KR100604021B1 - Optical Disk Drive - Google Patents

Abstract

According to an embodiment of the present invention, an optical disk drive has a burring portion formed on a frame wall, and a notebook computer body structure and a main chassis are screwed and fixed. The ejection shaft is installed in the main body, and the eject shaft, in which the coil spring is axially coupled, is installed in the tray moving direction so as to add an elastic force of an appropriate size to the tray during the storage and withdrawal. A part of the bottom surface of the main chassis is cut out in front of the burring portion among the frame walls contacting the shaft, and a portion of the cut bottom surface is bent upward to come into contact with the eject shaft so that the eject shaft moves toward the burring portion side. To form a shaft ground that prevents And a gong.

The present invention forms a shaft grounding portion that is bent to a certain height from the bottom of the main chassis, thereby preventing direct mechanical contact between the eject shaft and the burring portion of the main chassis, while making the direct contact between the eject shaft and the main chassis to be made. It is effective to prevent the failure of the device by the static electricity.

Description

Optical Disk Drive {Optical Disk Drive}

1 is an exploded perspective view showing an optical disk drive of the prior art;

Figure 2a is a perspective view showing a state in which the tray of the optical disk drive of the prior art is coupled.

FIG. 2B is an enlarged perspective view of a portion A of FIG. 2A; FIG.

3 is a partial perspective view showing a state in which an interference prevention portion is formed between a burring portion and an eject shaft of a main chassis of the prior art;

Figure 4a is a perspective view showing the main chassis structure of the optical disk drive according to the present invention.

4B is a partially enlarged perspective view of part B of FIG. 4A.

5 is a partially enlarged front view of a shaft grounding portion according to the present invention;

Figure 6 is a partial perspective view showing an operating state of the optical disk drive according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: optical pickup 2: spindle motor

3: bottom cover 4: eject shaft

5: main chassis 5a: burring

5b: shaft ground portion 6: main PCB

7: Guide rack 7a: Interference prevention part

8: tray

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc drive, and more particularly, to an energizing structure between an eject shaft and a main chassis constituting the optical disc drive.

In general, an optical disc drive is widely used as an apparatus for recording or reproducing a signal on a large capacity optical recording medium (optical disc) such as a CD-R, a CD-RW, a DVD, and the like.

Optical disc drives can be used internally, such as on a desktop or laptop computer, or externally connected to a computer.

The optical disk drive includes a tray on which the disk is seated, a turntable for rotating the disk, and an optical pickup and PCB for recording or reading information on the disk.

When static electricity is input to such an optical disk drive, recording or reproducing performance is greatly influenced. In particular, when static electricity is input to a key component such as an optical pickup, it causes a fatal harm.

Therefore, it is necessary to design a conduction path to allow the static electricity input from the outside to be moved to the ground without being input to the core components such as the optical pickup.

1 is an exploded perspective view showing an optical disk drive according to the prior art, where a thick dotted line is used to describe a conductive path of static electricity introduced from the outside.

As shown in the figure, the static electricity introduced from the outside is in the order of the optical pickup (1), the spindle motor (2), the bottom cover (3) made of aluminum, the eject shaft (4), the main chassis (5) made of aluminum. It will have a current carrying path.

Figure 2a is a perspective view showing a state in which the tray of the optical disk drive of the prior art is coupled, Figure 2b is a partially enlarged perspective view of the portion A of Figure 2a.

As shown in the figure, a conventional optical disk drive allows a tray 8 for mounting an optical disk (not shown) on the top to be guide-coupled to the main chassis 5.

At this time, the main chassis 5 is mounted inside the main body of the notebook computer, and components such as an optical pickup (not shown) including the main PCB 6 are mounted thereon.

In addition, the tray 8 has an optical disk seated thereon, and is guided and coupled to the main chassis 5 so as to be stored and drawn out. The tray 8 maintains an appropriate elastic force in a moving direction during storage and withdrawal to achieve stable operation.

It is the eject shaft 4 used for this purpose. The eject shaft 4 is installed in the traveling direction of the tray 8, and a compression spring (not shown) is axially coupled to one end of the tray 8 to be installed below the tray 8. In addition, the other end of the eject shaft 4 is in contact with the main chassis 5 in accordance with the storage direction of the tray 8 to apply a spring pressure.

In this case, the eject shaft 4 is disposed to avoid mechanical interference with the components forming the main PCB 6 and various opening devices, but screwed to the contact portion with the main chassis 5 as much as possible. In order to process the burring portion 5a, the end of the ejecting shaft 4 of the burring portion 5a inevitably causes mechanical interference.

In order to solve the interference problem as described above, a method as shown in FIG. 3 is used.

3 is a partial perspective view illustrating a state in which an interference prevention part is formed between a burring part and an eject shaft of a main chassis of the related art.

As shown in the figure, in the prior art, the eject shaft 4 is prevented by an interference prevention part 7a formed from a plastic guide rack 7 installed between the eject shaft 4 and the main chassis 5. Mechanical interference is prevented.

In this case, however, mechanical interference is prevented, but insulation between the eject shaft 4 and the main chassis 5 is made by the guide rack 7 made of plastic, so that the conduction path is broken.

As the conduction path is cut off as described above, static electricity does not escape to the outside, stays inside the device, and enters major components such as an optical pickup, causing a mechanical failure.

The present invention has been proposed to solve the above problems, and an object of the present invention is to prevent the mechanical contact between the eject shaft and the burring portion of the main chassis, while making the direct contact between the eject shaft and the main chassis, the current path Is maintained.

The optical disk drive according to the present invention for achieving the above object is to form a burring portion in the frame wall is fixed to the notebook computer body structure and the main chassis screwed, the guide is coupled to the guide formed in the main chassis, The optical disk is mounted on the upper part of the tray to be stored and taken out inside the main body, and when the storage and withdrawal is carried out, an eject disk having an eject shaft in which the coil spring is axially coupled to add an elastic force of an appropriate size to the tray is installed in the tray moving direction. In the drive, during the storage and withdrawal, a portion of a bottom surface of the main chassis is cut out in front of the burring portion among the frame walls contacting the eject shaft, and a portion of the cut bottom surface is bent upward to the eject shaft. In contact with the eject shaft Shaft grounding block being characterized in that it forms part.

Here, when the width of the shaft ground portion W, it is characterized in that 2.6mm≤W.

Here, when the height from the bottom of the main chassis to the end of the bent shaft ground portion is H, it is characterized in that 4.4mm≤H≤7mm.

Here, the interference prevention portion extending from the guide rack between the bent shaft ground portion and the main chassis side wall is formed, and the interference ground prevents the shaft ground portion from being deformed by the axial pressure of the eject shaft. do.

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

Prior to the description of the drawings, the same reference numerals are used for the same parts as in the prior art.

4A is a perspective view illustrating a main chassis structure of the optical disk drive according to the present invention, and FIG. 4B is a partially enlarged perspective view of part B of FIG. 4A.

As shown in the figure, the main chassis 5 constituting the optical disk drive according to the present invention is a shaft for cutting a portion of the bottom portion, and bending the cut-up portion to the upper end of the eject shaft in the axial direction It is comprised by forming the ground part 5b.

At this time, the shaft grounding portion (5b) is formed so as to be located ahead of the axis line of the burring portion (5a) formed to screw the main chassis 5 and the main body.

The main chassis 5 is preferably made of aluminum.

5 is a partially enlarged front view showing a shaft ground portion according to the present invention, in which the shaft ground portion 5b is formed to be bent at a predetermined height from the bottom of the main chassis 5 as shown in FIG. (W) is preferably formed to be 2.6 mm or more wider than the diameter of the eject shaft 4, and the height H from the bottom of the main chassis 5 to the end of the bent shaft ground portion 5b is determined by the eject shaft ( Considering the installation height of 4), it is preferable to select it to be 4.4mm or more and 7mm or less.

Referring to the operation of the present invention having the above configuration as follows.

6 is a partial perspective view showing an operating state of the optical disk drive according to the present invention.

First, the tray 8 is pushed to apply a force in one direction to accommodate the tray 8 on which the optical disk (not shown) is seated.

In this case, as the eject shaft 4 is installed at the bottom of the tray 8, as shown in FIG. 6, a part of the eject shaft 4 protrudes to the outside, and a compression spring (not shown) at the remaining part which does not protrude. This shaft is in a state of applying pressure to the eject shaft 4 in one direction.

In the above state, the tray 8 continues to move forward, and after the end of the eject shaft 4 is grounded to the shaft grounding portion 5b, the tray 8 continues to move forward and is held in a fixed state by a separate stop means. .

Here, the shaft ground portion 5b is a state in which pressure by a compression spring (not shown) is continuously applied, and the shaft ground portion 5b may be deformed. As such, the interference preventing portion extending from the guide rack 7 is formed between the shaft ground portion 5b and the main chassis 5 so that the shaft ground portion 5b is deformed by the axial pressure of the eject shaft 4. Is prevented.

In such a state, the optical pickup and the spindle motor operate to read or write information recorded on the optical disk, and the generated static electricity is transmitted to the shaft ground portion 5b of the main chassis 5 through the eject shaft 4. ) Is energized and exits.

When the optical disk is to be replaced, the reverse process of the storing process is performed. First, when the stop means is released, the compression spring that is coupled and compressed on the shaft of the eject shaft 4 is expanded, and the shaft contact is made. The tray 8 is pushed from the branch portion 5b to advance in the drawing direction.

Then, the optical disk (not shown) may be replaced while the tray 8 is completely drawn out.

In the present invention as described above, by cutting the bottom of the main chassis 5 to form the integrated shaft ground portion 5b, it is possible to maintain the energization path.

The present invention forms a shaft grounding portion that is bent to a certain height from the bottom of the main chassis, thereby preventing direct mechanical contact between the eject shaft and the burring portion of the main chassis, while making the direct contact between the eject shaft and the main chassis to be made. It is effective to prevent the failure of the device by the static electricity.

Claims (4)

A burring portion is formed on the frame wall so that the notebook computer main body structure and the main chassis are screwed and fixed, and the tray is guided to the guide formed on the main chassis, and the optical disk is seated on the tray to be stored and drawn out inside the main body. In the storage and withdrawal, the optical disk drive in which the eject shaft in which the coil spring is axially coupled to the tray to add an elastic force of the appropriate size to the tray in the tray moving direction, In the storage and withdrawal, a portion of a bottom surface of the main chassis is cut out toward the burring portion among the frame walls contacting the eject shaft, and a portion of the cut bottom surface is bent upwards to contact the eject shaft. And a shaft ground portion for blocking an eject shaft from advancing toward the burring portion side. The method of claim 1, An optical disk drive, characterized in that 2.6mm ≤ W when the width of the shaft ground portion is W. The method of claim 1, Wherein the height from the bottom of the main chassis to the end of the bent shaft ground portion is H, wherein 4.4 mm ≦ H ≦ 7 mm. The method of claim 1, An interference preventing portion extending from the guide rack is formed between the bent shaft ground portion and the main chassis side wall, and the interference preventing portion prevents the shaft ground portion from being deformed by the axial pressure of the eject shaft. Disk drive.

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