JP2000228044A - Disk loading mechanism for disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of production and a thickness by feeding a disk by deforming a disk feed roller which is put with a rubber tube of an equal thickness to a columnar shaft in such a manner that the part in contact with a disk is recessed. SOLUTION: A shaft 2 has a fine columnar shape and the rubber tube 3 of the equal thickness is put on this shaft, by which the disk feed roller 1 is formed. The shaft 2 is freely rotatably supported on a roller holding chassis 5 and is rotated by a rotary drive mechanism. A disk guide 4 is fixed to face the disk feed roller 1 and the disk 6 inserted between the disk feed roller 1 and the disk guide 4 is held between the disk feed roller 1 and the disk guide 4 by the elastic force of the disk feed roller 1 and is sent by the rotary frictional force of the disk feed roller 1. When the disk feed roller 1 holds the disk, the shaft 2 is elastically deformed and the disk feed roller 1 is brought into contact with only the periphery of the disk and, therefore, the disk is kept free from damage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk loading mechanism for a disk drive, and more particularly to a disk loading mechanism that does not use a drum-shaped disk feed roller and does not scratch the disk.

[0002]

2. Description of the Related Art In a disk loading mechanism for feeding a disk by the rotational frictional force of an elastic feed roller, if the roller is straight, the roller may directly contact the disk surface and apply frictional force, possibly damaging the disk. There is.

FIG. 4 shows an example of a conventional disk loading mechanism of a conventional disk drive which does not damage the disk. A rubber roller 9 is put on a shaft 8 shown in the figure to form a disk feed roller 7.
The shaft 8 is rotatably supported by the roller holding chassis 5 and is rotated by a rotation drive mechanism (not shown).

A disk guide 4 is fixed opposite the disk feed roller 7, and the disk 6 inserted between the disk feed roller 7 and the disk guide 4 is separated from the disk feed roller 7 by the elasticity of the disk feed roller 7. It is held by the disk guide 4 and fed by the rotational frictional force of the disk feed roller 7. Since the disk feed roller 7 and the disk guide 4 are concave on the side with respect to the disk 6, they do not come into contact with the disk surface, and the disk is not damaged.

FIG. 5 is a sectional view showing the disk feed roller 7. A sleeve 10 is fitted in the center of a cylindrical shaft 8 shown in the figure, and tapered rubber rollers 9 are fitted on both sides thereof.

FIG. 6 shows another example of a disk feed roller having a similar function. In this example, the tapered shaft 8
A rubber layer 9a is welded to the surface of a.

[0007]

In the above-described conventional disk loading mechanism, it is necessary to manufacture a dedicated rubber roller or a tapered shaft having a tapered shape, and the manufacturing cost has been increased. Further, since the disk feed roller has a tapered shape, the outer diameter of the roller cannot be reduced, and there has been a problem that the apparatus cannot be made thin.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a disk loading mechanism for a disk drive that can be manufactured at a low cost and can be made thinner. Is to do.

[0009]

A disk loading mechanism of a disk drive according to the present invention is obtained by deforming a disk feed roller in which a cylindrical shaft is covered with a rubber tube having an equal thickness so that a disk contact portion is concave. It is configured to send a disk.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk loading mechanism of a disk drive according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing a main part of a disk loading mechanism of a disk device according to an embodiment of the present invention.

The shaft 2 shown in the figure has a cylindrical shape smaller than that of the conventional shaft, and is covered with a rubber tube 3 having a uniform thickness to form the disk feed roller 1. The shaft 2 is rotatably supported by a roller holding chassis 5, and is rotated by a rotation drive mechanism (not shown).

A disk guide 4 is fixed opposite to the disk feed roller 1, and the disk 6 inserted between the disk feed roller 1 and the disk guide 4 is separated from the disk feed roller 1 by the elasticity of the disk feed roller 1. It is held by the disk guide 4 and fed by the rotational frictional force of the disk feed roller 1.

When the disk feed roller 1 grips the disk, the shaft 2 is elastically deformed and the disk feed roller 1
The disk contacts only the periphery of the disk, so that the disk is not damaged. A belt or the like is used for power transmission in order to absorb the inclination of the shaft outside the bearing.

FIG. 2 shows a model of the deformation of the disk feed roller. Assuming that a concentrated load P is applied to the points C and D shown in the figure, the deflections δ _c and δ _{d at the} points C and D are δ _c =
δ _d = Pm ² (3l−4m) / 6EI. Here, m and l are the distances shown in the figure, E is the elastic modulus, and I is the second moment of area. The deflection δ _{max of the} central part is δ _max = Pm
(3l ² -4m ² ) / 24EI. The deflection angle θ _max of the bearing part when receiving a single concentrated load at the center is
θ _max = Pl ² / 16EI.

Assuming that a stainless steel shaft has a diameter of φ1.5, a bearing span is 124 mm, m at a clamp position of a 12 cm disk is 14 mm, and a roller pressing force is 400 g,
The above values are δ _c = δ _d = 0.4 mm, δmax =
1.1 mm, θ _max = 4.4 °.

FIG. 3 shows a disk feed roller of a disk loading mechanism according to another embodiment of the present invention. In this example, a resin sleeve 2a is fitted in the center of a thin cylindrical shaft 2 shown in the figure, and rubber tubes 3 of uniform thickness are fitted on both sides thereof. The disk loading mechanism of the present invention can also be constituted by using the disk feed roller formed as described above.

[0017]

According to the disk loading mechanism of the disk device of the present invention, a straight shaft having a simple shape can be used without using a dedicated rubber roller or an expensive deformed shaft, so that the manufacturing cost can be reduced.

Further, since a disk feed roller having a uniform diameter is used, a tapered space is not required as compared with a tapered shaft, and the apparatus can be made thin.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a disk loading mechanism of a disk device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a deformation of a feed roller of the disc loading mechanism.

FIG. 3 is a sectional view showing a disk feed roller of a disk loading mechanism according to another embodiment of the present invention.

FIG. 4 is a front view showing an example of a disk loading mechanism of a conventional disk device.

FIG. 5 is a sectional view showing an example of a disk feed roller of the disk loading mechanism.

FIG. 6 is a cross-sectional view showing another example of a disk feed roller of the disk loading mechanism.

[Explanation of symbols]

 Reference Signs List 1 disc feed roller 2 shaft, 2a resin sleeve 3 rubber tube 4 disc guide 5 roller holding chassis 6 disc 7 disc feed roller 8 shaft, 8a tapered shaft 9 rubber roller, 9a rubber layer 10 sleeve

Claims (1)

[Claims] 1. A disk loading mechanism for a disk drive configured to feed a disk by deforming a disk feed roller in which a cylindrical shaft is covered with a rubber tube of equal thickness so that a disk contact portion is concave.