JPS61178780A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the size and weight of the device as a whole by forming two floppy disk devices by one spindle motor and one stepping motor. CONSTITUTION:First and second magnetic heads 32, 33 perform recording and reproducing the information for magnetic disks 1, 2 mounted to first and second spindles 22, 23, respectively. Head arms 36, 37 are energized elastically by a spring 42 towards the magnetic disk 2. When the magnetic disk 2 is in operation, the magnetic disk 2 is interposed between the magnetic head 32 and an upper magnetic head or head pad 38 or between the magnetic head 33 and the upper magnetic head 33 and the upper magnetic head or head pad 39 to make possible recording and reproducing the information. A stepping motor 43 for reciprocating linear movement is converted into-rotational movement by a steel belt 46 wound in a alpha-state to a pulley 45 fixed to the rotational shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floppy disk drive device.

2. Description of the Related Art In recent years, the demand for disk drives as external storage devices for computers has rapidly increased.

This is because floppy disks are easy to handle, inexpensive, and removable like tape memory. Recently, floppy disk drives have been especially built into portable personal computers and word processors, and as these devices themselves become smaller and lighter, smaller and thinner floppy disk drives are desired. However, on the other hand, the storage capacity of devices tends to be increased.

Conventionally, a plurality of floppy disk drives have been built into a device to increase the storage capacity of the device or to meet the requirements of the device specifications.

FIG. 6 shows the main components of a typical floppy disk device.

Reference numeral 1 denotes a cartridge rotatably housed in a flexible magnetic disk 21 within a resin case 6, and drive holes 4 and elongated holes 6 are provided on both sides of the cartridge. A reinforcing hub 3 is fixed to the center of the magnetic disk 2, and is rotatably fitted into a drive hole 4. The cartridge 1 is positioned at a predetermined position, the spindle 7 is tightly fitted into the central hole 3a of the hub 3, and the hub 3 is supported by the hub receiver 8, thereby becoming operational. 1o is a spindle motor, and its rotation is transmitted to a spindle pulley 9 fixed to the end of the spindle 7 through a transmission belt 11t.

Reference numeral 13 denotes a magnetic head for recording and reproducing information on the magnetic disk 2. The magnetic head 13 is mounted on the upper part of the head support 12 capable of reciprocating linear movement along the guide rod 14, and is inserted through the long hole 6 of the cartridge 1. It comes into contact with the surface of the magnetic disk 13. Reference numeral 16 denotes a stepping motor for linearly moving the head support all the way back and forth, and a steel belt 1 is wound in an α shape around a pulley 16 fixed to a rotating shaft.
7 constitutes a head transfer device that converts rotational motion into linear motion. A pressure arm 18 holds an upper magnetic head or head pad 19 near one end, and the other end is swingably supported by the head support 12 via a support plate spring 20. To the above Rad arm 1
8 is elastically biased toward the magnetic disk 2 by a pressure spring 21, and when the magnetic disk 2 is in the above operating state, the magnetic disk 2 is held between the magnetic head 13 and the upper magnetic head or head pad 19. be done (more than that,
Shoji Takahashi, ``Recent floppy disk devices and their application know-how'').

When a plurality of floppy disk devices configured as described above are housed in the same device, the arrangement relationships shown in FIGS. 6 to 8 may be considered, for example. When trying to make these devices smaller and lighter, floppy disk devices are also required to be smaller and lighter.

Problems to be Solved by the Invention However, with the above-mentioned configuration of the floppy disk device, there is a limit to the miniaturization and weight reduction of the floppy disk device itself, so it is necessary to achieve a dramatic reduction in size and weight within the scope of conventional technology. It was difficult.

Means for Solving the Problems The present invention provides a method for overlapping two floppy disk devices as shown in FIGS. 7 and 8 when a plurality of floppy disk devices are built into the same device as described above. Regarding the problems when the spindle motor and the two spindles that are driven by the spindle motor are parallel to each other, and the rotation noise of the spindle motor and the two spindles that are driven by the spindle motor, It has a transmission belt for each transmission, a head support on which a plurality of magnetic heads are mounted, and a head transfer device that reciprocates the head support almost linearly, and half of the plurality of magnetic heads. The magnetic heads record on and read from the magnetic disk attached to one of the two spindles, and the remaining half of the magnetic heads record and read from the magnetic disk attached to the other spindle. Floppy disk device? It consists of

Effect of the Invention With the above-described configuration, the present invention conventionally requires one spindle motor and one stepping motor for a single floppy disk device, but if two devices are built into the same device, a total of two motors are required. However, two floppy disk drives can be realized using one spindle motor and one stepping motor, and the entire device can be made smaller and lighter.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. Figures 1 and 2 show the configuration of a floppy disk device according to a first embodiment of the present invention.As shown in Figure 8, the device has a floppy disk insertion slot on both sides. Applicable in the case of

In FIG. 1, reference numeral 1 denotes a cartridge having the same structure as that commonly used, and has a magnetic disk 2 built therein. The two cartridges 1 are positioned at predetermined positions, the first spindle 22 and the second spindle 23 are respectively engaged with the central hole (not shown) of a hub provided on the magnetic disk 2, and the hub is It is brought into operation by being supported by hub receivers 24 and 26.

26 is a spindle motor, and its rotation is transmitted via transmission belts 27 and 28t to a spindle pulley 29 fixed to the end of the first spindle 22 and a spindle pulley 3o fixed to the end of the second spindle 23, respectively. . FIG. 2 is a side view of the floppy disk device shown in FIG. 28 share the drive pulley 31, and each spindle pulley 2
It is hung on 9 and 30. The first spindle 22 and the second spindle 23 are substantially parallel to each other, so that the transmission belts 27 and 28 transmit rotation without twisting, while the two magnetic disks 2
Supported in positions substantially parallel to each other or included in the same plane.

In FIG. 1, 32 is a first magnetic head for recording and reproducing information on the magnetic disk 2 mounted on the first spindle 22, and 33 is a first magnetic head for recording and reproducing information on the magnetic disk 2 mounted on the second spindle 23. This is a second magnetic head for recording and reproducing information, and both are mounted near both ends of a head carriage 36 capable of reciprocating linear movement along a guide rod 34. 36 and 37 have upper magnetic heads or head pads 38 and 3 near one end.
9i, the other end of which is swingably supported by the above-mentioned Herad carriage 36 via support plate springs 4o and 41.

The disk arms 36 and 37 are each elastically biased toward the magnetic disk 2 by a pressure spring 42, and when the magnetic disk 2 is in the operating state, the magnetic disk 2 is connected to the magnetic head 32 and the upper magnetic head, respectively. or by the head pad 38, or by the magnetic head 33 and the upper magnetic head or head pad 39,
It becomes possible to record and reproduce information. 43 is the above Herad carriage 36. This is a stepping motor for linearly reciprocating the head support 44, which is composed of a head arm 36, a 37° pressure spring 42, etc., and is driven by a steel belt 46 wound in an α-shape around a pulley 46 fixed to a rotating shaft. It constitutes a head transfer device that converts rotational motion.

In the above embodiment, when the magnetic disk 2 built in the car IJ ridge is for single-sided recording, the above 38 and 39 are helad pads, and pads made of felt are generally used. When the magnetic disk 2 is for double-sided recording, upper magnetic heads 38 and 39 can be used, and the total number of magnetic heads in the floppy disk device having the above configuration is four. In either case, half of the magnetic heads perform recording and reproduction on the magnetic disk 2 mounted on one of the first and second spindles, and the remaining half of the magnetic heads Recording on the magnetic disk 2 installed on the other spindle.
Perform playback. For example, when the total number of magnetic heads in the floppy disk device having the above configuration is four, the magnetic head 32 and the upper magnetic head 38 record and reproduce data on and from the magnetic disk 2 mounted on the first spindle 22. The head 33 and the upper magnetic head 39 perform recording and reproduction on the magnetic disk 2 mounted on the second spindle 23.

Furthermore, in the embodiment described above, the center positions of all the magnetic heads described above are aligned with the rotation center lines of the first spindle 22 and the second spindle 23 when recording/reproduction on the magnetic disk 2 is possible. It is arranged so that it is located approximately within a plane containing. This is important in order to keep the azimuth of the information signal recorded on the magnetic disk 2 constant and to maintain compatibility between magnetic disks.

The operation of the floppy disk device configured as described above will be explained with reference to FIGS. 1 and 2.

The cartridge 1 is positioned at a predetermined position by a loading device (not shown), and the first or second spindle is engaged with the center hole (not shown) of a hub provided in the magnetic disk 2. - The hub is supported by the hub receiver 24 or 26. In conjunction with this movement, head arm 3
6 and 37 swing toward the magnetic heads 32 and 33, respectively, and are arranged between the magnetic head 32 and the upper magnetic head or head pad 38, or between the magnetic head 33 and the upper magnetic head or head pad 39. magnetic disk 2
The device is held in a state where information can be recorded and reproduced. When recording/reproducing information, the rotation of the spindle motor 26 is caused by the rotation of the first spindle 22 and the second spindle 23.
The driving force is transmitted to the magnetic disk 2, and the magnetic disk rotates at a predetermined number of rotations. In this case, the magnetic disk 2 does not necessarily need to be attached to both of the two spindles, and the spindles to which the magnetic disk 2 is not attached spin idly. Next, a controller (not shown) selects the magnetic disk 2 on which information is to be recorded/reproduced, and the head support 44
tl - To which magnetic disk 2 should the transfer be made?
That is, it is instructed whether to transfer the magnetic disk 2 mounted on the first spindle 22 or the magnetic disk 2 mounted on the second spindle 23. Instructions from the controller are given to the stepping motor 43, the stepping motor 43 rotates, the rotational motion is converted into linear motion, and the head support 44 is moved to the target position. When the magnetic head 32 or 33 stops at the desired position, the head support 4
4, information is recorded or reproduced through the magnetic head corresponding to one of the magnetic disks 2 selected by the controller, and the operation is completed. With the above operation, the position of the magnetic head changes, but as mentioned above, the center position of all magnetic heads is
It goes without saying that the grinding wheel is always positioned within a plane that includes the rotation centers of the first spindle 22 and the second spindle 23.

3 and 4 show the configuration of a floppy disk device according to a second embodiment of the present invention.As shown in FIG. 7, there is a floppy disk insertion slot on one side of the device, and two floppy disks In FIG. 3, reference numeral 1 denotes a cartridge having the same configuration as that commonly used, and has a magnetic disk 2 built therein. The two cartridges 1 are positioned at predetermined positions, and the first spindle 62 and the second spindle 6
3 are fitted into the center holes of the hubs provided on the magnetic disk 2, and the hubs are supported by the hub receivers, thereby coming into operation. Reference numeral 47 denotes a spindle motor, whose rotation is transmitted via a transmission belt 66 and a spindle pulley 5 fixed to the end of the first spindle 62.
4 and a spindle pulley 66 fixed to the end of the second spindle 63, respectively. 4 is a side view of the floppy disk device shown in FIG. 3, viewed from the direction indicated by arrow B. FIG.

Reference numeral 67 is used in common with the drive boolean IJ6a and is hung on the spindle pulleys 64 and 66, respectively.

The first spindle 62 and the second spindle 53 are substantially parallel to each other, so that the transmission belts 66 and 67 transmit rotation without twisting, while the two magnetic disks 2 are Supported in substantially parallel or coplanar positions.

In FIG. 3, 6o is a first magnetic head for recording and reproducing information on the magnetic disk 2 mounted on a first spindle 62, and 61 is a first magnetic head for recording and reproducing information on the magnetic disk 2 mounted on a second spindle 63. This is a second magnetic head that records and reproduces information on the magnetic head, and is mounted near both ends of a T-shaped head support 490 that is capable of reciprocating linear movement along a guide rod (not shown). The head support 49 is composed of a head carrier Fuji, a head arm, a pressure spring, etc., and the head arm holds an upper magnetic head or a head pad, and these functions and configurations are not the same as in the original. Head support 4 in the first embodiment of the invention
It is the same as 4 except for a part.

The essential difference between the head support 49 in this second embodiment and the head support 44 in the first embodiment is as follows.
In the first embodiment, when the center positions of all the magnetic heads are in a state where recording/reproducing to/from the magnetic disk 2 is possible, the center positions of all the magnetic heads are within a plane including the rotational center line of the first spindle 22 and the second spindle 23. However, in the second embodiment, this restriction is eliminated. Of course, in the second embodiment as well, all the magnetic heads must be arranged so that they are compatible in terms of azimuth and the like with respect to the magnetic disk 2 on which each magnetic head records and reproduces information.

In FIG. 3, 48 is a stepping motor for linearly reciprocating the head support 49, and the rotational motion is converted into a linear motion by a steel belt 60 wound in an α shape around a pulley 69 fixed to a rotating shaft. It constitutes a head transfer device that is

A series of operations of the floppy disk device configured as described above are similar to those of the floppy disk device in the first embodiment.

In the first and second embodiments, it is assumed that the head transfer device is composed of a pulley fixed to the rotating shaft of the stepping motor and a steel belt wound around the pulley in an α shape. However, the head transfer device may be constructed by a combination of a stepping motor and a lead screw, or a combination of a stepping motor and a cam.

Effects of the Invention As described above, the present invention includes a spindle motor, two spindles substantially parallel to each other driven by the spindle motor, and a system for transmitting the rotation of the spindle motor to the two spindles, respectively. A transmission belt, a head support body on which all of the plurality of magnetic heads are mounted, and a head transfer device for reciprocating the head support body T in a nearly linear manner, and half of the plurality of magnetic heads are
All recording and playback is performed on the magnetic disk attached to one of the book spindles, and the remaining half of the magnetic heads perform recording and playback on the magnetic disk attached to the other spindle. When the floppy disk device is built into the same device, the number of components of the floppy disk device can be reduced, and the overall size and weight of the device can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a floppy disk device according to a first embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a floppy disk device according to a second embodiment of the present invention. 4 is a front view of FIG. 3, FIG. 6 is a partially cutaway perspective view showing the configuration of a conventional floppy disk device, and FIGS. 6, 7, and 8 are each a floppy disk device. FIG. 1...Cartridge, 2...Magnetic disk, 22°62...First spindle, 23
．． 53...Second spindle, 26.47...
...Spindle motor, 2nd round, 28.56.57.
...Transmission belt, 32°33.50.51...
... Magnetic head, 43.48 ... Stepping motor, 44.49 ... Head support. Name of agent: Patent attorney Toshio Nakao and 1 other person
3 rlA, -One Sword One Doribuji 2---Nanaguma Enide (Sufu Figure 6

Claims (2)

[Claims] (1) a spindle motor; two spindles that are substantially parallel to each other and are driven by the spindle motor;
A transmission belt for transmitting the rotation of the spindle motor to each of the two spindles, a head support on which a plurality of magnetic heads are mounted, and a head transfer device for reciprocating the head support almost linearly. half of the plurality of magnetic heads record on and read from a magnetic disk mounted on one of the two spindles, and the remaining half of the magnetic heads are mounted on the other spindle. 1. A magnetic recording and reproducing device that performs recording and reproducing on and from a magnetic disk. (2) A patent claim characterized in that the center positions of all magnetic heads are substantially located within a plane containing the rotational center lines of the two spindles when the magnetic disk is in a state where recording and reproduction are possible. The magnetic recording and reproducing device according to item 1.