JPH04132068A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent the projection of a seal member to the outside without fail and to improve seal by providing a seal pressure supporting the seal member on a housing main body or the abutting surface of a cover with a trimming part and restraining the projection of the seal member. CONSTITUTION:A housing main body 21 is formed like a shallow vessel shape forming approximately rectangle, and a trimming part 21A forming a seal groove 4 is provided on the abutting surface with the cover. On the abutting surface with the cover, a pair of seal pressures 21B are formed projecting upward while positioned on the identical plane with both right and left sides of the housing main body 21. In this case, respective seal pressures 21B are formed like the approximately rectangular thin plate to support respective long parts 5A of a gasket 5 with the trimming part 21A. Thus, the projection of the seal member 5 can be prevented without fail.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a magnetic disk device, and more particularly to a magnetic disk device whose interior is sealed using a sealing member such as a gasket. [Prior Art] A conventional magnetic disk device is shown in FIGS. 5 to 7. In the figure, l designates a housing that is the main body of the magnetic disk device, and the housing 1 is abutted against a housing main body 2 formed in the shape of a shallow rectangular container, and the housing It consists of a cover 3 that covers the main body 2 from above, and the abutting surface of the housing main body 2 is provided with an edging part 2A formed so as to border the entire circumference of the upper surface side of the housing main body 2. There is. The edge portion 2A opens to the outside of the housing 1 between the housing body 2 and the cover 3, and forms a seal groove 4 having a U-shaped cross section. Reference numeral 5 indicates a gasket as a sealing member installed in the seal groove 4, and the gasket 5 is made of an elastic material and has a pair of elongated portions 5A as shown in FIG. 5A and a pair of short portions 5B, 5B, it is formed into a substantially rectangular frame shape, and is adapted to fit into the edge portion 2A of the housing body 2 from the outside. And the gasket 5
is sandwiched between the housing body 2 and the cover 3 in the seal groove 4 as shown in FIG. 5, and seals the inside of the housing 1 to prevent dust from entering the housing 1. There is. Reference numeral 6 indicates a disk drive motor located inside the housing 1 and provided at the bottom of the housing body 2, and a magnetic disk 8.8 is connected to the rotating shaft (not shown) of the drive motor 6 via a clamp member 7 or the like. are fixed, and each magnetic disk 8 is rotated at high speed by a drive motor 6. Further, information recording surfaces are formed on both the upper and lower surfaces of each magnetic disk 8, and information is written and read by each magnetic head 12, which will be described later. Reference numeral 9 denotes a swing arm type magnetic head moving mechanism provided on the bottom of the housing body 2 and radially spaced apart from each magnetic disk 8. Driven by the motor section 11, the magnetic heads 12.12. . . are sought in the approximately radial direction along the recording surface of each magnetic disk 8. Sarani, 13.13. . . . indicate bolts for fastening the cover 3 onto the housing body 2, and each bolt 13 is inserted into a screw hole 14, 14, . . . formed at the four corners of the housing body 2.・
It is designed to be screwed onto the cover 3 from the upper side. In this oil-based magnetic disk drive, the gasket 5 is attached to the edge 2A of the housing body 2 from the outside in the direction of the arrow shown in FIG. By screwing the bolts 13 into each screw hole 14, the gasket 5 is sandwiched between the seal groove 4 of the housing body 2 and the cover 3, and the inside of the housing 1 is sealed, thereby preventing external dust etc. from entering. We are trying to prevent this. When the magnetic disk device is used, each magnetic disk 8 is rotated at high speed by the disk drive motor 6, and the magnetic head moving mechanism 9 is driven by the motor section 11 to move each magnetic head 12 onto the recording surface of each magnetic disk 8. seek,
Information is written to and read from the recording surface of each magnetic disk 8. [Problems to be Solved by the Invention] By the way, in the above-mentioned conventional technology, the gasket 5 is attached to the edge portion 2A of the housing body 2 from the outside, and the cover 3 is tightened from above with each bolt 13 to close the housing body 2. A gasket 5 is installed in the seal groove 4 between the
When each bolt 13 is tightened, the gasket 5 is compressed and deformed between the abutting surfaces of the housing body 2 and the cover 3, and the gasket 5 is partially inserted into the seal groove 4. Sometimes it starts eating out. In this case, the inner surface of the gasket 5 placed in the seal groove 4 comes into contact with the edge 2A of the housing body 2, so that the inward protrusion of the housing 1 (deformation) is restricted by the edge 2A. Therefore, it is possible to prevent a part of the gasket 5 from interfering with the outer periphery of the magnetic disk 8 or the like. However, since the seal groove 4 is open to the outside of the housing 1, each long portion 5A of the gasket 5 is largely compressed and deformed as a whole, so that it protrudes to the outside of the housing 1 as shown in FIG. However, the present invention has been developed in view of the problems of the prior art described above, and the present invention has been developed in view of the problems of the prior art described above. To provide a magnetic disk device capable of preventing a gasket held between abutting surfaces of a main body and a cover from protruding outward, improving the appearance, and solving problems such as poor sealing. [Means for Solving the Problem] The feature of the configuration adopted by the first invention in order to solve the above-mentioned problem is that one of the abutting surfaces of the housing body and the cover is The sealing member is sandwiched between an edging portion formed on the abutting surface so as to border the abutting surface and abutting the inner surface of the sealing member, and the edging portion so that the sealing member erodes outward. On the other hand, the feature of the structure adopted by the second invention is that at least one of the abutting surfaces between the housing body and the cover is provided with a seal retainer that prevents the seal from protruding. An engagement groove is provided at the contact portion with the seal member, and the seal member is provided with an engagement protrusion that detachably engages with the engagement groove and positions the seal member on the abutment surface. be.

[Effect]

With the above configuration, in the first invention, the sealing member can be held between the edging portion and the seal presser to reliably prevent the sealing member from protruding. Protrusion of the seal member can be more effectively prevented by appropriately arranging the seal presser at a convenient position. on the other hand,
In the second invention, by engaging the engagement protrusion of the seal member with the engagement groove of the housing body or the cover, the seal member can be positioned on the abutting surface of both, and the protrusion of the seal member can be reliably prevented. can. [Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In addition, in the embodiment, the same components as those of the prior art shown in FIGS. 5 to 7 described above are given the same reference numerals.
The explanation thereof will be omitted. 1 and 2 show a first embodiment of the present invention. In the figure, reference numeral 21 denotes a housing body that constitutes the housing 1 together with the cover 3. The housing body 21 is formed in the shape of a shallow container with a substantially rectangular shape, similar to the housing body 2 described in the prior art. Although an edge portion 21A is provided on the abutting surface of the housing body 21 to form a seal groove 4, the abutting surface of the housing body 21 is located on the same plane as both the left and right side surfaces of the housing body 21. A pair of seal pressers 21B, 21B are formed to protrude upward. Here, each seal presser 21B is formed into a substantially rectangular thin plate shape, and each long portion 5A of the gasket 5 is connected to the edge portion 21A.
It is designed to be held between the Each of the seal retainers 21B is disposed at the intermediate portion in the length direction of each long portion 5A, and its height is formed to be slightly smaller than the height of the gasket 5, similar to the edging portion 21A. has been done. Further, 4. of the housing main body 21. At the corners are screw holes 14, 14. which are located on the abutting surface with the cover 3 and into which each bolt 13 (see FIG. 7) is screwed. ... is formed. The magnetic disk device according to this embodiment has the above-described configuration, and its basic operation is not particularly different from that of the prior art. However, in this embodiment, seal pressers 21B, 21B are provided on the abutting surface of the housing main body 21 and protrude upward to sandwich each elongated portion 5A of the gasket 5 between the edge portion 21A.
Since each seal presser 21B is configured to abut the longitudinal intermediate portion of each long portion 5A from the outside, when the cover 3 is tightened on the housing body 21 with each bolt 13, the housing body 21 Even if the gasket 5 is strongly clamped between the abutting surfaces of the gasket 5 and the cover 3, and the gasket 5 is compressively deformed, each elongated portion 5A of the gasket 5 should not protrude as shown in FIG. This can be effectively prevented by the seal retainer 21B, and the gasket 5 can be kept in the seal groove 4 between the housing body 21 and the cover 3 for a long period of time. In addition to increasing the product value, the gasket 5 can continue to seal the inside of the housing 1 for a long period of time, improving sealing performance.Next, FIGS. The figure shows a second embodiment of the present invention, and the feature of this embodiment is that the edge portion 31A formed on the abutting surface of the housing body 31 is cut out in the middle to form a plurality of notches as engagement grooves. 32 (only one is shown), and a plurality of engaging protrusions 34 (only one shown) integrally formed on a gasket 33 serving as a sealing member are removably engaged with each of the notches 32. Here, although the gasket 33 is composed of each long portion 33A and each short portion 33B in almost the same way as the gasket 5 described in the prior art, the longitudinal direction of each long portion 33A is The intermediate portion includes a protrusion 34A that protrudes into the housing body 31 through each notch 32 and is formed with a width corresponding to the width of each notch 32;
An engagement protrusion 34 is provided, which is located on the tip side of the notch 32 and includes a substantially arcuate claw portion 34B that has a width larger than each cutout portion 32 and engages with the inner surface of the edging portion 31A. Further, the housing body 31 is formed in substantially the same manner as the housing body 2 described in the prior art except for each notch 32, and each notch 32 is formed in pairs on the left and right at the longitudinally intermediate portion of the edging portion 31A. A screw hole 14 is formed at each corner of the edge portion 31A. Thus, also in this embodiment configured in this way, by engaging each engaging protrusion 34 with each notch 32,
The gasket 33 can be prevented from protruding outward from the housing main body 31, and almost the same effects as in the first embodiment can be obtained. The seal presser 21B can be made unnecessary, the thickness β (see FIG. 3) of the cylindrical portion 31B of the housing main body 31 can be made thinner, and the whole can be made lighter. In addition, in each of the above embodiments, the housing body 21 (31)
Edged portion 21A (31A), seal presser 21 on the abutting surface of
B or notch 32 is provided in the above description, but instead of this, a edging portion 21A (3
1A), something similar to the seal presser 21B or the notch 32 may be provided. Further, in the second embodiment, it has been described that the notch portion 32 as an engagement groove is provided in the edging portion 31A of the housing body 31, but instead of this, the housing body 31
An engagement groove that opens on the seal groove 4 side may be provided on the upper surface of the cylindrical portion 31B, and an engagement protrusion that engages with the engagement groove may be provided on the lower surface side of the gasket 33 as a seal member. It is not necessary to provide the edging portion 31A [Effect of the Invention J As detailed above, according to the present invention, a seal retainer is provided on the abutting surface of the housing body or the cover to sandwich the seal member between the edging portion and the edging portion 31A. Since the seal member is provided to restrict the protrusion of the seal member, it is possible to reliably prevent the seal member from protruding outward, thereby increasing the commercial value and improving the sealing performance. Furthermore, the same effect as described above can be obtained by providing an engaging groove on the abutting surface of the housing body or the cover, and engaging the engaging protrusion of the seal member with the engaging groove. The reliability of disk devices can be improved.

[Brief explanation of the drawing]

1 and 2 show a first embodiment of the present invention, and FIG. 1 is an exploded perspective view of a housing body and a gasket;
FIG. 2 is a partially cutaway perspective view of the housing body showing the state in which the gasket is attached, FIGS. 3 and 4 show the second embodiment, and FIG. 3 is a perspective view similar to FIG. Figure 4 is an enlarged view of the main parts in Figure 3, Figures 5 to 7 show the prior art, Figure 5 is a longitudinal sectional view of the magnetic disk drive, and Figure 6 is an exploded perspective view of the housing body and gasket. Figure, 7th
The figure is a plan view of the magnetic disk device showing a state in which a part of the gasket protrudes. 3... Cover 4... Seal groove, 5.33... Gasket (sealing member), 6... Disk drive motor, 8... Magnetic disk, 9... Magnetic head moving mechanism, 12... ...Magnetic helad, 21゜1...Housing body, 21A. 1A...Edging portion, 32...Notch portion (engaging groove) 1B...Seal retainer 34...Engaging protrusion. Patent applicant Tokico Co., Ltd.

Claims (2)

[Claims] (1) a housing body formed in the shape of a bottomed container and provided with a magnetic disk and a magnetic head; a cover that abuts the housing body and covers the housing body;
In a magnetic disk drive comprising a sealing member interposed between the cover and the housing body to seal the inside, one of the abutting surfaces between the housing body and the cover has a , an edging portion formed to border the abutting surface and abutting the inner surface of the sealing member;
A magnetic disk drive characterized in that a seal presser is provided which clamps the seal member between the edge portion and prevents the seal member from protruding outward. (2) a housing body formed in the shape of a bottomed container and provided with a magnetic disk and a magnetic head; a cover that abuts the housing body and covers the housing body;
In a magnetic disk drive comprising a seal member interposed between the cover and the housing body to seal the inside, the seal member is provided on at least one of the abutting surfaces between the housing body and the cover. An engagement groove is provided at the contact portion with the member, and the seal member is provided with an engagement protrusion that detachably engages with the engagement groove and positions the seal member on the abutment surface. magnetic disk device.