JP4269865B2 - Optical disk device - Google Patents

Description

  The present invention relates to an optical disk device mounted on an electronic device such as a personal computer or a notebook computer.

  FIG. 9 is a perspective view showing a conventional optical disc apparatus.

  In FIG. 9, reference numeral 1 denotes an optical disk device. The optical disk device 1 includes a housing 2 and a tray 3 that is held in the housing 2 so as to be able to appear and retract. The housing 2 includes a housing portion 2a and a housing portion 2b. An optical disk mounting area 3d is provided in a portion of the tray 3 that faces the disk when the disk is mounted, and the outer periphery is circular according to the shape of the optical disk. An optical disk mounting area outside 3e is provided outside the optical disk mounting area 3d, and the optical disk mounting area 3d forms a recess with respect to the optical disk mounting area outside 3e. The optical disk mounting area 3d and the outside of the optical disk mounting area 3e are connected by a step 3h. In addition, an opening 3c is provided in the optical disc mounting area 3d, and the optical pickup module 4 is attached to the opening 3c by being inserted from the back surface. Therefore, most of the optical pickup module 4 is exposed on the disk mounting surface side, but a part thereof is disposed on the back side of the optical disk mounting area outside 3e. For this reason, an avoiding portion 3i is provided in the adjacent step portion 3h in order to avoid a collision with the optical pickup module 4. The avoidance part 3i is provided at least over the range of the width B of the optical pickup module 4 in the step part 3h.

  Rails 3 a are provided on both sides of the tray 3 so as to be movable. The rails 3 a are held by rail holding portions 3 b provided integrally with the tray 3. In FIG. 9, the rail 3a is provided only on one side, but a similar rail or the like is provided on the other side. The optical pickup module 4 has at least a spindle motor 5 for rotating the optical disk, a metal cover 6 provided with an opening 6a from the spindle motor 5 to the outer periphery, and a carriage 7 partially exposed from the opening 6a. . The carriage 7 is movably held by a plurality of guide shafts provided in the optical pickup module 4, and is moved toward and away from the spindle motor 5 by a feed motor (not shown). Reference numeral 8 denotes a bezel provided on the front surface of the tray 3, and the bezel 8 is configured to have a size enough to block the opening of the housing 2.

  The carriage 7 includes a light source such as a high-power laser diode, various optical members, and an objective lens that forms a light spot on the optical disk. When recording on an optical disk, a high output light source, an IC for driving the light source, and the like are required. As a result, the heat generation of the light source and the IC is enormous, and the recording / reproducing characteristics are affected. In particular, in the optical disc apparatus 1 as shown in FIG. 9, since there is a demand for thinning and miniaturization, there is a problem that the heat capacity is lowered. Specifically, this is particularly noticeable in the thin optical disk device 1 in which the thickness of the central portion of the housing 2 is 14 mm or less, and further 10 mm or less.

(Patent Document 1) and (Patent Document 2) describe a method of cooling by guiding an air flow generated when an optical disk is rotated to a carriage 7, but each of the above-mentioned Patent Documents is originally a housing. No optical disk device having a thickness of 14 mm or less or 10 mm or less at the center of 2 is assumed.
Japanese Patent Laid-Open No. 11-25667 JP 2000-231782 A

  However, each of the above-mentioned patent documents does not assume an optical disc apparatus in which the thickness of the central portion of the housing 2 is 14 mm or less or 10 mm or less. Therefore, even if the thin optical disk device 1 as shown in FIG. 9 is simply provided with an air inflow path or the like, sufficient cooling is difficult and a thermal problem still occurs.

  SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide an optical disc apparatus capable of sufficiently cooling even an extremely thin optical disc apparatus and capable of reducing deterioration in recording / reproducing characteristics. To do.

  In order to solve this problem, the present invention provides a rotary drive means for rotating an optical disk having a disk mounting surface, a carriage provided with at least a light source and various optical members, and a cover provided with a first opening. An optical pickup module, and a tray that supports the optical pickup module, the tray including an optical disc mounting area portion facing the optical disc and an outer portion of the optical disc mounting area provided outside the optical disc mounting area portion. The optical disk mounting area portion and the optical disk mounting area outside portion have a step portion along a rotation axis direction of the rotation driving means and a gap in the step portion, and the optical disk mounted on the disk mounting surface has the gap. The outer edge of the surface opposite to the surface facing the optical disk mounting area is the direction of the rotation axis. Present in the range of definitive the gap, air flow generated by rotation of the optical disc was flow into the gap.

  Since the present invention can circulate the air flow efficiently, it is possible to take measures against heat in an optical disc apparatus that is particularly thin and miniaturized, and it is possible to suppress inconveniences such as deterioration in recording / reproducing characteristics due to heat.

  The invention described in claim 1 includes a rotation driving means for rotating the optical disk having a disk mounting surface, a carriage provided with at least a light source and various optical members, and a cover provided with a first opening. An optical pickup module, and a tray for supporting the optical pickup module, the tray including an optical disc mounting area portion facing the optical disc and an outer portion of the optical disc mounting area provided outside the optical disc mounting area portion. The optical disk mounting area of the optical disk mounted on the disk mounting surface has a mounting area portion and a portion outside the optical disk mounting area having a step portion along a rotation axis direction of the rotation driving means and a gap in the step portion. The outer edge of the opposite surface of the surface facing the portion is the rotation axis direction Is an optical disk device characterized in that the air flow generated by the rotation of the optical disk flows into the gap, and the air flow can be circulated efficiently, so that the optical disk is particularly thin and miniaturized. It is possible to take measures against heat of the apparatus, and to suppress problems such as deterioration of recording / reproducing characteristics due to heat.

  According to the second aspect of the present invention, a part of the optical pickup module is exposed to the second opening provided in the optical disk mounting area, and a part of the optical pickup module is disposed on the back side of the outside of the optical disk mounting area. 2. The optical disc apparatus according to claim 1, wherein the optical disc device is formed between a back surface outside the optical disc mounting area and the optical pickup module, and the air flow can be efficiently circulated through the gap. In addition, it is possible to take measures against heat of the downsized optical disc apparatus.

  According to a third aspect of the present invention, a recess is provided on the back side of the outer portion of the optical disc mounting area, the recess has an opening in a step portion, and the gap is at least one of the recess and the optical pickup module or the optical disc mounting area. 2. The optical disc apparatus according to claim 1, wherein the air flow taken in from the opening efficiently circulates through the concave portion, so that the heat countermeasure of the thin and miniaturized optical disc apparatus is provided. Can be performed effectively.

  The invention according to claim 4 is characterized in that the opening portion is opposed to the first opening and further extends in a direction opposite to the disk rotation direction with respect to the first opening. 3. The optical disk device according to 3, wherein an air flow generated at the outer edge of the disk by the rotation of the disk can be taken in effectively.

  According to a fifth aspect of the present invention, the recess is substantially perpendicular to the tray pulling direction and is formed on the tray so as to be opposed to the first side wall and the first opening formed on the tray. 4. The optical disk apparatus according to claim 3, wherein the optical disk apparatus includes a parallel second side wall and a bottom wall formed on the tray, and the air flow generated at the outer edge of the disk due to the rotation of the disk is effective. The high-output light source or light source mounted on the carriage is efficiently taken into the area on the opposite side of the tray from the optical disk mounting side (the space sandwiched between the tray 3 and the housing portion 2b) from the first opening. The driving IC and the like can be effectively cooled.

  The invention according to claim 6 is the optical disc apparatus according to claim 5, wherein the second side portion forms an inclined surface inclined with respect to the bottom wall, and the air flow is effectively reduced by the inclined surface. It is possible to guide from the first opening to a region of the tray opposite to the optical disk mounting side (a space sandwiched between the tray 3 and the housing portion 2b).

  The invention according to claim 7 is the optical disk apparatus according to claim 3, characterized in that a raised portion is provided in an outer portion of the optical disk mounting area facing the recess when viewed from the disk rotation axis direction. A concave portion that effectively takes in the generated airflow can be formed without increasing the thickness of the entire tray.

  The invention according to claim 8 is the optical disk apparatus according to claim 7, wherein the raised portion is formed of a separate member from the tray, and the raised portion is formed by attaching the separate member to the tray. Thus, the thickness of the concave portion can be set more flexibly, and the degree of design freedom can be increased.

  The invention according to claim 9 is the optical disc apparatus according to claim 1, wherein a part of the first opening is arranged to face the back side of the portion outside the optical disc mounting area. Effectively, the first opening can be led to a region of the tray opposite to the optical disc mounting side.

  According to a tenth aspect of the present invention, a part of the first opening is arranged to face the back side of the portion outside the optical disc mounting area, and the opposing part of the first opening is formed wider than the other part. The optical disk apparatus according to claim 1, wherein the intake of the air flow from the first opening can be made more efficient.

  The invention according to claim 11 is the optical disc apparatus according to claim 1, wherein the thickness of the central portion of the casing is 14 mm or less (or 10 mm or less). In such a thin optical disc apparatus, It is particularly effective.

(Embodiment 1)
Embodiments of an optical disk device according to the present invention will be described below.

  1 and 2 are perspective views showing an optical disk apparatus according to an embodiment of the present invention, FIG. 3 is a view of the optical disk apparatus according to an embodiment of the present invention as viewed from the surface (disk mounting side), and FIG. The figure which looked at the tray of the optical disk device in one embodiment of the invention from the back surface (the side opposite to the disk loading side), FIG. 5 is the view of the tray of the optical disk device in one embodiment of the present invention from the front surface (disk loading side) FIG. 6 is a partial cross-sectional view of an optical disc apparatus according to an embodiment of the present invention. FIG. 7 is a view of the optical disc apparatus according to another embodiment of the present invention as viewed from the front surface (disc mounting side). 8 is a diagram showing the flow of air flow.

  In FIG. 1, reference numeral 1 denotes an optical disk device, and the optical disk device 1 has a housing 2 and a tray 3 held in the housing 2 so as to be able to appear and retract. FIG. 1 shows a state in which the tray 3 is pulled out from the housing. The housing 2 has a bag-like configuration by combining the housing portion 2a and the housing portion 2b in the same manner as in the conventional technology, and the tray 3 protrudes from the opening of the housing 2. 2 and 3 are views showing a state in which the tray 3 is housed in the housing 2, and the housing portion 2a is removed for explanation.

  The housing part 2a and the housing part 2b are preferably firmly fixed to each other using a locking means and a spiral which are not shown. As the constituent material of the housing 2, a conductive material such as a metal material such as iron, iron alloy, aluminum, aluminum alloy, and magnesium alloy is preferably used. In addition, a structure in which each casing is made of a resin material and a highly conductive metal film is formed thereon using a technique such as electrodeposition may be used. Furthermore, each of the housing part 2a and the housing part 2b may be made of the same kind of material, or may be made of different materials. In addition, the average thickness of the main plane portion of each of the housing portion 2a and the housing portion 2b is between 0.3 mm and 1.6 mm, and when the average thickness is relatively thin, the housing portion 2a and the housing portion. The body part 2b is made of a metal material, and is formed, for example, by pressing a metal plate. Further, when the average thickness is relatively large, the casing 2a and the casing 2b are made of die casting (aluminum, magnesium alloy, etc.).

  The tray 3 is composed of a resin frame. An optical disk mounting area 3d is provided in a portion of the tray 3 that faces the disk when the disk is mounted, and the outer periphery is circular according to the shape of the optical disk. An optical disk mounting area outside 3e is provided outside the optical disk mounting area 3d, and the optical disk mounting area 3d is about 1.5 mm to 4 mm (same as the thickness of the optical disk to be mounted) with respect to the optical disk mounting area outside 3e. Slightly larger extent) A depressed recess is formed. In the present embodiment, the tray 3 has a substantially square shape, and the optical disk having the maximum diameter to be mounted assumes a disk shape. Therefore, the optical disk mounting area 3d has a substantially circular shape as described above, and The diameter of the optical disk mounting area 3d is the same as the diameter of the largest optical disk that can be mounted, or about 1 mm to 7 mm larger. The outside 3e of the optical disk mounting area has a generally triangular shape. The optical disk mounting area 3d indicates an area including a portion facing the optical disk and having a slight gap on the outer periphery when the optical disk is mounted. The outer optical disk mounting area 3d is the main surface of the optical disk. This is a region that does not face at all.

  An opening 3c is provided in the optical disc mounting area 3d, and the optical pickup module 4 is attached to the opening 3c by being inserted from the back surface. Most of the optical pickup module 4 is exposed on the optical disk mounting surface side, and a part is disposed on the back side of the optical disk mounting area outside 3e. For this reason, an avoiding portion 3i is provided in the adjacent step portion 3h in order to avoid a collision with the optical pickup module 4.

  A spindle motor 5 is provided substantially at the center of the optical disk mounting area 3d. At least a part of the spindle motor 5 protrudes from the opening 3c, and the carriage 7 and the cover 6 are also exposed.

  Reference numeral 8 denotes a bezel provided on the front end surface of the tray 3, and the bezel 8 is configured to have a size enough to block the opening of the housing 2.

  Further, rails 3 a are provided on both sides of the tray 3 so as to be freely movable. The rails 3 a are held by rail holding portions 3 b provided integrally with the tray 3. In FIG. 1, the rail 3a is visible only on one side, but a similar rail or the like is provided on the other side.

  The optical pickup module 4 has at least a spindle motor 5 for rotating the optical disk, a metal or resin cover 6 provided with an opening 6a from the spindle motor 5 to the outer periphery, and a carriage 7 partially exposed from the opening 6a. is doing. The carriage 7 is equipped with a light source such as a high-power laser diode, various optical members, an objective lens that forms a light spot on the optical disk, an IC that drives the light source, and the like. The carriage 7 is movably held by a plurality of guide shafts (not shown) provided in the optical pickup module 4, and is moved toward and away from the spindle motor 5 by a feed motor (not shown). Move to.

  Next, the configuration around the avoidance unit 3i will be described in detail. The avoidance portion 3i is provided substantially over the width B of the optical pickup module 4 so as to avoid a collision with the optical pickup module 4 at the step portion 3h. Moreover, the avoidance part 3i forms a part of the opening 3c. The optical pickup module 4 enters the back surface 3j side of the outside 3e of the optical disk mounting area through the avoidance unit 3i (see FIG. 4). Therefore, in the part where the optical pickup module 4 enters the back surface 3j side of the optical disk mounting area outside 3e, the optical pickup module 4 and the back surface 3j of the optical disk mounting area outside 3e face each other, and the opening 6a and the back surface 3j face each other. ing.

  Usually, the optical pickup module 4 is fixed to the tray 3 via a damper so as not to receive vibration from the outside, so that the optical pickup module 4 may move slightly with respect to the tray 3. Therefore, in order to avoid a collision, an avoidance portion 3i is provided, and a slight gap is provided between the back side 3j of the outside 3e of the optical disc mounting area and the optical pickup module 4.

  A recess 3l having an opening 3k in a step 3h is provided on the back surface 3j of the outside 3e of the optical disk mounting area. The opening 3k is provided in the stepped portion 3h in addition to the avoiding portion 3i.

  The recess 3l has a generally triangular shape when viewed from the disc rotation axis direction. The side wall corresponding to one side of the recess 3l is a substantially circular tangent when the optical disc mounting area 3d is viewed from the disc rotation axis direction, and is a part of the tangent extending from the contact point in the direction of rotation of the disc. It is along the outline (F in FIG. 3). The other side corresponds to a part of a substantially circular arc when the step 3h is viewed from the disk rotation axis direction (H in FIG. 3), and an opening 3k is provided in this part. The side wall corresponding to the other side is in the vicinity of the opening 6a and along a part of a straight line passing through the center of rotation of the spindle motor 5 (G in FIG. 3). The recess 3l forms a substantially flat bottom wall 3n excluding the peripheral portion. As for the shape of the side wall, there is a low wall 3n in a portion (G in FIG. 3) that is near one side of the opening 6a on one side of the above-mentioned general triangular shape and that runs along a part of a straight line passing through the rotation center of the spindle motor 5. An inclined surface 3p connected from the side is provided.

As shown in FIG. 6 which is a DD ′ sectional view of FIG. 5, the bottom wall 3n forms a gap between the optical disc mounting area 3d or the cover 6 of the optical pickup module 4, and the opening 3k is formed in the step 3h. Forming. At the time of mounting the optical disk, at least the outer edge portion of the label surface 9b of the optical disk 9 (the surface opposite to the surface facing the optical disk mounting area portion 3d) is present within the gap in the optical disk rotation axis direction. Alternatively, the bottom wall 3n is substantially flush with the label surface 9b of the disk 9 when the optical disk is mounted, or the low wall 3n is farther from the optical disk mounting area 3d in the disk rotation axis direction than the label surface 9b. . Preferably, the low wall 3n is farther from the optical disc mounting area 3d in the disc rotation axis direction than the label surface 9b, and has a gap E between the low wall 3n and the label surface 9b in the disc rotation axis direction.

  On the other hand, a raised portion 3m is provided on the front side of the optical disc mounting area outside 3e. The raised portion 3m is provided at least wider than the range of the recess 3l on the back surface 3j when the tray 3 is viewed from the disk rotation axis direction. The shape of the raised part 3m is set so that it may become. Further, the height of the raised portion 3m is set so as not to collide with the casing 2 at least when the tray 3 is stored in the casing 2. In addition, the thickness between the semi-recessed portion 3l and the raised portion 3m on the back surface 3j is set in consideration of strength, workability, and the like. For example, when the entire tray is formed by a molded product by injection molding, the moldability is reduced. Considering it, it is desirable that the thickness of the thinnest part is 0.5 mm or more.

  The raised portion 3m may be configured separately from the tray 3. That is, the raised portion 3m may be formed as a separate part and pasted at a predetermined position. In this case, by appropriately setting the material of the raised portion 3m, it is possible to reduce the wall thickness while ensuring the strength, so that the product can be made thinner.

  With respect to the opening 6a of the cover 6, the end of the opening 6a on the side of the bezel 8 has a rectangular shape in the prior art, but in the present embodiment, other parts are located in the vicinity of the part facing the back surface 3j. It is wider than that and forms an enlarged portion 6b.

  According to such a configuration, the air flow generated by the optical disk rotated and driven by the spindle motor 5 is a relatively strong air flow around the outer periphery of the optical disk, and the air flow passes through the opening 3k and passes through the tray. 3 efficiently flows into a region opposite to the optical disc mounting side (space sandwiched between the tray 3 and the housing portion 2b). Then, in the area on the opposite side, there is a carriage 7 on which a high-output light source, a light source driving IC, and the like are mounted. Etc. can be cooled. Further, the air flow generated by the rotating optical disc is strong in the tangential direction of the optical disc at the outer peripheral edge of the optical disc, and the tangent extended in the direction of rotation of the disc having the shape of the recess 3l. This part can be picked up efficiently as indicated by an arrow A in FIG. Further, by providing the inclined surface 3p, the direction of the air flow entering from the opening 3k can be changed, and the air can be efficiently guided from the opening 6a to the region opposite to the optical disc mounting side of the tray 3.

  Further, since the enlarged portion 6b is formed, the air flow can be further efficiently guided to the region of the tray 3 on the side opposite to the optical disc mounting side. It is desirable that the opening 6a is not exposed to the front surface by being formed in the vicinity of the portion facing the back surface 3j. By doing so, it is possible to reduce the user's touch with the precision parts of the optical pickup module 4.

  Since the inclined surface 3p has the above-described action, it is preferable that the entire inclined surface 3p or most of the inclined surface 3p is within the range of the opening 6a when viewed from the disk rotation axis direction. The end portion (G in FIG. 3) of the inclined surface p is preferably in the range of the opening 6a or in the vicinity of the edge of the opening 6a when viewed from the disc rotation axis direction. By doing so, the airflow can be directed to the inclined surface 3p as shown by the arrow A in the CC 'sectional view in FIG.

Further, since the distance between the label surface 9b of the optical disk and the back surface of the housing 2 is larger than the distance between the data surface 9a of the optical disk and the optical disk mounting area 3d and the air layer is large, the outer peripheral edge of the optical disk is rotated by the optical disk driven to rotate. The air flow generated at the side of the label surface 9b tends to be stronger than the direction of the rotation axis direction data surface 9a. On the other hand, in the embodiment of the present invention, the low wall 3n is substantially flush with the label surface 9b (the surface opposite to the data surface 9a) of the optical disc 9 when the disc is loaded, or the low wall 3n It is farther from the optical disc mounting area 3d in the disc rotation axis direction than the label surface 9b. Therefore, a strong air flow generated near the outer peripheral end label surface 9b of the optical disc can be efficiently taken in from the opening 3k.

  In contrast to the conventional configuration, in this embodiment, it was found that the temperature of the portion including the light source and various optical members mounted on the carriage can be reduced by 4 ° C. or more. That is, if the air flow path is simply configured as in the prior art, effective cooling is difficult in the optical disc apparatus 1 in which the thickness of the central portion of the housing 2 is 14 mm or less or 10 mm or less. With the configuration of the present embodiment, the air flow generated in the optical disk can be guided very effectively to the space between the casing 2b and the tray 3 in which most of the carriage 7 is accommodated. Cooling performance can be obtained.

  The shape of the recess 3l viewed from the disk rotation axis direction includes at least a portion facing the opening 6a, and any shape extending from the portion facing the opening 6a in the direction opposite to the disk rotation direction is possible. . The opening 3k is also extended from the portion facing the opening 6a in the direction opposite to the disk rotation direction. In these shapes, it is possible to effectively guide the air flow generated by the optical disk that is rotationally driven as compared with the prior art. In FIG. 7, the inclined surface 3p is provided so as to cross the opening 6a, and the air flow can be effectively guided.

  FIG. 8 is a diagram showing the flow of the air flow. When the optical disk rotates in the region L1 between the cover 6 and the housing portion 2a, the air flow efficiently passes through the opening 3k and the opening 6a. It can be seen that the carriage 7 loaded with the light source, its driving IC, etc. flows into the area L2, where the air flow (arrow in FIG. 6) is effective, and the air in the area L2 is sufficiently stirred. As shown in FIG. 6, it can be seen that an air flow toward the spindle motor 5 is generated in the region L2 by colliding with other members of the optical pickup module 4. Therefore, since an air flow can be generated along the moving direction of the carriage 7, the air flow can always be applied to the carriage, and the cooling efficiency can be improved.

  In the present embodiment, air is used as the gas flow, but other gases may be used.

  Since the optical disk apparatus of the present invention can circulate the air flow efficiently, it is possible to take measures against heat of an optical disk apparatus that is particularly thin and miniaturized, and suppresses problems such as deterioration of recording / reproducing characteristics due to heat. It can be applied to electronic devices such as personal computers and notebook computers.

1 is a perspective view showing an optical disc apparatus according to an embodiment of the present invention. 1 is a perspective view showing an optical disc apparatus according to an embodiment of the present invention. The figure which looked at the optical disk device in one embodiment of the present invention from the surface The figure which looked at the tray of the optical disk device in one embodiment of the present invention from the back side The figure which looked at the tray of the optical disk device in one embodiment of the present invention from the surface 1 is a partial sectional view of an optical disc apparatus according to an embodiment of the present invention. The figure which looked at the optical disk device in another one embodiment of the present invention from the surface Diagram showing air flow A perspective view showing a conventional optical disc apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 2 Housing | casing 2a, 2b Housing | casing part 3 Tray 3a Rail 3b Rail holding | maintenance part 3c Opening 3d Optical disk mounting area | region 3e Optical disk mounting area | region 3h Step part 3i Avoidance part 3j Back surface 3k Opening part 3l Concave part 3m Protrusion part 3n Low Wall 3p Inclined surface 4 Optical pickup module 5 Spindle motor 6 Cover 6a Opening 6b Enlarged part 7 Carriage 8 Bezel 9 Optical disk 9a Data surface 9b Label surface A Air flow

Claims (11)

An optical pickup module comprising: a rotary driving means for rotating the optical disk having a disk mounting surface; a carriage mounted at least with a light source and various optical members; and a cover provided with a first opening; A tray supporting a pickup module, the tray including an optical disc mounting area portion facing the optical disc and an outer portion of the optical disc mounting area provided outside the optical disc mounting area portion, the optical disc mounting area portion and the optical disc mounting area; The external portion has a step portion along the rotation axis direction of the rotation driving means and a gap in the step portion, and is opposite to the surface facing the optical disc mounting area portion of the optical disc mounted on the disc mounting surface. Of the outer edge portion is present within the range of the gap in the rotation axis direction, Optical disc apparatus airflow generated by rotation of the disc, characterized in that flows into the gap. A part of the optical pickup module is exposed to the second opening provided in the optical disc mounting area, and a part of the optical pickup module is disposed on the back side corresponding to the outside of the optical disc mounting area. 2. The optical disk apparatus according to claim 1, wherein the optical disk apparatus is formed between the optical pickup modules. A concave portion is provided on the back side of the outer portion of the optical disc mounting area, the concave portion has an opening in a step portion, and the gap is formed between at least one of the concave portion and the optical pickup module or the optical disc mounting area portion. 2. The optical disk apparatus according to claim 1, wherein 4. The optical disk apparatus according to claim 3, wherein the opening is opposed to the first opening and further extends in a direction opposite to the disk rotation direction with respect to the first opening. The recess is substantially orthogonal to the tray pulling direction and is opposed to the first side wall formed on the tray and the first opening, and is formed on the tray and is not parallel to the first side wall. 4. The optical disk apparatus according to claim 3, wherein the optical disk apparatus is formed on a tray and includes a bottom wall. 6. The optical disc apparatus according to claim 5, wherein the second side portion forms an inclined surface inclined with respect to the bottom wall. 4. The optical disk apparatus according to claim 3, wherein a protruding portion is provided in an outer portion of the optical disk mounting area facing the concave portion when viewed from the disk rotation axis direction. 8. The optical disc apparatus according to claim 7, wherein the raised portion is formed of a member different from the tray, and the raised portion is formed by attaching the separate member to the tray. 2. The optical disc apparatus according to claim 1, wherein a part of the first opening is arranged to face the back side of the outside of the optical disc mounting area. 2. A part of the first opening is arranged to face the back side of the outer portion of the optical disc mounting area, and the part of the first opening facing the first opening is formed wider than the other part. The optical disk device described. 2. The optical disc apparatus according to claim 1, wherein a housing for holding the tray in and out is provided, and a thickness of a central portion of the housing is 14 mm or less.

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