JP2005056526A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk in which sufficient measure for needless radiation can be realized. <P>SOLUTION: This optical disk device is provided with a case constituted by combining a pair of cases, a holding member provided so as to put out and put in freely from the case, a rotation drive means rotating the optical disk, a pickup module performing at least either of recording or reproducing of information by irradiating the optical disk with light, and a spacer including at least either of a conductive material or a soft magnetic material, entering and exiting of needless radiation can be suppressed and rattle sound can be reduced by opposing at least a part of the pair of cases through the spacer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an optical disc apparatus mounted on an electronic device such as a personal computer.

  A conventional optical disc apparatus with a built-in computer main body has a structure in which the entire apparatus is housed in a housing, and is generally mounted by incorporating it into the space of the computer main body.

  FIG. 11 is a perspective view showing a configuration of a conventional optical disc apparatus.

  The optical disc apparatus 1 includes a housing 2 and a tray 3, and the tray 3 includes a pickup module 4 and a bezel 5. FIG. 11 shows a state in which the tray 3 is pulled out from the housing 2. Rails 6 are provided on both sides of the tray 3, and both sides are fitted to the rails 7 so as to be slidable in the disk drawing direction. The rail 7 is also fitted to rail guides 8 provided on the inner surfaces of both sides of the housing 2 so as to be slidable in the disk pull-out direction, and the tray 3 can be pulled out of the housing 2 so that the disk can be attached and detached.

  The housing 2 includes an upper cover 2a and a lower cover 2b.

Note that there are the following documents as prior documents. That is, as in (Patent Document 1) and (Patent Document 3), a gap provided when the cases are combined with each other as in the case of providing a shield member from the outside of the housing, or (Patent Document 2) is ensured. There are things to shield.
JP 2000-163947 A Japanese Utility Model Publication No. 3-20096 Japanese Utility Model Publication No. 5-90693

  The upper cover 2a and the lower cover 2b form a housing 2 by locking with a locking portion and screwing. The fixing of both by locking is often performed at a location where screwing is not possible due to the structure. However, the part that depends on the locking requires a certain degree of dimensional tolerance on both locking parts for reasons such as to cope with variations in processing and to facilitate assembly, and therefore there is a slight gap between them. It is inevitable that this will occur. Due to this gap, there is a problem that a contact sound called a chatter sound is generated due to vibration during rotation of the drive. In addition, when sufficient shielding measures have been taken on the side of a personal computer incorporating an optical disk device, it has not been a problem so much, but due to demands for making the personal computer thinner, smaller, lighter, etc., the personal computer itself In recent years, in the environment where personal computers are used, they are increasingly used near devices that emit very large unwanted radiation. Therefore, it is necessary to improve the shielding performance of the optical disc apparatus itself. Conventionally, since the adhesiveness between the upper cover 2a and the lower cover 2b is not sufficient, there has been a problem that the function of shielding unnecessary radiation emitted from the optical disc apparatus 1 required for the housing 2 is lowered. This is because the upper cover 2a and the lower cover 2b have a relatively low elasticity such as a metal material, and therefore when the upper cover 2a and the lower cover 2b are combined, the upper cover 2a and the lower cover 2b are not completely adhered to each other. It is thought that there is a gap, and unnecessary radiation enters and leaves through the gap.

  Further, in (Patent Document 1) and (Patent Document 3), since a shield member is provided from the outside, the outer dimensions are large, which is not suitable for thinning and miniaturization. In (Patent Document 2), the packing is insulated. It is made of a material, and nothing is done about having conductivity and magnetic shielding properties.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an optical disc apparatus capable of realizing a sufficient countermeasure against unwanted radiation.

  In order to solve such a problem, an optical disc apparatus of the present invention includes a casing configured by combining a pair of cases, a holding member provided so as to be able to protrude and retract from the casing, a rotation driving unit that rotationally drives the optical disc, A pickup module that records and / or reproduces information by irradiating light onto an optical disc and a spacer including at least one of a conductive material and a soft magnetic material, and at least part of a pair of cases via the spacer Facing each other.

As a result, the optical disk apparatus of the present invention prevents a contact sound called chatter noise from being generated due to vibrations during rotation of the drive and the like by creating a gap between the upper cover and the lower cover constituting the casing, and The electromagnetic wave shielding effect of the body can be improved, and unnecessary radiation entering and exiting the optical disk apparatus can be reduced.

  According to the first aspect of the present invention, a housing configured by combining a pair of cases, a holding member provided so as to be able to protrude and retract from the housing, a rotation driving means for rotationally driving the optical disc, and irradiating the optical disc with light A pickup module that performs at least one of recording and reproduction of information and a spacer including at least one of a conductive material and a soft magnetic material, and at least a part of the pair of cases is opposed to each other via the spacer. The optical disk device is characterized in that the conduction between a pair of cases can be improved or the gap formed between the cases can be filled, so that unnecessary electromagnetic waves can be prevented from entering and exiting and the shielding effect can be improved. be able to.

  According to a second aspect of the present invention, each of the pair of cases has a main surface portion and a side surface portion standing on the outer peripheral portion of the main surface portion, and the side surface portions of the pair of cases are opposed to each other to form a casing. 2. The optical disc apparatus according to claim 1, wherein a spacer is provided in a gap formed by combining the pair of cases, and the conduction between the pair of cases can be improved or formed between the cases. Since the formed gap can be filled, the entrance and exit of unnecessary electromagnetic waves can be suppressed and the shielding effect can be improved.

  The invention described in claim 3 is an optical disc apparatus according to claim 2, characterized in that a spacer is provided between the side surfaces of the pair of cases, and the spacer can be provided in a relatively wide area. The shield effect can be increased.

  In the invention according to claim 4, the side surface portion of one case of the pair of cases is disposed outside the side surface portion of the other case so that the side surface portions are opposed to each other, and the main surface portion of the one case is 2. The optical disc apparatus according to claim 1, wherein a spacer is sandwiched between a portion of the other case facing the upper end portion of the side surface portion, and the shielding effect can be reliably increased.

The invention according to claim 5 is the optical disk apparatus according to claim 1, wherein the spacer is deformable, and can absorb vibrations of the pair of cases, so that chatter noise and the like can be suppressed. Furthermore, since the gap can be closed with certainty, measures against unnecessary radiation can be realized more reliably.

  The invention described in claim 6 is the optical disk apparatus according to claim 1, wherein the spacer is provided with elasticity, and vibration can be further suppressed.

  The invention described in claim 7 is the optical disk apparatus according to claim 1, wherein a sheet-like body is used as the spacer, and the apparatus itself can be prevented from being enlarged.

  8. An optical disk apparatus according to claim 1, wherein a spacer including a conductive woven fabric and a conductive adhesive provided on at least one surface of the woven fabric is used. It can be easily attached, productivity is improved, and conduction between a pair of cases can be reliably realized.

  According to a ninth aspect of the present invention, there is provided the optical disk apparatus according to the first aspect, wherein a spacer in which a soft magnetic material is covered with an insulator is used, and the gap can be shielded reliably.

  The best mode for carrying out the invention will be described below with reference to the drawings.

  1 is an external view of an optical disc apparatus according to an embodiment of the present invention, FIG. 2 is an external view of a housing of the optical disc apparatus according to an embodiment of the present invention, and FIGS. FIG. 5 is a cross-sectional view taken along the line AA in FIG. 1.

  The optical disc apparatus 1 has a housing 2 and a tray 3, and FIG. 1 shows a state in which the tray 3 is pulled out from the housing 2. The tray 3 is provided with a pickup module 4 and a bezel 5. The pickup module 4 includes a spindle motor 4a that rotates the disk and an optical pickup 4b that performs at least one of an operation of optically reading data recorded on the disk or writing desired data on the disk. The spindle motor 4a has a disk mounting portion 4c for mounting and rotating the optical disk.

  Rails 6 are provided on both sides of the tray 3, and both sides are fitted to the rails 7 so as to be slidable in the disk drawing direction. The rail 7 is also fitted to rail guides 8 provided on the inner surfaces of both sides of the housing 2 so as to be slidable in the disk pull-out direction, and the tray 3 can be pulled out of the housing 2 so that the disk can be attached and detached. The tray 3 has a disk mounting surface 9 formed with a recess, and has a missing portion 9a from which the optical disk partially protrudes when the disk is mounted.

  The housing 2 is made of a material that holds the components of the optical disk device 1 and can maintain sufficient strength to be fixed to the electronic device, and is made of a metal material such as iron, iron alloy, aluminum, aluminum alloy, or magnesium alloy. In particular, a lightweight metal material such as aluminum or 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. Moreover, the housing | casing 2 can maintain intensity | strength with thin thickness, and may be the resin material provided with electroconductivity.

The upper cover 2a has a flat plate shape, but has a part of the side surface portion 2c bent at a substantially right angle at the end portion. In FIG. 4, the lower cover 2b is provided with side portions 2e, 2f and 2g which are bent substantially at right angles to the bottom surface portion 2d on three sides which are not the drawer side of the tray 3 among the four sides of the square or rectangular bottom surface. Of the three side surfaces substantially perpendicular to the bottom surface portion 2d, the distance between the side surface portion 2e and the side surface portion 2g parallel to the pull-out direction of the tray 3 is smaller than the diameter of the largest optical disk to be mounted. The end of is substantially parallel to the bottom surface portion 2d and is bent to the side opposite to the bottom surface portion 2d with respect to the side surface portion 2g, forming a quasi-bottom surface portion 2h. Further, a distance from the side surface portion 2e is secured at the end of the quasi-bottom surface portion 2h so as not to interfere with the maximum disc diameter, and the side surface portion 2g is substantially parallel to the side surface portion 2e and to the quasi-bottom surface portion 2h. A side surface portion 2i is formed on the opposite side to. In a state in which the housing 2 is configured by the upper cover 2a and the lower cover 2b, several portions between the side surface portion 2c of the upper cover 2a and the side surface portions 2e, 2f, 2g, 2i of the lower cover 2b are opposed to each other. .

  The upper cover 2a and the lower cover 2b are provided with locking portions 2j and 2k, respectively. In the case of the present embodiment, the locking portion 2j is configured by a claw-shaped piece, the locking portion 2k is configured by a through hole, and the locking portion 2j is inserted into the locking portion 2k that is a through hole. Although the locking part 2j is in contact with and locked to the outer peripheral part of the through hole of the locking part 2k, the locking part 2k may be a claw-like piece and the locking part 2j may be a through hole. The upper cover 2a and the lower cover 2b are provided with screwing portions 2l and 2m, respectively. The upper cover 2a and the lower cover 2b are locked by the locking portions 2j and 2k, and the screwing portions 21 and 2m are screwed, whereby the upper cover 2a and the lower cover 2b are fixed to form the housing 2. In fixing the upper cover 2a and the lower cover 2b in the vicinity of the quasi-bottom surface 2h, the screw tip may hit the disk in the case of screwing. Since the side surface portion 2c of the upper cover 2a and the side surface portion 2i of the lower cover 2b are opposed to each other with the side surface portion 2c of the upper cover 2a facing the outside of the housing 2, the claw of the locking portion 2j of the upper cover 2a The shaped piece is inserted and locked from the outside of the housing 2 into the 2k through hole of the locking portion of the lower cover 2b. Further, the upper end portion 2n of the side surface portion 2i faces the top surface portion 2p of the upper cover 2a.

  In order to absorb the dimensional variation at the time of press processing of the locking portions 2j and 2k and to facilitate the assembling work, a slight margin is provided for the locking of the locking portions 2j and 2k. That is, the size of the locking portion 2j that is a claw-like body is slightly larger than the locking portion 2k that is a through-hole so that the locking portion 2j can be easily inserted into the locking portion 2k and is not easily released. It is small. Further, after the upper cover 2a and the lower cover 2b are locked, the dimension is set such that the top surface portion 2p of the upper cover 2a and the upper end portion 2n of the side surface portion 2i of the lower cover 2b are not completely adhered to each other.

  The sheet 10 is affixed to the top surface portion 2p, and is provided so as to fill at least part of the gap between the top surface portion 2p and the side surface portion 2i. That is, the sheet 10 is configured to be sandwiched between the top surface portion 2p and the side surface portion 2i. The sheet 10 can be deformed at least in the thickness direction, and preferably has elasticity. The thickness of the sheet 10 is set to be equal to the gap between the top surface portion 2p and the side surface portion 2i or large with respect to the gap as long as it can be absorbed by the elasticity and does not hinder assembly. Further, the sheet 10 has electrical conductivity, and the electrical conductivity between the upper cover 2a and the lower cover 2b is further improved by the presence of the sheet 10. The material of the sheet 10 is a material having elasticity and conductivity, and specifically, a conductive cloth tape or a conductive cloth is desirable. Examples of the structure of the conductive cloth tape include a polyester cloth having a conductive acrylic pressure-sensitive adhesive in which metal particles are dispersed on at least one surface of a conductive cloth plated with copper nickel or the like. . Examples of the conductive cloth include a cloth formed by weaving a conductive yarn in which a metal stay is wrapped around a fiber such as polyvinyl chloride. When using a conductive cloth, it is affixed to the upper cover 2a using a conductive adhesive.

  When a conductive cloth is used as the sheet 10, it is attached to the top surface portion 2p with a conductive adhesive or a double-sided adhesive tape having conductivity, but with a non-conductive adhesive or double-sided adhesive tape. Even if it exists, it is only a part of the contact surface between the sheet 10 and the top surface portion 2p, and the sheet 10 and the top surface portion 2p may be in close contact with each other and conductive. As a result, the conductivity of the upper cover 2a and the lower cover 2b can be further improved while fixing the sheet.

Further, when a conductive cloth tape is used as the sheet 10, a conductive adhesive is provided on the sheet 10, so that no separate adhesive is required as described above, and productivity is improved. There are advantages.

  Further, the sheet 10 may be fixed to the side surface portion 2c of the upper cover 2a and the upper end portion 2n of the side surface portion 2i of the lower cover 2b. Since the sheet 10 is finally sandwiched between the top surface portion 2p and the side surface portion 2i, it may be fixed to the extent of temporary fixing.

  As described above, by providing the sheet 10, by providing the conductive sheet 10 between the upper cover 2a and the lower cover 2b, the conduction between the upper cover 2a and the lower cover 2b can be improved. In addition, by providing the sheet 10 in a slight gap generated when the upper cover 2a and the lower cover 2b are combined, unnecessary electromagnetic waves can be prevented from entering and exiting. Moreover, generation | occurrence | production of a chatter sound etc. can be suppressed by giving the sheet | seat 10 elasticity.

  In the present embodiment, the sheet 10 is provided in a part of the outer peripheral portion of the top surface portion 2p and only at one place. However, as shown in FIG. 6, a plurality of sheets 10 are provided near the side surface portion 2c that is the outer peripheral portion of the top surface portion 2p. It may be provided discretely, and a sheet 10 a having a longer length than the other sheets 10 may be provided. Further, as shown in the sheet 10b, a sheet 10b having a width wider than that of other sheets 10 may be used.

  In this manner, the sheet 10 can be provided on the outer peripheral portion of the plurality of top surface portions 2p with different shapes and dimensions, thereby providing a design range for measures against unwanted radiation. Of course, a plurality of sheets 10 having the same shape and the same dimensions may be provided.

  Moreover, as shown in FIG. 7, the sheet | seat 10 affixing operation | work can also be reduced by providing one long sheet | seat 10 with respect to each edge | side of the top | upper surface part 2p.

  Furthermore, as shown in FIG. 8, the sheet 10 may be provided on the side surface portion 2c instead of providing the sheet 10 on the top surface portion 2p. Also in this configuration, since the gap can be closed with the sheet 10, it is possible to take measures against unnecessary radiation.

  Further, as shown in FIGS. 9 and 10, the sheet 10 may be provided outside the side surface portion 2i of the lower case 2b. As shown in FIG. 10, it is sufficient for the shield surface to interpose the sheet 10 in a portion where the side surfaces of the lower case 2b and the upper case 2a face each other and a part between the upper end 2n and the upper case 2a. In addition, with this configuration, the end portion of the sheet 10 does not protrude into the housing 2, so that problems due to the protruding portion can be eliminated. In addition, even if the end portion 10a of the sheet 10 protrudes, if the problem does not occur so much, the end portion 10c of the sheet 10 may be provided on the entire surface as viewed from the cross section of the upper end portion 2n.

  In the present embodiment, the sheet 10 is provided as a spacer (shielding member). However, as the spacer, a conductive elastic body such as conductive rubber or a soft magnetic material is covered with an insulating material such as a resin film. A shield member may be used.

  Further, the spacer may be configured to have both conductivity and soft magnetic properties.

  The optical disc apparatus of the present invention prevents a contact sound called chatter noise from being generated due to vibration during rotation of the drive, etc., by generating a gap between the upper cover and the lower cover constituting the casing, It can be applied to an optical disk device or the like that can provide an electromagnetic wave shielding effect.

1 is an external view of an optical disc apparatus according to an embodiment of the present invention. 1 is an external view of a housing of an optical disk device according to an embodiment of the present invention. 1 is an external view of an upper cover of a housing of an optical disk device according to an embodiment of the present invention. 1 is an external view of a lower cover of a housing of an optical disk device according to an embodiment of the present invention. Sectional drawing of the optical disk apparatus in one embodiment of this invention The perspective view of the upper cover of the housing | casing of the optical disk apparatus in other embodiment of this invention The perspective view of the upper cover of the housing | casing of the optical disk apparatus in other embodiment of this invention The perspective view of the upper cover of the housing | casing of the optical disk apparatus in other embodiment of this invention The perspective view of the housing | casing of the optical disk apparatus in other embodiment of this invention Sectional drawing of the housing | casing of the optical disk apparatus in other embodiment of this invention The perspective view which shows the structure of the conventional optical disk apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 2 Case 2a Upper cover 2b Lower cover 2c, 2e, 2f, 2g, 2i Side surface part 2p Top surface part 2d Bottom surface part 3 Tray 4 Pickup module 4a Spindle motor 4b Optical pick-up 10, 10a, 10b Sheet

Claims (9)

A case configured by combining a pair of cases, a holding member provided so as to be able to protrude and retract from the case, a rotation driving means for rotating the optical disc, and recording or reproducing information by irradiating the optical disc with light An optical disk apparatus comprising: a pickup module that performs at least one of the above; and a spacer including at least one of a conductive material and a soft magnetic material, wherein at least a part of the pair of cases are opposed to each other via the spacer. . Each of the pair of cases has a main surface portion and a side surface portion erected on the outer peripheral portion of the main surface portion. The side surfaces of the pair of cases are opposed to each other to form a casing, and the pair of cases are combined. 2. The optical disk apparatus according to claim 1, wherein a spacer is provided in the gap formed by the above-described process. 3. The optical disk apparatus according to claim 2, wherein a spacer is provided between the side surfaces of the pair of cases. Among the pair of cases, the side surface portion of one case is disposed outside the side surface portion of the other case so that the side surface portions face each other, and the side surface portion of the other case in the main surface portion of the one case 2. The optical disk apparatus according to claim 1, wherein a spacer is sandwiched between a portion facing the upper end portion. The optical disk apparatus according to claim 1, wherein the spacer is deformable. 2. The optical disk apparatus according to claim 1, wherein the spacer has elasticity. 2. The optical disk apparatus according to claim 1, wherein a sheet-like body is used as the spacer. The optical disk apparatus according to claim 1, wherein a spacer including a conductive woven fabric and a conductive adhesive provided on at least one surface of the woven fabric is used. 2. The optical disk apparatus according to claim 1, wherein a spacer is used in which a soft magnetic material is covered with an insulator.

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