JP2011165237A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device that improves reliability of an interface connector. <P>SOLUTION: The optical disk device includes a rectangular case, a tray on which an optical disk is mounted and which is housed in the case, a control module controlling reading and writing of data of the optical disk, and a substrate provided with a first connector which is fixed to a cylindrical bush provided in the vicinity of a corner of the case and functions as an interface with an external part. The bush has a small-diameter part whose diameter of a part in contact with the substrate is smaller than the outside diameter of the bush, and fixes the substrate to the case while a hole formed in the substrate and the smaller diameter part are fitted with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus, and more particularly to an optical disc apparatus with improved interface connector reliability.

  2. Description of the Related Art Optical disc devices that can read and write optical discs such as compact discs, DVDs, and BDs are widely used mainly in personal computers.

  In recent years, mobile devices such as notebook personal computers have been made thinner and lighter, and an optical disk device mounted thereon has been required to be thin. For example, optical disk devices mounted on notebook personal computers with a thickness of 12.7 mm or 9.5 mm are often used. In addition, the interface connector tends to be downsized and the pitch between terminals tends to be reduced.

  Such a miniaturized interface connector is required to have high positioning accuracy in order to prevent occurrence of a failure during insertion and removal.

  Conventionally, as a method for fixing such an interface connector board, the bottom cover is squeezed from the lower surface to form a pedestal shape, and a burring is protruded toward the board side in the center, fitted with a positioning hole of the board, and burring is performed from the board with screws. 2. Description of the Related Art A disk device is known that can be screwed to obtain accurate substrate positioning accuracy with a simple structure (see Patent Document 1).

JP 2003-338170 A

  According to the above-described prior art, the positioning accuracy can be increased by processing the pedestal provided with the burring on the case side.

  By the way, various functional parts are provided in the optical disc apparatus. For example, as a movable part, a module for rotating an optical disk, a module for taking in and out a tray, a pickup module for irradiating a laser beam on the optical disk, and the like are provided. Further, as electronic components, a unit for controlling each of these modules, a unit for compressing / decoding data on an optical disc and generating a predetermined data string, a unit for interfacing with a computer, and the like are provided. Each of these units is mounted on a substrate, and this substrate is fixed to the case.

  On the other hand, in order to reduce the size and thickness of the optical disc apparatus, there is a type in which the substrate is installed on the tray side instead of the case. In this case, only the board having the interface connector with the computer is fixed to the case side. Since the interface connector is small, the board is also small.

  In addition, the board is provided near the corner of the case in order to define the interface position. For this reason, it is difficult to form a pedestal near the corner of the case by drawing as in the prior art described above, and it is difficult to increase the positional accuracy.

  Further, a board on which only the interface connector is mounted has a small board area, cannot be provided with many screw holes, and the interval between them is also small. For this reason, it is impossible to increase the number of screwing points or increase the space between the screw holes as in the conventional substrate having a relatively large area, and the positioning accuracy cannot be increased.

  The present invention has been made in view of such problems, and in a small and thin optical disc apparatus, the positioning accuracy between the board and the case having the interface connector with the computer is improved, and the reliability of connector insertion and removal is improved. An object of the present invention is to provide an optical disk device that can be enhanced.

  A typical example of the present invention is as follows. That is, an optical disk device for reading and writing data recorded on a mounted optical disk, a rectangular case, a tray in which the optical disk is mounted and housed in the case, a control module for controlling reading and writing of data on the optical disk, A board having a first connector fixed to a cylindrical bush provided near the corner of the case and serving as an interface with the outside, wherein the bush has a diameter in contact with the board that is larger than the outer diameter of the bush A small-diameter portion is provided, and the substrate is fixed to the case in a state in which the hole formed in the substrate and the small-diameter portion are fitted.

  According to one embodiment of the present invention, the positioning accuracy of the substrate can be increased.

1 is a perspective view of an optical disc apparatus according to an embodiment of the present invention. It is a top view of the case of the optical disk device of the embodiment of the present invention. It is a perspective view centering on the connector board | substrate of embodiment of this invention. It is sectional drawing of bush vicinity of embodiment of this invention.

  Hereinafter, an optical disk device 10 according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of an optical disc apparatus 10 according to an embodiment of the present invention. 1A shows a perspective view from the top surface of the optical disk device 10, and FIG. 1B shows a perspective view from the bottom surface of the optical disk device 10. As shown in FIG.

  The optical disc apparatus 1 is composed of a case 11 and a tray 21 stored in the case 11.

  The case 11 has a rectangular dish-shaped portion that is open on the upper surface side and the front surface side, and includes a trapezoidal wing portion 111 on the right side toward the upper surface. The main mechanism portion of the optical disk apparatus 10 is configured to fit in a rectangular area smaller than the diameter (about 12 cm) of the optical disk, and the optical disk is stored in a state protruding from the wing portion 111.

  Since the wing portion 111 can be configured to be thinner than the rectangular portion, it contributes to a reduction in the thickness of the optical disc apparatus 10.

  A connector substrate 12 is fixed to the case 11. In addition, the case 11 is provided with a movable tray 21 for holding the optical disk.

  The tray 21 is configured to be slidable on the front surface side of the case, and is configured to be able to project and store with respect to the case 11. An optical disk is mounted on the upper surface of the tray 21, and a control module (a tray-side substrate 22, a drive device 23, and a pickup device 24) that reads and writes the optical disk is provided on the bottom surface of the tray 21.

  The drive device 23 rotates the optical disk mounted on the tray 21. The pickup device 24 irradiates the optical disc with laser light, and reproduces data recorded on the optical disc by the reflected light.

  A control circuit 25 that controls the driving device 23 and the pickup device 24 is mounted on the tray-side substrate 22. Further, the tray side board 22 is provided with an FPC connector 26 for connecting an FPC (flexible board) cable 120 (wiring member) for electrically transmitting and receiving signals by electrically connecting the control circuit 25 and the connector board 12. ing.

  On the connector board 12, an interface connector 121 (first connector) serving as an interface for communication with the outside of the optical disc apparatus 10 and an FPC connector 122 (second connector) for connecting the FPC cable 120 are mounted. . The FPC cable 120 is made of a flexible material, and its shape changes with the movement of the tray 21 while maintaining signal conduction.

  Next, details of the connector substrate 12 will be described.

  FIG. 2 is a top view of the case 11 of the present embodiment.

  As described above, the connector board 12 is provided near the corner of the case 11, that is, in the upper left corner in FIG.

  In the optical disk apparatus 10 of the present embodiment, main functional components are installed on the bottom surface side of the tray 21 as shown in FIG. As a result, only the connector board 12 is directly fixed to the case side, and the case 11 can be made thick enough to accommodate the tray 21, so that the optical disk device 10 can be made thinner.

  Since only the interface connector 121 and the FPC connector 122 are mounted, the connector substrate 12 may be large enough to mount these. Further, when the tray 21 moves and moves backward, it is necessary to set the size so as not to come into contact with the tray 21.

  In other words, the connector substrate 12 is sized so that the interface connector 121 and the FPC connector 122 can be mounted and minimum screw holes (two places) for fixing to the case can be formed. For this reason, the connector board 12 of this embodiment has a smaller number of screw holes and a shorter screw hole distance than the conventional one.

  Here, the standard of the interface connector 121 for connection to the computer side uses micro SATA (Serial Advanced Technology Attachment). The inter-terminal pitch in this micro SATA connector is defined as 1.27 mm. Moreover, it is possible to employ a connector with a smaller pitch between terminals as the optical disk device 10 becomes thinner.

  Thus, when the interface connector 121 having a small inter-terminal pitch is fixed to the case, the positional accuracy of the interface connector 121 becomes a problem. That is, when a deviation occurs in the fixed position of the interface connector 121, the connector may be damaged or a signal may be defective due to a failure such as an unnecessarily high resistance in inserting and removing the connector.

  In order to improve the positional accuracy of such a connector, a device in which the shape of a pedestal provided in the case 11 is devised for fixing a screw has been known. For example, the case 11 is subjected to burring on a base that is squeezed from the bottom side to the substrate side by pressing or the like, and the outer periphery of the burring and the positioning hole provided on the substrate side are fitted and screwed. There is.

  However, it is difficult to perform such pressing near the corner of the case 11, and the cost increases to increase accuracy.

  Further, when the area of the board is large, the positioning accuracy of the connector board 12 can be maintained by increasing the number of screwing points to three or more, or by increasing the interval between the screwing points. Since No. 12 has a small area, there are two screwing points, and the distance is short, so that the conventional mounting method cannot maintain the accuracy.

  Therefore, the optical disk apparatus 10 according to the present embodiment is configured such that the positioning accuracy of the connector substrate 12 can be increased without increasing the cost by the characteristic configuration described below.

  FIG. 3 is an enlarged perspective view of a portion around the connector board 12 of the present embodiment.

  The connector board 12 is mounted with the interface connector 121 and the FPC connector 122 as described above. Furthermore, holes 123 and 124 for fixing to the case 11 are formed in the connector substrate 12.

  Screws 211 and 212 pass through the holes 123 and 124, respectively, and the connector substrate 12 is screwed to the case 11 side.

  In the case 11, a bush 220 for attaching the connector substrate 12 is fixed, and a base 221 is formed.

  The bush 220 has a cylindrical shape and is fixed near the corner of the case 11. The bush 220 is formed by pressing or cutting a metal material in advance and is caulked at a predetermined position of the case 11. The pedestal 221 is formed so that the case 11 protrudes inward (connector substrate 12 side) by pressing or the like.

  4 is a cross-sectional view of the optical disk apparatus according to the present embodiment taken along the line AA in FIG.

  The bush 220 is fixed by caulking near the corner of the case 11.

  The upper end side of the bush includes a small-diameter portion 220 </ b> A that has a diameter smaller than the outer shape of the bush 220. The small-diameter portion 220A is processed into a diameter that is substantially the same as or slightly smaller than the diameter of the hole 123 so as to be fitted into the hole 123 formed in the connector substrate 12.

  The bush 220 is internally threaded so that the screws 211 are screwed together.

  An interface connector 121 is mounted on the connector board 12. Fixing fittings 126 are extended at both ends of the interface connector 121. The fixing metal 126 is fastened together with the connector board 12 by screws 211 to fix the interface connector 121 to the connector board 12. Further, the looseness of the screw 211 is suppressed by the friction between the fixing fitting 126 and the screw 211.

  The pedestal 221 which is the other fixing portion of the connector board 12 is protruded to the inside of the case 11 and processed with a female ring after processing such as burring substantially the same as or slightly smaller than the hole 124 system. The screw 211 is configured to be screwed.

  As with the hole 123, the interface connector 121 has a fixing bracket 127 extending on the hole 124 side. The fixing metal 127 is fastened together with the connector board 12 by screws 212, thereby fixing the interface connector 121 to the connector board 12 and suppressing loosening of the screws 212 due to friction between the fixing metal 127 and the screws 212. .

  With such a structure, the connector substrate 12 is fixed to the case 11. At this time, the hole 123 and the small-diameter portion 220 </ b> A on the upper portion of the bush 220 are fitted, so that the connector substrate 12 is positioned with high accuracy.

  In particular, since the bush 220 can accurately determine the shape and the caulking position of the case 11 by machining, the connector board 12 can be obtained by fitting the small diameter portion 220A of the bush 220 and the hole 123 of the connector board 12. Are accurately positioned in the horizontal direction. Further, since the connector substrate 12 is supported by the step portion between the bush 220 and the small diameter portion 220A, the connector substrate 12 is accurately positioned in the height direction by accurately forming the height of the step portion.

  For this reason, even when the positioning accuracy of the other (hole 124 and base 221) of the connector substrate 12 is slightly low, the positioning accuracy of the entire connector substrate 12 can be increased.

  The optical disc apparatus 10 according to the embodiment of the present invention configured as described above includes main control modules (a tray-side substrate 22, a drive device 23, and a pickup device 24) in the tray 21, and serves as an interface with the computer side. Only the connector 121 was provided on the connector substrate 12. With such a configuration, the optical disk device 10 can be reduced in thickness and weight.

  Further, since the connector substrate 12 includes only the interface connector 121 and the FPC connector 122, it is possible to reduce the components directly fixed to the case 11, and to reduce the size and thickness of the optical disc apparatus 10.

  Further, in order to prevent the positional accuracy of the interface connector 121 from being lowered by reducing the area of the connector board 12, the case 11 is provided with a bush 220, and a small-diameter portion 220 </ b> A formed on the upper side of the bush 220 is formed on the connector board 12. Screwed in the state fitted in the hole 123.

  The connector substrate 12 can be accurately positioned in the horizontal direction and the height direction by the small-diameter portion 220A of the bush 220, so that troubles in insertion / extraction of the interface connector 121 can be prevented and the reliability of signal conduction can be improved. .

  Moreover, since the connector board | substrate 12 can be fixed by screwing from the opening part of case 11, a screwing operation | work can be made easy and an assembly cost can be reduced.

  In the present embodiment, the bush 220 has a cylindrical shape, but is not limited thereto, and may have a square shape or any shape as long as the small diameter portion 220A that fits into the hole 123 is provided. In addition, the bush 220 is provided only in the vicinity of the corner of the case 11, but the bush 220 may be provided instead of the pedestal 221 at the other fixed portion. Further, the bush 220 is fixed to the case 11 by caulking, but the bush 220 may be fixed to the case by other methods such as adhesion or screwing.

  In the present embodiment, the interface connector 121 and the FPC connector 122 are mounted on the connector board 12, but the present invention is not limited to this. For example, one connector in which the interface connector 121 and the FPC connector 122 are integrated may be mounted on the connector board 12. Alternatively, the connector in which the interface connector 121 and the FPC connector 122 are integrated may be provided with holes 123 and 124 and screwed into the case. Note that components other than the interface connector 121 and the FPC connector 122 may be mounted on the connector board 12.

DESCRIPTION OF SYMBOLS 10 Optical disk apparatus 11 Case 12 Connector board | substrate 21 Tray 22 Tray side board | substrate 23 Drive apparatus 24 Pickup apparatus 111 Overhang | projection part 120 FPC cable (wiring member)
121 Interface connector (first connector)
122 FPC connector (second connector)
123, 124 Hole 211, 212 Screw 220 Bush 221 Base

Claims (4)

An optical disk device for reading and writing data recorded on an installed optical disk,
A rectangular case,
A tray on which the optical disc is mounted and stored in the case;
A control module for controlling reading and writing of data on the optical disc;
A board having a first connector fixed to a cylindrical bush provided near the corner of the case and serving as an interface with the outside;
With
The bush includes a small diameter portion in which a diameter of a portion in contact with the substrate is smaller than an outer diameter of the bush,
An optical disc apparatus, wherein the substrate is fixed to the case in a state where the hole formed in the substrate and the small diameter portion are fitted. The substrate comprises the holes in two places,
The said one hole is screwed by the said bush provided near the corner | angular part of the said case, and the said other hole is screwed by the base formed protruding from the said case. Optical disk device.   3. The optical disc apparatus according to claim 2, wherein the substrate has a size capable of mounting the first connector and a second connector serving as an interface with the control module. The control module is provided in the tray;
The optical disc apparatus according to claim 3, wherein the control module and a second connector provided on the substrate are connected by a flexible wiring member.

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