KR100505653B1 - Slim type optic disc drive - Google Patents

Abstract

The disclosed slim optical disc drive includes a spindle motor for rotating an optical disc, a tray on which an optical pickup for accessing the optical disc is mounted, and a lower case having a through portion formed under the tray, and a main board for controlling the operation of the optical disc drive. , An FPC unit for electrically connecting the main parts board and the electrical components installed in the tray, wherein the FPC unit is attached to the lower case to block the penetration part.

By such a configuration, the upper and lower spaces can be further secured by the difference between the thickness of the lower case and the thickness of the cover part, contributing to the slimming of the slim optical disk drive.

Description

Slim type optical disc drive

The present invention relates to a slim optical disk drive.

In general, an optical disc drive is a device for recording information on or reading information from a recording surface consisting of concentric tracks on an optical disk such as a compact disc (CD) or a digital video disc (DVD). On the other hand, information is recorded or read by radiating a beam from the optical pickup sliding in the radial direction of the optical disc. In particular, slim optical disc drives are made very thin for use in notebooks and the like.

1 illustrates a conventional slim optical disk drive.

Referring to Figure 1, the tray 20 is installed in the lower case 10 to be slidable. The tray 20 includes a spindle motor 30 for rotating the optical disc D, and an optical pickup 50 for accessing or reading information by accessing the optical disc D while sliding in the radial direction of the rotating optical disc D. Is installed. The lower case 10 is provided with a main control board 60 for controlling the operation of the optical disk drive, the optical pickup 50 and the spindle motor 30 installed in the tray 20 by the FPC (flexible printed circuit) 70 Connected with The FPC 70 is flexibly folded or unfolded in the space between the tray 20 and the lower case 10 as the tray 20 slides. For this purpose, a part of the FPC 70 is bonded to the lower case 10 as shown by the hatched portion of FIG. 1.

In the case of a slim optical disk drive, the tray 20 slides at a very narrow distance from the lower case 10 in order to reduce the thickness of the product. Therefore, the thickness of the optical pickup 50 mounted on the tray 20, the motor 40 for sliding the optical pickup 50, and the spindle motor 30 are important factors for determining the thickness of the optical disk drive. . If the components are thick, the entire thickness of the optical disc drive may be increased to maintain the vertical gap between the tray 20 and the lower case 10.

However, when the CD-ROM (read-only-memory) playback function is used as well as the recording / playback function of the CD-RW (read-write) or the DVD playback function, the optical pickup 50 becomes thick and large. In addition, there may be a case where a thick component is inevitably used due to component supply and demand. In this case, in order not to change the thickness of the entire optical disk drive, the upper and lower spaces between the tray 20 and the lower case 10 are utilized. To this end, the space in which the components are installed in the tray 20 may slightly protrude downward.

However, since the space between the tray 20 and the lower case 10 is very narrow as described above, the protruding portion and the lower case 10 may interfere when the tray 20 is slid. The simplest way to avoid this interference is to increase the vertical gap between the lower case 10 and the tray 20, there is a problem that the thickness of the optical disk drive is thick.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a slim optical disk drive that can be improved to make maximum use of a given space for slimming a product.

In the slim optical disk drive of the present invention for achieving the above object, a spindle motor for rotating an optical disk and a tray mounted with an optical pickup to access the optical disk is slidably installed, and a lower case having a through portion formed under the tray. ; A main control board installed in the lower case and controlling the operation of the optical disk drive; And an FPC unit for electrically connecting the main parts board and the electrical components installed in the tray, wherein the FPC unit is partially attached to the lower case to block the through part.

The FPC unit may include a cover part formed along the shape of the through part; And a cable part formed on the cover part to connect the main board and the electrical parts on the tray, the cable part including a first connection part connected to the main board and a second extension part connected to the tray.

In addition, the FPC unit may be formed by adhering the cover portion and the cable portion.

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

2 shows an embodiment of a slim optical disk drive according to the present invention.

2, the tray 120 is installed in the lower case 110 so as to slide in the direction of the arrow A in the drawing. The tray 120 is provided with a spindle motor 130, an optical pickup 150, and a driving motor 140. The spindle motor 130 rotates the optical disc D, and a turntable 131 is provided on the rotating shaft. The optical disc D is mounted on the turntable 131. The optical pickup 150 slides in the radial direction of the optical disc D to access the recording surface of the optical disc D to record or reproduce information. The driving motor 140 slides the optical pickup 150.

The main case board 160 is installed in the lower case 110. The main board 160 controls the operation of the optical disk drive as a whole. The main board 160 includes an optical pickup 150, a spindle motor 130, and a driving motor 140 through a flexible printed circuit (FPC) unit 200. Electrically connected to the electrical components installed in the 120). Reference numeral 190 denotes an upper case.

The penetrating part 180 is formed in the lower case 110. The through part 180 is to avoid interference with the lower surface of the tray 120, and the optical pickup 150 mounted on the tray 120 slides in the radial direction of the optical disc D mounted on the spindle motor 130. It is formed to accommodate the space. Recently, the size and thickness of the optical pickup 150 increases as the functions of the slim optical disk drive are diversified. In order to accommodate this, the portion of the tray 120 shown in dotted lines in FIG. It protrudes slightly toward 110. The tray 120 slides while maintaining a narrow gap with the lower case 110. Therefore, as described above, when the tray 120 slightly protrudes downward, the vertical gap between the lower case 110 and the tray 120 is reduced, and thus may interfere with each other when the tray 120 is slid. The through part 180 is to avoid this interference, and is formed through the lower case 110 so that the upper and lower spaces of the maximum lower case 110 can be further secured without increasing the thickness of the slim optical disk drive. have.

Although the sliding space of the tray 120 can be secured by forming the through part 180 as described above, it is not preferable to expose the internal space of the slim optical disc drive to the outside through the through part 180 in terms of product quality. . Therefore, the FPC unit 200 of the present invention is manufactured to serve as a cover for blocking the through part 180. Referring to FIG. 2, the FPC unit 200 includes a cover part 210 formed along the shape of the through part 180 so as to block the through part 180, and a main board as laminated on the cover part 210. The cable unit includes a first connector 220 connected to the 160 and a second connector 230 connected to the tray 120.

The cover part 210 is slightly larger than the through part 180. The cover 210 is attached to the lower surface of the lower case 110 using an adhesive such as a double-sided tape. In order not to increase the thickness of the slim optical disk drive, the edge 181 of the through part 180 may be formed to be stepped on the upper side of at least the thickness of the cover part 210. The thickness of the cover 210 is preferably thinner than the flesh thickness of the lower case 110. In this case, when the cover unit 210 is coupled to the lower case 110, the lower surface of the cover unit 210 is hibernated with the lower surface of the lower case 110 or slightly immersed in the upper side.

The first connection portion 220 is a portion connected to the main control board 160, is formed on the upper surface of the cover portion 210, the length is preferably formed to extend slightly further from the edge of the cover portion 210. The second connector 230 is separated from the upper surface of the cover part 210 because the second connector 230 must be flexibly bent when the tray 120 is slid. The first extension part 220 and the second extension part 230 are electrically connected to each other, and have an overall U shape.

3 is a cross-sectional view showing a cross-sectional structure of the FPC unit 200. Referring to FIG. 3, for example, the first adhesive layer A1, the base film B1, the second adhesive layer A2, the copper foil C, and the third surface may be formed on the upper surface of the cover portion 210 formed of a plastic film. The FPC unit 200 is formed by sequentially laminating the adhesive layer A3 and the base film B2. The copper foil C forms an energization path through which electricity flows and imparts some rigidity to the FPC 200. Since the second connector 230 must be bent separately from the upper surface of the cover 210 as described above, when the first adhesive layer A1 is stacked on the cover 210, the second connector 230 is formed. The formed portion is masked so that no adhesive is applied. When the FPC unit 200 is formed in this manner, the base film B1 and the cover portion 210 forming the second connection portion 230 are separated, and the first connection portion (as shown by the hatched portion of FIG. 2). From 220 to the portion bent toward the second connecting portion 230 is bonded to the cover portion 210.

4 is a cross-sectional view taken along line II ′ of FIG. 2.

Referring to FIG. 4, the first connector 220 is connected to the connector 161 provided on the main board 160, and the second connector 230 is connected to the tray 120. The tray 120 has a second PCB (not shown) connected to electrical components including the spindle motor 130, the driving motor 140, and the optical pickup 150, so that the second connector 230 may be connected thereto. . In addition, electrical components including the optical pickup 150 and the driving motor 140 are connected to a third PCB (not shown) connected to the spindle motor 130, and a second connection unit 230 may be connected to the third PCB. .

In the loading state in which the tray 120 is fully inserted into the lower case 110, the second connection portion 230 is disposed between the tray 120 and the lower case 110 as indicated by the state D of FIG. 4. Only the side close to 120 is bent, and the rest is almost straightened. However, when the tray 120 is unloaded, the bent position continuously changes in the sliding direction of the tray 120 as the tray 120 slides out, and when the tray 120 is completely unloaded, E of FIG. Will be as shown.

The cover part 210 prevents the inside of the slim optical disc drive from being exposed to the outside through the through part 180 by blocking the through part 180. In addition, the space between the lower surface of the tray 120 and the upper surface of the cover portion 210 has a thickness T1 and the cover portion 210 of the lower case 110 compared to the conventional slim optical disk drive shown in FIG. 1. There is more margin by the difference in the thickness T2. Therefore, there is room to reduce the product thickness by this difference. On the other side, even if the thickness of the components mounted on the tray 120 becomes thick by this difference, it can accommodate without increasing the thickness of the whole product.

In the above-described embodiment, a case in which the cable part is laminated on the cover part 210 has been described, but the scope of the present invention is not limited thereto. For example, the cover part 210 and the cable part may be separately manufactured, and the cable part may be attached to the cover part 210. At this time, the first connection portion 220 is bonded to the cover portion 210 except for a portion of the tip portion of the first connection portion 220 to the point bent in a U-shape. Then, an FPC unit capable of performing the same function as in the above embodiment can be obtained.

As described above, according to the slim optical disk drive according to the present invention, the following effects can be obtained.

First, by blocking the penetrating part using the FPC unit, the inside of the slim optical disc drive is prevented from being exposed to the outside through the penetrating part, thereby contributing to the improvement of product quality and electrically connecting the tray and the main board.

Second, by penetrating the lower case and blocking it with the cover part integrally formed in the FPC unit, the upper and lower spaces can be further secured by the difference between the thickness of the lower case and the thickness of the cover part, contributing to the slimming of the slim optical disk drive.

Third, since the FPC does not need to be separately adhered as in the conventional slim optical disk drive, the process shortening effect can be achieved during manufacturing.

It is to be understood that the invention is not limited to that described above and illustrated in the drawings, and that more modifications and variations are possible within the scope of the following claims.

1 is a perspective view showing a conventional slim optical disk drive.

Figure 2 is an exploded perspective view showing an embodiment of a slim optical disk drive according to the present invention.

3 is a cross-sectional view showing a cross-sectional structure of the FPC unit.

4 is a cross-sectional view taken along line II ′ of FIG. 2.

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

110 ...... Lower case 120 ...... Tray

130 ...... spindle motor 140 ...... drive motor

150 ...... optical pickup 160 ...... Main control board

180 ... through 200 ...... FPC unit

210 ... cover part 220 ... first connection part

230 ...... Second connection

Claims (3)

delete A lower case having a spindle motor for rotating the optical disk and a tray on which the optical pickup to be accessed to the optical disk is mounted, the lower case having a through portion formed under the tray; A main control board installed in the lower case and controlling the operation of the optical disk drive; And an FPC unit for electrically connecting the main parts board and the electric parts installed in the tray, the part of which is attached to the lower case to block the through part. The FPC unit, A cover part formed along the shape of the through part; And a cable part formed on the cover part to connect the main board and the electrical components on the tray, the cable part having a first connection part connected to the main control board and a second extension part connected to the tray. Slim optical disc drive. A lower case having a spindle motor for rotating the optical disk and a tray on which the optical pickup to be accessed to the optical disk is mounted, the lower case having a through portion formed under the tray; A main control board installed in the lower case and controlling the operation of the optical disk drive; And an FPC unit for electrically connecting the main parts board and the electric parts installed in the tray, the part of which is attached to the lower case to block the through part. The FPC unit, A cover part formed along the shape of the through part; And a cable part attached to the cover part to connect the main board and the electrical parts on the tray, the cable part having a first connection part connected to the main control board and a second extension part connected to the tray. Slim optical disc drive.