JP2534130Y2 - Magnetic disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive, and more particularly, to a magnetic disk drive in which a disk case containing a magnetic disk is inserted at a predetermined height.

[0002]

2. Description of the Related Art For example, in a magnetic disk drive in which a 5-inch flexible magnetic disk is mounted and magnetic recording and reproduction is performed, an operation lever on the front of the device is turned 90 degrees after a disk case is inserted through an insertion slot. Thus, the magnetic disk is clamped. However, in this conventional device, not only is the operation of the operation lever troublesome, but also the operation lever can be operated even when the disk case is not completely inserted, so that the magnetic disk that is being inserted may be clamped. was there.

[0003] The applicant of the present invention has disclosed Japanese Utility Model Application No. 3-31026.
We have proposed a magnetic disk drive that can be configured to clamp a magnetic disk without operating the operation lever. In this proposed magnetic disk drive, a clamp arm is provided on a transverse member suspended above a chassis on which a magnetic disk is mounted, and a clamper is provided on a tip of the clamp arm rotatably supported by the transverse member. When the disk case is inserted, the lever mechanism rotates to press the base end of the clamp arm. And
The clamp arm rotates around a rotation fulcrum supported by the horizontal member to lower the clamper, and clamps the magnetic disk between the clamper and the turntable by the spring force of a leaf spring at the tip of the clamp arm. Further, in the magnetic disk device, a disk insertion guide is provided on the clamp arm so that the insertion tip portion of the disk case inserted into the device does not come into contact with the lower magnetic head, and the disk case is moved relative to the lower magnetic head. The lower limit of insertion height was regulated.

[0004]

However, in the magnetic disk drive, the disk insertion guide is rotatably supported by the shaft of the clamp arm, and the disk insertion guide contacts the chassis during the clamping operation and rotates to clamp the disk. Although the clamp operation of the arm is not hindered, the disc insertion guide may be tilted due to backlash with the shaft. However, when inserting the disk case, since the insertion height position is regulated so that the insertion tip of the disk case rides on the disk insertion guide, if the disk insertion guide is inclined to lift the disk case, There is a problem that the insertion tip of the disk case may come into contact with the upper magnetic head.

Accordingly, an object of the present invention is to provide a magnetic disk drive which solves the above-mentioned problems.

[0006]

SUMMARY OF THE INVENTION The present invention has a latch lever which is rotated by being pressed by a disk case containing a magnetic disk and releases the lock of a slide lever. In a magnetic disk device that clamps the magnetic disk by lowering a clamper provided at the tip of a clamp arm, the latch lever is provided with a restricting portion that restricts the upper limit position of insertion of the disk case.

[0007]

By providing the latch lever with a regulating portion for regulating the upper limit of the insertion of the disk case, the disk case can contact the upper magnetic head even when the disk insertion guide lifts the disk case when the disk case is inserted. Touching is prevented.

[0008]

1 to 3 show an embodiment of a magnetic disk drive according to the present invention.

In each of the drawings, a magnetic disk drive 1 has a front bezel 3 having a disk insertion slot 3a mounted on the front of a flat chassis 2 on which a disk case (not shown) containing a 5-inch magnetic disk is mounted. Have been. The chassis 2 is integrally formed by, for example, aluminum die-casting. As shown in FIG. 2, support stands 2a to 2d on which a disk case is mounted project from the upper surface, and edges of the disk case are mounted on both ends. The stepped portions 2e and 2f to be protruded.

Reference numeral 4 denotes a latch lever, which is a contact portion 4a with which an insertion side edge of a disk case 33 (see FIGS. 10 and 11) contacts, and a locking pin 4b which locks a slide lever 6 described later. And is rotatably supported on the chassis 2 by a shaft 4c. As shown in FIG. 4, the latch lever 4 is a base 4 on which the locking pin 4b and the shaft 4c stand.
The contact portion 4a is bent 90 degrees at d and stands upright in the vertical direction. The contact portion 4a is formed with a disc regulating portion 4e which is inclined at an inclination angle α = 60 °, for example.

The disk restricting portion 4e slides the insertion-side tip of the inserted disk case 33, and restricts the upper-limit height of the disk case 33 while the latch lever 4 rotates in the insertion direction. This insertion upper limit height position is a position where the disk case 33 does not come into contact with an upper magnetic head described later.

The lower limit of the insertion height of the disk case 33 is regulated by a disk insertion guide 25 described later.

Reference numeral 5 denotes a coil spring, one end of which is a latch lever 4
And the other end is hooked to a hook 13h of the base 13 described later. Therefore, the latch lever 4 is urged counterclockwise by the tensile force of the coil spring 5.

Reference numeral 6 denotes a slide lever which is slidably provided in the A and B directions by pins 2h and 2i fitted in the slots 6a and 6b. The slide lever 6 has a T-shaped hole 6c into which the locking pin 4b of the latch lever 4 is fitted. Before the disk case 33 is inserted, the slide lever 6 is moved in the direction A by the locking pin 4b of the latch lever 4. Locked.

Reference numeral 7 denotes a coil spring, one end of which is hooked to the chassis 2 and the other end of which is hooked to a hook (not visible in FIG. 3) of the slide lever 6. Therefore, the slide lever 6 is urged in the direction B by the tensile force of the coil spring 7.

Reference numeral 8 denotes a damper having a gear 8a meshing with the rack 6e of the slide lever 6. That is, when the slide lever 6 slides in the A and B directions, the rotational load of the gear 8a is transmitted to the rack 6e, and the operating speed of the slide lever 6 is reduced.

Reference numeral 9 denotes a connecting lever, which is a shaft 2j on the chassis 2.
It is rotatably supported by. The connecting lever 9 includes a first arm 9a which is curved so as to avoid the turntable 10 and extends in the lateral direction, and a second arm 9b which projects in a direction opposite to the first arm 9a. Have. First arm 9a
Is formed into a bifurcated engagement portion 9c.
Engages with a protruding pin 6f protruding below the slide lever 6. Therefore, when the slide lever 6 slides in the directions A and B, the connecting lever 9 rotates about the shaft 2j. The connecting lever 9 is provided with a cam 9d having a step-like step on the lower side of the tip of the second arm 9b.

The turntable 10 is provided on a substrate 19 attached to the lower surface of the chassis 2, and a turntable drive motor 20 is provided on the lower surface of the substrate 19.
An optical sensor 22 for detecting that the magnetic disk in the disk case 33 is clamped, a connector 23, a control circuit (not shown), and the like are provided on the substrate 21 provided adjacent to the substrate 19. Have been.

As shown in FIG. 5, the optical sensor 22 comprises a photointerrupter having a light emitting element 22a and a light receiving element 22b. As will be described later, an optical sensor 22 has a space 22c formed between the light emitting element 22a and the light receiving element 22b. When the protruding portion 25a of the disc insertion guide 25 enters and the light from the light emitting element 22a is cut off, a disc clamp detection signal is output. By outputting the disk clamp detection signal, the rotation of the turntable drive motor 20 for centering during the clamping operation is stopped. Therefore, the turntable drive motor 20 is stopped after the disk case 33 is inserted into the device, thereby saving power.

Returning to FIGS. 1 to 3, the description will be continued. 11
Is an eject button, which is fixed to the end of the slide lever 6 and is pushed in the direction A when the mounted disc case 33 is ejected.

Reference numeral 12 denotes a clamp arm, which is a bracket 13a, 13b of a base 13 which is suspended above the chassis 2.
The shaft 14 is supported by a shaft 14. As shown in FIGS. 6 and 7, a “C” -shaped leaf spring 15 is attached to one end of the clamp arm 12.
At the other end, a roller 12a that abuts on a cam 9g rising from the second arm 9b of the connecting lever 9 is supported. or,
The clamp arm 12 is an arm 1 extending laterally (direction A).
2b, a disc insertion guide 25 extending in the B direction is provided at the tip of the arm 12b.

A clamper 16 is supported by a leaf spring 15 and moves up and down by the rotation of the clamp arm 12. The clamper 16 is suspended so as to be inserted into the opening 13 c of the base 13, and is fitted to a guide pin 26 a projecting downward from a bracket 26 laid over the opening 13 c to move vertically. Guided.

As shown in FIG. 8, a coil spring 17 for urging the clamp arm 12 in a counterclockwise direction (D direction) is interposed between the base 13 and the clamp arm 12.
Therefore, the clamp arm 12 before the disk is inserted rotates in the direction D around the shaft 14 by the spring force of the coil spring 17 to separate the clamper 16 from the turntable 10.

Further, on the base 13, a substrate 29 provided with a reflection type optical sensor 27 for detecting an index hole (not shown) of the magnetic disk and an optical sensor 28 for detecting a write protection (write protection) is mounted. Have been. When the optical sensor 28 detects the insertion of the disk case, the turntable 10 rotates so that the magnetic disk can be easily centered during the clamping operation.

The base 13 is provided with small holes 13d to 13g at the left and right ends through which four screws 18a to 18d are inserted, and the screws 18a to 18g inserted into the small holes 13d to 13g.
18d is screwed into the screw holes 2n to 2q of the chassis 2 to be fixed to the edges 2k and 2m protruding from both sides of the chassis 2. As a result, the clamper 16 is held at a position facing the turntable 10 from above, and the rollers 12a
Is positioned at a position where the connecting lever 9 comes into contact with the cam 9g.

As shown in FIG. 9, the disc insertion guide 25 is supported by a shaft 12c at the tip of the arm 12b so as to be rotatable in the directions E and F with respect to the arm 12b of the clamp arm 12. The disc insertion guide 25 is urged to rotate in the direction E by the spring force of the torsion spring 24 so as to be parallel to the arm 12b. On the lower surface of the disc insertion guide 25, a protruding portion 25a that functions as a detected portion at the time of disc clamping protrudes downward.

Incidentally, as described above, the disc insertion guide 25
Is configured to be rotatable, so that the clamp arm 12 comes into contact with the chassis 2 and rotates in the F direction while descending to the clamp position. Therefore, the distance between the arm 12b and the disk insertion guide 25 is increased at the time of inserting the disk so that the disk insertion operation can be easily performed. Corresponds to a reduction in the thickness of the apparatus by reducing the space between the arm portion 12b and the disk insertion guide 25 to reduce the space in the vertical direction.

Reference numeral 31 denotes a head carriage, which is slidably provided on the chassis 2 in the disk radial direction (A and B directions). As shown in FIG. 10, the head carriage 31 has a lower arm 31 provided with a lower magnetic head 31a.
b and the upper arm 3 provided with the upper magnetic head 31c
1d. The upper arm 31d is provided rotatably in the up-down direction. Before the disk is inserted, the engaging portion 31e protruding laterally contacts the arm portion 12b of the clamp arm 12 and rotates upward. .

Reference numeral 32 denotes a carriage drive motor, which is attached to the rear portion of the chassis 2 and rotationally drives a lead screw 32a engaged with the head carriage 31 to move the head carriage 31 in the A and B directions.

Here, the operation of the magnetic disk drive 1 having the above configuration will be described.

In the magnetic disk drive 1 before the disk case 33 is inserted, the slide lever 6 is locked at the position where the slide lever 6 has been slid in the direction A by the eject operation, and the clamper 16 is at a position separated from the turntable 10. It is rising. The upper arm 1 of the head carriage 18
8d is also rotating upward.

Now, when the disk case 33 is inserted into the magnetic disk device 1, the front edge on the insertion side of the disk case 33 comes into contact with the contact portion 4 a of the latch lever 4. At this time, the disk case 33 is slidably in contact with the upper surface of the disk insertion guide 25, and is regulated to the lower insertion limit position, that is, the position where the insertion end of the disk case 33 does not contact the lower magnetic head 31a. As shown in FIG. 11, the insertion-side tip of the disc case 33 contacts the contact portion 4a of the latch lever 4 and also contacts the inclined disc regulating portion 4e. When the optical sensor 28 detects the disk case 33, the turntable 10 rotates to facilitate centering of the magnetic disk during the clamping operation.

Further, when the disk case 33 is pressed in the direction A, the latch lever 4 rotates clockwise about the shaft 4c. As described above, when the latch lever 4 is rotated by being pressed by the disk case 33, the disk case 33 is rotated.
The leading end of the disk control portion 4e slides on the inclined disk control portion 4e and is guided so as to contact the base of the disk control portion 4e. As a result, the insertion-side tip of the disk case 33 is restricted to the insertion upper limit position, that is, the position where the insertion-side tip of the disk case 33 does not contact the upper magnetic head 31c.

Therefore, the lower limit position of the disk case 33 is regulated by the disk insertion guide 25 and the upper limit position of the disk case 33 is regulated by the disk restricting portion 4e of the latch lever 4, so that the lower magnetic head 31a and the upper magnetic head 31c. It can be inserted smoothly without abutment.

The rotation of the latch lever 4 causes the locking portion 4
The lock of the slide lever 6 by b is released, and at the same time, the slide lever 6 slides in the B direction by the tensile force of the coil spring 7. Further, the slide lever 6 operates smoothly due to the resistance of the damper 8.

The disk case 3 inserted as described above
3 reaches a predetermined insertion position, and the center hole 30a of the magnetic disk 30 coincides with the turntable 10. When the slide lever 6 slides in the direction B as described above,
The connecting lever 9 engaging with f rotates clockwise about the shaft 2j. Therefore, the roller 12 of the clamp arm 12
The cam 9g of the connecting lever 9 that has been in contact with the cam 9g is displaced in the same direction, and the contact position of the roller 12a moves from a low place of the cam 9g to a high place through an inclined portion.

Therefore, the clamp arm 12 is connected to the shaft 1
The clamper 16 rotates in the direction C (see FIGS. 6 and 7) around the center 4 and descends toward the guide hole 10a of the turntable 10 while being guided by the guide pin 26a.

Thus, the magnetic disk 30 in the disk case is clamped by the clamper 16 and the turntable 10. At this time, the turntable 10 is rotating, and the magnetic disk 30 can be accurately centered.
Further, the clamper 16 presses the magnetic disk against the turntable 10 by the pressing force of the leaf spring 15.

Along with the clamp operation, the disk insertion guide 25 provided on the arm portion 12b extending to the side (direction A) of the clamp arm 12 is lowered together with the clamp arm 12. As a result, the upper arm 31b of the head carriage 31 descends to bring the upper magnetic head 31c into contact with the magnetic disk 30. As described above, the disc insertion guide 25 enters the space 22c of the optical sensor 22 while rotating in the F direction while abutting on the chassis 2 in the process of descending. Therefore, the projecting portion 25a of the disc insertion guide 25 enters between the light emitting element 22a and the light receiving element 22b to block light from the light emitting element 22a and
Not to reach.

As a result, the optical sensor 22 outputs a disk clamp detection signal, and the rotation of the turntable drive motor 20 during the clamp operation is stopped by outputting the disk clamp detection signal. In the magnetic disk drive 1, the magnetic head 3 is located on the upper and lower surfaces of the magnetic disk.
1a and 31c are brought into sliding contact with each other to enable magnetic recording and reproduction.

The magnetic disk clamping operation and the lowering operation of the upper arm 31d of the head carriage 31 are performed by rotating the connecting lever 9, and the driving force is the pulling force of the coil spring 7. However, the connecting lever 9 has a length of the first arm 9a longer than that of the second arm 9b, and the force for rotating the clamp arm 12 is enlarged by the principle of leverage. Is transmitted a sufficient clamping force.

The disk case 33 mounted as described above
In order to eject, it is only necessary to press the eject button 11 in the A direction. When the eject button 11 is pressed in the direction A and the slide lever 6 slides in the same direction, the latch lever 4 rotates counterclockwise along the hole 6 c of the slide lever 6 by the tensile force of the coil spring 5. Therefore, the latch lever 4 moves the disk case 33 to B
And the slide lever 6 is locked at the eject position.

Further, the connecting lever 9 is connected to the slide lever 6
Rotates counterclockwise in conjunction with the above-mentioned sliding operation. As a result, the contact position of the roller 12a moves to a lower position of the cam 9g, and the clamp arm 12 rotates in the D direction by the pressing force of the torsion spring 17, and raises the clamper 16 to separate it from the turntable 10. At the same time, the disc insertion guide 25 also moves up, and the upper arm 31d rotates upward. Since a series of these operations are performed simultaneously, at the same time when the eject button 11 is pressed, the clamper 16 and the upper arm 31d are raised and the disc case 3 is moved.
3 is pressed by the latch lever 4 and ejected.

[0044]

As described above, in the magnetic disk drive according to the present invention, since the latch lever is provided with the restricting portion for restricting the upper limit position of insertion of the disk case, the latch lever is pressed by the disk case to rotate. The insertion position of the disk case can be regulated to a predetermined height, and when the disk case is inserted, the disk case can be prevented from contacting the upper magnetic head even if the disk insertion guide lifts the disk case. It has features such as accurate and safe insertion.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a magnetic disk drive according to the present invention.

FIG. 2 is an exploded perspective view of a base and a chassis that support a clamp arm.

FIG. 3 is an exploded perspective view of the magnetic disk drive.

FIG. 4 is a view of a latch lever.

FIG. 5 is a diagram showing a disc insertion guide and an optical sensor.

FIG. 6 is a side view of a clamper and a clamp arm.

FIG. 7 is a longitudinal sectional view for explaining a clamper operation.

FIG. 8 is an exploded perspective view of a clamper, a clamp arm, and a base.

FIG. 9 is a diagram showing the operation of a disc insertion guide.

FIG. 10 is a side view of the head carriage.

FIG. 11 is a view showing a disk case insertion operation and a latch lever.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Magnetic disk drive 2 Chassis 4 Latch lever 4e Disk control part 6 Slide lever 7 Disk case 9 Connection lever 10 Turntable 12 Clamp arm 13 Base 14 Shaft 15 Leaf spring 16 Clampers 18a-18d Screw 20 Turntable drive motor 22 Optical sensor 25 Disc insertion guide

Claims (1)

(57) [Scope of request for utility model registration] 1. A clamper provided at a tip of a clamp arm having a latch lever which is rotated by being pressed by a disk case containing a magnetic disk and releases the lock of the slide lever, and the lock lever is released from the lock. A magnetic disk device for clamping the magnetic disk by lowering the disk case, wherein the latch lever is provided with a restricting portion for restricting an upper limit position of insertion of the disk case.