JPH01208761A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the operability of a magnetic recording and reproducing device and, at the same time, to reduce the number of parts used for the device by actuating an attaching/detaching means which moves a cassette in the vertical direction by utilizing the rotation of a shutter opening/closing means which opens/closes the shutter of a holder for supporting the cassette. CONSTITUTION:When a cassette 2 is put into a holder 15 and the holder is inserted into a magnetic recording and reproducing device, the front end section of the cassette 2 pushes the end of a shutter lever 19 and the shutter of the cassette 2 is opened. When the shutter lever 19 becomes almost perpendicular to the inserted direction of the cassette 2, the shutter is fully opened. When the shutter is fully opened, a lever pin 22 planted in a holder attaching/detaching means 11 is separated from a lever cam 21 and the means 11 is moved in the cassette taking-out direction by means of a forcing means 12. By the movement of the means 11, guide rollers 16 of the holder 15 get into inclined grooves 11a on both side-walls of the means 11 and are depressed downward along the grooves 11a. As a result, the cassette is fixed to a prescribed position of a driving device. Therefore, a magnetic recording and reproducing device which is less in the number of using parts and excellent in operability with a simple structure is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording/reproducing device, and more particularly to a cassette attachment/detachment mechanism of a magnetic disk device for recording/reproducing information on a magnetic disk.

[Conventional technology]

In a magnetic disk device that records and reproduces information on a magnetic disk, a cassette attaching/detaching mechanism for loading and ejecting a cassette containing a magnetic disk into the device is conventionally described in Japanese Patent Laid-Open No. 61-63964. The proposal is known. In this proposal, means for opening and closing the shutter of the cassette and means for controlling the elevation of the holder into which the cassette is inserted and held are mounted on the top surface of the holder. During ejection, the operation of the shutter opening/closing means is controlled by the lifting and lowering movement of the holder.

[Problem to be solved by the invention]

However, according to the above-mentioned conventional technology, there are problems in that the number of parts is large, the manufacturing workability is poor, the cost is high, and the operability is poor.

An object of the present invention is to provide a magnetic recording and reproducing device with a small number of parts, a simple structure, and good operability.

[Means to solve the problem]

The above problem involves a holder that supports a cassette containing a magnetic disk, a drive device that rotates the magnetic disk, and a carriage that is equipped with a magnetic head that records and plays information on the magnetic disk. a moving means for moving the cassette in a direction; an attaching/detaching means for lowering and raising the holder to attach/detach the cassette to/from the drive device; a shutter opening/closing means for opening/closing a shutter provided on the cassette; and a chassis including the entire cassette. a holder having guide rollers on both sides along the insertion direction of the cassette; and a holder having inclined grooves for guiding the guide rollers and provided on both sides along the insertion direction of the cassette; The holder is made up of a wall and a bottom plate connecting the two side walls, and has a lever pin installed on one side wall of the bottom plate for controlling the direction of insertion and removal of the cassette according to the rotational position of a lever cam integrally formed with a shutter lever. means; urging means for the holder attaching and detaching means for urging the holder attaching and detaching means in the cassette ejecting direction; and a shutter lever shaft rotatably supported by passing a pin vertically attached to the chassis through the shaft center; A shutter opening/closing means includes a shutter lever mounted horizontally on the shaft and urged to rotate in the cassette ejecting direction, and a lever cam integrally formed with the shutter lever at a position substantially perpendicular to the shutter lever shaft. This problem is solved by a magnetic recording and reproducing device equipped with

[Effect]

When the cassette is placed in the holder with the above structure and inserted into the device of the present invention, as the front end of the cassette projects against the tip of the shutter lever and rotates against the urging force of the shutter lever, the cassette The shutter opens, and when the shutter lever becomes approximately perpendicular to the cassette insertion direction, the shutter becomes fully open. At this time, the lever pin mounted on the holder attachment/detachment means is disengaged from the lever cam, and only when the lever pin is disengaged from the lever cam, the holder attachment/detachment means is moved in the cassette ejection direction by the biasing means of the holder attachment/detachment means. As a result of this movement, the guide rollers of the holder enter the inclined grooves on both side walls of the attachment/detachment means and are pushed down along the inclined grooves, thereby fixing the cassette at a predetermined position in the drive device. When taking out the cassette, the opposite operation to that described above occurs, and when the holder is pushed in the cassette insertion direction, the holder is guided by the inclined grooves on both side walls of the attachment/detachment means and moves upward.When pushed further, the lever pin stops the rotation of the shutter lever. As the lever cam moves from the stepped part that was restrained to a position where it can rotate, the shack lever, which is urged to rotate in the cassette ejecting direction, closes the cassette shutter and the cassette is ejected together with the holder in the cassette ejecting direction. Ru.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a magnetic recording and reproducing apparatus according to the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 to 3.

A drive device 3 is provided at the center of the chassis 1 for rotating a magnetic disk (not shown) housed in a cassette 2. As shown in FIG. A pair of guide rails 4 are mounted in parallel on the chassis 1 at a position facing the drive device 3, and a magnetic head 5 for recording and reproducing information on the magnetic disk is mounted on the guide rails 4. A mounted carriage 6 is slidably mounted. The carriage 6 is guided to the guide rail 4 by the rotation of a stepping motor 10 via a feed cam 7 provided on the side and a drive shaft 9 formed with an outer diameter thread 8 that fits with the feed cam 7. The magnetic head 5 is moved on the radius of the magnetic disk. A substantially U-shaped eject lever 11 is provided on the chassis 1 so as to be movable along opposite sides of the chassis 1. Both sides of the eject lever 11 are bent upward at right angles, and these side surfaces are bent upward at right angles. Two pairs of guide grooves 11a are formed obliquely to the bottom surface. Further, one end of a pair of springs 12 is fixed to the eject lever 11, and the other end of a pair of springs 12 is fixed to the chassis 1, and the eject lever 11 is biased toward the left in FIG.
do. Furthermore, two pairs of notches 11b are formed on both sides of the bottom surface of the eject lever 11, from which four cassette seats 13 fixed to the chassis 1 can protrude. Further, an eject button 14 is provided at the end of the eject lever 11 on the cassette insertion side so as to protrude from the front panel 1a of the chassis 1. On the other hand, two pairs of guide holes 1b are vertically formed at positions substantially aligned with the guide grooves 11a formed in the eject lever 11 on the side surface of the chassis 1, with the same spacing as the guide grooves 11a. Two pairs of guide rollers 16 provided on both sides of the holder 15 that supports the cassette 2 are engaged with these guide holes 1b so as to be movable up and down.

A boss 17 is provided on the bottom surface near one side of the chassis 1, and the boss 17 passes through a long hole 18 formed on one side of the eject lever 11 and projects upward. And this boss 17 has a shutter lever 19
is formed at one end thereof and is rotatably mounted through a mounting hole 20. Further, a sector-shaped lever cam portion 21 is provided in the horizontal plane of the shutter lever 19 in a direction perpendicular to the longitudinal direction of the shutter lever 19 . A lever pin 22 erected on the eject lever 11 is pressed into contact with this lever cam portion 21 by the biasing force of a spring 21 . Further, the shutter lever 19 is provided with a locking portion 24 that locks the other end of a shutter spring 23 whose one end is locked with a locking portion 1c provided on the side surface of the chassis 1. As a result, the shutter lever 19 is biased to rotate counterclockwise in the figure about the boss 17. Furthermore, the mounting hole 20 of the shutter lever 19
The eject lever 1 is located at the bottom of one end where the eject lever 1 is formed.
A flange portion 25 is provided between the bottom surface of the chassis 1 and the top surface of the chassis 1 to prevent the shutter lever 19 from being removed. Further, at one end of the shutter lever 19 on the side opposite to the mounting hole 20, a shutter pusher 26 is provided which contacts a shutter provided on a cassette 2, which will be described later, to open and close the shutter.

Next, the operation of this embodiment will be explained with reference to FIGS. 4 to 6. When mounting the cassette 2, the cassette 2 is first inserted into the holder 15 through the cassette insertion opening of the front panel 1a shown in FIG. Before this holder 15 moves, when the cassette 2 is inserted, the shutter pushing part 26 of the shutter lever 19 rotates clockwise in the figure along the shutter lever guide 2a formed on the front surface of the cassette 2.
As shown in FIG. 4(a), it comes into contact with the end of the shutter 27 provided on the cassette 2. In this state, the lever cam 21 provided on the shutter lever 19 is moved between the lever pin 21 mounted on the eject lever 11 as shown in FIG.
It engages and rotates.

Movement of the eject lever 11 is stopped by engagement between the lever cam 21 and the lever pin 22. Therefore, the cassette 2 is supported by the guide portions 11c on both upper surfaces of the eject lever 11 via the guide rollers 16, and is located above. If you continue to insert the cassette 2, the shutter lever 19
is rotated clockwise in the figure against the biasing force of the shutter spring 23 until it becomes substantially perpendicular to the insertion direction as shown in FIG. 5, and the shutter 27 is opened by the shutter pusher 26. In this state, as shown in FIG.
1a and the lever pin 2 provided on the eject lever 11
2 is disengaged, and the movement of the eject lever 11 is unlocked.

As a result, the eject lever 11 is moved in the cassette ejection direction by the biasing force of the spring 12, as shown in FIG. In this state, the lever pin 22 has moved to the base of the stepped portion 21b of the lever cam 21, as shown in FIG. At the same time, a guide roller 16 provided on the holder 15 is guided by oblique guide grooves 11a formed on both sides of the eject lever 11, and the holder 15 is also guided into a guide hole 1b formed in the chassis 1 shown in FIG. You will be guided and move downwards. Therefore, the cassette 2 supported by the holder 15 also moves downward at the same time, and the cassette 2 is placed on the cassette seat 13 provided on the chassis 1, and the hub of the magnetic disk (not shown) is placed on the hub receiving surface of the drive device 3. The cassette 2 is mounted in contact with the cassette 3a.

When ejecting the cassette 2, by pushing in the eject button 14 provided at one end of the eject lever 11, the guide roller 16 provided in the holder 15 is pushed up by the lower surface of the guide groove 11a formed in the eject lever 11. As a result, the cassette 2 is also pushed up together with the holder 15, and at the same time, the lever pin 22 mounted on the eject lever 11 moves along the stepped portion 21c of the lever cam 21, and the engagement between the lever pin 22 and the stepped portion 21b is disengaged. Until the engagement between the lever pin 22 and the stepped portion 21b is completely disengaged, the rotation of the shutter lever 19 is locked and the shutter 27 of the cassette 2 remains open. However, when the eject lever 11 is pushed in, the guide roller 16 moves to the guide portion 1 on the upper surface of the eject lever 11.
1c, and when the upward movement of the holder 15 and cassette 2 is completed, the stepped portion 21c of the lever cam 21, which is integrally formed with the shutter lever 19, completely touches the lever pin 2.
2, the shutter lever 19 is unlocked from rotation and rotates counterclockwise in the figure by the biasing force of the shutter spring 23. As a result, the cassette 2 is ejected by the shutter pusher 26 of the shutter lever 19, and the shutter 27 is also closed at the same time.

According to this embodiment, since the single shutter spring 23 is configured to perform the push-back operation of the shutter lever 19 and the locking operation of the eject lever 11, the cassette
The insertion force when inserting can be reduced, improving operability. Further, since the eject lever 11 is interlocked with the shutter lever 19 to control the upward and downward movement of the holder 15, the number of parts is reduced and manufacturing is facilitated.

Furthermore, in the process of lowering the cassette 2, the shutter lever 1
9 is a lever pin 22 provided on the eject lever 11
Since the rotation of the cassette 2 is stopped by the engagement of the stepped portion 21b, no force is generated to push back the cassette 2, and the cassette 2
is correctly mounted on the hub receiving surface 3a of the drive device 3, the hub receiving surface 3a and the hub of the disk are reliably engaged, and it is possible to prevent mounting errors from occurring. Note that the structure of each part of the embodiment described above may be changed without departing from the spirit of the present invention.

〔Effect of the invention〕

As described above, according to the present invention, the attachment/detachment means for raising and lowering the cassette is actuated by the rotation of the shutter opening/closing means that is provided in a magnetic recording/reproducing device such as a magnetic disk device and opens and closes the shutter of the holder that supports the cassette. This reduces the insertion force when inserting the cassette, improving operability. In addition, the number of parts is small, the workability in manufacturing is improved, and costs can be reduced. Furthermore, since the shutter opening/closing means is stopped from rotating by the lever pin provided on the attaching/detaching means when the cassette is lowered, no force is generated to push back the cassette, and the cassette can be mounted in the correct position on the drive device.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of the magnetic recording/reproducing device according to the present invention, FIG. 2 is a side view of FIG. 1, FIG. 3 is an enlarged exploded perspective view of the main parts of FIG. 1, and FIG. , 5 and 6 are principal part plan views showing the operation of this embodiment. 2... Cassette, 3... Drive device, 5... Magnetic head, 6... Carriage, 10... Stepping motor (moving means), 11... Eject lever (attachment/detaching means), 11a. ...Guide groove, 15...Holder, 1
6... Guide roller, 18... Long hole, 19... Shutter lever, 21... Lever cam, 22... Lever pin.

Claims (1)

[Claims] 1. A holder that supports a cassette containing a magnetic disk; a drive device that rotationally drives the magnetic disk;
a moving means for moving a carriage mounted with a magnetic head for recording and reproducing information on the magnetic disk in the radial direction of the magnetic disk; and an attachment/detachment means for lowering and raising the holder to attach/detach the cassette to/from the drive device. means and
A magnetic recording/reproducing device comprising a shutter opening/closing means for opening/closing a shutter provided on the cassette, and a chassis encompassing the whole, comprising: a holder having guide rollers on both sides along the insertion direction of the cassette; the guide rollers; A lever cam is formed integrally with the shutter lever on one side wall side of the bottom plate. a holder attachment/detachment means having a lever pin planted therein for controlling the cassette insertion/extraction direction according to the rotational position; a biasing means for the holder attachment/detachment means for urging the holder attachment/detachment means in the cassette extraction direction; and a holder perpendicular to the chassis; A shutter lever shaft is rotatably supported with an attached pin passing through the shaft center, a shutter lever is mounted horizontally on this shaft and is biased to rotate in the cassette ejecting direction, and a shutter lever shaft is approximately centered on the shutter lever shaft. 1. A magnetic recording and reproducing device comprising a shutter opening/closing means consisting of a shutter lever and a lever cam integrally formed at a right angle position.