JP2005346860A - Optical disk device and manufacturing method of optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device capable of preventing the fitting deviation of a tray and a tray cover caused when external loads are applied and the deformation of the tray and the tray cover due to an impact in a disk mounting direction or the like and suppressing the tray from becoming difficult to be housed inside a case body. <P>SOLUTION: This optical disk device comprising at least the case body 2, the tray 3 provided so as to be freely housed in or pulled out from the case body 2, a rotary driving means provided on the tray 3, an optical pickup 12 provided on the tray 3, and the tray cover 13 provided on the tray 3, is characterized in that a locking means is provided on at least a part of the part where the tray 3 and the tray cover 13 are brought into contact. <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. Hereinafter, the configuration of a conventional tray type optical disc apparatus will be described with reference to FIGS.

  FIG. 6 is an external view of a conventional optical disc apparatus. In FIG. 6, 1 is an optical disk device, 2 is a housing, 2a is an upper housing portion, 2b is a lower housing portion, 3 is a tray, 4 is an optical pickup module, 5 is a rail, 6 is a rail holding portion, and 7 is a spindle. A motor, 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. 6, 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. 7 is a plan view of a conventional optical disc apparatus, and is a view seen from the lower housing portion 2 b side in a state where the tray 3 is pulled out from the housing 2. In FIG. 7, 1 is an optical disk device, 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 has a substantially bag-like configuration in combination with the tray 3, and is fixed to each other using a locking means and a spiral (not shown), and is disposed in the substantially bag-like interior. Protect 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. 8 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. 8A is a diagram showing a state before a load is applied to the disc mounting portion of the optical disc apparatus and before an impact in the disc mounting direction on the tray is applied, and FIG. 8B is a diagram showing a load applied to the disc mounting portion of the optical disc apparatus. FIG. 6 is a diagram illustrating a state after a shock is applied and an impact in the disc mounting direction is applied to the tray. FIG. 9 is a diagram 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. 9A shows the broken line portion A shown in FIG. FIG. 9B is an enlarged view of the broken line portion A shown in FIG. 8, and is a cross-sectional view when the lower housing portion is on the upper side. 8 and 9, 2b is a lower housing part, 3 is a tray, 13 is a tray cover, 14 is a spiral, and 16 is a hole.

  By using a lightweight material for the tray cover 13 or by reducing the thickness of the tray cover 13, the load applied when the optical disk is mounted on the disk mounting portion of the optical disk apparatus as shown by the broken line portion B in FIG. If an impact in the disc mounting direction occurs on the tray 3 or the tray 3, the center of the main flat 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, FIG. 9 (b), the tray 3 and the tray cover 13 are disengaged in the direction parallel to the contact surface, and the center of the main plane portion of the tray 3 is greatly lower as shown in FIG. 8 (b). The tray 3 is held while being warped, and it becomes difficult to store the tray 3 in the housing.

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 problem, and at least a housing, a tray provided in the housing so as to be housed or pulled out, and a rotation driving means provided in the tray; An optical disc apparatus comprising an optical pickup provided on the tray and a tray cover provided on the tray, wherein a locking means is provided on at least a part of a portion where the tray and the tray cover are in contact with each other. It is characterized by.

  According to the present invention, the engagement means is provided at least at a part of the portion where the tray and the tray cover come into contact with each other, so that the fitting displacement in the circumferential direction of the disk surface is not caused. Deformation of the tray and tray cover can be prevented.

  As a result, even if the thickness of the constituent material is reduced, or a thin or lightweight material that uses a lightweight material, the mating displacement between the tray and the tray cover that occurs when an external load is applied, or the disc to the tray It is possible to realize an optical disc apparatus that can prevent the tray and the tray cover from being deformed due to an impact in the mounting direction and the like and can prevent the tray from being difficult to be stored in the housing.

  The invention according to claim 1 is at least a housing, a tray provided in the housing so as to be housed or pulled out, a rotation driving means provided in the tray, an optical pickup provided in the tray, An optical disk apparatus comprising a tray cover provided on the tray, wherein the locking means is provided at least at a part of a portion where the tray and the tray cover contact each other, and the locking means is provided. Can maintain the positional relationship between the tray and the tray cover, and can prevent misalignment in the circumferential direction of the disk surface, so that the thickness of the constituent material of the optical disk device can be reduced, or a lightweight or lightweight material can be used. Even when the external load is applied, it is possible to prevent the 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. , Trays can be prevented from becoming difficult housed in a housing.

  The invention according to claim 2 is characterized in that the locking means is a convex portion with a tray cover and a concave portion with a tray, and the convex portion and the concave portion are locked. Is constituted of a convex portion and a concave portion, so that the positional relationship between the tray and the tray cover can be reliably maintained, and the fitting displacement in the circumferential direction of the disc surface can be prevented. Prevents deformation of the tray and tray cover due to mating misalignment of the tray and tray cover that occurs when an external load is applied, even if the thickness is thin or thin or lightweight using lightweight materials It is possible to prevent the tray from being difficult to be accommodated in the housing.

The invention according to claim 3 is characterized in that the locking means is a concave portion with a tray cover and a convex portion with a tray, and the convex portion and the concave portion are locked. Is constituted of a convex portion and a concave portion, so that the positional relationship between the tray and the tray cover can be reliably maintained, and the fitting displacement in the circumferential direction of the disc surface can be prevented. Prevents deformation of the tray and tray cover due to mating misalignment of the tray and tray cover that occurs when an external load is applied, even if the thickness is thin or thin or lightweight using lightweight materials It is possible to prevent the tray from being difficult to be accommodated in the housing.

  The invention according to claim 4 is characterized in that the locking means is provided in a portion adjacent to the peripheral edge of the fixing hole of the tray and the tray cover, By providing the recess in the portion adjacent to the peripheral edge of the fixing hole for the tray and the tray cover, the area of the force point of the fixing means for the tray and the tray cover can be reduced, so that a thin or lightweight fixing means can be used. In addition, it is possible to prevent deformation of the tray and the tray cover due to the fitting displacement between the tray and the tray cover that occurs when an external load is applied, and at the same time to suppress the difficulty of storing the tray in the housing. A thin or lightweight optical disk device can be obtained.

  The invention according to claim 5 is characterized in that a portion where the tray and the tray cover come into contact with each other is fixed by a fixing means, and a locking means provided on at least a part of the tray or the tray cover. Can be applied efficiently, the positional relationship between the tray and the tray cover can be reliably maintained, and the disc displacement in the circumferential direction of the disc surface can be prevented. Even if it is thin or lightweight using lightweight materials, 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 It is possible to prevent the tray from being difficult to be accommodated in the housing.

  The invention according to claim 6 is characterized in that the adhering means is a spiral, and the adhering part is configured to sandwich the convex part and the concave part between the spiral and the tray, and at least the tray or the tray cover. Efficient and easy force can be applied to the locking means provided in a part, the positional relationship between the tray and the tray cover can be reliably maintained, and the disc surface circumferential displacement can be prevented. Therefore, even if the thickness of the constituent material of the optical disk device is reduced, or a thin or lightweight material using a lightweight material, it is caused by the misalignment of the tray and the tray cover that occurs when an external load is applied. 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.

  The invention according to claim 7 is a housing, a tray provided in the housing so as to be housed or pulled out, a rotation driving means provided in the tray, an optical pickup provided in the tray, and the tray. And a tray cover provided on the tray cover, wherein the tray cover has a convex portion, and the tray has a concave portion locking means formed by crimping the convex portion provided on the tray cover. Provided in a portion adjacent to the peripheral edge of the tray and the fixing hole of the tray cover, the locking means is configured to be sandwiched between the spiral and the tray, and the tray and the tray cover are fixed by the spiral. By providing the locking means, the positional relationship between the tray and the tray cover can be reliably, efficiently and easily maintained, and the disc surface circumferential displacement can be prevented. Therefore, even if the thickness of the constituent material of the optical disk device is reduced, or a thin or lightweight material using a lightweight material, it is caused by a misalignment between the tray and the tray cover that occurs when an external load is applied. The deformation of the tray and the tray cover can be prevented, and it can be prevented that the tray becomes difficult to be accommodated in the housing.

  The invention according to claim 8 is characterized in that the recess of the locking means is prepared in advance in at least one of the tray or the tray cover before the tray and the tray cover are fitted. Since the convex portion and the concave portion of the means are prepared in advance, the tray and the tray cover can be positioned without requiring much force, and the misalignment in the circumferential direction of the disc surface can be prevented. Tray and tray cover due to misalignment of tray and tray cover that occurs when an external load is applied, even if the material of the equipment is thin or thin or lightweight using lightweight materials It is possible to prevent the tray from being deformed and to prevent the tray from being difficult to be accommodated in the housing.

  The invention according to claim 9 is characterized in that the concave portion of the locking means is formed by pressure-bonding to the convex portion of the locking means, and the concave portion of the locking means is formed by the locking means. The tray and the tray cover can be positioned without being affected by the dimensional error of the convex part, and the misalignment of the disk surface in the circumferential direction can be prevented. Even if the material is thin or 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. It can be suppressed that it is difficult to store in the body.

(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 3 is pulled out from the housing 2 and is viewed from the lower housing portion 2b side. 1 and 2, 1 is an optical disk device, 2 is a housing, 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, 8 is a metal cover, and 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 of the optical disk apparatus according to the embodiment of the present invention, showing the spiral relationship between the tray and the tray cover, and the fitting portion with the tray 3 being the lower housing portion 2b. It is the figure seen from the side. 4 is a cross-sectional view showing a fitting portion between the tray cover and the tray of the optical disc apparatus according to the embodiment of the present invention, which is a cross-sectional view taken along the line AA in FIG. It is a figure of time. FIG. 5 is a plan view showing an example of a convex shape in one embodiment of the present invention. 3, 4, and 5, 3 is a tray, 13 is a tray cover, 14 is a spiral, 15 is a convex portion, 16 is a hole, and 17 is a concave portion.

  A tray cover 13 is provided on the lower housing 2b side of the tray 3 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 using a locking means (not shown) and a spiral 14 and is disposed inside the substantially bag-like shape. The components of the optical disk device 1 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, locking means is provided in at least a part of the portion where the tray 3 and the tray cover 13 are in contact with each other. The locking means includes a convex portion 15 and a concave portion 17, and the convex portion and the concave portion are engaged with each other, thereby locking the member provided with the convex portion and the member provided with the concave portion. Further, the locking portion is fixed by fixing means such as a spiral 14 or caulking so that the convex portion 15 and the concave portion 17 are sandwiched between the spiral 14 and the tray.

  In this embodiment, an aluminum alloy or a magnesium alloy is used as the constituent material of the tray cover 13, and the convex portion 15 of the locking means is formed by pressing or the like so that the tray 3 side of the tray cover 13 becomes a convex surface. The method of forming the convex portion 15 is not limited to press working, but if it is press working, it can be performed simultaneously with the press working at the time of forming the tray cover 13, and there is no need for additional materials. preferable. Further, the convex portion 15 may be formed not only by pressing but also by adding another member.

On the other hand, the concave portion 17 may be prepared in advance in the tray 3 so as to fit well with the convex portion 15, and when the convex portion 15 provided on the tray cover 13 is fitted with the tray 3. You may form by crimping | bonding to the contact surface which opposes. When the concave portion 17 is prepared in advance, a large amount of force is not required, and the tray 3 and the tray cover 13 can be positioned. When the concave portion 17 is formed by being crimped to the convex portion 15, The tray 3 and the tray cover 13 can be positioned without being affected by the dimensional error of the convex portion 15. Since the pursuit of accuracy has been given priority in pursuit of accuracy, the concave portion 17 of the present embodiment is formed by pressing the convex portion 15 provided on the tray cover 13 to the contact surface facing when the convex portion 15 is fitted to the tray 3. In the present embodiment, the convex portion 15 having a height of about 0.5 mm square of about 0.05 to 0.2 mm is adjacent to the peripheral portion of the fixing hole 16 with the tray 3 of the tray cover 13. Four places were provided at intervals of about 90 ° from the center of the fixing hole. The convex portion 15 provided is shaped so that the concave portion 17 fits well with the convex portion 15, and when the tray 3 is prepared in advance, the larger the convex portion 15, the better the convex portion provided on the tray cover 13. When 15 is formed by being crimped to the contact surface that faces when the tray 3 is fitted, the larger the number, the better. In this case, the optimum value varies depending on the hardness of the material of the tray 3) and the size of the convex portion. In the present embodiment, since the material of the tray 3 is a resin material such as modified PPE, ABS, PC, ABS + PC, PBT, and the material of the tray cover 13 is an aluminum alloy or a magnesium alloy, the convex portion 15 is spiral. In consideration of the formation of the recesses 17 while being crushed somewhat by the fixing force, the four holes are arranged at equal intervals with respect to the holes 16 so that the resin material such as an aluminum alloy or a magnesium alloy is good. The tray 3 and the tray cover 13 are fitted to each other through a hole 16 provided with a convex portion 15 in an adjacent portion, and fixed by a fixing means such as a spiral. By doing so, it is possible to efficiently and easily apply a force to the convex portion provided on the tray cover 3, and the tray 3 and the tray cover 13 can be firmly fixed.

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

  FIG. 10 is a plan view showing a part of a tray cover of a conventional optical disc apparatus. FIG. 11 is a cross-sectional view showing a part of a tray cover of a conventional optical disc apparatus, and is a cross-sectional view taken along the line AA of FIG. 10 and 11, 3 is a tray, 13 is a tray cover, 14 is a spiral, and 16 is a 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 FIGS. As shown in FIG. 11, the warp of the tray 3 and the tray cover 13 at a level that hinders practical use does not occur. 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 part such as by the above, and the center of the main plane part of the tray 3 is held in a state of being largely warped to the lower housing part 2b side. This makes it difficult to store the tray 3 in the housing.

  However, in the embodiment of the present invention shown in FIGS. 3 and 4, the protrusion 3 of the locking means is provided on at least a part of the portion where the tray 3 and the tray cover 13 come into contact with each other. When the spiral 14 crimps the tray 3 and the tray cover 13 on the contact surface between the tray cover 13 and the tray cover 13, the convex portion 15 provided on the tray cover 13 bites in while forming the concave portion 17 on the opposing surface of the tray 3, The fixing force between the tray 3 and the tray cover 13 is increased.

  Therefore, even if a technique such as using a lightweight material such as an aluminum alloy or a magnesium alloy or reducing the thickness of the tray cover 13 is used for the tray cover 13 that is necessary for reducing the weight, the optical disc apparatus can be used. The tray 3 is caused by a fitting displacement between the tray 3 and the tray cover 13 generated when an external load is applied to the disc mounting portion 7a of one disc or when an impact is applied to the tray 3 in the disc mounting direction. The tray cover 13 can be prevented from being deformed, and the tray 3 can be prevented from being difficult to be accommodated in the housing.

In the present embodiment, an aluminum alloy or a magnesium alloy is used as the constituent material of the tray cover 13, and the convex portion 15 is formed by pressing or the like so that the tray 3 side of the tray cover 13 becomes a convex surface. Is about 0.5 mm square with a height of about 0.05 to 0.2 mm, is provided on the tray cover 13, is adjacent to the peripheral edge of the fixing hole 16 with the tray 3, and is about the center of the fixing hole. Although four locations are provided at 90 ° intervals, the constituent material of the tray cover 13 is not limited to aluminum alloy or magnesium alloy, and the convex portion 15 provided on the tray cover 13 may be provided on the tray 3. The tray cover 13 and the tray 3 may be provided. The convex portion 15 provided on the tray cover 13 is formed by being crimped to the contact surface facing when the tray 3 is fixed to the tray 3, and when it is provided only on one side in consideration of cost, the hardness of the material is higher than that of the tray 3. Is provided in the tray cover 13 having a large size from the viewpoint of biting of the contact surface between the tray 3 and the tray cover 13.

  In addition, the height and size of the convex portion 15, the place, number, and shape of the convex portion 15 are provided with the material and thickness of the tray 3, the material and thickness of the tray cover 13, and the force point portion of the spiral 14. Since the optimum value varies depending on the diameter of the head, the height and size of the convex portion 15 and the location, number, and shape of the convex portion 15 are not limited to those in the present embodiment.

  FIG. 5 is a diagram showing an example of a convex portion in an embodiment of the present invention. FIG. 5 (a) shows a spiral relationship between the tray, the tray cover, and the fitting portion with the tray 3 as a lower housing. It is the figure seen from the body part 2b side. FIG. 5B is a cross-sectional view showing a fitting portion between the tray cover and the tray of the optical disc apparatus according to the embodiment of the present invention, and is a cross-sectional view taken along the line AA in FIG. It is a figure when a body part is turned up. In FIG. 5, 13 is a tray cover, 14 is a spiral, 15 is a protrusion, and 16 is a hole. For example, as shown in FIG. 5, the place where the convex portion 15 is provided may not be a portion adjacent to the peripheral portion of the fixing hole 16 but a portion slightly away from the fixing hole 16.

  The place where the convex portion 15 is provided is adjacent to the peripheral edge of the hole 16 for fixing the tray cover 13 to the tray 3, and the material of the convex portion 15 is greater than the hardness of the aluminum alloy or magnesium alloy used in this embodiment. Since the number of protrusions 15 can be further increased and a smaller spiral 14 can be used, it is possible to contribute to making the optical disc apparatus thinner and lighter.

  Furthermore, the fixing means for the tray 3 and the tray cover 13 is not limited to the spiral 14 but may be another fixing means such as caulking. The place where the locking means is provided may be provided in at least one of the fixing portions of the tray 3 and the tray cover 13 shown in FIG. In order to exert the maximum effect, it is preferable to provide it in all the fixing portions of the tray 3 and the tray cover 13.

  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 of the optical disk apparatus in one embodiment of this invention Sectional drawing which shows fitting of the tray cover and tray of the optical disk apparatus in one embodiment of this invention The figure which shows an example of the convex part shape 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. A plan view showing a part of a tray cover of a conventional optical disc apparatus Sectional drawing which shows a part of tray cover of the conventional optical disk apparatus

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 (PUM)
5 rail 6 rail holding portion 7 spindle motor 7a disk mounting portion 8 metal cover 8a opening 9 carriage 10 bezel 11 eject button 12 optical pickup 13 tray cover 14 spiral 15 convex portion 16 hole 17 concave portion

Claims (9)

At least a housing, a tray provided in the housing so as to be housed or pulled out, a rotation driving means provided in the tray, an optical pickup provided in the tray, and a tray cover provided in the tray An optical disc apparatus comprising: a locking means at least at a part of a portion where the tray and the tray cover are in contact with each other. The optical disk apparatus according to claim 1, wherein the locking means includes a tray cover having a convex portion and a tray having a concave portion, and the convex portion and the concave portion being locked. 2. The optical disk apparatus according to claim 1, wherein the locking means includes a tray cover having a concave portion and a tray having a convex portion, and the convex portion and the concave portion being locked. The optical disk apparatus according to any one of claims 1 to 3, wherein the locking means is provided in a portion adjacent to a peripheral edge of a fixing hole of the tray and the tray cover. The optical disk apparatus according to any one of claims 1 to 4, wherein a portion where the tray and the tray cover come into contact with each other is fixed by fixing means. 6. The optical disc apparatus according to claim 5, wherein the fixing means is a spiral, and the fixing portion is configured to sandwich the convex portion and the concave portion between the spiral and the tray. A case, a tray provided in the case so as to be housed or pulled out, a rotation driving means provided in the tray, an optical pickup provided in the tray, and a tray cover provided in the tray. An optical disk apparatus provided with a means for fixing a concave portion formed by pressing a convex portion on the tray cover and a convex portion provided on the tray cover on the tray. An optical disk apparatus, comprising: a portion adjacent to a peripheral edge of the hole for use; and the engaging means being sandwiched between a spiral and a tray, wherein the tray and the tray cover are fixed by the spiral. The optical disk apparatus according to any one of claims 1 to 3, wherein the recess of the locking means is prepared in advance in at least one of the tray and the tray cover before the tray and the tray cover are fixed. Manufacturing method. 9. The method of manufacturing an optical disk device according to claim 1, wherein the concave portion of the locking means is formed by pressure-bonding a convex portion of the locking means.

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