KR20030024453A - Dummy disk and pickup protection apparatus for disk drive using the same - Google Patents

Abstract

PURPOSE: A dummy disk and a device for protecting a pick-up of a disk drive using the same are provided to prevent an impact of an outside shock from applying to the pick-up by restricting movement of the pick-up through a restrictive protrusion. CONSTITUTION: A pick-up base is installed on a main base(50) and includes a spindle motor(70) for rotating a disk, and a pick-up(75) for writing and reading signals. A tray(60) is placed on the pick-up base, goes in and out following the main base, and includes a disk securing part(62) for securing the disk on an upper surface(61). A dummy disk(80) is secured on the disk securing part to be fixed at one side of the spindle motor, and has a mounting through hole(84) formed in the center and a restrictive protrusion(87) formed at the opposite side of the spindle motor.

Description

Dummy disk and pickup protection apparatus for disk drive using the same}

The present invention relates to a disc drive, and more particularly, to a pickup protection device of a disc drive to limit the movement of the pickup to prevent damage to the pickup by an external impact.

1 shows a structure of a disc drive according to the prior art in a plan view. As shown therein, the main base 1 forms the frame of the disk drive. In the center of the main base (1) is formed a substantially rectangular through hole and the pickup is provided with a pickup base (3).

The rear end of the pickup base 3 is supported by the dustproof opening 5 on the main base 1. The dustproof opening 5 is formed of a material having elasticity, and supports the pickup base 3 to the main base 1 and blocks transmission of vibration and noise between them.

The pickup base 3 is provided with a spindle motor 7 for rotating the disk. The upper end of the spindle motor 7 is provided with a turntable 8 on which a disk is seated and rotated by rotation by the spindle motor 7. On the pickup base 3, the pickup 9 is installed to be guided along the guide shaft 10. The pickup 9 records the signal by irradiating light onto the signal recording surface of the disk or reads the recorded signal and is driven by a sled motor (not shown) and moved along the guide shaft 10.

On the other hand, the tip of the pickup base 3 is supported by the lifting base 12. Between the lifting base 12 and the pickup base 3 is also equipped with a dustproof opening (5 ') to support the pickup base (3) to the lifting base 12 and at the same time prevent the transmission of noise and vibration. .

The lifting base 12 is provided with a rotation center axis 13 at both ends thereof. The rotation center shaft 13 is inserted into the main base 1 to become a rotation center where the tip of the lifting base 12 is lifted. An interlocking protrusion 15 is formed at the tip of the elevating base 12 to guide the elevating cam 28 of the elevating guide 25 to be described below.

Next, a loading motor 17 is installed at the tip of the main base 1 to provide a driving force for loading and unloading of the disk. The driving force of the loading motor 17 is transmitted to the driving pulley 18 through the belt 19, and the gear part provided in the driving pulley 18 is engaged with the driving gear 20. The drive gear 20 is formed with a rack driving gear 22, the rack driving gear 22 is meshed with the rack gear provided in the tray (not shown) for mounting and loading and unloading the disk have.

On the other hand, the driven rack 27 of the elevating guide 25 is engaged with the gear portion (not shown) of the drive gear 20. The lifting guide 25 raises the tip end of the pickup base 3 at the end of the disc loading operation, and lowers the tip end of the pickup base 3 at the beginning of the disc unloading operation. To avoid interference during loading and unloading operations.

To this end, the lifting guide 25 has a lifting cam 28 is formed. The lifting cam 28 is inserted and guided by the interlocking protrusion 15. One side of the lifting guide 25 is provided with a driving projection (27 '). The driving protrusion 27 ′ is interlocked with the guide groove formed on the lower surface of the tray at the end of the disc loading operation, and when the tray comes to a specific position, the driven rack 27 of the lifting guide 25 is driven by the driving gear 20. It is engaged with and to receive power.

Reference numeral 29 denotes an emergency lever which allows the tray to be taken out to the outside by manually operating the lifting guide 25 in an emergency.

The operation of the disk drive according to the prior art having such a configuration will be described.

First, in Fig. 1, the loading of the disk is completed and the disk seated on the turntable 8 is rotated by the spindle motor 7, and the recording and reproduction of signals are performed by the light irradiated from the pickup 9 on the disk. The state is shown.

At this time, the interlocking protrusion 15 of the elevating base 12 supporting the tip of the pickup base 3 is guided to the elevating cam 28 of the movable guide 25, so that the tip of the pickup base 3 is It is in an elevated state.

In the above state, when the unloading signal of the disk is given, the lifting guide 25 is moved in the direction of arrow A of FIG. 1 while the loading motor 17 is driven. By moving the elevating guide 25, the linkage protrusion 15 is moved to a relatively low portion of the elevating cam 28 to lower the tip of the pickup base (3). Simultaneously with this operation, the tray is moved to the outside of the disc drive by the drive gear 20, thereby unloading the disc. At this time, the engagement of the driven rack 27 and the drive gear 20 is terminated when the lowering of the pickup base (3) is completed.

When the tray is moved back to the loading position, the driving force of the loading motor 17 is transmitted to the drive gear 20 and transferred to the tray through the rack driving gear 22 at the beginning of the loading operation. The tray is moved. When the tray is moved to reach the end of the loading operation, the lifting guide 25 is moved while the driving protrusion 27 'of the lifting guide 25 is guided to the guide groove on the lower surface of the tray. The gear 20 and the driven rack 27 are engaged to transmit the power of the loading motor 17. Therefore, the lifting guide 25 moves in the opposite direction to the arrow A by the driving force of the loading motor 17. By the movement of the elevating guide 25, the linkage protrusion 15 is guided to a relatively high portion of the elevating cam 28 so that the elevating base 12 rotates about the central axis of rotation 13. The tip end of the pickup base 3 is raised.

As a result of the rise of the pickup base 3, the disk mounted on the tray is seated on the turntable 8 of the spindle motor 7 installed in the pickup base 3 and clamped on the turntable 8 (not shown). (Not shown) is fixed to the turntable 8 so that it can be rotated by the turntable 8.

However, the prior art having the above configuration has the following problems.

In general, a disk drive is used while mounted on a computer main body, and the disk drive may be inadvertently applied to the disk drive in a step until the disk drive is mounted on the computer main body. For example, the disk drive may fall.

When the shock is applied to the disk drive as described above, the pickup 9 is more impacted than the main base 1 or the pickup base 3. This is because when the shock is applied to the disc drive, the pickup 9 is moved along the guide shaft 10 and subjected to secondary shock while hitting the mechanical stopper. In this way, if the pickup 9 is damaged by impact, it will not be able to perform its proper performance.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, so that pickup does not move even when an external impact is applied.

1 is a plan view showing the configuration of a disk drive according to the prior art.

Figure 2 is an exploded perspective view showing the configuration of an embodiment of the present invention.

Figure 3 is a perspective view showing a state in which the dummy disk is fixed to the tray seated in the embodiment of the present invention.

Figure 4 is a side cross-sectional view showing a configuration of an embodiment of the present invention.

5 is a bottom perspective view of a dummy disk constituting an embodiment of the present invention.

6 is a use state showing that the movement of the pickup is restricted by the dummy disk of the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

50: main base 60: tray

62: disk seating surface 64: pickup window

70: spindle motor 72: turntable

74: guide cone 75: pickup

77: clamp 80: dummy disk

82: disc body 84: mounting hole

86: seating guide plate 87: regulatory protrusion

88: regulatory surface

According to a feature of the present invention for achieving the object as described above, the present invention is a disk body that is formed in the mounting hole in the center and configured in the shape of an optical disk and a seat on the tray, and the surface corresponding to the pickup of the disk body A protrusion is formed to include a regulating protrusion for regulating the movement of the pickup.

One end of the disk body is further provided with a seating guide plate for setting the installation position of the regulating projection while seated in the pickup window of the tray.

The mounting hole has a diameter larger than the outer diameter of the guide cone of the spindle motor for rotating the disk.

According to another feature of the present invention, the present invention provides a pickup base which is installed on the main base and is provided with a spindle motor for rotating the disk and a pickup for recording and reading signals, and located above the pickup base and located above the main base. A dummy disk having a tray having a disk seating portion which is inserted into and out of the upper surface and seats the disk on the upper surface thereof, and is provided on the disk seating portion, is fixed to one side of the spindle motor, and has a restricting protrusion that regulates the pickup movement on the lower surface of the disk. It is configured to include.

The regulating protrusion is formed on the opposite side of the spindle motor with respect to the pickup in the state where the dummy disk is seated in the disc seating portion to regulate the movement of the pickup.

According to the present invention having such a configuration, it is possible to prevent the pickup from being damaged by an impact caused by the fall of the disk drive or the like.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a dummy disk and a pickup protection device for a disk drive using the same according to the present invention will be described in detail with reference to the accompanying drawings.

2 is an exploded perspective view showing the configuration of an embodiment of the present invention. According to this, the main base 50 forms the skeleton of the disk drive. The tray 60 is installed on the main base 50 so as to be accessible.

The tray 60 loads and unloads the disk into and out of the disk drive while the disk is seated. A disk seating surface 62 on which the disk is seated is formed at the center of the upper surface 61 of the tray 60. do. A plurality of steps are formed so that disks of various sizes of the disk seating surface 62 can be seated. Here, the disk seating surface 62 is formed to be relatively lower than the upper surface 61.

The pickup window 64 is formed long toward the rear end of the tray 60 at the center of the disk seating surface 62. The pickup window 64 is formed to penetrate the tray 60 up and down, so that light can be transmitted between the pickup 75 and the disk, which will be described below. The pickup window 64 is formed to extend a predetermined distance from the center of the disk seating surface 62 to the top surface 61 through the disk seating surface 62.

The side wall 62a formed on the upper surface 61 side portion of the pickup window 64 is thicker than the side wall 62b of the disk seating surface 62 around the spindle motor 70. This is because the thickness difference occurs because the disk seating surface 62 is formed lower than the upper surface 61. A rear wall 62c is formed at the end of the pickup window 64 and is continuous with the left and right sidewalls 62a.

A pickup base is installed on the main base 50 corresponding to the lower side of the tray 60. The pickup base 50 is provided with a spindle motor 70 corresponding to the position of the pickup window 64 corresponding to the center of the disk seating surface 62 of the tray 60. The spindle motor 70 provides a driving force for rotating the disk, the upper end of which is provided with a turntable 72 on which the disk is seated, and a guide cone into which the mounting hole of the disk is fitted in the center of the upper surface of the turntable 72. 74 is provided. The top of the guide cone 74 is formed to be a predetermined slope toward the base.

The pickup base is provided with a pickup 75 to move along the pickup window 64 of the tray 60. The pickup 75 is installed to move along the guide shaft in the pickup base by irradiating light onto the signal recording surface of the disc to record a signal or to read the recorded signal. The pickup 75 is moved by a separate drive source.

Thus, the tip of the pickup base on which the spindle motor 70 and the pickup 75 are installed is raised and lowered according to the loading and unloading operation of the tray 60. This is to prevent the tray 60 and the spindle motor 70 from interfering with each other during the loading and unloading operation of the tray 60.

In addition, above the tray 60, as shown in FIG. 4, a clamp 77 is provided. The clamp 77 is for fixing a disk seated on the turntable 72. It is supported by the upper case (not shown) constituting the upper appearance to be liftable.

On the other hand, when the dummy disk 80 is seated on the disk seating surface 62 of the tray 60, as shown in FIG. 3, and an external impact is applied, the movement of the pickup 75 is regulated.

2 and 5, the dummy disk 80, the disk body 82 is formed in a disc shape having a shape of a general disk. The disc body 82 is sized to be seated on the disc seating surface 62. In the center of the disc body 82 is a mounting through hole 84 is formed through. The mounting hole 84 has a diameter larger than the outer diameter of the guide cone 74. The diameter of the mounting hole 84 is increased so that the mounting hole 84 does not affect the axial squareness of the spindle motor 70 and is set to a size that is fixed by the clamp 77. do.

On one side of the disk body 82, the seating guide plate 86 is extended. The seating guide plate 86 is preferably integrally formed with the disk body 82 and formed at least the same thickness. The seating guide plate 86 is manufactured to a degree that is accurately inserted into the pickup window 64 formed on the upper surface 61 side. Therefore, both side walls 86a and rear walls 86b are formed in the seating guide plate 86 by the thickness thereof. The seating guide plate 86 is seated on a portion of the pickup window 64 formed on the upper surface 61 of the tray 60. Such a mounting guide plate 86 serves to determine the direction in which the dummy disk 80 is seated so that the regulation protrusion 87 to be described below can come to a specific position.

A regulating protrusion 87 is formed at a position corresponding to the mounting hole 84 and the seating guide plate 86 in the lower surface of the disc body 82. The regulating projection 87 protrudes from the lower surface of the disk body 82, and the regulating surface 88 is formed in the direction of the mounting hole 84 so that one end of the pickup 75 is in contact with the regulating projection 87. Here, the height of the regulating protrusion 87 may overlap a predetermined length with one side of the upper end of the pickup 75 at a position where the pickup 75 is raised, and pick up while moving with the tray 60 during loading or unloading. It should be such that it does not interfere with (75) or spindle motor (70).

Hereinafter, the operation of the dummy disk having the configuration as described above and the pickup protection device of the disk drive using the same will be described.

The dummy disk 80 of the present invention is mounted at the time of shipment of the disk drive, and is removed at the time of use of the disk drive. The dummy disk 80 is seated on the disk seating surface 62 of the tray 60 as shown in FIGS. 3 and 4. That is, the disk body 82 is seated on the disk seating surface 62 and the guide cone 74 is positioned in the mounting hole 84. The seating guide plate 86 is positioned at one end of the pickup window 64. Accordingly, the dummy disk 80 may have a disc seating surface 62 of the tray 60 due to a step between the top surface 61 and the disc seating surface 62 only in a state where it is seated on the disc seating surface 62. Does not flow.

In addition, when the tray 60 is in the loading position (the state accommodated inside the disc drive), the tip of the pickup base is raised, so that the turntable 72 is raised toward the clamp 77 so that the turntable 72 is rotated. The clamp 77 is fixed to the turntable 72 by a dummy disk 80 seated thereon.

On the other hand, in this state, the pickup 75 is in the position closest to the spindle motor 70. In order to do this, it is preferable to set the pickup 75 to be in a position close to the spindle motor 70 during loading and unloading.

When the seating guide plate 86 is located in the pickup window 64, both side walls 86a and the rear wall 86b of the seating guide plate 86 are formed on both side walls 62a of the disc seating surface 62 and after. Located at a slight distance from the face wall 62c, the rotation of the dummy disk 80 is prevented by the contact of both side walls 62a and 86a, and the horizontal movement is caused by the contact of both rear walls 62c and 86b. Is stopped by

Therefore, as shown in FIG. 4, the dummy disk 80 is seated and fixed on the turntable 72, and the regulating surface 86 of the regulating protrusion 87 faces one side of the pickup 75. This is located. Therefore, the pickup 75 is located between the turntable 72 and the regulating protrusion 87, as shown in FIG.

In such a state, when an impact is applied from the outside by falling of the disk drive or the like, the pickup 75 tends to move by inertia along the guide shaft.

However, the pickup 75 can not move because the guide shaft is no longer extended in the direction of the turntable 72, and can be moved if there is no structure restricting movement in the direction in which the guide shaft extends.

In this case, as shown in FIG. 6, the regulating protrusion 87 of the dummy disk 80 restricts the pickup 75 from moving away from the turntable 72 along the guide shaft. That is, even if the pickup 75 has a tendency to move in the direction of arrow B of FIG. 4 due to an external impact, one side of the pickup 75 is supported by the regulating surface 88 of the regulating protrusion 87. Movement is regulated. Therefore, the pickup 75 can be prevented from flowing arbitrarily by an external impact.

Here, it will be described that the dummy disk 80 moves in a state seated on the tray 60 and is mounted inside the disk drive. The dummy disk 80 is seated on the disk seating surface 62 with the tray 60 drawn out of the disk drive. At this time, the regulation protrusion 87 of the dummy disk 80 is accurately set in position by the seating guide plate 86 is seated on the pickup window 64 formed on the upper surface 61.

Next, when the loading signal is applied, the tray 60 starts to move into the main base 50. When the tray 60 moves and the mounting hole 84 of the dummy disk 80 comes above the turntable 72, the tip of the pickup base starts to rise.

As the pick-up base rises, the turntable 72 rises, a mounting hole 84 is inserted into the guide cone 74, and a clamp 77 moves the dummy disk 80 to the turntable 72. Will be pressed. By this operation, the dummy disk 80 is located above the disk seating surface 62. At this time, as the turntable 72 is raised, the pickup 75 is also raised to be positioned between the turntable 72 and the regulating protrusion 87 as shown in FIG. 4.

Therefore, even if an external impact is applied to the pickup 75 to move in the direction of the regulating projection 87, the pickup 75 is not caught by the regulating surface 88 of the regulating projection 87, so that the pickup ( 75) secondary shock is prevented.

And it will be described to remove the dummy disk 80 for use of the disk drive. When the signal for unloading the tray 60 is applied, the turntable 72 and the pickup 75 are lowered while the front end of the pickup base is lowered, and the dummy disk 80 seated on the turntable 72 is It is seated on the disk seating surface 62. As a result of the lowering of the pickup base, the fastening state by the clamp 77 is released, and the guide cone 74 exits from the mounting hole 84. At this time, the pickup 75 is also lowered so as not to interfere with the regulation protrusion 87 when the tray 60 is moved.

In the dummy disk according to the present invention and the pick-up protection device of the disk drive using the same, the dummy disk having a regulating protrusion on the bottom thereof is placed on the disk seating surface of the tray and the tray is placed in the loading position. Since the movement is regulated, even if an impact is applied from the outside, the pickup is moved by inertia, thereby preventing the secondary shock.

Claims (5)

A disk body having a mounting hole formed in the center and configured in the shape of an optical disk, The dummy disk, characterized in that it comprises a regulating projection protruding on the surface corresponding to the pickup of the disk body to regulate the movement of the pickup. The dummy disk of claim 1, further comprising a seating guide plate at one end of the disc body, the seating guide plate being configured to set an installation position of the regulation protrusion while seated on a pickup window of the tray. The dummy disk according to claim 1 or 2, wherein the mounting hole has a diameter larger than the outer diameter of the guide cone of the spindle motor for rotating the disk. A pickup base mounted on the main base and provided with a spindle motor for rotating the disk and a pickup for recording and reading signals; A tray located above the pick-up base and drawn in and out along the main base and having a disk seating portion on which a disk is seated; And a dummy disk mounted on the disk seating portion, fixed to one side of the spindle motor, and having a regulating protrusion on the lower surface thereof to regulate the movement of the pickup. 4. The pickup protection of claim 3, wherein the regulating protrusion is formed on the opposite side of the spindle motor with respect to the pickup in a state where the dummy disk is seated in the disk seating portion to restrict movement of the pickup. Device.