JP2006134556A - Optical disk apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk apparatus capable of realizing a weight reduction. <P>SOLUTION: This optical disk apparatus is at least equipped with: a cover 22; a tray 2 disposed so as to be freely inserted into or pulled out from the cover 22; a pickup module 49 on which an optical apparatus is mounted, while being arranged in the tray 2; and a pickup cover 50 prepared on the pickup module 49, and a projecting section 301 is arranged on a main planar section of the pickup cover 50. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an optical disc apparatus that is suitably used for portable electronic devices such as stationary electronic devices such as personal computers, notebook personal computers, portable information terminal devices, and portable video devices.

  89 to 97 are diagrams showing conventional optical disc apparatuses, respectively. 89 to 96, reference numeral 1 denotes a cover. The cover 1 includes an upper cover 1a and a lower cover 1b, and the cover 1 has a bag-like configuration having an opening 1c at one end. A tray 2 is held in the cover 1 so that it can be inserted and removed. The tray 2 is made of a lightweight material such as a resin material. The tray 2 is provided with a bezel 3 at the front portion. The bezel 3 closes the opening 1 c when the tray 2 is stored in the cover 1. An eject button 4 is exposed on the bezel 3, and when the eject button 4 is pressed, the tray 2 slightly protrudes from the cover 1 by a mechanism (not shown), and the tray 2 can be taken in and out of the cover 1. State.

  The tray 2 is provided with an opening 5, and is attached to the tray 2 so that the surface of the pickup module 6 is exposed from the opening 5. The pickup module 6 is provided with a spindle motor 7 for rotating the optical disk 9, and further, a carriage 8 that moves toward and away from the spindle motor 7 is movably provided. Although not shown, the carriage 8 is equipped with an optical device that records information on the optical disk 9 by irradiating the optical disk 9 with light or reproduces information by reflected light from the optical disk 9. Yes.

  10 is a pickup cover provided on the side of the pickup module 6 on which the optical disk 9 is mounted, 11 is a motor serving as a drive source for moving the carriage 8, and 12 and 13 are engaged with both sides of the tray 2. On the other hand, rails 14 and 15 that are movably locked within a predetermined range are rail guides fixed to the lower cover 1b. The rail guides 14 and 15 are made of a resin material or the like, and are integrated with the lower cover 1b. It is latched by the rail guide fixing part 16 formed in this. Also, the lower cover 1b is integrally provided with a locking claw 17 so that the key-shaped portion provided at the rear end of the rail 12 and the locking claw 17 do not touch the rail 12 so that the rail 12 does not protrude beyond a predetermined amount. Touch. In addition, although the part equivalent to the latching claw 17 is integrally provided in the lower cover 1b also toward the rail 13, it is not illustrated. Reference numeral 18 denotes a control board attached to the rear end of the lower cover 1b, and various electronic components such as integrated circuits 19 and 20 are mounted on the control board 18. Further, when the tray 2 is stored in the cover 1, a part of the control board 18 and a part of the tray 2 overlap each other.

  Reference numeral 21 denotes a flexible printed circuit board. The printed circuit board 21 electrically connects the control board 18 and the tray 2, and supplies drive power to the spindle motor 7 and the carriage 8, and the spindle motor 7 and the carriage 8. Various signals for transmitting the control signal or for controlling the optical device mounted on the carriage 8 are transmitted bidirectionally.

  93, 95, and 96, the spindle motor 7 is fixed to the pickup module 6 with a spindle motor frame 70, a stator 71 fixed to the spindle motor frame 70, and a stator 71 so as to be rotatable. Rotor 72. The rotor 72 holds the optical disk 9 and rotates together with the optical disk 9. The holding mechanism for holding the optical disk is within a diameter φ15 mm from the rotation center of the rotor 72. The holding mechanism may be provided with three claw portions made of resin, or may be attracted by a magnet.

  Further, the rotational speed of the optical disk 9 is 5400 rpm at the maximum in the case of CD 24 times speed. This rotational speed is about 40 km / h at the outermost peripheral part of the optical disk 9 having a diameter of 120 mm when converted into linear velocity. For this reason, if it arrange | positions so that the space | interval of the upper cover 1a and the optical disk 9 may be set to about 1 mm, a negative pressure will generate | occur | produce between the optical disk 9 and the upper cover 1a. If the rigidity of the upper cover 1a is weak, this negative pressure becomes a suction force, and the phenomenon that the upper cover 1a is recessed occurs. As shown in FIG. 94, a concave shape having a maximum displacement occurs at the periphery of the spindle motor 7 that is the rotation center of the optical disc 9 and at the position from the rotation center to the tray insertion / removal direction. Next, a description will be given focusing on the periphery of the spindle motor 7 where the large displacement occurs.

  FIGS. 95 and 96 are partial side sectional views showing a conventional optical disk device, in which FIG. 95 shows a state in which the optical disk 9 is not rotated, and FIG. 96 shows that the optical disk 9 is rotated, and the optical disk 9 and the upper cover 1a. A state in which a negative pressure is generated between is shown. When a negative pressure is generated between the optical disk 9 and the upper cover 1a, the periphery of the spindle motor 7 is most concave, so that when the displacement of the upper cover 1a increases, the upper surface of the rotor 72 of the spindle motor 7 that rotates the optical disk 9 The upper cover 1a or the nameplate attached to the upper cover 1a comes into contact. In that case, it is also conceivable that sound is generated due to contact between the nameplate and the rotor 72 of the spindle motor 7, and in some cases, the rotational speed of the optical disk 9 drops and fluctuates.

  A tray cover 2 a is provided on the lower cover 1 b side of the tray 2. The pickup cover 10 has a substantially bag-like configuration in combination with the tray 2 and the tray cover 2a, and is fixed to each other using a locking means and a spiral (not shown), and is disposed inside the substantially bag-like shape. The components of the pickup module 6 are protected.

  FIG. 97 is a partial side sectional view showing a conventional optical disk apparatus. In FIG. 97, 7 is a spindle motor, 8 is a carriage, 9 is an optical disk, 10 is a pickup cover, 58 is a pickup frame, and 202 is a spiral. Since the pickup cover 10 is also affected by the negative pressure described above, if the rigidity of the main plane portion of the pickup cover 10 is weak, contact between the pickup cover 10 and the optical disk 9 occurs as shown by a broken line portion A in FIG. In some cases, the rotational speed of the optical disk 9 is reduced.

As a prior example, there are (Patent Document 1) and (Patent Document 2).
JP 2001-307460 A JP 2003-151199 A

  However, the optical disk devices described in the conventional technology and each patent document only have a weight exceeding 140 g.

  Further reduction in weight is desired for electronic devices such as notebook personal computers, and further reduction in weight is also demanded for optical disk devices in response to requests for weight reduction of electronic devices.

  As described above, it is necessary to further reduce the weight of the optical disk apparatus having a weight exceeding 140 g. However, in an optical disk apparatus effective for various types of optical disks, it is not easy to reduce the number of parts. Further, the cover 1 supporting each member, the pickup module 6 mounted on the tray 2, and the like are made of a metal material in order to ensure strength. Therefore, it is conceivable to reduce the weight by using a lightweight material for these materials, but there is a possibility that a problem of strength may occur due to the weight reduction. By simply changing the material of each member, other characteristics, that is, the member Recording / reproduction characteristics and the like deteriorate due to problems of twisting and strength.

  The present invention solves the above-described conventional problems, and an object thereof is to provide an optical disc apparatus capable of realizing weight reduction.

  The present invention has been made to solve the above-described problems, and includes at least a cover, a tray provided in the cover so as to be housed or pulled out, a pickup module provided on the tray and mounted with an optical device, and a pickup. And a pickup cover provided on the module, wherein at least one of a concave portion or a convex portion is provided on a main flat portion of the pickup cover.

  According to the present invention, by providing at least one of the concave portion or the convex portion on the main plane portion of the pickup cover with the above configuration, the rigidity of the pickup cover main plane portion can be increased, and due to the influence of negative pressure at the time of rotating the optical disk, etc. Deflection occurring in the main plane portion of the pickup cover can be reduced.

  This makes it possible to reduce the deflection of the main flat surface of the pickup cover, even if the component material is thin or thin or lightweight, which uses lightweight materials. It is possible to provide an optical disc apparatus capable of performing the above.

  The invention described in claim 1 includes at least a cover, a tray provided in the cover so as to be housed or pulled out, a pickup module provided with the optical device provided in the tray, and a pickup cover provided in the pickup module. The pickup cover is provided with at least one of a concave portion and a convex portion on the main flat surface portion. By providing at least one of the concave portion or the convex portion on the main plane portion of the pickup cover, the rigidity of the main surface portion of the pickup cover can be increased, and the main plane portion of the pickup cover due to the influence of negative pressure or the like when the optical disk rotates The generated deflection can be reduced. Therefore, it is possible to reduce the deflection generated in the main flat part of the pickup cover even if the component material is thin or thin or lightweight using a lightweight material. It is possible to provide an optical disc device capable of performing the above.

  The invention described in claim 2 is characterized in that a convex portion is provided on at least a part of the main plane portion of the pickup cover. Protrusion is provided on at least a part of the main flat surface of the pickup cover to increase the rigidity of the main flat surface of the pick-up cover, which occurs in the main flat surface of the pick-up cover due to negative pressure during rotation of the optical disk. It is possible to reduce the deflection.

  The invention described in claim 3 is characterized in that another member is attached to at least a part of the main plane portion of the pickup cover. By attaching a separate member to at least a part of the main flat surface of the pickup cover, the rigidity of the main flat surface of the pick-up cover can be increased, and it occurs in the main flat surface of the pick-up cover due to the negative pressure when rotating the optical disk. It is possible to reduce the deflection.

  According to a fourth aspect of the present invention, the pickup frame constituting the pickup module includes an inner part provided inside the pickup frame, a standing part integrally provided in the inner part, and a single part in the standing part. An outer portion provided outside the pickup frame provided; and a fixing portion provided on the outer portion and serving as an attachment portion to another member, and at least a main plane portion of the pickup cover coupled to the pickup frame It is characterized in that a convex part is provided in part. Protrusion is provided on at least a part of the main flat surface of the pickup cover to increase the rigidity of the main flat surface of the pick-up cover, which occurs in the main flat surface of the pick-up cover due to negative pressure during rotation of the optical disk. It is possible to reduce the deflection.

  The invention according to claim 5 is characterized in that the convex portion provided on the main flat surface portion of the pickup cover is on the upper cover side constituting the cover. Since the convex part provided on the main flat surface of the pickup cover is on the upper cover side constituting the cover, the negative pressure during rotation of the optical disk can be reduced without reducing the tolerance of the distance between the pickup cover and the carriage. It is possible to effectively suppress the deflection generated in the main plane portion of the pickup cover due to the influence, and it is possible to ensure a balanced distance margin for both the optical disk and the carriage when the optical disk is mounted.

  According to the sixth aspect of the present invention, the convex portion provided on the main plane portion of the pickup cover has an elongated shape in a direction parallel to the main plane portion of the pickup cover, and the minor axis direction is the radial direction of the optical disc when the optical disc is loaded. And substantially parallel to each other. The convex portion provided on the main plane portion of the pickup cover has an elongated shape in a direction parallel to the main plane portion of the pickup cover, and the short axis direction is substantially parallel to the radial direction of the optical disc when the optical disc is mounted. The convex portions can be arranged at high density in the direction in which the strength of the main flat surface portion of the pickup cover is desired to be increased.

  The invention described in claim 7 is characterized in that the pickup module has a spindle motor, and the convex portion provided on the main plane portion of the pickup cover is in the vicinity of the spindle motor. The pickup module has a spindle motor, and the convex portion provided on the main plane portion of the pickup cover is in the vicinity of the spindle motor, whereby the convex portion provided on the main plane portion of the pickup cover with respect to the warp of the optical disc and the optical disc It is possible to secure a sufficient distance margin.

  According to the eighth aspect of the present invention, the pickup frame constituting the pickup module includes an inner part provided inside the pickup frame, a standing part integrally provided in the inner part, and a single part in the standing part. At least one of the main plane portions of the pickup cover, which is provided with an outer portion provided outside the provided pickup frame and a fixing portion provided on the outer portion and serving as a mounting portion to another member, and is coupled to the pickup frame. A separate member is attached to the part. By attaching a separate member to at least a part of the main flat surface of the pickup cover, the rigidity of the main flat surface of the pick-up cover can be increased, and it occurs in the main flat surface of the pick-up cover due to the negative pressure when rotating the optical disk. It is possible to reduce the deflection.

  The invention according to claim 9 is characterized in that the separate member attached to the main plane portion of the pickup cover is on the upper cover side constituting the cover. Another member attached to the main flat surface of the pickup cover is on the upper cover side that constitutes the cover, so that the tolerance of the distance between the pickup cover and the carriage is reduced, and the negative pressure during rotation of the optical disk is reduced. It is possible to effectively suppress the deflection generated in the main plane portion of the pickup cover due to the influence, and it is possible to ensure a balanced distance margin for both the optical disk and the carriage when the optical disk is mounted.

  According to the tenth aspect of the present invention, the separate member attached to the main plane portion of the pickup cover has an elongated shape in a direction parallel to the main plane portion of the pickup cover, and the short axis direction is the radial direction of the optical disc when the optical disc is loaded. And substantially parallel to each other. The separate member attached to the main plane part of the pickup cover has an elongated shape in a direction parallel to the main plane part of the pickup cover, and the minor axis direction is substantially parallel to the radial direction of the optical disk when the optical disk is mounted. Another member can be arranged with high density in the direction in which the strength of the main flat surface portion of the pickup cover is desired to be increased.

  According to an eleventh aspect of the present invention, the pickup module has a spindle motor, and another member attached to the main plane portion of the pickup cover is in the vicinity of the spindle motor. The pickup module has a spindle motor, and the separate member attached to the main plane portion of the pickup cover is in the vicinity of the spindle motor, so that the separate member attached to the main plane portion of the pickup cover with respect to the warp of the optical disc and the optical disc It is possible to secure a sufficient distance margin.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 to 3 are diagrams showing an optical disc apparatus according to Embodiment 1 of the present invention. In addition, the same thing as the code | symbol shown in FIGS. 81-88 is comprised by the same shape, a structure, and material. 1 to 3, reference numeral 22 denotes a cover. The cover 22 is composed of an upper cover 22a and a lower cover 22b using at least one of coupling means such as screws, an adhesive, and a locking member. The cover 22 has an opening 22f and is configured in a bag shape. When the tray 2 is stored in the cover 22, the opening 22 f is closed by the bezel 3. In addition, at least the lower cover 22b (including both cases of the upper cover 22a and the lower cover 22b) of the cover 22 is made of a plate material or a thin plate material containing a lightweight metal material, and is a lightweight metal material. Aluminum, aluminum alloy, magnesium alloy, titanium, titanium alloy and the like are preferably used, and the lower cover 22b is formed by processing a plate made of at least one of these materials. In the first embodiment, aluminum or an aluminum alloy is used particularly in consideration of cost and characteristics. In another embodiment, a multi-layer structure may be formed by joining plate members made of the light metal material. For example, an aluminum thin plate and an aluminum alloy thin plate may be joined to form the lower cover 22b, or a plurality of aluminum thin plates and a thin plate mainly composed of another metal material may be laminated. . Moreover, you may use the composite lightweight board which affixed the thin board comprised by nickel or a nickel alloy on both the main surfaces of a resin sheet or a resin board. Further, it is preferable that at least the thickness of the lower cover 22b is 0.15 mm to 0.5 mm, and if it is thinner than 0.15 mm, the mechanical strength is extremely lowered, and there is a possibility that a malfunction occurs. If it is thicker than 5 mm, it is difficult to reduce the weight.

  As shown in FIGS. 1 and 2, the lower cover 22b is provided with convex ribs 22c and ribs 22e protruding outward from the apparatus, and the ribs 22c and 22e are provided as shown in FIG. On the inside, concave ribs 22c and 22e are formed. Further, as shown in FIG. 2, the convex rib 22d protruding inward in the apparatus is a concave rib 22d outside the apparatus as shown in FIG. Such uneven ribs 22c, 22d, and 22e can be easily formed on the lower cover 22b by, for example, pressing. The ribs 22c and 22e are preferably provided in a portion that comes into contact with another member provided outside the optical disk device or a portion that is attached to another member, and the rib 22d comes into contact with another member. It is preferable to be provided excluding the portion to be attached.

  Further, in the present embodiment, the cover 22 is provided with a wing portion 22g located at the end portion of the cover 22 and having a narrower gap than other portions, and the wing portion 22g has a step at the end portion of the lower cover 22b. It is configured by providing. In the lower cover 22b, four ribs 22c are provided from the wing portion 22g side toward the center line of the lower cover 22b, and the four ribs 22c are configured to gradually become longer toward the opening 22f. One rib 22c is provided at the rear end portion of the lower cover 22b, and is provided in the width direction of the lower cover 22b, that is, in the width direction perpendicular to the direction in which the tray 2 enters and exits, preferably the lower cover 22b. It is provided so as to reach both ends perpendicular to the width direction. Moreover, the rib 22c provided at the rear end portion is provided such that the width in the insertion direction of the optical disc 9 is narrower on the side opposite to the wing portion 22g side. Further, three ribs 22c are provided on the side opposite to the wing portion 22g side. Note that the number and shape of the ribs 22c, 22d, and 22e can be arbitrarily selected, and are appropriately selected according to specifications, desired strength of the lower cover 22b, and the like.

  Further, the rib 22c is provided between the rib 22c group provided on the wing 22g and the rib 22c provided on the opposite side of the wing 22g, and the rib 22c is provided on the opening 22f side of the rib 22c at the rear end of the lower cover 22b. 22e is provided, and the rib 22e is surrounded by the rib 22c on three sides except for the opening 22f side.

  As described above, even when the lower cover 22b is formed of a thin plate material having a relatively low mechanical strength by providing the ribs 22c, 22d, and 22e on the lighter lower cover 22b, the machine of the lower cover 22b The mechanical strength can be improved, and the mechanical strength equivalent to that of the lower cover 22b made of a conventional thick iron material can be obtained. Therefore, even when the rail guides 14 and 15 and the control board 18 are fixed to the lower cover 22b with screws or the like, the lower cover 22b is hardly twisted or deformed.

  In the case of the present embodiment, the rib 22e is particularly similar to the shape of a part of the printed board 21, and the printed board 21 can enter. That is, the rib 22e is formed in a concave shape inside the lower cover 22b, and by storing a part of the printed board 21 in the rib 22e, the rib 22e is placed between the tray 2 and the printed board 21 as shown in FIG. Can be effectively opened, the printed circuit board 21 and the tray 2 can be prevented from rubbing, and the printed circuit board 21 can be prevented from being damaged.

  Further, as shown in FIG. 2, for example, the step H between the rib 22c and the rib 22d is set to satisfy H = (0.2 to 4.0) × t where t is the average thickness of the lower cover 22b. Better to do. If the step H is smaller than 0.2 × t, it is difficult to obtain good mechanical strength of the lower cover 22b. If it is larger than 4.0 × t, the lower cover 22b may be damaged or thin. There is a possibility that problems such as failure to realize the system can occur. The thickness t is an average thickness of at least 10 places of the thickness of the flat portion of the lower cover 22b.

  Further, if the lower cover 22b is made of a relatively thin and lightweight material as described above, the mechanical strength of each part also decreases, so that the rail guides 14 and 15 are fixed to the lower cover 22b as shown in FIG. Since the rail guide fixing claw 23 provided on the rail guide fixing claw 23 is also provided with uneven ribs 23a and 23b, the mechanical strength of the rail guide fixing claw 23 can be increased. In other words, if the ribs 23 a and 23 b are not provided, the protrusions (not shown) provided on the rails 12 and 13 may be inserted into the through holes 23 c provided on the rail guide fixing claws 23 and fixed. Sufficient rigidity can be given to the rail guide fixing claw 23, the rail guides 14 and 15 can be securely attached to the lower cover 22b, and the rail guides 14 and 15 can be prevented from falling off. A plurality (2 to 4) of rail guide fixing claws 23 are provided on each of the left and right sides, but it is preferable to provide at least one of the right and left ribs 23a and 23b. The rail guide fixing claw 23 is provided integrally with the lower cover 22b, and the rail guide fixing claw 23 is formed by cutting and raising the lower cover 22b.

  Further, as shown in FIG. 6, the rail locking claw 24 that locks the key-shaped portion at the rear end of the rails 12 and 13 is lowered so that the rails 12 and 13 do not jump out of the cover 22 more than a predetermined amount. The rail locking claw 24 is provided integrally with the cover 22b, and is formed by cutting and raising the lower cover 22b. A configuration in which a narrowed portion 24a having a step with a predetermined inclination and a locking portion 24b having a narrower width than the narrowed portion 24a are integrally provided at the base portion of the rail locking claw 24 by drawing or the like. It has become. With such a configuration, even if the lower cover 22b is made of a thin and lightweight material, the base portion of the rail locking claw 24 is subjected to drawing processing, and the drawing portion 24a has a sloped step. Therefore, the mechanical strength and rigidity of the rail locking claw 24 can be increased.

  In the above embodiment, the lower cover 22b itself is provided with concave and convex ribs 22c, 22d, and 22e to increase the rigidity and strength of the lower cover 22b. However, the configuration shown in FIG. good.

  That is, as shown in FIG. 7, the lower cover 22b is composed of at least two plates. Specifically, the lower cover 22b is provided with a frame portion 25, and through holes 25a and 25b having a relatively large area are provided in the frame portion 25, and covering members 26 and 27 are provided so as to close the through holes 25a and 25b. The frame portion 25 and the covering members 26 and 27 are joined to each other. The through hole 25a is provided in the main surface portion of the lower cover 22b, and the through hole 25b is provided in the wing portion 22g of the lower cover 22b. By using a relatively light plate material for the covering members 26 and 27, the weight of the lower cover 22b can be reduced, and the frame portion 25 is made of a material having a relatively high strength and high rigidity. Strength can be improved. That is, the lower cover 22b having a light weight and high mechanical strength can be configured. For example, the frame portion 25 is made of aluminum, aluminum alloy, iron, iron alloy, titanium, titanium alloy or the like having a relatively high strength, and the covering members 26 and 27 are made of a relatively light magnesium alloy, thereby improving the overall strength. The lower cover 22b which is not dropped and is lightweight can be obtained. Further, it is preferable that the through holes 25a and 25b are provided not individually but separately. That is, when the through holes 25a and 25b are continuously provided, the through holes are also provided in the portion bent along the thickness direction provided between the wing portion 22g and the main surface portion, and the frame There is a possibility that the entire portion 25 is weak against twisting and the like. Further, the frame portion 25 and the covering members 26 and 27 are made of the same material, and the covering members 26 and 27 are formed thinner than the frame portion 25, so that the weight can be reduced. In this case, since the covering members 26 and 27 and the frame portion 25 are made of the same kind of material, the mutual joining becomes easy. The covering members 26 and 27 may be made of different lightweight materials. That is, since the covering member 26 of the main surface portion is provided at a portion where each member is joined, it is necessary to relatively increase the rigidity. The covering member 26 is formed of a plate material having relatively high rigidity and strength, and the covering member 27 can select the material aiming at weight reduction.

  Further, as shown in FIG. 8, a configuration may be adopted in which the covering member 26 is provided in the through hole 25a provided in the main surface portion of the lower cover 22b, and the covering member 27 is not provided in the through hole 25b provided in the wing portion 22g. . That is, a part of the optical disk can be seen from the back side of the wing portion 22g of the apparatus. With such a configuration, by providing the covering member 26 in the main surface portion where relatively high strength and rigidity are required in the same manner as described above, the strength and rigidity can be increased in the main surface portion to which a number of members are attached, And since only the through-hole 25b is provided in the wing part 22g, further weight reduction is realizable.

  Moreover, as shown in FIG. 9, the structure which provides not only the through-hole 25b in the wing part 22g but provides only the through-hole 25a in the main surface part, and provides the covering member 26 in the through-hole 25a may be sufficient.

  Further, as shown in FIG. 10, through holes 25c and 25d may be separately provided in the main surface portion of the lower cover 22b, and the covering members 28 and 29 covering the through holes 25c and 25d may be attached. With such a configuration, the connecting portion 25e, which is a part of the frame portion 25, is provided between the through holes 25c and 25d, whereby the rigidity and mechanical strength of the main surface portion can be improved. Thus, by providing the connecting portion 25e along the insertion / extraction direction of the optical disc 9 as a part of the frame portion 25 having relatively high strength and rigidity, the strength of the main surface portion can be improved. The connecting portion 25e may be provided in a direction substantially perpendicular to the insertion / extraction direction of the optical disc 9.

  Moreover, as shown in FIG. 11, it is good also as a structure which provides the through-holes 25f-25i separately in the main surface part of the lower cover 22b separately, respectively, and attaches the covering members 30-33 which cover the through-holes 25f-25i. With such a configuration, the connecting portions 25j and 25k, which are part of the frame portion 25, are provided in a cross shape between the through holes, whereby the rigidity and mechanical strength of the main surface portion can be improved. Thus, by providing the connecting portions 25j and 25k in a cross shape as a part of the frame portion 25 having relatively high strength and rigidity, the strength and rigidity of the main surface portion can be further improved.

  In addition, it is preferable that the area which provides each said covering member with respect to the projection area of the lower cover 22b shall be 0.2-0.85. That is, assuming that the projected area of the lower cover 22b is 1, if the formation area of each of the covering members is smaller than 0.2, the weight reduction does not progress much, and if it exceeds 0.85, the portion where the frame portion 25 exists. May become too small and the strength against twisting may be weakened.

  In the embodiment configured as described above, it is possible to partially reduce the weight while maintaining the mechanical strength of the lower cover 22b to some extent.

  Next, the method for joining the frame portion and the covering member described in the above embodiment will be described with examples.

  As shown in FIG. 12 (a), a plurality of stepped portions 26b are provided in the peripheral portion of the covering member 26 or over the entire periphery, and a plurality of through holes 26a are provided in the stepped portion 26b. In the present embodiment, the through-hole 26a is provided with a large-diameter portion that gradually decreases in diameter and a small-diameter portion having a constant diameter connected to the large-diameter portion. Furthermore, in the present embodiment, the thickness of the stepped portion 26 b is configured to be about half of the thickness of the plate material constituting the covering member 26.

  In addition, a plurality of stepped portions 25m are provided on the peripheral portion of the frame portion 25 over the entire periphery or a plurality of protruding portions 251 are provided on the stepped portion 25m. The projecting portion 25l has a columnar shape with a constant diameter, and the top portion is configured to be slightly higher than the depth of the stepped portion 25m. Further, in the present embodiment, the thickness of the stepped portion 25m is configured to be about half of the thickness of the plate material constituting the frame portion 25.

  Further, the width of the stepped portions 25m and 26b is preferably 0.8 mm to 1.2 mm. When the thickness is 1.2 mm or more, when stepping is performed by press molding, the distortion of the member increases. If the thickness is 0.8 mm or less, it is difficult to form the protrusions 25l.

  As shown in FIG. 12 (b), the protruding portion 25l is inserted into the through hole 26a and subjected to caulking with a press or the like, whereby the collapsed portion of the protruding portion 25l is accommodated in the large diameter portion of the through hole 26a. The frame part 25 and the covering member 26 are firmly fixed. At this time, the gap 34 can be provided by setting the width dimension when the stepped portions 25m and 26b are provided to have a predetermined relationship, and distortion caused by caulking can be alleviated by the gap 34. . The gap 34 need not be provided depending on the specifications.

  In terms of function, the flatness after bonding is preferably 0.1 mm or less, and the unevenness H (FIG. 12) of the crimped portion is preferably 0.05 mm or less. If the flatness is 0.1 mm or more, or H = 0.05 mm or more, there is no clearance from the tray and an obstacle to flexibility of the flexible printed board.

  Further, FIG. 13 shows the lower cover 22b when the above-described caulking method is adopted. As shown in FIG. 13, the covering member 26 and the frame portion 25 are firmly fixed by caulking at specific intervals. However, at least one side may be provided on each side, or the corner portion of the covering member 26 may be provided. Four locations may be provided.

  In the present embodiment, the protrusion 25l is provided in the frame 25 and the through hole 26a is provided in the covering member 26. However, the through hole 26a may be provided in the frame 25 and the protrusion may be provided in the covering member 26. good.

  Further, in the present embodiment, the thickness is about half that of the plate material constituting each of the stepped portions 25m and 26b. However, in the case where a step may be slightly generated in the joint portion between the frame portion 25 and the covering member 26, In particular, the thickness of the stepped portions 25m and 26b need not be half that of the plate material.

  It is preferable to distribute the thickness so that the strength of the stepped portion is equal to the material strength of the member to be used. The joint strength of the joint must be greater than the proof stress value of each member. That is, it is preferable that the joint portion does not come off before each member is permanently set.

  Furthermore, as another joining method, as shown in FIG. 14, the frame part 25 and the covering member 26 may be joined by interposing an adhesive 35 between the stepped parts 25m and 26b. As the adhesive 35, a UV curable type, an anaerobic curable type, a heat effect type, a water absorption type, or the like is preferably used. Specifically, an acrylic adhesive, an epoxy adhesive, an instantaneous adhesive, or the like is used. In the present embodiment, the stepped portions 25m and 26b are provided on the entire periphery of the peripheral portion of the frame portion 25 and the covering member 26, respectively. The thicknesses of the stepped portions 25m and 26b are preferably distributed in accordance with the material strength of the member so that the strength of the stepped portions is equal to each other. The width is preferably 0.8 mm to 1.2 mm. When the thickness is 1.2 mm or more, when stepping is performed by press molding, the distortion of the member increases. If the thickness is 0.8 mm or less, the bonding area is reduced and the bonding strength is insufficient. Further, in order to obtain electrical contact between the covering member 26 and the frame portion 25, conductive particles or fibrous bodies are mixed in the adhesive 35, or at least one of the stepped portions 25m and 26b. Protruding portions may be provided on the electrodes to make electrical contact via the protruding portions. Alternatively, a member such as a conductive sheet or a bar may be interposed in a part of the facing portion of the stepped portions 25m and 26b and bonded with the adhesive 35.

  Further, as shown in FIG. 15, after the stepped portions 25 m and 26 b are made to face each other without providing the adhesive 35, a part of each of the stepped portions 25 m and 26 b is melted by laser welding or resistance welding. To form a weld 36 and fix them together. In this embodiment, the laser is irradiated from the stepped portion 26b side, but may be irradiated from the stepped portion 25m side. In this way, by joining the frame portion 25 and the covering member 26 using laser welding or resistance welding, no adhesive or the like is required, and it is not necessary to provide the protrusions 25l and the through holes 23c. Etc. can be improved.

  Next, the upper cover 22a will be described.

  Similarly to the lower cover 22b, the upper cover 22a is made of a plate material or a thin plate material containing a light metal material, and aluminum, aluminum alloy, magnesium alloy, titanium, titanium alloy, etc. are preferably used as the light metal material. And is formed by processing a plate made of at least one of these materials. In addition, the thickness of the upper cover 22a is reduced to reduce the weight, and the mechanical strength is also relatively lowered. In order to solve this, as shown in FIGS. 16 and 17, through holes 37 to 40 are provided in a portion of the upper cover 22a facing the outer peripheral portion of the optical disk 9. With this configuration, it is possible to reduce the negative pressure in the cover 22 caused by the high-speed rotation of the optical disk 9, and the upper cover 22a can reduce the dent. That is, the rotation speed of the optical disk 9 is fast at the outer peripheral portion, so that a relatively large negative pressure is likely to be generated. Therefore, as in the present embodiment, by providing the through holes 37 to 40 in the portion of the upper cover 22a facing the outer peripheral portion of the optical disc 9, the negative pressure generated in the optical disc 9 can be reduced, and the recess of the upper cover 22a can be reduced. Suppress. Further, the through hole 41 is provided so as to face the spindle motor 7. In the present embodiment, the through holes 37 to 40 are arranged in a circular shape around the through hole 41.

  Further, it is preferable that the through holes 37 to 40 are arranged in a diameter range of φ90 mm to φ120 mm with the rotation center of the spindle motor 7 as the center. By providing the through holes 37 to 40 in the above range, it is possible to surely suppress the reduction of the negative pressure of the optical disk 9 particularly at high speed rotation. Furthermore, the diameter of the through holes 37 to 40 is preferably in the range of φ1 mm to φ5 mm. By setting the size of the through holes 37 to 40 in this range, the negative pressure can be reduced, and the upper A decrease in the mechanical strength of the cover 22a can be suppressed. That is, when the size (diameter) of the through holes 37 to 40 is smaller than φ1 mm, the effect of reducing the negative pressure is small, and when the size is larger than φ5 mm, the formation area of the through holes 37 to 40 is increased and the strength of the upper cover 22a is reduced. Sometimes.

  As described above, by providing the through holes 37 to 40, even if the upper cover 22a is reduced in weight and mechanical strength and rigidity are reduced to some extent, the upper cover 22a is recessed to contact the optical disc 9 or to other members. Contact can be prevented.

  In the present embodiment, four through holes are provided such as through holes 37 to 40, but three or two may be used. That is, it is preferable to provide a plurality of through holes and arrange them in a circular shape, preferably at a predetermined interval.

  Moreover, although the through holes 37 to 40 are circular holes, they may be quadrangular, triangular or pentagonal or more polygonal, or at least one of the through holes may be another through hole. It may be different from the shape of the hole. In this way, the negative pressure can be optimally reduced by changing the shape of the through-hole or by changing the position of the through-hole (such as the distance from the center of the spindle motor 7).

  Furthermore, in the embodiment shown in FIGS. 16 and 17, the through holes 37 to 40 are simply provided. Therefore, when used in an environment where there is a lot of dust outside the apparatus, dust from the outside passes through the through holes 37 to 40. There is a possibility of intruding inside. Therefore, as shown in FIGS. 18 and 19, a filter member 42 that covers the through holes 37 to 40 is attached to the upper cover 22a. In this way, by providing the filter member 42 that can pass the gas, even if dust tries to enter from the through holes 37 to 40, the dust can be removed by this filter member 42, and the dust can enter into the inside and cause a problem. Can be prevented. Further, in this embodiment, as the filter member 42, an unintelligible cloth, paper, a foamable sheet, a porous sheet or the like is preferably used. Further, by providing the filter member 42 to the upper cover 22a in a relatively wide area by bonding or sticking, it is possible to reinforce the mechanical strength of the upper cover 22a. Or at least one of them can be written, or a symbol or number corresponding to the notation can be written.

  Moreover, in this Embodiment, by providing so that the through-holes 37-40 containing the through-hole 41 may be covered with the filter member 42 of 1 sheet, since each through-hole can be block | closed in one process, productivity. However, at least one of the through holes 37 to 40 can be covered with the filter member 42. Moreover, you may comprise so that the several filter member 42 may be provided and each through-hole 37-40 may be plugged up separately. Further, in the present embodiment, all the through holes 37 to 40 are closed by one filter member 42, and the one filter member 42 is all made of a breathable member. It is suitable for the description except for the part facing the through holes 37 to 40 of the filter member 42 by configuring the part facing the holes 37 to 40 with a breathable member and configuring the other part with a normal label. By using a member, it is possible to make it easy to perform the notation.

  Furthermore, in order to increase the mechanical strength and rigidity of the upper cover 22a, a dome portion 43 may be provided on the upper cover 22a as shown in FIGS. That is, by providing the dome portion 43 that gradually protrudes toward the through hole 41 on the outer side of the device, the dome portion 43 is provided on the inner side of the device even if negative pressure is generated as the optical disk 9 rotates. Therefore, even if a force is applied to the inside of the apparatus, the upper cover 22a is not easily deformed such as being recessed. Also. The formation area of the dome 43 is preferably 50% to 100% with respect to the projected area of the disk having a diameter of 120 mm. If it is less than 50%, it is difficult to give the upper cover 22a a desired rigidity. If it is more than 100%, even if the dome portion 43 is formed in the upper cover 22a, the effect cannot be obtained.

  In addition, a step-like convex portion 44 and a concave portion 45 are provided outside the dome portion 43 on the rear end side to increase the mechanical strength. Similarly, a step-like concave portion is provided on the front end side. By providing 46 and 47, the mechanical strength is increased.

  As shown in FIG. 21, a projecting portion 48 having a square cross section projecting outward is provided between the dome portion 43 and the outer surface of the upper cover 22 a, and by providing the projecting portion 48, the dome portion 43 is temporarily provided. Since the outer end portion of the dome portion is recessed and then gradually protruded outward, it is possible to prevent the height of the top portion of the dome portion 43 (in the vicinity of the through hole 41) from being increased, and a reduction in thickness can be realized. Further, as shown in FIG. 21, the raised height t of the dome portion 43 is preferably 0.2 mm to 1 mm, and if it is lower than 0.2 mm, the rigidity of the dome portion 43 does not become a desired size and is 1 mm. If it is larger, it is difficult to reduce the thickness.

  In the present embodiment, the outline of the dome portion 43 is circular, but it may be rectangular, triangular, elliptical, or a polygonal shape of pentagon or more. Furthermore, although the cross-sectional shape of the protrusion 48 is rectangular, it may be a semicircular shape.

  Further, although the dome portion 43 is provided so as to gradually rise toward the through hole 41 (the center portion of the spindle motor 7), the dome portion 43 may be configured by using a press process or the like so as to rise in a step shape. Naturally, even in the case shown in the embodiment, the dome portion 43 may be configured by press working or the like.

(Embodiment 2)
Next, the weight reduction of the pickup module will be described.

  As shown in FIG. 22, a tray 2 is provided in the cover 22 so as to be freely inserted and removed, and a bezel 3 and an eject button 4 are provided on the tray 2. Reference numeral 49 denotes a pickup module, and a spindle motor 7 and a carriage 8 for rotating the optical disk 9 are movably held in the pickup module 49. A motor 11 generates a driving force for moving the carriage 8, and the motor 11 is provided in the pickup module 49. A light source, various optical components, lenses, and the like are mounted on the carriage 11, and an optical device that performs at least one of information recording and reproduction on the optical disk 9 is mounted.

  A pickup cover 50 is provided so as to cover a portion of the pickup module 49 facing the optical disk 9.

  23 and 24 are a front view and a rear view of the pickup module 49, respectively. The pickup module 49 is configured by mounting each part on a pickup frame 58. The pickup frame 58 has the configuration shown in FIG. It has become.

  The pickup frame 58 is provided with fixing portions 59, 60, 61 serving as attachment portions to the tray 2. The pick-up frame 58 has a flat plate-like inner portion 62 projecting inside, a standing portion 67 provided integrally with the inner portion 62, and a portion provided integrally with the standing portion 67 on the opposite side to the inner portion 62. The outer portion 68 is provided so as to protrude and has a substantially S-shaped cross section. In the present embodiment, in particular, the outer portion 68 is provided, so that the pickup frame 58 is made of a lightweight material such as aluminum, an aluminum alloy, or a magnesium alloy. Even if it is small, the mechanical strength can be structurally increased by providing the outer portion 68 in particular. The inner portion 62 is provided with through holes 63, 64, 65, and the spindle motor 7 is fixed to the pickup frame 58 by inserting screws or the like into the through holes 63 to 65. A through hole 66 is provided in the pickup frame 58, and the carriage 8 and the like are movably held in the through hole 66 as will be described later. Further, another through hole 69 is provided in the inward portion 62 so that the motor 11 is exposed. The outer portion 68 is preferably provided on almost the entire circumference of the pickup frame 58 to improve the mechanical strength and rigidity. However, the outer portion 68 is at least 50% or more of the entire circumference of the pickup frame 58. By providing them continuously or discretely, it is possible to obtain a certain degree of mechanical strength and rigidity.

  The fixing portions 59, 60, 61 are provided integrally with the outer portion 68, and the fixing portions 59, 60, 61 are provided with concave holes 59a, 60a, 61a. Screws, bosses, and the like are inserted into the holes 59a, 60a, and 61a via damper materials and the like, and fixed to the tray 2. Further, on both sides of the fixing portions 59, 60, 61, there are provided basic portions 59b, 60b, 61b which are formed by pressing or the like and have a drawing structure. Note that, for the sake of illustration, both one of the root portions 60b and 61b of the root portion are not shown in FIG. In this way, by providing the root portions 59b, 60b, 61b of the drawing structure on both sides of the fixing portions 59, 60, 61, the mechanical strength of the fixing portions 59, 60, 61 can be increased, and the tray 2 can be increased. When mounting, the pickup frame 58 is less likely to be twisted.

  In the present embodiment, all the root portions 59b, 60b, 61b of the fixing portions 59, 60, 61 employ a diaphragm structure. In the present embodiment, three fixing portions 59, 60, 61 are provided, but at least two fixing portions may be provided, or four or more and eight or less are preferable.

  As shown in FIG. 24, besides the spindle motor 7 being fixed to the pickup frame 58, a drive shaft 51, guide shafts 52, 53, and the like are fixed substantially in parallel. The carriage 8 is held movably, and the drive shaft 51 is engaged with a rack portion 8 a provided on the carriage 8. Although not shown, the drive shaft 51 is provided with a spiral groove, and the rack portion 8a is engaged with the spiral groove, and when a predetermined load or more is applied, the rack portion 8a is helical. It is configured so as to be removed from the groove, preventing damage to the drive shaft.

  The pickup cover 50 has a light and relatively thin structure like other members and is easily deformed. The pickup cover 50 is provided with a through hole 54, from which the side of the carriage 8 facing the objective lens 8 b is exposed and the mounting portion of the optical disk 9 of the spindle motor 7 protrudes. Yes. As described above, since the pickup cover 50 is easily deformed for the purpose of weight reduction, the pickup cover 50 corresponds to the inner end of the pickup cover 50 constituting the through hole 54 as shown in FIG. As the distance from the parallel part 56 parallel to the moving direction and the spindle motor 7 increases, a gap 57 is gradually formed and a corner 57 where the non-parallel part 55 non-parallel to the moving direction of the carriage 8 intersects is provided. That is, by providing the corner portion 57 within the movement range of the carriage 8, the angle of the corner portion 57 can be increased, and the mechanical strength in the vicinity of the corner portion 57 can be increased accordingly. If the corner 57 has a configuration very close to the spindle motor 7 as in the prior art, the corner will inevitably become sharp, and if the vicinity of the corner is mistakenly suppressed by hand or the like, it can be easily deformed. However, as in the present embodiment, by arranging the corner portion 57 within the movable range of the carriage 8, the angle of the corner portion 57 can be increased, and the mechanical strength can be increased accordingly. As shown in FIG. 23, the distance P along the moving direction of the carriage 8 between the corner 57 and the end of the spindle motor 7 is preferably 5 mm to 30 mm. If it is smaller than 5 mm, it is difficult to increase the mechanical strength because the corner 57 is sharp, and if it is larger than 30 mm, the portion covered by the pickup cover 50 becomes narrow, and the effect of a sufficient cover can be obtained. It may not be obtained.

(Embodiment 3)
The distance between the optical disc 9 and the upper cover 22a as shown in FIG. 17 is configured to be about 0.5 mm to 2 mm when the weight is reduced. The optical disk 9 rotates at 5000 RPM or more at high speed. At this time, when the Reynolds number of air in the gap between the optical disk 9 and the upper cover 22a is obtained,
Re = V · L / ν.

Re is the Reynolds number, V is the flow velocity, L is the representative length, and ν is the kinematic viscosity coefficient. The diameter of the optical disk 9 is 12 cm, the rotational speed is 5400 RPM, the representative length is 1/2 of the optical disk 9 and the upper cover 22a, ν is 0.15 [cm ² / sec] as air, and the Reynolds number on the outer periphery of the optical disk 9 Ask for
Re = (12 × π × 5400/60) · (0.025 to 0.1) /0.15
= 565-2262
It is generally known that when the Reynolds number is 3000 or less, the flow becomes laminar. Therefore, in this case, air is moving at high speed in a laminar flow state, and a strong suction force is generated between the optical disc 9 and the upper cover 22a. Further, in order to reduce the suction force, this laminar flow can be changed to a turbulent flow by providing a small concave portion, convex portion or both.

  By the way, the upper cover 22a is made of a plate material or a thin plate material containing a lightweight metal material, and aluminum, aluminum alloy, magnesium alloy, titanium, titanium alloy, etc. are suitably used as the lightweight metal material. It is comprised by processing the board material comprised by at least one of these. In addition, the thickness of the upper cover 22a is reduced to reduce the weight, and the mechanical strength is also relatively lowered. Therefore, in order to reduce the suction force generated by the rotation of the optical disk 9 and improve the strength, as shown in FIG. 26, the upper cover 22a has a ring-shaped recess (or protrusion) concentric with the optical disk 9 as shown in FIG. ).

  A cross-sectional view of the upper cover 22a is shown in FIGS. By providing a ring-shaped concave portion that is substantially concentric with the optical disc 9, it functions as a convex portion (or a concave portion) that generates turbulent flow in the air layer sandwiched between the optical disc and the upper cover 22a, and the ring-shaped shape is planar. In order to improve the rigidity improvement with respect to the dent direction, the dent of the upper cover 22a can be effectively suppressed. In addition, although the ring-shaped recessed part (or convex part) was provided here, it is a polygon shape more than a triangle, or a shape similar to a polygonal shape (in the case of FIG. 29, it is a hexagon, and a corner | angular part is connected by R). Or a continuous combination of an elliptical shape, a spiral shape (FIG. 30), and an arc shape. Furthermore, although the cross-sectional shape of the convex portion (or concave portion) is a square shape (the corner R portion by processing is ignored here), it may be a semicircular shape or the like.

  Further, as shown in FIG. 31, it is obvious that the same effect can be obtained for the purpose of generating a turbulent layer by forming only the convex portion (or concave portion). In this case, the convex portion (or concave portion) may be formed of the same member as the upper cover 22a by pressing, forging, cutting, or the like, but by attaching another member with an adhesive, a crimping method, or the like. It may be configured.

  Furthermore, as shown in FIG. 32, a convex portion (or concave portion) may be provided outside the ring-shaped or polygonal convex portion (or concave portion) described so far in order to further improve the strength. Good.

  Further, since the optical disk apparatus needs to be configured in a bag shape having at least one open position in order to take out the optical disk, the strength of the optical disk take-out portion is lowered in the upper cover 22a. Therefore, as shown in FIG. 33, a convex portion (or a concave portion) may be formed in the take-out portion of the optical disc.

  Furthermore, it is necessary to affix a nameplate indicating the model name, model, precautions, etc. to the optical disc apparatus. Therefore, as shown in FIG. 34 (state where no nameplate is affixed) and FIG. 35 (state where a nameplate is affixed), a convex part is continuously formed by deforming a part of the ring shape according to the outer peripheral shape of the nameplate. You may let them.

  Furthermore, by partially deforming the convex portion (or concave portion) and continuing the convex portion, the degree of improvement in strength due to the convex portion (or concave portion) decreases, so to compensate for this and improve the strength, You may provide the further convex part (or recessed part) in the vicinity which made the convex part continue.

  Further, as shown in FIG. 36, the strength of the upper cover 22a may be improved in combination with radial convex portions (or concave portions).

  Further, although the height difference of the convex part (or concave part) varies depending on the distance between the upper cover 22a and the optical disk 9, for example, when the distance between the upper cover 22a and the optical disk 9 is about 1 mm, 0.1 to 0.2 mm is sufficient. It has been confirmed through experiments that

  Further, in forming the convex portion (or concave portion), the upper cover 22a has a thin plate shape. Therefore, mass production is facilitated by forming the convex portion (or concave portion) using press working. .

  Further, in the above description, the case where it is composed of one kind of lightweight material has been described. However, as shown in FIG. 37, the inner layer material is a lightweight material, and the exterior material is a material having high strength and rigidity. By constituting the member of the sandwich material, the weight can be further reduced without reducing the strength and rigidity of the upper cover 22a. For example, the inner layer can be made of resin, magnesium and a magnesium alloy, and the outer layer can be made of aluminum and an aluminum alloy, titanium and a titanium alloy, nickel and a nickel alloy, iron and an iron alloy.

  As described above, the strength of the upper cover 22a is improved by the convex portion (or concave portion) such as a ring shape, and a turbulent flow is generated in the air layer sandwiched between the optical disc and the upper cover 22a. Even if it is not a ring-shaped shape that improves strength, it is possible to reduce the dent of the upper cover 22a to some extent by providing a convex portion (or a concave portion) of any shape only for the purpose of generating turbulence. It is.

(Embodiment 4)
38 to 48 are diagrams each showing an optical disc device according to Embodiment 4 of the present invention. In addition, the same thing as the code | symbol shown in FIGS. 81-88 is comprised by the same shape, a structure, and material. FIG. 38 is a perspective view showing an optical disc apparatus according to Embodiment 4 of the present invention. In FIG. 38, reference numeral 22 denotes a cover, and the cover 22 is composed of an upper cover 22a and a lower cover 22b using at least one of coupling means such as a screw, an adhesive, and a locking member. The cover 22 has an opening 22f and is configured in a bag shape. As shown in FIG. 38, the opening 22 f is closed by the bezel 3 when the tray 2 is stored in the cover 22. In addition, at least the lower cover 22b (including the case of the upper cover 22a and the lower cover 22b) of the cover 22 is made of a plate material or a thin plate material containing a lightweight metal material. As the lightweight metal material, aluminum, An aluminum alloy, a magnesium alloy, titanium, a titanium alloy, or the like is preferably used, and the lower cover 22b is formed by processing a plate made of at least one of these materials. In the fourth embodiment, aluminum or an aluminum alloy is used in consideration of cost and characteristics. In another embodiment, a multi-layer structure may be formed by joining plate members made of the light metal material. For example, an aluminum thin plate and an aluminum alloy thin plate may be joined to form the lower cover 22b, or a plurality of aluminum thin plates and a thin plate mainly composed of another metal material may be laminated. . Moreover, you may use the composite lightweight board which affixed the thin board comprised by nickel or a nickel alloy on both the main surfaces of a resin sheet or a resin board. Further, it is preferable that at least the thickness of the lower cover 22b is 0.15 mm to 0.5 mm, and if it is thinner than 0.15 mm, the mechanical strength is extremely lowered, and there is a possibility that a malfunction occurs. If it is thicker than 5 mm, it is difficult to reduce the weight.

  39 and 40, a plurality of adjacent holes 22k having the same shape are provided in the vertical wall portion 22j (surface formed by a surface perpendicular to the optical disk) of the lower cover 22b. The rigidity of the lower cover 22b has almost no effect even if the hole is provided if the end of the vertical wall does not become a hole in the vertical wall part 22j. Therefore, by providing a plurality of adjacent holes 22k having the same shape in the vertical wall portion 22j, it is possible to reduce the weight while ensuring rigidity and strength without reducing the thickness of the lower cover 22b. become.

  Next, in FIGS. 41 and 42, a plurality of adjacent holes 22n, 22p, 22q, 22r, and 22s having the same shape are formed in the flat portions 22l and 22m of the lower cover 22b (surfaces that are parallel to the optical disk). Is provided. As for the rigidity of the lower cover 22b, it is clear that the portion closer to the front part 22t without the vertical wall has a larger influence on the rigidity when the hole is provided. Here, in order to take out the optical disc in the optical disc apparatus, it is necessary to pull out the tray 2 as shown in FIG. 43, and the control board 18 that requires a large space is required to pull out the tray in order to open and close the tray 2. It is arranged at a position facing the direction. Since this part is surrounded by vertical walls in three directions and further away from the front part, the degree of reduction in rigidity is small even if a hole is provided. Therefore, even in the flat portion of the lower cover 22b, the hole 22n is formed at a position facing the control board 18, thereby reducing the weight while ensuring rigidity and strength without reducing the thickness of the lower cover 22b. It becomes possible.

  By the way, electromagnetic waves are inevitably generated from the control board 18 and may adversely affect other electronic devices. Further, there is a concern that the electromagnetic wave up to several GHz on the control board of the optical disk apparatus may affect other devices. Generally, the size of the hole is preferably about ¼ or less of the wavelength. For example, when considering the range of about 10 GHz or less, ¼ of the wavelength is 7.5 mm. Therefore, it is preferable that the hole has a diameter of 10 mm or less in the case of a circular shape and a maximum opening length in the case of a non-circular shape.

Next, regarding the aperture ratio, when considering the case where the size of the hole is 10 mm, the weight can be reduced as the distance between the holes is narrowed. When the shape as shown in FIG. 44 is formed using aluminum, an aluminum alloy, a magnesium alloy, titanium, or a titanium alloy, press working is preferable in view of mass productivity. It is preferable that the narrowest part in between is about 1 mm or more. Therefore, in the case of a circular hole, when holes are laid out in a dimensional relationship as shown in FIG. 44, the most holes can be formed most efficiently. The aperture ratio at this time is
[5 × 5 × π ÷ 2] ÷ [11 × 5.5√ (3) ÷ 2] = 39.27 ÷ 52.394≈0.75 = 75%.

  The aperture ratio can be slightly increased by making the hole shape a hexagon or by narrowing the distance between the holes, so that electromagnetic waves do not affect external electronic devices and are the most lightweight. While ensuring the strength and workability of the material, the maximum aperture ratio can be set to about 80%, and an aperture ratio higher than this is not preferable for processing.

  However, in order to further reduce the weight, in order to further increase the maximum opening length, in order to prevent electromagnetic waves from leaking, a sheet material made of a conductive material, a sheet material having a conductive layer, etc. By attaching a sheet material (not shown) to the lower cover 22b so as to close the hole, it is possible to achieve both weight reduction and prevention of electromagnetic wave leakage.

  Further, as shown in FIG. 45, when the tray is pulled out and inserted by providing a step 22u around the hole, it can be prevented from being caught at the end of the hole, and the cover is lowered by making the hole. It is possible to improve the rigidity. For the purpose of preventing the end of the hole from being caught, as shown in FIGS. 46 and 47, it is possible to obtain the same effect by providing the R portion 22v or the C surface portion 22w in the peripheral portion of the hole.

  Further, in the above description, the case where the material is composed of one kind of lightweight material has been described. However, as shown in FIG. 48, the material of the inner layer is a lightweight material, and the exterior material is a material having high strength and rigidity. By comprising the sandwiched material, the weight can be further reduced without lowering the strength and rigidity of the lower cover 22b. For example, the inner layer can be made of resin, magnesium and a magnesium alloy, and the outer layer can be made of aluminum and an aluminum alloy, titanium and a titanium alloy, nickel and a nickel alloy, iron and an iron alloy.

  Moreover, in Embodiment 4, these holes described are through holes. In addition, even if it does not penetrate completely, even if it forms a dent by scraping the cover, the same effect can be expected, but a through hole is preferable.

(Embodiment 5)
49 to 55 are diagrams showing an optical disc device according to Embodiment 5 of the present invention. In addition, the same thing as the code | symbol shown in FIGS. 81-88 is comprised by the same shape, a structure, and material.

  In the optical disk apparatus according to the present embodiment, a plurality of holes 73 are provided on the upper surface and side surfaces of the rotor 72 in a balanced manner such as position and size as shown in FIGS. With this configuration, the spindle motor 7 can be reduced in weight, and an effective hole 73 is provided in the spindle motor 7, so that the heat generated inside the optical disk is utilized by the rotation of the rotor 72 and the heat passing through the hole 73 is reduced. By creating the flow path, thermal diffusion can be performed, and an increase in the heat of the optical disk apparatus can be prevented.

  In the optical disk apparatus according to the present embodiment, a hole 73 is provided in a part of the rotor 72. However, a structure in which a recess (not shown) is provided in a part of the rotor 72 can be similarly implemented. is there.

  Actually, in the optical disk apparatus, there are heat generation sources such as a laser diode driver mounted on the optical pickup and an IC on the circuit board. In particular, in a thin optical disk device, components are densely packed in a narrow space, and heat tends to accumulate inside the optical disk device. Further, in the writing type such as CD-R / RW / DVD-R / RW / DVD-RAM, heat generated by the laser diode is larger than that in the reading type such as DVD-ROM. Therefore, the temperature in the vicinity of the optical pickup reaches 70 ° C. to 80 ° C. particularly in the optical disk device of the type built in the personal computer. Further, in the situation where the main board of the personal computer is arranged or in use in a high temperature environment, the temperature rises by 20 ° C. or more, and the internal temperature of the optical disk apparatus can reach 100 ° C. or more. Such a high temperature state causes the life of the laser diode to be shortened. Further, under such a high temperature condition, the optical disc apparatus cannot be guaranteed normal operation, so the function is forcibly stopped.

  Therefore, in the optical disk apparatus according to the present embodiment, a hole 73 or a recess is provided in the rotor 72 to constitute a flow path through which air passes through the hole 73 or the recess. Usually, since an optical pickup and a circuit board are disposed on the lower surface of the optical disk, heat tends to accumulate on the lower surface of the optical disk, and the temperature tends to increase. If this heat can be diffused inside the optical disc apparatus, the temperature rise can be suppressed.

  In the present embodiment, the rotation of the optical disk rotating with the rotor 72 and the rotor 72 is used for the diffusion of heat. By rotating the rotor 72, the heat of the lower surface of the optical disk is diffused to the upper surface of the optical disk. As the heat flow path, a negative pressure generated by the rotation of the rotor 72 is used. The clearance between the optical disk and the upper cover 22a is about 1 mm, and an area having a diameter of 120 mm from the center of the optical disk is a flat surface. On the other hand, the clearance on the lower surface of the optical disk is large, and the pickup module on the lower surface of the optical disk 9 has an opening. Therefore, when the optical disk rotates, negative pressure is generated on the upper surface side of the optical disk. Due to the action of the negative pressure, as shown in FIG. 50, a heat flow path that passes from the lower surface of the optical disk 9 through the hole 73 or the recess of the rotor 72 and onto the optical disk 9 can be configured. For this reason, the heat of the lower surface of the optical disk 9 escapes upward, so that the heat is diffused.

  Further, in the optical disk apparatus of the present embodiment, a plurality of rotors 72 are provided in a balanced manner such as the positions and sizes of the holes 73. Thereby, when the rotor 72 of the spindle motor 7 rotates at high speed, unnecessary vibration due to unbalance does not occur.

  Further, as shown in FIGS. 49 to 54, the optical disc apparatus of the present embodiment is configured by providing holes 73 and recesses on the upper surface and side surfaces of the rotor 72, or by combining them. Air easily escapes to the top of the optical disk.

  In the optical disk device of the present embodiment, as shown in FIG. 52, it is also possible to form the hole 73 in an area within a diameter φ15 mm from the rotation center of the rotor 72. At this time, since the hole 73 is positioned inside the optical disk holding mechanism of the rotor 72, an effect of making the hole 73 invisible from the upper surface of the rotor 72 is obtained.

  In the optical disk device of the present embodiment, as shown in FIGS. 49, 50, 54, and 55, the spindle motor 7 of the spindle motor 7 that does not rotate with the optical disk is provided with a recess 74. It can be implemented as well. The recess 74 may be one or plural. Further, it is possible to similarly implement the spindle motor frame 70 by providing one or a plurality of holes (not shown).

  In addition, the concave portion provided in the rotor 72 and the concave portion 74 provided in the spindle motor frame 70 can be provided by punching or notching after molding, or molding can be performed by providing a convex portion on the mold during molding. It is.

  In the optical disk apparatus according to the present embodiment, it is also possible to use a light metal material as the material of the rotor 72 and the spindle motor frame 70. As the lightweight metal material, aluminum, aluminum alloy, magnesium alloy, titanium, titanium alloy, or the like is preferably used.

  Generally, a steel material such as SECC is used as the material of the rotor 72 and the spindle motor frame 70. However, by using a light metal material as the material of the rotor 72 and the spindle motor frame 70, the optical disk apparatus can be reduced in weight. Can be achieved.

  Aluminum or magnesium, which is a lightweight metal material, has a specific gravity of 1/3 of aluminum relative to steel and 1/4 of magnesium. In particular, by using a lightweight metal material for the rotor 72, which is the weight of the moving part, the rotor 72 As a result, the power consumption of the spindle motor 7 is reduced and the rise in heat can be suppressed.

  In addition, aluminum and magnesium, which are lightweight metal materials, have a thermal conductivity that is twice that of aluminum and 1.5 times that of magnesium. Thereby, especially by using these metal materials for the spindle motor frame 70, heat generated by the coil of the spindle motor 7 and the like can be easily released from the spindle motor frame 70, and an increase in heat can be suppressed as the optical disc apparatus. .

(Embodiment 6)
Next, the method for joining the frame portion and the covering member described in the first embodiment of the present invention will be described with further examples. The configuration of the optical disk device of the present embodiment is the same as that of the first embodiment of the present invention except for the method of joining the frame portion and the covering member.

  56 to 58 are diagrams showing an optical disc device according to Embodiment 6 of the present invention.

  56A is a plan view of the frame portion and the covering member before joining, FIG. 56B is a cross-sectional view taken along line AA of FIG. 56A, and FIG. 57A is a joining plane of the frame portion and the covering member. FIG. 57 (b) is a cross-sectional view taken along the line BB of FIG. 57 (a).

  As shown in FIG. 56 (a), a plurality of stepped portions 76a are provided at the peripheral portion of the covering member 76 or over the entire circumference, and a plurality of protruding portions 76b are provided on the stepped portion 76a. In the present embodiment, the protrusion 76b is a protrusion having a shape with a small root width and a width that widens toward the tip. Further, in the present embodiment, the thickness of the stepped portion 76 a is configured to be about half of the thickness of the plate material constituting the covering member 76.

  Note that the shape of the protrusion 76b may be a polygon, a circle, or a curve as long as the protrusion has a shape in which the width of the tip portion is wider than the width of the root portion.

  Further, a stepped portion 75a is provided at the peripheral portion of the frame portion 75 at a plurality of locations or around the entire circumference, and the stepped portion 75a is provided with a recessed portion 75b that is aligned with the plurality of protruding portions 76b. Yes. The recess 75b is configured with a certain clearance with the protrusion 76b.

  Further, in the present embodiment, the thickness of the stepped-down portion 75 a is configured to be about half of the thickness of the plate material that constitutes the frame portion 75.

  The protrusion 76b of the covering member 76 is inserted into the recess 75b of the frame portion 75 and subjected to caulking with a press or the like, so that the build-up portion pushed out from the frame portion 75 as shown in FIG. 75c is housed in a protruding stepped portion 76c provided on the protruding portion 76b, and the frame portion 75 and the covering member 76 are firmly bonded with a uniform thickness. At this time, the gap 77 can be provided by setting the width dimension when the stepped portions 75a and 76a are provided to have a predetermined relationship, and distortion caused by caulking can be alleviated by the gap 77. . This gap 77 does not need to be provided depending on the specifications. A plurality of caulking locations may be provided for the protrusion 76b.

  In the present embodiment, the recess 75 b is provided in the frame 75 and the protrusion 76 b is provided in the covering member 76. However, the protrusion 76 b is provided in the frame 75 and the recess 75 b is provided in the covering member 76. It is also good.

  Also, as shown in FIG. 57 (b), the bonding strength in the plate thickness direction (horizontal direction) is increased by providing a concave shape 78 by press molding at the portion where the protrusion 76b and the dent 75b overlap.

  The recessed shape 78 may be provided in a portion where the stepped portion 75a of the frame portion 75 and the stepped portion 76a of the covering member 76 are overlapped.

  Furthermore, the bonding strength between the frame portion 75 and the covering member 76 is increased by attaching a reinforcing sheet 79 to which a thin single-sided adhesive material is applied to a part or all of the joining portion of the frame portion 75 and the covering member 76. To increase. In particular, the bonding strength in the plate thickness direction (horizontal direction) increases. The material of the sheet is not particularly limited as long as it is a material having high tensile strength such as resin, metal, cloth, etc. However, considering strength, workability, pasting workability, cost, etc., a resin sheet is most suitable.

  The thickness of the sheet including the adhesive layer is preferably 0.1 mm or less. When the thickness of the sheet is 0.1 mm or more, there is no clearance from the tray and an obstacle to flexibility of the flexible printed board.

  In the present embodiment, the reinforcing sheet 79 is attached to the surface opposite to the caulking, but may be attached to the caulking surface.

  58 (a) is a plan view after joining the frame portion 75 and the covering member 76 with an adhesive, FIG. 58 (b) is a cross-sectional view taken along the line CC of FIG. 58 (a), and FIG. 58 (c) is with an adhesive. FIG. 5 is a plan view after joining a frame part 75 and a covering member 76.

  As shown in FIGS. 58 (a) and 58 (b), the frame portion 75 and the covering member 76 are joined with an adhesive 80 interposed between the stepped-down portions 75a and 76a. An adhesive confirmation hole 81 is provided on the 76 side. Confirmation of the bonding quality after performing adhesive bonding is generally a destructive inspection because the appearance cannot be confirmed. By providing the adhesive confirmation hole 81, it is possible to directly visually check the wettability of the adhesive 80 from the adhesive confirmation hole 81, such as forgetting to apply the adhesive in the bonding process or insufficient adhesion amount of the adhesive. This makes it possible to improve the reliability of the bonding quality.

  Further, when a UV curable adhesive is used for the adhesive 80, it is possible to accelerate the curing of the adhesive 80 from the adhesive confirmation hole 81 portion, thereby shortening the curing time and improving the bonding reliability. it can.

Further, the adhesive confirmation hole 81 may have a partially cutout shape as shown in FIG.
In the present embodiment, the adhesive confirmation hole 81 is provided on the covering member 76 side, but may be provided on the frame portion 75 side.

(Embodiment 7)
59 to 62 are perspective views showing an optical disk device according to Embodiment 7 of the present invention. In addition, the same thing as the code | symbol shown in FIGS. 26-29 is comprised by the same shape, a structure, and material. As shown in FIG. 59, the optical disk apparatus according to the present embodiment is provided with a V-shaped concave notch 100 at the end of the upper cover 22a in the tray drawing direction. Thereby, the displacement of the upper cover 22a due to the negative pressure generated by the rotation of the optical disk can be greatly reduced, and the weight of the upper cover 22a can be significantly reduced.

  Here, it is conceivable to further reduce the weight by removing all the upper cover 22a, but it is clear that the rigidity is low only with the lower cover 22b, and there is a possibility that deformation or the like may occur when the optical disc apparatus is handled. If the strength is increased only by the lower cover 22b, the weight is increased. The upper cover 22a and the lower cover 22b form a box shape, thereby ensuring rigidity.

  In the above description, the V-shaped concave shape has been described. However, a cutout portion 100 having a semicircular shape or other concave shape as shown in FIG. 61 may be provided.

  Further, as shown in FIG. 62, an inclined portion 101 may be provided at the end of the concave cutout portion 100 of the upper cover 22a. With this configuration, the optical disk and the spindle motor 7 are not easily caught by the upper cover 22a when the drawn tray is pushed into the casing, and the tray can be smoothly stored in the casing.

(Embodiment 8)
63 and 64 are a perspective view and a sectional view, respectively, showing an optical disk apparatus according to Embodiment 8 of the present invention. In addition, the same thing as the code | symbol shown in FIGS. 81-85 is comprised by the same shape, a structure, and material.

  Here, the optical disk device is mounted inside a portable electronic device such as a stationary electronic device such as a personal computer, a notebook personal computer, a portable information terminal device, or a portable video device. In the case of a type electronic apparatus, in order to realize a reduction in size and thickness, a casing of the apparatus is often provided without providing a space above the optical disc apparatus. In this case, for the purpose of reducing the negative pressure, when only the through hole is provided in the upper cover 22a, there is a situation in which the air is not sufficiently moved through the through hole, and the upper cover 22a is rotated by the high speed rotation of the optical disc 9. Deformation cannot be prevented.

  In order to solve this, as shown in FIG. 63 and FIG. 64 (partial cross-sectional view of FIG. 63), a concave step 110 is provided particularly on the flat surface 112 of the upper cover 22a in the vicinity of the outer periphery of the optical disk. A through hole 111 is provided in the concave stepped portion 110. With this configuration, even when the casing 117 of another device is disposed adjacent to the upper cover 22a, the concave step 110 is passed through to reduce the negative pressure in the cover 22 caused by the high-speed rotation of the optical disc 9, in particular. Since the air can be moved, the depression of the upper cover 22a due to the negative pressure generated by the rotation of the optical disk can be effectively reduced, and the upper cover 22a can be made thinner so that the weight can be significantly reduced. Become.

  Further, it is preferable that the through hole 111 is disposed in a range of a diameter φ60 mm to φ120 mm centered on the rotation center of the spindle motor 7. By providing the through hole 111 in the above range, the negative pressure of the optical disk 9 can be reliably reduced particularly at high speed rotation.

  As described above, by providing the through hole 111 in the concave stepped portion 110, even if the upper cover 22a is reduced in weight and the mechanical strength and rigidity are reduced to some extent, the upper cover 22a is recessed and comes into contact with the optical disk 9 or It can prevent contacting with other members.

  In the present embodiment, seven through holes are provided, such as the through hole 111, but the number may be less than this or more. That is, it is preferable to provide a plurality of through holes and arrange them in a circular shape, preferably at a predetermined interval.

  Furthermore, when used in an environment where there is a lot of dust outside the device, there is a possibility that dust may enter the inside through the through hole 111 from the outside. In such a case, a configuration in which a filter member that covers the through hole 111 is attached to the upper cover 22a may be employed. As the filter member, an unintelligible cloth, paper, a foamable sheet, a porous sheet, or the like is preferably used.

  In addition, the through hole 111 is a circular hole, but it may be a square shape, a triangular shape or a polygonal shape of a pentagon or more, or at least one of the through holes 111 may be another through hole. It may be different from the shape of 111. In this way, the shape of the through hole 111 can be varied, or the arrangement position of the through hole 111 (distance from the center of the spindle motor 7 or the like) can be varied.

(Embodiment 9)
FIG. 65 is a perspective view showing an optical disc apparatus according to Embodiment 9 of the present invention. 113 is a step provided on the flat surface 112 so as to protrude, and 114 is a through hole provided in the vicinity of the step 113. With such a configuration, air can move in the same manner as in the eighth embodiment, so that the same effect can be obtained.

(Embodiment 10)
FIG. 66 is a perspective view showing an optical disc apparatus according to Embodiment 10 of the present invention. Reference numeral 115 denotes a stepped portion provided on the convex surface with respect to the flat surface portion 112, and 116 denotes a through hole provided near the stepped portion 115. Here, the step portion 115 and the through hole 116 can be formed by press working as in the eighth and ninth embodiments. With such a configuration, the step portion and the through hole are formed by the same processing means, which is suitable for mass production.

(Embodiment 11)
67 and 68 are partial cross-sectional views showing the optical disc apparatus according to Embodiment 11 of the present invention. In addition, the same thing as the code | symbol shown in FIGS. 81-88 is comprised by the same shape, a structure, and material.

  In FIG. 67, reference numeral 120 denotes a pointed protrusion provided on the rotor 72 of the spindle motor 7. The pointed protrusion 120 is provided on the rotor 72 facing the upper cover 22a, and the pointed end is on the rotation axis of the rotor 72 and is pointed toward the upper cover 22a. With this configuration, even if the upper cover 22a is largely displaced toward the optical disk 9 due to the negative pressure generated between the optical disk 9 and the upper cover 22a, the contact portion between the upper cover 22a and the spindle motor 7 becomes point contact. The influence of friction can be reduced. The shaft of the spindle motor 7 is always in contact with the thrust plate inside the spindle motor 7, and the weight of the optical disk 9 and the suction force are always applied. In the present embodiment, by providing the pointed protrusion 120 on the opposite side, even if the upper cover 22a and the spindle motor 7 come into contact with each other, the load due to friction is small, and the rotational fluctuation is small. Moreover, it is possible to prevent a loud sound from being generated.

  The pointed protrusion 120 may be formed integrally with the rotor 72 or may be formed of a separate member.

  Further, as shown in FIG. 68, it is also possible to provide the pointed protrusion 120 on the upper cover 22a facing the rotor 72 in the same manner. In this case, the pointed protrusion 120 has a pointed tip on the rotation axis of the rotor 72 of the spindle motor 7 and pointed toward the rotor 72.

  Further, it is also possible to apply a coating with good fluorine or lubrication to the tip projection 120 or the portion with which the tip projection 120 contacts. Thereby, the surface roughness accuracy is improved and the contact resistance can be reduced.

  Further, in the present embodiment, the pointed protrusion 120 is used for explanation. However, when the upper cover 22a is largely displaced toward the optical disc 9, the point between the upper cover 22a and the spindle motor 7 is point contact. It suffices to use a member having a substantially spherical surface or a bearing.

(Embodiment 12)
Next, attachment of a pickup frame and a pickup cover constituting the pickup module will be described.

  69 is a perspective view showing an optical disk device according to a twelfth embodiment of the present invention, FIG. 70 is an external view showing a pickup module according to the twelfth embodiment of the present invention, and FIG. 71 is a diagram of the pickup module according to the twelfth embodiment of the present invention. It is an exploded view. 69 to 71, 49 is a pickup module, 50 is a pickup cover, 58 is a pickup frame, 202 is a spiral, and 203 is a through hole. The configurations of the pickup module and the entire optical disc apparatus are the same as those in the second embodiment.

  Hereinafter, the characteristic part in Embodiment 12 of this invention is demonstrated.

  72 is a combined external view of the pickup cover and the pickup frame in the twelfth embodiment of the present invention, and is an enlarged view of a broken line portion C in FIG. FIG. 73 is a sectional view of the pickup cover and the pickup frame combined in the twelfth embodiment of the present invention, and is a sectional view of FIG. FIG. 74 is a sectional view of the pickup cover and the pickup frame according to the twelfth embodiment of the present invention, in which FIG. 74 (a) is without an elastic body, and FIGS. 74 (b) and 74 (c) are elastic. It has a body. 72 to 74, 50 is a pickup cover, 58 is a pickup frame, 201 is a protrusion, 202 is a spiral, 203 is a through hole, and 204 is an elastic body.

  A tray cover 2 a is provided on the lower cover 1 b side of the tray 2. The pickup cover 50 is attached to the pickup frame 58 using a spiral 202 or the like, and has a substantially bag-like configuration in combination with the tray 2 or the tray cover 2a. The component parts of the pickup module 6 which are fixed to each other and are disposed substantially inside the bag shape are protected.

  The pickup frame 58 is provided with a protrusion 201 that is an attachment portion to the pickup cover 50. The protrusion 201 is provided on a plane to which the pickup cover 50 of the pickup frame 58 is attached, and is coupled to a spiral 202 that is an example of a fixing member through a through hole 203 provided in the pickup cover 50. As shown in FIG. 73, the fixing member such as the spiral 202 includes a crimping portion 202a and an insertion portion 202b, and the pickup frame 58 and the pickup cover 50 are arranged so that the crimping portion 202a is in contact with the protrusion 201 provided on the pickup frame 58. Fixing is performed. The pickup frame 58 and the pickup cover 50 are fixed by the insertion portion 202b, the positional relationship between the fixing member and the pickup frame 58 is maintained, and the contact between the crimping portion 202a and the pickup frame 58 is maintained.

  By doing so, the crimping portion 202a of the fixing member comes into contact with the pickup frame 58, and the fixing member such as the spiral 202 and the pickup cover 50 do not come into strong contact. As a result, in the fitting portion between the pickup frame 58 and the pickup cover 50, although a very slight rattle occurs between the pickup frame 58 and the pickup cover 50, there is no detachment of the pickup cover 50 and the relative positional relationship is maintained. Since it is equivalent to substantial fixation, the deformation of the pickup cover 50 due to the fixing force by the fixing member such as the spiral 202, the materials of the pickup cover 10 and the pickup frame 58 are different, and the coefficients of thermal expansion are different from each other. It is possible to prevent thermal deformation. Further, the provided protrusion 201 may be integrated with the pickup frame 58 or may be configured by attaching another member to the pickup frame 58.

  In the twelfth embodiment, the protrusion 201 provided on the pickup frame 58 is integrated with the pickup frame 58 in consideration of workability, and the shape of the protrusion 201 has a height of about 0.21 to. A substantially cylindrical shape having a diameter of 3 mm, an inner diameter of about 1.4 mm, and an outer shape of about 2.4 mm was used. In addition, the surface of the protruding portion 201 facing the spiral 202 is set smaller than the crimping surface of the crimping portion 202 a of the spiral 202. In the case of the twelfth embodiment, an M1.4 spiral 202 having a crimped surface having an outer shape of about 3 mm is used for the protrusion 201 having an outer shape of about 2.4 mm. By doing so, the area of the surface of the spiral 202 facing the pickup cover 50 is increased, and an extremely small backlash occurs between the pickup frame 58 and the pickup cover 50 at the fitting portion between the pickup frame 58 and the pickup cover 50. However, there is no detachment of the pickup cover 50, so that the relative positional relationship can be maintained, and substantial fixing can be reliably performed.

  Further, since the pickup frame 58 and the pickup cover 50 are in contact with each other, when the total length of the protrusion 201 provided on the pickup frame 58 is longer than the thickness of the pickup cover 50, the contact between the fixing member such as the spiral 202 and the pickup cover 50. Therefore, it is possible to reliably prevent the deformation of the pickup cover 50 due to the fixing force by the fixing member such as the spiral 202 and the thermal deformation due to the different materials of the pickup cover 10 and the pickup frame 58 and different thermal expansion coefficients. it can.

  In this case, the difference between the total length of the protruding portion 201 and the thickness of the pickup cover 50 is preferably about 0.01 to 0.1 mm. By doing so, the dimension in the direction orthogonal to the main plane portion of the pickup cover 50 is set. It is possible to achieve both the tolerance and the prevention of deformation of the pickup cover due to the fixing force by the fixing member.

  Further, the protruding portion 201 includes an inner portion 62 provided inside the pickup frame 58, a standing portion 67 provided integrally with the inner portion 62, and a standing portion shown in FIG. 25 of the second embodiment. Pickup provided with an outer part 68 provided outside the pickup frame 58 provided integrally with the part 67, and fixing parts 59, 60, 61 provided on the outer part 68 to be attached to other members. By providing the frame 58, it is possible to realize an optical disc apparatus that can be further reduced in weight.

  In the twelfth embodiment, the through hole 203 provided in the pickup cover 50 has a substantially oval shape, and the center of the through hole 203 is substantially the same as the center of the crimping surface of the crimping portion 202a of the fixing member. In addition, the surface of the protrusion 201 provided on the pickup frame 58 that faces the fixing member is substantially circular, and the center of the protrusion 201 is the hole of the through hole 203 provided in the pickup cover 50. The configuration is substantially the same as the center. The major axis of the through-hole 203 was about 3.0 mm, and the minor axis was about 2.4 mm. The center of the hole in the through hole 203 and the center of the crimping surface of the crimping part 202a of the fixing member are substantially the same, or the center of the protrusion 201 is substantially the same as the center of the hole of the through hole 203 provided in the pickup cover 50. As a result, it becomes easy to insert the pickup cover 50 and the spiral 202 into the pickup frame 58, so that the fixing member such as the pickup cover 50 and the spiral 202 can be easily assembled into the pickup frame 58.

  Further, the radial direction of the through hole 203 provided in the pickup cover 50 is configured to be substantially parallel to the main plane portion of the pickup cover 50. Substantially parallel means that the relative parallelism is 10 degrees or less. Since the radial direction of the through-hole 203 provided in the pickup cover 50 is substantially parallel to the main plane portion of the pickup cover 50, the pickup cover 50 and the fixing member such as the spiral 202 are easily assembled into the pickup frame 58. be able to.

  Furthermore, in order for the crimping part 202a of the fixing member such as the spiral 202 and the pickup frame 58 to contact, the crimping part 202a of the fixing member such as the spiral 202 has a two-stage structure as shown in FIG. One crimping surface may be in contact with the pickup frame 58. 74 (b), the elastic body 204 is sandwiched between the spiral 202 and the pickup cover 50, or the elastic body 204 is elastic between the pickup cover 50 and the pickup frame 58 as shown in FIG. 74 (c). The body 204 may be sandwiched. By doing so, it is possible to prevent minute rattling that occurs when the pickup frame 58 and the pickup cover 50 are fixed by the contact between the pressing surface 202a of the fixing member and the pickup frame 58.

  73, when the pickup cover 50 and the pickup frame 58 are combined, the elastic body 204 is sandwiched between the spiral 202 and the pickup cover 50, or between the pickup cover 50 and the pickup frame 58, as described above. By sandwiching the elastic body 204 between the two, it is possible to prevent minute rattling that occurs when the pickup frame 58 and the pickup cover 50 are fixed. In these cases, as a material for forming the elastic body 204, a foamable rubber such as neoprene or silicon, a polyethylene-based or urethane-based resin, or a flexible material such as felt, elastomer, or polypropylene is used.

  Further, a fixing member such as a spiral 202 having a two-stage crimping portion 202a is provided with an inner portion 62 provided inside the pickup frame 58 and an inner portion 62 shown in FIG. 25 of the second embodiment. , A standing portion 67 provided integrally with each other, an outer portion 68 provided outside the pickup frame 58 provided integrally with the standing portion 67, and a mounting portion provided on the outer portion 68 to other members. By using the pickup frame 58 having the fixing portions 59, 60, and 61, it is possible to realize an optical disc apparatus that can be further reduced in weight.

  As a result, the thickness of the constituent material is reduced, or the pickup cover is deformed due to the fixing force by the fixing member such as a spiral or the pickup cover and the pickup frame, even if the material is thin or lightweight using a lightweight material. Therefore, it is possible to prevent thermal deformation caused by different materials and different thermal expansion coefficients. Therefore, it is possible to provide an optical disc apparatus capable of realizing weight reduction.

  In the twelfth embodiment, the spiral 202 is used as the fixing member. However, the fixing member is not limited to the spiral 202, and any member may be used as long as it has the crimping portion 202b such as a nail or a shaft. In addition, the shape of the protrusion 201 is not limited to a substantially cylindrical shape, and any shape may be used as long as the portion that contacts the crimping portion 202b of the spiral 202, such as a substantially rectangular parallelepiped shape or a substantially triangular prism shape.

  Further, in the twelfth embodiment, the through hole 203 provided in the pickup cover 50 has a substantially oval shape, and the center of the hole in the through hole 203 and the center of the crimping surface in the crimping portion 202a of the fixing member are substantially the same. The surface facing the fixing member of the protrusion 201 provided on the pickup frame 58 is substantially circular, and the center of the protrusion 201 is the center of the hole of the through hole 203 provided in the pickup cover 50. Although the configuration is substantially the same, it is only necessary that the protrusion 201 provided on the pickup frame 58 can be brought into contact with the crimping surface of the crimping portion 202a of the fixing member, and the center of the hole of the through hole 203 and the crimping portion of the fixing member 202a in the center of the crimping surface and the main plane direction of the pickup cover 58 of the protrusion 201 provided on the pickup frame 58. Positional relationship of the center is not limited thereto.

  Further, the radial direction of the through-hole 203 provided in the pickup cover 50 is not limited to being parallel to the main plane portion of the pickup cover 50, but the pickup cover 50 and the spiral 202 to the pickup frame 58, etc. If it is considered that the fixing member is easily assembled, the radial direction of the through hole 203 provided in the pickup cover 50 is preferably substantially parallel to the main flat surface portion of the pickup cover 50.

(Embodiment 13)
Next, a method for increasing the rigidity of the pickup cover constituting the pickup module will be described.

  75 is a perspective view showing an optical disk apparatus according to Embodiment 13 of the present invention, FIG. 76 is an external view showing a pickup module according to Embodiment 13 of the present invention, and FIG. 77 is a pickup according to Embodiment 13 of the present invention. It is an exploded view of a module. 75 to 77, 7 is a spindle motor, 49 is a pickup module, 50 is a pickup cover, and 301 is a convex portion. The configurations of the pickup module and the entire optical disc apparatus are the same as those in the second embodiment and the twelfth embodiment.

  Hereinafter, the characteristic part in Embodiment 13 of this invention is demonstrated.

  78 to 83 are external views of the pickup cover according to the thirteenth embodiment of the present invention, FIG. 84 is a sectional view showing a part of the pickup cover according to the thirteenth embodiment of the present invention, and FIGS. FIG. 38 is a cross-sectional view showing a protrusion provided on the pickup cover in the thirteenth embodiment. 78 to 80, 50 is a pickup cover, 301 is a convex portion, and 302 is another member. 78 to 83, FIG. 78 shows a case where the convex portion 301 is linear, FIG. 79 shows a case where the convex portion 301 is curved, and FIG. The case where it is provided in two groups is shown. 81 to 83, FIG. 81 shows a state in which the separate member 302 is attached to the pickup cover 50, and FIG. 82 shows a state in which the separate member 302 is embedded in the hollow portion of the convex portion 301. FIG. 83 is a diagram showing a cross-sectional portion of the convex portion 301 shown in FIG.

  A tray cover 2 a is provided on the lower cover 1 b side of the tray 2. The pickup cover 50 is attached to the pickup frame 58 using a spiral 202 or the like, and has a substantially bag-like configuration in combination with the tray 2 or the tray cover 2a. The component parts of the pickup module 6 which are fixed to each other and are disposed substantially inside the bag shape are protected.

  In the present invention, a convex portion 301 is provided on at least a part of the main plane portion of the pickup cover 50, and this convex portion 301 serves as a beam to increase the rigidity of the pickup cover main plane portion. This makes it possible to reduce the deflection generated in the main flat surface portion of the pickup cover due to the negative pressure during the rotation of the optical disk.

  In the thirteenth embodiment, the convex portion 301 has a height of about 0.1 to 0.2 mm and a width of about 0.1 to 0.2 mm on the upper cover 22a side that constitutes the cover 22 of the pickup cover 50 as shown in FIGS. An elongated shape having a length of 1 to 2 mm and a length of about 5 mm to 15 mm is formed by a technique such as punching, the distance between the convex portions is about 2 to 4 mm, and the cross-sectional shape of the convex portion 301 is substantially U-shaped. did. By doing so, the deflection generated in the main plane portion of the pickup cover 50 due to the influence of negative pressure during the rotation of the optical disk 9 is effectively suppressed without reducing the tolerance of the distance between the pickup cover 50 and the carriage 8. This makes it possible to secure a balanced distance margin for both the optical disk 9 and the carriage 8 when the optical disk is mounted. The cross-sectional shape of the convex portion 301 is not limited to the substantially U-shape shown in FIGS. 78 and 85, and may be, for example, a semicircle shown in FIG. 86 or a triangle shown in FIG. Further, in the case of the thirteenth embodiment, the number of provided convex portions 301 is four, but the number of provided convex portions 301 is not limited to this, as shown in FIGS. 86 and 87. There may be five cases. Further, the shape of the convex portion 301 is not limited to the linear shape shown in FIG. 78, but may be a curved shape as shown in FIG.

  Further, as shown in FIG. 25 of the second embodiment, the convex portion 301 includes an inner portion 62 provided on the inner side of the pickup frame 58, a standing portion 67 provided integrally with the inner portion 62, and a standing portion. Pickup provided with an outer part 68 provided outside the pickup frame 58 provided integrally with the part 67, and fixing parts 59, 60, 61 provided on the outer part 68 as attachment parts to other members. By providing the pickup cover 50 coupled to the frame 58, an optical disc apparatus that can be further reduced in weight can be realized.

  Further, in the thirteenth embodiment, it is assumed that the shape is elongated in a direction parallel to the main plane portion of the pickup cover 50, and the minor axis direction is substantially parallel to the radial direction of the optical disc when the optical disc is loaded. Substantially parallel means that the relative parallelism is 10 degrees or less. By doing so, the convex portions 301 can be arranged at a high density in the direction in which the strength of the main plane portion of the pickup cover 50 is desired to be increased.

  Furthermore, the convex portion 301 provided on the pickup cover 50 is disposed in the vicinity of the spindle motor 7. The vicinity of the spindle motor 7 is a range with a radius of about 20 mm from the center of the rotation axis of the spindle motor 7. Even if an optical disc with a warped surface direction is mounted on the optical disc apparatus, the warp is relatively small on the inner periphery of the optical disc, and therefore the distance between the convex portion provided on the main plane portion of the pickup cover 50 and the optical disc with respect to the warp of the optical disc. A sufficient margin can be secured.

  As described above, by providing at least one of the concave portion or the convex portion on the main plane portion of the pickup cover 50, the rigidity of the main plane portion of the pickup cover 50 can be increased, and the negative pressure during rotation of the optical disc 9 can be increased. Deflection occurring in the main plane portion of the pickup cover 50 due to the influence can be reduced. Therefore, even if the thickness of the constituent material is reduced, or the thin or light weight material using a light material is used, it is possible to reduce the deflection generated in the main plane portion of the pickup cover 50, thereby realizing a reduction in weight. It is possible to provide an optical disc device that can be used.

  In the thirteenth embodiment, the convex portion 301 is formed on the upper cover 22a side that constitutes the cover 22 of the pickup cover 50 by a technique such as punching, but the convex portion 301 constitutes the cover 22 of the pickup cover 50. Even if it is formed on the lower cover 22b side, the same effect can be obtained, and the forming method is not limited to the punch. In consideration of a thin optical disk device, it is preferable to provide the convex portion 301 on the upper cover 22a side that constitutes the cover 22 of the pickup cover 50 in consideration of the space between components.

  In the thirteenth embodiment, the pickup cover 50 has an elongated shape with respect to a plane parallel to the main plane portion of the pickup cover 50, and the minor axis direction is substantially parallel to the radial direction of the optical disc 9. It is not limited to a shape that is elongated with respect to a plane parallel to the 50 main plane portions and whose minor axis direction is substantially parallel to the radial direction of the optical disk 9. If the rigidity of the main plane portion of the pickup cover 50 is to be maximized in a limited space, the filling rate of the convex portion 301 is increased, so that the plane parallel to the main plane portion of the pickup cover 50 is increased. It is preferable that the short axis direction is substantially parallel to the radial direction of the optical disk 9 in order to make it an elongated shape and smoothly adjust the wind generated when the optical disk 9 rotates.

  Further, in the thirteenth embodiment, the convex portion 301 provided on the pickup cover 50 is disposed in the vicinity of the spindle motor 7. However, the convex portion 301 provided on the pickup cover 50 is limited to being disposed in the vicinity of the spindle motor 7. It is not what is done. In order to secure a sufficient distance margin between the convex portion 301 provided on the main flat surface of the pickup cover and the optical disc against the warp of the optical disc, the convex portion 301 provided on the pickup cover 50 is disposed in the vicinity of the spindle motor 7. Is preferred.

  Furthermore, in the thirteenth embodiment, as an example of providing at least one of a concave portion or a convex portion on the main plane portion of the pickup cover 50, a convex portion 301 is provided on at least a part of the main plane portion of the pickup cover 50. Although the case has been described, the method of providing at least one of the concave portion or the convex portion on the main plane portion of the pickup cover 50 is not limited to the case where the convex portion 301 is provided on at least a part of the main plane portion of the pickup cover 50. . For example, another member 302 may be attached instead of forming the convex portion.

  When the separate member 302 is attached to the pickup cover 50 to increase the strength, the separate member 302 serves as a beam as in the case where the convex portion 301 is provided, so the mounting position, mounting direction, and size are convex portions. It is preferable to be the same as 301.

  Therefore, the separate member 302 is disposed on the upper cover 22a side that constitutes the cover 22, has an elongated shape in a direction parallel to the main plane portion of the pickup cover 50, and the minor axis direction is substantially the same as the radial direction of the optical disc when the optical disc is loaded. They are preferably parallel and in the vicinity of the spindle motor. By doing so, a balanced distance margin can be secured for both the optical disk and the carriage when the optical disk is mounted, and a separate member is provided in the direction in which the strength of the main flat portion of the pickup cover is desired to be increased. It is possible to arrange the optical discs at a high density, and to ensure a sufficient distance margin between the optical disc and another member attached to the main plane portion of the pickup cover with respect to the warp of the optical disc.

  The attached separate member 302 has an elongated shape having a height of about 0.1 to 0.2 mm, a width of about 1 to 2 mm, and a length of about 5 to 15 mm, and is attached to the pickup cover 50 with an adhesive or the like. . The size of the separate member to be attached is not limited to these, and the attachment method is not limited to the adhesive. For example, a method such as pressure bonding may be used. The material constituting the separate member 302 is preferably a metal, but may be a resin in consideration of productivity.

  As a method of providing at least one of a concave portion or a convex portion on the main flat surface portion of the pickup cover 50, a case where the convex portion 301 is provided on at least a part of the main flat surface portion of the pickup cover 50, or at least one of the main flat surface portions of the pickup cover 50 Although the case where the separate member 302 is attached to the portion has been described, these can also be used together. In that case, by embedding the separate member 302 in the hollow portion of the U-shaped convex portion 301 as shown in FIG. Furthermore, the strength of the pickup cover 50 can be increased.

  As described above, in order to reduce the weight of the optical disk device, the mechanical strength of each part becomes a problem when each part is made of a relatively light material and sometimes has a thin thickness. Paying attention to the above, at least the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, the eighth embodiment, and the embodiment described above. By adopting at least one configuration of the ninth, tenth, eleventh, twelfth, and thirteenth embodiments, a reduction in mechanical strength of each part can be suppressed even if the weight is reduced.

  Further, by combining the configurations described in the first to thirteenth embodiments and simultaneously satisfying the configuration, an optical disc apparatus having a weight of 120 g or less (100 g or less) can be realized.

  Further, at least one of the upper cover 22a, the lower cover 22b, the pickup module 49, the spindle motor 7, the pickup cover 50, and the pickup frame 58 is configured as described above, so that the optical disk device can be reduced in weight.

  By providing at least one of a concave portion or a convex portion on the main plane portion of the pickup cover, the present invention can reduce the deflection generated in the main plane portion of the pickup cover due to negative pressure during rotation of the optical disc. The present invention can be applied to a stationary electronic device such as a computer, an optical disk device suitably used for a portable electronic device such as a notebook personal computer, a portable information terminal device, and a portable video device.

1 is a perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a plan view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a side view showing an optical disc apparatus according to Embodiment 1 of the present invention. FIG. 2 is a partially enlarged view showing the optical disc apparatus in Embodiment 1 of the present invention. FIG. 2 is a partially enlarged view showing the optical disc apparatus in Embodiment 1 of the present invention. 1 is a partial perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial side sectional view showing an optical disk device according to Embodiment 1 of the present invention. 1 is a partial perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial side sectional view showing an optical disk device according to Embodiment 1 of the present invention. 1 is a partial side sectional view showing an optical disk device according to Embodiment 1 of the present invention. 1 is a partial perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial side sectional view showing an optical disk device according to Embodiment 1 of the present invention. 1 is a perspective view showing an optical disc device according to Embodiment 1 of the present invention. 1 is a partial side sectional view showing an optical disk device according to Embodiment 1 of the present invention. 1 is a partial side sectional view showing an optical disk device according to Embodiment 1 of the present invention. 1 is a partial side sectional view showing an optical disk device according to Embodiment 1 of the present invention. The perspective view which shows the optical disk apparatus in Embodiment 2 of this invention. Surface view showing an optical disc apparatus according to Embodiment 2 of the present invention. FIG. 6 is a back view showing the optical disk device according to Embodiment 2 of the present invention. FIG. 7 is a partial perspective view showing an optical disc device according to Embodiment 2 of the present invention. The partial perspective view which shows the optical disk apparatus in Embodiment 3 of this invention (A) Partial perspective view showing an optical disc device according to Embodiment 3 of the present invention, (b) Partial side sectional view showing an optical disc device according to Embodiment 3 of the present invention. (A) Partial perspective view showing an optical disc device according to Embodiment 3 of the present invention, (b) Partial side sectional view showing an optical disc device according to Embodiment 3 of the present invention. The partial perspective view which shows the optical disk apparatus in Embodiment 3 of this invention The partial perspective view which shows the optical disk apparatus in Embodiment 3 of this invention (A) Partial perspective view showing an optical disc device according to Embodiment 3 of the present invention, (b) Partial side sectional view showing an optical disc device according to Embodiment 3 of the present invention. The partial perspective view which shows the optical disk apparatus in Embodiment 3 of this invention The partial perspective view which shows the optical disk apparatus in Embodiment 3 of this invention The partial perspective view which shows the optical disk apparatus in Embodiment 3 of this invention The partial perspective view which shows the optical disk apparatus in Embodiment 3 of this invention The perspective view which shows the optical disk apparatus in Embodiment 3 of this invention. (A) Partial perspective view showing an optical disc device according to Embodiment 3 of the present invention, (b) Partial side sectional view showing an optical disc device according to Embodiment 3 of the present invention. FIG. 7 is a perspective view showing an optical disc device according to Embodiment 4 of the present invention. FIG. 7 is a perspective view showing an optical disc device according to Embodiment 4 of the present invention. FIG. 7 is a perspective view showing an optical disc device according to Embodiment 4 of the present invention. FIG. 7 is a perspective view showing an optical disc device according to Embodiment 4 of the present invention. The partial perspective view which shows the optical disk apparatus in Embodiment 4 of this invention The partial perspective view which shows the optical disk apparatus in Embodiment 4 of this invention The elements on larger scale which show the optical disk apparatus in Embodiment 4 of this invention (A) Partial enlarged view showing an optical disk device according to Embodiment 4 of the present invention, (b) Partial side sectional view showing an optical disk device according to Embodiment 4 of the present invention. (A) Partial enlarged view showing an optical disk device according to Embodiment 4 of the present invention, (b) Partial side sectional view showing an optical disk device according to Embodiment 4 of the present invention. (A) Partial enlarged view showing an optical disk device according to Embodiment 4 of the present invention, (b) Partial side sectional view showing an optical disk device according to Embodiment 4 of the present invention. (A) Partial perspective view showing an optical disk device according to Embodiment 4 of the present invention, (b) Partial side sectional view showing an optical disk device according to Embodiment 4 of the present invention. (A) Partial surface view showing an optical disk apparatus according to Embodiment 5 of the present invention, (b) Partial side sectional view showing an optical disk apparatus according to Embodiment 5 of the present invention, (c) In Embodiment 5 of the present invention. Partial rear view showing optical disk device (A) Partial surface view showing an optical disk apparatus according to Embodiment 5 of the present invention, (b) Partial side sectional view showing an optical disk apparatus according to Embodiment 5 of the present invention, (c) In Embodiment 5 of the present invention. Partial rear view showing optical disk device (A) Partial surface view showing an optical disk apparatus according to Embodiment 5 of the present invention, (b) Partial side sectional view showing an optical disk apparatus according to Embodiment 5 of the present invention, (c) In Embodiment 5 of the present invention. Partial rear view showing optical disk device (A) Partial surface view showing an optical disk apparatus according to Embodiment 5 of the present invention, (b) Partial side sectional view showing an optical disk apparatus according to Embodiment 5 of the present invention, (c) In Embodiment 5 of the present invention. Partial rear view showing optical disk device (A) Partial surface view showing an optical disk apparatus according to Embodiment 5 of the present invention, (b) Partial side sectional view showing an optical disk apparatus according to Embodiment 5 of the present invention, (c) In Embodiment 5 of the present invention. Partial rear view showing optical disk device (A) Partial surface view showing an optical disk apparatus according to Embodiment 5 of the present invention, (b) Partial side sectional view showing an optical disk apparatus according to Embodiment 5 of the present invention, (c) In Embodiment 5 of the present invention. Partial rear view showing optical disk device (A) Partial surface view showing an optical disk apparatus according to Embodiment 5 of the present invention, (b) Partial side sectional view showing an optical disk apparatus according to Embodiment 5 of the present invention, (c) In Embodiment 5 of the present invention. Partial rear view showing optical disk device (A) A plan view of the frame portion and the covering member before joining of the optical disc apparatus according to Embodiment 6 of the present invention, and (b) A of the frame portion and the covering member before joining of the optical disc device according to Embodiment 6 of the present invention. -A sectional view (A) Joining plan view of frame portion and covering member of optical disc apparatus according to Embodiment 6 of the present invention, (b) BB sectional view of frame portion and covering member of optical disc apparatus according to Embodiment 6 of the present invention. (A) The top view after joining with the adhesive agent of the flame | frame part and coating | coated member of the optical disk apparatus in Embodiment 6 of this invention, (b) Bonding of the flame | frame part and coating | coated member of the optical disk apparatus in Embodiment 6 of this invention CC sectional view after joining with an agent, (c) Plan view after joining with an adhesive between a frame portion and a covering member of an optical disc apparatus in Embodiment 6 of the present invention A perspective view showing an optical disc device according to a seventh embodiment of the present invention. A perspective view showing an optical disc device according to a seventh embodiment of the present invention. A perspective view showing an optical disc device according to a seventh embodiment of the present invention. A perspective view showing an optical disc device according to a seventh embodiment of the present invention. The perspective view which shows the optical disk apparatus in Embodiment 8 of this invention. Sectional drawing which shows the optical disk apparatus in Embodiment 8 of this invention A perspective view showing an optical disc device according to a ninth embodiment of the present invention. A perspective view showing an optical disc device according to a tenth embodiment of the present invention. Partial sectional view showing an optical disk apparatus according to an eleventh embodiment of the present invention. Partial sectional view showing an optical disk apparatus according to an eleventh embodiment of the present invention. A perspective view showing an optical disc device according to a twelfth embodiment of the present invention. External view showing a pickup module according to Embodiment 12 of the present invention. Exploded view of pickup module according to Embodiment 12 of the present invention Combined appearance view of pickup cover and pickup frame in Embodiment 12 of the present invention Sectional view of coupling of pickup cover and pickup frame in Embodiment 12 of the present invention FIG. 10 is a sectional view of the pickup cover and the pickup frame combined in Embodiment 12 of the present invention. A perspective view showing an optical disc device according to a thirteenth embodiment of the present invention. External view showing a pickup module according to Embodiment 13 of the present invention. Exploded view of pickup module in Embodiment 13 of the present invention External view of pickup cover in embodiment 13 of the present invention External view of pickup cover in embodiment 13 of the present invention External view of pickup cover in embodiment 13 of the present invention External view of pickup cover in embodiment 13 of the present invention External view of pickup cover in embodiment 13 of the present invention External view of pickup cover in embodiment 13 of the present invention Sectional drawing which shows a part of pickup cover in Embodiment 13 of this invention Sectional drawing which shows the convex part provided in the pickup cover in Embodiment 13 of this invention Sectional drawing which shows the convex part provided in the pickup cover in Embodiment 13 of this invention Sectional drawing which shows the convex part provided in the pickup cover in Embodiment 13 of this invention Sectional drawing which shows the convex part provided in the pickup cover in Embodiment 13 of this invention Partial perspective view showing a conventional optical disc apparatus Partial perspective view showing a conventional optical disc apparatus Partial perspective view showing a conventional optical disc apparatus Partial perspective view showing a conventional optical disc apparatus (A) Partial surface view showing a conventional optical disk device, (b) Partial side sectional view showing a conventional optical disk device, and (c) Partial rear view showing a conventional optical disk device. The figure which shows the conventional optical disk device Partial side sectional view showing a conventional optical disc apparatus Partial side sectional view showing a conventional optical disc apparatus Partial side sectional view showing a conventional optical disc apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover 1a Upper cover 1b Lower cover 1c Opening 2 Tray 2a Tray cover 3 Bezel 4 Eject button 5 Opening part 7 Spindle motor 8 Carriage 9 Optical disk 10 Pickup cover 11 Motor 12, 13 Rail 14, 15 Rail guide 18 Control board 19, 20 Integrated circuit 21 Printed circuit board 22 Cover 22a Upper cover 22b Lower cover 22c, 22d, 22e Rib 22f Opening 22g Wing part 22j Vertical wall part 22k, 22n, 22p, 22q, 22r, 22s Hole 22l, 22m Plane part 22u Step part 23 Rail Guide fixing claw 23a, 23b Rib 23c Through hole 24 Rail locking claw 24a Restriction part 24b Locking part 25, 75 Frame part 25a, 25b, 25c, 25d Through hole 25e, 25j, 25k Connecting part 25 f, 25g, 25h, 25i, 26a Through hole 25l Protrusion part 25m, 26b Stepped part 26, 27, 28, 29, 30, 31, 32, 33, 76 Cover member 34 Gap 35 Adhesive 36 Welding part 37, 38 , 39, 40, 41 Through hole 42 Filter member 43 Dome part 44 Protrusion part 45, 46, 47 Concave part 48 Projection part 49 Pickup module 50 Pickup cover 51 Drive shaft 52, 53 Guide shaft 54 Through hole 55 Non-parallel part 56 Parallel part 57 corner part 58 pickup frame 59, 60, 61 fixing part 59a, 60a, 61a hole 59b, 60b, 61b root part 62 inner part 63, 64, 65, 66 through hole 67 standing part 68 outer part 69 through hole 70 Spindle motor frame 71 Stator 72 Rotor 73 Hole 74 Recess 75a, 76a Stepped-down portion 75b Recessed portion 76b Protruding portion 77 Gap 78 Recessed shape 79 Reinforcement sheet 80 Adhesive 81 Adhesive confirmation hole 100 Notch portion 101 Inclined portion 110 Step portion 111 Through hole 112 Planar portion 113 Step portion 114 Through hole 115 Step 116 116 Through-hole 117 Case (Other equipment)
DESCRIPTION OF SYMBOLS 120 Pointed protrusion 201 Projection part 202 Spiral 202a Crimp part 202b Insertion part 203 Through-hole 301 Protrusion part 302

Claims (11)

The pickup cover includes at least a cover, a tray provided in the cover so as to be housed or pulled out, a pickup module provided with the optical device provided in the tray, and a pickup cover provided in the pickup module. An optical disc apparatus characterized in that at least one of a concave portion or a convex portion is provided on a main plane portion. 2. The optical disc apparatus according to claim 1, wherein a convex portion is provided on at least a part of a main flat portion of the pickup cover. The optical disk apparatus according to claim 1, wherein another member is attached to at least a part of the main flat surface portion of the pickup cover. The pickup frame constituting the pickup module includes an inner part provided inside the pickup frame, a standing part provided integrally with the inner part, and the part provided integrally with the standing part. An outer portion provided outside the pickup frame; and a fixing portion provided on the outer portion and serving as an attachment portion to another member, and at least one of main plane portions of the pickup cover coupled to the pickup frame. 4. The optical disc apparatus according to claim 1, wherein a convex portion is provided on the portion. 5. The optical disc apparatus according to claim 1, wherein a convex portion provided on a main flat surface portion of the pickup cover is on an upper cover side constituting the cover. The convex portion provided on the main plane portion of the pickup cover has an elongated shape in a direction parallel to the main plane portion of the pickup cover, and the minor axis direction is substantially parallel to the radial direction of the optical disc when the optical disc is mounted. The optical disc apparatus according to claim 1, wherein: The pick-up module has a spindle motor, and the convex part provided in the main plane part of the pick-up cover exists in the vicinity of the spindle motor. Optical disk device. The pickup frame constituting the pickup module includes an inner part provided inside the pickup frame, a standing part provided integrally with the inner part, and the part provided integrally with the standing part. An outer portion provided outside the pickup frame; and a fixing portion provided on the outer portion and serving as an attachment portion to another member, and at least one of main plane portions of the pickup cover coupled to the pickup frame. 4. The optical disk apparatus according to claim 3, wherein another member is attached to the portion. 4. The optical disc apparatus according to claim 3, wherein the separate member attached to the main flat portion of the pickup cover is on an upper cover side constituting the cover. The separate member attached to the main plane portion of the pickup cover has an elongated shape in a direction parallel to the main plane portion of the pickup cover, and the minor axis direction is substantially parallel to the radial direction of the optical disc when the optical disc is loaded. The optical disk device according to claim 3, wherein The pick-up module has a spindle motor, and another member attached to the main plane portion of the pick-up cover is in the vicinity of the spindle motor. The optical disk device described.

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