KR100750103B1 - Disk cartridge and Clamping apparatus - Google Patents

Abstract

Disclosed are a clamping device for clamping a disc cartridge and a disc housed therein. The disclosed disc cartridge includes an upper case and a lower case rotatably housing a disc provided with a clamper, and a shutter for opening and closing an opening hole formed in the upper case and the lower case, and the lower case allows the clamper to be exposed. An opening is formed to be recessed from the surface of the lower case toward the disk, and an edge portion formed around the opening is provided. According to this configuration, the disk cartridge is deformed only when the disk is not tilted when the clamping is released, so that the disk cartridge can be slimmed.

Description

Disk cartridge and clamping device for clamping the disk housed therein {Disk cartridge and Clamping apparatus}

1 is a perspective view showing a disc cartridge used in a conventional slot-in scheme;

2 is a view showing a state when the disc cartridge shown in FIG. 1 is loaded;

3 is a view showing a state when the disc cartridge shown in FIG. 1 is unloaded,

4 is a perspective view of a disk cartridge according to the present invention;

5 is a view showing a state when the disc cartridge shown in FIG. 4 is loaded,

6a is a plan view of a hub of the spindle motor shown in FIG.

6B is a cross-sectional view taken along the line C-C shown in FIG. 6A;

FIG. 6C is a cross-sectional view taken along line D-D shown in FIG. 6A;

FIG. 7 shows a state when the disc cartridge shown in FIG. 4 is unloaded. FIG.

<Description of the symbols for the main parts of the drawings>

30 ... disc cartridge 31,32 ... upper case

33 ... Opening 33a ... Edge

34.Opening hole 35.Shutter                 

40 ... clamper 42 ... concave

43 ... sliding part 60 ... spindle motor hub

61 ... Magnet 70 ... Guide Hub

72 convex 73 groove

74 Vertical Section 75 Inclined Section

76.Guide part

The present invention relates to a disc cartridge and a clamping device for clamping a disc housed therein, and more particularly, to an improved disc cartridge for minimizing the amount of displacement of a disc up and down when the disc cartridge is unloaded from the disc drive device. And a clamping device for clamping the disc accommodated therein.

1 is a perspective view showing a disc cartridge used in a conventional slot-in method. Referring to FIG. 1, a disc cartridge 10 generally used in a slot-in method is a disc D for recording and reproducing data in an internal space formed by the upper case 11 and the lower case 12 overlapping each other. ) Is stored. One surface of the disk D is fixedly installed with a clamper 13 coupled to a spindle motor (not shown) of the disk drive device. An opening 15 is formed in the lower case 12 so that the clamper 13 is always exposed to the outside. An opening hole 14 is formed in the upper case 11 and the lower case 12, and a shutter 16 is installed to surround the upper case 11 and the lower case 12.

FIG. 2 is a cross-sectional view showing a state when the disc cartridge shown in FIG. 1 is loaded, and FIG. 3 is a cross-sectional view showing a state when the disc cartridge shown in FIG. 1 is unloaded.

First, referring to FIG. 2, the clamper 13 is made of a metallic material, and a hole 13a is formed at the center thereof so that the convex portion 22 may be inserted and connected thereto. An inclined portion 13b is formed around the hole 13a.

The hub 20 is fitted to the rotating shaft S of the spindle motor. The convex part 22 is formed in the center of the hub 20, and the groove part 23 is formed around the convex part 22. A vertical portion 24 is formed at an inner edge of the groove 23, and a guide portion 25 inclined at a predetermined angle is formed at an outer edge thereof.

The hub 20 is provided with a magnet portion 26. The magnet part 26 generates a magnetic force to seat the clamper 13 in the groove part 23 when the disc cartridge 10 is loaded into the disc drive device.

When the disc cartridge 10 is pushed into the disc drive device in the direction of arrow A, the shutter 16 is opened by the opening means, and the disc cartridge 10 is locked to the disc drive device by a locking device (not shown).

At this time, the disk D is accurately clamped to the hub 20 by being inserted into the convex portion 22 of the hub 20 in the hole 13a. Even if the disc D is not centered with the convex portion 22 of the hub 20, the inclined portion 13b of the clamper 13 is guided by the magnetic force of the magnet portion 26 during loading. As the clamper 13 is seated in the groove 23 while sliding along the 25, the disk D is accurately clamped to the hub 20.

Referring to FIG. 3, since the disk D is accommodated to allow a certain amount of flow in the upper and lower cases 11 and 12, the disk cartridge is in a state in which the clamper 13 is coupled to the hub 20. Push (10) in the direction of loading (arrow A direction shown in FIG. 2). Then, the disc cartridge 10 is unlocked from the locking device (not shown) by the pushing force, and is unloaded in the direction of the arrow B by the elasticity provided by the locking device. At this time, the edge portion 15a formed around the opening 15 allows the clamper 13 to be spaced apart from the hub 20 while passing between the contact surfaces of the clamper 13 and the hub 20. .

Here, since the edge portion 15a passes between the contact surface of the clamper 13 and the hub 20, the clamper 13 is raised by H. For this reason, the disk D also rotates by H. When the disk D is tilted by H, the disk D is in contact with the upper and lower cases 11 and 12 to be interfered with. Therefore, the thickness of the disk cartridge 10 should be thick as much as the disk D is tilted in order not to be interfered with.

Therefore, when the disk D is tilted when the disk cartridge 10 is unloaded, the disk cartridge 10 must be thickened, thereby preventing the slimming of the disk cartridge and the miniaturization and slimming of the disk drive device.

       Disclosure of Invention The present invention has been made in view of the above problems, and the present invention provides a clamping disc cartridge and a disc housed therein, the structure of which is improved to minimize the amount of up and down displacement of the disc when the slot-in disc cartridge is unloaded from the disc drive device. It is an object of the present invention to provide a clamping device.

In order to achieve the above object, the disc cartridge of the present invention is a disc cartridge having an upper case and a lower case rotatably housing a disc provided with a clamper, and a shutter for opening and closing the opening holes formed in the upper case and the lower case.
The lower case allows the clamper to be exposed, and has an opening formed to dent into the disk from the surface of the lower case, and an edge portion formed around the opening.
According to another aspect of the present invention, a clamping device includes: a clamper provided on one surface of a disk rotatably received in an upper case and a lower case of a disk drive;
A guide hub provided on a shaft of the spindle motor and formed to be connected to the clamper, and a groove formed at a predetermined depth along a circumference of the block;
And a spindle motor hub disposed below the guide hub on a shaft of the spindle motor, the spindle motor having a magnet portion fixing the clamper to the guide hub.
According to the present invention, the groove portion is formed at the inner edge thereof, a pair of vertical portions facing each other and a pair of inclined portions positioned to be perpendicular to each other with the vertical portion, along the outer edge thereof It is provided with a guide portion formed obliquely at an angle.
According to the present invention, when the disc cartridge is loaded, the vertical portion is positioned to be parallel to the direction in which the disc cartridge is loaded, and when the disc cartridge is unloaded, the inclined portion is unloaded. It is located parallel to the direction.

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Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 4 is a perspective view showing a disk cartridge according to the present invention, Figure 5 is a view showing a state when the disk cartridge shown in Figure 4 is loaded.

4 and 5, the disc cartridge 30 according to the present invention is rotatably housed in the upper and lower cases 31 and 32. The upper and lower cases 31 and 32 are formed with opening holes 34 for accessing the disk drive to the disk D.

The disk D is provided with a clamper 40 at the center thereof. The clamper 40 is formed with a recess 41 so that the convex portion 72 of the guide hub 70 can be connected correspondingly. A sliding portion 43 is formed around the outer circumference of the recess 41.

An opening 33 is provided at the center of the lower case 32 so that the guide hub 70, which will be described later, approaches the clamper 40. The opening 33 is formed to be recessed into a predetermined depth from the surface of the lower case 32. Therefore, the opening 33 is located closer to the disk D than the surface of the lower case 32. Here, the part formed around the opening 33 is called the edge part 33a for convenience. The shutter 35 is provided on the opening 33 and the opening 34. The shutter 35 is installed to open and close the opening 33, so that even if the opening 33 is not opened, foreign matter such as dust flows into the disk D. To prevent this.

FIG. 6A is a plan view of the hub of the spindle motor shown in FIG. 5, FIG. 6B is a cross-sectional view taken along line CC shown in FIG. 6A, and FIG. 6C is a cross-sectional view taken along line DD shown in FIG. 6A, FIG. 7 is a diagram showing a state when the disc cartridge shown in FIG. 4 is unloaded.

6A to 6C, the spindle motor hub 60 and the guide hub 70 are installed on the shaft 51 of the spindle motor. The spindle motor hub 60 is provided with a magnet 61 for fixing the clamper 40 by magnetic force. Unlike the related art, the magnet part 61 is installed below the guide hub 70, which is intended to reduce the diameter of the opening 33 and to prevent the inflow of foreign substances such as dust. .

The guide hub 70 is provided with a convex portion 72 formed to protrude a predetermined length from the base plate 71 so that the guide hub 70 can be inserted into and connected to the recess 41 of the clamper 40.

A groove 73 is formed around the convex portion 72, and a vertical portion 74 and an inclined portion 75 are formed along an inner edge of the groove portion 73. Guide portion 76 inclined at a constant angle is formed at the outer edge.                     

When the disc cartridge 30 is loaded into the disc drive device in the guide portion 76, the clamper 40 is guided by the magnetic force of the magnet portion 61, so that the sliding portion 43 is the guide portion 76. Sliding along the movement is seated in the groove portion 73 of the guide hub (70).

The vertical portion 74 and the inclined portion 75 are integrally connected along the inner edge of the groove portion 73 so as to be perpendicular to each other.

Thus, as shown in FIG. 5, when the disc cartridge 30 is loaded into the disc drive device, the vertical portion 74 is positioned parallel to the direction in which the disc cartridge 30 is loaded, as shown in FIG. 6A. As such, the inclined portion 75 is positioned in a direction perpendicular to the vertical portion 74. That is, when the disc cartridge 30 is loaded into the disc drive device, the state of the guide hub 70 is the state shown in Fig. 6B.

On the other hand, the disk drive device is equipped with a sensor (not shown), when the unloading the disk cartridge 30, the sensor recognizes this, the spindle motor 50 is adjusted so that the inclined portion 75 is shown in Figure 6c It is located as shown in. That is, the spindle motor 50 is rotated so that the inclined portion 75 moves to the position where the vertical portion 74 is located as shown in FIG. 6B, and the vertical portion 74 is the inclined portion ( 75) will be located where it was. In addition, an ejection device is required to separate and separate the clamper 40 from the guide hub 70.

Referring to FIG. 7, the ejection device may be installed as a separate device and installed in a disk drive device. In the present invention, the edge portion 33a of the opening 33 formed in the lower case 32 is used. That is, since the disk D is accommodated so as to be able to flow in the upper and lower cases 31 and 32, the disk D is guided by the clamper 40 and the magnet part 61. In the state connected to the disk (D) and the spindle motor 50 moves in one.

Therefore, the upper and lower cases 31 and 32 can move freely to the disk D to some extent. When the disc cartridge 30 is pushed in the loading direction from the outside, the disc cartridge 30 is released from the locking device (not shown), and the disc cartridge 30 is unloaded by the reaction force that is released from the locking device. Move in the direction of At this time, since the edge portion 33a moves in the unloading direction while pushing the clamper 40, the clamper 40 is spaced apart from the magnet portion 61.

In the above configuration, the operation of loading and unloading the disc cartridge will be described.

5 to 7, when the disc cartridge 30 is pushed and loaded into the disc drive device, the shutter 35 is opened by a lever (not shown), so that the opening 33 and the opening hole 34 are opened. This is exposed to the outside. At this time, since the clamper 40 is pulled toward the guide hub 70 by the magnetic force of the magnet part 61, the sliding part 43 of the clamper 40 slides along the guide part 76 while the groove part ( 73). When the disc cartridge 30 is completely loaded, it is locked by the locking device.

 The vertical portion 74 of the guide hub 70 should always be located parallel to the loading direction when the disc cartridge 30 is loaded. This is possible by controlling the spindle motor by a sensor installed in the disk drive unit.

On the other hand, when unloading the disk cartridge 30, the disk cartridge 30 is pushed in the loading direction. Then, the sensor recognizes this and the spindle motor 50 is controlled so that the inclined portion 75 of the guide hub 70 is positioned parallel to the direction in which the disc cartridge 30 is loaded.

The disc cartridge 30 is released from the locking device and moves in the unloaded direction. At this time, the edge portion 33a is unloaded while pushing the clamper 40. Then, the sliding portion 43 of the clamp 40 slides along the inclined portion 75 of the guide hub 70 and is spaced apart from the magnet portion 24 so that the disc cartridge 30 is unloaded.

Since the sliding portion 43 slides along the inclined portion 75, the disk D is unloaded while maintaining equilibrium without tilting. That is, the disk D moves while maintaining a balance up by only G corresponding to the height at which the clamper 40 is seated in the groove 73. Therefore, the disk cartridge according to the present invention can move the disk cartridge according to the present invention only because the disk cartridge according to the present invention moves only in the upward direction, and thus the displacement amount can be reduced, thereby reducing the thickness of the disk cartridge.

As described above, the disc cartridge according to the present invention and the clamping device for clamping the disc accommodated therein reduce the thickness of the disc cartridge since the disc cartridge is displaced only upward without tilting when the disc cartridge is unloaded from the disc drive device. It can be effective.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and variations can be made therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (4)

A disc cartridge comprising an upper case and a lower case rotatably accommodating a disk provided with a clamper, and a shutter for opening and closing an opening hole formed in the upper case and the lower case. The lower case is to expose the clamper, the disc cartridge, characterized in that it comprises an opening formed to be recessed from the surface of the lower case toward the disk, and an edge portion formed around the opening. A clamper provided on one surface of a disk rotatably received in an upper case and a lower case of the disk drive; A guide hub provided on a shaft of the spindle motor and formed to be connected to the clamper, and a groove formed at a predetermined depth along a circumference of the block; And a spindle motor hub disposed below the guide hub on a shaft of the spindle motor, the spindle motor hub having a magnet for fixing the clamper to the guide hub. The method of claim 2, The groove portion A pair of vertical portions facing each other, a pair of inclined portions positioned at right angles to the vertical portion, and a guide formed obliquely at a predetermined angle along the outer edge thereof; Clamping apparatus comprising a portion. The method of claim 3, wherein When the disc cartridge is loaded, the vertical portion is positioned to be parallel to the direction in which the disc cartridge is loaded, and when the disc cartridge is unloaded, the inclined portion is parallel to the direction in which the disc cartridge is unloaded. Clamping device, characterized in that located.

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