JP2009271964A - Disk drive device - Google Patents

Abstract

An object of the present invention is to prevent the floating of a flexible wiring board without increasing the number of parts.
A spindle motor is fixed to a surface of a motor plate. A flexible wiring board 38 for supplying a drive signal to the spindle motor 14 is disposed on the surface of the motor plate 40. The motor plate 40 is attached to the back surface of the elevating frame 11 via the first and second spacers 57 and 58. A protrusion 65 is formed on the first spacer 57 facing the flexible wiring board 38. The flexible wiring board 38 is pressed against the motor plate 40 by the protrusion 65 to prevent the floating.
[Selection] Figure 4

Description

  The present invention relates to a disk drive device for driving a disk.

  An optical disc such as a CD or a DVD is loaded into a disc drive device to record / reproduce information. The disk drive device includes a turntable unit that rotates an optical disk at high speed and a pickup head that moves an optical pickup in a radial direction of the optical disk and irradiates the optical disk with laser light.

  A spindle motor having one end fixed on a motor plate is used for the turntable unit. A turntable for mounting an optical disk is attached to the other end of the spindle motor.

  A flexible wiring board for supplying a drive signal to the spindle motor is disposed on the motor plate. This flexible wiring board is bonded onto the motor plate with, for example, a double-sided tape. If the length of the flexible wiring board is short, stress or vibration may be applied to the connecting portion between the flexible wiring board and the spindle motor during the lifting / lowering movement of the lifting / lowering frame, which may cause damage. For this reason, for example, the length of the flexible wiring board is made sufficiently long, and the flexible wiring board is folded back to the opposite surface of the motor plate to give a margin to the flexible wiring board.

  By the way, when the spindle motor rotates, the adhesive force of the double-sided tape is weakened and peeled off due to heat generated from the spindle motor, and the flexible wiring board may be lifted from the motor plate. In particular, when the flexible wiring board is folded, the vicinity of the folding is easily lifted by the elasticity of the flexible wiring board. When the flexible wiring board is lifted, it makes contact with the rotating spindle motor and generates abnormal noise or generates vibration noise with the motor plate.

Patent Document 1 describes a disk drive device in which a floating prevention member in the form of a plate is stacked on a flexible wiring board disposed on a base to prevent the flexible wiring board from rising. The lifting prevention member is formed by bending a leaf spring material or the like, and has substantially the same shape as the flexible wiring board. Also, fitting holes are formed in the base and the flexible wiring board, and fitting protrusions formed on the lifting prevention member are fitted into these fitting holes, and the lifting prevention member is stacked on the flexible wiring board. .
Japanese Patent Laid-Open No. 06-119756

  However, in patent document 1, since it is necessary to provide a floating member separately, the number of parts will increase. Moreover, since the lifting prevention member is processed into substantially the same shape as the flexible wiring board, the manufacturing cost increases. Furthermore, since it is necessary to form a fitting hole in the motor plate or the flexible wiring board in order to fix the lifting prevention member to the motor plate, the manufacturing cost is further increased.

  An object of the present invention is to provide a disk drive device that can prevent the floating of a flexible wiring board without increasing the number of components.

  In order to achieve the above object, the disk drive device of the present invention is characterized in that a protrusion is formed on a member facing the flexible wiring board, and the flexible wiring board is pressed onto the motor plate by the protrusion.

  The flexible wiring board is preferably joined to the motor plate with a double-sided tape and folded back to the opposite surface of the motor plate.

  It is preferable that the protrusion presses the vicinity of the folded back of the flexible wiring board.

  It is preferable to provide a protrusion on a spacer disposed between a lifting frame that moves up and down and a motor plate to attach and detach the disk to and from the turntable.

  It is preferable to provide a protrusion on the lifting frame.

  It is preferable to provide a protrusion on the cover fixed to the lifting frame.

  In the present invention, since a protrusion is provided on a member facing the flexible wiring board, and the flexible wiring board is pressed against the motor plate by the protrusion, no special parts are required, resulting in an increase in the number of parts and an increase in assembly man-hours. There is nothing. Further, since only the protrusions are formed on the existing parts, the processing and structure are simple, and the cost increase can be suppressed.

  In FIG. 1, the disk drive device 1 includes a main body case 2 configured in a shielded state. A bezel 3 is attached to the front surface of the main body case 2. The bezel 3 is provided with a slot 3a into which the disc DI is inserted, a push button 4 for instructing ejection of the disc DI, and an indicator 5 for displaying the operating state of the disc drive device 1.

  A top plate 6 is attached to the main body case 2. Near the center of the top plate 6, there is formed an opening 6a through which a chucking head 16 (see FIG. 2) slightly enters when the disk DI is chucked.

  In FIG. 2 with the top plate 6 removed, the base 10 is fixed to the main body case 2 so as to partition the main body case 2 up and down. The base 10 is formed with an opening 10a extending obliquely from the center. A sheet metal lifting frame 11 is disposed in the opening 10a. A metal thin plate cover 11 a is fixed to the surface side of the elevating frame 11. The cover 11a is formed with an opening 11b extending obliquely from the center.

  When the disk DI is carried into or out of the main body case 2, the elevating frame 11 swings in the vertical direction at the tip side located at the center of the main body case 2 with the bezel 3 side as a fulcrum. In order to alleviate the impact during the up-and-down movement, the lifting frame 11 is composed of a plurality of buffer support structures 12 including a shaft provided between the base 10 and the bottom plate of the main body case 2 and a rubber ring fitted to the shaft. It is attached to the base 10 at a location.

  A turntable unit 13 is attached to the tip of the lifting frame 11. The turntable unit 13 includes a spindle motor 14, a turntable 15, and a chucking head 16. A turntable 15 is attached to the spindle motor 14. A chucking head 16 is formed integrally with the turntable 15. The chucking head 16 chucks the disk DI when the center hole of the disk DI is set at a chucking position where the center hole of the disk DI coincides with the chucking head 16 and the elevating frame 11 is raised. Further, the chucking head 16 is provided with a plurality of chucking claws 16a biased by springs, and detachably locks the disc DI.

  A pickup head 19 is attached to the lifting frame 11. The pickup head 19 is disposed below the opening 11 b of the lifting frame 11 and has an optical pickup 20. When recording / reading data to / from the disk DI, the pickup head 19 moves along the opening 11b in the radial direction of the disk DI.

  A disk guide piece 21 for guiding the lower surface of the disk DI is attached to the elevating frame 11. The disc guide piece 21 has a leading end extending to the side of the turntable 15 along the loading direction of the disc DI. Further, the disk guide piece 21 is formed with a slope that gradually increases toward the tip, and the disk DI inserted without being collided with the chucking head 16 by lifting the disk DI upward. Is guided to the holder 24a of the disk support arm 24 so as to be carried into the main body case 2.

  On the base 10, a disk support arm 24 for carrying in and out the disk DI and an attracting arm 25 for carrying the disk DI inserted from the slot 3a into the main body case 2 are swingably arranged. Has been. The disk support arm 24 holds the front end edge of the disk DI by the holder 24a and swings about the shaft 23. The attracting arm 25 holds the rear end edge of the disk DI by the flanged roller 25 a and swings about the shaft 26. A link lever 27 is connected to swing the attracting arm 25.

  The disk support arm 24 and the attracting arm 25 are driven by a known disk loading mechanism (not shown) provided on the back side of the base 10 and carry in / out with the disk DI interposed therebetween. Further, the disk loading mechanism swings the lifting frame 11 between a lowered position, a raised position (recording / reading position), etc. via pins 29 a and 29 b provided on the lifting frame 11.

  As shown in FIG. 3, the pickup head 19 is supported by a main shaft 30 and a sub shaft 31 fixed to the back surface of the elevating frame 11, and is movable in the radial direction of the disk DI. Further, a thread motor 32, a gear train 33, a lead screw 34, and the like are fixed. The rotation of the thread motor 32 is transmitted to the lead screw 34 via the gear train 33. When the lead screw 34 rotates, the pickup head 19 moves in the radial direction of the disk DI.

  A control board 37 for controlling the driving of the spindle motor 14 is attached to the back surface of the base 10. The control board 37 has a female connector 37a. The female connector 37a is connected to one end portion 38a of the flexible wiring board 38. The flexible wiring board 38 connects the control board 37 and the spindle motor 14.

  As shown in FIGS. 4 to 6, the spindle motor 14 is fixed to the surface of the motor plate 40. The spindle motor 14 includes a shaft 41, a rotor hub 42, a rotor magnet 43, and a stator coil 44. The lower end portion of the shaft 41 is fixed to the motor plate 40 by a known mounting member 45. The shaft 41 holds the rotor hub 42 rotatably. The rotor magnet 43 is fixed to the inner surface of the side wall portion of the rotor hub 42. The stator coil 44 is attached to the shaft 41 inside the rotor magnet 43.

  Two screw holes 48a and attachment holes 49 are formed on the back surface of the front end portion of the elevating frame 11, and screw holes 48b are formed on the back surface of the side end portions. Screw insertion holes 50a and 50b are formed at positions corresponding to the screw holes 48a and 48b at the tip of the motor plate 40.

  A first spacer 57 and a second spacer 58 are disposed between the motor plate 40 and the lifting frame 11, and the motor plate 40 is moved by the three screws 59 via the first and second spacers 57 and 58. It is fixed to. The first and second spacers 57 and 58 position the height of the spindle motor 14.

  The first spacer 57 includes two columnar spacer main body portions 60 and a plate-like connecting portion 61 that connects them. The spacer main body 60 is located between the screw hole 48 a and the screw insertion hole 50 a, and the upper surface thereof is in contact with the back surface of the elevating frame 11 and the lower surface thereof is in contact with the surface of the motor plate 40. Further, the spacer body 60 has a screw insertion hole 62 at a position corresponding to the screw hole 48a and the screw insertion hole 50a. Further, a cylindrical boss 63 is formed on the lower surface of the spacer body 60. The diameter of the boss 63 is slightly smaller than the diameter of the screw insertion holes 50a and 50b. The second spacer 58 has the same shape as the spacer body 60, and is disposed between the screw hole 48b and the screw insertion hole 50b.

  The connecting portion 61 is substantially parallel to the leading edge of the motor plate 40 and is located substantially above the leading edge. Two cylindrical bosses 64 are formed on the upper surface of the connecting portion 61 at positions corresponding to the mounting holes 49. Three hemispherical protrusions 65 are formed on the lower surface of the connecting portion 61 so as to face the upper substrate portion 66 a of the flexible wiring board 38.

  The other end portion 38 b of the flexible wiring board 38 is disposed on the surface of the motor plate 40. The other end portion 38b is folded back from the front surface of the motor plate 40, and includes an upper substrate portion 66a located on the front surface side, a lower substrate portion 66b facing the back surface side, and a folded portion 66c. .

  A double-sided tape 67 (see FIG. 4) is provided between the upper substrate portion 66a and the motor plate 40. The double-sided tape 67 joins the upper substrate portion 66 a to the surface of the motor plate 40. In addition, a part of the upper substrate portion 66a is located between the motor plate 40 and the rotor hub 42, and a terminal 68 is provided in this part. The terminal 68 is electrically connected to the stator coil 44. The lower substrate portion 66b is bent in a U shape in a direction from the folded portion 66c toward the control substrate 37. The vicinity of the folded portion 66 c is pressed against the motor plate 40 by the protrusion 65 of the first spacer 57.

  Next, a procedure for mounting the spindle motor 14 will be described. The upper substrate portion 66 a of the flexible wiring board 38 is joined to the surface of the motor plate 40 with a double-sided tape 67. Next, the lower substrate portion 66 b is folded back to the back surface of the motor plate 40. Then, the spindle motor 14 is fixed to the motor plate 40. At this time, the terminal 68 is soldered to the stator coil 44.

  After the spindle motor 14 is fixed, the boss 64 of the first spacer 57 is fitted into the mounting hole 49 of the lifting frame 11, and the first spacer 57 is mounted on the back surface of the lifting frame 11. Further, the second spacer 58 is attached to the screw insertion hole 50 b of the motor plate 40.

  Next, the motor plate 40 is set on the back surface of the elevating frame 11 with the first spacer 57 interposed therebetween. Then, the boss 63 of the first spacer 57 is fitted into the screw insertion hole 50 a and the motor plate 40 is attached to the back surface of the elevating frame 11. After this mounting, the screws 59 are inserted through the screw insertion holes 50a and 50b and the screw insertion holes 62 so that the heads of the screws 59 are located on the back side of the motor plate 40, and then screw holes 48a and 48b. Screwed together. Accordingly, the motor plate 40 is held on the back surface of the elevating frame 11 with the first and second spacers 57 and 58 being sandwiched, and the height of the spindle motor 14 is positioned. After these operations are completed, one end portion 38 a of the flexible wiring board 38 is connected to the control board 37.

  Since the projection 65 of the first spacer 57 presses the vicinity of the folded portion 66c of the flexible wiring board 38 against the motor plate 40, even if the adhesive force of the double-sided tape 67 is weakened by heat generated from the spindle motor 14, the flexible wiring board. 38 is prevented from floating from the motor plate 40.

  Next, the effect | action of the said embodiment is demonstrated using FIGS. 1-3. Prior to insertion of the disk DI, the elevating frame 11 is in the lowered position. When the disc DI is inserted into the main body case 2, the leading edge of the disc DI is supported by the holder 24 a of the disc support arm 24. When the disk DI is further pushed in, a disk loading mechanism (not shown) is operated, the disk support arm 24 swings counterclockwise, and the attracting arm 25 swings clockwise. In the attracting arm 25, a roller 25a attached to the front end pushes the rear end edge of the disk D1. Thereby, the disc DI is carried into the chucking position.

  Next, the elevating frame 11 is raised from the lowered position toward the recording / reading position. As a result, the chucking head 16 enters the center hole of the disk DI and is locked by the chucking claw 16a. After the chucking is completed, a drive signal is supplied from the control board 37 to the stator coil 44 of the spindle motor 14 via the flexible wiring board 38. Thereby, the rotor hub 42, the turntable 15, and the chucking head 16 (spindle motor 14) rotate to rotate the disk DI at a high speed. In this state, when the sled motor 32 rotates, the pickup head 19 moves in the radial direction of the disk DI and performs recording / reproduction of the disk DI.

  While the spindle motor 14 is rotating, the flexible wiring board 38 is pressed against the motor plate 40 by the protrusions 65 of the first spacer 57, although the adhesive force of the double-sided tape 67 becomes weak and easily peels off. For this reason, the flexible wiring board 38 is not peeled off from the motor plate 40 and does not come into contact with the lower surface of the spindle motor 14 to generate sound or vibrate on the motor plate 40 to generate sound. Further, since the folded portion 66c has the strongest elasticity, this portion is particularly easily peeled off. However, since the vicinity of the folded portion 66c is pressed by the projection 65, the peeling can be effectively prevented.

  Press the push button 4 to end recording / playback of the disc. When this push button 4 is pressed, the spindle motor 14 stops and the sled motor 32 reverses to return the pickup head 19 to the initial position. Next, the disk loading mechanism is operated, and the reverse operation to the loading of the disk DI is performed, and the disk DI is unloaded.

  In the above embodiment, the protrusion 65 is formed on the first spacer 57. However, as in the embodiment shown in FIG. 7, for example, the protrusion 70 is provided on the back surface of the elevating frame 11, and the folded portion 66c of the flexible wiring board 38 is provided. The vicinity may be pressed. In this case, a connecting portion 71 having a shape that does not contact the protrusion 70 is formed on the first spacer 57.

  Further, as in the embodiment shown in FIG. 8, the cover 11a may be formed with a protrusion 73 that extends downward from between the elevating frame 11 and the spindle motor 14 and contacts the upper substrate portion 66a of the flexible wiring board 38. . Furthermore, the protrusion 73 may have a shape that makes contact with the vicinity of the folded portion 66c.

  In each of the above embodiments, the first spacer 57, the lifting frame 11, and the cover 11a are provided with protrusions. However, if there is a member facing the flexible wiring board 38 (upper board portion 66a) in addition to these, A protrusion may be formed on the member.

In the above embodiment, the upper substrate portion 66a of the flexible wiring board 38 is joined to the surface of the motor plate 40 with the double-sided tape 67, but the lower substrate portion 66b is similarly attached to the back surface of the motor plate 40 with the double-sided tape 67 or the like. You may join. Furthermore, although the flexible wiring board 38 is folded back on the back surface of the motor plate 40, the present invention can also be applied when the flexible wiring board is not folded back. In addition, this invention is applicable also when not joined with a double-sided tape, an adhesive agent, etc.

  The present invention can be applied to a tray type in addition to a slot-in type disk (drive) device, and also to various disk drive devices that use a magnetic disk or the like as a storage medium. Can do.

It is a perspective view of a disk drive device. It is a top view of the disk drive apparatus which removed the top plate. It is a bottom view of the disk drive device with the bottom surface omitted. It is sectional drawing of the disk drive device of this invention. 1 is a perspective view of a disk drive device of the present invention. It is a disassembled perspective view of the disk drive device of this invention. It is sectional drawing of embodiment which formed the protrusion in the raising / lowering frame. It is sectional drawing of embodiment which formed the protrusion in the cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disk drive device 11 Lifting frame 11a Cover 14 Spindle motor 38 Flexible wiring board 40 Motor plate 57 1st spacer 65,70,73 Protrusion

Claims (6)

In a disk drive apparatus in which a spindle motor is fixed on a motor plate, a turntable for mounting a disk is mounted on the spindle motor, and a flexible wiring board for supplying a drive signal to the spindle motor is disposed on the motor plate. ,
2. A disk drive device according to claim 1, wherein a protrusion is formed on a member facing the flexible wiring board, and the flexible wiring board is pressed onto the motor plate by the protrusion.   2. The disk drive device according to claim 1, wherein the flexible wiring board is joined to the motor plate with a double-sided tape and is folded back to the opposite surface of the motor plate.   3. The disk drive device according to claim 2, wherein the protrusion presses the vicinity of the folded back of the flexible wiring board.   The opposing member is a spacer disposed between the motor plate and the lifting frame, and the lifting frame holds the motor plate attached via the spacer, and the disk is turned into a turntable. 4. The disk drive device according to claim 1, wherein the disk drive device is moved up and down to be attached to and detached from the disk drive.   4. The disk according to claim 1, wherein the opposing member is an elevating frame, and the elevating frame holds the motor plate and moves up and down to attach and detach the disk to and from the turntable. Drive device.   4. The facing member is a cover, and the cover is fixed to a lifting frame that holds the motor plate and moves up and down in order to attach and detach the disk to and from the turntable. The disk drive device according to any one of claims.

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