JP2004022021A - Drive unit of magnetic disk cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent that recording or reproducing is interrupted due to the magnetic disk cartridge being pushed in mistakenly in a drive unit of the magnetic disk cartridge equipped with an ejection mechanism which ejects the magnetic disk cartridge using push-in force. <P>SOLUTION: In the drive unit 10 of the magnetic disk cartridge 20 housing a magnetic disk medium 21 of a disk form rotatably in a casing 23, a magnetic head moving member 13 is set up to move a magnetic head 15 between a position of recording/reproducing time to make the magnetic head 15 counter to a surface of the medium 21 and a retracting position to which the magnetic head 15 is made to retract to position not to counter the surface. An ejection restriction members 17, 18 which take a position to prevent pushing in the magnetic disk cartridge 20 when the magnetic head moving member 13 is in the position of recording/reproducing time, and take a position to permit pushing in the cartridge 20 when the magnetic head moving member 13 is in the retracting position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive device for a magnetic disk cartridge in which a magnetic disk medium is rotatably accommodated in a case, and in particular, a magnetic disk cartridge disposed at a predetermined position for performing magnetic recording and / or reproduction. The invention relates to a drive device having an ejecting mechanism that retreats from a predetermined position when it is pushed.
[0002]
[Prior art]
Conventionally, a flexible magnetic recording medium in which a magnetic layer is formed on both sides of a disk-shaped support made of a flexible polyester sheet or the like, for example, a window portion for inserting a magnetic head formed by joining upper and lower shell halves. There is provided a magnetic disk cartridge that is rotatably accommodated in a case. This type of magnetic disk cartridge is mainly used as a recording medium for computers because of its advantages such as easy handling and low cost.
[0003]
A drive device for driving a magnetic disk cartridge having the above structure generally includes a magnetic head for recording and / or reproducing a signal to / from a magnetic disk medium, and holding the magnetic head, and inserting the magnetic head into a head of the case And a magnetic head moving member composed of an arm or the like that moves between a recording / reproducing position that faces the surface of the magnetic disk medium through the window and a retreat position that retreats from the surface.
[0004]
In this magnetic disk cartridge drive device, an eject mechanism is provided for causing a magnetic disk cartridge disposed at a predetermined position for recording and / or reproduction to be withdrawn from the predetermined position. Conventionally, two types of ejecting mechanisms are roughly used. One is that when the magnetic disk cartridge or the eject button arranged at the predetermined position is pushed in, the magnetic disk cartridge or the eject button is mechanically retracted from the predetermined position using the force. The other is to retreat the magnetic disk cartridge disposed at the predetermined position from the predetermined position by using an electrically driven actuator.
[0005]
[Problems to be solved by the invention]
Compared with the latter, the former of the two types of ejection mechanisms has the advantage that it can be formed at a low cost because an actuator is unnecessary. In this ejecting mechanism, there is no such thing as an operation waiting time of the actuator. Therefore, when the magnetic disk cartridge or the eject button is pushed, the magnetic disk cartridge is immediately ejected. This is an advantage, but it also has a problem that if a magnetic disk cartridge is accidentally pushed, recording or reproduction is interrupted immediately. Therefore, when this magnetic disk cartridge is used as a recording medium of a video camera or a recorder, for example, there may be a disadvantage that important recording or recording timing is missed.
[0006]
SUMMARY OF THE INVENTION In view of the above circumstances, the present invention interrupts recording or reproduction when a magnetic disk cartridge is accidentally pushed in a magnetic disk cartridge drive apparatus having an eject mechanism that ejects the magnetic disk cartridge by using a pushing force. The purpose is to prevent it.
[0007]
[Means for Solving the Problems]
A magnetic disk cartridge drive apparatus according to the present invention is a magnetic disk cartridge drive apparatus in which a disk-shaped magnetic disk medium is rotatably accommodated in a case having a head insertion window.
A magnetic head as described above;
Between the recording / reproducing position where the magnetic head is held and the magnetic head is opposed to the surface of the magnetic disk medium through the head insertion window of the case, and the retracted position where the magnetic head is retracted to a position not facing the surface A magnetic head moving member composed of an arm or the like that moves with
In a magnetic disk cartridge drive device comprising an eject mechanism that ejects the magnetic disk cartridge using the pushing force,
In conjunction with the movement of the magnetic head moving member, when the magnetic head moving member is in the recording / reproducing position, a position that prevents the magnetic disk cartridge from being pushed is taken, and the magnetic head moving member is in the retracted position. In some cases, the magnetic disk cartridge is provided with an eject restricting member that takes a position enabling the magnetic disk cartridge to be pushed in.
[0008]
The above magnetic head moving member may be formed so as to take another position between the recording / reproducing position and the retracted position. As such a position, for example, a position that is a little away from the outer circumference of the magnetic disk medium and that is waiting so that it can quickly shift to the recording / reproducing position can be cited.
[0009]
【The invention's effect】
In the magnetic disk cartridge drive apparatus according to the present invention, in conjunction with the movement of the magnetic head moving member, when the magnetic head moving member is at the recording / reproducing position, the ejection restriction is set to prevent the magnetic disk cartridge from being pushed in. The provision of the member makes it impossible to push the magnetic disk cartridge when the magnetic head is magnetically recorded or reproduced while facing the surface of the magnetic disk medium. Therefore, even if the magnetic disk cartridge is accidentally pushed in at this time, the magnetic disk cartridge is not ejected, and recording or reproduction is not interrupted.
[0010]
The eject restricting member takes a position that allows the magnetic disk cartridge to be pushed in when the magnetic head moving member is in the retracted position (position where the magnetic head is set not to face the surface of the magnetic disk medium). When the magnetic disk cartridge is pushed after the recording or reproduction is finished, the pushing is permitted and the magnetic disk cartridge is normally ejected.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 shows a planar shape of a drive unit 10 of a magnetic disk cartridge according to an embodiment of the present invention in a broken state excluding a top plate. The drive device 10 is formed in a PCMCIA (registered trademark) type II PC card size as an example, and is formed so as to be used by being inserted into a card slot formed in a personal computer (PC), a video camera or the like. It is.
[0013]
FIG. 1 shows a state in which a magnetic disk cartridge 20 is loaded in the drive device 10. As shown in the figure, this drive device 10 is a magnetic head attached to a bottom plate 11 arranged in parallel with the top plate at a distance so as to be rotatable in the direction of arrow A about a rotation shaft 12. An arm 13 is provided. This magnetic head arm 13 as a magnetic head moving member has a portion 14 that is divided into a fork and a back side in the figure, and a magnetic head 15 is attached to each of these portions 14.
[0014]
Further, a rotating member 17 is attached to the bottom plate 11 of the drive device 10 so as to be rotatable in the direction of arrow B about the rotating shaft 16, and a slide member 18 is attached so as to be movable in the vertical direction in the figure. It has been. The rotating member 17 and the slide member 18 constitute an eject limiting member in the present invention.
[0015]
On the other hand, the magnetic disk cartridge 20 includes a 1.8-inch disk-shaped flexible magnetic disk medium 21 having a head insertion window 22 as disclosed in, for example, Japanese Patent Application No. 2002-117838. 23 is housed in a rotatable manner. When the magnetic disk cartridge 20 is not in use, the head insertion window 22 is closed by a shutter 24, but the magnetic disk cartridge 20 is inserted upward from the cartridge receiving port 10a and loaded into the drive device 10. At this time, a shutter driving member (not shown) connected to the shutter 24 is pushed and driven by the shutter opening member on the drive device 10 side, and thereby the shutter 24 is opened and the state shown in FIG. 1 is obtained.
[0016]
Before the magnetic disk cartridge 20 is loaded into the drive apparatus 10 as described above, the magnetic head arm 13 is in a position (retracted position) shown in FIG. 3 to be described later, but after the magnetic disk cartridge 20 is loaded, the drive apparatus When a recording or reproduction command is given to 10, the magnetic head arm 13 rotates counterclockwise in the figure, and the magnetic head 15 is opposed to the surface of the magnetic disk medium 21 as shown in FIG. / Playback position).
[0017]
Here, the rotating member 17 constituting the eject limiting member is biased so as to rotate clockwise in the figure by a spring (not shown). Therefore, if an external force does not act on the rotating member 17, the rotating member 17 is in a state where the upper end portion of the L-shape contacts the upper end of the slide member 18 as shown in FIG. 1.
[0018]
When the drive device is not in use, the magnetic head arm 13 takes the retracted position shown in FIG. 3, and the wide rear end presses the lower end of the rotating member 17. As a result, the rotating member 17 rotates counterclockwise in the figure against the biasing force received by the rotating member 17, and the position shown in FIG. Take the position that has left. The slide member 18 is urged downward in the figure by a spring (not shown).
[0019]
When the magnetic head arm 13 is in the recording / reproducing position shown in FIG. 1, the magnetic head 15 facing the surface of the magnetic disk medium 21 is used to perform magnetic recording or reproduction on the magnetic disk medium 21. Can be made. The position of the magnetic head arm 13 in FIG. 1 changes so as to change the position of the magnetic head 15 (the radial position of the magnetic disk medium 21) with the progress of recording or reproduction.
[0020]
The drive device 10 of the present embodiment is configured such that the magnetic head arm 13 takes the standby position shown in FIG. 2 in case the recording / reproducing data transfer rate is higher than the interface data transfer rate. Has been. In this state, it is impossible to perform magnetic recording or reproduction with respect to the magnetic disk medium 21 using the magnetic head 15, but when the next recording or reproducing instruction is given, the magnetic head arm 13 is shown in FIG. 1 can be quickly transferred to the recording / reproducing position shown in FIG.
[0021]
Specifically, the magnetic head arm 13 takes the retracted position shown in FIG. 3 when an EOF (End of File) signal is input when the drive device 10 is used in a personal computer, for example. When used in a video camera, it is when the STOP button is pressed.
[0022]
The drive device 10 has a known eject mechanism (not shown) for discharging the magnetic disk cartridge 20 out of the device when the loaded magnetic disk cartridge 20 is slightly pushed in from the rear end face (lower end face in the figure) side. It has. Therefore, when recording or reproduction is completed and the magnetic head arm 13 is in the state shown in FIG. 3, when the rear end surface of the magnetic disk cartridge 20 is pressed, the magnetic disk cartridge 20 is ejected. In this case, since the upper end portion of the rotating member 17 protrudes laterally from the upper end of the slide member 18, the slide member 18 is pushed by the convex portion 23a of the case 23 of the magnetic disk cartridge 20 that has been pushed in. Move upward to allow this indentation.
[0023]
On the other hand, when the rear end surface of the magnetic disk cartridge 20 is pushed while the magnetic head arm 13 is at the recording / reproducing position shown in FIG. 18, and the upward movement of the slide member 18 is blocked by the L-shaped upper end portion of the rotating member 17, so that the magnetic disk cartridge 20 cannot be pushed in. Not. The same applies to the case where the magnetic head arm 13 is in the standby position shown in FIG. 2 and is prepared for magnetic recording or reproduction.
[0024]
In the above-described embodiment, the eject limiting member is composed of two members, that is, the rotating member 17 and the slide member 18. However, this eject limiting member may be composed of one member.
[0025]
The drive device of the present invention is not limited to the 1.8-inch type flexible magnetic disk cartridge 20 described above, and is applicable to drive devices that handle all other types of magnetic disk cartridges, including magnetic disk cartridges using hard disks. Are equally applicable.
[Brief description of the drawings]
FIG. 1 is a partially cutaway plan view showing a drive device of a magnetic disk cartridge according to an embodiment of the present invention. FIG. 2 is a partially cutaway plan view showing another state of the drive device shown in FIG. FIG. 2 is a partially broken plan view showing still another state of the drive device 1
DESCRIPTION OF SYMBOLS 10 Drive apparatus 13 Magnetic head arm 15 Magnetic head 17 Rotating member 18 Slide member 20 Magnetic disk cartridge 21 Magnetic disk media 22 Head insertion window 23 Case 24 Shutter

Claims (1)

A magnetic disk cartridge drive device in which a disk-shaped magnetic disk medium is rotatably accommodated in a case having a head insertion window,
A magnetic head for recording and / or reproducing signals on the magnetic disk medium;
Between the recording / reproducing position where the magnetic head is held and the magnetic head is opposed to the surface of the magnetic disk medium through the head insertion window of the case, and the retracted position where the magnetic head is retracted to a position not facing the surface A magnetic head moving member that moves with
A drive device for a magnetic disk cartridge, comprising: an eject mechanism that causes the magnetic disk cartridge disposed at a predetermined position for recording and / or reproduction to be retreated from the predetermined position when the magnetic disk cartridge is pushed in In
In conjunction with the movement of the magnetic head moving member, when the magnetic head moving member is at the recording / reproducing position, a position that prevents the magnetic disk cartridge from being pushed is taken, and the magnetic head moving member is moved to the retracted position. A drive device for a magnetic disk cartridge, comprising: an ejection restricting member that takes a position that allows the magnetic disk cartridge to be pushed in when present.

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