped recess 45c to which an engaging pin 25d protruding from an end of the lifter 25 is engaged.

The right side of the head carriage 18 has
A movable rack 56 facing the rack 45b is provided. The rack 45b is formed to extend from the innermost track position of the disk to the outermost track position, that is, the length corresponding to the stroke of the head carriage 18. Therefore, the carriage stopper 45
By rotating in the direction E, the rack 45b meshes with the movable rack 56 to lock the head carriage 18.

Reference numeral 46 denotes a stopper connecting lever,
4 is rotatably supported by a shaft 44 provided thereon. The stopper coupling lever 46 has an arm portion 46a extending in the direction A and a spring locking portion 46b extending laterally substantially perpendicular to the direction A. The base portion 45 of the carriage stopper 45 is provided at the base of the arm portion 46a.
An oval engaging hole 46c is provided for engaging a protruding pin 45d protruding from the rear portion of the upper surface of FIG.

Spring locking portion 46 of stopper connecting lever 46
One end 47a of the torsion spring 47 is hung on b. The other end 47b of the torsion spring 47 is in contact with the rear inner wall of the frame 14. Therefore, the stopper coupling lever 46 is urged clockwise, that is, in the carriage locking direction, by the spring force of the torsion spring 47.

A solenoid 48 is excited by a command from a control circuit (not shown) to suck the plunger 49 in the direction D. The end of the plunger 49 is connected to the tip of the arm 46a of the stopper connecting lever 46. Therefore, when the solenoid 48 is excited and the plunger 49 is attracted in the direction D, the stopper coupling lever 46 rotates in the counterclockwise direction, that is, in the carriage unlocking direction.

When the solenoid 48 is not excited due to a power failure or the like, the plunger 49 returns in the direction C, and the stopper connecting lever 46 rotates clockwise, that is, in the carriage locking direction. Reference numeral 50 denotes a holding member, which is formed of a sheet metal so that the guide shaft 24, the stopper coupling lever 46, the solenoid 48, and the torsion spring 47 are pressed from above and fixed by being fixed to the frame 14.

A guide shaft pressing member 51 is fixed to the frame 14 in a state where the end of the guide shaft 21 is pressed in a direction D perpendicular to the axial direction. A voice coil motor 52 has a coil 53 integrally provided on the left side surface of the head carriage 18. The voice coil motor 52 is provided on the left side of the guide shaft 21 disposed near the center of gravity of the head carriage 18. Therefore, the head carriage 18 can be driven in the A and B directions by one voice coil motor 52 to perform the seek operation of the magnetic heads 16 and 17. Therefore, the head carriage 18 has a larger configuration than a configuration in which a pair of voice coil motors are provided on both sides of the head carriage 18.
And the space for moving the carriage 18 is also reduced, which can contribute to the downsizing of the magnetic disk drive 11.

Here, the configuration of the peripheral portion of the head carriage 18 will be described. FIG. 5 is an enlarged plan view showing the periphery of the head carriage 18 in the recording / reproducing mode. As shown in FIG. 5, the head arm 20 is supported on a support table 57 of the head carriage 18 via a leaf spring 58 so as to be rotatable in the vertical direction. Further, the head arm 20 is urged downward by a pressing portion 60a extending in the direction A from a torsion spring 60 hooked in a state of being wound around a shaft 59 provided at the rear portion of the support base 57. .

Therefore, the projecting portion 20 a projecting laterally from the head arm 20 is pressed against the upper surface of the locking portion 25 c of the lifter 25 by the spring force of the torsion spring 60. The lifter 25 includes a V-shaped recess 45 provided at an end of the carriage stopper 45 with an engagement pin 25 d protruding from the end.
As described later, the carriage 45 rotates intermittently in conjunction with the rotation of the stopper 45 for the carriage.

Plunger 4 sucked by solenoid 48
Reference numeral 9 is engaged with the tip end 46d of the arm portion 46a of the stopper connecting lever 46. Also, the stopper connecting lever 4
In 6, the spring locking portion 46 b is urged clockwise by the spring force of the torsion spring 47. Therefore, the carriage stopper 45 in which the protruding pin 45 d is engaged with the engagement hole 46 c of the stopper coupling lever 46 is provided with the torsion spring 47.
Pivots in the carriage locking direction (E direction) due to the spring force of. Thereby, the rack 4 of the carriage stopper 45
5b engages with the movable rack 56 of the head carriage 18 to lock the head carriage 18.

At the rear of the frame 14, an eject detection switch 54 for detecting that the slider 13 has slid in the eject direction is provided. The eject detection switch 54 is provided with a slider 13 that slides in the same direction when the eject button 40 is pressed in the B direction.
And is switched to the closed state. FIG. 6 is a plan view showing a disk cartridge contact prevention mechanism constituting a main part of the present invention. FIG. 7 is a diagram for explaining the shape of the protector. FIG. 8 is a side view showing an attached state of the protector.

As shown in FIGS. 6, 7A to 7C, and 8, the frame 1 on the right side of the head carriage 18 is provided.
4, a disc cartridge contact prevention mechanism 81 is provided. The disc cartridge contact prevention mechanism 81 regulates the insertion height position of the disc cartridge so that the insertion end of the disc cartridge does not contact the lower magnetic head 16 when the disc cartridge is inserted into the disc holder 12. I do.

Disk cartridge contact prevention mechanism 81
Is a protector (disc cartridge restricting portion) 82 extending in the disk cartridge insertion direction, a protector arm (restriction releasing portion) 83 attached to the rear end of the protector 82, and a torsion for urging the protector 82 upright. And a spring 84. In FIG. 6, the protector 82 before the disk cartridge is inserted is shown.
Is shown by a solid line, and a state where the protector 82 is rotated after the disk cartridge is inserted is shown by a broken line.

The protector 82 includes a first shaft 86 that is supported by a first bearing 85 provided on the frame 14 and a second shaft that is supported by a second bearing 87 provided on the frame 14. And a disc cartridge sliding contact portion 89 extending radially from the first shaft 86 and the second shaft 88. As shown in FIG. 6, the protector 82, which is mounted to extend in the directions A and B, has a range in which the disk cartridge sliding contact portion 89 is provided. The range in which the protector arm 83 extends to the side is the function effective section, which is the protect function release section for releasing the restriction on the insertion height position of the disk cartridge. The end point of the protection function release section is a latch lever release position described later.

In the disk cartridge contact prevention mechanism 81, the protector arm 83 is pressed by the disk cartridge to perform the retreat operation, that is, the restriction on the insertion height position of the disk cartridge.
4, the number of components arranged on the base plate 4 is reduced, the assembling work is facilitated, and the working efficiency of the assembling process can be improved. FIG. 9 is a longitudinal sectional view showing the configuration of the first bearing 85 along the section AA in FIG.

As shown in FIG. 9, the first bearing 85
Is a hook-shaped step 9 contacting two points on the outer periphery of the first shaft 86.
0 and a pressing plate 91 for pressing the outer periphery of the first shaft 86 from above and from the side. That is, the first shaft 86 is
Horizontal surface 90a of step 90 and vertical surface 90b of step 90
And a horizontal surface 91a of the holding plate 91 and a vertical surface 91b of the holding plate 91, and are rotatably supported by a four-point support structure.

The second bearing 87 is also provided with the first bearing 85.
Since the configuration is the same as that described above, the description of the configuration of the second bearing 87 will be omitted. FIG. 10 is a longitudinal sectional view showing the state of attachment of the torsion spring 84 along the section BB in FIG. As shown in FIG. 10, the torsion spring 84 is connected to the protector 8.
2 is wound around a shaft 92, and one end 84a is
4, the other end 84b is fitted in the groove 93 formed on the side surface of the protector 82 and urges it counterclockwise (upright direction). Therefore, before the disk cartridge is inserted, the protector 82 slides the disk cartridge sliding contact portion 89 with the first shaft 86 and the second shaft 86 by the spring force of the torsion spring 84.
Is held in a direction protruding above a shaft 88 of

FIG. 11 is a longitudinal sectional view showing the state of attachment of the protector arm 83 along the section CC in FIG. FIG.
As shown in FIG. 7, the protector arm 83 has a U-shaped engagement portion 8 which is bent to engage with a concave portion 94 provided between the second shaft 88 and the torsion spring 84 mounting position.
3a, an inclined portion 83b inclined at an angle of approximately α = 45 ° to the side of the protector 82, a bent portion 83c bent into a crank shape at the tip of the inclined portion 83b, and a height of the upright protector 82. And a contact portion 83d extending to a higher position.

The contact portion 83d is inclined at an angle of about β = 45 ° to the side of the protector 82 similarly to the inclined portion 83b. Further, since the ridge line of the contact portion 83d is inclined at 45 degrees with respect to the cartridge insertion direction, the protector arm 83 can rotate smoothly when contacting the disc cartridge. Also, the contact portion 83d
When the disk holder 12 in which the disk cartridge is inserted is lowered to the predetermined mounting position, the lower surface of the disk cartridge abuts. As will be described later, when the disc cartridge comes into contact with the contact portion 83d by the mounting operation of the disc holder 12, the protector arm 83 is tilted in the rotation direction and the contact portion 83d
Is tilted in the cartridge insertion direction, so that the protector 82 is rotated clockwise to rotate the protector 82 in the restriction release direction.

Here, the operation of the disc cartridge contact prevention mechanism 81 when the disc cartridge is inserted into the disc holder 12 will be described. FIG. 12 is a front view showing a state where the disk cartridge is inserted into the disk holder 12. FIG. 13 is a front view showing the protection release operation. FIG. 14 is a front view showing the operating state of the disk cartridge contact prevention mechanism 81 during magnetic recording and reproduction.

As shown in FIG. 12, when the disc cartridge 96 is inserted into the disc holder 12, the protector 82 moves the disc cartridge sliding contact portion 89 by the spring force of the torsion spring 84 so that the first shaft 86 and the second Is held in a direction protruding above a shaft 88 of Therefore, the lower surface of the disk cartridge 96 is
The slide height of the insertion position is regulated by sliding the second disk cartridge sliding contact portion 89. That is, the disk cartridge sliding contact portion 89 regulates the insertion position of the disk cartridge 96 such that the insertion height position of the disk cartridge 96 has a gap S with respect to the lower magnetic head 16. Therefore, the disk cartridge 96 is mounted on the lower magnetic head 16.
Is inserted through a position higher than the head surface by the gap S.

As a result, the insertion-side end of the disk cartridge 96 is prevented from colliding with the lower magnetic head 16, and the lower magnetic head 16 can be prevented from being damaged. FIG.
As shown in (2), when the disk cartridge 96 is further inserted in the direction A and the insertion side end of the disk cartridge 96 reaches the protection function release section, the disk cartridge 96 comes into contact with the contact portion 83d of the protector arm 83. Since the contact portion 83d of the protector arm 83 extends at a position shifted in the radial direction from the shafts 86 and 88 of the protector 82, the contact portion 83d is pressed clockwise by the insertion operation of the disk cartridge 96.

Accordingly, the protector 82 rotates together with the protector arm 83 in the same direction to be inclined. Therefore, the contact point of the protector 82 that contacts the lower surface of the disk cartridge 96 is shifted laterally from the rotation axis by the dimension L.
Thus, the protector 82 rotates clockwise while the disk cartridge 96 is lowered to the mounting position.

As shown in FIG. 14, when the disc cartridge 96 inserted into the disc holder 12 is lowered to the mounting position, the contact portion 83d of the protector arm 83 is pressed downward and at the same time the disc cartridge slides. The portion 89 is also pressed downward by the disk cartridge 96. Therefore, the protector 82 rotates clockwise.

When the disk cartridge 96 arrives at the mounting position, the magnetic heads 16 and 17 are brought into sliding contact with a magnetic disk (not shown) accommodated in the disk cartridge 96 to be in a state where magnetic recording or reproduction is possible. .
When the protector arm 83 rotates, the inclined portion 8 is rotated.
3b comes into contact with the frame 14 to be in a horizontal state. Since the protector arm 83 has a bent portion 83c bent into a crank shape, a space 97 is formed between the disk cartridge 96 and the protector arm 83. Then, the protector 82 is accommodated in this space 97 and is held at a regulation release position that does not hinder the magnetic recording or reproducing operation.

When the disk cartridge 96 is inserted, the insertion side end of the disk cartridge 96 is positioned at the lower magnetic head 1.
6 can be prevented, and a mechanism for transmitting the displacement of the slider 13 is not required unlike the related art, so that the installation space can be reduced and the capacity of the recording medium can be increased. . Next, the disc mounting operation of each mechanism other than the disc cartridge contact prevention mechanism 81 will be described.

As shown in FIGS. 1 and 4, when a disk cartridge (not shown) is inserted into the disk holder 12 from the disk insertion opening 26 of the front bezel 27,
The latch lever 38 is pressed to rotate clockwise. The latch portion 38b of the latch lever 38 is
When the coil spring 4 is separated from the hooked portion 13h,
The slider 13 urged by 1 slides in the A direction.

When the latch lever 38 rotates clockwise in this manner, the engagement of the slider 13 is released, and the tip 38c of the lever 38a opens the shutter (not shown) of the disk cartridge. Both sides of the disk holder 12 are supported on the left and right side surfaces of the frame 14 so as to be movable only in the vertical direction. Therefore, when the slider 13 slides in the direction A, the engaging pin 12e of the disk holder 12 is driven along the inclined groove 13d,
The disk holder 12 descends from the cartridge insertion / ejection position to the cartridge mounting position.

FIG. 15 is an enlarged plan view showing the periphery of the head carriage 18 in the eject mode. As shown in FIG. 15, in the ejection mode, the end of the slider 13 extending in the direction B contacts the ejection detection switch 54 to close the ejection detection switch 54. Therefore, the eject detection switch 54
An ejection detection signal is output to a control circuit (not shown). Thus, the solenoid 48 is demagnetized and displaces the plunger 49 in the direction C.

In the eject mode, since the solenoid 48 is not excited, the stopper coupling lever 46
Are rotated clockwise by the spring force Fa of the torsion spring 47. Therefore, the carriage stopper 45 pivots toward the head carriage 18 to engage the rack 45b with the movable rack 56 on the head carriage 18 side.

The spring force Fa of the torsion spring 47 is
Acts as a pressing force Fb for pressing the protruding pin 45d engaging with the engaging hole 46c of the stopper connecting lever 46 in the C direction. Since the head carriage 18 is driven in the directions A and B by the voice coil motor 52, when there is no driving force from the voice coil motor 52 at the time of, for example, a power outage, the head carriage 18 is not restrained at all and moves without permission. It's easy to do. However, in the eject mode, the rack 45b of the carriage stopper 45 is
The head carriage 18 is engaged with the movable rack 56 on the
Is locked, it is possible to prevent the head carriage 18 from moving without permission.

Even if a power failure occurs during another operation mode, the driving force from the voice coil motor 52 is lost and the solenoid 48 is demagnetized in the same manner as described above. The head carriage 18 can be prevented from moving on its own. FIG.
FIG. 3 is an enlarged plan view showing a peripheral portion of the head carriage 18 in a recording / reproducing mode.

As shown in FIG. 16, when the recording / reproducing mode is in a standby state such as a standby state or a sleep state, the seek operation of the head carriage 18 is not performed. In this case, the solenoid 48 is demagnetized. Let it. As a result, similarly to the above-described ejection mode shown in FIG.
7, the carriage stopper 45 pivots toward the head carriage 18 because it is rotated clockwise by the spring force Fa. Therefore, the rack 45 of the carriage stopper 45
b meshes with the movable rack 56 on the carriage 18 side.

Thus, when the recording / reproducing mode is in the standby state, the head carriage 18 is locked in a state in which the head carriage 18 cannot move in the A and B directions. Next, the operation of the head arm 20 in conjunction with the operations of the carriage stopper 45, the stopper coupling lever 46, the torsion spring 47, and the solenoid 48 will be described.

FIG. 17 is an enlarged plan view showing the periphery of the head carriage 18 when a seek operation is performed in the recording / reproducing mode. As shown in FIG. 17, when the disk cartridge inserted into the disk holder 12 moves to the recording / reproducing position in the recording / reproducing mode, the disk sensor (not shown) is turned on, and the turntable 1 is turned on.
After the rotation speed of a disk motor (not shown) for driving the motor 5 reaches a specified high-speed rotation speed, the solenoid 48 is excited.

Therefore, in the recording / reproducing mode, the solenoid 4
8 is excited to suck the plunger 49 in the D direction. As a result, the stopper coupling lever 46 connected to the plunger 49 rotates counterclockwise to separate the rack 45b of the carriage stopper 45 from the movable rack 45c of the head carriage 18. As a result, the lock on the head carriage 18 by the carriage stopper 45 is released.

Therefore, the head carriage 18 performs a seek operation in the disk radial direction (A and B directions) by the driving force of the voice coil motor 52, so that the magnetic heads 16, 1 are moved.
7 can face a desired track. Plunger 4 attracted in direction D by excitation of solenoid 48
9 is engaged with the tip end 46d of the arm portion 46a of the stopper connecting lever 46, the suction force Fd of the solenoid 48 is enlarged by the leverage principle, and the engaging force Fd is provided in the middle of the arm portion 46a in the longitudinal direction. The force Fe for pressing the protruding pin 45d and the torsion spring 47 engaging with the hole 46c,
Ff. The suction force Fd of the solenoid 48 is determined by the V-shaped concave portion 45 c of the carriage stopper 45.
5 acts as a pressing force Fg for pressing the engaging pin 25d in the D direction.

Therefore, even if the suction force Fd of the solenoid 48 is small, it is enlarged by the stopper coupling lever 46 and transmitted to the carriage stopper 45 and the lifter 25, so that a sufficient driving force can be obtained even if the solenoid 48 is small. . Accordingly, the power consumption of the solenoid 48 can be reduced, and the installation space for the solenoid 48 can be reduced to cope with the downsizing of the device.

FIG. 18 is a front view for explaining the operation of the carriage stopper 45 with respect to the head carriage 18. FIG. 18A shows an operation state in the ejection mode, in which the stopper coupling lever 46 is pressed in the direction C by the spring force of the torsion spring 47.
Therefore, the carriage stopper 45 rotates in the E direction by the spring force of the torsion spring 47, and
Are engaged with the movable rack 56 on the head carriage 18 side. Therefore, the head carriage 18 is locked by the carriage stopper 45.

FIG. 18B shows an operation state in the standby mode. In the standby mode, the stopper coupling lever 46 is pressed in the C direction by the spring force of the torsion spring 47 as in the eject mode. Therefore, the carriage stopper 45 rotates in the direction E by the spring force of the torsion spring 47, and the rack 45b meshes with the movable rack 56 on the head carriage 18 side to lock the head carriage 18.

FIG. 18C shows the operation state in the recording / reproducing mode. In the recording / reproducing mode, as described above, the solenoid 48 is excited, and the stopper coupling lever 46 is driven in the D direction. Therefore, the carriage stopper 45 is rotated in the F direction by the driving force of the solenoid 48, and the rack 45b is separated from the movable rack 56 on the head carriage 18 side to release the lock of the head carriage 18. Thereby, the head carriage 18
Can perform a seek operation in the A and B directions.

FIG. 19 is a front view for explaining the operation of the carriage stopper 45 and the lifter 25 with respect to the head arm 20. FIG. 19A shows an operation state in the ejection mode. The carriage stopper 45 is rotated in the E direction by the spring force of the torsion spring 47, and the rack 45b is moved toward the head carriage 18 side. It engages with the rack 56. Since the disk holder 12 has been raised to the disk ejection / insertion position, the lifter 25 has also been raised.

An adjusting bolt 74 for adjusting the height of the lifter 25 is screwed into the holding member 61. The lower end of the adjustment bolt 74 contacts an abutting portion 75 extending from the end of the lifter 25. Therefore, the adjustment bolt 74
The lift amount of the lifter 25 can be adjusted by changing the amount of screwing into the holding member 61.

In the process of raising the disk holder 12 to the disk ejection / insertion position, the lifter 25
The abutting part 75 provided integrally with the abutment contacts the lower end of the adjustment bolt 74. The lifter 25 is supported on the upper surface of the disk holder 12 so as to swing in the E and F directions about the shaft 25b. Therefore, the abutting portion 75 extending rightward of the lifter 25 with the upward movement of the disk holder 12 abuts on the lower end portion of the adjustment bolt 74, whereby the lifter 2 is lifted.
5 rotates in the F direction.

A protrusion 20 a projecting laterally from the head arm 20 is locked to a lock 25 c provided on the left side of the lifter 25. Therefore, the lifter 25 rotates in the F direction together with the upward movement of the disk holder 12 to lift the protrusion 20a of the head arm 20 upward. As a result, the head arm 20 is connected to the upper magnetic head 17.
Is held at the upward movement position separated from the lower magnetic head 16.

At this time, the engagement pin 25 of the lifter 25
d is separated from the V-shaped concave portion 45c of the carriage stopper 45. FIG. 19B illustrates an operation state in the standby mode. In the standby mode, the head arm 20 temporarily stops at an intermediate position between the disk eject / insert position and the disk mounting position. That is, the engaging pin 25 d protruding in the direction B from the end of the lifter 25 enters the V-shaped concave portion 45 c of the carriage stopper 45 with the lowering operation of the disk holder 12. Then, the engagement pin 25d of the lifter 25 is inserted into the V-shaped concave portion 45c of the carriage stopper 45 and contacts the inclined portion of the V-shaped concave portion 45c.

Thus, the lifter 25 is stopped at an intermediate position from the disk eject / insert position to the disk mounting position. Therefore, the turning operation of the head arm 20 linked to the lifter 25 is temporarily stopped. In the standby mode, since the head arm 20 is stopped at an intermediate position before the head arm 20 descends to the disk mounting position, the magnetic head 17 supported by the distal end of the head arm 20 is supported by the distal end of the carriage body 19. Magnetic head 16
And a predetermined distance S therebetween. Therefore, the upper magnetic head 17 is located above a magnetic disk (not shown).

The lower magnetic head 16 is not in contact with the magnetic disk until the disk holder 12 is lowered to the disk mounting position, but the magnetic disk momentarily comes into contact with the lowering operation of the disk holder 12. FIG. 19 (C)
5 shows an operation state in the recording / reproduction mode. In the recording / reproducing mode, the solenoid 48 is used as described above.
Is excited, and the stopper coupling lever 46 is driven in the D direction.
8, the rack 45b is separated from the movable rack 56 on the head carriage 18 side.
As a result, the lock of the head carriage 18 is released.

The carriage stopper 45 rotates in the F direction, and the V-shaped recess 4 of the carriage stopper 45
5c presses the engagement pin 25d of the lifter 25 in the E direction. Therefore, the lifter 25 rotates in the E direction in conjunction with the rotation of the carriage stopper 45 in the F direction, and the lifter 2
The locking portion 25c of No. 5 descends. Thereby, the head arm 20 also descends. Therefore, after the magnetic head 17 supported by the head arm 20 is stopped at a position close to the magnetic disk (not shown) in the standby mode, the lower magnetic head 16 and the magnetic disk Abut on each other.

As described above, since the magnetic head 17 moves to the recording / reproducing position where the magnetic head 17 slides on the magnetic disk by intermittent operation, the impact on the magnetic disk rotating at high speed is reduced, and the magnetic head 17 is formed on the surface of the magnetic disk. Damage to the magnetic film can be prevented. Note that the ejecting operation is the reverse of the above-described mounting operation, and thus the description thereof is omitted.

In the above embodiment, the magnetic disk device has been described as an example. However, the present invention is not limited to this, and other card-shaped recording medium cartridges such as an optical disk device, a magneto-optical disk device, and a memory card may be used. Of course, the present invention can be applied to a recording / reproducing device to be mounted. In the above embodiment, the configuration in which the slider slides above the disk holder is described as an example. However, the present invention is not limited to this, and the present invention is also applied to a configuration in which the slider slides below the disk holder. can do.

[0080]

As described above, according to the present invention, after the insertion-side end of the recording medium cartridge in which the contact preventing member is inserted into the holder passes through the magnetic head, the recording medium slides on the recording medium cartridge and then slides. The provision of the restriction release part for displacing the cartridge restriction part to the restriction release position prevents the insertion end of the recording medium cartridge from colliding with the magnetic head when the recording medium cartridge is inserted, and reduces the displacement of the slider as in the prior art. Since a transmission mechanism is not required, the installation space can be reduced, and the capacity of the recording medium can be increased. In addition, since the restriction release section is pressed by the recording medium cartridge to perform the evacuation operation, that is, the restriction on the insertion height position of the recording medium cartridge, the number of components disposed on the frame is reduced, and the assembling work is facilitated. Work efficiency in the assembly process can be increased.

[Brief description of the drawings]

FIG. 1 is a plan view of a magnetic disk drive as an embodiment of a recording medium recording / reproducing apparatus according to the present invention.

FIG. 2 is an exploded perspective view showing a schematic configuration of a magnetic disk device.

FIG. 3 is a front view of the disk device.

FIG. 4 is a side view showing a state where the disk holder and the slider are combined.

FIG. 5 is an enlarged plan view showing a peripheral portion of a head carriage in a recording / reproducing mode.

FIG. 6 is a plan view showing a disk cartridge contact prevention mechanism constituting a main part of the present invention.

FIG. 7 is a diagram for explaining the shape of the protector.

FIG. 8 is a side view showing an attached state of the protector.

FIG. 9 is a longitudinal sectional view showing a configuration of a second bearing along a section AA in FIG. 8;

FIG. 10 is a longitudinal sectional view showing a mounting state of the torsion spring along a section BB in FIG. 8;

FIG. 11 is a longitudinal sectional view showing the state of attachment of the protector arm along the section CC in FIG. 8;

FIG. 12 is a front view showing a state where a disk cartridge is inserted into a disk holder.

FIG. 13 is a front view showing a protection release operation.

FIG. 14 is a front view showing an operation state of the disk cartridge contact prevention mechanism during magnetic recording and reproduction.

FIG. 15 is an enlarged plan view showing a peripheral portion of a head carriage in an ejection mode.

FIG. 16 is an enlarged plan view showing a peripheral portion of a head carriage in a recording / reproducing mode.

FIG. 17 is an enlarged plan view showing a peripheral portion of a head carriage when a seek operation is performed in a recording / reproducing mode.

FIG. 18 is a front view for explaining the operation of the carriage stopper with respect to the head carriage.

FIG. 19 is a front view for explaining operations of a carriage stopper and a lifter with respect to a head arm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Disk device 12 Holder 13 Slider 14 Frame 16 and 17 Magnetic head 18 Head carriage 21 and 24 Guide shaft 25 Lifter 25d Engagement pin 31 Damper mechanism 33 Torsion spring 36 Latch mechanism 38 Latch lever 45 Carriage stopper 45b Rack 45c V-shape Recess 46 stopper coupling lever 47 torsion spring 48 solenoid 49 plunger 50 holding member 51 guide shaft pressing member 52 voice coil motor 56 movable rack 81 disk cartridge contact prevention mechanism 82 protector 83 protector arm 84 torsion spring 85 first bearing 86 first Shaft 87 second bearing 88 second shaft 89 disk cartridge sliding portion 96 disk cartridge

Claims (1)

[Claims] When the recording medium cartridge is inserted into a holder into which the recording medium cartridge is inserted, the insertion position of the recording medium cartridge is regulated so that the end of the recording medium cartridge does not contact the head. In the recording medium recording / reproducing apparatus having a contact preventing member, the contact preventing member slides on the recording medium cartridge immediately before the insertion-side end of the recording medium cartridge inserted into the holder passes through the head. A recording medium cartridge restricting portion that regulates an insertion height of the recording medium cartridge; and an insertion-side end of the recording medium cartridge inserted into the holder passes through the head, and then slides into contact with the recording medium cartridge. And a restriction release section for displacing the recording medium cartridge restriction section to the restriction release position. Recording medium recording / reproducing device.