JPH0341340Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a winchiesta type fixed magnetic disk device, etc., which is configured to record or reproduce information signals by rotating a plurality of disks simultaneously by a common disk rotation mechanism. The present invention relates to a disk device.

Prior Art As shown in FIG. 1, a general winchiesta type fixed magnetic disk device rotates a plurality of hard disks 1 and 2 simultaneously by a common disk rotation mechanism 3, and each disk 1 and 2 serves as a recording medium. It is constructed so that recording or reproduction is performed using magnetic heads 4, 5, 6, and 7 that are disposed facing each other on one surface 1a, 2a and the other surface 1b, 2b, respectively. Note that the disks 1, 2, head block 8, etc. are enclosed in a dustproof container (not shown). Therefore, it is virtually impossible to attach and detach the disks 1 and 2 from the spindle after the container is sealed.

The head block 8 is connected to a radial feed mechanism 9 for feeding the head positioning mechanism, i.e. the heads 4, 5, 6, 7 in the radial direction of the disks 1, 2. The disk moves in the radial direction according to the drive of the disk.

The head block 8 has three holders 10, 11, 12 connected to each other with screws (not shown) and a first
~Fourth head assembly 13, 14, 15, 1
It consists of a combination of 6. Head assembly 13
As is clear from FIGS. 2 and 3, the head 4 is fixed to one end of a head support 17 made of a plate spring, and a cylindrical engagement protrusion 18 is provided at the other end. In addition, in order to reduce costs, other head assemblies 14, 15, and 16 are also shown in FIGS. 2 and 3.
The structure is exactly the same as the head assembly 13 shown in the figure. The attachment of the head assemblies 13 to 16 to the holders 10 to 12 is as follows.
This is achieved by inserting the projections 18 of each head assembly 13-16 into the holes 19, 20, 21 provided in the head assembly 2 and crimping them.

By the way, the second and third head assemblies 1
4 and 15 are fixed to a common hole 20 of a common holder 11 by caulking. Therefore, the distance C between the lower surface 1b of the first disk 1 and the upper surface 2a of the second disk 2 is the distance A from the upper surface of the head 5 to the rising surface of the protrusion 18, and the height B of the protrusion 18. The sum (A
+B) is at least twice as necessary. For this reason, it becomes difficult to reduce the thickness of a winchiesta type fixed magnetic disk device that includes a large number of disks coaxially.

Purpose of the invention Therefore, the purpose of the present invention is to provide a disk device that can be made thinner.

Structure of the invention To achieve the above object, the present invention will be described with reference to the reference numerals in the drawings showing the embodiments.
simultaneously rotate the plurality of disks 1,
Heads 4, 5, 6, on one side and the other side of 2.
In a disk device configured to record or reproduce information signals by facing each other, a pair of heads 5 and 6 disposed between the plurality of disks 1 and 2 are connected to the disks 1 and 2. The head supports 17 are respectively attached to the distal end portions of a pair of head supports 17 extending in the radial direction in the form of arms, and the pair of head supports 17 are supported at different positions on the holder 11. head support 17
The heads 5 and 6 are arranged so that some of them overlap with each other and the remaining parts do not overlap with each other, and the pair of heads 5 and 6 relate to a magnetic disk device in which the heads 5 and 6 are offset from each other in the circumferential direction of the disks 1 and 2.

Functions and Effects of the Invention In the present invention, the pair of heads 5 and 6 are slightly shifted in the circumferential direction of the disk within a range that maintains the overlapping of the pair of arm-shaped head supports 17, thereby achieving thinning. Therefore, the pair of heads 5, 6
deviation from the track can be reduced. That is, the ideal position of the heads with respect to the circumferential track of the disks 1 and 2 is one place, and if the pair of heads 5 and 6 are offset in the circumferential direction, it is not possible to arrange both heads at the ideal position. If the distance (displacement) between the pair of heads 5 and 6 increases, the yaw angle will increase, which is unfavorable for recording and reproduction. However, in the present invention, since the pair of heads 5 and 6 are shifted within a range that maintains the mutual overlap of the pair of head supports 17, the displacement of the heads 5 and 6 and the yaw angle are small, and the recording and reproducing performance is not degraded. few.

Embodiment Next, a fixed magnetic disk device according to an embodiment of the present invention will be described with reference to FIGS. 4 to 6.
However, since the parts indicated by reference numerals 1 to 21 in FIGS. 4 to 6 are substantially the same as those indicated by the same reference numerals in FIGS. 1 to 3, their explanation will be omitted. In this embodiment, as is clear from FIGS. 5 and 6, the holder 11 is provided with two mounting holes 20a and 20b, and the second and third head assemblies 14 and 15 are
are attached to the disks 1 and 2 so as to be offset from each other in the circumferential direction. That is, the protrusions 18 of the second and third head assemblies 14 and 15 are not inserted into the common hole, but into independent holes 20a and 20b, and are fixed by caulking.

Therefore, according to this embodiment, the holes 20a, 20b
It is no longer necessary to set the depth to more than twice the height B of the protrusion 18 shown in FIG. C can be made smaller.

Modifications The present invention is not limited to the embodiments described above, and the following modifications are possible, for example.

(A) Instead of fixing the protrusions 18 to the holes 20a and 20b by caulking, they may be fixed using an adhesive or other fixing member.

(B) Although the embodiment shows an apparatus including two disks 1 and 2, it is of course applicable to an apparatus including more disks.

(C) If the spacing C is limited by mutual interference between the second and third heads 5, 6,
The thickness of the disks 1 and 2 may be reduced by shifting the positions of the heads 5 and 6 in the circumferential direction of the disks 1 and 2 to prevent collision between the disks 1 and 6.

(D) The present invention is not limited to fixed magnetic disk devices, but can also be applied to recording or reproducing disk devices with similar configurations.

(E) In the embodiment, the holes 19, 20a, 20b, 21 and the protrusion 18 are circular, but the holes 19, 20a, 20b, 21 may be polygonal in order to achieve good caulking. Alternatively, a protrusion may be provided on the inner peripheral surface of the hole.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a part of a conventional fixed magnetic disk device, Fig. 2 is a plan view showing a head assembly, Fig. 3 is a front view of the head assembly shown in Fig. FIG. 5 is a sectional view showing a part of the fixed magnetic disk device according to the embodiment, FIG. 5 is a plan view showing the relationship between the second and third head assemblies of the device shown in FIG. 4, and FIG. FIG. 1, 2... Disk, 3... Disk rotation mechanism, 4, 5, 6, 7... Head, 8... Head block, 9... Radial direction feeding mechanism, 10, 11,
12... Holder, 13, 14, 15, 16... Head assembly, 17... Support body, 18... Projection, 20a, 20b... Hole.

Claims (1)

[Claims for Utility Model Registration] A plurality of disks 1 and 2 are simultaneously rotated by a common disk rotation mechanism, and heads 4 and 5 are provided on one surface and the other surface of the plurality of disks 1 and 2. . a pair of radially arm-like head supports 1 and 2;
The pair of head supports 17 have mounting protrusions 18.
The projections 18 of the pair of head supports 17 are inserted into and supported by mounting holes 20a and 20b formed at mutually shifted positions in the holder 11, and when viewed from above, The head supports 17 of the pair are arranged such that a part thereof overlaps each other and the remaining parts do not overlap each other, and the heads 5 and 6 of the pair are offset from each other in the circumferential direction of the disks 1 and 2. Characteristic disk device.