JP2831447B2 - Magnetic disk drive - Google Patents

Description

The present invention relates to a magnetic disk drive such as a still video floppy disk drive for recording / reproducing information on / from a flexible magnetic disk. In particular, the present invention relates to a mounting position of a regulating member for suppressing the magnetic disk from fluttering in the vicinity of a head support, also called a negative pressure pad.

2. Description of the Related Art A magnetic disk drive for recording / reproducing information on / from a magnetic disk (hereinafter simply referred to as a disk) as an information recording medium is provided outside an information processing apparatus such as a personal computer or a word processor. Currently, it is widely used as a storage device. One of these information processing apparatuses is called a still video floppy disk activation apparatus for recording / reproducing a still image. This disk drive is mounted on a still video camera and operates in the same way as a camera using a photosensitive film.
Image information is recorded on a still video floppy disk.

As shown in FIG. 3, a head support 2 also called a negative pressure pad for projecting and supporting a magnetic head 1 and a head support 2 for a disk 4 are provided in this type of still video floppy disk drive. And a regulating member 3 which is also referred to as an upper pad for regulating the maximum distance from the head. Here, the head support 2 is, for example, as disclosed in Japanese Patent Application No. 62-251543, and has a recess for generating a negative pressure during rotation of the disk. A magnetic head projects into the recess.
It supports and sucks the disk. Also,
The upper surface 2a of the head support 2, that is, the surface facing the disk 4, is inclined as shown to stabilize the contact between the magnetic head 1 and the disk 4 and improve the recording / reproducing characteristics. The upstream portion 2b in the rotation direction (the direction of arrow A) is closer to the free rotation surface B of the disk 4 than the downstream portion 2c. On the other hand, the restricting member 3 is held so as to be able to move up and down, and is normally disposed near the head support 2 and upstream of the magnetic head 1 in the disk rotation direction at the time of loading, and the lowermost end thereof is the free rotation surface B of the disk 4. When the disk 4 is positioned lower than that, the disk 4 can be prevented from fluttering in the vicinity of the head support 2 during rotation, and as a result, the disk 4 can be surely sucked to the upper surface 2a of the head support 2. I'm sorry.

[Problems to be Solved by the Invention] By the way, the regulating member 3 does not perform its original function unless it is disposed near the head support 2.
Since the upper surface 2a is inclined and the distance between the upstream portion 2b and the free rotation surface B of the disk 4 is narrow, the above-described conventional structure requires a high precision in the mounting position of the regulating member 3. There was a problem that. That is, when the regulating member 3 is disposed closer to the head support 2 than the predetermined position,
There is a danger that the disc 4 is pinched between the head support 2 and the regulating member 3 and may be damaged or cannot rotate. To avoid such an accident, the mounting accuracy of the regulating member 3 must be increased. As a result, this has been a factor of reducing the assemblability of the device.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a magnetic disk drive device which solves the above-mentioned problems of the prior art, does not require high mounting accuracy for the regulating member, and has good assemblability.

[Means for Solving the Problems] An object of the present invention is to provide a magnetic head, a head support that projects and supports the magnetic head, generates a negative pressure when the disk rotates, and sucks the disk, A regulating member disposed on the side opposite to the head support side via the disc, for regulating a maximum separation amount of the disc from the head support body, and a face of the head support body facing the disc. In the magnetic disk drive device in which the upstream part in the disk rotation direction is closer to the free rotation surface of the disk than the downstream part in the disk drive device, the restricting member is moved in the vicinity of the head support to the magnetic head. And the lowermost end of the regulating member is located closer to the head support than the free rotating surface of the magnetic disk. Achieved.

[Operation] The surface of the head support facing the disk has a wider space between the free rotation surface of the disk in the downstream portion in the disk rotation direction than in the upstream portion.
Even if there is a slight error in the mounting position of the regulating member, an accident that the disk is pinched between the head support and the regulating member does not occur.

Example An example of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view of a main part of a magnetic disk drive device according to one embodiment of the present invention, and portions corresponding to FIG. 3 are denoted by the same reference numerals.

As shown in FIG. 1, in this embodiment, a regulating member 3 for regulating a maximum distance of a disk 4 from a head support 2 is provided.
Is located downstream of the magnetic head 1 in the disk rotation direction (direction of arrow A) near the head support 2, in other words, at a position facing the downstream portion 2 c of the upper surface 2 a of the head support 2 via the disk 4. The disc 4 is driven to rotate in a state where the disc 4 is disposed and its lowermost end is positioned below the free rotation surface B of the disc 4. Therefore, the disc 4 is restrained from fluttering by the regulating member 3 on the downstream side of the magnetic head 1 and bends below the free rotation surface B. As a result, the disc 4 is placed on the upper surface of the head support 2.
Negative pressure is generated between the magnetic head 1 and the magnetic head 1, and a stable contact between the disk 4 attracted to the upper surface 2a and the magnetic head 1 is guaranteed.

Since the space between the downstream portion 2c and the free rotation surface B of the disk 4 is relatively wide due to the inclination of the upper surface 2a of the head support 2, the regulating member 3 is temporarily moved from the predetermined position to the head support. Even if they are arranged closer to each other, the accident that the disk 4 is pinched between the head support 2 and the regulating member 3 does not occur, so that the mounting position of the regulating member 3 does not have to be set strictly as in the past. No problem. That is, in this embodiment, since the mounting position of the regulating member 3 can be set relatively rough, the assemblability of the apparatus is improved accordingly.

The inclination angle of the upper surface 2a of the head support 2 is 5 'to 40'.
In the case of a normal still video floppy disk drive set to a distance of less than 0.1 mm, the distance between the restricting member 3 and the head support 2 disposed downstream of the magnetic head 1 is 0.1 mm or less. The suction by the upper surface 2a of the support 2 has been confirmed by experiments performed by the present inventors.

FIG. 2 is an explanatory view of a main part of a magnetic disk drive device according to another embodiment of the present invention, wherein the shape of a regulating member 3 disposed downstream of the magnetic head 1 is different from that of the above-described embodiment. The fluttering of the disk 4 can be suppressed in a wider area.

[Effects of the Invention] As described above, according to the present invention, the regulating member
The disk is located downstream of the magnetic head because the lower end of the restricting member is located closer to the head support than the free rotation surface of the magnetic disk, while the magnetic head is disposed downstream of the magnetic head in the direction of rotation of the magnetic disk in the vicinity of the head support. The fluttering is suppressed by the restricting member, and the disk bends below the free rotation surface. As a result, the disk comes close to the upper surface of the head support and a negative pressure is generated between the two, and the disk is sucked to this upper surface. Stable contact between the disk and the magnetic head is guaranteed. Focusing on the fact that the gap between the free-rotation surface of the disk and the downstream portion of the surface of the head support body facing the disk is wider than that of the upstream portion, the head support is disposed downstream of the magnetic head. Since the maximum distance of the disk from the head support is restricted by the restricting member, even if there is a slight error in the mounting position of the restricting member, there is no danger of the disk being damaged or being unable to rotate. When the member does not require a high mounting accuracy as in the related art, the assemblability of the magnetic disk drive device is greatly improved, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a main part of a magnetic disk drive according to one embodiment of the present invention, FIG. 2 is an explanatory view of a main part of a magnetic disk drive according to another embodiment of the present invention, and FIG. It is explanatory drawing which shows an example. 1 ... magnetic head, 2 ... head support, 2a ... top surface,
2b ... upstream part, 2c ... downstream part, 3 ... regulating member, 4 ... magnetic disk.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshitaka Watanabe 3-16-1, Shimonoge, Takatsu-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Tamagawa Office of Canon Inc. (56) References JP-A-63-100666 (JP, A) ( 58) Field surveyed (Int. Cl. ⁶ , DB name) G11B 17/32-17/34

Claims (1)

(57) [Claims] A magnetic head, a head support projecting and supporting the magnetic head, and generating a negative pressure when the magnetic disk rotates to attract the magnetic disk; and a head support via the magnetic disk. A regulating member that is disposed on the opposite side and regulates the maximum separation amount of the magnetic disk from the head support, and the surface of the head support that faces the magnetic disk is inclined, In a magnetic disk drive device in which an upstream portion in a disk rotation direction is closer to a free rotation surface of a magnetic disk than a downstream portion, the regulating member is disposed downstream of the magnetic head in the magnetic disk rotation direction near the head support in the vicinity of the head support. And the lower end of the regulating member is positioned closer to the head support than the free rotation surface of the magnetic disk. Isku drive.