KR100907431B1 - Optical disk drive - Google Patents

Abstract

An optical disk drive is provided to absorb vibration as a buffer part supports the sagging of a main base in case an optical disk drive is perpendicularly set up and uses. An optical disk drive comprises: a mainframe in which a tray mounting an optical disc is inserted and drawn; a sub chassis being installed at the mainframe to be vertically rotated; a spindle motor rotating an optical disc with being supported in the sub chassis and the mainframe; a main base in which an optical pick-up which records the information in the optical disc or reproduces the information; and a plurality of dampers(150) being formed at a connected part between the sub-chassis, the mainframe and the main base and preventing the main base from crashing to the sub-chassis and the mainframe when the mainframe is installed in the vertical direction. The damper comprises: a first cap member(152) forming a first bonding groove; a second cab member(153) forming a second bonding groove; and a buffer unit(156) having the thickness with being extended toward the second cab member.

Description

Optical Disk Drive {Optical Disk Drive}

The present invention relates to an optical disk drive, and more particularly, to an optical disk drive having a damper capable of preventing contact between the main base and the subchassis even when the optical disk drive is mounted vertically.

In general, an optical disc drive refers to a device for recording or reading information by irradiating light onto a disc-shaped optical medium (hereinafter referred to as an optical disc) such as a CD (Compact Disc) or a DVD (Digital Video Disc).

The optical disk drive generates a large amount of internal vibration due to the high speed rotation of the optical disk, and installs a damper made of a viscoelastic material to reduce vibration and dampen the shock.

The optical disc drive includes a main base provided with a spindle motor for mounting and rotating an optical disc, and a sub chassis connected to the main base to move the main base in the vertical direction. A plurality of dampers are provided between the main base and the sub chassis. It is installed. The damper prevents vibration generated by the high speed rotation of the spindle motor from being transmitted to the subs Chassis, and prevents externally generated vibrations and shocks from being transmitted to the main base.

In the case where the optical disc drive is mounted on the main body, the damper is sag due to the load. In particular, when the deflection in the vertical direction is large and the clearance decreases, vibration and noise occur due to the collision between the optical disk and the internal structure of the drive or the contact phenomenon between the main base and the sub chassis. In order to prevent this, a separate vertical damper is made or the rigidity of the damper is strongly designed so that there is little deformation of the damper so that no contact occurs.

As described above, in the case of supporting the load of the main base by using the deformation of the damper, the deformation of the damper is smaller as the hardness thereof is larger, and becomes larger as the hardness thereof is smaller. Therefore, in order to prevent the main base and the sub chassis from contacting each other, it is necessary to limit the hardness of the damper to a predetermined level or more. In the case of the conventional optical disk drive, the hardness of the damper is set to 30 degrees to cope with the vertical sag.

Limiting the hardness of the damper can no longer reduce the resonant frequency of the main base, making it difficult to improve the vibration prevention of vibrations transmitted to the outside, and also reduce the ability to respond to external vibrations transmitted from the outside. There is

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and when the optical disc drive is installed in the vertical direction, the main base is supported in the vertical direction and provided with a shock absorbing portion that can be dustproof while preventing the main base from contacting the subchassis and the mainframe. It is an object to provide an optical disc drive having a damper.

In order to achieve the above object, the present invention provides an optical disk drive comprising: a main frame into which a tray on which an optical disk is mounted;

A sub-chassis rotatably installed in the main frame in a vertical direction;

A main base supported by the sub chassis and the main frame, the spindle motor rotating the optical disk, and an optical pickup configured to record or reproduce information on the optical disk;

A plurality of sub-chassis and the mainframe and the main base is provided in the connection portion, when the mainframe is installed in a vertical direction to support the vertical deflection of the main base to prevent a plurality of bumps and the main chassis And a damper.

According to the invention, the damper is

Body Part,

A first cap member provided at one side of the body and forming a first coupling groove into which the main base is fitted between the body;

A second cap member provided on the other side of the body and forming a second coupling groove into which the sub chassis or the main frame is fitted between the body;

It is provided on one side of the first cap member, protrudes toward the second cap member and has a buffer having a thickness.

According to the present invention, it is further provided with a rotation preventing jaw installed in the first coupling groove so as to face the buffer portion, to prevent the damper from rotating arbitrarily with respect to the main base.

According to the present invention, the anti-rotation jaw protrudes toward the buffer part.

According to the present invention, when the main frame is installed vertically, the buffer portion is located below the main base.

As described above, the optical disk drive according to the present invention

First, in the case where the optical disk drive is installed vertically and used, the shock absorbing part can support the vertical deflection of the main base to absorb vibration.

Second, the hardness of the damper can be designed low, there is an effect that can improve the vibration damping function of the damper.

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

FIG. 1 is an exploded perspective view showing a schematic configuration of an optical disk drive, FIG. 2 is a view illustrating a main base, a subchassis, and a damper when the optical disk drive is vertically installed, and FIG. 3A is a perspective view of the damper. 3B is a side view of the damper, and FIG. 4 is a diagram illustrating a coupling relationship between the main base, the sub chassis, and the damper.

Referring to FIG. 1, the optical disc drive 100 includes a main frame 110, a tray 120 that mounts an optical disc D and enters and exits the main frame 110, and the main frame 110. It is provided with an upper case (not shown) provided on the upper side and having a clamper (not shown) for fixing the optical disk (D) to the turntable.

The tray 110 includes a first seating surface 121 on which an optical disk of 120 mm in diameter is seated and a second seating surface 122 on which an optical disk of 80 mm in diameter is mounted.

The main chassis 110 is provided with a sub chassis 130 to be rotatable in the vertical direction. The subchassis 130 is supported on the main frame 110 by using the rotation shaft 132, and a plurality of cam protrusions 131 are connected to the sliding member 111 installed on the main frame 110. have. When the sliding member 111 is slid by the drive device 112 in the direction perpendicular to the direction in which the tray 120 enters and exits the main frame 110 (Y direction), the subchassis 130 is rotated. It rotates in the up-down direction (Z direction) about the coaxial 132. As shown in FIG.

The subchassis 130 supports one side of the main base 140. The main base 140 records information on the optical disk D while sliding in the radial direction of the turntable 141 on which the optical disk D is mounted and the optical disk D mounted on the turntable 141. Or an optical pickup 142 for reproducing the recorded information or reproducing the recorded information. Although not shown in the drawings, a spindle motor (not shown) for rotating the turntable 141 is installed coaxially with the turntable 141.

One side of the main base 140 is supported by the sub chassis 130, and the other side of the main base 140 is supported by the main frame 110. Therefore, when the subchassis 130 is rotated in the up and down direction, one side of the main base 140 also moves in the up and down direction together with the subchassis 130, so that the turntable 141 is the optical disk D. Can be accessed or spaced apart.

A damper 150 is installed at a portion where the main base 140 is connected to the sub chassis 130 and the main frame 110. The damper 150 prevents vibration generated by the high speed rotation of the spindle motor (not shown) installed in the main base 140 from being transmitted to the subchassis 130 and the main frame 110, and vice versa. It prevents the vibration and shock generated from the outside to be transmitted to the main base 140, thereby preventing the malfunction of the optical pickup 142.

2 to 4, the damper 150 is provided on one side of the body 151 having a predetermined thickness and the body 151, and the main base 140 between the body 151. The first cap member 152 and the other side of the body 151 to form a first coupling groove 154 formed to be recessed so as to be fitted in the sub-chassis between the body 151 The second cap member 153 and the second cap member 153 forming the second coupling groove 155 formed to be recessed so that the main frame 110 or the main frame 110 is fitted, and provided on one side of the first cap member 152. Protruding toward the second cap member 153 extends a predetermined length, and has a buffer portion 156 having a rectangular shape having a predetermined thickness.

The shock absorbing part 156 supports the main base 140 in the vertical direction (Z direction) when a large impact is applied from the outside to severely deform the body 151 of the damper 150. 130 or to prevent the main frame 110 from hitting, preferably formed integrally with the first cap member 152.

Since the buffer part 156 supports the vertical sag of the main base 140, the hardness of the damper 150 may be lower than that of the conventional one. That is, the conventional damper had to form a high hardness in order to support the vertical deflection of the main base, but when the hardness is high, there is a problem in that the damping force of the damper is weakened and the dustproof function is reduced. Since the vertical sag of the base 140 is supported, it is not necessary to form the hardness of the damper unnecessarily high. Therefore, the damper may absorb vibration with a hardness that may have an appropriate elastic force, and may support the vertical sag of the main base 140 by using the buffer part 156. At this time, the vertical sag of the main base 140 may be adjusted by adjusting the thickness of the buffer part 156.

The length of the shock absorbing portion 156 is preferably provided so as not to be inconvenient to fit the main base 140 into the first coupling groove 154, it is preferable to extend to the body 151. The shape of the buffer portion 156 is preferably in the shape of a rectangle, but various modifications such as a triangle shape and a polygonal shape may be applied.

The damper 150 is arbitrarily rotated in the first coupling groove 154 to the main base 140 is projected to a predetermined height toward the buffer portion 156 to be fitted to the first coupling groove 154. The anti-rotation jaw 157 is provided to prevent. The main base 140 is preferably formed with a groove (not shown) so that the rotation preventing jaw 157 is inserted and fixed.

Therefore, the damper 150 may be limited to the portion installed in the main base 140 by the anti-rotation jaw 157, the buffer unit 156 supports the main base 140 in the vertical direction. The damper 150 is preferably installed so that it can be placed in a position where it can be. As shown in FIGS. 2 and 4, the damper 150 is installed at the main base 140 so that the buffer part 156 is positioned below the main base 140 in the vertical direction (Z direction). It is desirable to be.

5 is a graph illustrating a comparison of the frequency transfer function of a conventional damper and a damper having a buffer, and FIG. 6 is a graph illustrating an internal response size of a conventional damper and a damper having a shock absorber with respect to an applied shock amount. to be.

Referring to Fig. 5, the solid line T denotes the damper of the present invention including the buffer portion, and the dashed line P denotes the conventional damper.

The damper of the present invention having a buffer part has a low resonance frequency because the hardness is about 10 degrees lower than that of the conventional damper, and the vibration and vibration damping performance at 140 kHz or more, which is the main operating area of the optical disk drive, is higher than that of the conventional damper. It can be seen that excellent.

Referring to Figure 6, as a result of the impact test by applying an impact amount of 11msec 8G, it can be seen that the damper according to the present invention having a buffer portion is 16G, while the conventional damper has a magnitude of the impact amount 40G. This is improved so that the shock absorbing portion 156 absorbs the shock to reduce the size of the impact by about 60%.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary and will be understood by those of ordinary skill 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.

1 is an exploded perspective view showing a schematic configuration of an optical disk drive;

2 is a diagram illustrating a main base, a subchassis, and a damper when the optical disk drive is installed vertically;

3A is a perspective view of a damper,

3b is a side view of the damper,

4 is a view illustrating a coupling relationship between a main base, a sub chassis, and a damper;

5 is a graph showing a comparison of the frequency transfer function of a damper having a conventional damper and a damper;

6 is a graph showing a comparison of the internal response size of a conventional damper and a damper having a shock absorber with respect to the applied impact amount.

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

100 Optical disc drive 110 Mainframe

111 ... Sliding member 112 ... Driver

120 ... Tray 130 ... Sub-Chassis

131 ... camera 132 ... coaxial

140 ... Main Base 141 ... Turntable

142 Optical pickup 150 Damper

151 Body 152 First cap member

153 second cap member 154 first coupling groove

155 ... 2nd engagement groove 156 ... buffer

157.Rotary bump

Claims (5)

A main frame to which the tray on which the optical disk is mounted is inserted and exited; A sub-chassis rotatably installed in the main frame in a vertical direction; A main base supported by the sub chassis and the main frame, the spindle motor rotating the optical disk, and an optical pickup configured to record or reproduce information on the optical disk; A plurality of sub-chassis and the mainframe and the main base is provided in the connection portion, when the mainframe is installed in a vertical direction to support the vertical deflection of the main base to prevent a plurality of bumps and the main chassis A damper; The damper includes a body; A first cap member provided at one side of the body and forming a first coupling groove into which the main base is fitted between the body; A second cap member provided on the other side of the body and forming a second coupling groove into which the sub chassis or the main frame is fitted between the body; And a buffer part provided at one side of the first cap member and protruding toward the second cap member and having a thickness. delete The method of claim 1, And an anti-rotation jaw installed in the first coupling groove so as to face the buffer part and preventing the damper from being arbitrarily rotated with respect to the main base. The method of claim 3, wherein The anti-rotation jaw protrudes toward the buffer part. The method of claim 1, And the buffer part is located below the main base when the main frame is installed vertically.

Images