JPH0326467B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device having a mechanism for ejecting a magnetic disk cassette.

Prior Art Conventionally, in this type of magnetic disk device,
It is equipped with a cassette guide to securely insert the magnetic disk cassette into the device, a positioning pin to determine the position of the cassette, an eject arm and an eject lever biased by a spring, etc. to eject the cassette. To insert a magnetic disk cassette into the device as shown in FIG. Position and secure the cassette by moving it downward so that the positioning pins in the device fit together.

When attempting to eject the cassette, the locating hole is removed from the locating pin by operating the eject arm, and the ejecting lever biased by the spring ejects the cassette. It will be pushed out and discharged in the direction of arrow A in FIG.

In this case, the magnetic head should be pushed out by the ejection lever after it has retreated from the head window 1c of the cassette, but since the cassette moves in the direction A immediately after it comes off the positioning pin, the magnetic head cannot escape from the head window 1c of the cassette. The disadvantage is that the magnetic head and cassette may come into contact with each other and cause damage or damage to them, or the device may not return to its initial state.

Purpose The present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art, and it is possible to reliably retract the magnetic head without contacting the cassette during cassette ejection operation, and to ensure that the magnetic head is in the initial state at the end of the operation. The object of the present invention is to provide a magnetic disk device configured to return to the original state.

Embodiments The present invention will be described in detail below based on embodiments shown in the drawings.

In Fig. 1, the reference numeral 1 indicates a magnetic disk cassette, which has a positioning hole 1a for positioning and a shutter lever 1b, and is used to record and play back by contacting the magnetic disk stored inside. A head window 1c is provided through which a magnetic head can enter and exit.

2 to 6 show embodiments of the present invention, 2 is a cassette guide for guiding the insertion of the cassette 1, and 3 is an eject arm for raising and lowering the cassette 1 and performing an ejecting operation. One end thereof has a claw 3a for pushing up a leaf spring 4, which will be described later, and a guide groove 3b parallel to the insertion and ejection directions (arrows A and B) of the cassette 1 in FIG. There is.

Reference numeral 4 denotes a leaf spring for pushing the latch pin 5 into the positioning hole 1a of the cassette 1, one end of which is fixed to the cassette guide 2 by a fixing pin 6, and the free end that presses the latch pin 5 at the other end. , has an inclined portion 4a that can be engaged with and disengaged from the claw 3a of the eject arm 3. Reference numeral 7 denotes a slide guide pin of the eject arm 3, 8 a washer, and 9 a positioning pin for positioning the cassette 1 fixed to the base 10 of the apparatus, which are arranged integrally with the base reference surface 10a. The ejection lever 11 for ejecting the cassette is always held in the fifth position by a coil spring 12.
In the figure, it is energized in the direction of arrow A.

Next, the operation of this embodiment configured as above will be explained.

Figure 6 shows the positional relationship of the internal mechanisms of the device in its initial state.
When the cassette 1 is inserted into the cassette guide 2 along the direction, the tip of the cassette 1 pushes up the slope of the lower end of the latch pin 5, which is biased by the leaf spring 4, comes into contact with the ejection lever 11, and then the coil spring 12 is applied. When it reaches the innermost end against the force, the latch pin 5 and the positioning hole 1a of the cassette 1 match, and the latch pin 5 is fitted into the hole 1a by the biasing force of the leaf spring 4, resulting in the state shown in FIG. 4. . At this time, the biasing force of the spring 12 will cause the cassette 1 to
Even if the latch pin 5 is inserted into the positioning hole 1a, it cannot be moved in the direction of arrow A, which is the discharge direction.

At this time, the ejection lever 11 detects that the cassette 1 has reached a predetermined position, releases the lock lever (not shown), and the eject arm 3, which is biased in the direction of arrow A by a spring (not shown), moves in the direction of arrow A. At the same time, the cassette guide 2, which is interlocked with a cam (not shown), moves downward, and the positioning pin 9
enters the lower side of the positioning hole 1a of the cassette 1, and the cassette 1 comes into contact with the base reference surface 10a, resulting in the state shown in FIG.

When trying to eject the cassette 1, first push the eject arm 3 in the direction of arrow B, and then the cassette guide 2 moves upward by an interlocking cam (not shown) and ejects the cassette from the positioning hole 1a of the cassette 1. When the positioning pin 9 is removed, the eject arm 3, which is interlocked with the cassette guide 2, is held by a lock lever (not shown), resulting in the state shown in FIG. 4. In this state, in the conventional case, the claw 3
a. Since the leaf spring 4, the inclined part 4a, the latch pin 5, etc. are missing, if the cassette 1 is removed from the positioning pin 9, the cassette 1 will immediately pop out in the direction of arrow A, and the ejecting operation (the magnetic head will not completely come out of the head window). There were cases where I had to stop midway through the process (including the action of retreating).

In the present invention, by further pushing the eject arm 3 in the direction B from the state shown in FIG.
The inclined portion 4a of the latch pin 5 is pushed up to remove the force applied to the latch pin 5, which
cannot resist the urging force of the coil spring 12 and slips out of the positioning hole 1a, and the cassette 1 is pushed out in the direction of arrow A and ejected.

In the above explanation, the leaf spring 4 and the latch pin 5 are separate bodies and are not integrated, but it goes without saying that they may be replaced by welding, gluing, or molding as an integral part. .

Effects As is clear from the above description, according to the present invention, in a magnetic disk device having an ejecting mechanism for ejecting a magnetic disk cassette from the magnetic disk device by energizing the magnetic disk cassette with an energizing means, the magnetic disk cassette can be ejected from the magnetic disk device. A mechanism is provided to hold the cassette inserted in the disk drive against the urging force of the urging means in the ejecting mechanism, and the magnetic head is retracted from the head window to the cassette in response to an eject operation. After the holding by the holding mechanism is released, and after this release, the cassette is ejected by the energizing means, so that the ejecting operation of the cassette can be performed reliably, and the ejecting operation can be performed as before. It is possible to provide a magnetic disk device in which there is no risk of the cassette popping out during the process and damaging the magnetic head or disk.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the magnetic disk cassette, Figure 2 is a perspective view of the magnetic disk cassette.
The figure is a perspective view showing the main parts of the present invention, Figures 3 to 6 are cross-sectional views explaining the operation of the present invention, Figure 3 is a cross-sectional view showing the state in which the cassette is installed, and Figure 4 is a cross-sectional view showing the state in which the cassette is installed. FIG. 5 is a sectional view showing the initial state in which the cassette guide has moved to the highest position, FIG. 5 is a sectional view showing the cassette in the ejected state, and FIG. 6 is a sectional view showing the initial state in which the cassette is inserted. 1...Magnetic disk cassette, 1a...Positioning hole, 1c...Head window, 2...Cassette guide, 3...Eject arm, 3a...
...Claw, 4...Plate spring, 4a...Slope portion, 5...Latch pin, 9...Positioning pin, 10...Base, 10a...Base reference surface, 11...Ejection lever, 12...Coil spring.

Claims (1)

[Scope of Claims] 1. A magnetic disk device having a magnetic disk cassette and an ejecting mechanism that is energized by an energizing means to eject the cassette from the magnetic disk device, the ejecting mechanism ejecting the cassette inserted into the magnetic disk device. A mechanism for holding the magnetic head in the disk device against the urging force of the urging means is provided, and after the magnetic head is evacuated from the head window of the cassette in response to an eject operation, the holding by the holding mechanism is released; A magnetic disk device characterized in that the cassette is ejected by the urging means after release.