JPH0132216Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an eject mechanism for a magnetic disk drive, and more particularly to an eject mechanism for ejecting a disk loaded inside the device.

A magnetic disk drive device, which is generally known as a floppy disk drive device, drives a disc-shaped magnetic disk (floppy disk) held in a square diskette into the device together with the diskette. A device that records or reproduces a large number of concentric magnetic tracks on a magnetic disk by loading the disk into a magnetic disk and bringing the head into contact with both sides or one side of the magnetic disk through an opening formed at a predetermined position in the disk. When recording or reproduction is completed, the diskette is ejected from the apparatus via an eject mechanism.

The conventional eject mechanism is configured to include an eject lever whose engagement restraint is released in conjunction with the upward movement of the head plate in the direction away from the magnetic disk, and the eject lever is released from the restraint. The diskette is returned to its original position by the action of the spring, thereby pushing the diskette back and ejecting it.

However, with the configuration of the conventional example described above, it is difficult to time the timing when the head leaves the magnetic disk and when the diskette is ejected, and the diskette starts moving for ejection before the head leaves the magnetic disk. There was a fear that if I did so, I would injure the head. Furthermore,
The configuration of the above-mentioned conventional example has the disadvantage that the configuration is complicated, which is not preferable.

The present invention has been made in view of the drawbacks of the above-mentioned conventional examples, and it is an object of the present invention to provide an eject mechanism that can provide reliable eject timing and has a simple configuration.

The object of the present invention is to provide an eject mechanism that releases the engagement inhibition of the eject lever in conjunction with a cam member that directly or indirectly lowers and raises the head plate by reciprocating rotation. It will be achieved.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

First, the structure of the floppy disk device will be explained with reference to FIG. 1, which is a plan view of the floppy disk device.

In the figure, 1 is a lower substrate, and 2 is an upper substrate, which are fixedly arranged vertically on a frame 3 so as to form a constant interval. A support bridge 5 has a shaft 6 erected vertically downward in the drawing, and is fixed to the upper substrate 2. Reference numeral 7 denotes a clamp lever, the rear end of which is rotatably supported by the upper substrate 2, and a pub collet 8 fitted to the shaft 6 suspended from the tip.
A turning force is applied by the spring 9 in a direction away from the plane of the paper, but this is suppressed by contacting the support bridge 5. The pub collet 8 faces the diskette insertion path through a window 2a formed in the upper substrate 2, and is guided by the shaft 6 and moved up and down by the reciprocating rotation of the clamp lever 7. move. Reference numeral 11 denotes a disk pad lever, which has an arm portion 11a and an upright bending portion 11b, is rotatably supported by the upper substrate 2, and is applied with a turning force in a direction away from the plane of the paper by a spring 12. However, the arm portion 11a abuts against the arm portion 7a of the clamp lever 7 and is restrained. A head carriage 14 is guided by rails 15 and 16, and is reciprocated by a motor (not shown). Reference numeral 17 denotes an upper head plate, which has an arm portion 17a, is rotatably supported by the head carriage 14, and is given a turning force in the direction toward the plane of the paper by a spring (not shown). The arm portion 17a
is in contact with the disc pad lever 11 and is restrained. Reference numeral 18 denotes an upper head, which is fixedly arranged on the back surface of the upper head plate 17. A lower head plate to which a lower head is fixedly arranged is fixed to the head carriage 14 so as to face the upper head plate 17, and a diskette can be inserted between the upper head 18 and the lower head. A gap is formed. 20 is a set lever and a bending arm 20
a, is pivotably supported by the upper substrate 2, and the bending arm 20a is in contact with the disk pad lever 7. A clamp handle 22 is rotatably supported by the frame 3 and the vertically bent portion 2b via a shaft 23.
24 is a cam, which includes a protrusion 24a, an inclined surface 24b' (third
The shaft 23 has a protrusion 24b having a shape shown in FIG. Reference numeral 26 denotes an eject lever, which has bent portions 26a, 26b, tongue portions 26c, hook portions 26d, and slots 26e, and is rotatably and slidably supported by a pin 27 set on the upper substrate 2. Although a left turning force and a sliding force directed toward the clamp handle 22 are applied by the fall spring 28, the slot 26
e is restrained by contacting the pin 27 and the side surface contacting the vertically bent portion 2b.
The bent portion 26a enters the diskette insertion path, and the bent portion 26b enters the vertical bent portion 11.
It has entered the motion trajectory of b.

Next, the operation of the above configuration will be explained.

The state shown in FIG. 1 shows a state in which the diskette has not been inserted and set. In this state, even if the clamp handle 22 is operated, the upper head 18
The head is protected because the lower head cannot come into contact with the lower head. In other words, even if the cam 24 rotates to the left (as viewed from the bottom of the drawing) due to the rotation of the clamp handle 22 and the protrusion 24a pushes down the set lever 20,
The clamp lever 7 is pressed down in conjunction with this, but the disc pad lever 11 is blocked because the vertical bent portion 11b is in contact with the bent portion 26b. Therefore, rotation of the upper head plate 17 is also inhibited by the arm portion 17a coming into contact with the disk pad lever 11.
In this case, the turning force of the clamp lever 7 is absorbed by bending the arm portion 7a and the arm portion 11a.

Next, the operation when a diskette is inserted and set will be explained.

When the diskette D is inserted in the direction of the arrow (FIG. 2), the front surface of the diskette pushes against the bent portion 26a, causing the ejector lever 26 to slide toward the front (downward in the drawing). Then, the vertical bending part 2
When the restraint by b is released, the ejector lever 26 is rotated to the left by the spring 28, and the hook portion 26 is rotated to the left by the spring 28.
d engages with the vertically bent portion 2b. This completes the insertion of the diskette D, and even if the insertion force is released, the diskette D is maintained in the inserted state (the second
figure). In this state, the bent portion 26b
is retracted from the movement locus of the vertically bent portion 11b, and the rotation of the disk pad lever 11 cannot be prevented.

In addition, in front of the eject lever 26 (lower part of the drawing)
By sliding the tongue portion 26c toward the protrusion 24
It climbs onto the inclined surface 24b' of b and slides.

Therefore, after the diskette D is inserted, if the clamp handle 22 is rotated as shown in FIG.
0 is pushed up, and in conjunction with this pushing down, the clamp lever 7, disk pad lever 11, and upper head plate 17 pivot in the direction toward the plane of the paper.
Then, by turning the clamp lever 7, the pub collet 8 is lowered to rotatably clamp the disk F in the diskette D, and by turning the upper head plate 17, the disk F is sandwiched between the upper head 18 and the lower head. .

In this state, when the disk F is rotated and the head carriage 14 is run, the information recorded on the tracks of the disk F is scanned.

Next, in order to take out the diskette D, the clamp handle 22 is rotated in the opposite direction to restore its original position, and at the same time the end surface of the tongue 26c is pushed to the right with the side surface of the protrusion 24b of the cam, and at the same time the pressure on the set lever 20 by the protrusion 24a is released. Just do it. Then, the clamp lever 7, the disk paddle lever 11, and the upper head plate 17 turn and return, and the clamping of the disk F by the pub collet 8 and the pinching between the upper head 18 and the lower head are released, and the hook part 26d and the stand are released. The engagement of the bent portion 2b is released and the eject lever 26 is slid back by the spring 28. Therefore, the diskette D is bent at the bent portion 26.
It is pushed back by a.

As described above, the present invention has a structure in which the engagement inhibition of the ejector lever is released by the cam member that controls the vertical movement of the head plate, so there is no possibility of a malfunction in which the diskette is ejected before the head leaves the magnetic disk. There is an effect. Furthermore,
Since no screws are used in the guide of the eject lever, the configuration is simplified.

[Brief explanation of drawings]

FIG. 1 is a plan view of one embodiment of the present invention, and FIGS. 2 and 3 are plan views showing the state after the operation of FIG. 1. DESCRIPTION OF SYMBOLS 1...Lower board, 2...Upper board, 8...Pub collector, 11...Disk pad lever, 11
b... Standing bending part, 14... Head carriage,
17...Upper head plate, 18...Upper head, 2
0...Set lever, 22...Clamp handle, 24...Cam, 24a...Protrusion, 24b...
Projection, 26...Eject lever, 26a...Bending portion, 26b...Bending portion (stopper portion).

Claims (1)

[Claims for Utility Model Registration] It has a tongue part and a hook part, is held slidably and pivotably by a guide member, and is usually restrained by abutting against the guide member by a spring member. However, an eject lever member that slides in conjunction with insertion of the diskette, turns when the restraint by the guide member is released, and is restrained again by the hook portion engaging the guide member. , a head plate which is movable up and down, but which is normally in a raised position where it does not come into contact with the floppy disk into which the head is inserted; It has a protrusion and a cam having an inclined surface formed in a raised position, and when rotated in one direction, the cam acts directly or indirectly to lower the head plate, and at the same time the protrusion and a cam member that moves to release the tongue from riding up, and by rotating the cam member in the opposite direction and restoring it, the action of the cam part is first released. The head plate returns to the upper position and the head separates from the floppy disk, and then the side surface of the protrusion presses the tongue and pivots the ejector lever member, thereby separating the guide member and the hook. An eject mechanism for a magnetic disk drive device, characterized in that the diskette is ejected by releasing the engagement and restoring the eject lever member by the action of a spring member.