JPH0445170Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Purpose of the invention" (Field of industrial application) The invention enables recording and reproduction by selectively switching the number of head elements corresponding to the recording tracks of a flexible magnetic disk. It relates to a flexible magnetic disk recording and reproducing device, and in particular, a flexible magnetic disk is attached to a fixed multi-element magnetic head during recording and reproducing.
The present invention relates to a flexible magnetic disk recording/reproducing device which allows reliable contact without causing track deviation or the like.

(Prior Art) Conventional flexible magnetic disk recording and reproducing apparatuses have configurations as shown in FIGS. 6 to 9, for example.

This conventional device includes a fixed multi-element magnetic head 2 that performs recording and reproduction by selectively switching the number of head elements 2a corresponding to the number of recording tracks on a flexible magnetic disk 1, and 2
It is comprised of a pad mechanism 3 and the like for bringing the flexible magnetic disk 1 into contact with the disk.

As shown in FIG. 9, the pad mechanism 3 described above is provided with a plurality of divided pads 3a to 3d for bringing the flexible magnetic disk 1 into contact with the fixed multi-element magnetic head 2. . This split pad 3
A to 3d are configured to be able to be operated independently by operating mechanisms having solenoids and the like, and correspond to the head element 2a that performs recording or reproduction among the head elements 2a of the fixed multi-element magnetic head 2. For example, the pad 3a was actuated to bring the flexible magnetic disk 1 into contact.

(Problems to be Solved by the Invention) However, in the above-mentioned conventional device, on the upper surface side of the flexible magnetic disk 1, there are divided pads 3a to 3a.
3d and an operating mechanism including a solenoid for operating its divided pads, the structure made it impossible to record and reproduce data using both sides of the flexible magnetic disk 1. Further, since the operating mechanism is installed on the upper surface side of the flexible magnetic disk 1, there is a drawback that the entire flexible magnetic disk recording/reproducing apparatus becomes large in the height direction. Furthermore, the split pad 3a
In order to operate the pads 3d to 3d independently, it is necessary to have as many operating mechanisms as the number of divided pads, such as solenoids, making it difficult to reduce costs.

The present invention was developed in view of the above points, and its purpose is to use a drive source such as a solenoid to drive a recording/reproducing head element among the head elements of a fixed multi-element magnetic head. It is an object of the present invention to provide a flexible magnetic disk recording/reproducing device which allows a flexible magnetic disk to be brought into contact with the disk and also enables double-sided recording/reproducing.

"Structure of the invention" (Means for solving the problem) The flexible magnetic disk recording/reproducing apparatus according to the invention has a number of head elements corresponding to the number of recording tracks of the flexible magnetic disk, and A fixed multi-element magnetic head that performs recording and reproduction by selectively switching head elements, a guide, and a pad disposed opposite the guide to sandwich the flexible magnetic disk between the guide and the guide. The guide has a surface that contacts the flexible magnetic disk in an arc shape in the radial direction of the flexible magnetic disk, and the guide has a surface that contacts the flexible magnetic disk in an arc shape in the radial direction of the flexible magnetic disk, and the guide has a surface that contacts the flexible magnetic disk at a predetermined interval on both sides of the fixed multi-element magnetic head. A multi-element magnetic head is arranged in the radial direction and rotationally displaced toward the center or outer circumference of the flexible magnetic disk using the apex of the arcuate surface as a stationary point, thereby fixing the flexible magnetic disk. The problem is solved by making the head element come into contact with an arbitrary position of the head element.

(Function) Among the head elements of a fixed multi-element magnetic head, the guide is rotated to the position of the head element that performs recording and reproduction, and the flexible magnetic disk is sandwiched between the guide and the pad. A flexible magnetic head can be brought into contact. Furthermore, by configuring as described above, it is possible to record and reproduce data on both sides of a flexible magnetic disk.

(Example) An example of a flexible magnetic disk recording/reproducing apparatus according to the present invention will be described based on FIGS. 1 to 5.

First, a first embodiment of this invention shown in FIGS. 1 to 4 will be described.

In the figure, reference numeral 11 denotes a flexible magnetic disk having a plurality of recording tracks, which is clamped by a magnetic disk select plan mechanism (not shown) and rotated clockwise at a constant speed. Reference numeral 12 denotes a first semicylindrical fixed multi-element magnetic head disposed on the lower surface side of the flexible magnetic disk 11 in the radial direction of the disk.
The flexible magnetic disk 11 has a number of head elements corresponding to the number of recording tracks on the lower surface side of the flexible magnetic disk 11, and these head elements are selectively switched to perform recording and reproduction on the lower surface side of the flexible magnetic disk 11. Reference numeral 13 denotes a semicylindrical second fixed multi-element magnetic head arranged in the radial direction of the disk on the upper surface side of the flexible magnetic disk 11, and corresponds to the number of recording tracks on the upper surface side of the flexible magnetic disk 11. It has a number of head elements, and these head elements are selectively switched to record on the upper surface side of the flexible magnetic disk 11.
It performs regeneration.

As shown in FIGS. 1 and 4, the first fixed multi-element magnetic head 12 and the second fixed multi-element magnetic head 13 are composed of a flexible magnetic disk 11,
They are arranged parallel to each other at intervals on the upper and lower surfaces of the

Reference numeral 14 denotes a guide which is rotatably displaced to the position of the head element of the two magnetic heads 12 and 13 which is to be used for recording and reproduction, and brings the flexible magnetic disk 11 into contact therewith. In this guide 14,
Magnetic gap forming surface 1 of both magnetic heads 12 and 13
2a, 13a and both magnetic heads 12, 1
Bifurcated guide portions 14a are provided on both sides of 3. Arc-shaped contact surfaces 14b that come into contact with the lower surface of the flexible magnetic disk 11 are formed on the upper surface of the guide portions 14a, respectively. Furthermore,
The lower surface of the bifurcated guide portion 14a has an arcuate slide surface 1 in the opposite direction to the arc of the contact surface 14b.
4c is formed. This sliding surface 14c
is slidably placed on an arc-shaped guide surface 15a formed on the lower magnetic head mounting base 15, and is attached between the side wall of the guide portion 14a and the side wall of the magnetic head mounting base 15. It is pressed against the guide surface 15a by a spring 16. When the sliding surface 14c slides on the guide surface 15a on which it is placed, it takes one point of the arc-shaped contact surface 14a as a stationary point A, and from that stationary point A as a base point, it moves toward the center of the flexible magnetic disk 11, Alternatively, the guide portion 14 can be slid in the outer circumferential direction to swing the entire guide portion 14.

Reference numeral 17 denotes a lever, which is connected to the bifurcated guide portion 1 described above.
Integrally (or fixedly) to one lower end of 4a
It is connected by a lever pin 19 to a drive mechanism 18 that swings the guide 14.

The drive mechanism 18 includes a fixed rack 18a, a movable rack 18b, and an operating rod 20 of a solenoid 20.
Pinion gears 18c and 18d are directly connected to the racks a and 20b so as to be rotatable and are arranged between the two racks.
and a long hole 1 formed in a direction perpendicular to the moving direction of the moving rack 18b and into which the lever pin 19 is inserted.
8f and a connecting member 18g fixed on the moving rack 18b.

Reference numeral 21 denotes a pad disposed on the upper surface side of the flexible magnetic disk 11, and the flexible magnetic disk 11 is sandwiched between the pad and the contact surface 14b of the guide 14, and the flexible magnetic disk 11 is held between both magnetic heads 12. ,1
3. Therefore, this pad 21 is provided on the upper magnetic head mounting base 22 at a position facing the contact surface 14b of the guide 14.

As shown in FIGS. 2 and 3, the above-mentioned pad 21 is attached using arc-shaped plate springs on both sides of the lower surface of the upper magnetic head mounting base 22, which are similar to the contact surface 14b of the guide 14. 23 are provided, and pads 21 are attached to the lower surfaces of both leaf springs 23, respectively.

The upper magnetic head mounting base 22 is designed so that when the flexible magnetic disk 11 is removed from the magnetic disk center clamp mechanism or when clamping is performed, it can be moved to another position where it will not interfere with the work. When the first fixed multi-element magnetic head 12 or the second fixed multi-element magnetic head 13 performs recording and reproduction on the flexible magnetic disk 11, the magnetic head 11 is configured as shown in FIGS. 2 to 4. It is constructed so that it can be set on the top surface of the flexible magnetic disk 11.

Note that the installation position of the magnetic gap forming surface 12a of the first fixed multi-element magnetic head 12 disposed on the lower surface side of the flexible magnetic disk 11 is as shown in FIG. The disc is located at a position slightly rearward from the top of the arc with which it contacts in the direction of rotation. On the other hand, the installation position of the magnetic gap forming surface 13 of the second fixed multi-element magnetic head 13 disposed on the upper surface side of the flexible magnetic disk 11 is such that the position of the magnetic gap forming surface 13 of the second fixed multi-element magnetic head 13 is It is located slightly forward and away from the top of the arc where it touches.

By configuring as described above, recording and reproduction can be performed on the flexible magnetic disk 11 as follows.

Hereinafter, for convenience, the first fixed multi-element magnetic head 12 disposed on the lower side corresponds to the number of recording tracks in three track groups of the inner peripheral part, central part, and outer peripheral part of the lower surface of the flexible magnetic disk 11. A case where recording or reproduction is performed by dividing the head element into several head element groups will be explained.

First, when recording or reproducing on the track group in the center of the lower surface of the flexible magnetic disk 11, the solenoid 20 is not activated and the bifurcated guide portion 14 is
As shown in FIG. 2, the stationary point A at the center top of the arc-shaped contact surface 14b formed at A is located at the center of the lower surface of the flexible magnetic disk 11, and the upper surface side of the flexible magnetic disk 11 is The flexible magnetic disk 11 is sandwiched between a pair of pads 21 arranged facing each other, and the surface wobbling of the magnetic disk 11 is suppressed, and the head of the central portion of the first fixed multi-element magnetic head 12 is It is brought into contact with the element group, and the contact pressure and contact area are maintained at values that enable high-density recording and reproduction. Next, the flexible magnetic disk 11
When recording or reproducing on a group of tracks on the outer periphery of the lower surface, the solenoid 20 is caused to perform a suction operation toward the outer periphery of the flexible magnetic disk 11. Then, the pinion gears 18c and 18d rotatably attached to the tips of the operating rods 20a and 20b of the solenoid 20 move toward the outer circumference of the flexible magnetic disk 11 while rotating clockwise on the fixed rack 18a. .

Due to the rotational movement of the pinion gears 18c and 18d, the moving rack 18b slides toward the outer circumference of the flexible magnetic disk 11. By the sliding movement of the movable rack 18b, the lever pin 19 is moved from the position shown in FIG. 2 to the position shown in FIG. The surface 14b is rotationally displaced to the outer periphery of the flexible magnetic disk 11. Due to this rotational displacement of the contact surface 14b, the position where the flexible magnetic disk 11 is sandwiched between the pad 21 is displaced to the outer peripheral portion. Therefore, the head element source corresponding to the outer circumferential portion of the first fixed multi-element magnetic head 12 can be brought into contact with the outer circumferential portion of the lower surface of the flexible magnetic head 11, and the contact pressure and the contact area are expressed as follows. It can be held at a value that allows high-density recording and reproduction.

Furthermore, when recording or reproducing on the track group on the inner circumferential portion of the lower surface of the flexible magnetic disk 11, the solenoid 20 is pulled in the inner circumferential direction of the flexible magnetic disk 11, contrary to the above case. By doing so, the contact surface 14b of the guide 14 is rotationally displaced to the inner circumferential portion of the flexible magnetic disk 11, and the sandwiching position of the flexible magnetic disk 11 is displaced to the inner circumferential portion by the pads 21. do. Therefore, a group of head elements corresponding to the inner circumferential portion of the first fixed multi-element magnetic head 12 can be brought into contact with the inner circumferential portion of the lower surface of the flexible magnetic disk 11, and the contact pressure and the contact area are can be maintained at a value that allows high-density recording and reproduction. In this manner, the flexible magnetic disk 11 is moved between the flexible magnetic disk 11 and the pad 21 by rotating the guide 14 to the position of the head element to be used for recording or reproducing among the head elements of the first fixed multi-element magnetic head 12. It is possible to suppress surface wobbling of the flexible magnetic disk 11 by sandwiching it therebetween, and also to bring a group of recording or reproducing head elements into contact with the flexible magnetic disk 11.

Furthermore, by the second fixed multi-element magnetic head 13 attached to the upper magnetic head mounting base 22,
When recording and reproducing data on the upper surface side of the flexible magnetic disk 11, it can be achieved by the operations of the respective parts similar to those of the first fixed multi-element magnetic head 12 described above.

Next, a second embodiment of the flexible magnetic disk recording/reproducing apparatus according to the present invention, shown in FIG. 5, will be described.

Note that the same parts as in the first embodiment described above are indicated by the same reference numerals.

In this second embodiment, the flexible magnetic disk 1
This shows a case where recording and reproduction are performed only on one side of the disc, for example, the bottom side. In this case, a feature of the structure is that a wide pad 24 is provided on the upper surface side of the flexible magnetic disk 11.

Therefore, the contact surface 14a of the guide 14 and the pad 2
A flexible magnetic disk 11 is sandwiched between the
The operations of suppressing the surface wobbling of the magnetic disk and bringing the group of recording or reproducing head elements into contact with the flexible magnetic disk 11 are the same as in the first embodiment described above.

"Effects of the Invention" The flexible magnetic disk recording and reproducing apparatus according to the present invention has a number of head elements corresponding to the number of recording tracks of the flexible magnetic disk, and these head elements can be selectively switched. A fixed multi-element magnetic head for recording and reproducing information, a guide, and a pad disposed opposite to the guide to sandwich the flexible magnetic disk between the guide and the magnetic disk.
The guide has a surface that contacts the flexible magnetic disk in an arc shape in the radial direction of the flexible magnetic disk,
They are arranged in the radial direction of the flexible magnetic disk at a predetermined interval on both sides of the fixed multi-element magnetic head, and the apex of the arcuate surface is set as a stationary point toward the center or the outer circumference of the flexible magnetic disk. Since the flexible magnetic disk is rotatably displaced by the drive mechanism and brought into contact with an arbitrary position of the head element of the fixed multi-element magnetic head, the flexible magnetic disk can be moved while the fixed multi-element magnetic head remains fixed. The flexible magnetic disk can be held between the guide and the pad to suppress surface wobbling and the fixed multi-element magnetic head can be brought into contact with it, and furthermore, it is possible to record and play back on both sides of the flexible magnetic disk. It has excellent features such as high density, multi-channel, and miniaturization.

[Brief explanation of the drawing]

1 to 5 show an embodiment of a flexible magnetic disk recording and reproducing apparatus according to the present invention, in which FIG. 1 is a partially cutaway perspective view showing the main components, FIG. Figure 3 is a side view showing the positional relationship between the guide and pad, and Figure 4 is Figure 2A-
A sectional view taken along line A' and FIG. 5 are perspective views of essential parts showing the relationship between the guide and the pad. 6 to 9 show a conventional example. FIG. 6 is a side view showing the main components, and FIGS. 7 and 8 show a fixed multi-element magnetic head and a flexible magnetic disk. FIG. 9 is a perspective view and a plan view showing the relationship, and FIG. 9 is a side view showing the relationship between the pad, the flexible magnetic disk, and the fixed multi-element magnetic head. DESCRIPTION OF SYMBOLS 11... Flexible magnetic disk, 12... First fixed multi-element magnetic head, 13... Second fixed multi-element magnetic head, 14... Guide, 14a... Guide portion, 14b... Contact surface, 14c...slide surface, 18...drive mechanism, 21, 24...pad.

Claims (1)

[Claims for Utility Model Registration] (1) A fixed multi-element magnetic device that has a number of head elements corresponding to the number of recording tracks on a flexible magnetic disk and that performs recording and reproduction by selectively switching these head elements. A head, a guide, and a pad disposed opposite to the guide to sandwich the flexible magnetic disk between the guide, the guide having a surface in contact with the flexible magnetic disk. The flexible magnetic disk has an arc shape in the radial direction, and is arranged in the radial direction of the flexible magnetic disk at a predetermined interval on both sides of the fixed multi-element magnetic head, and the apex of the arc-shaped surface is set as a stationary point. As a result, the flexible magnetic disk is rotationally displaced in the center direction or the outer circumferential direction by a drive mechanism,
1. A flexible magnetic disk recording/reproducing apparatus characterized in that the flexible magnetic disk is configured to abut on any position of a head element of a fixed multi-element magnetic head. (2) A fixed multi-element magnetic head has a number of head elements corresponding to the number of recording tracks on one side of a flexible magnetic disk, and these head elements are selectively switched to control the recording of the flexible magnetic disk. A first fixed multi-element magnetic head for performing recording and reproduction on one side, and a number of head elements corresponding to the number of recording tracks on the other side of the flexible magnetic disk,
Claim 1 of the Utility Model Registration characterized by comprising a second fixed multi-element magnetic head that selectively switches these head elements to perform recording and reproduction on the other side of the flexible magnetic disk. The flexible magnetic disk recording and reproducing device described above.