JPH11339457A - Magnetic disk apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the deflection of a door to prevent the disengagement thereof when a floppy disk is inserted by providing a deflection preventing door opposing to the door with the first interval at the area near the rotating shaft of the door and providing an engaging portion on the door to be engaged with the deflection preventing area if the door is deflected to the bottom surface side. SOLUTION: Since a sheet cover is provided with a deflection preventing portion 2b keeping the first predetermined interval along the floppy disk inserting direction in the rear surface side and a door 5 is provided with a contact portion 5b to be in contact with the deflection preventing portion 2b when the door is deflected in the inserting direction and a projected piece 5c to be engaged with the deflection preventing portion 2b, the deflection of the door 5 can be controlled and the rotating shaft 5a of the door 5 can be prevented to be disengaged from the supporting portion 31d. Moreover, since the deflection preventing portion 2b, contact portion 5b and projected piece 5c are provided at the center of the door 5 in the width direction, the maximum deflection of the door 5 can be reduced to less than the first predetermined interval and second predetermined interval and the door 5 can be prevented to be disengaged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive provided with an opening / closing mechanism for preventing a door for opening / closing an opening of a panel for inserting and ejecting a recording medium from coming off.

[0002]

2. Description of the Related Art FIG. 7 is an explanatory view showing a conventional magnetic disk drive. In the figure, reference numeral 20 denotes a floppy disk (hereinafter referred to as FD), in which a disk-shaped recording medium 21 is housed in a cartridge 22. 30
Is a magnetic disk device that records information on the recording medium 21 or reproduces the recorded information. Reference numeral 31 denotes a frame of the magnetic disk drive 30, and 31a denotes support portions provided on the wall surfaces on both sides of the frame 31, and supports the rotating shaft portion 35a. Reference numeral 31b denotes a bottom surface portion of the frame 31, in which a medium drive motor (not shown) for rotating the recording medium 21 and a magnetic head mechanism (not shown) for recording information on the recording medium 21 or reproducing the recorded information are arranged. Is done. Reference numeral 32 denotes a shield cover of the magnetic disk device 30, and reference numeral 32 a denotes a claw portion provided on the shield cover 32, which engages with the locking portion 31 c to fix the shield cover 32 to the frame 31.

A front panel 33 has a rectangular opening 34 for inserting and ejecting the FD 20. Reference numeral 35 denotes a door, which is opened by rotating about a rotation shaft 35a provided on both sides thereof as a rotation axis.
Open and close. The door 35 is urged by a coil spring (not shown) to close the opening 34 when the FD 20 is not inserted into the magnetic disk device 30. Reference numeral 36 denotes a medium insertion slot mechanism,
5 is included.

For example, when a user moves the FD 20 in the direction A, the cartridge 22 contacts the door 35 and the door 3
5 to the inside of the apparatus, and the opening 3 of the front panel 33 is opened.
4, the FD 20 is inserted into the magnetic disk device 30.

[0005] The FD 20 is arranged at a predetermined position in the magnetic disk drive 30 by a loading mechanism (not shown). The recording medium 21 is rotated by a medium drive motor (not shown). The magnetic disk device 30 is provided for the recording medium 21 of the FD 20 disposed at a predetermined position.
A magnetic head (not shown) is arranged at a predetermined position on the recording medium 21 by a head positioning mechanism (not shown) of the magnetic head mechanism (not shown), and information recording or reproducing operation is performed by the magnetic head. The shield cover 32 includes a loading mechanism mounted on the frame 31, a medium drive motor,
Protects the head positioning mechanism, magnetic head, etc. from external electrical noise.

[0006]

In recent years, there has been a demand for a reduction in the size and weight of the magnetic disk drive 30. For this reason, the medium insertion opening mechanism 36, which has little relation to the recording / reproduction characteristics, has been simplified and reduced in weight. ing. As shown in FIG. 8, when the FD 20 is inserted and the FD 20 comes into contact with the portion B of the door 35 and is pushed in the direction A, as shown in FIG. There is a problem in that the door 35 is bent without rotating, and the rotating shaft 35a comes off the support 31a.

In order to improve this, Japanese Patent Laid-Open No. 6-520 discloses
For example, there is one disclosed in Japanese Patent Application Publication No. 90-90. This is shown in FIG.
As shown in FIG.
The flexure preventing portion 32b formed by bending the first portion is disposed so as to face the upper portion of the door 35 to prevent the flexure of the door 35 in the direction A. However, even if the deflection preventing portion 32b is provided, if the FD 20 is pushed in the direction C (that is, the bottom portion 31b side of the frame 31), the door 3 is not necessarily provided.
5 does not come into contact with the deflection preventing portion 32b, and the door 35 comes off.

Note that the FD 20 comes into contact with the portion B and the direction C
The state of being pressed by the user is a unique problem that is likely to occur significantly in the magnetic disk device 30 which is often arranged at a position lower than the user's eyes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a magnetic disk drive having a medium insertion opening mechanism capable of preventing a door from bending when an FD is inserted is prevented. The purpose is to gain.

[0010]

A magnetic disk drive according to the present invention has a medium having an opening through which a disk-shaped recording medium is inserted, and a door which is rotatably supported at both ends by a shaft and opens and closes the opening. An insertion slot mechanism, a frame in which the medium insertion slot mechanism is attached to the end and a magnetic head mechanism is arranged on the bottom surface, and a door arranged behind the door and the door bends in the direction of inserting the recording medium. A bending prevention unit for preventing the bending of the door, wherein the bending prevention unit is disposed opposite to the door at a first predetermined interval in the vicinity of the rotation axis of the door, and the door is disposed on the bottom surface side. And an engagement portion that engages with the deflection prevention portion when flexing.

Further, the engaging portion has a second predetermined interval between the engaging portion and the bending preventing portion, and is provided so as to protrude from the door so as to sandwich the bending preventing portion between the engaging portion and the bottom surface of the frame. It is a protruding piece.

[0012] The engaging portion is provided on the back surface substantially at the center in the width direction of the door, and the deflection preventing portion is disposed to face the engaging portion.

[0013] The engagement portion has a second portion between the engagement portion and the deflection preventing portion.
Are provided so as to have a predetermined interval and to evenly divide the width of the door, and a plurality of the deflection preventing portions are provided corresponding to the plurality of engaging portions.

The door is formed with a rotation shaft so as to sandwich the deflection preventing portion between the door and the bottom surface of the frame, and the engagement portion is a rod-like member substantially coinciding with the rotation shaft.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 An embodiment of the magnetic disk drive according to the present invention will be described. FIG.
FIG. 2 is an external perspective view showing a magnetic disk drive according to the first embodiment, FIG. 2 is an exploded perspective view showing a medium insertion slot mechanism, and FIG. 1 to 3, the same reference numerals as those in FIGS. 7 to 9 denote the same or corresponding parts, and a description thereof will be omitted. In FIG. 1, reference numeral 1 denotes a magnetic disk device, which records information on a recording medium 21 or reproduces the recorded information. Reference numeral 2 denotes a shield cover of the magnetic disk drive 1, and reference numeral 2a denotes a claw provided on the shield cover 2, which engages with the locking portion 31c.
Is fixed to the frame 31. 3 is a magnetic disk drive 1
A front panel 4 made of resin provided on the front surface of the front panel 3 has an opening provided on the front panel 3, and a door 5 made of resin opens and closes the opening 4. Reference numeral 5a denotes a rotating shaft portion made of resin provided on both sides of the door 5, and is pivotally supported by the support portion 31a. The door 5 has its surface abutted against the FD 20 and is pressed in the insertion direction A, and pivots around a pivot axis formed by the pivot shaft portion 5a.

In FIG. 2, reference numeral 2b denotes a shield cover 2.
Is provided on the shield cover 2.
5b are contact portions provided on the back surface side of the door 5, and come into contact with the deflection preventing portion 2b when the door 5 is bent in the direction A. Reference numeral 5c denotes a protruding piece which is an engaging portion provided on the door 5, and engages with the deflection preventing portion 2b when the door 5 is bent toward the bottom surface 31b of the frame 31. As shown in FIG. 2, the contact portion 5b and the deflection preventing portion 2b are located substantially at the center of the door 5 in the width direction.

Note that, as shown in FIG.
b is a substantially L-shaped cross section, and a falling part 2b1 that falls from the outer surface 2c to the bottom part 31b side, and a flat part 2b2 that is parallel to the outer surface 2c from the lower end of the falling part 2b1.
have. Further, a first predetermined interval D along the insertion direction A is formed between the tip of the flat portion 2b2 and the contact portion 5b of the door 5.

Further, the protruding piece 5c is positioned closer to the shield cover 2 than the first predetermined distance D from the door 5 so as to sandwich the deflection preventing portion 2b between the protruding piece 5c and the bottom protruding piece 5c. And a second predetermined interval E is formed between the flat portion 2b2 and the flat portion 2b2 so as to extend substantially in the falling direction of the deflection preventing portion 2b. The contact portion 5b and the flat portion 2
b2 is located near the rotation axis of the door 5.

In FIG. 2, reference numeral 6 denotes a coil spring which urges the door 5 so as to close the opening 4. 7
Is a medium insertion slot mechanism provided in the magnetic disk drive 1 and includes the configurations denoted by reference numerals 2 to 6 described above.

Next, the operation will be described with reference to the drawings. For example,
When the user or the like moves the FD 20 (shown in FIG. 1) in the direction A, the cartridge 22 comes into contact with the surface of the door 5 and rotates the door 5 inside the magnetic disk drive 1 (shown in FIG. 1).
F is inserted into the magnetic disk drive 1 through the opening 4 of the front panel 3.
D20 is inserted.

The magnetic disk drive 1 has the inserted FD 2
0 is arranged at a predetermined position in the magnetic disk drive 1 by a loading mechanism (not shown). Also, the recording medium 21
Is rotated by a medium drive motor (not shown). The magnetic disk drive 1 uses a magnetic head (not shown) by a head positioning mechanism (not shown) of a magnetic head mechanism (not shown).
Is arranged on a predetermined recording track of the recording medium 21, and information recording or reproducing operation is performed.

Next, the operation of the door 5 and the deflection preventing portion 2b will be described with reference to FIG. For example, when the FD 20 comes into contact with the portion B and pushes the door 5 in the direction A, the door 5 bends in the direction A without rotating. When the door 5 is bent by the first predetermined distance D, the contact portion 5b comes into contact with the tip of the flat portion 2b2 of the deflection prevention portion 2b, so that the door 5 is suppressed from being further bent by the deflection prevention portion 2b. You. Therefore, the door 5 does not bend more than the first predetermined interval D, and the rotation shaft 5a
Does not come off the support portion 31a.

Further, for example, the FD 20 contacts the portion B, and the door 5 is moved in the direction C (that is, the bottom 31b of the frame 31).
Side), the door 5 bends in the direction C without rotating.
When the door 5 bends by the second predetermined distance E, the protruding piece 5c engages with the flat portion 2b2 of the deflection preventing portion 2b, so that the bending of the door 5 is further suppressed by the deflection preventing portion 2b. Therefore, the door 5 does not bend more than the second predetermined distance E, and the rotating shaft 5a does not come off from the support 31a. As described above, the direction is formed by the projecting piece 5c having a simple shape of projecting from the door 5 to the shield cover 2 side beyond the first predetermined interval D so as to sandwich the deflection preventing portion 2b between the bottom portion 31b and the bottom portion 31b. The deflection of the door 5 to C can be suppressed to prevent the door 5 from coming off.

Since the contact portion 5b, the protruding piece 5c and the deflection preventing portion 2b are located substantially at the center of the door 5 in the width direction, it is provided at a portion where the deflection of the door 5 is most likely to be largest. Therefore, the deflection of the door 5 can be reliably suppressed, and the door 5 can be prevented from coming off.

It should be noted that a plurality of contact portions 5b, protruding pieces 5c and deflection preventing portions 2b may be provided. FIG. 4 is an exploded perspective view showing another mode of the medium insertion slot mechanism. In the configuration shown in FIG. 4, two pieces of the bending prevention portion 2b, the contact portion 5b, and the protruding piece 5c are provided so as to divide the width of the door 5 into approximately three equal parts. Deflection prevention portion 2b, contact portion 5b, and projecting piece 5c
In this way, even when the FD 20 hits the door 5 on either side, the door 5 can be prevented from bending and the door 5 can be prevented from coming off, as in the case shown in FIG.

According to the magnetic disk drive 1 of the first embodiment, the shield cover 2
20 is provided with a deflection preventing portion 2b at a first predetermined interval D along the insertion direction A, and the door 5 has an abutting portion 5b which comes into contact with the deflection preventing portion when bent in the insertion direction A; Projection piece 5 that engages with deflection prevention portion 2b when flexing in direction C
c, even if the FD 20 presses the door 5 in the direction A or the direction C, the contact between the deflection preventing portion 2b and the contact portion 5b or the engagement between the deflection preventing portion 2b and the protruding piece 5c. The bending of the door 5 can be suppressed by the combination,
a can be prevented from coming off the support portion 31a.

The deflection preventing portion 2b, the abutting portion 5b and the protruding piece 5c have the largest deflection when the door 5 is pressed in the direction A or the direction C, that is, when the door 5 is pressed in the direction A or the direction C. Since it is provided in the portion, the maximum deflection amount of the door 5 can be made equal to or less than the first predetermined interval D and the second predetermined interval E, and the door 5 can be prevented from coming off.

In the case where a plurality of deflection preventing portions 2b, contact portions 5b, and projecting pieces 5c are provided, for example, a plurality of contact portions 5b, Since any one of the members 5c abuts or engages with the bending prevention portion 2b, the bending of the door 5 can be suppressed and the door 5 can be prevented from coming off.

Embodiment 2 Another embodiment of the magnetic disk drive of the present invention will be described. FIG. 5 shows the second embodiment.
FIG. 6 is an exploded perspective view showing an embodiment of the medium insertion mechanism according to the present invention, and FIG. 6 is a sectional view of the medium insertion mechanism shown in FIG. 5 at the center in the width direction. In the figure, the same reference numerals as those in FIG. 2 or FIG. In FIG. 5, 2
d is a deflection preventing portion provided on the shield cover 2;
d is a round bar-shaped member that is an engagement portion provided on the door 5, and is formed so that its axial direction substantially coincides with the rotation axis formed by the rotation shaft portion 5a.

Note that, as shown in FIG.
d is a falling portion 2 formed to have a substantially L-shaped cross section and falling from the outer surface 2c to the bottom portion 31b side with respect to the rotation axis of the door 5.
d1 and a flat portion 2d2 parallel to the outer surface 2c from the lower end of the falling portion 2d1. In addition, the round bar-shaped member 5
d is provided on the door 5 so as to sandwich the plane portion 2d2 between the door 5 and the bottom surface portion 31b. Further, D1 and D2 are first predetermined intervals, and the contact portion 5b of the door 5 and the flat portion 2
distance between the tip of d2 and the insertion direction A, the round bar-shaped member 5
This is the distance along the insertion direction A between d and the falling part 2d1, and D1 = D2 = D (shown in FIG. 3). E1 is a second predetermined interval, which is the round bar-shaped member 5d and the flat portion 2d2.
And E1 = E (shown in FIG. 3).

By forming the door 5 and the deflection preventing portion 2d as shown in FIG. 5, the bending of the door 5 in the inserting direction A and the direction C is performed similarly to the door 5 and the bending preventing portion 2b shown in FIG. And the door 5 can be prevented from coming off.

Further, when the door 5 is bent, the deflection preventing portion 2
Since the engaging portion that engages with d is the round bar-shaped member 5d, the falling portion 2d1 and the flat portion 2d2 can be arranged so as to be in sliding contact with the round bar-shaped member 5d. In this case, the first predetermined interval D2 and the second predetermined interval E1 can be eliminated, and the deflection of the door 5 can be substantially eliminated.

[0033]

According to the magnetic disk drive of the present invention,
A flexure preventing portion for preventing the door from flexing in the recording medium insertion direction is disposed opposite to the door at a predetermined interval in the vicinity of the rotation axis of the door, and the flexure preventive portion is provided when the door flexes toward the bottom side of the frame. Is provided, the amount of deflection of the door toward the bottom surface side of the frame can be suppressed, and the door can be prevented from coming off.

According to the magnetic disk drive of the present invention, the engagement portion has the second predetermined interval between the engagement portion and the deflection prevention portion, and the engagement portion sandwiches the deflection prevention portion between the engagement portion and the bottom surface of the frame. Since the protruding piece is provided to protrude from the door, the engaging portion can be engaged with the deflection preventing portion when the door bends to the bottom side of the frame with an easy configuration, and the amount of deflection of the door can be reduced. The door can be prevented from coming off.

According to the magnetic disk drive of the present invention, furthermore, the engaging portion is provided on the back surface substantially at the center in the width direction of the door, and the deflection preventing portion is arranged to face the engaging portion.
When the door bends toward the bottom surface of the frame, the maximum amount of deflection can be set to substantially the second predetermined interval, and the door 5 can be prevented from coming off.

According to the magnetic disk drive of the present invention, a plurality of engaging portions are provided so as to have a second predetermined interval between the engaging portions and the deflection preventing portion and to divide the width of the door substantially equally. Are provided corresponding to the plurality of engaging portions, so that the recording medium hits one of the right and left sides of the door, and any one of the plurality of engaging portions reliably engages with the deflection preventing portion. In addition, it is possible to prevent the door from sagging on the bottom surface of the frame and prevent the door from coming off.

According to the magnetic disk drive of the present invention, the door has the pivot shaft formed so as to sandwich the deflection preventing portion between the door and the bottom surface of the frame, and the engaging portion has the rod-like member substantially coinciding with the pivot shaft. Therefore, it is possible to suppress the deflection of the door and prevent the door from coming off.

[Brief description of the drawings]

FIG. 1 is an external view showing a magnetic disk drive according to Embodiment 1 of the present invention.

FIG. 2 is an exploded perspective view of the medium insertion slot mechanism shown in FIG.

FIG. 3 is a sectional view of the medium insertion slot mechanism shown in FIG. 2;

FIG. 4 is an exploded perspective view of a medium insertion slot mechanism of another embodiment.

FIG. 5 is an explanatory diagram showing an aspect of a medium insertion slot mechanism according to a second embodiment of the present invention.

6 is a sectional view of the medium insertion slot mechanism shown in FIG.

FIG. 7 is an operation explanatory view of a medium insertion slot mechanism of a conventional magnetic disk drive.

FIG. 8 is a cross-sectional view of a conventional medium insertion slot mechanism.

FIG. 9 is a sectional view of another conventional medium insertion opening mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Magnetic disk drive, 2 Shield cover, 2a
Claw portion, 2b deflection prevention portion, 2b1 falling portion, 2b2 flat portion, 2c outer surface, 2d deflection prevention portion, 2d1 falling portion, 2d2 flat portion,
3 front panel, 4 opening, 5 door, 5a rotating shaft, 5b contact part, 5c protruding piece, 5d round bar-shaped member, 6 coil spring, 7 medium insertion mechanism,
31 frames.

Claims (5)

[Claims] 1. A medium insertion mechanism having an opening through which a disk-shaped recording medium is inserted and a door rotatably supported at both ends by shafts to open and close the opening. A magnetic disk, comprising: a frame attached to the unit and having a magnetic head mechanism disposed on a bottom surface thereof; and a bending prevention unit disposed on the back side of the door to prevent the door from bending in a direction in which the recording medium is inserted. In the device,
The deflection preventing portion is disposed opposite to the door at a first predetermined interval near the rotation axis of the door, and the door is engaged with the deflection preventing portion when the door is bent toward the bottom portion. A magnetic disk drive characterized by having a unit. 2. A protruding piece provided at a second predetermined interval between the engagement portion and the deflection preventing portion, and protruding from the door so as to sandwich the deflection preventing portion between the engagement portion and the bottom surface of the frame. 2. The magnetic disk drive according to claim 1, wherein: 3. The magnetic disk according to claim 2, wherein the engaging portion is provided on the back surface at a substantially central portion in the width direction of the door, and the deflection preventing portion is arranged to face the engaging portion. apparatus. 4. A plurality of engaging portions are provided so as to have a second predetermined distance between the engaging portions and the deflection preventing portion and to divide the width of the door substantially equally, and the bending preventing portion is provided with the plurality of engaging portions. 3. The magnetic disk drive according to claim 2, wherein a plurality of magnetic disk drives are provided in correspondence with the above. 5. The door is formed with a rotation shaft so as to sandwich the deflection preventing portion between the door and the bottom surface of the frame, and the engagement portion is a rod-like member substantially coinciding with the rotation shaft. The magnetic disk drive according to claim 1.