JP2006059431A - Optical disk device and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device capable of suppressing the housing difficulty of a tray in a case by preventing the deformation of the tray and a tray cover caused by fitting shifting between the tray and the tray cover or the shocks in a disk loading direction which occur when an external load is applied. <P>SOLUTION: This optical disk device is provided with at least a case 2, a tray 3 disposed to be freely housed in or pulled out from the case 2, and a metal tray cover 13 disposed in the tray 3. The the tray 3 and the tray cover 13 are fixed to each other by holes formed in the tray 3 and the tray cover 13 by a fixing means for fixing the tray 3 and the tray cover 13 and the fixing means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disc apparatus that performs at least one of recording and reproduction of information on an optical disc by an optical pickup.

  As optical disc apparatuses, CD-ROM / R / RW, DVD-ROM / RAM / R / RW, etc. 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 built-in optical disk devices in personal computers has increased. As a method for mounting an optical disk mounted on an electronic device, a method of pulling out a tray from a housing, attaching a disk to the tray, and mounting it again in the housing (hereinafter referred to as a tray method) is common. The configuration of a conventional tray type optical disk apparatus will be described below with reference to FIGS.

  FIG. 8 is an external view of a conventional optical disc apparatus. In FIG. 8, 1 is an optical disk device, 2a is an upper housing part, 2b is a lower housing part, 3 is a tray, 4 is an optical pickup module, 5 is a rail, 6 is a rail holding part, 7 is a spindle motor, and 7a is a disk. A mounting portion, 8 is a metal cover, 8a is an opening, 9 is a carriage, 10 is a bezel, and 11 is an eject button.

  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 has a bag shape in which a metal upper housing portion 2a and a lower housing portion 2b are combined, and the tray 3 protrudes and emerges from an opening of the housing 2. An optical pickup module 4 is attached to the tray 3 from the back side. Rails 5 are movably provided on both sides of the tray 3, and the rails 5 are held by rail holding portions 6 provided integrally with the tray 3. In FIG. 8, the rail 5 is provided only on one side, but a similar rail may be provided on the other side. The upper housing portion 2a and the lower housing portion 2b are firmly fixed to each other using a locking means and a spiral which are not shown.

  The optical pickup module 4 includes at least a spindle motor 7 that rotates the optical disk, a metal cover 8 that has an opening 8a from the spindle motor 7 to the outer periphery, and a carriage 9 that is partially exposed from the opening 8a. The carriage 9 is movably held by a plurality of guide shafts provided in the optical pickup module 4, and can be moved toward and away from the spindle motor 7 by a feed motor (not shown).

  Reference numeral 10 denotes a bezel provided on the front surface of the tray 3, and the bezel 10 is configured to have a size enough to close the opening of the housing 2. The carriage 9 is equipped with 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. There is a fixed circuit board at the back of the housing 2, and a signal processing IC, a power supply circuit, and the like are mounted on the circuit board. A flexible printed circuit board that is electrically connected to circuit boards (not shown) provided on the tray 3 is formed in a substantially U shape, and an external connector is connected to a power / signal line provided in an electronic device such as a computer. Connected. Then, power is supplied into the optical disc apparatus 1 through the external connector, an external signal is guided into the optical disc apparatus 1, or an electric signal generated by the optical disc apparatus 1 is sent to an electronic device or the like. . The bezel 10 provided on the front end surface of the tray 3 is provided with an eject button 11, and when the eject button 11 is pressed, the engagement portion provided on the housing 2 and the engagement provided on the tray 3 are engaged. The tray 3 can be pulled out from the housing 2 so that the optical disk can be attached and detached.

  FIG. 9 is a plan view of a conventional optical disc apparatus, and is a view seen from the lower housing portion side in a state in which the tray is pulled out from the housing. In FIG. 9, 1 is an optical disk apparatus, 2b is a lower housing part, 3 is a tray, 5 is a rail, 6 is a rail holding part, 10 is a bezel, 11 is an eject button, 13 is a tray cover, and 14 is a spiral.

  A tray cover 13 is provided on the lower housing portion 2 b side of the tray 3. The tray cover 13 is configured in a substantially bag shape in combination with the tray 3, and is fixed to each other by using a locking means (not shown) and a spiral 14 or the like, and is disposed inside the substantially bag shape. Protects optical disk components.

  With the recent miniaturization of personal computers, optical disk devices are required to be thin and light. In particular, a built-in optical disk device mounted on a notebook personal computer or an external optical disk device is highly demanded to be excellent in mechanical strength and light in weight for convenient carrying. The relationship between mechanical strength and weight reduction is contradictory, and it is generally the case that pursuing mechanical strength hinders weight reduction, and the pursuit of weight reduction hinders mechanical strength.

As a prior example, there is (Patent Document 1) and the like.
JP-A-9-17084

  In order to reduce the thickness or weight of an optical disk device, it is indispensable to reduce the thickness and weight of components constituting them. For thinning and lightening, generally, methods such as reducing the material thickness or using lightweight materials are used. In these cases, however, the structure is easily deformed by an external load at the same time. End up.

  FIG. 10 is a view showing a state in which a conventional optical disc apparatus is deformed by an external load, and is a cross-sectional view cut in a direction parallel to the main plane portion of the bezel. FIG. 10A is a diagram showing a state before a load is applied to the disc mounting portion of the optical disc apparatus, and FIG. 10B is a diagram showing a state after a load is applied to the disc mounting portion of the optical disc device. FIG. 11 is a view showing the spiral relationship between the tray, the tray cover, and the spiral when the conventional optical disk apparatus is deformed by an external load. FIG. 11A shows the broken line portion A shown in FIG. FIG. 11B is an enlarged view of the broken line portion A shown in FIG. 10, and is a cross-sectional view when the lower housing portion is on the upper side. 10 and 11, reference numeral 2b denotes a lower casing, 3 denotes a tray, 13 denotes a tray cover, 14 denotes a spiral, and 16 denotes a through hole.

  When a light-weight material is used for the tray cover 13 or the thickness of the tray cover 13 is reduced, the optical disk is mounted on the disk mounting portion 7a of the optical disk apparatus 1 as shown by a broken line portion B in FIG. When such a load is generated, the center of the main flat surface portion of the tray 3 and the tray cover 13 is deformed to the lower housing side 2b, and in the fixing portion of the tray 3 and the tray cover 13, FIGS. 11 (a) and 11 (b). As shown in FIG. 10, the tray 3 and the tray cover 13 are fitted and displaced in the direction parallel to the contact surface, and the center of the main plane portion of the tray 3 is largely warped toward the lower housing portion 2 b as shown in FIG. In this state, it becomes difficult to store the tray 3 in the housing 2.

SUMMARY OF THE INVENTION The present invention solves the above-described problems. Even if the thickness of a constituent material is reduced, or a thin or lightweight material using a lightweight material, a tray and a tray cover that are generated when an external load is applied. It is an object of the present invention to provide an optical disc apparatus that can prevent deformation of the tray and the tray cover due to misalignment or impact in the disc mounting direction, and can prevent the tray from being difficult to be accommodated in the housing.

  The present invention has been made to solve the above-described problems, and includes at least a housing, a tray provided in the housing so as to be housed or pulled out, and a metal tray cover provided in the tray. The tray and the tray cover are fixed by the fixing means and the holes formed in the tray and the tray cover by the fixing means for fixing the tray and the tray cover. It is.

  According to the present invention, the tray and the tray cover are fitted in the circumferential direction of the disk surface by fixing the tray and the tray cover by the fixing means and the hole formed in the tray and the tray cover by the fixing means for fixing the tray and the tray cover. Since no deviation occurs, it is possible to prevent the tray and the tray cover from being deformed due to the fitting deviation.

  This makes it possible to reduce the thickness of the constituent materials, or the thin or lightweight materials that use lightweight materials, and the misalignment of the tray and the tray cover that occurs when an external load is applied and the disc mounting direction. It is possible to realize an optical disc apparatus that can prevent the tray and the tray cover from being deformed by an impact or the like and can prevent the tray from being difficult to be accommodated in the housing.

  The invention according to claim 1 comprises at least a casing, a tray provided in the casing so as to be freely housed or pulled out, and a metal tray cover provided in the tray, the tray and the tray cover. Is fixed by the fixing means and the holes formed in the tray and the tray cover by the fixing means for fixing the tray and the tray cover. Since the tray and the tray cover are fixed by the fixing means for fixing the tray and the tray cover and the fixing means, the tray and the tray cover are closely and firmly adhered to each other, so that an external load is applied. Even in such a case, the positional relationship between the tray and the tray cover can be maintained, and the disc displacement in the circumferential direction of the disc surface can be prevented. Therefore, the thickness of the constituent material of the optical disc apparatus can be reduced, or a lightweight material can be used. Even if it is thin or lightweight, it can prevent deformation of the tray and tray cover due to misalignment of the tray and tray cover that occurs when an external load is applied, making it difficult to store the tray in the housing Can be suppressed.

  The invention according to claim 2 is characterized in that the fixing means is a spiral, and the fixing portion is configured to sandwich the tray cover between the spiral and the tray. The fixing means is a spiral, and the fixing portion is configured so that the tray cover is sandwiched between the spiral and the tray, so that a hole can be formed in the tray and the tray cover with a relatively small force, and the fixing means is formed by the fixing means. Since the tray and tray cover holes can be tightly and firmly attached to each other, the positional relationship between the tray and the tray cover can be maintained even when an external load is applied. Since the misalignment can be prevented, the thickness of the constituent material of the optical disk device is reduced, and even if the light or thin material is thin or light, the tray and tray cover that are generated when an external load is applied It is possible to prevent the tray and the tray cover from being deformed due to the fitting displacement, and to prevent the tray from being difficult to be accommodated in the housing.

The invention according to claim 3 is characterized in that a force point portion of the adhering means is provided on the tray cover side. Since the force point portion of the fixing means is provided on the tray cover side, the force point portion of the fixing means is the surface opposite to the surface on which the optical disk is mounted on the tray. Without damaging the optical disk, it is possible to prevent deformation of the tray and the tray cover due to the misalignment of the tray and the tray cover that occurs when an external load is applied, making it difficult to store the tray in the housing. Can be suppressed.

  The invention described in claim 4 is characterized in that the hole formed in the tray cover by the fixing means is a through hole. Since the hole formed in the tray cover by the fixing means is a through hole, the hole formed by the fixing means on the tray can be realized with an easy configuration.

  The invention according to claim 5 is characterized in that the radial direction of the hole of the tray or the tray cover formed by the fixing means is parallel to the main flat surface portion of the tray cover. Since the radial direction of the hole of the tray or tray cover formed by the fixing means is parallel to the main flat portion of the tray cover, the fixing means, the tray and the tray cover can be effectively fitted in the disk surface circumferential direction. Therefore, it is possible to prevent the tray and the tray cover from being deformed due to the fitting displacement between the tray and the tray cover that occurs when an external load is applied, and it is difficult to store the tray in the housing. Can be suppressed.

  The invention according to claim 6 is characterized in that the tray has a gap formed by at least the surface of the tray, the surface of the tray cover, and the surface of the fixing means. When the tray has a gap formed by at least the surface of the tray, the surface of the tray cover, and the surface of the fixing means, the burrs of the tray cover generated when holes are formed in the tray cover by the fixing means Can be easily released into the gap, so that a hole can be formed in the tray or the tray cover with a relatively small force.

  The invention according to claim 7 is characterized in that the diameter of the fitting portion of the fixing means is the same as the diameter of the hole of the tray cover that is fitted to the fixing means. Since the diameter of the fitting portion of the fixing means and the diameter of the hole of the tray cover to be fitted with the fixing means are the same, the fixing means and the hole of the tray cover are positioned firmly and firmly, so that an external load is applied. Even in this case, the positional relationship between the tray and the tray cover can be maintained, and the disc displacement in the circumferential direction of the disc surface can be prevented, so that the thickness of the constituent material of the optical disc apparatus can be reduced, or a lightweight material can be used. Or even if it is lightweight, it can prevent deformation of the tray and the tray cover due to misalignment of the tray and the tray cover that occurs when an external load is applied, making it difficult to store the tray in the housing. It can be suppressed.

  The invention according to claim 8 is characterized in that at least one of the holes of the tray or the tray cover formed by the fixing means is previously provided with a hole having a diameter smaller than the diameter of the fixing means. It is. By forming at least one of the holes of the tray or the tray cover formed by the fixing means in advance with a hole having a diameter smaller than the diameter of the fixing means, the holes can be formed in the tray or the tray cover with a relatively small force. it can.

  The invention according to claim 9 is characterized in that the previously provided hole is provided with a cut in a radial direction of the hole. Since the holes provided in advance are provided with cuts in the radial direction of the holes, the holes can be formed in the tray or the tray cover with a relatively small force.

(Embodiment 1)
FIG. 1 is an external view of an optical disc apparatus according to an embodiment of the present invention. FIG. 2 is a plan view of the optical disc apparatus according to the embodiment of the present invention, which is a view in which the tray is pulled out from the housing, and is a view from the lower housing portion side. 1 and 2, reference numeral 1 denotes an optical disk device, 2 denotes a housing, 2a denotes an upper housing portion, 2b denotes a lower housing portion, 3 denotes a tray, 4 denotes an optical pickup module, 5 denotes a rail, and 6 denotes a rail holding portion. , 7 is a spindle motor, 7a is a disk mounting portion, 8 is a metal cover, 8a is an opening, 9 is a carriage, 10 is a bezel, 11 is an eject button, 12 is an optical pickup, 13 is a tray cover, and 14 is a spiral. .

  1 and 2, the housing 2 is configured in a bag shape by combining an upper housing portion 2a and a lower housing portion 2b. The upper housing part 2a and the lower housing part 2b are preferably firmly fixed to each other using a spiral or the like. The constituent material of the housing 2 is made of a metal material such as iron, iron alloy, aluminum, aluminum alloy, magnesium alloy, or a resin material. Moreover, the upper housing part 2a and the lower housing part 2b may be made of the same material or different materials. Moreover, the average thickness of the main plane part of each of the upper casing part 2a and the lower casing part 2b is between 0.4 mm and 1.6 mm, and when the average thickness is relatively thin, the upper casing part 2a and the lower housing | casing part 2b are comprised with a metal material, for example, are formed by press work etc. of a metal plate. When the average wall thickness is relatively large, the upper housing portion 2a and the lower housing portion 2b are made of a resin material or die cast (such as an aluminum alloy or a magnesium alloy). When the housing 2 is made of a resin material, the optical disk device 1 can be reduced in weight. Reference numeral 3 denotes a tray that is provided in the housing 2 so as to be freely movable. The tray 3 is composed of a resin frame, and an optical pickup module 4 is provided. The optical pickup module (PUM) 4 includes an optical pickup 12 constituting an optical system, a spindle motor 7 for rotating the disk, and a control circuit (not shown). The optical pickup 12 performs at least one of an operation of writing information to or reading information from the optical disc by irradiating the optical disc with light. The spindle motor 7 has a disk mounting portion 7a for mounting and rotating the disk. There are rail holding portions 6 on both sides of the tray 3, and both sides are fitted to the rails 5 so as to be slidable in the disk pull-out direction. The rail 5 is also fitted to rail guides 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 from the housing 2 so that the disk can be attached and detached.

  There is a fixed control board at the back of the housing 2, and a signal processing system IC, a power supply circuit, and the like are mounted on the control board. A flexible printed circuit board that electrically connects control boards (not shown) provided on the tray 3 is formed in a substantially U shape, and an external connector is connected to a power / signal line provided in an electronic device such as a computer. Connected. Then, electric power is supplied into the optical disc apparatus 1 through the external connector, an electric signal from the outside is guided into the optical disc apparatus 1, or an electric signal generated by the optical disc apparatus 1 is sent to an electronic device or the like. To do. The bezel 10 provided on the front end surface of the tray 3 is provided with an eject button 11. By pressing the eject button 11, an engagement portion (not shown) provided in the housing 2 and the tray 3 are provided. The engagement with the provided engaging portion (not shown) is released.

  A tray cover 13 is provided on the lower housing portion 2 b side of the tray 3. The tray cover 13 has a substantially bag-like configuration in combination with the tray 3 and is fixed to each other using a locking means (not shown) and a spiral 14 and is disposed inside the substantially bag-like shape. The optical disk components are protected.

  Hereinafter, the characteristic part of Embodiment 1 of this invention is demonstrated.

FIG. 3 is a plan view showing a part of the tray cover according to the embodiment of the present invention, showing a spiral relationship between the tray and the tray cover, and viewing the fitting portion of the tray and the tray cover from the lower housing side. It is a figure. 4 is a cross-sectional view showing the tray cover and the mating portion of the tray according to the embodiment of the present invention, and is a cross-sectional view taken along the line AA in FIG. It is. FIG. 5 is a plan view showing an example of a hole in the tray cover according to an embodiment of the present invention, and FIG. 5 (a) shows that the diameter of the hole that has been previously drilled is smaller than the diameter of the fixing means, FIG. 5B shows a case in which the diameter of the hole that has been opened in advance is smaller than the diameter of the fixing means, and a cut is provided. FIG. 6 is a plan view showing a part of the tray cover according to the embodiment of the present invention, in which the fixing means, the tray fixed by the fixing means, and the diameters of the holes previously formed in the tray cover are the same. It is a figure which shows a thing. FIG. 7 is a cross-sectional view showing a part of the tray cover according to the embodiment of the present invention, and is a cross-sectional view taken along the line AA of FIG. 3-7, 3 is a tray, 13 is a tray cover, 14 is a spiral, 15 is a hole, 16 is a through hole, and 17 is a gap.

  As shown in FIG. 2, a tray cover 13 is provided on the side of the lower housing 2b of the tray 3 in order to protect the components mounted on the tray 3 from dust, dust, and external impacts. The tray cover 13 has a substantially bag-like configuration in combination with the tray 3 and is fixed to each other by using a locking means (not shown) and a fixing means such as a spiral 14. The components of the optical disk device 1 that are arranged are protected. As a constituent material of the tray cover 13, a metal material such as stainless steel, iron, an iron alloy, aluminum, an aluminum alloy, and a magnesium alloy is used, and the tray cover 13 is formed by pressing or the like. On the other hand, as a constituent material of the tray 3, a resin material is used and formed by injection molding or the like.

  Here, as shown in FIGS. 3 and 4, the hole, that is, the hole 15 formed by the fixing means for fixing the tray 3 and the tray cover 13, and the through hole 16 are fixed by the fixing means.

  In the present embodiment, the spiral 14 is used as the fixing means, and the fixed portion between the tray 3 and the tray cover 13 is configured to sandwich the tray cover 13 between the spiral 14 and the tray 3. By doing so, the through holes 16 and the holes 15 can be formed in the tray 3 and the tray cover 13 with a relatively small force, and the through holes 16 and the holes formed in the tray 3 and the tray cover 13 by the fixing means. 15 and the fixing means can be tightly and firmly adhered to each other.

  Further, a force point portion of the spiral 14 for fixing the tray 3 and the tray cover 13 is provided on the tray cover 13 side, and a hole formed in the tray cover 13 by the spiral 14 is a through hole 16 and a hole formed by the fixing means. The radial direction is parallel to the main plane portion of the tray cover 13. Since the force point portion of the spiral 14 for fixing the tray 3 and the tray cover 13 is provided on the tray cover 13 side, the force point portion of the fixing means becomes the surface opposite to the surface on which the optical disk is mounted on the tray 3. The optical disk is not damaged by the force point portion of the spiral 14 during mounting. Further, since the hole formed in the tray cover 13 by the spiral 14 is the through hole 16, the hole 15 formed by the spiral 14 on the tray 3 can be realized with an easy configuration. Further, the holes formed in the tray 3 and the tray cover 13 by the spiral 14, that is, the radial direction of the through holes 16 and the holes 15 are parallel to the main plane portion of the tray cover 13. Can be effectively fitted in the circumferential direction of the disk surface.

  Further, in the present embodiment, the through hole 16 or the hole 15 having a diameter smaller than the diameter of the spiral portion of the spiral 14 as shown in FIG. Is provided in advance, or a notch is provided in the radial direction of the hole with respect to the previously provided through hole 16 and hole 15 as shown in FIG. The through hole 16 of the tray cover 13 to be formed and the hole 15 of the tray 3 can be formed with a relatively small force. If the diameter of the holes provided in the tray 3 and the tray cover 13 is completely the same as the diameter of the spiral portion of the spiral 14 as shown in FIGS. The cover 13 can be fixed, but the hole 15 provided in the tray 3, the through hole 16 provided in the tray cover 13, and the hole 15 and the through hole 16 where the fitting tolerance of the fitting portion of the spiral 14 is zero. It is considerably disadvantageous in terms of cost to perform the formation in advance. Therefore, it is preferable that at least one of the holes of the tray 3 or the tray cover 13 formed by the fixing means is provided with a hole having a diameter smaller than that of the fixing means in advance.

  Furthermore, in this embodiment, since the tray 3 has a gap 17 formed by at least the surface of the tray 3, the surface of the tray cover 13, and the surface of the spiral 14, the through hole is formed in the tray cover 13 by the spiral 14. The burr and the like of the tray cover 13 generated when forming 16 can be easily escaped to the gap 17, and holes can be formed in the tray 3 and the tray cover 13 with a relatively small force.

  Here, the conventional fitting between the tray cover 13 and the tray 3 will be described.

  FIG. 12 is a plan view showing a part of a conventional tray cover. FIG. 13 is a cross-sectional view showing a part of a conventional tray cover, which is a cross-sectional view taken along the line AA of FIG. 12 and 13, 3 is a tray, 13 is a tray cover, 14 is a spiral, and 16 is a through hole.

  In the conventional tray 3 and tray cover 13, a resin material is generally used for the tray 3 and stainless steel is used for the tray cover 13. When a resin material is used for the tray 3 and stainless steel is used for the tray cover 13, even if an external load is applied when the optical disk is mounted on the disk mounting portion 7a of the optical disk apparatus 1 shown in FIG. As shown in FIG. 13, there is no fitting displacement between the tray 3 and the tray cover 13 at a level that hinders practical use, and the center of the main plane portion of the tray 3 is large as shown in FIG. It will not be held in a state of being warped to the side.

  However, when lightening the weight, if a light weight material such as an aluminum alloy or a magnesium alloy is used for the tray cover 13 or the thickness of the tray cover 13 is reduced, the strength of the main flat portion of the tray cover 13 is reduced. When an external load is applied when the optical disk is mounted on the disk mounting portion 7a, the center of the main plane portion of the tray 3 and the tray cover 13 is deformed toward the lower housing portion 2b, and the spiral 14 of the tray 3 and the tray cover 13 is deformed. The tray 3 and the tray cover 13 are disengaged in the direction parallel to the contact surface in the fixed portion such as by holding the tray 3 with the center of the main plane portion being largely warped toward the lower housing portion 2b. Therefore, it has been difficult to store the tray 3 in the housing.

  However, in the embodiment of the present invention shown in FIGS. 3 to 5, the tray 3 and the tray cover 13 are formed by forming holes in the tray 3 and the tray cover 13 by fixing means for fixing the tray 3 and the tray cover 13. Since the hole formed by the fixing unit 13 and the fixing unit closely and firmly adhere to each other, the positional relationship between the tray 3 and the tray cover 13 can be maintained even when an external load is applied, and the disk surface circumferential direction is maintained. Since the fitting displacement can be prevented, even if the thickness of the constituent material of the optical disk apparatus 1 is reduced, or the thin or lightweight thing using a lightweight material is used, the tray 3 generated when an external load is applied. It is possible to prevent the tray 3 and the tray cover 13 from being deformed due to the misalignment of the tray cover 13, and to prevent the tray 3 from being difficult to be accommodated in the housing. That. Further, as shown in FIGS. 6 and 7, the diameter of the fixing means for fixing the tray 3 and the tray cover 13, the diameter of the through hole 16 of the tray cover 13 fitted to the fixing means, and the diameter of the hole 15 of the tray 3 are as follows. The same effect can be obtained even if the same dimensions are formed in advance.

In this embodiment, the spiral 14 is used as the fixing means, and the fixing portion between the tray 3 and the tray cover 13 is configured to sandwich the tray cover 13 between the spiral 14 and the tray 3, but the fixing means is limited to the spiral 14. A cylindrical shaft may be used instead. The spiral 14 is preferable if the fixing portion of the tray 3 and the tray cover 13 is configured to sandwich the tray cover 13 between the spiral 14 and the tray 3 with a relatively small force. Further, a force point portion of the spiral 14 for fixing the tray 3 and the tray cover 13 is provided on the tray cover 13 side, and a hole formed in the tray cover 13 by the spiral 14 is a through hole 16 and a hole formed by the fixing means. The radial direction of the spiral cover 14 is parallel to the main plane portion of the tray cover 13. However, the force point portion of the spiral 14 that fixes the tray 3 and the tray cover 13 may be provided on the tray 3 side. The hole formed in 13 may be a hole that is not the through-hole 16, and the radial direction of the hole formed by the fixing means may be perpendicular to the main plane portion of the tray cover 13. When the force point portion of the spiral 14 that fixes the tray 3 and the tray cover 13 is provided on the tray 3 side, the hardness is small in order to prevent the optical point from being damaged by the force point portion of the spiral 14 when the optical disc is mounted 1. Measures such as adding a decorative board or providing a recess are required. In the case where the hole formed in the tray cover 13 by the spiral 14 is not the through hole 16, it is necessary to secure the wall thickness of the tray cover 13 to some extent by setting the force point portion of the spiral 14 to the tray 3 side. This is not very preferable for the lightweight optical disc apparatus 1. The radial direction of the hole formed by the adhering means may be perpendicular to the main plane portion of the tray cover 13, but if it is intended to efficiently prevent the fitting displacement in the circumferential direction of the tray 3 and the tray cover 13. The radial direction of the hole formed by the fixing means is preferably parallel to the main plane portion of the tray cover 13.

  In the present invention, the tray 3 and the tray cover 13 are fixed by the fixing means and the hole formed by the fixing means for fixing the tray 3 and the tray cover 13, but as shown in FIGS. The diameter of the fixing means for fixing the tray 3 and the tray cover 13 and the diameter of the through hole 16 of the tray cover 13 fitted to the fixing means and the diameter of the hole 15 of the tray 3 may be formed in the same dimension in advance. Also in this case, the holes formed in the tray 3 and the tray cover 13 by the fixing means are fixed by the fixing means for fixing the tray 3 and the tray cover 13 as in the case where the holes are formed in at least one of the tray 3 and the tray cover 13. Since the adhering means fits tightly and firmly, the positional relationship between the tray and the tray cover can be maintained even when an external load is applied, and the disc surface circumferential direction Since it is possible to prevent misalignment, a tray and a tray that are generated when an external load is applied even if the thickness of the constituent material of the optical disc apparatus 1 is reduced, or a thin or lightweight material using a lightweight material is used. It is possible to prevent the tray and the tray cover from being deformed due to the cover slippage, and it is possible to prevent the tray from being difficult to be accommodated in the housing. If the diameter of the holes provided in advance in the tray 3 and the tray cover 13 is completely the same as the diameter of the spiral 14, the tray 3 and the tray cover 13 can be fixed with a smaller force. It is disadvantageous in cost to form the hole 15 and the through-hole 16 in advance so that the fitting tolerance of the fitting portion of the through-hole 16 provided in the tray cover 13 and the through-hole 16 provided in the tray cover 13 is zero. Therefore, it is preferable that the holes provided in advance in the tray 3 and the tray cover 13 have a diameter smaller than the diameter of the spiral 14.

  Even if the thickness of the constituent material is reduced or the material is thin and lightweight using a lightweight material, the present invention can be applied to the misalignment of the tray and the tray cover that occurs when an external load is applied and the impact in the disc mounting direction. It is possible to prevent the tray and the tray cover from being deformed, and to prevent the tray from being difficult to be accommodated in the housing, and to an optical disc apparatus that performs at least one of recording and reproducing information with respect to the optical disc by an optical pickup. Adaptable.

1 is an external view of an optical disc apparatus according to an embodiment of the present invention. 1 is a plan view of an optical disc apparatus according to an embodiment of the present invention. The top view which shows a part of tray cover in one embodiment of this invention Sectional drawing which shows the fitting part of the tray cover and tray in one embodiment of this invention The top view which shows an example of the hole of the tray cover in one embodiment of this invention The top view which shows a part of tray cover in one embodiment of this invention Sectional drawing which shows the fitting part of the tray cover and tray in one embodiment of this invention External view of conventional optical disk device Plan view of a conventional optical disk device The figure which shows a mode that the conventional optical disk apparatus deform | transforms with an external load. The figure which shows the relationship between a tray, a tray cover, and a spiral when the conventional optical disk apparatus deform | transforms with an external load. Plan view showing a part of a conventional tray cover Sectional drawing which shows a part of conventional tray cover

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 2 Housing | casing 2a Upper housing | casing part 2b Lower housing | casing part 3 Tray 4 Optical pick-up module 5 Rail 6 Rail holding part 7 Spindle motor 7a Disk mounting part 8 Metal cover 8a Opening 9 Carriage 10 Bezel 11 Eject button 12 Light Pickup 13 Tray cover 14 Spiral 15 hole 16 Through hole 17 Air gap

Claims (9)

And at least a housing, a tray provided in the housing so as to be housed or drawn out, and a metal tray cover provided on the tray, the tray and the tray cover including the tray and the tray cover. An optical disc apparatus, wherein the fixing means is used to fix the tray and the hole formed in the tray cover and the fixing means. 2. The optical disc apparatus according to claim 1, wherein the fixing means is a spiral, and the fixing portion is configured to sandwich the tray cover between the spiral and the tray. The optical disc apparatus according to claim 1, wherein a force point portion of the fixing means is provided on the tray cover side. The optical disc apparatus according to claim 1, wherein the hole formed in the tray cover by the fixing means is a through hole. 5. The optical disk according to claim 1, wherein a radial direction of a hole of the tray or the tray cover formed by the fixing means is parallel to a main flat portion of the tray cover. apparatus. 6. The optical disc apparatus according to claim 1, wherein the tray has a gap formed by at least a surface of the tray, a surface of the tray cover, and a surface of the fixing unit. 7. The optical disc apparatus according to claim 1, wherein a diameter of the fitting portion of the fixing means is the same as a diameter of the hole of the tray cover that is fitted to the fixing means. The hole of the diameter smaller than the diameter of the said adhering means is previously provided in at least one of the hole of the said tray or the said tray cover formed by the said adhering means, The any one of Claims 1-7 characterized by the above-mentioned. The manufacturing method of the optical disk apparatus as described in an item. 9. The method of manufacturing an optical disk device according to claim 1, wherein the hole provided in advance is provided with a cut in a radial direction of the hole.

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