JPS6080187A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To attain the compatibility between a magnetic disk device and a floppy disk by using a cam which is driven by a motor that revolves a medium to give reciprocating linear motion to the carriage of a head in the radius direction of the medium. CONSTITUTION:A carriage 18 which supports a magnetic head 17 is supported movably by a guide rod 21, and the carriage 18 is energized toward a medium holder 20 by a spring 19. A guide pin unified with the carriage 18 has a contact with a cam 25. The cam 25 is fixed to a final gear which is driven by a pinion 23 unified with the holder 20 via a gear train. Therefore the revolution of the pinion 23 are decelerated and transmitted to the cam 25 when the holder 20 is revolved by a motor. Then the revolution of the cam 25 gives the reciprocating linear motion to the carriage 18 in the radius direction of the medium. Thus it is possible to give the compatibility to a magnetic disk device with a floppy disk having a head window opened linearly.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention 1d relates to a magnetic disk device for an external recording device of a computer such as a microcomputer or personal computer.

Conventional configuration and its problems A tape recorder or a floppy disk is generally used as an external recording device for a microcomputer, personal computer, or the like. However, the former has a disadvantage that the data transfer speed is lower than the latter, and it takes a long time to write and read data. On the other hand, the latter requires high precision for assembly and parts used, and as a drive source for moving the magnetic head.
Generally, it is a one-track type for reasons such as the need for a stepping motor. For this reason, some inexpensive magnetic recording devices are used that do not use a stepping motor, but instead use the same drive source as a driving source for transporting the magnetic head and as a rotational driving source for the magnetic recording medium. The configuration will be explained below with reference to FIGS. 1 to 4.

In the figure, reference numeral 1 denotes a magnetic head, which is fixed to a head support 2. As shown in FIG. The head support 2 is rotatably attached while being biased in one direction by a groove 3. Further, a media holder 7 is fixed to the spindle 5 of the motor 4. A spring 8 is inserted into the hole provided in the media holder 7.
．． A drive pin 10 is attached via a retainer 9 so as to be vertically movable. The drive pin 10 is connected to the magnetic recording medium 6
When the magnetic recording medium 6 is mounted, the motor 4 starts rotating the magnetic recording medium 6, and when the magnetic recording medium 6 rotates to a position facing the driving hole 6a provided in the magnetic recording medium 6, it fits into the driving hole 6a and applies rotational force to the magnetic recording medium 6. Further, a pinion 11 is integrally formed with the media holder 7, and the gear train decelerates the gear, and the final gear 12 meshes with the gear 13 integrally formed with the head support 2, and rotates once to drive the head. The support body 2 is rotated back and forth once.

In the magnetic disk drive having such a structure, the tracks written on the magnetic recording medium 6 are spiral-shaped, and the track positions are determined by the drive pins 10 and the drive holes 6a. Further, since the magnetic head 1 is required to perform arcuate motion, the head window 6b of the magnetic recording medium 6 must be provided in an arc shape.

However, the floppy disks currently widely used in the market are the 8-inch size one shown in Figure 5, and the 6-inch size floppy disk.
As shown in the figure, it is a 5-inch size disk called a mini floppy disk, and the head window 6a is linearly opened and wide, and the index hole 14a is wide.
, the hole called 14b is usually jaquera) 15a, 1
It is covered by 5b, and it is covered once per revolution)
15 a.

Since the dimensions are such that the holes 16a and 16b provided in the magnetic recording device 15b are located at the holes 16a and 16b, it is impossible to apply rotational force by the driving pin 10 as described above. "It requires the use of specially shaped magnetic disks that are incompatible with the widely used floppy disks, which are not only difficult to obtain, but also expensive. Another problem is that the drive pin 10 hooks the drive hole 6a and rotates it.
A is prone to wear and deformation, and due to this wear and deformation,
There was a problem that the track position (1/i) was shifted.

OBJECTS OF THE INVENTION An object of the present invention is to provide an inexpensive magnetic disk device that is compatible with magnetic disks that are widely used in the market.

Structure of the Invention The magnetic disk device of the present invention comprises: a meso-f-a holder for rotating a magnetic recording medium; a movable ramp mechanism for holding the magnetic recording medium between a fif-j media holder; and the media holder. a media base on which the magnetic recording medium that receives rotational force is placed; a pinion integrally formed at the bottom of the media holder; a gear train meshing with the front pinion; and an upper part of the final gear of the gear train. a cam attached to the cam, a magnetic head for recording and reproducing, a carriage for supporting the magnetic head, a spring for bringing the carriage into integral contact with a forming surface, supporting the carriage, and
It has a guide rod that guides the media holder for linear movement, and a motor that rotates the media holder, and is configured so that the magnetic head performs reciprocating linear movement, which makes it widely popular in the market. This makes it possible to make it compatible with Flo and P disks.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Fig. 7 is a perspective view of the overall appearance, Fig. 8 is a side view showing the internal mechanism with the main part cut away, and Fig. 9 is a perspective view showing the internal mechanism with the main part cut away and the carriage section removed. Figure, 1st
Figure 0 is a perspective view with the media cover removed, Figure 11 is the main figure showing the internal mechanism by removing the media cover and breaking off the main parts, and Figure 12 shows the arrangement of parts on the base. The perspective view and FIG. 13 are enlarged views of the area around the carriage from the media holder.

In FIGS. 7 to 13, reference numeral 17 denotes a magnetic head, which is fixed to a carriage 18. In FIGS. Carriage 18 is spring 1
9 in the direction of the media holder 20 and supported by the guide rod 21 . The carriage 18 is guided by a guide rod 21 and is movably provided. The media holder 20 is fixed to the spindle of a motor 22. Furthermore, a pinion 23 is integrally formed at the bottom of the media holder 20 and is meshed with a gear train. A cam 25 is attached to a part of the final gear 24 of the 1° h tonne row at the rotation point.

Guide pin 2 integrally formed on carriage 18
6 is biased against the outer peripheral surface of the cam 25, and the carriage 18 is moved by the rotation of the cam 26.

A slot arm 27 is attached to the carriage 18 by a spring.
It is biased in the clockwise direction and is mounted so that it can move up and down. Also, a band 28 is attached to the ζ arm 2 (a band 28 that presses the contact area between the IB disk and the magnetic head. The hub 29 is rotatable).
0 has been investigated. Further, the hub arm 30 is urged upward by a spring 31. The clamp shaft 32 is rotatably attached to the media cover 33,
A knob 35 for operating a claw 34 for lowering the hub arm 30 is attached to the tip of the hub arm 30 side. 36 is a magnetic recording medium, 37 is a base, 3
8 is a media base on which the magnetic recording medium 36 is placed.

The operation of the magnetic disk device of this embodiment configured as described above will be described below. Insert the magnetic recording media 36 and turn the knob 35 900 rotations clockwise from the horizontal position. J゛ and clamp shaft 32
The claw 34 fixed to one end of the hub arm 3 rotates, and the hub arm 3
0 is lowered, the hub 29 fits into the center hole of the magnetic recording medium 36, the magnetic recording medium 36 is sandwiched between the media holder 20 and the hub 29, and the magnetic recording medium 36 is rotated simultaneously with the rotation of the media holder 20. Rotate. Further, the band arm 27 also partially biases the no-pua. Next, the motor 22 is driven to rotate the media holder 20 and the magnetic recording medium 36. At the same time, the pinion 23 integrally formed at the bottom of the media holder 20 also rotates, and the meshing gear train transmits the deceleration to the cam 26, and the cam 25 rotates once, moving the carriage 18 toward the magnetic recording medium. Recording and playback are performed by making one reciprocating linear movement in the radial direction of the The recorded trunk is formed in a spiral shape and reproduces a spiral track.

As described above, according to this embodiment, by changing the movement method of the magnetic head from circular arc motion to linear motion, the magnetic disk device can be made compatible with floppy disks that are widely used in the market. has been realized.

Effects of the Invention As is clear from the above description, the present invention supports a carriage that supports a magnetic head by a guide rod, makes it movable while being guided, and biases the carriage in one direction toward the media holder with a spring. As a result, the guide pin formed integrally with the gear ridge is urged against the cam surface, and the rotation of the cam causes the carriage to perform reciprocating linear motion in the radial direction of the magnetic recording medium, driving the transfer of the magnetic head. Even in an inexpensive magnetic disk device in which the source and the rotational drive source for the magnetic recording media are the same, an excellent effect can be obtained in that it is possible to make it compatible with the floppy disks currently widely used in the market. . This effect provides the excellent effect that magnetic recording media can be obtained easily and at low cost.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a conventional magnetic disk device, Fig. 2 is a perspective view of media used in the conventional magnetic disk device, and Fig. 3 is a cross-section of the thick part of a conventional magnetic disk device, showing the internal mechanism. (I11 side view, Figure 4 is a plan view showing the arrangement of parts on the base of a conventional magnetic disk drive,
5 and 6 are front views of floppy disks that are currently widely used in the market, FIG. 7 is an overall external perspective view of a magnetic disk drive according to an embodiment of the present invention, and FIG. FIG. 9 is a side view showing the internal mechanism of a magnetic disk drive according to an embodiment of the present invention, with the main part cut away and the carriage portion removed. FIG. 10 is a perspective view showing a magnetic disk device according to an embodiment of the present invention with the media cover removed. Perspective view with the cover removed and the main parts broken to reveal the internal mechanism, No. 12
13 is a perspective view showing the arrangement of components on a base of a magnetic disk device according to an embodiment of the present invention, and FIG. 13 is an enlarged perspective view of the main parts of the magnetic disk device according to an embodiment of the present invention. 17... Magnetic head, 18... Carriage, 19... Spring, 2o... Media holder, 21... Guide rod, 22...・
...Motor, 23... Binion, 24...
...Final gear, 25...Cam, 26...
...Guide pin, 27...Pad arm,
28...Pad, 29...Hub, 30.
...Hashi arm, 31... Spring, 32.
...Clamp shaft, 34...Claw, 3
6... Magnetic recording media, 38... Media base. Name of agent: Patent attorney Toshio Nakao and one other person
1 Figure 3 Figure 4 ε97 diagram? 7 Figure 8 Figure 9 Figure 2, jl Figure 11 q J'/ Figure 12 Figure 13 J/

Claims (1)

[Claims] A media holder that rotates a magnetic recording medium, a movable ramp mechanism that clamps the magnetic recording medium between the media holder, and a medium on which the magnetic recording medium is placed that receives rotational force from the media holder. A base, a pinion integrally formed at the bottom of the media holder, a gear train meshing with the pinion, a cam mounted on the top of the final gear of the gear train, and a magnetic field for recording/11) recording. a carriage for supporting the magnetic head; a guide pin integrally formed with the carriage; a spring for bringing the guide pin into contact with the cam surface; A magnetic disk device comprising a guide rod that guides the media holder for movement and a motor that rotates the media holder.