JP2647643B2 - 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 front panel can be easily removed and attached.

[0002]

2. Description of the Related Art In a magnetic disk drive, a front panel is mounted on the front side of a chassis provided with various components including a drive mechanism, a magnetic head, and an eject plate. The front panel is provided with a cassette insertion slot for inserting and removing a cassette of a magnetic disk, and a push button hole into which a push button for external operation of the eject plate fits.

[0003]

The maintenance and inspection of the magnetic disk drive removes and attaches the front panel.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a front panel which can be easily attached and detached, and in which the front panel is not excessively bent.

[0004]

SUMMARY OF THE INVENTION The present invention provides a chassis having a bottom portion and both side walls provided on both sides of the bottom portion so as to extend in the front-rear direction, a magnetic head, a rotary drive mechanism, an eject plate, and a magnetic head provided in the chassis. A cassette accommodating body for accommodating a cassette which can be freely inserted and removed, wherein the cassette accommodating body is provided so as to be vertically movable in the up and down direction of the chassis so as to approach or separate from the bottom of the chassis, and to insert and remove the cassette for inserting and removing the cassette. An opening is provided on the front side of the cassette housing, the eject plate is provided to be movable back and forth in the front-rear direction of the chassis so as to be orthogonal to the vertical movement direction of the cassette housing, and the eject plate is interlocked with the front-rear movement of the eject plate. The eject plate and the cassette housing are connected so that the cassette housing moves up and down, and the cassette A boss receiving portion is provided in the rotation drive mechanism for engaging and disengaging a coupling boss portion of a built-in magnetic disk, and the engagement and disengagement of the coupling boss portion and the boss receiving portion causes the cassette housing to move up and down. In the magnetic disk drive device performed in accordance with the above, the eject plate is provided with a substrate portion and both side plates extending in the front-rear direction in which both sides of the substrate portion are bent at right angles, and a push button for external operation is provided on the front side of the substrate portion. The eject plate is disposed in the chassis such that the board portion of the eject plate is on the inner bottom surface of the bottom portion of the chassis, and the both side plates are respectively adjacent to the inner side surfaces of both side walls of the chassis. the provided panel before it is attached to cover the front of the chassis, this front panel and out of cassette at a position facing the cassette insertion and removal opening of the cassette housing body A push button hole is provided to provide a set insertion / removal opening and slidably fit so that a push button for external operation protrudes from the front surface of the front panel, and is provided at both left and right ends of the front panel along both side walls of the chassis. Providing a locking arm extending from the front side to the rear side,
A locking claw is provided at a tip of the locking arm, and an engagement portion with which the locking claw is engaged is provided on the side wall portions.

[0005] The front panel is disengaged from the chassis by using a screwdriver or the like to release the locking claws of the front panel which are engaged with the engagement portions on the side walls of the chassis.

When the front panel is pressed against the front part of the chassis, the locking pawls are engaged with the engaging parts on both side walls by aligning the front panel with the push button hole of the front panel facing the external operation push button. I do.

[0007]

FIG. 1 shows an embodiment of the present invention.
An embodiment of the present invention will be described with reference to FIG.

1 and 2, reference numeral 1 denotes a magnetic disk,
Reference numeral 2 denotes a flat cassette containing a magnetic disk, 3 denotes a cassette housing, and 4 denotes a hub (connection boss) having a guide groove 5 for guiding a guide body 6 of a hub receiver 7 (boss receiver). .

Reference numeral 8 denotes a chassis, to which various parts of the apparatus are attached. Reference numeral 9 denotes a boss formed integrally with the chassis 8. On the inner diameter side of the boss 9, a magnetic head built in the cassette 2 is provided. Driving device 1 for rotating disk 1
A housing 11 for supporting the housing 11 is mounted.

On a shaft 12 directly connected to the drive unit 10, a hub receiver 7 for mounting the hub 4 provided at the center of the magnetic disk 1 is provided. The magnetic disk 1 is fixed to the hub 4 and is configured to be mounted on the tip of the shaft 12 and to be centered.

[0011] Cassette housing 3 into which cassette 2 is inserted
FIG. 4 and FIG.
As shown in FIG. 5, the guide hole 1 provided on the side of the chassis 8
3 (FIG. 1) is configured to be able to move up and down a guide portion (hereinafter, referred to as a guide hole).
A bent projection 14 is formed at the front center of the upper surface of the magnetic disk 1. A leaf spring 16 for applying an appropriate load to the central hub 4 of the magnetic disk 1 via a collet 15 guides the bent projection 14. It is fixed to the cassette housing 3 by caulking or welding.

As also described in detail in FIG. 8, a collet support 17 is provided on the upper part of the leaf spring 16, and a collet 15 is attached to one end of the collet support 17 and at the same time, a collet support 17 is provided near the collet support. Leaf spring hooking part 18 provided
The end 19 of the leaf spring 16 is hooked on the cassette housing 3
Slit 2 provided at a position corresponding to bent projection 14 of
0 is inserted into the bent projection 14.

Therefore, since the load acting on the collet 15 of the leaf spring 16 acts on the leaf spring catching portion 18 near the collet 15, the spring constant of the leaf spring 16 can be reduced, and the pressing force applied to the collet 15 is kept constant. Can be

The other end of the collet support 17 is connected to a cassette slot 22 of a front panel 21 mounted on the front of the apparatus.
The support portion 23 is provided below the support portion 23 and is supported by the support portion 23 and the slit 20 inserted into the bent projection 14. The cassette slot 22 is positioned so as to face a cassette insertion slot provided on the front side of the cassette housing 3.

In such a configuration, when the cassette 2 shown in FIG. 1 is not inserted, as shown in FIG. 4, the cassette housing 3 is lifted by the eject plate 24, so that the collet support is provided. One end of 17 is in contact with the support portion 23 of the front panel 21, and the collet 15 attached to the other end of the collet support 17 uses the slit 20 as a fulcrum to resist the spring force of the leaf spring 16 attached to the cassette housing 3. Lifted.

The lower surface of the collet 15 is set to be higher than the upper surface of the cassette housing 3 when it is lifted.

Accordingly, even if the height of the cassette housing 3 is set to be substantially the same as the thickness of the cassette 2 inside, the cassette housing 3 does not come into contact with the collet 15 when the cassette 2 is inserted.

Next, as shown in FIG. 2, when the cassette 2 is inserted into the cassette housing 3, as shown in FIG.
The lock of the eject plate 24 by the lock mechanism 53 (the details of the lock mechanism 53 will be described later) is released, and the cassette housing 3 falls downward as described below, and the hub 4 of the magnetic disk 1 is At the same time as being mounted on the hub receiver 7, the front end of the collet support 17 is separated from the support portion 23 of the front panel 21, so that the collet 15 lifted on the slit 20 as a fulcrum is pressed against the hub 4 by the leaf spring 16. Then, the hub 4 of the magnetic disk 1 is pressed against the hub receiver 7.

The operation of FIGS. 4 and 5 will be described later in detail.

Further, as shown in detail in FIG.
1 are provided on both sides of the cassette 2 when the apparatus is not in use.
Mounting hole 26 for mounting a door 25 for closing the door 2
A door spring (a helical spring) 27 for giving elasticity is attached to the door 25 while passing through an insertion shaft 28 formed integrally with the door 25 while elastically deforming the door 25 in the longitudinal direction. It is rotatably supported in the hole 26.

Reference numeral 29 denotes a spring hook for preventing the door spring 27 from coming off.

Further, notches 31 of both side walls 30 formed integrally with the chassis 8 (note that FIGS.
The notch 31 is not shown), and the holding portion 32 for holding the front panel 21 is provided on the front panel 2.
1 are integrally formed on both side surfaces.

According to such a front panel configuration, the door 2
5 and the door spring 27 are simply provided, and the number of components is smaller than that of the conventional door structure, so that an inexpensive configuration can be achieved. Also, since the cassette door 22 is closed by one door 25, the design is simple.

Since the front panel 21 and the door 25 described above correspond to the main parts of the present invention, they will be described in more detail with reference to FIG.

The front panel 21 covers various components provided inside the chassis 8 and also prevents foreign substances from entering the inside of the chassis 8. Therefore, the door 25 is also provided at the cassette entrance 22 so that the cassette entrance 22 is closed by the door 25 when the cassette 2 is not inserted.

The holding portion 32 of the front panel 21 is
Provided at the tip of -1 and the locking arm 32-1 Oh Rukakaritometsume 32
2 The locking arm 32-1 is on the back side of the front panel 21,
It is formed at both left and right ends so as to extend toward the chassis 8.

The locking claw 32- at the tip of the locking arm 32-1
2 engages with the notch 31. This notch 3
1 (engaging portion) is provided on both side plates 30 (sidewall portion). The side wall portions 30 are formed so as to rise at both left and right ends of the chassis 8.

The reason why the locking arms 32-1 are provided at the left and right ends of the front panel 21 is that there is no such a side wall as the engaging portion (notch 31) at the upper part of the chassis 8. Although there are other reasons. That is, front panel 2
Numeral 1 has a low and long horizontal shape. Since it has a cassette insertion / removal port 22 for a thin cassette, it becomes horizontally long. In addition, the front panel 21 has to be made horizontally long in response to a demand for thinning of the magnetic disk drive itself. As described above, in the case of the horizontally long one, since the both ends in the longitudinal direction are locked firmly and stably, the locking arms 32-1 are provided at the left and right ends of the front panel 21. .

[0029] The front panel 21, the cassette loading and unloading opening 2
2, a push button hole 24-1 is provided. An external operation push button 24-2 provided at an outer end of the eject plate 24 is slidably fitted in the push button hole 24-1. The slide of the external operation push button 24-2 moves in the direction of moving back and forth along the depth direction of the chassis 8. That is, the external operation push button 24-2 slides so as to largely protrude outside the front panel 21 or conversely move backward.

The mounting of the front panel 21 to the chassis 8 is performed after various components are incorporated into the chassis 8 and the external operation push button 24-2 is mounted on the eject plate 24.

The external operation push button 24-2 is connected to the front panel 2
1 by pressing the front panel 21 against the front part of the chassis 8 so as to be fitted in the push button hole 24-1 of the chassis 8 so that the locking claw 32-2 is engaged with the engagement part (cut off) of the side wall part of the chassis 8. It engages with the notch 31). In this manner, the front panel 21 is attached to the front portion of the chassis 8, and the left and right ends, which are the longitudinal directions of the front panel 21, are locked, so that a firm and stable fixation is maintained.

When the front panel 21 is attached to the chassis 8, the locking arm 32-1 having a locking claw 32-2 at the tip is shaped so as to extend toward the chassis 8. The front panel 21 can be easily attached by an assembling method of pressing the front panel 21 against the front portion of the chassis 8. The locking arm 32-1 upon attachment of the front panel 21 extending, so bent, is that the front panel 21 is bent by force, such <br/> physician. Rather than shall deformation displacement or push button hole 24-1 of the external operation push button 24-2 and pushbutton bore 24-1 by excessive deformation of the front panel 21 is produced, the push button hole 2
The push button 24-2 for external operation is smoothly and smoothly inserted into 4-1 and does not hinder assembly.

As described above, the front panel 21 may be removed during maintenance and inspection of the magnetic disk drive. Pressing the locking claw 32-2 with the tip of a screwdriver causes the locking arm 32-1 to be easily bent and the locking claw 32-2 to be disengaged from the engaging portion.
The front panel 21 can be easily removed from the chassis 8. After the maintenance and inspection, the front panel 21 is attached to the chassis by the above-described assembling method.

Next, in FIGS. 1 to 3, reference numeral 33 denotes a carriage. At the tip of the carriage 33, a lower magnetic head 34 for writing and reading data on the lower surface of the magnetic disk 1 is provided.

An upper magnetic head 35 for writing data to and reading data from the upper surface of the magnetic disk 1 is provided at the top of the head arm 36.

Usually, the center of the read / write core between the lower magnetic head 34 and the upper magnetic head 35 is 100 TPi.
In the case of (track density of 100 tracks per inch), positioning is performed by shifting by 8 tracks.

Reference numeral 37 denotes a head arm spring for applying an appropriate load when the upper magnetic head 35 comes into close contact with the magnetic disk 1.

The carriage 33 and the head arm 36 configured as described above move along a concentric recording band formed on the magnetic disk 1 via a steel belt 40 attached to a pulley 39 of a stepping motor 38. I do.

Reference numeral 41 denotes a screw for attaching the steel belt 40 to the pulley 39. The tip of the attachment screw 41 is moved from the position of the outermost track and the innermost track recorded on the magnetic disk 1 to the carriage. The stopper 42 hits so that 33 does not shift more than two tracks.

This is detected by the outermost track detection sensor 43 during normal use. However, if the outermost track moves two or more tracks in the outer circumferential direction from the outermost track at the time of transportation or the like, the outermost track may be detected due to the characteristics of the stepping motor 38. This is because there is a possibility that the user cannot move to the truck.
Further, when the stepping motor 38 runs out of control due to some influence, the styrene belt 40 is prevented from being cut.

Reference numeral 41 denotes a locking projection formed integrally with the chassis 8, and penetrates through the eject plate 24.

The eject plate 24 is provided on both sides of the locking projections 44 with bent portions 46 for locking push-back biasing means (hereinafter, referred to as return springs) including return springs 45. .

As shown in detail in FIG.
Is bent to a curvature substantially corresponding to the diameter of the locking projection 44, and an arbitrary curvature 47 is provided on both sides thereof.
The central curvature portion 48 is connected smoothly. Further, the curvature 47
Further outwardly, an arm 49 of an appropriate length is extended.

The return spring 45 having such a shape is made of an elastic wire or the like. The return spring 45 elastically (or locks) the central curvature portion 48 to the locking protrusion 44. is there. The upper part is pressed by a retaining part 50 formed integrally with the chassis 8. Then arm 4
9 is locked to a bent portion 46 provided on the eject plate 24, and by this locked state, the eject plate 2 is locked.
4 is urged to push back to the front panel 21 side.

As shown in FIGS. 3 and 6, the eject plate 24 has a lock projection 51, a horizontal portion 24a, and an inclined groove 5 as shown in FIGS.
When the cassette 2 is not inserted or is being inserted, the lock projection 51 is locked by the lock mechanism 53 as shown in FIG.
The pin 54, which is a sliding protrusion provided on the cassette housing 3, is lifted by the horizontal portion 24a.

Here, the structure of the lock mechanism 53, the cassette housing 3, the eject plate 24, the return spring 45
The operation related to the above will be described with reference to FIGS. 10 to 16. The lock mechanism 53 has an inverted L-shape.

Then, the straight portion 5 on one side of the inverted L-shape
3d is mounted on the surface of the chassis 8 with a stepped screw 53h via a lock spring 53i.

The stepped screw 53h has a large diameter portion, a medium diameter portion, and a small diameter portion, and the lock spring 53i has a stepped screw 53h.
And is compressed and held between the lower surface of the large-diameter portion of the stepped screw 53h and the upper surface of the lock mechanism linear portion 53d.

The small diameter portion of the stepped screw 53h is a screw, and is screwed into the chassis 8.

The screw stops when the lower surface of the middle diameter portion contacts the upper surface of the chassis 8.

A hole larger than the middle diameter portion of the stepped screw 53h is provided in the straight portion 53d of the lock mechanism 53, and the middle diameter portion passes through the hole.

A step 5 is provided at the end of the lock mechanism linear portion 53d.
3e is formed, and the height of the step 53e is larger than the thickness of the eject plate 24.

A diameter portion 53f extends from the step portion 53e, and a cut-and-raised portion 53g is provided at the tip thereof.

The lower end of the cut-and-raised portion 53g is attached to the chassis 8
The contact pressure is determined by the extension force of the lock spring 53i.

The other side of the lock mechanism 53 formed in an inverted L-shape includes a linear portion 53c, an inclined portion 53b, and a cassette contact portion 53a.

FIGS. 10 and 11 show a state before the cassette 2 is inserted into the cassette housing 3. FIG. 4 shows the state of the entire apparatus at that time.

At this time, since the lock projection 51 provided on the eject plate 24 is locked to the cut-and-raised portion 53g of the lock mechanism 53, the eject plate 24
Is biased toward the front panel 21 by the restoring force of the return spring 45, but cannot move in the biasing direction.

Insert the cassette 2 into the cassette housing 3,
The leading end of the cassette 2 is the cassette contact portion 5 of the lock mechanism 53.
When the user pushes the lock mechanism 3a, the lock mechanism 53
The intersection between the straight portion 53d and the straight portion 53c is a fulcrum and rotates clockwise. As described above, the rotation is smoothly performed by providing a hole sufficiently larger than the middle diameter portion of the stepped screw 53h in the linear portion 53d of the lock mechanism 53. However, since this rotation is performed against the extension force of the lock spring 53i, when the cassette 2 is inserted, the reaction force is felt.

When the insertion of the cassette 2 is continued and the clockwise rotation is further advanced, the lower surface of the locking mechanism cut-and-raised portion 53g rises above the upper surface of the lock projection 51 provided on the eject plate 24, and Since the lock between the lock projection 51 and the cut-and-raised portion 53g is released, the eject plate 24 moves toward the front panel 21 by the restoring force of the return spring 45. This state is shown in FIG.

As the eject plate 24 moves, the pins 54 on the side surfaces of the cassette housing 3 are disengaged from the horizontal portions 24a on the side surfaces of the eject plate 24, and are provided on the side surfaces of the chassis 8 along the upper inclined portions 52a of the inclined grooves 52. As a result, the cassette 2 falls vertically, and as a result, the cassette 2
Guide pin 5 for cassette positioning provided on chassis 8
5 is smoothly inserted.

[0061] the tip of the drop completed the cassette 2, since the locking mechanism 53 is provided an inclined portion 53b, not in contact with the locking mechanism linear portion 53c.

That is, just before the cassette 2 is dropped,
Immediately after that, since it is not affected by the extension force of the lock spring 53i, it can be dropped more vertically, and stable positioning can be realized. This state is shown in FIGS. FIG. 5 shows the state of the entire apparatus at that time.

Next, when ejecting the cassette 2, when the eject plate 24 is pushed against the restoring force of the return spring 45, the pin 54 on the side of the cassette housing 3 is pressed in the opposite direction. Guide hole 1 provided on the side of chassis 8
3, the cassette housing 3 is vertically moved away from the surface of the chassis 8.

At this time, the lock projection 51 provided on the eject plate 24 comes into contact with and presses the slope of the locking mechanism cut-and-raised portion 53g. Therefore, the lock mechanism 53 is configured such that the contact portion between the straight portion 53d and the straight portion 53c of the lock mechanism 53 serves as a fulcrum and the lock spring 53
It rotates clockwise against the extension force of i.

When the eject plate 24 is further pressed, the pin 54 on the side of the cassette housing 3 reaches the horizontal portion 24a on the side of the eject plate 24. The state of the lock mechanism 53 at this time is the same as that in the case of FIG.

Immediately after this, the lock projection 51 provided on the eject plate 24 is
g, and at the same time, the lock mechanism 53
rotates Ri counterclockwise by the stretching force of i, the and the locking protrusion 51 and the cut-and-lifted portions 53g is engaged again, the eject plate 2
4 is locked so as not to move in the biasing direction. At this time, the state of the lock mechanism 53 is as shown in FIGS. 10 and 11, and the state of the entire apparatus is as shown in FIG.

After that, even if the operation of pushing the eject plate 24 by the operator is finished, the pins 54 on the side of the cassette housing 3 are closed.
Is held on the horizontal portion 24a on the side of the eject plate 24.

The extension force of the lock spring 53i is:
Since the front end of the cassette 2 is pushed through the cassette contact portion 53a, the smooth discharge of the cassette 2 is assisted.

When the cassette 2 is not inserted into the magnetic disk drive having such a configuration, the state is as shown in FIG. 1 as described above.

The state of the return spring 45 at this time is a state C in which the maximum deflection is given from the no-load state A shown in FIG. The lock projection 51 is locked by a lock mechanism 53, and the horizontal portion 24 a of the eject plate 24 is
Is pushing up.

Next, when the cassette 2 is inserted into the cassette housing 3, the lock of the lock mechanism 53 is released by the cassette 2, so that the eject plate 24 slides toward the front panel 21 by the restoring force of the return spring 45. . At the same time, the inclined groove 52 of the eject plate 24 also moves in the direction of the arrow P in FIG. 1, so that the pin 54 is connected to the eject plate 24 as shown in FIG.
Is dropped from the horizontal portion 24a of the ejecting plate 24 and pressed down by the upper inclined portion 52a of the inclined groove 52 provided in the eject plate 24.

Further, the operation shown in FIGS. 4 and 5 will be described in detail below.

As described above, the pin 54 provided on the side surface of the cassette housing 3 is first supported on the horizontal portion 24 a of the eject plate 24.

When the lock mechanism 53 is released by inserting the cassette 2 into the cassette housing 3, the eject plate 24 slides toward the front panel 21 by the restoring force of the return spring 45.

As a result, the pin 54 on the side of the cassette housing 3 is disengaged from the horizontal portion 24a on the side of the eject plate 24, and the guide hole 13 provided on the side of the chassis 8 is formed along the upper inclined portion 52a of the inclined groove 52. As a result, the cassette 2 is smoothly inserted into the cassette positioning guide pins 55 provided on the chassis 8.

Even when the cassette 2 is completely seated on the chassis 8, the eject plate 24 is moved toward the front panel 21 by the restoring force of the return spring 45.
2 is in contact with the pin 54 and the pin 54
Then, a component force in the vertical R direction is applied, so that the cassette 2 can be stably mounted and seated on the chassis 8 via the cassette housing 3.

After such a series of operations, the magnetic disk 1 is pressed by the hub receiver 7.

The state in which the magnetic disk 1 is pressed against the hub receiver 7 is as shown in FIG.
It is in the state of B in FIG. 7 and is in a state where it is slightly deflected as compared to a state where it is not bent.

Conventionally, two tension springs have been used to slide the eject plate 24, but according to the configuration of the present embodiment described above, it is possible to use one wire spring.
Significant reduction in material cost and improvement in assemblability can be achieved.

When the cassette 2 is not inserted, the collet 15 attached to the distal end of the collet support 17 is lifted above the upper surface of the cassette housing 3 when the cassette 2 is not inserted. Since the cassette housing 3 falls, the hub 4 is
Press. Therefore, since the cassette housing 3 only needs to be as thick as the cassette 2 can be inserted inside, the thickness of the cassette housing 3 can be reduced, and the control board 56 disposed above the cassette housing 3 can be reduced. The height of the entire apparatus including the above can be reduced, and the size can be reduced.

The above operation is reliable, and the collet 15 enters the inside of the cassette housing 3, and the cassette 2
A very stable operation can be obtained without contact when inserting or ejecting.

Further, the load acting on the collet 15 of the leaf spring 16 is applied to the leaf spring hook 1 near the collet 15.
8, the pressing force applied to the collet 15 can be made constant since the spring constant of the leaf spring 16 can be reduced.

Incidentally, as shown in the illustrated embodiment, the upper inclined portion 52a of the inclined groove 52 provided on the side surface of the eject plate 24.
If a pin removal preventing tongue piece 52b for preventing a pin 54 provided on the side surface of the cassette housing 3 from coming off is provided in series with the horizontal portion 24a on the side surface of the eject plate 24, Even if the operator turns the chassis 8 over, the cassette housing 3 does not fall out of the eject plate 24 and is not damaged by dropping.
It is not necessary to prepare a specially separated part and to assemble it in order to prevent pulling out, thereby shortening the assembling work time and improving the material yield.

The illustrated embodiment is as described above, and the cassette housing 3 is moved through the pins 54 provided on the side surfaces thereof.
Since the cassette 2 is vertically dropped along the guide hole 13 on the side surface of the chassis 8, the cassette 2 is inserted smoothly when positioning the cassette positioning guide pins 55 provided on the chassis 8 with the cassette 2. Further, the return spring 4
5 attempts to move the eject plate 24 in the direction of the front panel 21, and applies a component force in the vertical R direction to the pin 54 on the side surface of the cassette housing 3 by the inclined groove 52 of the eject plate 24. The magnetic disk 1 can be mounted and the contact state between the magnetic disk 1 and the upper and lower magnetic heads 34 and 35 can be improved, and the reliability can be improved. When the apparatus is installed not only horizontally but also vertically Also, it can be stably mounted.

Even if disturbance vibration is applied in the loaded state of the cassette housing 3, the horizontal component force of the return spring 45 causes the upper inclined portion 52a of the inclined groove 52 provided in the eject plate 24 to move the cassette housing 3 3 for acting on so that is pressed against the side surface of the pin 54, it is possible to obtain an excellent seating against disturbance vibration.

That is, unlike the prior art described in the section of [Prior Art] earlier, the accumulated dimensional error of each part is absorbed without increasing the number of parts, and the time required for product production is reduced. Omitting it contributes to shortening the production time as a result, and even if errors occur in the dimensions of each part,
The cause of cassette seating instability can be reliably removed.

Further, during the period from the unloading state to the loading state of the cassette storage body 3, the cassette storage body 3 exhibits a time-dependent behavior as shown in FIG. , Reference numeral 2 denotes a cassette, 3 denotes a cassette housing, and 54 denotes a pin provided on a side surface of the cassette housing 3), and the cassette 2 is inserted into the cassette housing 3 as shown in FIG. However, even when pushing the inside of the chassis, the cassette housing 3 does not move in the lateral direction by a fixed distance, and therefore, a space in the chassis that does not hinder the movement of the cassette housing 3 is secured. There is no need to do so, and not only can the chassis be reduced in size, but also the need to move the cassette housing 3 in the lateral direction means that the mechanism can be simplified accordingly. It, and the contribute to miniaturization also apparatus in this respect.

The cassette 2 which can be attached and detached in this manner can be stably seated on the seating portion of the chassis 8, which will be described in more detail.

That is, the cassette housing 3 is
Is removably inserted and the cassette 2 is seated on the seating portion of the chassis 8 by the insertion of the cassette 2. The cassette housing 3 is provided on the chassis 8 such that the moving direction of the approach / separation movement of the cassette housing 3 for bringing the cassette 2 into and out of contact with the seating portion of the chassis 8 is orthogonal to the direction in which the cassette 2 is inserted and removed. The operation of moving the cassette housing 3 toward and away from the cassette housing 3 is such that a pin 54 serving as a sliding protrusion provided at a side end of the cassette housing 3 slides on the guide portion of the guide hole 13 provided in the chassis 8. It is done in.

The eject plate 24 provided on the chassis 8 allows the cassette housing 3 to move toward and away from the cassette 2 so that the cassette 2 can move forward and backward along the insertion / removal direction.

The reciprocating operation of the eject plate 24 is the reverse of the operation of inserting and removing the cassette 2. When the cassette 2 is inserted and seated on the seat, the eject plate 24 moves backward. When the ejecting plate 24 is moved forward so as to be pushed in, the cassette 2 is separated from the seating portion and returned to be pulled out.

This is mainly performed by the inclined groove 52 of the eject plate 24 and the return spring 45 of the push-back urging means. The inclined groove 52 extends from the near side to the forward side in the moving direction of the eject plate 24, and
The cassette 2 that is seated on the seating portion of the chassis 8 is inclined in the seating movement direction. In addition, the inclined groove 52 has a pair of inclined surfaces located at a front portion which is on the near side in the direction of movement of the eject plate 24 and a rear portion on the back side. A pin 54 as a sliding convex portion of the cassette housing 3 is slidably supported between the upper inclined portion 52a as the rear inclined surface and the lower inclined portion as the front inclined surface.

First, the cassette 2 is inserted into the cassette housing 3 where the cassette 2 is not inserted. When the cassette 3 is fully inserted, the lock of the lock mechanism 53 holding the eject plate 24 in the pushed state is released by the cassette 2, and the eject plate 24 is pushed back by the return spring 45 of the push-back urging means. Move backward. By the retreat movement of the eject plate 24,
The pin 54 as a sliding convex portion of the cassette housing 3 receives a downward pressing force at an upper inclined portion 52a which is a rear inclined surface of the eject plate 24. In this way, the pin 54 as the sliding protrusion is provided in the guide hole 13 provided in the chassis 8.
The cassette 2 is moved downward by being guided by the guide portion, and the cassette 2 is seated on the seat portion. Conversely, to remove the cassette 2, the user operates to push the eject plate 24.
When the eject plate 24 is moved forward and pushed in against the return spring 45 of the push-back urging means, the eject plate 24 is locked by the lock mechanism 53 and held in the pushed state. As a result of the pushing forward movement, the pin 54 as the sliding convex portion of the cassette housing 3 receives a returning component force which is pushed upward by a lower inclined portion which is a front inclined surface of the eject plate 24. It is. Thus, the pin 54 as the sliding convex portion is guided by the guide portion of the guide hole 13 provided in the chassis 8 and moves upward, and the cassette 2 is moved so as to be separated from the seat portion.

The cassette 2 is seated on the seating portion of the chassis 8 and detached from the seating portion by the reciprocating movement of the eject plate 24 as described above, but the seating on the seating portion is stable. It is designed to be performed.

[0095] That is, the eject plate 24 is operated backward, the cassette 2 is in preparative be the final seating state pressed against the seat portion of the chassis 8, the pin 54 of the sliding protrusion of the cassette housing body 3 is inclined grooves A configuration is provided such that the front side of the inclined groove 52 extends forward from the frontmost position located on the front side of the front side 52. That is, in the final seated state, the upper inclined portion 52a of the inclined groove 52 that applies a downward pressing force to the pin 54.
However, since it is configured such that it extends further obliquely downward and forward than the most abutting position of the pin 54, even if there are dimensional errors in the various components constituting the device, the inclined grooves 52 The pressing component force that presses the pin 54 of the sliding convex portion is obtained by the upper inclined portion 52a, and the stable seating state of the cassette 2 is maintained.

The present invention is not limited to the illustrated embodiment, and it goes without saying that design changes can be made as appropriate without departing from the spirit of the present invention.

[0097]

As described above, the present invention relates to a chassis having a bottom and both side walls provided on both sides of the bottom so as to extend in the front-rear direction, a magnetic head, a rotary drive mechanism, and an eject mechanism provided in the chassis. A cassette storage body in which a plate and a cassette which can be inserted and removed are stored, wherein the cassette storage body approaches the bottom of the chassis,
A cassette insertion / removal slot for a cassette to be inserted / removed is provided on the front side of the cassette housing so as to be vertically movable in the vertical direction of the chassis so as to be separated, and the eject plate is perpendicular to the vertical movement direction of the cassette housing. A magnetic disk provided in the cassette, the ejector plate and the cassette housing being connected so that the cassette housing moves up and down in conjunction with the longitudinal movement of the eject plate; A boss receiving portion with which the connecting boss portion is engaged / disengaged is provided in the rotation drive mechanism, and the engaging / disengaging of the connecting boss portion and the boss receiving portion is performed with the vertical movement of the cassette housing. In the disk drive device, the eject plate includes a substrate portion and both side plates extending in a front-rear direction in which both sides of the substrate portion are bent at right angles. A push button for external operation is provided on the front side of the board portion, so that the board portion of the eject plate is along the inner bottom surface of the bottom portion of the chassis, and both side plates are along the inner side surfaces of both side wall portions of the chassis, respectively. An eject plate is arranged in the chassis, and a front panel mounted to cover the front side of the chassis is provided at the front of the chassis, and the cassette is inserted into and removed from the front panel at a position facing the cassette insertion slot of the cassette storage body. And a push button hole for slidably fitting the push button for external operation so as to protrude from the front surface of the front panel. The left and right ends of the front panel are formed along both side walls of the chassis. A locking arm extending from the front side to the rear side is provided, a locking claw is provided at a tip of the locking arm, and an engagement portion with which the locking claw is engaged is provided on the both side walls. In the magnetic disk drive unit, wherein the door.

According to this configuration, the following advantages can be expected.

(1) Since the front panel has the engaging claws engaged with the engaging portions on both side walls, the front panel is attached to the front panel by using a driver or the like when performing maintenance and inspection of the magnetic disk drive. By removing the locking claws, the front panel can be easily removed from the chassis.

(2) At both left and right ends of the front panel, locking arms are provided extending from the front side to the rear side along both side walls of the chassis, and locking claws are provided at the tips of the locking arms. The front panel is pressed against the front of the chassis by positioning the front panel against the push button hole on the front panel so that the push button for the external operation faces the push button for external operation. The locking claws engage. In this way, the front panel is easily attached to the chassis.

(3) Since the locking claw is provided at the tip of the extended locking arm, the locking arm is more flexed when the locking claw engages with or disengages from the engaging portions of the side walls. No. Because of this, the front panel does not bend forcibly and it is difficult for the push button hole to be distorted, so that the external operation push button can be easily inserted into and removed from the push button hole when installing and removing the front panel. Will be

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a magnetic disk drive according to an embodiment of the present invention in a state where a cassette is not inserted.

FIG. 2 is a cross-sectional view of the magnetic disk drive device in a cassette inserted state according to one embodiment of the present invention.

FIG. 3 is a plan view of a magnetic disk drive according to an embodiment of the present invention.

FIG. 4 is a side view showing the non-seated state of the cassette according to the embodiment of the present invention.

FIG. 5 is a side view showing a seating state of the cassette according to the embodiment of the present invention.

FIG. 6 is an exploded perspective view showing a related configuration of a front panel according to one embodiment of the present invention.

FIG. 7 is an enlarged view of a return spring according to one embodiment of the present invention.

FIG. 8 is an exploded perspective view of the cassette housing body according to the embodiment of the present invention.

FIG. 9 is an explanatory view of an operation of the cassette storage body according to the embodiment of the present invention.

FIG. 10 is a plan view of a lock mechanism according to the embodiment of the present invention.

FIG. 11 is a sectional view of a lock mechanism according to the embodiment of the present invention.

FIG. 12 is a cross-sectional view showing one embodiment of the present invention and showing a state where a lock mechanism is released.

FIG. 13 shows one embodiment of the present invention, and is a plan view showing a state after a lock mechanism is released.

FIG. 14 shows one embodiment of the present invention, and is a cross-sectional view showing a state after a lock mechanism is released.

FIG. 15 is an enlarged plan view showing a state after an eject plate is disengaged from a lock mechanism according to one embodiment of the present invention.

FIG. 16 is an enlarged longitudinal sectional view showing a state after an eject plate is disengaged from a lock mechanism according to one embodiment of the present invention.

[Explanation of symbols]

Reference numeral 8: chassis, 21: front panel, 22: cassette slot, 24-1: push button hole, 24-2: external operation push button, 30: both side walls, 32-1: locking arm, 32-2
... locking claw.

Claims (1)

(57) [Claims] 1. A chassis having a bottom and both side walls provided on both sides of the bottom so as to extend in the front-rear direction, a magnetic head, a rotation drive mechanism, an eject plate, and a cassette which can be inserted and removed from the chassis. A cassette storage body is provided, and the cassette storage body is provided to be vertically movable in the vertical direction of the chassis so as to approach or separate from the bottom of the chassis, and a cassette insertion / removal port of a cassette to be inserted / removed is provided on the front side of the cassette storage body. The eject plate is provided so as to be movable back and forth in the front-rear direction of the chassis so as to be orthogonal to the vertical movement direction of the cassette housing, and the cassette housing is vertically moved in conjunction with the front-back movement of the eject plate. The eject plate and the cassette housing are connected to each other, and the magnetic A boss receiving portion for engaging and disengaging a connecting boss portion of a disk is provided in the rotation drive mechanism, and the engaging and disengaging of the connecting boss portion and the boss receiving portion are performed with the vertical movement of the cassette housing. In the magnetic disk drive device, the eject plate is provided with a substrate portion and both side plates extending in the front-rear direction obtained by bending both sides of the substrate portion at right angles, and a push button for external operation is provided on the front side of the substrate portion, An eject plate is arranged in the chassis such that the board portion is on the inner bottom surface of the bottom portion of the chassis, and both side plates are respectively adjacent to the inner surfaces of both side wall portions of the chassis, and are mounted so as to cover the front side of the chassis. provided panel before being to the front of the chassis, the cassette loading and unloading opening for loading and unloading the cassette at a position facing the cassette insertion and removal opening of the cassette housing body in the front panel A push button hole is formed to be slidably fitted so that a push button for external operation protrudes from the front surface of the front panel, and is provided on both left and right ends of the front panel from the front side to the rear side along both side walls of the chassis. A magnetic disk drive, comprising: a locking arm extending toward the locking arm; a locking claw provided at a tip of the locking arm; and an engagement portion with which the locking claw is engaged on the both side walls. apparatus.