JP2004326837A - Optical disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device in which the thickness of the device is reduced and especially the weight of the device is reduced. <P>SOLUTION: The device is provided with a frame 18, an optical pickup module 19 which is fixed to the frame 18 and a circuit board 23 which forms a control circuit fixed to the frame 18. The constituting parts of the optical disk device including a braking means 28 are fixed to the frame 18 without using a housing. Thus, the thickness and the weight of the optical disk device are greatly reduced and the thickness and the weight of an electronic equipment main body are also reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
INDUSTRIAL APPLICABILITY 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 (notebook personal computer, etc.), a digital camera, and an electronic organizer. About.
[0002]
[Prior art]
A conventional optical disk device with a built-in computer body has a structure in which the entire device is housed in a housing, and is generally mounted by incorporating the device into the space of the computer body. The attachment was in the housing, where it was attached to the computer body.
[0003]
Hereinafter, a method of attaching a conventional optical disk device to a portable electronic device will be described with reference to the drawings.
[0004]
FIG. 8 is a perspective view showing the configuration of a conventional optical disk device 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 Denotes an optical disk device, 12 denotes a mounting screw hole on the optical disk device side, 13 denotes a circuit board constituting a control circuit and the like, and 14 denotes a frame (as viewed from the back side of the disk mounting portion).
[0005]
FIG. 9 is a diagram showing a method of mounting the conventional optical disk device 11 with a built-in portable electronic device on the portable electronic device. Reference numeral 15 denotes a portable electronic device, reference numeral 16 denotes an attachment interposed in mounting, and reference numeral 17 denotes an attachment-side mounting hole.
[0006]
In FIG. 8, an optical pickup 1 reads and writes data on a disk attached to a spindle motor while moving in the radial direction of a spindle motor 4 using a main shaft 2 and a sub shaft 3 as guides. The main shaft 2 and the sub shaft 3 are attached to the base 5 to form a pickup module 6 as a whole. Pickup module 6 is fixed to tray 7. The tray 7 slides with respect to the housing 10 by the rail 9. The tray 7 is pulled out of the housing 10 when the optical disk is attached / detached, and is stored in the housing 10 when reading / writing data. Further, a circuit board 13 constituting a control circuit or the like is attached to at least one of the tray and the housing. With the above configuration, the optical disk device 11 of the type with a built-in portable electronic device is formed as a whole.
[0007]
In FIG. 9, a housing 10 of an optical disk device main body 11 is provided with a mounting screw hole 12 to be attached to a computer main body. The portable electronic device 15 has an attachment 16 to be interposed for attachment. A screw is screwed between the attachment side mounting hole 17 and the mounting screw hole 12 on the optical disk device side, and the optical disk is mounted on the portable electronic device 15 by attaching the attachment 16 to the portable electronic device 15. Attach and fix the device.
[0008]
In the conventional disk drive, as described above, the housing 10 functions to position the tray 7 on which the pickup module 6 and the spindle motor 4 and the like are mounted via the rails 9 and to transfer the optical disk to the portable electronic device 15. Had the function of fixing it. Basically, this structure is also used to reduce the thickness of the optical disk device.
[0009]
Prior examples include (Patent Document 1) and (Patent Document 2).
[0010]
[Patent Document 1]
JP-A-8-171786 [Patent Document 2]
JP-A-7-201044
[Problems to be solved by the invention]
However, in the above-described conventional configuration, as portable electronic devices are increasingly required to be thinner and lighter, the optical disk device itself is required to be thinner and lighter. In particular, there has been a high demand for weight reduction in optical disk devices, and with the above-described configuration, weight reduction has been extremely difficult.
[0012]
An object of the present invention is to solve the above-mentioned conventional problems, and to provide an optical disk device capable of realizing a reduction in thickness, particularly, a reduction in weight.
[0013]
[Means for Solving the Problems]
In order to solve such a problem, the present invention provides a frame, an optical pickup module fixed to the frame, a circuit board forming a control circuit fixed to the frame, and a disk fixed to and mounted on the frame. A brake means is provided for contacting the outer periphery, and the brake means is provided so as to be able to contact / non-contact the outer periphery of the disk. Thus, the components of the optical disk device are fixed without using the housing, and the thickness and weight of the optical disk device are significantly reduced, and the thickness and weight of the electronic device body are reduced.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
The invention according to claim 1 includes a frame, an optical pickup module fixed to the frame, a circuit board forming a control circuit fixed to the frame, and an outer periphery of a disk fixed to and mounted on the frame. An optical disc device characterized by being provided with an abutting brake means, wherein the brake means is provided so as to be able to contact / non-contact with the outer periphery of the disk. Thus, it is possible to fix the components of the optical disc device including the optical disc device, thereby achieving a significant reduction in the thickness and weight of the optical disc device and a reduction in the thickness and weight of the electronic device body.
[0015]
The invention according to claim 2 is characterized in that the brake means includes at least one of a contact piece movably provided, an urging means for pressing the contact piece, and a case for accommodating the respective parts. According to the optical disk device of the first aspect, it is possible to provide an optical disk device that is thin, lightweight, and has a sufficient disk brake function.
[0016]
According to a third aspect of the present invention, there is provided the optical disk apparatus according to the second aspect, wherein the case is integrally formed with the frame, and the case is provided so as to protrude from a surface of the frame, which is a disk mounting side. In addition, it is possible to provide an optical disk device having a sufficient disk brake function with excellent assemblability.
[0017]
According to a fourth aspect of the present invention, the case includes a side wall integrally formed with the frame and protruding toward the surface of the frame and surrounding at least three sides, and a top plate provided integrally with the side wall and covering an upper part, and The pickup module side is provided so as to be an opening, and a contact piece is provided so as to close the opening, and the contact piece is held so as to be movable in a direction approaching or moving away from the optical pickup module side. According to the optical disk device of the third aspect, it is possible to provide an optical disk device having an excellent assemblability and a sufficient disk brake function.
[0018]
According to a fifth aspect of the present invention, the optical disc apparatus according to the first aspect of the present invention is characterized in that the brake means is moved by the action of an external member. Can be provided.
[0019]
The invention according to claim 6 is characterized in that an interlocking member is used as an external member by an operation of taking out a disk provided in an electronic device or the like, and the interlocking member acts on the brake means. According to the optical disk device described above, it is possible to provide an optical disk device having a disk braking function linked to the operation of taking out the disk with a simple operation mechanism.
[0020]
According to a seventh aspect of the present invention, the weight of the frame is 15 g or less, and the optical disk device according to the first aspect enables the optical disk device to be reduced in weight, and the mounted device can also reduce the weight. Become.
[0021]
According to an eighth aspect of the present invention, the weight of the optical disk device is 135 g or less, and the optical disk device according to the first aspect can reduce the weight of the attached device.
[0022]
According to the ninth aspect of the present invention, there is provided a joining material for members and members constituting an optical pickup module, a joining material for electronic components and electronic components constituting a circuit board, and a joining material for members and members mounted on a frame. The optical disk device according to claim 1, wherein a lead-free material is used, so that a lead-free product can be provided as the device.
[0023]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0024]
FIG. 1 is a perspective view of an optical disk device according to an embodiment of the present invention as viewed from the front surface, and FIG. 2 is a perspective view of the optical disk device according to the embodiment of the present invention as viewed from the back surface with a cover and connection means removed. (The cover and the flat cable are omitted in FIG. 2). FIG. 3 is a diagram showing a configuration of an optical system of the optical disk device according to one embodiment of the present invention. FIG. 4 is a perspective view of the optical disk device according to one embodiment of the present invention as viewed from the back. FIG. 6 is a front view of an optical disk device according to one embodiment of the present invention, FIG. 6 is a diagram showing another mounting method of the optical disk device according to one embodiment of the present invention, and FIG. 7 is a drive eject of the optical disk device according to one embodiment of the present invention. FIG. 3 is a diagram illustrating an example of an arrangement of switches.
[0025]
In FIGS. 1 and 2, reference numeral 18 denotes a frame for holding each part. The constituent material of the frame 18 is modified polyphenylene oxide, ABS resin, polycarbonate, a mixture of ABS resin and polycarbonate, polybutylene terephthalate, polyoxymethylene, liquid crystal polymer, polyphenylene. It is made of a resin material such as sulfide, polystyrene, polyacetal, or polyamide, a resin material obtained by adding an inorganic substance such as glass or alumina to the resin material, or a resin material having conductivity. In particular, modified polyphenylene oxide or a mixture of modified polyphenylene oxide and inorganic fibers or powder is preferable as the material of the frame 18. By using these materials, rigidity can be increased, warpage can be prevented, and further weight reduction can be achieved. it can.
[0026]
In the present embodiment, the frame 18 is integrally formed of one kind of resin material, but other materials are partially used or a plurality of members formed of different materials are arranged in a plane. The frame 18 may be formed by mechanically connecting the members or by bonding with an adhesive or the like. Further, the members formed of the same material may be connected to each other as described above. May be configured.
[0027]
Further, the frame 18 may be formed by laminating a plurality of members (the same material or different materials) in the thickness direction and laminating them by a method such as bonding. For example, the frame 18 may be configured by sandwiching a highly rigid metal plate or ceramic plate between a pair of plate-shaped resin plates.
[0028]
When the frame 18 is mainly composed of a resin, a member capable of increasing rigidity such as a plate-like piece or a linear metal or a ceramic material is dispersed in the resin, thereby reducing the weight of the frame 18 itself. It is also possible to increase the rigidity while making it possible.
[0029]
As described above, the frame 18 has the above-described configuration or a combination of the above-described configurations, thereby realizing rigidity and weight reduction.
[0030]
The frame 18 has a through hole 18a into which a pickup module 19 is inserted. The frame 18 is provided with a protruding portion 18c protruding from the front surface 18b from the rear surface 18d toward the front surface 18b. 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 mounted. Thus, a part of the outer periphery of the through hole 18a of the frame 18 can be thickened and strengthened without interfering with the disk when the disk is mounted. Specifically, as shown in FIG. 1, the thickness L1 of the side portion 18e of the raised portion 18c is made larger than the thickness L2 of the side portion 18f near the raised portion 18c, so that the mechanical strength can be increased. The side part 18e of the raised part 18c is provided integrally with the top part 18g. That is, the raised portion 18c includes at least the side portion 18e and the top portion 18g. The thickness L1 of the side portion 18e is larger than the thickness L3 of the top portion 18g. Further, it is desirable to make at least half of the side portion 18e constituting the raised portion 18c thicker than the thickness L2 of the adjacent side portion 18f in order to enhance the mechanical strength. The inner end 18h of the top 18g has an arc shape and forms a part of the through hole 18a. One or a plurality of through holes 18i are provided in the top part 18g for weight reduction. Further, when the frame 18 is configured, when the through hole 18i is not provided in consideration of productivity and the like, the structure is simplified, and the frame 18 is easily manufactured. It is preferable that the hole 18i is not provided.
[0031]
The surface 18b of the frame 18 is provided with a disc removal recess 18j that makes it easy to insert a finger between the disc and the frame 18 when removing the attached disc. The range of the disc removal 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 12 mm to 26 mm in the circumferential direction. The depth is set to 1 mm to 2.5 mm. This makes it easy to take out a small-diameter type disk.
[0032]
With the frame 18 configured as described above, the weight can be suppressed to 15 g or less while maintaining the strength, and the optical disk device can be reduced in weight.
[0033]
The pickup module 19 is provided with a frame 19a having a frame shape and a cover 19b attached to the upper surface. The cover 19b is provided with a through hole 19c. The spindle motor 19e is attached to the frame 19a by screws or the like via a bottom plate 19d. The portion 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 19a.
[0034]
The carriage 20 is movably held by two substantially parallel shafts 19f and 19g fixed to a frame 19a.
[0035]
The motor 21 is fixed to the frame 19a, and rotates a rotary shaft 21b rotatably attached to the frame 19a via a gear group 21a. The rotating shaft 21b is provided near the shaft 19 and is mounted substantially parallel to the shaft 19. Moreover, the rotating shaft 21b is provided on the opposite side of the shaft 19g from the shaft 19f. The rotary shaft 21b is provided with a spiral groove, and is fitted with a guide 20a provided on the carriage 20. By the rotation of the rotating shaft 21b, the guide 20a and the carriage 20 move bidirectionally (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 collectively housed on the opposite side of the shaft 19f from the shaft 19f.
[0036]
In the cover 19b of the pickup module 19, a range substantially opposed to the range in which the carriage 20 moves is raised in a direction away from the carriage 20 with respect to a range not substantially opposed to the range in which the carriage 20 moves, and the raised portion 19h Is formed. The height of the raised portion 19h is set so as not to interfere with the carriage 20 in the moving range of the carriage 20. As a result, a step is formed between the raised portion 19h of the cover 19b and the other portion, and the cover 19b is strengthened. Therefore, even if the thickness of the cover 19b is reduced, a decrease in strength can be minimized.
[0037]
The carriage 20 is provided with a frame 20b made of a metal material by die casting or the like, and the frame 20b is equipped with an optical system for reading and writing a disk. FIG. 3 illustrates the configuration of the optical system mounted on the frame 20b.
[0038]
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 reflection mirror 20c to change the optical path, and then enters the collimator lens 20d to become parallel light. The parallel laser light passes through the prism 20e, changes the optical path by the rising prism 20f, converges on the objective lens 20h after passing through the ４λ plate 20g, and irradiates the disk 20i. The reflected light from the disk 20i passes through the objective lens 20h and the ４λ plate 20g, changes its direction by the rising prism 20f and the prism 20e, converges by the collimating lens 20j, enters the laminated prism 20k, and changes its direction. The light enters the sensor 201.
[0039]
On the other hand, the CD laser light emitted from the CD semiconductor laser 20m that emits laser light having a wavelength of 765 nm to 795 nm passes through the laminated prism 20k, enters the collimator lens 20j, becomes parallel light, and enters the prism 20e. The direction is changed by the prism 20e and the rising prism 20f, passes through the 1 / 4λ plate 20g, converges with 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, and is turned by the rising prism 20f and the prism 20e. The light is converged by the lens 20i and is incident on the laminated prism 20k to change the direction. 20l.
[0040]
The rising prism 20 f, the １ ／ λ plate 20 g, and the objective lens 20 h are configured on the actuator 22. The actuator 22 is attached to the carriage 20 via a damper 22a. The actuator 22 has an actuator coil 22b. The actuator coil 22b dynamically corrects the movement of the laser light on the disk, moves the actuator 22, moves the objective lens 20h, and corrects the position of the laser light.
[0041]
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.
[0042]
An attachment portion 19i is provided on a frame 19a of the pickup module 19, and is fixed to the frame 18 via a vibration damper 19j. The vibration damper 19j is made of an elastic material, and specifically, butyl rubber or silicon rubber is used. At least three attachment portions 19i are provided at substantially equal intervals. In particular, providing at least one portion of the mounting portion 19i near the spindle motor 19e is effective in preventing vibration of the spindle motor 19e.
[0043]
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 an arc-shaped notch 24a. It has a polygonal shape. The first circuit board 23 mainly constitutes a circuit for controlling a signal of a laser beam for reading / writing to / from a disk. The second circuit board 24 constitutes a circuit for mainly controlling the spindle motor 19e, the motor 21 for moving the carriage 20, and the actuator 22.
[0044]
Further, the first circuit board 23 and the second circuit board 24 are fixed to the back surface 18d of the frame 18 on the side opposite to the side where the disk is mounted, and further connect the spindle motor 19e and the objective lens 20h. They are provided on the left and right, respectively, with a straight line as the boundary. As described above, the circuit board for controlling the optical disk device is divided into two parts and fixed to the frame 18, so that the shape of the optical disk device, 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 device is mounted. It is possible to improve the mountability to an electronic device.
[0045]
In the present embodiment, the circuit board is divided into two, but may be divided into three or more.
[0046]
The first circuit board 23 is adjacent to the pickup module 19 on the back surface 18d side of the frame 18, and is mounted on the shaft 19f side with respect to the spindle motor 19e. A plurality of notch-shaped locking portions 23d are provided on an end of the first circuit board 23, and are locked with a plurality of key-shaped locking portions 18k provided on the end of the frame 18, and The fixing part is fixed to the frame 18 by screwing. The locking portion 18k is formed integrally with the frame 18. However, the locking portion 18k or a portion including the locking portion 18k is formed of another member of the same material or a different material, and is screwed to a predetermined position of the frame 18. Alternatively, they may be mechanically connected by welding, welding or shape fitting, or may be attached by bonding with an adhesive or the like. Two connectors 23a and 23b are attached to the first circuit board 23, and the long sides of the connectors are respectively 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 parallel to the one side 23c of the first circuit board 23 facing the pickup module 19.
[0047]
The second circuit board 24 is adjacent to the pickup module 19 on the back surface 18d side of the frame 18, and is mounted on the shaft 19g side with respect to the spindle motor 19e. The second circuit board 24 is fixed to the frame 18 by being locked by a plurality of key-shaped locking portions 181 on the end sides of the frame 18 and further by screwing the screwed portions. The locking portion 181 is formed integrally with the frame 18, but the locking portion 181 or a portion including the locking portion 181 is formed of another member of the same material or a different material, and is screwed to a predetermined position of the frame 18. Alternatively, they may be mechanically connected by welding, welding or shape fitting, or may be attached by bonding with an adhesive or the like.
[0048]
Four connectors 24b, 24c, 24d, 24e are attached to the second circuit board 24, and the long sides of the connectors 24b, 24c are respectively arranged substantially in parallel with the respective sides of the second circuit board 24. I have. The long side of the connector 24b is attached substantially parallel to one side 24f of the second circuit board 24 facing the pickup module 19. 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 a connection means (not shown) such as a flat cable or a flexible board. The connector 24d is connected to a motor 21 for moving the carriage 20 via a connection means (not shown) such as a flat cable or a flexible board. 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 provided with a connection means (not shown) such as a flat cable or a flexible substrate. Is connected to the spindle motor 19e via the.
[0049]
The circuit of the first circuit board 23 and the circuit of the second circuit board 24 may be configured on one board, and the number of circuit boards may be reduced to one. In this case, there is no need for a connecting means for connecting the substrates, so that a more inexpensive configuration can be achieved.
[0050]
It is also possible to use one or a plurality of circuit boards, which are accommodated within or near the diameter of the disk. In this case, the area seen from the front of the optical disk device on which the disk is mounted can be minimized.
[0051]
The solenoid 25 is involved in the ejection operation of the disk, and is fixed to the back surface 18d side of the frame 18 between the first circuit board 23 and the pickup module 19.
[0052]
A cover 26 is attached to the back surface 18 d of the frame 18 so as to cover the pickup module 19 and the second circuit board 24. If there is another method for shielding the second circuit board 24, the cover 26 does not need to shield the second circuit board 24. A part of the cover fixing part 26a fixing the cover 26 to the frame 18 is in direct contact with the ground part of the first circuit board 23 and the second circuit board 24 via a spring, and is screwed. Thus, the cover 26 is fixed and grounded, and the circuit board 23 and the second circuit board 24 are fixed.
[0053]
The cover 26 is provided with a plurality of through-holes 26b for avoiding interference with a part of the components constituting the pickup module 19 or for reducing the weight. The through-hole for the formation can be omitted. Further, the cover 26 is provided with a protruding portion 26 c which is pushed out in a direction away from the second circuit board 24 in a range substantially opposed to the second circuit board 24. The protruding portion 26c covers the connector 24b on the second circuit board 24.
[0054]
The first circuit board 23 and the second circuit board 24 are connected by connection means 27 connected to the connector 23b on the first circuit board 23 and the connector 24b on the second circuit board 24. The connection means 27 is arranged so as to cover at least a part of the cover 26. The connecting means 27 is desirably a flat band such as a flat cable or a flexible substrate for reducing the thickness of the optical disk device. 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 near the connector 24b and drawn out to a position covering the cover 26. If a 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 in accordance with the connector positional relation can be used. Wiring can be performed without hindering the thinning of the optical disk device. In addition, by providing the bent portion 27a on the straight and flat strip-shaped connection means 27, the connector 23b on the first circuit board 23 and the connector 24b on the second circuit board 24 can be formed by inexpensive straight connection means. Can be accommodated. 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, so that the surface of the flat strip-shaped connecting means is twisted. Lifting can be reduced. Further, the bent portion 27a is bent even-numbered, so that the contact portions with the connectors at both ends of the flat strip-shaped connection means 27 come to the same side of the flat strip flat surface, so that the contact portion with the cable is one side. Can be used for flat cable connectors. For example, FIG. 4 shows an example of two-fold bending, in which the flat strip-shaped connecting means 27 protruding from the connector 23b on the first circuit board 23 is bent at the bent portion 27a and once bisected vertically by the long side of the connector 23b. The wire B is drawn out to the side opposite to the connector 24b, is bent again at the bent portion 27a, and is drawn out to the connector 24b side.
[0055]
A fixing means 27b is used to fix the flat strip-shaped connection 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 at intervals, and between the joints. A method of detachably fixing through the connection means 27 is preferable. Further, it is also possible to attach a double-sided tape between the connection means 27 and the cover 26 and bond them.
[0056]
A through hole 18m is provided in the vicinity of a portion of the frame 18 facing the first circuit board 23, and a push button switch 23f disposed on the first circuit board 23 passes through the through hole 18m to form a frame. 18 protrudes from the surface 18b. The movable direction of the push button 23g of the push button switch 23f is substantially perpendicular to the surface of the circuit board 23. Since the through hole 18m also has the purpose of reducing the weight of the frame 18, the size of the through hole 18m is determined including the necessary degree of weight reduction.
[0057]
The push-button switch 23f detects the open / close state of a cover that can be opened and closed attached to the portable electronic device. However, the detected signal can be sent to the portable electronic device. Further, the push button switch 23f can be provided on the surface 18b of the frame 18.
[0058]
Further, the frame 18 has another through hole 18n, and exposes a part of the solenoid 25 when viewed from the surface 18b side of the frame 18.
[0059]
A brake 28 for stopping the rotation of the disk is provided on the surface 18b of the frame 18 as needed. The brake 28 includes a case 28a, a movable part 28b, a pad 28c, and a spring 28d. Although the case 28a is formed integrally with the frame 18, the case 28a may be formed of another member made of the same material or a different material as 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 center of rotation of the spindle motor 19e, and the movable range is regulated by the case 28a. The spring 28d is set so as to push the movable portion 28b toward the radial center of the spindle motor 19e. The pad 28c is provided on a surface of the movable portion 28b toward the center in the radial direction of the spindle motor 19e, and is made of a material having a high friction coefficient with a 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 plane parallel to the disk with respect to a vertical surface of the moving shaft 28e. Thus, even if 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 becomes constant, and the pressing force of the pad 28c against the disk becomes 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 to 58.5 mm to 61.5 mm as 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 to 4 mm to 10 mm. The spring 28d is set so that a disk having a diameter of 120 mm is mounted thereon, and when the pad 28c is hit for braking, a predetermined pressing force (for example, about 10 g weight) is applied to the disk from the pad 28c. With such a setting, the rotation of the disc having a diameter of 120 mm can be sufficiently stopped. Further, a dimension H of the surface of the pad 28c in contact with the disk in the disk thickness direction is set to 4 mm to 10 mm. Accordingly, the side surface of the disk can be reliably brought into contact with the pad 28c when the disk is stopped, including play in the thickness direction of the disk when the disk is mounted and warpage within the specified range of the disk. The movable portion 28b is provided with an inclined surface 28f, and when a push rod from the outside pushes the inclined surface 28f, the radial movement of the spindle motor 19e of the movable portion 28b is obtained. Specifically, a push rod is provided on a movable disk cover for taking out a disk of a portable electronic device, and the push rod pushes the inclined surface 28f by closing the movable disk cover, and the movable portion 28b separates from the disk 28g to release the brake. I do.
[0060]
The outer shape of the frame 18 has a shape capable of holding the pickup module 19, the first circuit board 23, and the second circuit board 24, for example, surrounds the outer periphery of the pickup module 19, and the first circuit board 23 and the second circuit board 24 The shape is set so that the cover holder can be attached.
[0061]
The optical disk device fixing portion 29 is provided so as to protrude from the side portion 18 e or the side portion 18 f of the frame 18, enter the inside of the frame 18 from the side portion of the frame 18, or in the plane of the frame 18.
[0062]
The optical disk device fixing portion 29 is provided integrally with the frame 18. However, the optical disk device fixing portion 29 or a portion including the optical disk device fixing portion 29 is formed of another member of the same material or a different material. It may be mechanically connected to the head by screwing, welding or shape fitting, or attached by bonding with an adhesive or the like.
[0063]
Further, it is preferable to provide about 2 to 10 optical disk device fixing sections 29, and it is particularly preferable to provide about 4 to 8 optical disk fixing sections. It is difficult to mount the optical disk device fixing portion 29 with sufficient strength with one optical disk device fixing portion 29. If the number of optical disk device fixing portions 29 is more than 10, mounting takes a long time, and the productivity may be reduced.
[0064]
For example, when a screw is set up on the outer periphery of the frame 18 so as to be substantially perpendicular to the surface 18b of the frame 18 and screwed, the shape of the optical disk device fixing portion 29 is changed to the side portion 18e of the frame 18 as shown in a portion D in FIG. Alternatively, a land 29a protruding from the side portion 18f substantially in parallel with the surface 18b of the frame 18 and a hole 29b substantially perpendicular to the surface of the frame 18 through which screws pass are formed. Alternatively, as shown in part E of FIG. 2, a land 29 c that has entered from the side portion 18 e or the side portion 18 f of the frame 18 substantially parallel to the surface 18 b of the frame 18 and a surface substantially perpendicular to the surface of the frame 18 for passing screws. It is composed of a hole 29d. The shape of the optical disk device fixing portion 29 is a flat plate protruding substantially perpendicularly to the surface 18b of the frame 18 in the shape shown in the portion D in FIG. Can be attached to a fixed portion of the portable electronic device facing the surface of the frame 18 in parallel with the surface 18b of the frame 18.
[0065]
Further, the shape of the optical disk device fixing portion 29 has a joining portion that can be thermally welded or ultrasonically welded, and the optical disk device can be fixed to a portable electronic device by heat welding or ultrasonic welding.
[0066]
In addition, as a method for fixing the portable electronic device to another optical disk device, a shape (preferably a fixed portion having a flat portion) that can be fixed by an adhesive is provided on both the optical disk device and the portable electronic device. It is also possible to use a method in which a part is fixed with an adhesive or a part is fixed by using an adhesive in combination with another bonding means. In this case, the use of the adhesive makes it possible to fix the optical disk device even in a difficult place such as screwing, so that the degree of freedom of design increases.
[0067]
FIG. 6 is a diagram showing another mounting method of the optical disk device according to the embodiment of the present invention as another method of fixing the optical disk device to the portable electronic device. The frame 18 of the optical disk device is provided with an optical disk device fixing portion 29, which is fixed by screwing or welding or by an adhesive, and one or more locking claws 30. Is provided. Further, on the inner surface of the portable electronic device 15, a locking portion 31 with a locking claw 30 is provided. Thus, the locking claw 30 of the frame 18 of the optical disk device 11 and the locking portion 31 on the inner surface of the portable electronic device 15 are locked, and then fixed by the optical disk device fixing portion 29, so that the optical disk device 11 is portable. Is fixed to the inner bottom surface of the information terminal 15. In this mounting method, it is possible to reduce the number of screwed portions by using partly fitting claws, and it is possible to improve the assemblability.
[0068]
FIG. 7 is a diagram showing an example of the arrangement of the drive eject switches according to the present embodiment. To eject the disc, the drive eject switch 32 provided on the portable electronic device 15 is operated. As a result, the movable disk cover 33 provided on the computer main body is opened, and at the same time, control operations such as terminating the running application and stopping the spindle motor are performed. In the conventional technology, the drive eject switch is provided on the optical disk device side, but by attaching the drive eject switch to the portable electronic device body instead of on the optical disk device, a mechanism for holding the drive eject switch is provided. Since it can be omitted from the optical disk device side, the size can be reduced, and the whole computer can also be reduced in size.
[0069]
In the optical disk device configured as described above, each member is attached to the frame 18 and the frame 18 is directly attached to the portable electronic device instead of the conventional configuration in which the members are attached to the housing 10 and attached to the portable electronic device. Since the housing 10 is attached by screws or the like, the housing 10 is not required, and a portable electronic device that is thinner and lighter than a portable electronic device to which a conventional optical disk device is attached can be provided.
[0070]
The optical disk device of the present embodiment can be mounted not only on portable electronic devices but also on fixed electronic devices.
[0071]
The optical disk device 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 disk device in the electronic device, the electronic device itself can be downsized. You can do it.
[0072]
The optical disk device according to the embodiment of the present invention is particularly useful in a configuration in which a disk having a diameter of 110 mm to 130 mm can be mounted.
[0073]
【The invention's effect】
As described above, the present invention includes a frame, an optical pickup module fixed to the frame, and a circuit board that forms a control circuit fixed to the frame, and the frame is provided with an attachment portion to another member. In addition, no housing is required, and the device can be made thinner and lighter.
[Brief description of the drawings]
FIG. 1 is a perspective view of an optical disk device according to an embodiment of the present invention as viewed from the front surface. FIG. 2 is a perspective view of the optical disk device according to an embodiment of the present invention as viewed from the back surface with a cover and connection means removed. FIG. 3 is a diagram showing a configuration of an optical system of the optical disk device according to one embodiment of the present invention; FIG. 4 is a perspective view of the optical disk device according to one embodiment of the present invention as viewed from the back; FIG. 6 is a front view of the optical disc device according to the embodiment; FIG. 6 is a diagram showing another mounting method of the optical disc device according to the embodiment of the present invention; FIG. 8 is a perspective view showing a configuration of a conventional portable electronic device built-in type optical disc device. FIG. 9 is a perspective view showing a conventional portable electronic device built-in type optical disc device. Figure [EXPLANATION OF SYMBOLS] showing a kick installation in a portable electronic device
DESCRIPTION OF SYMBOLS 1 Optical pickup 2 Main shaft 3 Sub shaft 4 Spindle motor 5 Base 6 Pickup module 7 Tray 8 Carriage 9 Rail 10 Housing 11 Optical disk device 12 Mounting screw hole 13 on optical disk device side 13 Circuit board 14 which constitutes a control circuit etc. Frame 15 Mobile Electronic device 16 Attachment 17 Attachment-side mounting hole 18 Frame 18a holding each part Through hole 18b Surface 18c Ridge 18d Back 18e Side 18f Side 18g near the protrusion 18g Top 18h Inner end 18i Through hole 18j For taking out a disk Depression 18k Locking portion 18l Locking portion 18m Through hole 18n Through hole 19 Pickup module 19a Frame 19b Cover 19c Through hole 19d Bottom plate 19e Spindle motor 19f, 19g Shaft 19h Raised portion 19 i Mounting part 19j Vibration damper 20 Carriage 20a Guide 20b Frame 20c Reflection mirror 20d Collimating lens 20e Prism 20f Rising prism 20g 1 / 4λ plate 20h Objective lens 20i Disk 20j Collimating lens 20k Stacked prism 201 Sensor 20m CD semiconductor laser 21 Motor 21a Gear group 21b Rotary shaft 22 Actuator 22a Damper 22b Actuator coil 23 First circuit board 23a, 23b Connector 23c One side of first circuit board facing pickup module 24 Second circuit board 24a Arc-shaped cutout 24b , 24c, 24d, 24e Connector 24f One side 25 facing the pickup module of the second circuit board 25 Solenoid 26 Cover 26a Cover fixing portion 26 b Through-hole 26c Projecting portion 27 Connecting means 27a Bending part 27b Fixing means 28 Brake 28a Case 28b Moving part 28c Pad 28d Spring 28e Moving shaft 28f Inclined surface 28g Disk 29 Optical disk device fixing part 29a Land 29b hole 29c Land 29d hole 30 Lock Claw 31 Locking part 32 Drive eject switch 33 Moving disk cover A Moving direction of carriage B Vertical bisector of long side of connector 23b C Vertical bisector D of long side of connector 24b Projecting from frame side In the vicinity of the land E In the vicinity of the land entering the side of the frame F Distance from the center of the spindle motor 19e to the surface of the pad 28c G Dimension of the pad 28c in the circumferential direction of the disk H Dimension of the pad 28c in the disk thickness direction

Claims (9)

A frame, an optical pickup module fixed to the frame, a circuit board that forms a control circuit fixed to the frame, and brake means that abuts on an outer periphery of a disk fixed to and mounted on the frame; An optical disk device, wherein the means is provided on the outer periphery of the disk so as to be able to contact / non-contact. 2. The optical disk apparatus according to claim 1, wherein the brake means includes at least one of a contact piece movably provided, a biasing means for pressing the contact piece, and a case for accommodating the respective parts. . 3. The optical disk device according to claim 2, wherein the case is formed integrally with the frame, and the case is provided so as to protrude toward a surface of the frame, which is a disk mounting side. The case has a side wall integrally formed on the frame and surrounding at least three sides protruding toward the surface of the frame, and a top plate provided integrally with the side wall and covering the upper side, and the optical pickup module side is opened. The contact piece is provided so as to close the opening, and the contact piece is held so as to be movable in a direction approaching or moving away from the optical pickup module side. An optical disk device as described in the above. 2. The optical disk device according to claim 1, wherein the brake means is moved by the action of an external member. 6. The optical disk device according to claim 5, wherein an interlocking member is used as an external member by an operation of taking out a disk provided in an electronic device or the like, and the interlocking member acts on a brake means. 2. The optical disk device according to claim 1, wherein the weight of the frame is 15 g or less. 2. The optical disk device according to claim 1, wherein the weight of the optical disk device is 135 g or less. Lead-free materials are used for the members and members of the optical pickup module, the bonding materials of the electronic components and electronic components of the circuit board, and the members and members mounted on the frame. The optical disk device according to claim 1, wherein

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