JPH0222458B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic disk clamping device,
More specifically, the present invention relates to a structure for attaching a cone that holds a magnetic disk as a recording medium.

A conventional magnetic disk clamping device for a magnetic disk device was constructed as shown in FIG. That is, a cone 4 formed of plastic stick or the like that centers the magnetic disk 6 at the time of startup.
It has a structure in which a magnetic disk 6 is held and rotated by a spindle 5 which is rotated by the drive of a motor (not shown). and cone 4
The guide sleeve 2 which rotatably supports the load arm 1 passes through a through hole provided in the load arm 1 and is supported by the load arm 1 by fitting an E ring 3 into a groove formed on the outer periphery of the end thereof. .

In order to grip and rotate the magnetic disk 6 with the above configuration, the magnetic disk 6 is first placed on the spindle 5, and the load arm 1 is moved around the fulcrum of the load arm (not shown) at the first The magnetic disk 6 is swung from the position indicated by P in the figure to the position indicated by Q, and the magnetic disk 6 is held between the cone 4 and the spindle 5. Thereafter, by rotating the spindle 5 by driving the motor, the magnetic disk 6 is held between the cone 4 and the spindle 5 and driven to rotate.

In order to rotate the disk with high rotational precision in the conventional magnetic disk clamp device as described above, it is necessary to ensure that the upper surface of the spindle 5 always rotates in the same rotational plane, and that the cone 4 and spindle 5
It is necessary that the rotational axes of the discs are aligned when the discs are clamped. For this reason, the machining accuracy of each component,
Strict assembly accuracy is required. for example,
If the fulcrum position of load arm 1 is too high,
This results in a supported state as shown in the figure. In FIG. 2, the rotational axes of the cone 4 and spindle 5 do not match, and the magnetic disk 6 is held by points rather than by surfaces, which not only makes it impossible to maintain rotational accuracy, but also I ended up injuring 6.

The present invention has been made in view of the above points, and an object of the present invention is to provide a magnetic disk clamping device that can accurately rotate the disk even if the machining accuracy and assembly accuracy of each member are not very high. shall be.

In order to achieve the above object, the present invention adopts a structure in which the cone is attached to the load arm so that it can swing freely in a predetermined direction and can move in a direction substantially perpendicular to the swinging direction. .

The present invention will be described in detail below with reference to the drawings. Figure 3 and the following illustrate one embodiment of the present invention.
The same or similar parts as in FIGS. 1 and 2 are designated by the same reference numerals.

FIG. 3A shows a front view of the cone attachment part of the present invention, and FIG. 3B shows a side view thereof. That is, the load arm 1 has a U-shape.
A guide sleeve mounting shaft 7 is attached by penetrating through a hole provided at the end of the guide sleeve and securing both sides with E-rings 3. The guide sleeve 2 is attached to the center of the guide sleeve mounting shaft 7.
is a motion fit and is positioned by E-rings on either side of it. A cone 4 is rotatably supported at the tip of the guide sleeve 2, as in the conventional example.

In the above configuration, in order to perform disk clamping, the load arm 1 is swung around a fulcrum (not shown) as in the conventional example, and the magnetic disk 6 placed on the spindle 5 is moved between the cone 4 and the spindle. 5. The guide sleeve 2 is movably fitted onto the mounting shaft 7, and has some play in the direction of the mounting shaft, as shown by the arrows in Figures 3A and 3B, but is free to swing in the direction of the load arm. Therefore, even if the fulcrum of the load arm 1 is located somewhat too high or too low, the rotational axis of the cone 4 will be perpendicular to the rotational surface of the spindle 5. In other words, when clamping, the rotation centers of the cone and spindle are substantially aligned to securely hold the disk.

In the embodiments described above, the cone 4 is firmly supported by the guide sleeve 2, but if the cone 4 is supported by a suspension such as a coil spring, the stability with respect to the magnetic disk 6 can be further improved.

As is clear from the above description, in the magnetic disk clamping device according to the present invention, the magnetic disk clamping device clamps the magnetic disk between the cone and the spindle by swinging the load arm to which the cone is attached relative to the spindle. The cone is attached to the load arm so as to be swingable in a predetermined direction and movable in a direction substantially orthogonal to the swing direction, and the rotation centers of the cone and spindle are substantially aligned when clamped. As a result, even if the assembly accuracy such as mounting the load arm or the machining accuracy of each component is somewhat low, the cone and spindle can always grip the magnetic disk through surface contact, and the rotation accuracy can be maintained without damaging the magnetic disk. The excellent effect of being able to perform high rotational drive is obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram illustrating the structure and operation of a conventional magnetic disk clamping device, FIG. 2 is a side view illustrating the operation of a conventional magnetic disk clamping device, and FIG. 3A is an embodiment of the present invention. Example front view,
FIG. 3B is a side view thereof, and FIG. 4 is a partially cutaway side view illustrating the operation of an embodiment of the present invention. 1...Load arm, 2...Guide sleeve, 3...
E-ring, 4... Cone, 5... Spindle, 6... Magnetic disk, 7... Guide sleeve mounting shaft.

Claims (1)

[Claims] 1. A magnetic disk clamping device that clamps a magnetic disk between the cone and the spindle by swinging a load arm to which a cone is attached relative to a spindle, the cone being swingable in a predetermined direction relative to the load arm and mounted so as to be movable in a direction substantially perpendicular to the direction of rocking;
A magnetic disk clamping device characterized in that the centers of rotation of the cone and spindle are substantially aligned during clamping.