JPH0555339U - Disk device - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a disc device having a mechanism for clamping a disc without biting the center hole when a flexible disc is used. .. [Structure] A guide pin 10 is provided above a spindle hub 3 for rotating a disk, concentrically with its rotation shaft. Guide pins 11 are provided on the spindle hub 3 concentrically with the rotation axis thereof.
To provide. A guide hole 13a is provided at the center of the collet 9, and the guide hole 13a is loosely fitted to the guide pins 10 and 11 so that the collet 9 is vertically guided and moves up and down.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a disk device, and more particularly to a disk device that holds a disk by a collet and a spindle hub and rotates the disk.

[0002]

[Prior Art]

 FIG. 4 is an exploded perspective view of a conventional magnetic disk device on which a 5-inch flexible magnetic disk can be mounted with one touch.

In FIG. 1, the disc in the jacket is inserted in the direction of arrow C and reaches a predetermined mounting position while pushing the contact portion 2 a of the ratch lever 2.

At this time, the center hole of the magnetic disk (not shown) substantially coincides with the spindle hub 3.

The rotational movement of the latch lever 2 pushed by the disc jacket is converted into the rotational movement of the clamp arm 6 via the slide lever 4 and the link arm 5, and the plate fixed to the tip of the clamp arm 6 is converted. The collet 9 locked by the spring 7 descends. As a result, the magnetic disk (not shown) in the disk case is clamped by the collet 9 and the spindle hub 3.

Here, since the vertical movement of the collet 9 is obtained by the rotational movement of the clamp arm 6, the collet 9 moves vertically downward with respect to the spindle hub 3 and is fixed in a regular position. It is attached to the leaf spring 7 with a certain degree of freedom.

That is, the collet 9 is supported from both sides by the leaf spring 7 as shown in FIG. 4, and can be slightly rotated about an axis connecting the two supported points.

[0008]

[Problems to be solved by the device]

 However, since the position of the center hole of the magnetic disk is not fixed with respect to the jacket and the magnetic disk insertion part of the magnetic disk device has some play, when the magnetic disk is inserted, the spindle hub and the magnetic disk are The center hole may have considerable misalignment.

As described above, when the collet 9 descends with the positional deviation, the collet 9 is tilted and fixed at the clamp position, and the center wheel of the magnetic disk is caught as shown in FIG. It will be installed.

In this case, the magnetic disk is mounted eccentrically, and the center hole may be damaged.

In order to prevent the magnetic disk from being caught, it is necessary to maintain the centering of the collet with high precision, which requires high precision of parts and fine adjustment after assembly. However, there is a problem in that the cost increases and the space for fine adjustment cannot be secured.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a disk device that can be reliably clamped by a simple mechanism without the disk being caught.

[0013]

[Means for Solving the Problems]

 The invention of claim 1 is a disk device comprising: a collet attached to a tip of a clamp arm; and a spindle hub for holding the disk between the collet and rotating the disk. A first guide pin arranged perpendicular to the mounting surface is provided on the base, and the collet has a guide hole guided by the first guide pin.

According to a second aspect of the present invention, the spindle hub has a second guide pin that is mounted perpendicularly to a disc mounting surface and is loosely fitted in a guide hole of the collet to guide the collet. And

[0015]

[Action]

 In the invention of claim 1, the guide hole provided in the collet is loosely fitted to the guide pin so that the collet moves vertically without being inclined with respect to the disk mounting surface of the spindle hub.

In the invention of claim 2, the second guide pin is loosely fitted into the guide hole after the guide hole of the collet is separated from the guide pin, and the collet is inclined with respect to the disc mounting surface of the spindle hub. Instead, it works to move vertically up and down.

[0017]

【Example】

 FIG. 1 is an enlarged sectional view showing a structure of a clamp portion of a magnetic disk which is an essential part of one embodiment of the present invention, and FIG. 2 is an exploded perspective view of the embodiment of FIG.

In both figures, the same components as those of the conventional example shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 2, the guide pin mounting plate 17 is located below the collet 9 and is fixed to the base 8. A guide pin 10 is vertically attached above the collet 9 of the guide pin 17.

A guide pin 11 is vertically attached to the center of rotation of the spindle hub 3.

FIG. 1 shows the positional relationship between the collet 9 and the spindle hub 3 before mounting the magnetic disk. The collet 9 is located at the uppermost position, and the magnetic disk (not shown) is provided between the collet 9 and the spindle hub 3. Space is formed to insert the ().

Here, in the collet 9, a collet center 13 and a collet body 12 are integrally formed via a bearing 13, and the collet body 12 is rotatable with respect to the collet center 13.

A guide hole 13 a is formed at the center of the collet center 13, and the collet 13 is swingably attached by a leaf spring 7.

The guide pin 10 is fixed concentrically with respect to the rotation axis of the spindle hub, and is fixed to a guide pin mounting plate 17 fixed to the base 8.

A guide hole 13a of the collet 9 is loosely fitted in the guide pin 10, the collet 9 is positioned parallel to the spindle hub, and the descending movement direction is also perpendicular to the magnetic disk mounting surface 3a of the spindle hub. Become.

The guide pin 11 is concentrically attached to the rotary shaft of the spindle hub 3, and the tip end thereof is thin so that it can be easily inserted into the guide hole of the collet 9.

Next, the clamp operation of the magnetic disk will be described with reference to FIG.

As shown in (A), when the magnetic disk is inserted and the center hole of the magnetic disk reaches the position of the spindle hub, the clamp arm 6 (see FIG. 2) rotates. Then, the collet center 13, that is, the collet 9 moves in the direction of the spindle hub 3 via the leaf spring 7 fixed to the tip of the clamp arm 6.

The movement of the collet 9 is guided by the guide pin 10 and limited to the direction perpendicular to the magnetic disk mounting surface of the spindle hub 3.

Further, since the guide pin 10 is positioned concentrically with respect to the rotation axis of the spindle hub 3, there is no displacement between the collet 9 and the spindle hub 3. Therefore, even if the center hole of the magnetic disk 16 is deviated from the regular mounting position, the magnetic disk 16 is guided by the inclination of the side surface 12a of the collet 9 and guided to the regular position before being completely clamped. It

Next, as shown in (B), when the guide hole 13a of the collet 9 is lowered to a position where it is separated from the guide pin 10, the tip of the guide hole 13a reaches the guide pin 11 and the guide pin 11 and the guide hole 13a are reached. Is loosely fitted. Therefore, the movement of the collet 9 is subsequently limited only to the vertical direction.

Then, as shown in (C), the disc 16 guided to the regular clamp position is clamped by the collet 9 and the spindle hub 3, and the clamp operation is completed.

Since the collet 9 is guided by the guide pin 10 as described above, the magnetic disk 16 can be guided to the normal clamping position and clamped without the collet tilting.

Further, the guide pin 11 guides the collet 9 even after the collet 9 is separated from the guide pin 10, so that the clamp operation of the collet 9 without inclination can be further ensured.

[0035]

[Effect of the device]

 As described above, according to the first aspect of the present invention, the size of the disk device having the clamp mechanism without the biting of the disk is increased by the simple structure in which the guide hole is provided in the collet and the guide pin is arranged above the collet. It can be manufactured at low cost.

According to the second aspect of the present invention, by providing the guide pin on the spindle hub side as well, it is possible to obtain the disk device capable of preventing the disk from being bite more reliably.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part of an embodiment of the present invention.

2 is an exploded perspective view of the embodiment of FIG. 1. FIG.

FIG. 3 is a diagram illustrating a clamp operation.

FIG. 4 is an exploded perspective view of a conventional magnetic disk device.

5 is an enlarged cross-sectional view of the clamp portion of the conventional example of FIG.

[Explanation of symbols]

 1, 15 magnetic disk device 3 spindle hub 3a inner surface 3b magnetic disk mounting surface 6 clamp arm 7 leaf spring 8 base 8a extension 9 collet 10, 11 guide pin 12 collet body 12a side 13 collet center 13a guide hole 14 bearing 16 Magnetic disk

Claims (2)

[Scope of utility model registration request] 1. A disc device comprising: a collet attached to a tip of a clamp arm; and a spindle hub for holding the disc between the collet and rotating the disc, wherein a disc mounting surface of the spindle hub is provided. A disk device in which a first guide pin arranged vertically to the base is provided on a base, and the collet has a guide hole guided by the first guide pin. 2. The spindle hub has a second guide pin that is mounted perpendicularly to a disc mounting surface and is loosely fitted in a guide hole of the collet to guide the collet. Disk device.