JPS6163991A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To obtain a fixing mechanism as well as a seal of a dust cover which reduce the width of a magnetic disk device with simple constitution and without imparing a head positioning error, by using two parts to form a seal groove. CONSTITUTION:A seal groove is formed with a base 3 to which a spindle 1 and a carriage 2 are fixed and a bracket 9 having an L-shaped section at the base outer circumference. Then silicone rubber is supplied into the seal groove before a cover 6 is attached. This rubber is turned into an elastic matter and functions as a seal member. Therefore no stress if produced at a seal part and the high size accuracy is not required to the cover 6 nor the base 3. Furthermore, a stud 10 is put close to the inner surface of the cover 6 and serves as a guide. In such a way, the number of assembling processes can be decreased for a magnetic disk device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic disk group e, and more particularly to a magnetic disk drive having a dustproof cover, a base knob, and a fixed mechanism.

[Background of the invention]

In the conventional magnetic disk drive, as shown in Fig. 1 and Section 2, a seal #I4 is installed on a base 3 on which a spindle 1 and a carriage 2 are mounted, and a seal 5 is positioned, and a dust-proof cover 6 is screwed in several places on the base 3. However, in such devices, the base 3 is often made of aluminum casting, and the seal groove 4, which has a complicated shape, is attached to the outer periphery of the base 6. It is integrally formed with a cast metal part. This structure has the disadvantage that the width of the device becomes large. Magnetic disk drives are becoming smaller and larger in capacity, and in disk drives intended for use in specified storage racks such as 19-inch racks, the diameter of the disk disk has to be reduced due to the wide seal structure. This had the drawback of a smaller comb and lower storage capacity.

Therefore, in order to reduce the width of the installation, there are examples of improvements as shown in FIG. 3. The packing 5 is positioned with respect to the base 5Vc using adhesive tape, etc., and the cover thickness near the disk disc is thinly cut using an IQ machine, etc., and the four corners of the dustproof cover 6 are fixed to the base 6 with screws to perform a seal. In such a device, the seal 5 cannot be bent sufficiently, so the sealing surfaces of the cover and base must be finished with high accuracy by machining, which is expensive. Furthermore, the cover 6 that encloses the plurality of disks has a higher bending rigidity than the base 5VC, and the bending reaction force of the gasket between the cover tightening screws deforms the base, resulting in a head positioning error. becomes.

[Purpose of the invention]

An object of the present invention is to eliminate the problems of the prior art, and to provide a sealing and fixing mechanism for a dustproof cover that has a simple structure, does not impair head positioning errors, and reduces the width of the device. .

[Summary of the invention]

The width of the device is reduced by forming a seal I on the surface perpendicular to the 7-round surface that extends in the width direction of the device, which has been done in the past. The seal structure is formed by using silicone rubber, which hardens into a rubber elastic body when it reacts with moisture.

(Example of the invention) An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 85 is a plan view of the magnetic disk device according to this embodiment, and FIG. 6 is a cross-sectional view of FIG. 5.

In the figure, 5 is a base that fixes the spindle 1 and the carriage 2, and the base size for the disc plate 8 is made 2 to 4 m larger than the diameter of the disc plate 8.The outer periphery of the base is covered with a dustproof cover. Acts as a guide for the inner surface of 6. A bracket 9 having an L-shaped cross section on the outer periphery of the base is screwed into the lower surface of the base 5, and the base 3 and the bracket 9 form a sealing groove. On the other hand, three studs 10 are provided on the base 3 and are screwed onto the top surface of the cover 6 for positioning in the height direction. Before inserting the cover 6IiL, a liquid sealing material, for example, a rubber containing Anrico/2 is poured into the sealing groove. This type of rubber is usually in liquid form, and when poured into the sealing area, it reacts with a slight amount of moisture in the air and becomes a rubber elastic body within a few hours, acting as a sealing material. Therefore, the sealing groove formed by the base 3 and the bracket 9 positions the cover 6, and the sealing material wraps around the gap and becomes a rubber elastic body after hardening and acts as a packing. Therefore, stress is not generated in the seal portion, and the cover and base are not required to have high dimensions fIv.

Further, the cover 6 and the bracket 9 can be formed by thin plate drawing, and the dimensions for the /-ru can be made sufficiently small. Furthermore, the disc disc 8 and the cover 6! , it becomes difficult to insert the V-shaped cover 6 during assembly when the stud 10 becomes narrower.
By arranging it near the inner surface of the cover and making it an loid, the number of assembly steps is reduced.

〔Effect of the invention〕

As described above, according to the present invention, since the seal is formed by two parts including the seal and the Mt, a deep and narrow monument can be easily obtained, and the width of the device can be reduced. Furthermore, since the liquid 7-ru is cured to form a rubber elastic body, stress that would bend the base is not generated in the seal groove, and head positioning accuracy will not be deteriorated by attaching the cover.

[Brief explanation of drawings]

FIG. 1 is a schematic structural diagram of a conventional magnetic disk device, and FIG. 2 is a cross-sectional view of FIG. 1. FIG. 3 is a structural diagram of another application example of the device according to the prior art, and FIG. 4 is a cross-sectional view of FIG. 3. FIG. 5 is a plan view of a magnetic disk device according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view of FIG. 5. 1... Spindle 2 River gear 6...
・Base 4... Seal groove 5... Packing 6... Cover 7... Cover fixing screw 8... Disc disc 9... Bracket 1o... Stand 11... RTV rubber 12 ...Bracket fixing screw. γ (...Representative Patent Attorney Akio Takahashi ~ 1st Figure 7, 7th Zz 3rd Figure Kaya Figure

Claims (1)

[Claims] Consists of a base on which the spindle and carriage are mounted, a dustproof cover that seals it, a bracket that forms a sealing groove around the base, an adhesive sealed in the sealing groove, and a stud that connects the base and the dustproof cover. A magnetic disk device characterized by having a small seal space and preventing deformation of the base due to attachment of a dustproof cover.