JP2702472B2 - Magnetic disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a magnetic disk drive.
Related to the equipment, especially for cassettes with built-in magnetic disks.
Magnetic disk with fixed mounting and stable seating
It relates to a driving device. [0002] 2. Description of the Related Art In general, a magnetic disk drive has a
A magnetic head is provided at the tip of the ridge, and its carriage and
Stepping motor connected by means such as steel belt
The carriage moves parallel to the surface of the magnetic disk
The magnetic head is positioned on the specified track on the magnetic disk.
The configuration to be determined is described in, for example,
It is well-known from Japanese Patent No. 3911. However, like 3 inches or 3.5 inches
In addition, the cassette has a hard case
There have been various problems. [0004] The disadvantages must be outlined in the prior art.
This will be described with reference to FIG. In FIG. 9, reference numeral 2 denotes a built-in magnetic disk.
Cassette, 3 is a cassette housing, 8 is a chassis, 24
Is mounted on the chassis 8 and has a cassette insertion port (not shown).
Eject) to eject cassette 2 outward
Plate, 30 is a chassis side plate, and 51 is a part of the eject plate 24.
The lock projection 53 is attached to the chassis 8 and the ejector
Lock mechanism that engages with and disengages from the lock projection of the plate 24;
4 is a pin provided on the side of the cassette housing 3, and 57 is a side plate.
30 is a horizontal portion, 58 is a side plate 3 continuous with the horizontal portion 57.
0 L-shaped guide groove, 59 is the cassette housing 3 and the side plate 30
It is a tension spring connecting between them. That is, in the above-described conventional configuration, the configuration shown in FIG.
Insert the cassette 2 into the cassette housing 3
When the inside of the chassis 8 is pushed in, the cassette
The pin 54 provided on the surface of the side plate
30 slides horizontally in the horizontal direction,
Along the L-shaped guide groove 58. At this time, the component force Q of the tension spring 59 is L-shaped.
The pin 54 joins the guide groove 58 and the pin 54 begins to fall vertically.
While the spring tension is great, the cassette 2 is
The tension of the tension spring has become smaller just before sitting on the floor
At this point, the pin 54 falls particularly under the influence of the component force in the Q direction.
Without getting caught in the middle of the L-shaped guide groove 58
There was a drawback that it was. In particular, install the device vertically
If this is done, there is a drawback that this kind of
Was. In the conventional example shown in FIG.
Disturbance vibration is applied in the loaded state of the packet storage body 3
The cassette 2 floats from the seating surface,
There was a disadvantage that the seat could not be guaranteed. Further, in the conventional example shown in FIG.
Set storage unit 3 goes from unloaded state to loaded state
In the meantime, this cassette housing 3 is
(See symbols in FIG. 11).
No. 2 is a cassette, 3 is a cassette housing, 54 is a cassette
1 shows a pin provided on a side surface of the housing 3), FIG.
1 (a), the cassette 2 is inserted into the cassette housing 3
Into the chassis and push it into the chassis.
The container 3 moves in the horizontal direction by a certain distance.
Spaces that do not hinder movement of the set storage unit 3
The chassis must be large enough
Become By the way, the cassette of the magnetic disk drive is
The technology relating to insertion and ejection of
No. 1 is also described in the publication
Object plate in parallel at different heights.
A pair of extending parallel portions, and connecting these parallel portions to each other.
A guide hole consisting of an inclined portion passing through is formed.
Insert the pin on the cassette housing side into the guide hole.
According to this eject plate, the cassette loader
After pressing, the pin is pressed by the lower horizontal part following the inclined part.
To prevent poor chucking even if the cassette is shaken up and down.
Can be stopped. [0011] Then, the above-mentioned Japanese Utility Model Laid-Open No. 58-26771 discloses
According to the technique shown, cassette loading
Before reaching the predetermined position.
At the two corners, press the engagement projection of the leaf spring
It is sexually pressed and engaged. However, according to this, the leaf spring member and its
It requires mounting members and increases the number of parts.
Requires a lot of labor and time to attach the above members.
I do. On the other hand, as described above, the heights are different from each other.
A pair of parallel parts extending in parallel at the position,
Parallel parts are guided by the inclined part communicating with each other
A hole is formed in the guide hole.
No. 58-26771.
An ejector having a structure not particularly provided with a leaf spring member.
An eject board has also been proposed, and according to this eject board,
After cassette loading, the pins are
As in No. 1, the lower horizontal part following the inclined part is pressed.
To prevent poor chucking.
If there is a gap between the pin and the lower horizontal part following the inclined part
If there is, press the top of the pin with the top of the horizontal part.
Cause the cassette position to become unstable.
Instability of the set position may cause damage to the built-in magnetic disk.
As a result, the recording and reproduction cannot be reliably performed. [0014] From the above, conventionally, in product assembly
Strictly to minimize the cumulative dimensional error of each part in
Incorporation of each part is done to allow for dimensional control,
Incorporation of each part in this way of strict dimension control
This is based on the technology disclosed in Japanese Utility Model Application Laid-open No. Sho 58-26771.
In a different sense, this also requires a lot of effort and time
I need. [0015] SUMMARY OF THE INVENTION The present invention relates to
Eliminates the drawbacks of the conventional technology, and of course,
In addition, the accumulation of each part without adopting a complicated structure
Absorbs dimensional errors and saves time for product production
And contributes to shortening the production time, and the dimensions of each part
Even if there is an error in the
Eliminates factors and ensures stable cassette seating at all times
An improved magnetic disk drive that can sometimes be achieved
Its purpose is to provide a moving device. [0016] SUMMARY OF THE INVENTION The present invention is directed to a bottom and the bottom.
And both side wall portions provided on both sides of the
And a drive for rotating a magnetic disk
Device and read to write to and read from magnetic disk
Writing means and magnetic diskToBuilt-in flat cassette
Is removably inserted into the bottom of the chassis.
Move toward, away from, and away from
A cassette housing that is provided to be movable toward and away from the chassis;
Make sure that this cassette storage body approaches the bottom of the chassis.
The cassette inserted in the cassette
A seating section provided on the bottom of the chassis so that the
Perpendicular to the moving direction of the cassette housing,
Move forward / backward along the side wall in the front-back direction
Eject provided on the chassis so as to be movable forward and backward
A plate, provided on the eject plate, and an eject plate
Of the chassis from the front to the rear
An inclined groove extending at an angle to approach the bottom;
On the side of the storage case and slides along the inclined groove
The sliding convex portion guided freely and the pushing of the traveling movement
To push the eject board into the pushed state
Hold the cassette and insert the cassette into the cassette
A lock mechanism for releasing the holding, and the lock mechanism
The eject mechanism that was pushed in by releasing the locking mechanism
With push-back that pushes back the object board to move it backward
Biasing means, and an eject plate is provided by the push-back biasing means.
Back to move the cassette into the seat of the chassis.
When seating, the cassette housing is
The sliding convex in the inclined groove so as to move toward the bottom
Part, and move the eject plate forward to move
When removing the cassette from the seat of the chassis,
The direction in which the cassette housing is separated from the bottom of the chassis
The sliding convex portion with the inclined groove so as to move toward
When pressing, guide the sliding convex part slidably
And along the moving direction of the cassette housing.
Are provided on both side walls of the chassis,
The read / write unit faces a lower surface of the magnetic disk
The lower magnetic head is arranged so that it faces the upper surface
An upper magnetic head arranged in the seated state
At the upper and lower surfaces of the magnetic disk with upper and lower magnetic heads
Sandwich the magnetic disk and attach it to the seat of the chassis.
When the set is seated, push back
By the pushing back force of the means,SaidInclined grooveSlopesoSaidSliding
Moving convexConfiguration that presses downIt is characterized by
You. [0017] DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic disk drive according to the present invention
An embodiment of the device will be described with reference to the drawings. FIG. 1 shows a magnetic disk according to an embodiment of the present invention.
FIG. 2 is a sectional view of the disk drive device when the cassette is not inserted, and FIG.
Sectional view at the time of cassette insertion mounting, FIG. 3 is a plan view, FIG.
5 is an enlarged detailed view of a main part, and FIG. 6 is an exploded oblique view near the front panel.
FIG. 7 is a detailed explanatory view of the return spring, and FIG.
FIG. 10 is an exploded perspective view showing the vicinity of the
Figure showing the behavior of the cassette storage unit as a change over time
is there. In the figure, 1 is a magnetic disk and 2 is a magnetic disk.
Flat-plate cassette with built-in disk
A guide groove for guiding the guide body 6 of the hub receiver 7 is shown in FIG.
5 is a hub. Reference numeral 8 denotes a chassis in which each part of the device is
9 is a boss formed integrally with the chassis 8
The inside of the cassette 2 is provided on the inner diameter side of the boss 9.
Drive 10 for rotating the magnetic disk 1
Is mounted. The shaft 12 directly connected to the drive unit 10 has a magnetic
Hub receiver for mounting a hub 4 provided at the center of the air disk 1
7 are provided. The magnetic disk 1 is fixed to the hub 4
It is mounted on the tip of the shaft 12 and is centered.
It is configured as follows. Cassette housing 3 in 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) (hereinafter, referred to as a guide hole)
The cassette storage unit 3 is configured to be able to move down.
A bent projection 14 is formed at the front center of the upper surface of the
15 to the central hub 4 of the magnetic disk 1
A leaf spring 16 for applying a weight makes the bent projection 14
And fixed to the cassette housing 3 by caulking or welding.
Is being worn. Further, as described in detail in FIG.
A collet support 17 is provided on the upper part of the spring 16,
A collet 15 is attached to one end of the let support 17.
At the same time, the leaf spring hook 18 provided in the vicinity
The end 19 of the leaf spring 16 is hooked, and the cassette housing 3 is
Slit 20 provided at a position corresponding to bent projection 14
Is inserted into the bent projection 14. Therefore, the collet 15 of the leaf spring 16
The applied load is the leaf spring hooked by the collet 15.
Acting on the portion 18, the spring constant of the leaf spring 16 is reduced.
It is possible to make the pressing force applied to the collet 15 constant.
it can. The other end of the collet support 17 is in front of the device.
Cassette insertion slot 22 on the back side of front panel 21 attached to the surface
The lower part of the support part 23 provided on the upper part of the
Of the support portion 23 and the slit 20 inserted in the bent projection 14
More supported. In such a configuration, FIG.
When the cassette 2 is not inserted, as shown in FIG.
The container 3 is lifted by the eject plate 24.
So that one end of the collet support 17 is
The collet support 17 contacts the support portion 23 of the panel 21 and
The collet 15 attached to the other end uses the slit 20 as a fulcrum.
And the spring force of the leaf spring 16 attached to the cassette housing 3
Lifted against When this lifted, the collet
The lower surface of the tray 15 is raised above the upper surface of the cassette housing 3.
It is set so that it can be done. Therefore, the height direction of the cassette housing 3
The dimensions should be the same as the thickness of the cassette 2 inside
Contact the collet 15 when inserting the cassette 2
There is no. Next, as shown in FIG.
When inserted into the set storage body 3, as shown in FIG.
The lock mechanism 53 of the eject plate 24 (the lock mechanism
(The details of the structure 53 will be described later.)
Then, the cassette container 3 falls down as follows.
When the hub 4 of the magnetic disk 1 is mounted on the hub receiver 7,
At the same time, the front end of the collet support 17 supports the front panel 21.
Lifts the slit 20 to the fulcrum
The collet 15 that has been set is moved by the leaf spring 16 to the hub 4.
Side of the magnetic disk 1 and the hub 4 of the magnetic disk 1
Press In addition, about the operation | movement of these FIGS. 4 and 5,
Will be described later in detail. Further, as shown in detail in FIG.
1 is provided with a cassette insertion slot 22 when the apparatus is not in use.
A mounting hole 26 for mounting a door 25 for closing is provided.
The door 25 has a door spring for giving elasticity.
27 through an insertion shaft 28 integrally formed with the door 25.
Then, while the door 25 is elastically deformed in the longitudinal direction, the mounting holes 2
6 is rotatably supported. At 29, the door spring 27 does not come off.
It is a spring hook part for removing. Further, it is formed integrally with the chassis 8.
Notches 31 of both wall portions 30 (note that FIGS.
The notch 31 is not shown in the figure).
The holding portion 32 for holding the front panel 21 is
Are formed integrally on both sides. According to such a front panel configuration, the door 2
5 and door spring 27
As compared to the conventional door structure, the number of parts
Costly configuration. Also, with one door 25
Simple design because the cassette slot 22 is closed
It is. On the other hand, in FIGS.
And a magnetic disk at the end of the carriage 33.
Bottom magnet for writing data to and reading data from the lower surface of 1
A head 34 is provided. On the upper part, the magnetic disk 1
An upper magnet for writing and reading data on the upper surface
Air head 35 is provided at the tip of the head arm 36
I have. Usually, the lower magnetic head 34 and the upper magnetic head
The center of the read / write core with the C35 is 100TPi
(Track density of 100 tracks per inch)
It is shifted by the amount of the rack. 37 indicates that the upper magnetic head 35 is
Head to give an appropriate load when in close contact with
This is a door arm spring. With the carriage 33 having the above-described structure,
The head arm 36 is a pool of a stepping motor 38.
Magnetic belt via steel belt 40 attached to
Move along the concentric recording band formed on the disc 1.
You. And 41 is steel to the pulley 39
The mounting screw for the belt 40, and the tip of the mounting screw 41
Are the outermost track and the innermost track recorded on the magnetic disk 1.
The carriage 33 moves from the location
So that the stopper 42 is in contact with the rack
I have to. This is the outermost track during normal use.
Detected by the detection sensor 43, but the outermost
Move more than two tracks from the circumference toward the outer circumference
And the outermost track due to the characteristics of the stepping motor 38.
This is because there is a possibility that the user may not be able to move.
In addition, the stepping motor 38 may be
When running, to prevent cutting of the styrene belt 40
belongs to. Further, 41 is formed integrally with the chassis 8.
Locking projection, which penetrates the eject plate 24.
You. The eject plate 24 has a locking projection
Push-back biasing means comprising a return spring 45 on both sides of
(Hereinafter, referred to as a return spring)
46 are provided. As shown in detail in FIG.
Has a curvature substantially corresponding to the diameter of the locking projection 44.
To give an arbitrary curvature 47 on both sides,
The central curvature portion 48 is connected smoothly. Further, the curvature 47
An arm 49 of an appropriate length is extended outward. The return spring 45 having such a shape is elastic.
The return spring 45 is made of a certain wire or the like.
Attach (or lock) the center curvature portion 48 to the locking protrusion 44
Things. The upper part is integrated with the chassis 8
It is held down by the formed retaining portion 50. Then arm 4
9 is locked to a bent portion 46 provided on the eject plate 24.
The ejecting plate 2
4 is to be urged to push back to the front panel 21 side
become. The eject plate 24 is shown in FIGS.
As described above, the lock protrusion 51, the horizontal portion 24a, the inclined groove 5
2 when the cassette 2 is not inserted, or
In the case of being inserted, as shown in FIG.
The eject plate 24 is locked by the lock mechanism 53.
At the horizontal protrusion 24a provided on the cassette housing 3
A pin 54 is being lifted. It will be described in detail later.
Thus, the inclined groove 52 has a leading edge inclined surface 52c and a trailing edge inclined surface 52c.
52a. Here, the structure of the lock mechanism 53 and
And cassette housing 3, eject plate 24, return spring 45
Will be described with reference to FIGS. 12 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 provided on the surface of the chassis 8 via a lock spring 53i.
And is attached by a stepped screw 53h. The stepped screw 53h has a large diameter portion, a medium diameter portion, a small diameter portion, and a small diameter portion.
The lock spring 53i has a stepped screw 53h.
The large diameter part of the stepped screw 53h guided by the middle diameter part
It is compressed and held between the lower surface and the upper surface of the lock mechanism linear portion 53d.
ing. The small diameter portion of the stepped screw 53h is a screw.
And is screwed into the chassis 8. Then, the screw stops under the middle diameter part.
This is performed by bringing the surface into contact with the upper surface of the chassis 8. The linear portion 53d of the lock mechanism 53 has a step.
A hole larger than the middle diameter of the screw 53h is provided.
The middle diameter portion penetrates 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 portion 53e is
The thickness is larger than the thickness of the plate 24. From the step portion 53e, a diameter portion 53f extends.
At the end, a cut-and-raised portion 53g is provided.
Have been. The lower end of the cut-and-raised portion 53g is attached to the chassis 8
Surface, and the contact pressure is
It is determined by the extension force of the spring 53i. The lock mechanism 53 formed in an inverted L-shape
The other side has a straight portion 53c, an inclined portion 53b, and a case.
It comprises a socket contact portion 53a. Insert the cassette 2 into the cassette housing 3
The previous state is shown in FIGS. Also, at that time
FIG. 4 shows the state of the entire apparatus. Then, at this time, the
The locking projection 51 is
Since it is locked to the cut-and-raised portion 53g, the eject plate 24
Is attached to the front panel 21 by the restoring force of the return spring 45.
It is biased 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.
To rotate clockwise. And the rotation is as described above.
In particular, there is no step with the linear portion 53d of the lock mechanism 53.
To provide a hole that is sufficiently larger than the middle diameter
It will be done more smoothly. However, this rotation is caused by the lock spring
53i, the cassette 2 is inserted.
When you enter, you will feel the reaction. The insertion of the cassette 2 is continued, and
When the rotation in the direction further proceeds, the locking mechanism cut-and-raised portion 53g
The lower surface is a lock projection provided on the eject plate 24.
51, the lock projection 51 and the cut-and-raised portion
Since the lock with the 53g is released, the eject plate 24 is restored.
It moves to the front panel 21 side by the restoring force of the return spring 45
Will be. This state is shown in FIG. The movement of the eject plate 24 causes the cassette
The pin 54 on the side of the housing 3 is connected to the water on the side of the eject plate 24.
Being displaced from the flat portion 24a, on the trailing edge inclined surface 52a of the inclined groove 52
Along the guide hole 13 provided on the side of the chassis 8
And fall down in the vertical direction.
The positioning holes 2a are provided in the cassette positioning holes provided in the chassis 8.
And smoothly inserted into the guide pins 55. Note that a cassette is inserted into the positioning hole 2a of the cassette 2.
The cassette 2 is inserted into the cassette 2
Is positioned and the lower surface of the cassette 2 is
Received at the step 55a formed at the base of the doping pin 55
Can be The cassette 2 is received by the step 55a.
Since the cassette 2 comes to be seated on the chassis 8,
The step portion 55a is a seating portion on which the cassette 2 is seated.
You. The leading end of the dropped cassette 2 is locked.
Since the inclined portion 53b is provided in the mechanism 53, the locking mechanism is provided.
There is no contact with the straight portion 53c. That is, just before the cassette 2 is dropped,
Immediately after that, it is affected by the extension force of the lock spring 53i.
Because it can be dropped more vertically
Thus, stable positioning can be realized. this
The state is shown in FIGS. Also, all devices at that time
The state of the body is shown in FIG. Next, when ejecting the cassette 2,
Eject plate 24 against the restoring force of return spring 45
And the pin 54 on the side of the cassette housing 3 is
Guide hole 1 which is pressed in the direction
3 to guide the cassette housing 3 onto the chassis 8
Vertical movement away from. At this time, the
The lock projection 51 is located at an angle of the lock mechanism cut-and-raised portion 53g.
This is pressed against the surface portion. Therefore, lock machine
The structure 53 includes a straight portion 53d and a straight portion 53d of the lock mechanism 53.
The contact portion with 53c serves as a fulcrum and the lock spring 53
It rotates clockwise against the extension force of i. Then, the eject plate 24 is further pressed.
The pin 54 on the side of the cassette housing 3 is
It reaches the horizontal portion 24a on the 24 side. At this time,
The state of the locking mechanism 53 is the same as that in FIG.
You. Immediately after this, the
The lock projection 51 is provided with the cut-and-raised portion 53 of the lock mechanism 53.
g, and at the same time, the lock mechanism 53
i is rotated counterclockwise by the extension force of i
The projection 51 and the cut-and-raised portion 53g are engaged, and the ejection 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.
FIG. 4 shows the state of the entire apparatus. Thereafter, the operator presses the eject plate 24.
The operation of the pin 54 on the side of the cassette housing 3
Is held on the horizontal portion 24a on the side of the eject plate 24.
Will be. The extension force of the lock spring 53i is:
Pushes the front end of the cassette 2 via the cassette contact portion 53a
Therefore, smooth discharge of the cassette 2 is assisted.
You. A cassette is mounted on a magnetic disk drive having such a configuration.
2 is not inserted, the state shown in FIG.
ing. The state of the return spring 45 at this time is shown in FIG.
State of C given maximum deflection from no-load state A shown
It has become. The lock projection 51 is
The horizontal portion 24a of the eject plate 24 is
4 is up. Next, the cassette 2 is inserted into the cassette housing 3.
Then, the lock mechanism 53 is locked by the cassette 2.
The ejection plate 24 is reset by the return spring 45 to release
It slides to the front panel 21 side by the original force. At the same time, iji
The inclined groove 52 of the object plate 24 also moves in the direction of arrow P in FIG.
Therefore, as shown in FIG.
Fall off the horizontal portion 24a of the
Pushing downward by the trailing edge inclined surface 52a
It has a configuration that can even be attached. Further, the operation shown in FIGS.
Will be described in detail below. As described above, the side of the cassette housing 3
First, the provided pin 54 is positioned horizontally on the eject plate 24.
It is supported on the part 24a. Insert the cassette 2 into the cassette housing 3
As a result, when the lock mechanism 53 comes off, the ejection plate
24 is the front panel 21 side due to the restoring force of the return spring 45
To slide. Thus, the pins on the side of the cassette housing 3
54 is outside the horizontal portion 24a on the side of the eject plate 24.
And along the trailing edge inclined surface 52a of the inclined groove 52,
The guide hole 13 provided on the side of the machine 8 falls vertically.
As a result, the cassette 2 is set on the chassis 8.
Inserts smoothly into guide pins 55 for positioning the gage cassette
Is done. The cassette 2 is completely seated on the chassis 8
However, the eject plate 24 is not affected by the restoring force of the return spring 45.
To move to the front panel 21 side.
2, the trailing edge inclined surface 52a contacts the pin 54, and the pin 5
Since a component force in the vertical R direction shown in FIG.
The cassette 2 is stabilized on the chassis 8 via the storage body 3
Can be mounted and seated. After such a series of operations, the magnetic disk
The tool 1 is pressed by the hub receiver 7. The magnetic disk 1 is pressed by the hub receiver 7.
The returned state is as shown in FIG.
It is in the state of B of 7 and it is slightly deflected than when it is not bent.
In a state where Conventionally, the above-described eject plate 24
Two tension springs were used for sliding.
According to the configuration of the embodiment, it becomes possible with one wire spring.
Significant reduction in material cost and improvement in assemblability can be achieved. Then, it is attached to the tip of the collet support 17.
The collet 15 that has been cut has the slit 20 as a fulcrum,
When the cassette 2 is not inserted, from the upper surface of the cassette housing 3
Is also lifted, and when the cassette 2 is mounted, the cassette
Since the container 3 falls, the hub 4 is pushed by the leaf spring 16.
Press. Therefore, the height dimension of the cassette housing 3
Need only be thick enough to insert the cassette 2 inside.
Therefore, the dimension in the thickness direction of the cassette housing 3 can be reduced,
The whole device including the control board 56 arranged on the top of the device
Height can be reduced and downsizing can be achieved.
You. The above operation is reliable, and the collet
15 enters the inside of the cassette housing 3, and the cassette 2
It does not come into contact when inserting or discharging
The specified operation can be obtained. Further, it acts on the collet 15 of the leaf spring 16.
The load to be applied is the leaf spring hook 1 near the collet 15.
8 to reduce the spring constant of the leaf spring 16
Therefore, it is possible to make the pressing force applied to the collet 15 constant.
Wear. As shown in the embodiment shown in FIG.
Trailing edge inclined surface 52a of the inclined groove 52 provided on the side surface of the plate 24.
The horizontal portion 24a on the side of the eject plate 24
And the pin 54 provided on the side surface of the cassette housing 3 comes out.
A tongue piece 52b for preventing the pin from being pulled out
For example, during product assembly, the operator turns the chassis 8 over.
The cassette housing 3 comes out of the eject plate 24
The cassette storage unit 3
Prepare specially assembled parts to prevent pull-out and assemble them
There is no need to shorten assembly work time and material yield.
Can be improved. The illustrated embodiment is as described above.
The container 3 is provided via a pin 54 provided on a side surface thereof.
One that falls vertically along the guide hole 13 on the side of the chassis 8
Since it is of the type, the cassette position provided on the chassis 8
Positioning of guide pin 55 for positioning and cassette 2
At this time, the cassette 2 is inserted smoothly, and the return spring 4
5 moves the eject plate 24 in the direction of the front panel 21.
And the inclined groove 52 of the eject plate 24
A vertical R component force is applied to the pin 54 on the side of the
Therefore, the cassette 2 can be stably mounted,
Contact between the magnetic disk 1 and the upper and lower magnetic heads 34 and 35
Is also good and reliable.
Not only horizontally but also vertically
Can be stably mounted. Further, when the cassette housing 3 is in the loaded state,
Even if disturbance vibration is applied, the horizontal component force of the return spring 45
Is behind the inclined groove 52 provided on the eject plate 24.
The edge inclined surface 52a is connected to the pin 54 on the side of the cassette housing 3.
Acts to press, so it is excellent against disturbance vibration
Seating can be obtained. That is, as described in the section of [Prior Art] earlier.
As in the prior art, especially to increase the number of parts.
Product production without absorbing the dimensional errors of each part
Contributes to shortening of production time as a result
Even if there is an error in the dimensions of each part,
The cause of cassette seating instability can be reliably removed.
You. Further, the cassette housing 3 is unloaded.
This cassette storage
The body 3 shows a time-dependent behavior as shown in FIG.
(Note that in FIG. 10, reference numeral 2 denotes a cassette, and 3 denotes a cassette.
The housing 54 is provided with a pin provided on the side of the cassette housing 3.
10), and as shown in FIG.
2 into cassette housing 3 and push in the chassis
Even when the cassette is going out, the cassette housing 3
9. As in the conventional example shown in FIG.
The cassette housing 3 is not moved.
It is necessary to secure a space in the chassis that does not
There is no need to make the chassis smaller.
As well as moving the cassette housing 3 sideways.
The elimination of this means that the mechanism can be simplified.
This also contributes to downsizing of the device.
You. As described above, the power which can be attached and detached
Set 2 should be stably seated on the seat of chassis 8
Although it is possible to do it,
The present invention will now be described. That is, the cassette housing 3 is
Can be inserted and removed freely, and the cassette 2 can be inserted.
To the seat provided on the bottom side of the chassis 8
Set 2 is seated. Cassette 2 in chassis 8
How the cassette housing 3 moves toward and away from the seat
Direction (approaching or moving toward the bottom of the chassis
Operating direction) is perpendicular to the direction of inserting and removing the cassette 2.
The cassette housing 3 is provided on the chassis 8. Mosquito
The operation of moving the set storage unit 3 toward and away from the cassette storage unit 3
A pin 54 as a sliding projection provided at the side end
Sliding on the guide portion of the guide hole 13 provided in the housing 8
It is done as follows. The cassette 2 moves in the insertion / removal direction.
It is provided on the chassis 8 so that it can perform a retreating operation.
The eject plate 24 moves the cassette housing 3 toward and away from the main body.
Is performed. The reciprocating movement of the eject plate 24 is set in the cassette.
The operation is the reverse of the operation of inserting and removing the device 2. Mosquito
When set 2 is inserted and seated on the seat,
The plate 24 moves backward. Push in eject plate 24
The cassette 2 moves from the seating position
It is returned to be separated and pulled out. This is mainly due to the inclination of the eject plate 24.
This is performed by the groove 52 and the return spring 45 of the push-back biasing means.
Because The inclined groove 52 is located on the front side of the eject plate 24.
From the rear toward the bottom of the chassis 8
It extends at an angle. Moreover, this inclined groove 52
Of the inclined groove 52 from the front side to the rear side of the eject plate 24.
A leading edge inclined surface 52c serving as a leading edge and a trailing edge inclined surface 5 serving as a trailing edge
2a. The trailing edge inclined surface 52a and the leading edge inclined surface 52
a pin 5 as a sliding convex part of the cassette housing 3
4 is slidably supported. First, a cassette in which the cassette 2 is not inserted.
Insert the cassette 2 into the set storage 3. Case
When it is inserted all the way to the bottom of the
The lock of the lock mechanism 53 holding the eject plate 24
Eject plate 24 is pushed back by cassette 2
So that it is pushed back by the return spring 45 of the biasing means.
Retreat. By the retreat movement of the eject plate 24,
The pin 54 as a sliding convex part of the cassette housing 3 is ejected.
Pressing downward on the trailing edge inclined surface 52a of the cut plate 24
Receive component force. Thus, the pin 54 as the sliding protrusion is
Guided to the guide part of the guide hole 13 provided in the chassis 8
Is moved downward, and the cassette 2 is seated on the seating portion.
It is done. Conversely, eject the cassette 2
An operation is performed so as to push the contact plate 24. Push back biaser
Push the eject plate 24 back against the return spring 45 as a step.
Eject plate 24 when it is moved forward and pushed in
Is pressed by being locked by the lock mechanism 53.
It is kept in a state. For such push-in movement
Therefore, the pin 54 as the sliding convex portion of the cassette housing 3 is
Push up on the leading edge inclined surface 52c of the eject plate 24
It is pushed back and receives a component. In this way,
A pin 54 as a moving projection is provided on the chassis 8.
It is guided by the guide portion of the guide hole 13 and moves upward,
G2 is moved so as to separate from the seat.
You. Now, the cassette 2 is set on the seating portion of the chassis 8.
As described above, it is not possible to sit down or
This is due to the reciprocating movement of the eject plate 24.
It is designed so that the seating of the
You. That is,Trailing edge inclined surface 52a of inclined groove 52
The pin 54 which is the sliding convex part of the cassette housing 3 is moved downward.
By using a configuration to hold down,Eject plate 24
Moves backward, and the cassette 2 is pushed against the seating portion of the chassis 8.
Final seating state attachedInDevice
Even if there are dimensional errors of various parts to be formed,Push back biaser
When the push-back force of the return spring 45 acting as a step acts,
Trailing edge inclined surface 52a of inclined groove 52InPressing the button 54
DisciplineMinutePower is obtained and the stable seating state of the cassette 2
In the stable sitting state, the upper and lower magnetic
The upper and lower surfaces of the magnetic disk 1 are finely rocked by the pads 35 and 34.
It can be clamped without making it. The pins 54 on the side of the cassette housing 3
Is located along the trailing edge inclined surface 52a of the inclined groove 52.
The guide hole 13 provided on the side of the machine 8 falls vertically.
That is, the pin 54 on the side of the cassette housing 3
Is in line contact with the guide hole 13 provided on the side surface of the chassis 8.
As a result, the cassette 2 is provided on the chassis 8.
Inserted into the guide pin 55 for positioning the cassette.
It is. The present invention is limited only to the illustrated embodiment.
Without departing from the spirit of the invention.
Needless to say, the design can be changed as appropriate. [0098] As described above, according to the present invention, the bottom portion and the
Side walls provided on both sides of the bottom and extending in the front-back direction
For rotating a magnetic disk and a chassis having a
Write to and read from drive and magnetic disk
Read / write means and magnetic diskToBuilt-in flat case
The chassis is removably inserted and the bottom of the chassis
Approach, move away from, or move away from
Cassette housing that can be freely moved to and from the chassis
And the cassette housing approaches the bottom of the chassis.
The cassette inserted into the cassette
Seating part provided on the bottom of the chassis so that the set sits
And orthogonal to the moving direction of the cassette housing body, and
Advancing / retreating in the front-back direction along the side wall
Is provided on the chassis so as to be movable forward and backward.
And an eject plate provided on the eject plate,
The shears move from the front side to the rear side of the plate.
An inclined groove extending at an angle to approach the bottom of the plate;
Set on the side of the set storage unit and along the inclined groove
A sliding projection that is slidably guided;
The eject plate that has been pushed in.
The cassette and insert the cassette into the cassette
Lock mechanism to release the holding
When the lock mechanism is released, the
Push back to push back the eject plate
Biasing means; and
The cassette is moved backward and the cassette is
When seating the cassette, the cassette
The sliding groove is used to move toward the bottom of the
Press the moving convex part, and move the eject plate forward.
When removing the cassette from the seat of the chassis
Moves the cassette housing away from the bottom of the chassis.
The sliding protrusion is formed by the inclined groove so as to move in the direction
Press the sliding part so that the sliding convex part can slide freely.
Guide, and along the moving direction of the cassette housing
Guides formed on both sides of the chassis.
The read / write means faces the lower surface of the magnetic disk
Facing the lower magnetic head and upper surface
An upper magnetic head arranged to be
In the state above and below the magnetic disk with the upper and lower magnetic heads
The magnetic disk is sandwiched from the lower surface, and the seat of the chassis is
When the cassette is in a seated state, push it back
By the pushing back force of the urging means,SaidInclined grooveSlopesoPrevious
RecordSliding projectionConfiguration that presses downCharacterized by magnetism
In the disk drive. According to this configuration, the following advantages are expected.
it can. (1) Not only can the device be miniaturized, but also
Dimensional error of each part without adopting complicated structure
Absorb the differences and save time and effort in product production
Contributes to shortening of operation time, and errors in dimensions of each part
Cause the cassette seating instability,
Reliably removes and always achieves stable cut seating at the same time
An improved magnetic disk drive that can
Obtainable. (2) Specifically,Insert the cassette in the inclined part of the inclined groove.
The sliding convex part of the container is pressed down.
And byThe eject plate moves backward and the cassette shuts down.
The final seating state pressed against the seatThere
HahaThere are dimensional errors in the various parts that make up the device
Also,When the push-back force of the push-back biasing means is applied,
Inclined grooveSlopesoSaidPressing to press the sliding protrusionMinutePower
Is obtained, and a stable seating state of the cassette is maintained.
In a stable sitting state, the magnetic head
Hold the upper and lower surfaces of the disk
Can be. (3) Further, the sliding projection is slidably guided,
And is formed along the direction of movement of the cassette
By providing guides on both sides of the chassis,
The sliding protrusion on the side of the cassette housing
Drop the guide provided on the side of the chassis vertically.
That is, the sliding protrusion on the side of the cassette housing
Is only line contact with the guide provided on the side of the chassis.
As a result, the cassette moves to the position of the cassette
It is smoothly inserted into the guide pin for positioning. On the other hand, the front side of the cassette
Roller while holding the cassette
The cassette housing up and down while contacting the pins via
Something to move. However, according to this configuration, the front panel and the power
Since the contact with the front side of the set housing is surface contact, sliding resistance
The resistance is large, and in addition, the roller is
Contact with the pin via the
Force applied to the front and rear sides of the cassette housing during downward movement
Causes unbalance, and the cassette housing moves smoothly.
There are difficulties that cannot be made. On the other hand, according to the present invention, the cassette housing body side
The sliding projection on the surface is aligned with the guide on the side of the chassis.
Moves only by line contact, resulting in smooth cassette housing
Can be operated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a magnetic disk drive when a cassette is not inserted according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the magnetic disk drive according to the embodiment of the present invention, in which a cassette is inserted. FIG. 3 is a plan view of the magnetic disk drive according to the embodiment of the present invention when a cassette is not inserted. FIG. 4 is a side view mainly showing a cassette housing and an eject plate immediately before a cassette is seated according to the embodiment of the present invention. FIG. 5 is a side view mainly showing the cassette housing and the eject plate after the cassette is seated according to the embodiment of the present invention. FIG. 6 is an exploded view according to one embodiment of the present invention, wherein a front panel,
The eject plate and the chassis are mainly shown. FIG. 7 is a view illustrating an operation of a return spring according to the embodiment of the present invention. FIG. 8 is an exploded view according to one embodiment of the present invention, mainly showing a cassette housing and a collet. FIG. 9 is a partially enlarged view showing a related configuration of a cassette housing and an eject plate according to a conventional example. FIG. 10 is an explanatory view of an operation of the cassette storage body according to the embodiment of the present invention. FIG. 11 is an explanatory view of the operation of the cassette housing in the conventional example of FIG. 9; FIG. 12 is an enlarged plan view showing a lock mechanism and an eject plate locked by the lock mechanism according to one embodiment of the present invention. FIG. 13 is an enlarged vertical sectional view showing a lock mechanism and an eject plate locked by the lock mechanism according to one embodiment of the present invention. FIG. 14 is an enlarged vertical sectional view showing a state where an eject plate is removed from a lock mechanism in a cassette to be inserted according to the embodiment of the present invention. 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. DESCRIPTION OF SYMBOLS 1 ... magnetic disk, 2 ... cassette, 3 ... cassette housing, 8 ... chassis, 24 ... eject plate, 34 ... lower magnetic head, 35 ... upper magnetic head, 45 ... return spring (push-back biasing means) ), 52: inclined groove, 52a: trailing edge inclined surface.

Continuation of front page    (56) References JP-A-59-221884 (JP, A)                 JP-A-58-85966 (JP, A)                 Actual opening sho 59-125749 (JP, U)

Claims (1)

(57) [Claims] A chassis having a bottom portion and both side walls provided on both sides of the bottom portion and extending in the front-rear direction; a driving device for rotating and driving the magnetic disk; a read / write means for writing and reading on the magnetic disk; and a magnetic disk A cassette accommodating body into which a flat-plate-shaped cassette containing therein a cassette is detachably inserted, and which is provided to be movable toward and away from the chassis so as to approach, move away from and approach the bottom of the chassis; and A seating portion provided at the bottom of the chassis so that the cassette inserted into the cassette housing can be seated when the housing moves toward the bottom of the chassis; and a direction perpendicular to the moving direction of the cassette housing. And an ejector movably provided on the chassis so as to advance and retreat in the front-rear direction along the side wall. An inclined groove provided in the eject plate, and extending so as to approach the bottom of the chassis as it advances from the front side to the rear side of the eject plate; and A sliding convex portion slidably guided along the groove, and the pushing of the traveling movement holds the pushed eject plate in a pushed state, and inserts the cassette into the cassette housing, A lock mechanism for releasing the holding thereof; and a push-back biasing means for pushing back the ejected plate in the pushed-in state by the release of the lock mechanism so that the eject plate is moved backward. When the cassette is seated on the seat of the chassis by moving backward,
When pressing the sliding convex portion with the inclined groove so that the cassette housing body moves toward the bottom of the chassis, and conversely, moving the eject plate forward to separate the cassette from the seating portion of the chassis. Wherein the cassette housing body presses the sliding convex portion with the inclined groove so as to move in a direction away from the bottom of the chassis, wherein the sliding convex portion is slidably guided. A guide formed along the direction of movement of the cassette housing is provided on both side walls of the chassis, and the read / write means is arranged so as to face a lower surface of the magnetic disk. An upper magnetic head disposed so as to face an upper surface, wherein the upper and lower magnetic heads sandwich the magnetic disk from the upper and lower surfaces of the magnetic disk in the seated state; In the seating state in which seating the cassette seat of the chassis, the push back force of pushing back biasing means, before
The inclined portion of the serial inclined groove presses the slide convex portion downward
A magnetic disk drive having a configuration .