JP2006164385A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device capable of reducing weight while securing rigidity, preventing warping, and suppressing the incursion and radiation of an electromagnetic wave. <P>SOLUTION: A rail guide 19 for guiding a rail when a tray is received in a casing and a side face 20 and the rail guide 19 and a bulged part 21 are made of resins to be integral. As the resins, conductive resins containing conductive materials such as carbons are used. The resins are plated with metals, and especially a part on which the rail is slid has lubricity is plated. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disc apparatus that is mounted on an electronic device such as a personal computer, and more preferably that is mounted on a mobile electronic device.

  As optical disk devices, CD-ROM, CD-R / RW, DVD, and the like have already been put into practical use, and application to various areas and development for high performance are being actively carried out. Particularly recently, along with the rapid market expansion of personal computers, the penetration rate of optical disk devices in personal computers has increased, and there has been a demand for thinner and lighter optical disk devices.

  FIG. 8 shows a perspective view of the configuration of a conventional optical disc apparatus. 1 is an optical pickup, 2 is a main shaft, 3 is a sub shaft, 4 is a spindle motor, 5 is a base, 6 is an optical pickup module (PUM), 7 is a tray, 8 is a carriage, 9 is a rail, 10 is a housing, 11 is an optical disk device, 12 is a mounting screw hole on the optical disk device 11 side, 13 is a circuit board constituting a control circuit, etc., and 14 is a frame.

  In FIG. 8, the optical pickup 1 reads and writes data on a disk attached to the spindle motor unit while moving in the radial direction of the spindle motor 4 with the main shaft 2 and the sub shaft 3 as guides. The main shaft 2 and the sub shaft 3 are attached to a base 5 and form an optical pickup module 6 as a whole. The optical pickup module 6 is fixed to the tray 7. The tray 7 is slid with respect to the housing 10 by the rail 9. The tray 7 is pulled out from the housing 10 when the optical disk is attached / detached, and is stored in the housing 10 when reading / writing data. Further, the circuit board 13 constituting the control circuit or the like is attached to at least one of the tray and the casing. With the above configuration, the portable electronic device built-in type optical disc apparatus 11 is formed as a whole.

  FIG. 9 is a diagram showing a method of attaching a conventional optical disc apparatus to a portable electronic device. 15 is a portable electronic device, 16 is an attachment interposed for attachment, and 17 is an attachment side attachment hole.

  In FIG. 9, the housing 10 of the optical disc apparatus 11 main body is provided with a mounting screw hole 12 to be attached to the computer main body. The portable electronic device 15 has an attachment 16 that is interposed in the attachment, and the attachment-side attachment hole 17 and the attachment screw hole 12 on the optical disk device 11 side are screwed, and the attachment 16 is attached to the portable electronic device 15. The optical disk device 11 is mounted and fixed.

  FIG. 10 is a cross-sectional view of a conventional optical disk apparatus cut along a plane perpendicular to the tray pulling direction. 10a is an upper cover, 10b is a lower cover, 10c is a fitting portion between the upper cover and the lower cover, 10d is a disk storage portion, 10e is a drive storage portion, 18 is a disk, and 19 is a rail guide. The cross-sectional shape forms a disk storage portion 10d for storing the optical disk 18 and a drive storage portion 10e for storing the drive mechanism and circuit of the optical disk device, and the shape of both storage portions is mainly composed of the lower cover 10b. Therefore, the lower cover 10b has two bent portions 10f and 10g in order to form the shape of both storage portions. A rail guide 19 is formed in contact with the two bent portions 10f and 10g.

  FIG. 11 is a diagram illustrating a state where the upper cover 10a of the housing of the optical disc apparatus is removed. The rail guide 19 that guides the rail 9 when the tray 7 is housed in the housing is often formed of resin, whereas the side surface portion 20 and the overhang portion 21 of the lower cover 10b are usually made of metal. It is formed with.

  As described above, since the rail guide 19, the side surface portion 20 and the overhang portion 21 of the lower cover 10b are formed as independent parts using different materials, in the assembly process, as shown in FIG. The rail guide 19 is attached to the side surface portion 20 and the overhang portion 21 of the lower cover 10b.

As a prior art regarding a tray guide structure in an optical disc apparatus, for example, there is Patent Document 1.
JP 2003-187511 A

  In recent years, there has been a strong demand for weight reduction of optical disk devices, and this is particularly noticeable in optical disk devices mounted on mobile electronic devices. In order to reduce the weight, it is conceivable to change the material to be used. For example, if the entire housing can be formed using a resin, it greatly contributes to the weight reduction of the optical disk apparatus.

  However, if the entire casing is made of resin, the rigidity is lacking and warpage is likely to occur, and the mechanical strength is weak. In addition, unlike the case of using metal, electromagnetic waves intrude into the housing from the outside, and electromagnetic waves are easily radiated from the inside of the housing to the outside.

  The present invention has been made in order to solve the above-described problems, and an optical disc apparatus capable of realizing weight reduction while ensuring rigidity, preventing the occurrence of warpage, and suppressing intrusion and radiation of electromagnetic waves. The purpose is to provide.

  The present invention has been made in order to solve the above-described problem, and includes a casing configured by fixing an upper cover and a lower cover to each other, a tray on which a driving unit for rotating an optical disk and an optical pickup module are mounted. An optical disk device including a circuit unit constituting a control unit, wherein the upper cover is made of metal, a bottom part of the lower cover is made of metal, a side surface part and a projecting part of the lower cover, and a rail The guide is an optical disc device characterized in that it is made of resin.

  According to the present invention, since the upper cover is made of metal and the bottom portion of the lower cover is made of metal, the rigidity of the entire casing is ensured and the occurrence of warpage is prevented, while the side portion and the tension of the lower cover are prevented. Since the protruding portion and the rail guide are made of resin, weight reduction can be realized.

  According to a first aspect of the present invention, there is provided a casing configured by fixing an upper cover and a lower cover to each other, a tray on which a driving means for rotating an optical disc and an optical pickup module are mounted, and a circuit unit constituting a control unit. The upper cover is made of metal, the bottom of the lower cover is made of metal, and the side and overhang portions of the lower cover and the rail guide are made of resin. An optical disc apparatus characterized by the above.

  Since the upper cover is made of metal and the bottom of the lower cover is made of metal, rigidity of the entire casing is ensured, and the side and overhang portions of the lower cover and the rail guide are prevented while preventing warpage. Since the resin is made of resin, weight reduction can be realized.

  According to a second invention of the present application, in the first invention, the side surface portion of the lower cover and the rail guide are integrally formed of resin, and the protruding portion of the lower cover and the rail guide are integrally formed of resin. Features.

  By integrally molding with resin, the number of assembling steps can be reduced and the factors causing dimensional variations can be reduced, and the assembling accuracy is improved.

  According to a third invention of the present application, in the first or second invention, the resin is a conductive resin.

  By using a conductive resin, it is possible to prevent static electricity from being accumulated around the rail and charging the rail. The conductive resin can be formed by adding a conductive material such as carbon to the resin.

  According to a fourth invention of the present application, in any one of the first to third inventions, the resin is subjected to metal plating or a metal seal is pasted.

  By applying metal plating to the resin or attaching a metal seal, it is possible to prevent electromagnetic waves from entering the casing from the outside and radiating electromagnetic waves from the casing to the outside.

  According to a fifth aspect of the present invention, in the fourth aspect, the metal plating is a plating having lubricity.

  By applying plating having lubricity, it is possible to improve the lubricity at the portion where the rail slides and to smoothly move the rail.

  According to a sixth invention of the present application, in any one of the first to fifth inventions, the attachment portions provided on the side surface portion and the overhang portion of the lower cover are formed by an insert nut.

  By forming the attachment portion with the insert nut, even when the side portion and the overhang portion are formed using resin, the same attachment strength as when formed with sheet metal can be secured.

(Embodiment)
Hereinafter, an optical disk device of the present invention will be described based on an embodiment thereof.

  1 and 2 are a perspective view of the configuration of the optical disc apparatus according to the embodiment of the present invention as viewed from the rear side and a diagram showing a method for mounting the electronic device, and FIG. 3 shows the configuration of the optical disc apparatus according to the embodiment of the present invention. It is the perspective view which looked at from the surface. 1 is an optical pickup, 2 is a main shaft, 3 is a sub shaft, 4 is a spindle motor, 5 is a base, 6 is a pickup module (PUM), 7 is a tray, 8 is a carriage, 9 is a rail, 10 is a housing, 11 Is an optical disk device, 12 is a mounting screw hole on the optical disk device side, 13 is a circuit board constituting a control circuit, 14 is a frame, 15 is a portable electronic device, 16 is an attachment interposed in the mounting, 17 is an attachment side mounting hole , 19 is a rail guide.

  The housing 10 includes an upper cover 10a and a lower cover 10b. The bottoms of the upper cover 10a and the lower cover 10b are made of a material that holds the structural members of the optical disk device 11 and can maintain sufficient strength to be fixed to an electronic device. Iron, iron alloy, aluminum, aluminum alloy, A metal material such as a magnesium alloy, particularly a lightweight metal material such as aluminum or an aluminum alloy is desirable. Further, a plating film or the like may be provided on the surface in order to improve the corrosion resistance or the like. The upper cover 10a has a flat plate shape, but has a side surface 10q that is substantially perpendicular to the end portion.

  FIG. 4 shows a state in which the upper cover 10a of the housing of the optical disk apparatus shown in FIG. 3 is removed. In the present embodiment, the rail guide 19 and the side surface portion 20 that guide the rail 9 when the tray 7 is housed in the housing, and the rail guide 19 and the overhang portion 21 are integrally formed of resin. Yes. As the resin, a conductive resin containing a conductive substance such as carbon is used. By using a conductive resin, it is possible to prevent static electricity from being accumulated around the rail 9 and charging the rail 9.

  Further, the above resin is subjected to metal plating, and in particular, the portion on which the rail 9 slides is plated with lubricity. The metal plating prevents electromagnetic waves from entering the casing from the outside and radiating electromagnetic waves from the casing to the outside, and lubricity at the portion where the rail 9 slides. The movement of the rail 9 can be made smoother by increasing. It is also possible to attach a metal seal instead of plating.

  The attachment portion 22 is formed by an insert nut. By forming the attachment portion 22 with an insert nut, even when the side surface portion 20 and the overhang portion 21 are formed using resin, the same attachment strength as when formed with sheet metal can be secured.

  FIG. 5 shows a state in which the side surface portion 20 and the overhang portion 21 integrally formed with the rail guide 19 are attached to the bottom case 24. FIG. 6 is a view as seen from the lower surface side of the lower cover 10 b, and the side surface portion 20 and the overhang portion 21 are firmly fixed to the bottom case 24 by welding the attachment pins 23.

  FIG. 7 shows an AA sectional view of the lower cover 10b and a detailed sectional view of the rail guide 19 in comparison with the conventional one. (A) is a conventional one, and (b) is according to an embodiment of the present invention. In the prior art, the rail guide 19 is formed separately from the side surface portion 20 and the overhang portion 21, but in the embodiment of the present invention, the rail guide 19 and the side surface portion 20, and the rail guide 19 and the overhang portion 21 are formed. The protruding portion 21 is integrally formed of resin.

  The present invention is mounted on an electronic device such as a personal computer, and more preferably, can be used as a preferable optical disk device to be mounted on a mobile electronic device, and is lightweight while maintaining the mechanical strength of the casing. Can be realized.

The perspective view which looked at the composition of the optical disc device in an embodiment of the invention from the back side The figure which shows the method of attaching the optical disk apparatus in embodiment of this invention to an electronic device The perspective view which looked at the structure of the optical disk apparatus in embodiment of this invention from the surface The figure which shows the state which removed the upper cover of the housing | casing of the optical disk device in embodiment of this invention The figure which shows a mode that the side part and overhang | projection part which integrally formed the rail guide are attached to a lower cover View from bottom side of lower cover Figure showing a cross section of the rail guide The perspective view which looked at the composition of the conventional optical disk device from the back The figure which shows the method of attaching the conventional optical disk apparatus to an electronic device Sectional view of the center of a conventional optical disk device cut by a plane perpendicular to the tray pulling direction The figure which shows the state which removed the upper cover of the housing | casing of the conventional optical disk apparatus Diagram showing how to install rail guide

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical pick-up 2 Main shaft 3 Sub shaft 4 Spindle motor 5 Base 6 Optical pick-up module 7 Tray 7a Rail holding part 8 Carriage 9 Rail 10 Case 10a Upper cover 10b Lower cover 10c Upper cover and lower cover fitting part 10d Disc storage Part 10e Drive housing part 10f, 10g Bending part 10q Side face 11 Optical disk device 12 Mounting screw hole 13 Circuit board 14 Frame 15 Portable electronic device 16 Attachment 17 Attachment side attachment hole 18 Optical disk 19 Rail guide 20 Side face part 21 Overhang part 22 Attachment Part 23 Mounting pin 24 Bottom case

Claims (6)

An optical disk apparatus comprising a casing configured by fixing an upper cover and a lower cover to each other, a tray on which an optical pickup module is driven and a drive unit that rotates an optical disk, and a circuit unit that constitutes a control unit. The optical disk apparatus is characterized in that the upper cover is made of metal, the bottom part of the lower cover is made of metal, and the side and overhang parts of the lower cover and the rail guide are made of resin. 2. The optical disk apparatus according to claim 1, wherein the side surface portion of the lower cover and the rail guide are integrally formed of resin, and the projecting portion of the lower cover and the rail guide are integrally formed of resin. 3. The optical disc apparatus according to claim 1, wherein the resin is a conductive resin. 4. The optical disc apparatus according to claim 1, wherein the resin is subjected to metal plating or a metal seal. 5. The optical disc apparatus according to claim 4, wherein the metal plating is a plating having lubricity. 6. The optical disc apparatus according to claim 1, wherein the attachment portions provided on the side surface portion and the overhang portion of the lower cover are formed by insert nuts.

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