JP4285076B2 - Optical disk device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is suitably mounted on an electronic device such as a stationary computer, and particularly preferably an optical disk device suitably mounted on a mobile electronic device such as a mobile computer (such as a notebook personal computer), a digital camera, or an electronic notebook. About.
[0002]
[Prior art]
A conventional optical disc apparatus with a built-in computer main body has a structure in which the entire apparatus is housed in a housing, and is generally mounted by incorporating it into the space of the computer main body. The mounting part was in the case and was attached to the computer body here.
[0003]
Hereinafter, a method for attaching a conventional optical disk apparatus to a portable electronic device will be described with reference to the drawings.
[0004]
FIG. 9 is a perspective view showing a configuration of a conventional optical disc apparatus with a built-in portable electronic device. 1 is an optical pickup, 2 is a main shaft, 3 is a sub shaft, 4 is a spindle motor, 5 is a base, 6 is a pickup module (PUM), 7 is a tray, 8 is a carriage, 9 is a rail, 10 is a housing, 11 Is an optical disk device, 12 is a mounting screw hole on the optical disk device side, 13 is a circuit board constituting a control circuit, etc., and 14 is a frame (viewed from the back side of the disk mounting portion).
[0005]
FIG. 10 is a diagram showing a method of attaching a conventional portable electronic device built-in type optical disc apparatus 11 to a portable electronic device. 15 is a portable electronic device, 16 is an attachment interposed for attachment, and 17 is an attachment side attachment hole.
[0006]
In FIG. 9, the optical pickup 1 reads and writes data on a disk attached to the spindle motor section while moving in the radial direction of the spindle motor 4 with the main shaft 2 and the sub shaft 3 as guides. The main shaft 2 and the sub shaft 3 are attached to the base 5 and form a pickup module 6 as a whole. The pickup module 6 is fixed to the tray 7. The tray 7 is slid with respect to the housing 10 by the rail 9. The tray 7 is pulled out from the housing 10 when the optical disk is attached / detached, and is stored in the housing 10 when reading / writing data. The circuit board 13 constituting the control circuit or the like is attached to at least one of the tray 7 and the housing 10. With the above configuration, the portable electronic device built-in type optical disc apparatus 11 is formed as a whole.
[0007]
In FIG. 10, the housing 10 of the main body of the optical disk apparatus 11 is provided with a mounting screw hole 12 on the optical disk apparatus side to be attached to the computer main body. The portable electronic device 15 has an attachment 16 interposed for attachment. The optical disk is mounted by screwing between the attachment-side attachment hole 17 and the attachment screw hole 12 on the optical disc apparatus side and attaching the attachment 16 to the portable electronic device 15. The apparatus 11 is mounted and fixed.
[0008]
In the conventional disk device, as described above, the housing 10 functions to position the tray 7 on which the pickup module 6, the spindle motor 4 and the like are mounted via the rail 9, and the optical disk device 11 is a portable electronic device. 15 was fixed. The thinning of the optical disk device 11 has basically been dealt with by this structure.
[0009]
As prior examples, there are (Patent Document 1), (Patent Document 2), and the like.
[0010]
[Patent Document 1]
JP-A-8-171786 [Patent Document 2]
Japanese Patent Laid-Open No. 7-201044
[Problems to be solved by the invention]
However, in the conventional configuration, while the portable electronic device is increasingly required to be thin and light, the optical disk device itself is required to be thin and light. In particular, there is a high demand for weight reduction in the optical disc apparatus, and it is very difficult to reduce the weight in the above configuration.
[0012]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described conventional problems, and to provide an optical disc apparatus that can be reduced in size, particularly reduced in weight.
[0013]
[Means for Solving the Problems]
The present invention includes a frame having a fixed portion of the electronic device, an optical pickup module fixed to the frame, the disk mounting surface disposed opposite relative to said pick-up module, forms a control circuit the A first circuit board and a second circuit board fixed to a frame; a connection means for connecting the first circuit board and the second circuit board; a spindle motor for rotating an optical disk; and an objective lens. A carriage that is mounted and moves in a radial direction of the optical disc, and a cover that covers a part of the second circuit board and the carriage , wherein the first circuit board and the second circuit board are Adjacent to the pickup module and arranged on the left and right with a straight line connecting the spindle motor and the objective lens as a boundary, the connection means , Characterized in that it is arranged to cover at least a part of the cover.
[0014]
As a result, it is possible to fix the components of the optical disk device without using the housing, to fix the optical disk device to the electronic device body, and to reduce the outer shape when the disk mounting surface is viewed from the front. Therefore, the optical disk device can be significantly reduced in size and weight, and the electronic device main body can be reduced in size and weight.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, a frame provided with a fixing portion for an electronic device, an optical pickup module fixed to the frame, and a control circuit is formed on the side opposite to the disk mounting surface with respect to the pickup module. The first circuit board and the second circuit board fixed to the frame, connection means for connecting the first circuit board and the second circuit board, a spindle motor for rotating the optical disk, and an objective lens are mounted. A carriage that moves in the radial direction of the optical disk, a cover that covers a part of the second circuit board and the carriage , the first circuit board and the second circuit board are adjacent to the pickup module, and The straight line connecting the spindle motor and the objective lens is arranged on the left and right respectively, and the connection means is arranged to cover at least a part of the cover. By Rukoto, conventionally was required casing becomes unnecessary, since it is possible to reduce the outer shape when viewed disk mounting surface from the front, a large reduction in the size of the optical disc apparatus, light weight, and an electronic device body Can be reduced in size and weight. In addition, since the first circuit board and the second circuit board are respectively disposed on the left and right with a straight line connecting the spindle motor and the objective lens as a boundary, the optical disk apparatus can be reduced in size while being reduced in size. The shape of the frame can be matched to the shape of the electronic device on which the optical disk device is mounted, and the mounting property to the electronic device can be improved.
[0034]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0035]
(Embodiment 1)
FIG. 1 is a perspective view of the optical disk apparatus according to an embodiment of the present invention from which the cover and the connecting means are removed and viewed from the back side, and FIG. 2 is a perspective view of the optical disk apparatus according to the embodiment of the present invention as viewed from the front surface. is there. 3 is a diagram showing the configuration of the optical system of the optical disk apparatus according to one embodiment of the present invention, FIG. 4 is a perspective view of the optical disk apparatus according to one embodiment of the present invention as viewed from the back, and FIG. 5 is the present invention. FIG. 6 is a detailed view of a fixing unit and a fixing method of the optical disk device according to the embodiment of the present invention, and FIG. 7 is a diagram of another optical disk device according to the embodiment of the present invention. FIG. 8 is a diagram showing an example of the arrangement of the drive eject switch of the optical disc apparatus according to the embodiment of the present invention.
[0036]
1 and 2, reference numeral 18 denotes a frame for holding each part. The frame 18 is made of modified polyphenylene oxide, ABS resin, polycarbonate, ABS resin and polycarbonate mixture, polybutylene terephthalate, polyoxymethylene, liquid crystal polymer, polyphenylene. A resin material such as sulfide, polystyrene, polyacetal, polyamide, or the like, or a resin material obtained by adding an inorganic substance such as glass or alumina to the resin material or a conductive resin material is used. In particular, modified polyphenylene oxide or a mixture of modified polyphenylene oxide and inorganic fiber or powder is preferable as the material of the frame 18, and by using these materials, rigidity can be increased, warpage can be prevented, and weight reduction can be further promoted. it can.
[0037]
In the present embodiment, the frame 18 is integrally formed of a single type of resin material, but other members are partially used, or a plurality of members made of different materials are arranged in a plane, The frame 18 may be configured by mechanically connecting these members or bonding them with an adhesive or the like. Furthermore, as described above, the frame 18 may be formed by bonding members made of the same material to each other. May be configured.
[0038]
Further, the frame 18 may be laminated by using a technique such as bonding a plurality of members (the same material or different materials) in the thickness direction. For example, the frame 18 may be configured by sandwiching a metal plate or ceramic plate having high rigidity between a pair of plate-shaped resin plates.
[0039]
Further, when the frame 18 is mainly composed of resin, a member capable of increasing rigidity such as a plate-shaped piece, a linear metal, or a ceramic material is dispersed in the resin, so that the frame 18 itself is lightweight. It is also possible to increase the rigidity while reducing the size.
[0040]
As described above, the frame 18 has the above-described configuration or is combined with the above-described configuration to achieve rigidity and weight reduction.
[0041]
The frame 18 has a through hole 18a, and a pickup module 19 is inserted therein. The frame 18 is provided with a raised portion 18c raised from the front surface 18b toward the front surface 18b from the back surface 18d. The pickup module 19 is inserted into the through hole 18a from the back surface 18d, but the raised portion 18c covers the end of the pickup module 19 and is provided outside the maximum diameter of the disk to be loaded with the disk. Thereby, a thickness can be given to a part of the outer periphery of the through-hole 18a of the frame 18 without interfering with the disk when the disk is mounted, and it can be strengthened. Specifically, as shown in FIG. 2, the mechanical strength can be increased by making the thickness L1 of the side portion 18e of the raised portion 18c thicker than the thickness L2 of the side portion 18f in the vicinity of the raised portion 18c. The side portion 18e of the raised portion 18c is provided integrally with the top portion 18g. That is, the raised portion 18c is composed of at least a side portion 18e and a top portion 18g. Moreover, the thickness L1 of the side part 18e is thicker than the thickness L3 of the top part 18g. In order to enhance the mechanical strength, it is desirable to make more than half of the side portion 18e constituting the raised portion 18c thicker than the thickness L2 of the side portion 18f near the side portion 18e. Further, the inner end portion 18h of the top portion 18g has an arc shape and constitutes a part of the through hole 18a. The top 18g is provided with one or a plurality of through holes 18i for weight reduction. Further, when the frame 18 is configured, considering the productivity and the like, if the through hole 18i is not provided, the structure becomes simple and the frame 18 can be easily manufactured. It is preferable that the hole 18i is not provided.
[0042]
Further, the surface 18b of the frame 18 is provided with a disk take-out recess 18j that makes it easy to put a finger between the disk and the frame 18 when the attached disk is removed. The range of the disk take-out recess 18j is set to 22 mm to 55 mm in the radial direction D from the axis center of the spindle motor 19e, and the depth of 12 mm to 26 mm in the circumferential direction is set to 1 mm to 2.5 mm. This facilitates the operation of taking out the small-diameter type disk.
[0043]
In the frame 18 configured as described above, the weight can be suppressed to 15 g or less while maintaining the strength, and the optical disc apparatus can be reduced in weight.
[0044]
Next, the optical pickup unit 19 will be described. The spindle motor 19e is attached to the frame 18 with screws or the like through the bottom plate 19d. The part of the spindle motor 19e where the disk is mounted protrudes from the through hole 19c of the cover 19b toward the surface 18b of the frame 18.
[0045]
The carriage 20 is movably held by two substantially parallel shafts 19f and 19g fixed to the frame 18.
[0046]
The motor 21 is fixed to the frame 18 and rotates a rotating shaft 21b rotatably attached to the frame 18 via a gear group 21a. The rotating shaft 21b is provided in the vicinity of the shaft 19f, and is mounted substantially parallel to the shaft 19f. Moreover, the rotary shaft 21b is provided on the opposite side of the shaft 19g with respect to the shaft 19f. The rotating shaft 21b is provided with a spiral groove and is fitted with a guide 20a provided on the carriage 20. As the rotary shaft 21b rotates, the guide 20a and the carriage 20 move in both directions (arrow A shown in FIG. 1) along the shafts 19f and 19g. As described above, the motor 21, the rotating shaft 21b, and the gear group 21a as means for moving the carriage 20 are stored together on the opposite side of the shaft 19g with respect to the shaft 19f.
[0047]
In the cover 19b on the frame 18, the range substantially opposite to the range in which the carriage 20 moves is raised in a direction away from the carriage 20 with respect to the range not substantially opposite to the range in which the carriage 20 moves. Is formed. The height of the raised portion 19 h is set so as not to interfere with the carriage 20 in the movement range of the carriage 20. As a result, a step is generated between the raised portion 19h of the cover 19b and the other portion, so that the cover 19b is strengthened. Therefore, even if the cover 19b is thinned, a decrease in strength can be minimized.
[0048]
In the present embodiment, the pickup unit is configured directly on the frame 18. However, a pickup module in which the pickup unit is configured on another frame may be formed, and the pickup module may be attached to the frame 18.
[0049]
The carriage 20 is configured by die-casting a metal material or the like, and is mounted with an optical system that reads and writes a disk. The configuration of the optical system mounted on the carriage 20 will be described with reference to FIG.
[0050]
The DVD laser light emitted from the DVD semiconductor laser 20b that emits laser light having a wavelength of 677 nm or less is reflected by the reflecting mirror 20c to change the optical path, and then enters the collimating lens 20d to become parallel light. The parallel laser light passes through the prism 20e, changes the optical path by the rising prism 20f, passes through the quarter-λ plate 20g, converges by the objective lens 20h, and irradiates the disk 20i. The reflected light from the disk 20i passes through the objective lens 20h and the 1 / 4λ plate 20g, changes its direction with the rising prism 20f and the prism 20e, converges with the collimating lens 20j, enters the laminated prism 20k, and changes its direction. It enters the sensor 20l.
[0051]
On the other hand, the CD laser light emitted from the CD semiconductor laser 20m emitting laser light having a wavelength of 765 nm to 795 nm passes through the laminated prism 20k, enters the collimating lens 20j, becomes parallel light, and enters the prism 20e. The direction is changed by the prism 20e and the rising prism 20f, the light passes through the ¼λ plate 20g, converges by the objective lens 20h, and irradiates the disk 20i. The reflected light from the disk 20i passes through the objective lens 20h and the 1 / 4λ plate 20g, changes its direction with the rising prism 20f and the prism 20e, converges with the collimating lens 20j, enters the laminated prism 20k, and changes its direction. It enters the sensor 20l.
[0052]
The rising prism 20f, the 1 / 4λ plate 20g, and the objective lens 20h are configured on the actuator 22. The actuator 22 is attached to the carriage 20 via a damper 22a. The actuator 22 includes an actuator coil 22b. The actuator coil 22b dynamically corrects the movement of the laser beam on the disk to move the actuator 22, and the objective lens 20h is moved to correct the position of the laser beam.
[0053]
The objective lens 20h faces the surface 18b side of the frame, and the entire movable range exists within the range of the through hole 19c.
[0054]
The circuit board is divided into a first circuit board 23 and a second circuit board 24. The first circuit board 23 has a polygonal shape, and the second circuit board 24 has a polygonal shape. . The first circuit board 23 constitutes a circuit that performs signal control of laser light mainly for reading from and writing to the disk. The second circuit board 24 constitutes a circuit that mainly controls the spindle motor 19e, the motor 21 that moves the carriage 20, and the actuator 22.
[0055]
Further, the first circuit board 23 and the second circuit board 24 are respectively fixed to the back surface 18d opposite to the side on which the disk of the frame 18 is mounted, and the spindle motor 19e and the objective lens 20h are connected. They are provided on the left and right with a straight line as the boundary. In this way, the circuit board for controlling the optical disk apparatus is divided into two and fixed to the frame 18, so that the shape of the optical disk apparatus, that is, the shape of the frame 18 can be changed to an arbitrary shape suitable for an electronic device on which the optical disk apparatus is mounted It is possible to improve the mounting property to the electronic device.
[0056]
In this embodiment, the circuit board is divided into two parts, but it may be divided into three parts or more.
[0057]
The first circuit board 23 is adjacent to the optical pickup unit 19 on the back surface 18d side of the frame 18, and is attached to the shaft 19f side with respect to the spindle motor 19e. The first circuit board 23 has a plurality of notch-shaped locking portions 23d on the end side, and is locked with a plurality of hook-shaped locking portions 18k provided on the end side of the frame 18, and further includes screws. The fixing portion is fixed to the frame 18 by screwing. The locking portion 18k is integrally formed with the frame 18. However, the locking portion 18k or a part including the locking portion 18k is formed of another member of the same material or different material, and is screwed to a predetermined position of the frame 18. Alternatively, it may be attached mechanically by welding or shape fitting, or may be attached by bonding with an adhesive or the like. Two connectors 23 a and 23 b are attached to the first circuit board 23, and the long sides of the connectors 23 a and 23 b are arranged substantially in parallel with the respective sides of the first circuit board 23. Both cable insertion portions of the connectors 23a and 23b face the outside of the board. The long side of the connector 23b is attached substantially in parallel to the one side 23c facing the optical pickup portion 19 of the first circuit board 23.
[0058]
The second circuit board 24 is adjacent to the optical pickup unit 19 on the back surface 18d side of the frame 18, and is attached to the shaft 19g side with respect to the spindle motor 19e. Further, the second circuit board 24 is fixed to the frame 18 by locking with a plurality of hook-shaped locking portions 181 on the end side of the frame 18 and further screwing the screwing portions. The locking portion 18l is integrally formed with the frame 18, but the locking portion 18l or a part including the locking portion 18l is made of another member of the same material or different material, and is screwed to a predetermined position of the frame 18 Alternatively, it may be attached mechanically by welding or shape fitting, or may be attached by bonding with an adhesive or the like.
[0059]
Four connectors 24b, 24c, 24d, and 24e are attached to the second circuit board 24, and the long sides of the connectors 24b and 24c are arranged substantially in parallel with the respective sides of the second circuit board 24. Yes. The long side of the connector 24b is attached substantially parallel to the one side 24f facing the optical pickup portion 19 of the second circuit board 24. The cable insertion portion of the connector 24b faces the inside of the board, and the cable insertion portion of the connector 24c faces the outside of the board. The connector 24b is connected to the carriage 20 via connection means (not shown) such as a flat cable or a flexible substrate. The connector 24d is connected to a motor 21 that moves the carriage 20 via connection means (not shown) such as a flat cable or a flexible substrate. The connector 24e is disposed on the back surface of the second circuit board 24 (the surface opposite to the surface on which the connectors 24b, 24c, and 24d are disposed), and is connected to a flat cable, a flexible substrate, or the like (not shown). Is connected to the spindle motor 19e.
[0060]
It is also possible to configure the circuit of the first circuit board 23 and the circuit of the second circuit board 24 on one board so that one circuit board is provided. In this case, since no connection means for connecting the substrates is required, a more inexpensive configuration can be achieved.
[0061]
Further, it is possible to use one or a plurality of circuit boards as the circuit boards, and to fit these in or near the diameter of the disk. In this case, the area viewed from the front of the optical disk apparatus on which the disk is mounted can be minimized.
[0062]
The solenoid 25 is involved in the disk ejecting operation, and is fixed to the back surface 18d side of the frame 18 between the first circuit board 23 and the optical pickup unit 19.
[0063]
A cover 26 is attached to the back surface 18 d side of the frame 18 so as to cover the optical pickup unit 19 and the second circuit board 24. If there is a separate method for shielding the second circuit board 24, the cover 26 need not shield the second circuit board 24. A part of the cover fixing portion 26a that fixes the cover 26 to the frame 18 is in direct contact with the ground portions of the first circuit board 23 and the second circuit board 24 or via a spring, and is screwed. Thus, the cover 26 is fixed and grounded, and the first circuit board 23 and the second circuit board 24 are fixed.
[0064]
The cover 26 is provided with a plurality of through holes 26b for avoiding interference with a part of the components constituting the optical pickup unit 19 or for weight reduction. A through hole for weight reduction can be omitted. In addition, the cover 26 is provided with a protruding portion 26 c that is pushed away from the second circuit board 24 in a range substantially facing the second circuit board 24. The protruding portion 26 c covers the connector 24 b on the second circuit board 24.
[0065]
The first circuit board 23 and the second circuit board 24 are connected by the connecting means 27 connected to the connector 23 b on the first circuit board 23 and the connector 24 b on the second circuit board 24. The connecting means 27 is disposed so as to cover at least part of the cover 26. The connecting means 27 is preferably a flat belt such as a flat cable or a flexible substrate in order to reduce the thickness of the optical disk apparatus. The connection means 27 connected to the connector 24b on the second circuit board 24 is folded back so as to bypass the end of the cover 26 in the vicinity of the connector 24b and pulled out to a position covering the cover 26. When the linear connection means cannot be used due to the positional relationship between the connector 23b on the first circuit board 23 and the connector 24b on the second circuit board 24, the connection means curved according to the connector positional relationship can be used. Wire connection can be made without hindering thinning of the optical disk device. Further, by providing the straight and flat strip connecting means 27 with a bent portion 27a, the connector 23b on the first circuit board 23 and the connector 24b on the second circuit board 24 can be obtained by an inexpensive linear connecting means. It becomes possible to correspond to the positional relationship of. The bent portion 27a is provided in the vicinity of at least one of the vertical bisector B of the long side of the connector 23b and the vertical bisector C of the long side of the connector 24b, thereby twisting the surface of the flat belt-like connecting means 27. And floating can be reduced. Further, the bent portion 27a is bent evenly, so that the contact portions with the connectors at both ends of the flat strip connecting means 27 are on the same side of the flat strip flat surface. It can be used for flat cable connectors. For example, FIG. 4 shows an example of two-fold bending. The flat strip-like connecting means 27 coming out of the connector 23b on the first circuit board 23 is bent at the bent portion 27a and once divided into the vertical bisect of the long side of the connector 23b. With respect to the line B, it is pulled out on the side opposite to the connector 24b, bent again at the bent portion 27a, and pulled out toward the connector 24b.
[0066]
A fixing means 27 b is used to fix the flat belt-like connecting means 27 to the cover 26. As the fixing means 27b, a method of fixing the connection means 27 to the cover 26 using an adhesive tape, or a flexible member as the fixing means 27b is joined to the cover with an interval, and between the joints. A method of detachably fixing through the connecting means 27 is preferable. It is also possible to bond the double-sided tape between the connecting means 27 and the cover 26.
[0067]
A through hole 18m is provided in the vicinity of the portion of the frame 18 facing the first circuit board 23, and push button switches 23f and 23g arranged on the first circuit board 23 pass through the through hole 18m. Projecting from the surface 18 b of the frame 18. The movable directions of the push button switches 23 f and 23 g are substantially perpendicular to the surface of the first circuit board 23. Since the through hole 18m also has the purpose of reducing the weight of the frame 18, the dimension of the through hole 18m is determined including the required weight reduction.
[0068]
The push button switches 23f and 23g detect the open / close state of the openable / closable cover 26 attached to the portable electronic device, but it is also possible to send the detected signal to the portable electronic device. . Further, the push button switches 23f and 23g can be provided on the surface 18b of the frame 18.
[0069]
Further, the frame 18 has another through-hole 18n, and a part of the solenoid 25 is exposed when viewed from the surface 18b side of the frame 18.
[0070]
A brake 28 for stopping the rotation of the disk is provided on the surface 18b of the frame 18 as necessary. The brake 28 includes a case 28a, a movable portion 28b, a pad 28c, and a spring 28d. The case 28 a is molded integrally with the frame 18, but may be formed of another member made of the same material as or different from the frame 18 and attached to a predetermined position of the frame 18. In FIG. 5, the moving shaft 28e of the movable portion 28b passes through the rotation center of the spindle motor 19e, and the movable range is restricted by the case 28a. The spring 28d is set so as to push the movable part 28b toward the radial center of the spindle motor 19e. The pad 28c is provided on the surface of the movable portion 28b that faces the center of the spindle motor 19e in the radial direction, and is made of a material having a high coefficient of friction with the disk material such as silicon rubber and felt. The surface of the pad 28c in contact with the disk has an inclination of an angle θ on a surface parallel to the disk with respect to the vertical surface 28f of the moving shaft 28e. As a result, even when the outer shape of the disk varies, the amount of contraction of the spring 28d when the pad 28c is in contact with the disk is constant, and the pressing force of the pad 28c on the disk is constant. Specifically, the assumed variation width of the outer shape of the disk is 0.3 mm to 0.6 mm. The inclination amount θ and the width G of the surface of the pad 28c in contact with the disk are set so as to correspond to the assumed variation width of the disk diameter. The movable range of the movable portion 28b and the pad 28c is set from 58.5 mm to 61.5 mm at a distance F from the center of the spindle motor 19e to the center of the surface of the pad 28c, and G is set from 4 mm to 10 mm. The spring 28d is set so that a disk with a diameter of 120 mm is mounted and when the pad 28c hits for braking, a predetermined load (for example, about 10 g weight) is applied to the disk from the pad 28c. With such a setting, the rotation of the disk having a diameter of 120 mm can be sufficiently stopped. Further, the dimension H in the disk thickness direction of the surface of the pad 28c in contact with the disk is set to 4 mm to 10 mm. As a result, the side surface of the disk can be reliably brought into contact with the pad 28c when the disk is stopped, including backlash in the thickness direction of the disk when the disk is loaded and warping within the disk specifications. The movable portion 28b is provided with an inclined surface 28z, and the movement of the movable portion 28b in the radial direction of the spindle motor 19e can be obtained by pushing the vertical surface 28f with an extruding rod. Specifically, a push bar is provided on the movable disk cover for taking out the disk of the portable electronic device. By closing the movable disk cover, the push bar pushes the inclined surface 28z, and the movable part 28b moves away from the disk 28g to release the brake. To do.
[0071]
The optical disk device fixing portion 29 protrudes from the side portion 18e of the frame 18 or the side portion 18f near the raised portion, or enters the inside of the frame 18 from the side portion 18e of the frame 18 or is provided in the plane of the frame 18. Yes.
[0072]
The optical disk device fixing portion 29 is provided integrally with the frame 18, but the optical disk device fixing portion 29 or a portion including the optical disk device fixing portion 29 is formed by another member of the same material or different material, and a predetermined position of the frame 18 is formed. It may be attached mechanically by screwing, welding or shape fitting, or may be attached with an adhesive or the like.
[0073]
Further, it is preferable to provide about 2 to 10 optical disk device fixing portions 29, and it is particularly preferable to provide about 4 to 8. If the number of the optical disk device fixing portion 29 is one, it is difficult to attach with sufficient strength, and if it is more than ten, it takes time to attach and the productivity may be lowered.
[0074]
For example, as shown in FIG. 2D, the shape of the optical disk device fixing portion 29 includes a land 29a projecting substantially parallel to the surface 18b of the frame 18 from the side portion 18e of the frame 18 or the side portion 18f near the raised portion, and the frame The hole 29b is substantially perpendicular to the 18th surface. Alternatively, as shown in FIG. 2E, a land 29c that enters from the side portion 18e of the frame 18 or the side portion 18f near the raised portion substantially parallel to the surface 18b of the frame 18 and a hole 29d that is substantially perpendicular to the surface of the frame 18 Composed. The shape of the optical disk device fixing portion 29 is a flat plate protruding substantially perpendicular to the surface 18b of the frame 18 as shown in FIG. 2D, and a hole is provided in the flat plate so that the fixing portion of the portable electronic device is opposed to the flat plate. It is also possible to attach to.
[0075]
As shown in FIG. 6, an anti-vibration damper 30 is sandwiched between the optical disc device fixing portion 29 and the fixing portion 31 of the portable electronic device to which the optical disc device is attached. The vibration damper 30 is made of an elastic material, and specifically, butyl rubber or silicon rubber is preferable. When the optical disk device fixing portion 29 is U-shaped as shown in FIG. 6A, a groove 30 a is provided on the side surface of the vibration damping damper 30 and is fitted to the optical disk device fixing portion 29. FIG. 6B shows a cross-sectional view of the state in which the optical disk device fixing portion 29 and the vibration damping damper 30 shown in FIG. 6A are attached to the fixing portion 31 of the portable electronic device. A protrusion 31 a is provided on the fixing portion 31 of the portable electronic device and is fitted into the through hole 30 b of the vibration damping damper 30. A screw 31b attached to the protrusion 31a serves to prevent the vibration damping damper 30 from falling off. In this manner, there is no portion in which the optical disk device fixing portion 29 and the fixing portion 31 of the portable electronic device are in direct contact.
[0076]
Further, when the optical disk device fixing portion 29 is constituted by a through hole 30d as shown in FIG. 6C, the vibration damping damper 30 is divided into two members, provided with a protrusion 30c on one side, and fitted with the protrusion 30c on the other side. A through hole 30d to be fitted is provided, and the optical disk device fixing portion 29 is sandwiched and fitted.
[0077]
Further, as shown in the cross-sectional view of FIG. 6D, no protrusion is provided on the fixing portion 31 of the portable electronic device, and the vibration damper 30 is directly fixed to the fixing portion 31 of the portable electronic device with a screw 31b. It is also possible.
[0078]
Providing at least one portion of the optical disk device fixing unit 29 in the vicinity of the optical pickup unit 19 is effective in preventing vibration of the optical pickup unit 19.
[0079]
In the figure which shows another structure of the optical disk apparatus in one embodiment of this invention of FIG. 7, the other structure of the fixing method of a circuit board is shown. As in the example of FIG. 1, the shaft is fixed to the frame 18, the carriage is movably fixed to the shaft, the optical pickup is configured on the carriage, the driving means for driving the carriage, and the disk fixed to the frame 18 is rotated. And a circuit board that forms a control circuit fixed to the frame 18. The frame 18 is provided with an optical disk device fixing portion 29 for other members. The circuit board 32 configures the circuits of the first circuit board 23 and the second circuit board 24 in the example of FIG. 1 on one circuit board. The first circuit board 23 has at least one of shafts 21b, 19f, a carriage 20, a driving means for driving the carriage 20, and a rotating means for rotating a disk fixed to the frame 18, and at least the circuit board on the back side of the frame 18. Are partially overlapped in the thickness direction of the frame 18. In particular, in the present embodiment, the outer periphery of the first circuit board 23 is within the outer periphery of the frame 18. The first circuit board 23 is arranged so that the board and components on the board do not come into contact with other components in the frame 18. The first circuit board 23 is fixed to the frame 18 by locking with a locking portion 18k and screwing. With such a configuration, the maximum dimension in the thickness direction is increased compared to the example of FIG. 1, but the maximum dimension when the disk mounting surface is viewed from the front can be reduced, and the circuit board provided in the frame can be reduced. Since the mounting portion can be made small, it is possible to reduce the weight significantly. The circuit board may be divided into a plurality of parts, and a part of the board is fixed to the shaft 21b, 19f, the carriage 20, the driving means for driving the carriage 20, and the frame on the back side of the frame 18. At least one of the rotating means for rotating the disk and at least a part of the circuit board may be overlapped.
[0080]
In addition, with such a configuration, the outer shape when the disc mounting surface is viewed from the front is a circular outer shape equivalent to a 12 cm disc, or a substantially square shape with a side of about 12 cm. A lightweight optical disk device can be provided.
[0081]
FIG. 8 is a diagram showing an example of the arrangement of drive eject switches in the present embodiment. In order to take out the disc, the drive eject switch 33 provided in the portable electronic device 15 is operated. As a result, the movable disk cover 34 provided in the computer main body is opened, and a control operation such as ending the running application or stopping the spindle motor is performed. In the prior art, the drive eject switch 33 is provided on the optical disc apparatus 11 side. However, by attaching the drive eject switch 33 not to the optical disc apparatus 11 but to the portable electronic device 15 main body, the drive eject switch 33 is provided. Since the mechanism for holding 33 can be omitted from the optical disk device 11 side, the size can be reduced, and the entire computer can also be reduced in size.
[0082]
In addition, lead-free materials are used for the members constituting the optical pickup and the bonding materials for the members, the electronic components constituting the circuit board, the bonding materials for the electronic components, and the bonding materials for the members and members mounted on the frame. As a result, a lead-free product can be provided as a device.
[0083]
In the optical disk apparatus configured as described above, the components of the optical disk apparatus can be fixed without using a conventional housing, and the optical disk apparatus can be fixed to the electronic device main body. Therefore, the optical disk device can be significantly reduced in size and weight, and the electronic device main body can be reduced in size and weight.
[0084]
Note that the optical disk device of the present embodiment can be attached not only to portable electronic devices but also to fixed electronic devices.
[0085]
The optical disc apparatus as shown in the above example can realize 135 g or less (preferably 120 g or less, more preferably 100 g or less). By mounting such an optical disc apparatus on an electronic device, the electronic device itself can be downsized. I can do it.
[0086]
The optical disc apparatus according to an embodiment of the present invention is particularly useful in a configuration in which a disc having a diameter of 110 mm to 130 mm can be mounted.
[0087]
【The invention's effect】
A frame, an optical pickup module fixed to the frame, and a circuit board forming a control circuit fixed to the frame, the circuit board being disposed on the opposite side of the disk mounting surface with respect to the pickup module In addition, at least a part of the circuit board is disposed so as to overlap with at least a part of the pickup module in the thickness direction of the frame, and the frame is provided with a fixing portion to another member, whereby the casing is provided. The components of the optical disk device can be fixed without being used, and the optical disk device can be fixed to the main body of the electronic device, and the outer shape when the disk mounting surface is viewed from the front can be reduced. A significant reduction in size and weight of the device and a reduction in size and weight of the electronic device main body are achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view of an optical disc apparatus according to an embodiment of the present invention with a cover and a connecting means removed and viewed from the back side. FIG. 2 is a perspective view of the optical disc apparatus according to an embodiment of the present invention as viewed from the front. FIG. 3 is a diagram showing a configuration of an optical system of an optical disc apparatus according to an embodiment of the present invention. FIG. 4 is a perspective view of the optical disc apparatus according to an embodiment of the present invention as viewed from the back. FIG. 6 is a front view of an optical disc device according to an embodiment. FIG. 6 is a detailed view of a fixing portion and a fixing method of the optical disc device according to an embodiment of the invention. FIG. 8 is a diagram showing an example of the arrangement of drive eject switches of the optical disc apparatus according to the embodiment of the present invention. FIG. 9 is a diagram of a conventional optical disc apparatus with a built-in portable electronic device. Figure [EXPLANATION OF SYMBOLS] showing the installation in a portable electronic device in perspective view FIG. 10 conventional portable electronic device built-in type optical disk device showing the formation
DESCRIPTION OF SYMBOLS 1 Optical pick-up 2 Main shaft 3 Sub shaft 4 Spindle motor 5 Base 6 Pick-up module 7 Tray 8 Carriage 9 Rail 10 Case 11 Optical disk apparatus 12 Mounting screw hole 13 on the optical disk apparatus side Circuit board 14 which comprises a control circuit etc. Frame 15 Carrying Electronic equipment 16 Attachment 17 Attachment side mounting hole 18 Frame 18a Through hole 18b Surface 18c Raised portion 18d Back surface 18e Side portion 18f Side portion 18g near raised portion Top portion 18h Inner end portion 18i Through hole 18j Disk take-out recess 18k Locking 18l Locking part 18m Through hole 18n Through hole 18z Inclined part 19 Optical pickup part 19a Bottom plate 19b Cover 19c Through hole 19d Disk mounting part 19e Spindle motor 19f, 19g Shaft 19h Raised part 20 Carrier 20a Guide 20b DVD semiconductor laser 20c Reflective mirror 20d Collimating lens 20e Prism 20f Rising prism 20g 1 / 4λ plate 20h Objective lens 20i Disk 20j Collimating lens 20k Multilayer prism 20l Sensor 20m CD semiconductor laser 21 Motor 21a Gear group 21b Rotation Shaft 22 Actuator 22a Damper 22b Actuator coil 23 First circuit board 23a, 23b Connector 23c One side 23d facing the pickup module of the first circuit board Locking portion 23f Push button switch 23g Push button switch 24 Second circuit board 24b 24c, 24d, 24e Connector 24f One side 25 facing the pickup module of the second circuit board Solenoid 26 Cover 26a Cap -Fixing part 26b Through hole 26c Projection part 27 Connecting means 27a Bending part 27b Fixing means 28 Brake 28a Case 28b Movable part 28c Pad 28d Spring 28e Moving shaft 28f Vertical surface 28g Disk 29 Optical disk device fixing part 29a Land 29b Hole 29c Land 29d Hole 30 Damper 30a for vibration isolation 30b Groove 30b Through hole 30c Protrusion 30d Through hole 31 Fixed part 31a Protrusion 31b Screw 32 Circuit board 33 Drive eject switch 34 Movable disk cover

Claims (1)

A frame provided with a fixing portion for an electronic device, an optical pickup module fixed to the frame, and disposed on the opposite side of the disk mounting surface with respect to the pickup module , forming a control circuit and fixed to the frame The optical disk having the first circuit board and the second circuit board, connection means for connecting the first circuit board and the second circuit board, a spindle motor for rotating the optical disk, and an objective lens. And a cover that covers a part of the second circuit board and the carriage, and the first circuit board and the second circuit board are adjacent to the pickup module. And arranged on the left and right with a straight line connecting the spindle motor and the objective lens as a boundary. Optical disc apparatus characterized by being arranged so as to cover at least a part of the over.

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