JPS62279588A - Hermetically sealed type magnetic disk device - Google Patents

Abstract

PURPOSE:To replace a drying agent under any environment by arranging a case having a connecting hole and a throttle hole to pass through to outer air at the outer surface of a hermetically sealed container and enclosing the drying agent replaceably into the case. CONSTITUTION:At the corner part of a hermetically sealed container 1, a breathing hole 9 is provided and a filter 10 is stuck at the inner surface of the container 1. At the outer surface of the corner part of the container 1, a case 11 for enclosing the drying agent is provided. At the case 11, a connecting hole 12 to link directly to the breathing hole 9 and a throttle hole 13 to pass through the internal part of the case 11 to outer air are provided. In the case 11, a drying agent 15 is hermetically sealed. When the case 11 is removed from the container 1 or the case 11 is opened at the time of the replacement of the drying agent 15, the breathing hole 9 of the container 1 passes through the filter 10 to the outer air side and therefore, the dust will not enter the inside of the container 1. Consequently, a disk user can replace the drying agent even under the usual dust floating environment.

Description

DETAILED DESCRIPTION OF THE INVENTION 3. Detailed Description of the Invention The present invention relates to a sealed magnetic disk device, and particularly to a sealed electric disk device suitable for using a continuous medium such as sputtering as a recording medium.

[Conventional technology]

If dust or dirt floating in the air adheres to the surface of the recording medium, it may scratch the surface or cause a head crash, leading to data destruction, so the entire device is enclosed in a sealed container. A sealed magnetic disk device has been proposed.

On the other hand, in recent years, in order to increase the density of data, continuous media on which a magnetic thin film is formed by sputtering or the like have been used, but these media have the problem of being easily corroded.

Therefore, conventionally, as described in JP-A No. 60-147983, a restriction hole and a desiccant agent are arranged in the flow path of air entering the interior through a breathing hole formed in the sealed container. Corrosion is prevented by uniformly dehumidifying. By the way, the desiccant has an expiry date, so you must replace it with something newer - 16 times! +7f+1 Jōshichi! There is no consideration given to replacing the desiccant in a leaky situation.

[Perseverance while the invention is trying to solve the problem]

The above conventional technology has a configuration in which the filter of the breathing hole is attached to the cylinder side where the desiccant is installed, and when replacing the desiccant, it is necessary to remove the cylinder. At this time, the breathing holes are left open, making it impossible to replace the desiccant under normal circumstances. As a result, when replacing the desiccant, there is a problem in that the entire device must be transported to a dust-free, IJ-/environmental room for replacement. In particular, there are many situations where it is impossible to replace products in a clean environment, especially during the period when products are handed over to users after product inspection, or while they are being sent to a doctor.

Measures are urgently needed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sealed h'RA disk device that allows desiccant replacement under any environment.

[Means for solving problems]

The above object is to place a filter for a breathing hole provided in a sealed container inside the sealed container, and install a case on the outer surface of the sealed container having a connection hole directly connected to the breathing hole and a throttle hole communicating with the outside air, From K, a desiccant agent must be replaceably enclosed within the case.

achieved.

[Effect]

Since outside air passes through the desiccant inside the case and is led into the sealed container through the breathing holes, the inside of the sealed container is kept at a low humidity. Further, since the inside of the sealed container and the inside of the case are communicated through the filter and the breathing hole, the desiccant can be replaced while the inside of the case is open to the outside air.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows a sealed magnetic disk device according to the present invention.
A plan view showing the sealed container with the cover removed, Figure 2 is the same as Figure 1.
It is a perspective view of the case for enclosing a desiccant in the figure. In FIG. 1, there is a floating bend 2. in a sealed container 1 for recording and reproducing two data. A head arm 3 to which the head 2 is attached and rotates around the pivot shaft 4. Directly connected to a step motor 5 and a spindle motor (not shown) that provide track positioning driving force to the head arm 3 via a steel belt 6, the sputter recording medium 8 can be rotated by 360 Orp.
A hub 7 is arranged to rotate at m.

Two breathing holes 9 are provided at the corners of the sealed container 1 to allow air to enter and exit depending on the temperature, and a filter l is provided on the inner surface of the sealed container 1 to prevent dust from entering the outside air.
O is paste. Further, a case 11 for enclosing a desiccant agent is installed on the outer surface of the eight corners of the sealed container 1. This case 11 is removably attached to the sealed container 1 by fitting its triangular projection 11a into a triangular recess 1a formed on the outer surface of the sealed container 1 from above.

In FIG. 2, the case 11 has two connecting holes 12 that are directly connected to the breathing hole 9, and a diaphragm hole 13 that allows the inside of the case 11 to communicate with the outside air. Furthermore, a desiccant 15 containing a vaporizable anti-corrosion inhibitor is enclosed within the case 11 . And the case 1
1 is attached to the outer surface of the sealed container 1 as shown in Fig. 1.

The breathing hole 9 and the connecting hole 12 are connected to each other. Reference numeral 16 connects the breathing hole 9 and the connection hole 12 with a rubber gasket 7, which is attached to the case 1 in advance.
It is included in 1. Also.

The case 11 is made of a transparent plastic material so that the moisture absorption state of the desiccant 15 inside can be observed from the outside. Furthermore, the upper surface, lower surface, or l'i'' side surface of the case 11 is configured to be openable and closable, so that the desiccant can be easily replaced.

Next, the operation of this embodiment will be explained.

The outside air enters the case 11 through the entire throttle hole 13 of the case 11, where it is sufficiently dehumidified by the desiccant 15, and the dehumidified air flows through the connection hole 12. It is guided into the sealed container 1 through the breathing hole 9 and the filter 10? HW r h aJ
N sign-,! 1 car Atl<SumiFhltrmh-? +
-r In addition to preventing corrosion of the sputter recording medium, dust in the outside air is removed by the filter 14 of the case 11 and the filter 10 of the sealed container 1. Also.

When replacing the desiccant 15, the case 11 must be removed from the sealed container l, or the case lif! : When opened, the breathing hole 9 of the sealed container 1 communicates with the outside air through the filter 10, so that dust does not enter into the sealed container 1.

Therefore, the disk user can replace the desiccant even in a normal dust-floating environment, eliminating the inconvenience of replacing the desiccant in a lean environmental chamber as in the past.

Furthermore, in this embodiment, since the case 11 is made of a transparent plastic material, it is possible to know when to replace the desiccant simply by observing it from the outside.

Furthermore, in this embodiment, the case 11 and the sealed container 1
Since the rubber packing 16 is interposed on the contact surface with
In addition to the sealing effect between the breathing hole 9 and the connecting hole 12, the case 1
1 and the rubber packing 16 have the effect of ensuring reliable fixation.

FIG. 3 shows another embodiment of the present invention, in which a fitting part of the case 11 is formed by a folded part 21a of a cover 21 in a sealed container IK and a bent part 1b of a corner part of the sealed container 1, and the fitted part is The case 11 is removably attached to the sealed container 1 by fitting the case 11 in from the left and right directions.

In this embodiment as well, the same functions and effects as described above can be achieved. [Effects of the Invention] As explained above, 1. According to the present invention, 1. The desiccant can be replaced even in a normal dust-floating environment. This eliminates the inconvenience of having to replace it in a lean environmental chamber like in the past.

[Brief explanation of drawings]

1 and 2 are diagrams showing an embodiment of the present invention, and FIG. 1 is a plan view showing a sealed magnetic disk device according to the present invention with the cover of the sealed container removed. Figure 2 is a perspective view of the desiccant enclosure case in Figure 1;
FIG. 3 is a perspective view of a case mounting portion shown as another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Sealed container, 9... Breathing hole, 10... Filter, 11... Case for enclosing desiccant, 12... Connection hole.

Claims (1)

[Scope of Claims] 1. In a sealed magnetic disk device in which a magnetic disk is surrounded by a sealed container and a breathing hole with a filter is provided in the sealed container, the filter of the breathing hole is disposed inside the sealed container, A sealed magnetic disk device characterized in that a case having a connection hole directly connected to the breathing hole and a throttle hole communicating with the outside air is installed on the outer surface of the sealed container, and a desiccant is replaceably sealed in the case. . 2. A sealed magnetic disk device according to claim 1, wherein the case is removably attached to a sealed container. 3. A sealed magnetic disk device according to claim 1, wherein the case is made of a transparent plastic material.