JPS6029112Y2 - Door lock mechanism of flexible magnetic disk device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a door lock mechanism for a flexible magnetic disk device.

Generally, a disk insertion port in a flexible magnetic disk device is closed with a door to prevent dust and the like from entering from the outside.

Further, this door is often locked to prevent it from being opened accidentally during recording, playback, etc. operations.

Conventionally, this type of door lock mechanism engages a locking pawl on the latch side attached to the magnetic disk drive body with an engagement recess provided on the door side, and presses this latch with a stopper rotated by a thread maid mechanism or the like. By doing so, the locking pawl was restrained so that it could not be displaced.

When the solenoid mechanism is released and the stopper is rotated back by the elastic member, the stopper releases the pressure on the latch and is unlocked.In this state, when the push button is pressed to displace the latch, the locking pawl is locked on the door side. It could be removed from the mating recess.

However, in the conventional locking mechanism described above, the stopper rotated based on the operation of the thread maid mechanism directly hits the latch and locks the displacement of the latch.
There have been cases in which the stopper and the latch engage in strong frictional engagement, resulting in so-called biting, and the stopper does not return to rotation even after releasing the locking mechanism.

In order to prevent this, if the elastic force of the elastic member that rotates the stopper to return is increased, it becomes necessary to increase the suction force of the solenoid mechanism, resulting in a problem that the solenoid mechanism becomes larger.

This idea was made based on these circumstances,
The purpose of this is to provide a release member that allows some movement between the locking pawl and to restrict the displacement of this release member with a stopper, thereby preventing the stopper from becoming incapable of return due to biting. Another object of the present invention is to provide a door lock mechanism for a flexible magnetic disk device in which a return elastic body, a solenoid mechanism, and other driving sources can be made smaller.

An embodiment of this invention will be described below with reference to FIGS. 1 to 7.

In the figure, reference numeral 1 denotes a main body of a flexible magnetic disk device, and the main body 1 is equipped with a spindle drive motor 2 and a magnetic head drive motor 3.

The spindle drive motor 2 rotates the spindle 4, and the magnetic head drive motor 3 reciprocates the head 6 via the drive mechanism 5.

A disk insertion port 8 is formed in the device main body 1.

The magnetic disk 7 is inserted through this insertion port 8, and the center hole 9 of the magnetic disk 7 is adapted to fit into the spindle 4 described above.

The disk insertion port 8 is opened and closed by a door 10 that is slidable in the vertical direction shown in the figure.

This door 10 is always urged upward by a spring (not shown).

Further, the door 10 has a gripping collar 11 on the front side and a pair of engaging recesses 12, 12 on the lower part of the back side.

Note that these engaging recesses 12 and 12 may be holes penetrating back and forth.

A locking mechanism 13 for locking the door 10 is installed inside the main body 1 of the apparatus.

The locking mechanism 13 is shown in FIGS. 2 and below.

That is, 14 is a fixed base formed of synthetic resin, and is fixed to the inner surface of the device body 1 via fixing screws 15, 15.

A latch 17, 17 is integrally formed on the base 14 via thin hinge parts 16, 16.

These latches 17.17 have engagement recesses 1 of the door 10.
2 and 12 are integrally formed with locking claws 18 and 18 that can be engaged with each other.

In addition, in the central part located between lunch 17 and 17 above,
A release plate 19 is formed.

The release plate 19 is integrally formed with the base portion 14 via a hinge portion 20, and the release plate 19 is integrally formed with the base portion 14 via a hinge portion 20.
7.17 are separated by grooves 21, 21 so that they can be displaced independently of the latch 17.17.

A push button 22 is integrally protruded from the front surface of the release plate 19, and this push button 22 protrudes from the front surface of the device main body 1.

Therefore, when the push button 22 is pressed in the direction of arrow A,
The release plate 19 is adapted to be displaced in the same direction centering on the hinge portion 20.

Note that a release recess 23 is formed on the back surface of the release plate 19.

On the back of latch 17.17, both latches 17.1
A stopper plate 24 is fixed across the space 7 with screws 25 and 25.

A spacer 26.26 is interposed between the blocking plate 24 and the back surface of the latch 17.17.

Therefore, the blocking plate 24 faces the release plate 19 with a gap equal to the thickness of the spacer 26, 26.

Note that the portion of the blocking plate 24 facing the release recess 23 is cut away.

Further, reference numeral 27.27 is a leaf spring that presses the back surface of the stop plate 24 forward, and the fixing screw 15 is attached to the base 14.
, 15.

Although not shown, a support frame 28 is provided behind the release plate 19 and is fixed to the main body 1 of the apparatus.

A solenoid mechanism 29 as a driving source is attached to the support frame 28, and this solenoid mechanism 29 attracts the plunger 30 by an excitation coil (not shown).

Further, a stopper 32 is attached to the support frame 28 via a pivot pin 31.
is rotatably supported.

The tip of this stopper 32 faces the back surface of the release plate 19.

Further, the rear end of the stopper 32 is connected to the plunger 30 via a connecting pin 33.

Therefore, when the coil of the solenoid mechanism 29 is excited, the plunger 30 is attracted, which causes the stopper 32 to
is adapted to be rotated in a direction opposite to the direction of arrow B.

In this state, the tip of the stopper 32 hits the upper part of the back surface of the release plate 19, that is, above the release recess 23, and restrains the release plate 19.

Note that 34 is a torsion coil spring that rotates and returns the stopper 32 in the direction of arrow B.

Further, 35 is a cushion pad on which the upper end of the plunger 30 is stopped.

The operation of the above embodiment having such a configuration will be explained.

FIG. 2 shows the unlocked state, in which the solenoid mechanism 29 is not energized, so the stopper 32 is rotated in the direction of arrow B under the elastic force of the torsion coil spring 34.

At this time, the plunger 30 has been pulled up and is in contact with the cushion pad 35.

Further, the tip of the stopper 32 faces the release recess 23 of the release plate 19.

On the other hand, since the latch 17.17 is pushed forward by the leaf springs 27, 27, its locking pawls 18, 18 are
It is engaged with the engagement recesses 12, 12 of.

When the push button 22 is pushed in the direction of the arrow A in this state, the release plate 19 is first displaced in the direction of the arrow A with the hinge portion 20 as the center of rotation.

When the button 22 is further pressed, the release plate 19 hits the stop plate 24 and pushes the stop plate 24 in the direction of arrow A as shown in FIG.

Since both sides of the stop plate 24 are fixed to the launches 17.17, displacement of the stop plate 24 in the direction of arrow A causes the latch 17.17 to move against the leaf springs 27, 27 and to move the latch 17.17 against the hinge portion 16. , 16 as the center of rotation in the direction of arrow A.

As a result, the locking claws 18, 18 are disengaged from the engaging recesses 12, 12, and the door 10 is therefore released.

Therefore, the door 10 moves upward and the insertion port 8 is opened.

On the other hand, in order to lock the door from the state shown in FIG. 2, the solenoid mechanism 29 is energized.

The excitation coil of the solenoid mechanism 29 connects the plunger 30 to
Since the stopper 32 is pulled down against the elastic force of the torsion coil spring 34, the stopper 32 is rotated in the direction opposite to the direction of arrow B.

Therefore, the tip of the stopper 32 faces the surface above the release recess 23 on the back surface of the release plate 19, as shown in FIG.

At this time, the tip of the stopper 32 is designed not to hit the release plate 19.

However, the gap between the release plate 19 and the stopper 32 is
This gap is set smaller than the gap between the release plate 19 and the stop plate 24.

Therefore, in the locked state shown in FIG. 7, even if the push button 22 is pressed, the release plate 19 hits the stopper 32 and is prevented from further displacement, and therefore does not hit the stop plate 24. Launch 17.17 cannot be displaced.

As a result, the locking pawls 18, 18 are attached to the engagement recess 12 of the door 10.
, 12 are kept locked, thereby preventing the door 10 from opening.

According to this embodiment, in the locked state, the stopper 32 faces the release plate 19 with a slight gap, so the plunger mechanism 29 is used to release the lock.
When the energization is stopped, the stopper 32 smoothly and reliably returns to rotation in the direction of arrow B by the elastic force of the torsion coil 34.

That is, it is not necessary to apply a large elastic force to the torsion coil spring 34, and therefore the torsion coil spring 34 can be made smaller.

Therefore, the solenoid mechanism 29 also does not require a large force to rotate the stopper 32 against the torsion coil spring 34, and can be made smaller.

In the above embodiment, the latch 17.17 and the release plate 19 share the base 14 and are separated by notches 121.21 so that they are integrally formed. As shown in a modified example, the latches 81, 81 and the release plate 82 may be configured separately and independently from each other.

Further, the stop plate 24 can be configured such that the release plate 19 comes into contact with the release plate 19 when the release plate 19 is displaced by a predetermined amount in the direction of arrow A. It is also possible to form it integrally with the

Further, the push button 22 is not limited to being integrally formed with the release plate 19, and may be formed by integrally combining separate pieces.

The invention described in detail above displaces the latch via the stopper member when the release member operated by the push button is displaced by a predetermined amount or more, thereby disengaging the locking pawl from the engagement recess on the door side. At the same time, the stopper rotated by the drive source is opposed to the blocking member with a slight gap in the rotating state, thereby restraining the displacement of the release member within a range equal to or less than the predetermined amount. It was designed to do so.

Therefore, according to this document, when the stopper is rotated to the locked state, the stopper faces and separates from the release member with a small gap, so the stopper and the release member bite into each other and generate a strong frictional force. That will no longer be the case.

Therefore, since the lock can be released with a small force, the elastic body for returning the stopper can return the stopper with a small elastic force, and this elastic body can be made compact.

As a result, the drive source can be made smaller, and the space required within the device body can also be reduced.

[Brief explanation of drawings]

Figures 1 to 7 show one embodiment of this invention.
The figure is a perspective view of the magnetic disk drive main body, Figure 2 is a cross-sectional view taken along the line A top view, FIG. 5 is an exploded perspective view, FIG. 6 is a sectional view corresponding to FIG. 2 showing the operating state when the door is opened, and FIG. 7 is a sectional view corresponding to FIG. 2 showing the door in the locked state. , FIG. 8 is a view in the direction of arrows corresponding to FIG. 3 showing a modification of this invention. 1... Magnetic disk device body, 7...
Magnetic disk, 8...Disk insertion slot, 10.
...Door, 12.12...Engagement recess, 1
7, 17, 81, 81...Latch, 18.18
...Latching claw, 19,82 ...Release plate, 22 ...Push button, 24 ...
Stop plate, 29... Solenoid mechanism (drive source), 32... Stopper, 34... Torsion coil spring.

Claims (1)

[Scope of utility model registration request] A door that opens and closes a disk insertion port provided on the device main body, an engagement recess formed in the door, and a lock that is attached to the device main body and that locks in the engagement recess when the door is closed. A latch that is provided with a pawl and can be rotated, a blocking member that is displaced integrally with the latch, and a push button that is pressed and pressed by a predetermined amount or more, comes into contact with the blocking member and is locked. a release member that displaces the pawl so as to disengage from the engagement recess; and a release member that is rotated by a drive source installed in the device main body and separated from the blocking member by a distance equal to or less than the predetermined amount when rotated. A door lock mechanism for a flexible magnetic disk drive, comprising: a stopper that faces the release member and restricts the displacement of the release member to a predetermined amount or less; and an elastic body that rotates the stopper to return to its original position.