JPH05217358A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To remarkably improve safety and reliability by providing a shutter preventing the magnetic disk device from the intrusion of dust and controlling the opening/closing of the shutter by means of a locking mechanism. CONSTITUTION:A projection part 52 provided on the side of a computer main body 50 is inserted through the window 8 of the disk device 20 and by abutting on a shutter releasing cam 6 and rotating it, the lock of a shutter part 3 covering a connector terminal 15 is released. By coming the shutter part 3 in the state releasing the lock into contact with a protruted part 55 provided on the side of the computer main body 50, the shutter part 3 opens inwardly to release the connector terminal 15 connected to a connector terminal 51 on the side of the computer main body 50 so that the device is in an operation state. Thus, since the shutter part 3 does not open as long as the lock mechanism 10 is activated, the terminals 15 is protected in high reliability from the intrusion of dust.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge type magnetic disk device which can be inserted into and removed from an external device such as a computer or a control unit.

[0002]

2. Description of the Related Art FIGS. 4 (a) and 4 (b) are a schematic perspective view and a side sectional view of an essential part showing the structure of a conventional cartridge type magnetic disk device and its mounting structure.

As shown in FIGS. 4 (a) and 4 (b), a conventional magnetic disk device 40 includes a substrate portion 42 having a plurality of terminal portions 15 at its tip, a substrate portion 42 and an HDA (head disk). The base portion 41 holds the assembly), the substrate portion 42 excluding the terminal portion 15, and the case portion 43 arranged so as to cover the base portion 41.

As shown in FIG. 4 (b), this magnetic disk device 40 is inserted from the direction of arrow A so that a main body 50 (hereinafter referred to as a computer main body) such as a computer or a control unit.
(Referred to as 50), the terminal portion 15 is connected to the connector terminal 51 provided on the computer main body 50 side to be in an operating state.

[0005]

In the conventional magnetic disk device 40, since the terminal portion 15 is open to the outside, dust adheres to the terminal portion 15 when the terminal portion 15 is transported and the signal level is increased. And a problem such as lowering the power supply voltage occurred.

In accordance with the present invention, a magnetic disk device having significantly improved operational reliability is provided by equipping a shutter unit and a shutter lock mechanism for opening the terminal unit only when the terminal unit is mounted in a computer body. It is what

[0007]

In order to solve the above problems, a magnetic disk device 20 according to the present invention, as shown in FIG. 1, has a protrusion 52 (hereinafter referred to as a protrusion) for unlocking, which is provided on the computer main body 50 side. The terminal portion is formed by contacting a window portion 8 into which a portion 52) is fitted in a loosely fitted state and a convex portion 55 (hereinafter referred to as a convex portion 55) for opening and closing a shutter provided on the computer main body 50 side. A shutter lock mechanism (hereinafter referred to as a lock mechanism) 10 including a shutter portion 3 for opening the shutter 15 and a shutter opening cam 6 for unlocking the shutter portion 3 by contacting the projection portion 52 is provided. Is characterized by.

[0008]

[Operation] This magnetic disk device 20 is a computer main body
When the projection 52 provided on the side of 50 is engaged with the inside of the apparatus through the window 8, the shutter opening cam 6 operates and the lock of the shutter 3 covering the terminal 15 is released, and the computer main body 50 When the convex portion 55 provided on the side contacts the shutter portion 3 in the unlocked state (unlocked state), the shutter portion 3 opens inward and the terminal portion 15 is opened. From
The terminal part 15 is not damaged by dust.

[0009]

The present invention will be described in detail below with reference to the drawings of the embodiments. 1 (a), 1 (b) and 1 (c) are schematic plan views, front views and side sectional views of an essential part showing one embodiment of the present invention, and FIGS. 2 (a) and 2 (b).
FIG. 3 is a schematic partial plan view of a partial cross section showing a detailed structure of a lock mechanism and a shutter part used in the present invention and a side sectional view of the main part. FIG. 3 is a detailed structure of a lock mechanism and a shutter part used in a modification of the present invention. FIG. 4 is a schematic side sectional view showing an important part of FIG. 4, but the same parts as those in FIG.

A magnetic disk device 20 according to the present invention is shown in FIG.
As shown in (a), (b) and (c), the window portion 8 into which the protrusion 52 provided on the computer main body 50 side is engaged in a loosely fitted state,
The shutter portion 3 that opens inward (in the direction of arrow F) to bring the internal terminal portion 15 into an open state by contacting the convex portion 55 provided on the computer main body 50 side, and the protrusion portion 52.
When it contacts with the lock pin, it rotates in the direction of arrow C
The lock mechanism 10 includes a shutter opening cam 6 that drives 6a in the direction of arrow D. In the figure, 1 is an opening / closing axis that is the center of rotation of the shutter portion 3, 4 is a restoring spring that constantly urges the shutter portion 3 in the direction of the arrow F '(direction that closes the shutter portion 3), and 5 is the restoring spring 4
And a spring shaft 2 for holding, respectively, a stopper for restricting the opening of the shutter portion 3 to the outside.

In this magnetic disk device 20, as shown in FIG. 1 (c), by mounting the magnetic disk device 20 in the computer main body 50 in the direction of arrow A, the projection 52 provided on the computer main body 50 side has the window portion. Enter from 8 in the direction of arrow B [Fig. 1
(See (a)], the shutter opening cam 6 is rotated in the direction of arrow C, and the rotation of the shutter opening cam 6 in the direction of arrow C causes the lock pin 6a to move its position in the direction of arrow D to lock the shutter portion 3. To cancel.

When the lock mechanism 10 is actuated and the shutter portion 3 is unlocked, the convex portion 55 provided on the computer main body 50 side presses the shutter portion 3 in the direction of the arrow B, and this is indicated by the arrow. Open in F direction. Shutter part 3
When the magnetic disk device 20 is further inserted into the computer main body 50 with the open state, the connector terminal 51 on the computer main body 50 side and the terminal portion 15 provided on the magnetic disk device 20 side substrate portion 42 come into contact with each other. Then, the magnetic disk device 20 is connected to the computer main body 50.

The detailed structure and operation of the lock mechanism 10 and the shutter portion 3 used in this embodiment will be described below with reference to FIGS. 2 (a) and 2 (b). As shown in FIG. 2A, the lock mechanism 10 includes a shutter opening cam 6 rotatably supported by a cam shaft 6c in the direction of the arrow CC ', and a holding member provided on the shutter opening cam 6 side. Arrow D by axis 6d
The lock pin 6a is movably held in the -D 'direction, and the tension spring 6e is supported at one end by the holding shaft 6d and at the other end by the partition wall 19.

The shutter portion 3 held by the opening / closing shaft 1 so as to be openable / closable in the arrow F-F 'direction is constantly urged by the restoring spring 4 in the arrow F'direction, as shown in FIG. 2 (b). It is arranged in a shape. In the figure, 5 indicates a spring shaft for holding the restoring spring 4.

Hereinafter, the lock mechanism 10 and the shutter unit 3 will be described.
The operation will be described in detail with reference to FIGS. 2 (a) and 2 (b). (1) When the magnetic disk device 20 is mounted in the computer main body 50 (see FIG. 1). When the magnetic disk device 20 is moved in the direction of mounting it in the computer main body 50 (direction of arrow B '), the projection 52 provided on the computer main body 50 side is engaged in the direction of arrow B from the window 8 to release the shutter. The operating surface 6b of 6 is pressed. ． By pressing the operating surface 6b by the protrusion 52, the shutter opening cam 6 rotates in the arrow C direction with the cam shaft 6c as the center of rotation. At this time, the tension spring 6d acts so as to rotate the shutter opening cam 6 in the arrow C'direction. The lock pin 6a held by the holding shaft 6d is moved in the direction of arrow D by the rotation of the shutter opening cam 6 in the direction of arrow C, and retracts from the surface of the partition wall 19. ． Since the lock pin 6a is retracted from the surface of the partition wall 19, the shutter portion 3 is released from the constraint by the lock pin 6a and can be opened and closed. ． When the magnetic disk device 20 is further inserted into the computer main body 50, the convex portion 55 provided on the computer main body 50 side comes into contact with the shutter portion 3 and presses it from the direction of arrow B. At this time, since the shutter section 3 is unlocked, the shutter section 3 is opened inward (direction of arrow F) and the magnetic disk device 20 is mounted on the computer main body 50. (2) When removing the magnetic disk device 20 from the computer main body 50. When the magnetic disk device 20 is removed from the computer main body 50 and the protrusion 55 moves away in the direction of arrow B ', the shutter unit 3
Is rotated in the direction of the arrow F ′ by the action of the restoring spring 4 to return to the original position (position in which it comes into contact with the stopper 2). ． When the magnetic disk device 20 is further removed and the projection 52 no longer presses the operating surface 6b of the shutter opening cam 6 (away from the operating surface 6b), the shutter opening cam 6 is actuated by the tension spring 6e to cause an arrow C '. It rotates in the direction and returns to the original position. At the same time when the shutter release cam 6 returns to the original position, the lock pin 6a moves in the direction of the arrow D'and locks the shutter portion 3.

Next, the structures of the lock mechanism and the shutter portion used in the modification of the present invention will be described in detail with reference to FIG. As shown in FIG. 3, this modification is an interlocking cam that unlocks the shutter portion 3 by contacting the protrusion 52 as an alternative to the shutter opening cam 6.
Equipped with a lock mechanism 10A equipped with 7a and 7b.

The lock mechanism 10A is a drive rod 24 which moves in the direction of arrow B when a projection 52 provided on the computer main body 50 side (not shown) is engaged through the window 8.
And an interlocking cam 7A that rotates in the arrow F direction around the shaft 30 by moving the position of the drive rod 24 in the arrow B direction, and a position in the arrow G direction by rotating the interlocking cam 7A in the arrow F direction. And the interlocking cam 7B that rotates in the direction opposite to the interlocking cam 7A (the arrow H direction) by the movement of the interlocking rod 23 in the arrow G direction, and the rotation of the interlocking cam 7B in the arrow H direction causes the arrow K direction. And a braking cam 21 that controls the opening and closing of the shutter portion 3 in correspondence with the position of the braking rod 22. In the figure, reference numeral 26 indicates a bearing that slidably holds the connecting rod 23 and the braking rod 22.

The operation of the lock mechanism 10A will be described below. (1) When the magnetic disk device 20A is mounted in the computer main body 50. When the magnetic disk device 20A is moved in the mounting direction of the computer main body 50 (not shown), first, the projection 52 provided on the computer main body 50 side is moved from the window 8 to the arrow B.
And push the drive rod 24 in the direction of arrow B. ． As the drive rod 24 moves in the direction of arrow B, the interlocking cam 7A rotates about the shaft 30 in the direction of arrow F to move the connecting rod 23 in the direction of arrow G. . As the connecting rod 23 moves in the direction of arrow G, the interlocking cam 7B rotates in the direction of arrow H with the shaft 30 as the center of rotation. ． The rotation of the interlocking cam 7B in the direction of arrow H causes the braking rod 22 to move in the direction of arrow K. ． By moving the position of the braking rod 22 in the direction of arrow K, the braking cam 21 fixed to the opening / closing shaft 1 of the shutter portion 3 can move in the direction of arrow F, and as a result, the shutter portion 3 can be opened and closed. Become. . When the magnetic disk device 20A is further inserted, the convex portion 55 provided on the computer main body 50 side presses the shutter portion 3 from the direction of arrow B, but at this time, the shutter portion 3 is unlocked. Therefore, the shutter portion 3 is opened inward (direction of arrow F) to open the magnetic disk device.
20 A is mounted on the computer main body 50. (2) When removing the magnetic disk device 20A from the computer main body 50. When the magnetic disk device 20A is removed from the computer main body 50 and the convex portion 55 moves away in the direction of arrow B ', the shutter portion 3 rotates in the direction of arrow F'by its own weight and returns to the original position (the position where it abuts the stopper 2). Return. ． Further, when the magnetic disk device 20A is removed and the projection 52 no longer presses the drive rod 24, the drive rod 24 moves in the direction of the arrow B ′ by the restoring force of the compression spring 25 and returns to the original position. .. As the drive rod 24 returns to the original position, the interlocking cam 7A rotates in the direction of arrow F ', the connecting rod 23 moves in the direction of arrow G', the interlocking cam 7B rotates in the direction of arrow H ', and the braking rod moves. 22 moves in the direction of arrow K'and returns to the original position. ． When the braking rod 22 returns to its original position, the braking cam
21 cannot be opened or closed due to the restraint of the braking rod 22. As a result, the shutter unit 3 is locked.

Magnetic disk drive 20, 20A according to the present invention
Is equipped with a shutter section 3 for preventing dust from entering the apparatus, and the opening and closing of the shutter section 3 is controlled by a lock mechanism 10, 10A. Extremely high

[0020]

As is apparent from the above description, the magnetic disk device according to the present invention is provided with a shutter portion so as to prevent dust and the like from entering the device, and the shutter portion is not opened unless the lock mechanism operates. Due to the structure, the reliability of the device is particularly high and the safety is excellent.

[Brief description of drawings]

FIG. 1 is a schematic plan view, a front view, and a side sectional view of an essential part showing an embodiment of the present invention.

2A and 2B are a schematic partial plan view and a partial side cross-sectional view showing a detailed structure of a lock mechanism and a shutter unit used in the present invention.

FIG. 3 is a schematic side sectional view showing a detailed structure of a lock mechanism and a shutter portion used in a modification of the present invention.

FIG. 4 is a schematic perspective view showing a configuration of a conventional magnetic disk device and its mounting structure, and a side sectional view of a main part.

[Explanation of symbols]

 1 Open / close shaft 2 Stopper 3 Shutter part 4 Restoring spring 5 Spring shaft 6 Shutter release cam 6a Lock pin 7A, 7B interlocking cam 8 Window part 10, 10A Lock mechanism 15 Terminal part 19 Partition wall 20, 20A, 40 Magnetic disk device 21 Braking cam 22 Braking rod 23 Connection rod 24 Drive rod 25 Compression spring 26 Bearing 30 Shaft 41 Base portion 42 Board portion 43 Case portion 50 Computer main body 51 Connector terminal 52 Projection portion 55 Convex portion

Continued Front Page (72) Inventor Kiichiro Kasai 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Within Fujitsu Limited

Claims (2)

[Claims] 1. A small case structure that can be inserted into and removed from a large external device (50), and a terminal portion (15) provided at one end of the case at the time of insertion is provided on the external device (50) side. A magnetic disk device that operates by contacting the connector terminal (51) with a lock release protrusion provided on the external device (50) side.
The terminal part (15) is formed by contacting the window part (8) into which the (52) is fitted in a loose fit state and the convex part (55) for opening and closing the shutter provided on the computer body (50) side.
A shutter lock mechanism (10) comprising a shutter part (3) for opening the shutter part, and a shutter release cam (6) for unlocking the shutter part (3) by contacting the protrusion part (52), A magnetic disk device comprising: 2. An interlocking cam, which replaces the shutter opening cam (6) and unlocks the shutter part (3) by contacting the unlocking protrusion (52).
2. The magnetic disk drive according to claim 1, further comprising a shutter lock mechanism (10A) including (7a) and (7b).