WO2012063807A1

WO2012063807A1 - Motor unit, optical pickup supporting device, optical disk device, method for adjusting motor unit, and method for manufacturing optical pickup supporting device

Info

Publication number: WO2012063807A1
Application number: PCT/JP2011/075691
Authority: WO
Inventors: 青木　武
Original assignee: 三洋電機株式会社
Priority date: 2010-11-08
Filing date: 2011-11-08
Publication date: 2012-05-18
Also published as: JP2014017027A

Abstract

[Problem] After a spindle motor unit, a first guiding shaft, and a second guiding shaft are mounted on a chassis as separate components, a skew adjustment in the tangential direction is performed in order to position the rotary shaft of the spindle motor perpendicular to the traveling plane of an optical pickup device, so skew adjustment components and a cumbersome skew adjustment step have been required. [Solution] Fixing members for a first guiding shaft and a second guiding shaft, which are to be fixed later, are provided on a spindle motor unit; using an adjustment jig that is provided with position clamping jigs that match the shapes of the first guiding shaft and the second guiding shaft and which utilizes a plane that is parallel to the traveling plane of an optical pickup device, which is defined by both the guiding shafts, as a reference plane, the positional clamping jigs are brought into contact with the fixing members; and an adjustment is made such that the rotary shaft of a turn table on the spindle motor becomes perpendicular to the reference plane. Also, a spindle motor unit that has been adjusted in said manner is provided.

Description

Motor unit, optical pickup support device, optical disk device, motor unit adjustment method, and optical pickup support device manufacturing method

The present invention relates to a motor unit, an optical pickup support device, an optical disc device, a motor unit adjustment method, and an optical pickup support device manufacturing method used in an optical pickup support device that moves the optical pickup device in a predetermined direction.

2. Description of the Related Art Optical disk apparatuses that can perform signal reading operations and signal recording operations by irradiating a signal recording layer of an optical disk with laser light emitted from an optical pickup device have become widespread.

As an optical disk device, an apparatus using an optical disk called CD or DVD is generally popular, but recently, an apparatus using an optical disk called Blu-ray standard with further improved recording density has been developed.

The optical pickup device incorporated in the optical disk apparatus is configured to be moved in the radial direction of the optical disk by the rotational driving force of the pickup feeding motor. And since such an optical pickup device needs to accurately read out the signal recorded on the optical disc, it is necessary to accurately move the optical disc in the radial direction. In general, the moving operation of the optical pickup device is guided by a pair of guide shafts (guide shafts) fixed to a chassis (fixed substrate) (see Patent Document 1).

Furthermore, the position of the above-described guide shaft is held by a frame-shaped chassis (see Patent Document 2). Specifically, the vicinity of both ends of the two guide shafts is adjusted to a predetermined position by fastening means such as a screw mechanism and fixed to the chassis. When the guide shaft is attached to the chassis in a state in which fine adjustment with the screw is performed, the reading operation and the recording operation of the optical pickup device can be performed with high accuracy.

In the optical pickup supporting device, the skew angle (the amount of deviation of the angle between the optical axis of the objective lens mounted on the optical pickup device and the axis perpendicular to the information recording surface of the optical disk) is read by the optical pickup device. Affects operations and write operations. For this reason, it is necessary to adjust the traveling surface of the optical pickup device determined by the two guide shafts for guiding the movement of the optical pickup device in parallel to the information recording surface of the optical disc. For this reason, a skew adjustment mechanism is mounted on the chassis. The skew adjustment mechanism adjusts the position of the guide shaft by, for example, rotating and adjusting a screw inserted into a screw hole provided in the chassis. When the skew adjusting mechanism is provided at least at three or more ends of a pair of guide shafts, for example, skew adjustment in the radial direction (radial direction) of the optical disc and the tangential direction (tangential direction) perpendicular thereto is performed. (See Patent Document 3).

Furthermore, the spindle motor that mounts and rotates the optical disk constitutes a single component (spindle motor unit) that is separate from the chassis, along with the motor support board to which it is mounted and the circuit board for driving the motor. is doing. Then, a spindle motor unit, a guide shaft, an optical pickup device, and the like are attached to the chassis to constitute an optical pickup support device (see Patent Document 4).

FIG. 9 is a schematic diagram showing the relationship between the spindle motor unit and the guide shaft of the optical pickup support device in the conventional structure, and a sectional view in a direction perpendicular to the running surface of the optical pickup device and the extending direction of the guide shaft. It is.

The spindle motor 102 and a circuit board (not shown here) are provided on the motor support board 101, and the spindle motor unit 100 is configured. A turntable 103 that supports and rotates an optical disk is provided on the spindle motor 102.

The chassis 110 is provided with

fixing portions

111a and 111b of two guide shafts 112 (a main guide shaft 112a and a sub guide shaft 112b) at positions sandwiching the spindle motor 102 in this cross section, and the guide shaft 112 is fixed to each of them. . The motor support substrate 101 is attached to the chassis 110 with screws or the like.

Japanese Patent Laid-Open No. 11-66767 JP 2003-208767 A JP 2001-195848 A JP-A-10-195848

Referring to FIG. 9, the traveling surface of the optical pickup device should be adjusted in parallel to the information recording surface of the optical disk, that is, the main surface 103s of the turntable 103. The traveling surface of the optical pickup device is the main guide. This is a running surface R (dashed line) of the optical pickup device that moves in the inner circumference-outer circumference direction of the optical disc by the shaft 112a and the sub guide shaft 112b.

Further, the level of the traveling surface R and the main surface 103s of the turntable 103 is determined by using the perpendicularity of the rotating shaft 108 of the spindle motor 102 (turntable 103) with respect to the traveling surface R as an index, and the traveling surface R of the optical pickup device. Making the main surface 103s of the turntable 103 horizontal means that the rotating shaft 108 is made substantially perpendicular to the traveling surface R (for example, the degree of verticality in a range up to 0.15 degrees from vertical). Further, in the following description, there is a case where it is described that ensuring the vertical axis is that the rotation axis of the spindle motor (turntable) is substantially perpendicular to a certain reference surface, not limited to the guide shaft. is there.

In the conventional structure shown in FIG. 9, when the guide shaft 112 and the spindle motor unit 100 are attached to the chassis 110, the vertical degree of the traveling surface R of the optical pickup device and the rotation shaft 108 of the spindle motor is defined by the chassis 110. The

In general, the spindle motor unit 100 is often adjusted so as to ensure the vertical axis of the rotary shaft 108 as a single component, but in this case, a reference plane (axis The vertical reference surface S) is a surface that coincides with or is parallel (horizontal) to the main surface 101 s of the motor support substrate 101. In other words, the axis of the rotating shaft 108 may be secured with respect to the main surface 101 s of the motor support substrate 101. However, since the chassis 110 and the motor unit 100 are separate bodies, when the processing distortion in the chassis 110 or the processing error of the

fixing portions

111a and 111b of the guide shaft 112 occurs, the guide shaft 112 and With respect to the running surface R after the spindle motor unit 100 is mounted, it is not guaranteed that the axis of the rotating shaft 108 is secured.

If the vertical axis of the rotary shaft 108 cannot be secured with respect to the running surface R, particularly in the tangential direction (tangential direction: Dt direction) of the optical disk (turntable 103), jitter as an index of data quality deteriorates. For this reason, conventionally, after the spindle motor unit 100 is attached to the chassis 110, the main guide shaft 112a and the sub guide shaft 112b are connected to the traveling surface R by using a skew adjusting component such as a screw and a spring, for example. The skew adjustment in the tangential direction of the main surface 103s of the turntable 103 is performed by adjusting so as to be vertical.

However, skew adjustment requires a skew adjustment mechanism (parts) as disclosed in Patent Document 3.

The skew adjustment is performed by, for example, placing a reflector on the turntable 103 and adjusting the skew angle to be within 0.1 to 0.15 degrees while observing with an autocollimator device or the like. There is a problem that it is complicated and takes adjustment time.

Furthermore, in the adjustment using a skew adjustment mechanism such as a screw or a spring, for example, there is a problem that a defect due to an adjustment error occurs, a skew deviation with time elapses, or a skew deviation due to an impact test.

The present invention has been made in view of such problems. First, a motor that is incorporated in an optical pickup support device that drives an optical pickup device along a first guide shaft and a second guide shaft, and holds and rotates the optical recording medium. A motor support board, a spindle motor attached to the motor support board, a turntable that rotates together with the spindle motor and holds the optical recording medium, and a motor support board. A first fixing portion provided and fixed at one end of the first guide shaft, and a second fixing portion provided on the motor support substrate and fixed at the one end of the second guide shaft. A rotation axis of the turntable substantially perpendicular to a running surface of the optical pickup device determined by the first guide shaft and the second guide shaft. It solves With.

Second, an optical pickup support device is a chassis, an optical pickup device that emits laser light to the optical recording medium and detects the laser light reflected by the optical recording medium, and is fixed to the chassis, and the optical pickup device A first guide shaft and a second guide shaft for supporting the optical pickup device movably in a predetermined direction, drive means for driving the optical pickup device in a predetermined direction, and the motor unit fixed to the chassis. It solves by.

Third, the problem is solved by providing the optical pickup device with the optical pickup support device described above.

Fourth, an adjustment method of a motor unit that is incorporated in an optical pickup support device that drives the optical pickup device along the first guide shaft and the second guide shaft and holds and rotates the optical recording medium is attached to the spindle motor. A motor support substrate, a turntable that rotates together with the spindle motor and supports the optical recording medium, and a first fixing portion that is provided on the motor support substrate and is fixed by contacting the first guide shaft. And a step of preparing a motor unit having a second fixing portion that is provided on the motor support substrate and is to be fixed by contacting the second guide shaft, the first position receiving portion, and a second position An adjustment jig having a receiving and receiving portion is placed on the motor unit, and the first position receiving and receiving portion and the second position receiving and receiving portion are respectively fixed to the first. And a step of contacting the second fixed portion, and a step of adjusting a rotation axis of the turntable substantially perpendicular to a reference plane determined by the first position receiving portion and the second position receiving portion. To solve the problem.

Fifth, an optical pickup support device manufacturing method for driving an optical pickup device along a first guide shaft and a second guide shaft rotates with a motor support substrate to which a spindle motor is attached, and the spindle motor, A turntable for supporting an optical recording medium; a first fixing portion provided on the motor support substrate; and a second fixing portion provided on the motor support substrate; and abutting on the first fixing portion. Rotation of the turntable relative to the traveling surface of the optical pickup device determined by the first guide shaft to be fixed and the second guide shaft to be fixed in contact with the second fixing portion A step of preparing a motor unit whose axis is adjusted substantially vertically, a step of attaching the motor unit to a chassis, and the optical pickup device being movable A step of abutting and fixing one end of the first guide shaft to be held to the first fixing portion, and an abutting end of the second guide shaft for supporting the optical pickup device so as to be movable to the second fixing portion. To solve the problem.

Thus, in the present invention, the reference plane for adjusting the shaft suspension of the spindle motor unit is not a plane parallel to the motor support substrate, but the running plane of the optical pickup device determined by the two guide shafts. Spindle motor unit in which the perpendicularity of the rotation axis is adjusted with a parallel (horizontal) plane as a reference plane (the vertical axis of the rotation axis is secured with respect to the traveling surface of the optical pickup device), and an optical pickup support using the spindle motor unit An apparatus and an optical disk apparatus using the same are provided. Further, when adjusting the perpendicularity of the rotation axis of the spindle motor (turn table) of the spindle motor unit, an adjustment jig having a reference plane as a reference plane parallel to the traveling surface of the optical pickup device determined by the two guide shafts is provided. And a spindle motor unit adjusting method for adjusting the perpendicularity of the rotating shaft (to ensure the vertical axis of the rotating shaft with respect to the traveling surface of the optical pickup device), and an optical pickup supporting device manufacturing method using the same. It is to provide.

According to the present invention, the following effects can be obtained.

First, the motor support substrate is provided with a first fixing portion and a second fixing portion, which are fixed by abutting one end of each of the first guide shaft and the second guide shaft, Provided is a spindle motor unit in which the rotation axis of the turntable is substantially perpendicular to the traveling surface of the optical pickup device determined by the second guide shaft, and the turntable of the optical pickup support device incorporating the spindle motor unit (Optical disk) Skew adjustment parts in the tangential direction of the main surface can be eliminated.

Secondly, in the optical pickup support device to which the above spindle motor unit is attached, skew adjustment by a skew adjustment component in the tangential direction of the main surface of the turntable becomes unnecessary. Deviation and the like can be eliminated, and the reliability of the optical pickup support device is improved.

Third, in the method of adjusting the spindle motor unit, the motor support substrate is provided with a first fixing portion and a second fixing portion that are to be fixed by contacting the first guide shaft and the second guide shaft, Using a jig having a positioning receiving portion corresponding to the guide shaft and the second guide shaft, the positioning guide jig is brought into contact with the first fixing portion and the second fixing portion, and the first guide shaft and the second guide In a method of manufacturing an optical pickup support device incorporating the spindle motor unit by adjusting the rotation axis of the spindle motor to be perpendicular to a predetermined range with respect to the traveling surface of the optical pickup device determined by the axis The skew adjustment process in the tangential direction of the main surface of the turntable can be eliminated.

Fourth, by attaching the above spindle motor unit in the manufacturing process of the optical pickup support device, the skew adjustment process in the tangential direction of the main surface of the turntable can be reduced, so the time required for the skew adjustment process can be shortened and the productivity can be reduced. Will improve.

Fifth, in the manufacturing process of the optical pickup support device, it is possible to eliminate the occurrence of defects due to skew adjustment mistakes and improve the yield.

Sixth, when the optical pickup apparatus actuator can adjust the skew of the optical disk in the radial direction, the skew adjustment in the radial direction of the turntable in the optical pickup support apparatus is not necessary. There is also an advantage that a skew adjustment member for radial skew adjustment provided at the end of the guide shaft is not required. That is, the chassis of the optical pickup support device does not require skew adjustment parts in both the radial direction and the tangential direction.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the optical pick-up support apparatus of the 1st Embodiment of this invention, (A) is a perspective view which shows the state mounted with the surface which the objective lens of an optical pick-up apparatus exposes facing upwards, ( B) is a perspective view showing an optical pickup support device in which the state of FIG. (A) is a perspective view showing a state in which the turntable exposed surface is directed upward, and (B) is a reverse view of the state of (A). It is a perspective view, (C) It is sectional drawing of a motor unit, (D) is sectional drawing of a motor unit. It is sectional drawing explaining the running surface of this invention. It is sectional drawing for demonstrating the adjustment method of the motor unit of this invention. It is a screen figure of the autocollimator for demonstrating the adjustment method of the motor unit of this invention. (A) of the second embodiment of the present invention is a perspective view showing a state in which the objective lens of the optical pickup device is mounted so that the surface exposed is the back surface, and (B) is a b- It is b line sectional drawing. It is sectional drawing which shows the optical pick-up support apparatus of the 3rd Embodiment of this invention. It is sectional drawing which shows the optical pick-up support apparatus of the 4th Embodiment of this invention. It is sectional drawing which shows the conventional optical pick-up support apparatus.

The embodiment of the present invention will be described in detail with reference to FIGS. First, a first embodiment of the present invention will be described with reference to FIGS.

Referring to FIG. 1, the configuration of the optical pickup support device 10 of this embodiment will be described. FIG. 1A is a perspective view showing the optical pickup support device 10 placed with the objective lens 32 of the optical pickup device 30 facing upward, and FIG. 1B shows the state of FIG. It is a perspective view which shows the optical pick-up support apparatus 10 turned upside down.

Referring to FIG. 1A, an optical pickup support device 10 includes a chassis 12, an optical pickup device 30, a first guide shaft 14 and a second guide shaft 16, a drive unit 40, and a motor unit (spindle motor). Unit) 50.

The optical pickup support device 10 irradiates laser light from an objective lens 32 of the optical pickup device 30 to an optical recording medium (optical disk) (not shown) rotated by the spindle motor 61 of the spindle motor unit 50. Then, the laser beam reflected by the information recording layer of the optical disc is detected by a PDIC (Photo Diode IC: photo detector) built in the optical pickup device 30. Here, BD (Blu-ray Disc), DVD (Digital Versatile Disk) or CD (Compact Disk) standard laser light is employed as the laser light emitted from the optical pickup device 30. Similarly, any of these is adopted as the standard of the optical disk rotated by the spindle motor 61.

The optical pickup supporting device 10 having such a configuration is housed in a housing having a predetermined shape, whereby an optical disc device is configured.

The chassis 12 is formed into a frame shape or a frame shape by, for example, pressing a metal material, and integrally supports each component of the optical pickup support device 10. Here, the chassis 12 made of a metal material will be described as an example, but the chassis 12 made of a resin material may be used. Resin materials include polycarbonate, modified polyphenylene ether (modified PPE: modified-polyphenylene ether), ABS resin (acrylonitrile), butadiene (Butadiene), and styrene (Styrene). Adopted. Further, a resin material filled with glass fibers may be employed as the material of the chassis 12. Further, the shape of the chassis 12 is not limited to that shown in the figure. For example, in the four corners of the chassis 12, notches for attaching the chassis 12 to the housing of the optical disk device by fastening means such as screws are provided. There is also. A spindle motor unit 50 is fixed to the end of the chassis 12.

The first guide shaft 14 and the second guide shaft 16 are fixed to the chassis 12 and support the optical pickup device 30 so as to be movable in the radial direction (radial direction: Dr direction) of the optical disc. Therefore, the first guide shaft 14 and the second guide shaft 16 are disposed in parallel with the radial direction of the optical disc in a plan view and also in parallel with the information recording surface of the optical disc. The first guide shaft 14 and the second guide shaft 16 are made of a metal material such as cylindrical stainless steel. Here, the first guide shaft 14 may be referred to as a main (guide) shaft, and the second guide shaft may be referred to as a sub (guide) shaft. Furthermore, the guide shaft may be referred to as a shaft.

One end of the first guide shaft 14 on the spindle motor 61 side is fixed in contact with a first fixing portion 51 provided in the spindle motor unit 50, and is pressed by the fixing member 13a to be fixed to the chassis 12. Here, the fixing member 13 is, for example, a leaf spring attached to the chassis 12. The other end of the first guide shaft 14 is supported by a third fixing portion 53 provided integrally with the chassis 12, and is pressed and fixed by a fixing member 13b. The fixing member 13b is, for example, a metal wire spring (wire spring).

One end of the second guide shaft 16 on the spindle motor 61 side is fixed in contact with a second fixing portion 52 provided in the spindle motor unit 50 and is fixed to the chassis 12 by being pressed by the fixing member 13b. The other end of the second guide shaft 16 is supported by a fourth fixing portion 54 provided integrally with the chassis 12 and is pressed and fixed by the fixing member 13b. Thus, one end of the first guide shaft 14 and the second guide shaft 16 is fixed to the chassis 12 via the first fixing portion 51 and the second fixing portion 52 of the spindle motor unit 50, and the other end is the third. The fixing portion 53 and the fourth fixing portion 54 are directly fixed to the chassis 12.

The spindle motor unit 50 includes a motor support substrate 56, a spindle motor 61, a turntable 62, a first fixing portion 51, and a second fixing portion 52, and holds and rotates the optical disk.

The motor support substrate 56 is formed by pressing a plate-like metal material into a predetermined shape by pressing or the like, and supports the spindle motor 61.

The spindle motor 61 is fixed to the motor support substrate 56 so as to be rotatable about the rotation shaft 58, and a turntable 62 is provided on the upper surface. The turntable 62 holds the optical disk by a chucking mechanism or the like, and rotates the optical disk at a predetermined speed as the spindle motor 61 rotates. The turntable 62 and the rotation shaft 58 of the spindle motor 61 coincide with each other and become the rotation shaft of the optical disk.

One end of the first guide shaft 14 is pressed and fixed to the first fixing portion 51 by the fixing member 13a to the first fixing portion 51, and one end of the second guide shaft 16 is fixed to the second fixing portion 52 by the fixing member 13b. The second fixing portion 52 is pressed and fixed. Details of the spindle motor unit 50 will be described later.

The optical pickup device 30 includes a housing 36, an actuator 37 that supports the objective lens 32, a connector 34 that is an input / output terminal of the optical pickup device 30, and guide

portions

38 and 39 provided at both left and right ends of the housing 36. I have. Various optical elements housed in the housing 36 are connected to a main circuit board built in a housing of the optical disk device via a connector 34 and a flexible wiring board (not shown).

In the optical pickup device 30, a light emitting chip, a light receiving chip and other optical elements are housed in a housing 36 in which a resin is molded into a predetermined shape. The vicinity of both ends of the housing 36 of the optical pickup device 30 is held by the first guide shaft 14 and the second guide shaft 16 so as to be movable in the radial direction (Dr direction) of the optical disc.

The guide portion 38 is a hole provided by injection molding of a resin material integrally with the housing 36, and the first guide shaft 14 is inserted therethrough. The guide unit 38 not only supports the optical disc while allowing the optical disc to move in the radial direction (Dr direction), but also regulates the movement of the optical disc in the tangential direction (tangential direction: Dt direction) perpendicular to the radial direction. It also has a function. Therefore, the inner diameter of the guide portion 38 is set to a length that allows movement in the direction along the first guide shaft 14 and suppresses rattling.

The guide portion 39 is provided at an end portion of the housing 36 facing the guide portion 38, and has a U-shape or a U-shape that opens outward. The second guide shaft 16 is engaged or inserted into the guide portion 39.

Referring to FIG. 1B, the motor support board 56 is fixed to the chassis 12 by fixing means 59 such as screws. The first fixing portion 51 and the second fixing portion 52 are provided by integrally bending a part of the motor support substrate 56 so as to sandwich the first fixing portion 51 and the second fixing portion 52 in the vicinity of the spindle motor 61.

The drive unit 40 that drives the optical pickup device 30 in the radial direction (Dr direction) of the optical disk includes a thread motor 41, a lead screw 42, and an engaging portion (rack) 43. The lead screw 42 is disposed in parallel with the first guide shaft 14 and the second guide shaft 16, and a guide groove 44 is formed in a spiral shape on the outer surface of the lead screw 42, and one end thereof is connected to the thread motor 41. Has been. On the other hand, the tip end portion of the engaging portion (rack) 43 fixed to the housing 36 of the optical pickup device 30 is urged (pressed) to engage with the guide groove 44 of the lead screw 42. Accordingly, when the tracking signal is applied to the sled motor 41, the lead screw 42 is rotated by a predetermined angle. A force that moves along the axial direction of the lead screw 42 acts on the engaging portion 43 that engages with the guide groove 44 of the lead screw 42. As a result, the optical pickup device 30 fixed to the engaging portion 43 moves by a predetermined amount while being supported by the first guide shaft 14 and the second guide shaft 16.

The skew adjusting member 17 for adjusting the skew in the radial direction (Dr direction) of the turntable 62 is provided on the back surface side in the vicinity of the second fixing portion 52, the third fixing portion 53, and the fourth fixing portion 54. The skew adjusting member 17 is, for example, a screw, and is screwed into a screw hole provided in the chassis 12, and the tip of the screw is the end of the first guide shaft 14 near the second fixing portion 52, the third fixing portion 53, and The both ends of the second guide shaft 16 in the vicinity of the fourth fixed portion 54 are in contact with each other. The first guide shaft 14 and the second guide shaft 16 are pressed toward the main surface of the chassis 12 by the fixing

members

13a and 13b in the vicinity of the second fixing portion 52, the third fixing portion 53, and the fourth fixing portion 54 ( By adjusting the position of the skew adjusting member 17 by tightening a screw, the skew adjustment in the radial direction (Dr direction) of the optical disc can be performed.

2 and 3, the configuration of the spindle motor unit 50 incorporated in the optical pickup support device 10 will be described. FIGS. 2A and 2B are perspective views showing a state in which the spindle motor unit 50 is attached to the chassis, and FIG. 2A is a perspective view when the turntable 62 faces the upper surface. FIG. 3B is a perspective view in which FIG. In addition, only the main part required for description is shown in both figures, and the detail may be abbreviate | omitted. 2C and 2D are cross-sectional views of the spindle motor unit 50 corresponding to the cross section taken along the line aa in FIG. FIG. 3 is a cross-sectional view illustrating the traveling surface R.

2A and 2B, the spindle motor unit 50 includes a motor support substrate 56 formed by pressing a plate-like metal material into a predetermined shape by press working, and the motor support substrate 56 being rotatable. The spindle motor 61, the first fixing portion 51, and the second fixing portion 52 are provided.

The first fixing portion 51 and the second fixing portion 52 are provided by bending a part of the motor support substrate 56 in a direction perpendicular to the main surface of the turntable 62 (focusing direction: Df direction). The second guide shaft 15 is supported and fixed.

Further, although not shown, a motor wiring board provided with a wiring through which a current for driving the spindle motor 61 passes is provided on the main surface of the motor support board 56 and a flexible wiring connected to the wiring of the motor wiring board. A substrate is placed. The motor support board 56 is provided with a plurality of holes for fixing to the chassis 12 and fixed by fixing means 59 such as screws (FIG. 2B).

The configuration of the spindle motor unit 50 will be described with reference to FIGS. 2C is a cross-sectional view of the spindle motor unit 50 alone, and FIG. 2D is a cross-sectional view when attached to the chassis 12.

The spindle motor 61 will be described with reference to FIG. In the spindle motor 61, the rotary shaft fixing member 70 is fixed to a concave portion in which the motor support substrate 56 is partially recessed, and a plurality of drive coils 68 are fixed. The rotary shaft fixing member 70 has a built-in bearing 72, and the rotary shaft 58 is supported by the bearing 72.

The rotor 64 is fitted and fixed to the rotary shaft 58 and rotates integrally with the rotary shaft 58. A ring-shaped magnet 66 is bonded and fixed to the inner surface of the rotor 64. A turntable 62 is provided on the upper surface of the spindle motor 61, and a main surface 62 s of the turntable 62 is a surface with which the main surface of the optical disk comes into contact, and rotates together with the rotor 64. The centering member 60 has a chucking function. By fitting a hole provided in the center of the optical disc into the centering member 60, the position in the main surface direction of the optical disc is set to a predetermined position.

In the spindle motor 61 having such a configuration, when a drive signal is supplied to the drive coil 68 from a motor drive circuit incorporated in a motor wiring board or the like, a magnetic force induced from the drive coil 68 and a magnetic force generated from the magnet 66 are generated. To generate a rotational force on the rotor 64. As a result, the rotor 64 rotates about the rotation shaft 58.

When the rotating shaft 58 is rotated by the rotational driving force generated in the rotor 64, the turntable 62 fitted and fixed to the rotating shaft 58 rotates, so that the optical disk placed on the turntable 62 can be rotated. . Then, by controlling the magnitude of the drive signal supplied to the drive coil 68, the interval between drive pulses, and the like, the rotation speed of the optical disk can be controlled to a desired rotation speed.

2C and 2D, the first fixing portion 51 and the second fixing portion 52 bend the end portion of the motor support substrate 56 made of a metal material at a right angle in the focusing direction (Df direction), that is, the motor support. This is a portion provided integrally with the substrate 56. The first fixing portion 51 and the second fixing portion 52 are provided in the vicinity of the spindle motor 61 at a position sandwiching them. Each of the first fixing portion 51 and the second fixing portion 52 is, for example, L-shaped in this cross-sectional shape, and the first guide shaft 14 and the second guide shaft 16 are mounted in contact with each other when attached to the chassis. The first guide shaft 14 is pressed and fixed to the first fixing portion 51 by the fixing member 13a, and the second guide shaft 16 is pressed and fixed to the second fixing portion 52 by the fixing member 13b.

More specifically, the first guide shaft 14 has a circular cylindrical shape in this cross section, and is mounted so that a part of the cylindrical surface is in contact with the first contact surface 51 f of the first fixing portion 51. Similarly, the second guide shaft 16 has a cylindrical shape with a cross section, and is mounted so that a part of the cylindrical surface is in contact with the second contact surface 52 f of the second fixing portion 52. In FIG. 2, the heights of the first contact surface 51f and the second contact surface 52f in the focusing direction are different, but these heights may be the same.

The spindle motor unit 50 is determined by the first guide shaft 14 to be fixed to the first fixing portion 51 and the second guide shaft 16 to be fixed to the second fixing portion 52 when attached to the chassis. The rotating shaft 58 of the turntable 62 is substantially perpendicular to the traveling surface R (dashed line) of the optical pickup device. In other words, the spindle motor unit 50 adjusts a plane parallel (horizontal) to the traveling surface R of the optical pickup device 30 by a method of adjustment described in detail later (hereinafter referred to as a vertical axis) for securing the vertical axis. As the reference plane S), adjustment is made so that the axis of the rotary shaft 58 is secured (FIG. 2D).

Here, the term “substantially perpendicular” refers to a state in which the rotation shaft 58 is perpendicular to the traveling surface R of the optical pickup device 30 and a state in which an angular deviation occurs within a range of 0.15 degrees from the perpendicular case. . Further, “substantially vertical” means that the optical disk is substantially vertical in both the tangential direction (Dt direction) of the optical disk and the radial direction (Dr direction) of the optical disk.

In the case of the configuration having the radial skew adjusting member 17, the spindle motor unit 50 may be secured only in the tangential direction. In that case, the skew adjustment member 17 performs radial skew adjustment after the spindle motor unit 50 is attached to the chassis 12.

That is, the spindle motor unit 50 according to the present embodiment does not ensure that the rotary shaft 58 is perpendicular to the main surface 56s of the motor support substrate 56 to which the spindle motor 61 is attached as shown in FIG. As a single component, a rotation axis with respect to the traveling surface R of the optical pickup device 30 determined by the first guide shaft 14 and the second guide shaft 16 (a surface parallel to the traveling surface R is defined as an axial reference surface R). 58 shafts are secured. As a result, only by attaching the spindle motor unit 50 to the chassis 12, the running surface R of the optical pickup device 30 can be made horizontal with respect to the main surface 62 s of the turntable 62 without adjusting the skew in the tangential direction (Dt direction). That is, it can be horizontal with respect to the information recording surface of the optical disc.

Further, the first fixing portion 51 and the second fixing portion 52 of the present embodiment are L-shaped having

side walls

51v and 52v, respectively, and the first guide shaft 14 also abuts on the side wall 51v of the first fixing portion 51. Then, the rotation shaft 58 of the spindle motor 61 (turn table 62) is adjusted by the method described later so as to ensure the shaft suspension with respect to the traveling surface of the optical pickup device. The positional relationship (horizontal distance) between the first guide shaft 14 and the rotation shaft 58 to be fixed is also accurately positioned. That is, the normal distance L from the rotation shaft 58 to the first guide shaft 14 can be accurately ensured by bringing the first guide shaft 14 into contact with and fixed to the side wall 51v of the first fixing portion 51.

The traveling surface R will be further described with reference to FIG. 3 and FIG. FIG. 3 is a schematic view of the vicinity of the first fixing portion 51 and the second fixing portion 52, and details of the spindle motor 61 are omitted.

More specifically, the traveling surface R of the optical pickup device 30 includes three points, that is, an outer reference point 14o and an inner reference point 14i of the first guide shaft 14, and an inner reference point 16i of the second guide shaft 16. The surface to be determined.

Here, the inner reference point 14 i of the first guide shaft 14 is directly below the one end 38 i on the spindle motor 61 side of the guide portion 38 when the optical pickup device 30 is closest to the spindle motor 61 in FIG. The center point of the cylinder of the 1st guide shaft 14 located in this. Further, the outer reference point 14o of the first guide shaft 14 is one end 38o on the side of the guide portion 38 that is separated from the spindle motor 61 when the optical pickup device 30 is closest to the spindle motor 61 in FIG. The center point of the cylinder of the 1st guide shaft 14 located just below. Further, the inner reference point 16i of the second guide shaft 16 is located, for example, immediately below the center point 39c of the guide portion 39 when the optical pickup device 30 is closest to the spindle motor 61 in FIG. 2 Refers to the center point of the cylinder of the guide shaft 16.

Since the first guide shaft 14 and the second guide shaft 16 have a cylindrical shape with the same diameter, the inner reference point 14i, the outer reference point 14o and the inner reference point 16i are respectively the first guide shaft 14 and the second guide shaft 16i. It can be said that the point is in the position moved in the extending direction of the shaft 16. That is, referring to FIG. 1A and FIG. 3B, the inner reference point 14i of the first guide shaft 14 is the center point of the first guide shaft 14 closest to the first fixing portion 51, and is the outer side. The reference point 14 o can be said to be the center point of the first guide shaft 14 that is closest to the third fixing portion 53. The inner reference point 16 i of the second guide shaft 16 can be said to be the center point of the second guide shaft 16 that is closest to the second fixing portion 52. That is, the center points (

inner reference points

14i, 16i and outer sides) at the positions where the first fixing portion 51, the second fixing portion 52, the third fixing portion 53, the first guide shaft 14, and the second guide shaft 16 abut. The surface uniquely determined including the reference point 14o) becomes the traveling surface R.

Here, as shown in FIG. 3, when the heights of the first guide shaft 14 and the second guide shaft 16 in the focusing direction (Df direction) are different, one of the guide shafts is shifted vertically to the focusing direction, The heights of the guide shaft 14 and the second guide shaft 16 are made to coincide with each other to serve as the reference point. That is, for example, in FIG. 3, the second guide shaft 16 is shifted perpendicularly to the focusing direction so that the heights of the first guide shaft 14 and the second guide shaft 16 coincide with each other and the inner reference point 16 i of the second guide shaft 16. And

As described above, in this embodiment, in the single component of the spindle motor unit 50, the outer reference of the first guide shaft 14 and the second guide shaft 16 to be respectively fixed to the first fixing portion 51 and the second fixing portion 52 later. The rotation axis 58 is substantially perpendicular to a plane including the three points of the point 14o, the inner reference point 14i, and the inner reference point 16i.

Conventionally, as shown in FIG. 9, a spindle motor unit 100 in which the rotation axis 108 is secured to the main surface 101s of the motor support substrate 101 is fixed to a chassis in which a first guide shaft 112a and a second guide shaft 112b are fixed. 110 was attached. That is, in the spindle motor unit 100, the vertical axis of the rotary shaft 108 is adjusted with the main surface 101s of the motor support substrate 101 as the vertical axis reference plane S as a single component. However, since the traveling surface R of the optical pickup device formed by the first guide shaft 112a and the second guide shaft 112b is determined by the chassis 110 separate from the spindle motor unit 100, for example, it rotates as the spindle motor unit 100. Even if the vertical axis of the shaft 108 is secured, the vertical axis is not guaranteed for the traveling surface R of the optical pickup device. For this reason, after the spindle motor unit 100 is mounted on the chassis 110, a tangential skew adjustment step by skew adjustment means (components) is required.

In contrast, as shown in FIGS. 2 and 3, the spindle motor unit 50 of the present embodiment is a plane including three points of the outer reference point 14o, the inner reference point 14i, and the inner reference point 16i (the travel of the optical pickup device 30). A surface parallel to the surface R) is defined as an axial reference plane S, and the vertical axis of the rotary shaft 58 is secured. Therefore, only by attaching the spindle motor unit 50 to the chassis 12, the traveling surface R of the optical pickup device 30 can be made horizontal with respect to the main surface 62s (information recording surface of the optical disk) of the turntable 62. That is, the skew relative to the tangential direction of the main surface 62s of the turntable 62 can be minimized without adjusting the skew deviation amount in the tangential direction (Dt direction) of the main surface 62s of the turntable 62 with respect to the assembled optical pickup device 30. No preparation parts are required.

The spindle motor unit 50 is adjusted so that not only the tangential direction (Dt direction) of the optical disk but also the radial direction (Dr direction) is substantially vertical when the rotary shaft 58 is adjusted. After that, the skew adjustment in the radial direction may be performed by the skew adjustment member 17 (see FIG. 1B).

However, even if the radial skew is adjusted by the adjustment member 17 in the second fixing portion 52, the second guide shaft 16 is not separated from the second fixing portion 52. That is, the skew adjustment in the radial direction is performed in a state where they are not separated (a state where the tangential axis is secured).

Here, the running surface R of the optical pickup device 30 is a plane including the three points of the outer reference point 14o and the inner reference point 14i of the first guide shaft 14 and the inner reference point 16i of the second guide shaft 16 as described above. It is determined uniquely. That is, the outer reference point 16o of the second guide shaft 16 (the center point of the second guide shaft 16 closest to the fourth fixed portion 54: see FIG. 1A) is deviated from the traveling surface R, and the chassis In some cases, skew deviation in the tangential direction (Dt direction) depending on the accuracy of 12 (± 0.05 mm) may occur.

However, the amount of skew deviation at the outer reference point 16o of the second guide shaft 16 is 0.058 degrees (tan-1 (0.05 / 49)) by rough calculation, and the adjusted rotation shaft 58 is within the allowable range. Even in the case of the largest angle deviation (angle deviation amount: 0.15 degrees), the total tangential skew deviation amount is 0.208 degrees. In the case of the optical pickup device 30 that generally has high performance, the allowable range of skew deviation in the entire optical pickup support device 10 is up to about ± 0.35 degrees in both the radial direction and the tangential direction. That is, even if the outer reference point 16o of the second guide shaft 16 is affected by the distortion of the chassis 12, the problem falls because the entire optical pickup support device 10 falls within the allowable skew deviation range. Absent.

Note that the shapes of the first fixing portion 51 and the second fixing portion 52 are not limited to the L-shape shown in FIG. 2, but are a groove (U-shape) opened in the focusing direction or a tangential direction (Dt direction). An open groove (C-shaped) shape may be used. The

side walls

51v and 52v may not be provided. However, as long as the shape has at least a portion with which the first guide shaft 14 abuts in the tangential direction, such as a U-shape or a C-shape, the method described above is used. The line distance L can also be secured accurately, which is desirable.

Next, a method for adjusting the rotating shaft 58 of the spindle motor unit 50 will be described with reference to FIG. FIG. 4 is a cross-sectional view showing a part of the adjustment jig 150 of the rotating shaft 58 and the spindle motor unit 50.

The adjustment jig 150 includes a reference surface (axial reference surface S) at the time of adjustment, and a first position receiving portion 151 and a second position receiving portion 152 provided along the reference surface. The first position receiving portion 151 includes a first contact portion 151 c having a shape corresponding to a part of the first guide shaft 14. Specifically, the first contact portion 151c has a shape that matches a part of the cylindrical surface of the cylindrical first guide shaft 14, and is a cylinder or a sphere having the same diameter as the diameter of the column of the first guide shaft 14. For example, at least a part of each has a shape cut out in a semicircular shape in the cross section of FIG.

Similarly, the second positioning receiving portion 152 includes a second contact portion 152c having a shape corresponding to a part of the second guide shaft 16, for example, a cylinder or a sphere having the same diameter as the diameter of the column of the second guide shaft 16. For example, at least a part of each has a shape cut out in a semicircular shape in the cross section of FIG.

Further, the first position receiving portion 151 or the second position receiving portion 152 is provided with a third abutting portion 156 having a surface parallel (horizontal) to the axial reference plane S. That is, here, the case where the third contact portion 156 is provided in the first position receiving portion 151 will be described, but it may be provided in the second position receiving portion 152.

The adjustment method is as follows.

First, the adjustment jig 150 is placed on the spindle motor unit 50, and the first contact portion 151c of the first position receiving portion 151 and the second contact portion 152c of the second position receiving portion 152 are respectively set. The first abutment surface 51f of the first fixing portion 51 and the second abutment surface 52f of the second fixing portion 52 are abutted. At this time, the first contact portion 151 c is also brought into contact with the side wall 51 v of the first fixing portion 51.

Furthermore, the third contact portion 156 is brought into contact with a part of the main surface 56s of the motor support substrate 56 (a portion extending outward from the first fixing portion 51). Accordingly, the first fixing portion 51 to which the first guide shaft 14 is to be fixed, the second fixing portion 52 to which the second guide shaft 16 is to be fixed, and the motor support substrate 56 are perpendicular to the vertical reference plane S. They are arranged at a predetermined distance (h1, h2, h3) in the (Df direction). That is, in a state where the first guide shaft 14 and the second guide shaft 16 are fixed to the first fixing portion 51 and the second fixing portion 52, the spindle motor unit 50 is moved with respect to the adjustment jig 150 (axis perpendicular reference plane S). Can be placed in the correct position.

Next, adjustment is performed so that the rotation shaft 58 of the turntable 62 is substantially perpendicular to the axial reference plane S of the adjustment jig 150. That is, the reflecting jig 153 is disposed on the turntable 62, and laser light is projected from above the origin O of the adjusting jig 150 as indicated by an arrow. Then, the degree of deviation of the laser beam reflected by the reflecting jig 153 from the origin O is adjusted by the autocollimator device while adjusting the verticality of the rotating shaft 58.

At this time, the turntable 62 is adjusted to be substantially vertical in both the radial direction (Dr direction) and the tangential direction (Dt direction). The tolerance of the perpendicularity with respect to the axial reference plane S is within a range inclined by 0.15 degrees from the vertical.

FIG. 5 is a schematic diagram showing the screen of the autocollimator before and after adjustment, FIG. 5 (A) shows the screen before adjustment, and FIG. 5 (B) shows the screen after adjustment. In the figure, the X direction is a deviation in the radial direction (Dr direction), and the Y direction is a deviation in the tangential direction (Dt direction). A circle around the origin O indicates the amount of deviation from the origin O.

Referring to FIG. 5A, before adjustment, when the locus T (substantially circular) of the reflected light from the reflecting jig 153 is recognized at the position (X1, Y1), the rotation shaft 58 is set to the origin. That is, there is a deviation of 0.15 degrees or more in the radial direction and tangential direction from O.

Therefore, the rotary shaft 58 is adjusted as shown in FIG. 5B so that the locus R of the reflected light approaches the origin O. In the present embodiment, the allowable range of angular deviation at this time is set to a range tilted at most 0.15 degrees from the origin O (vertical).

As a result, the rotary shaft 58 of the turntable 62 is adjusted to be substantially perpendicular to the vertical reference plane S in a state where the spindle motor unit 50 is disposed at an accurate position with respect to the vertical reference plane S of the adjustment jig 150. can do.

In this embodiment, the shape of the first contact portion 151c and the second contact portion 152c is a shape corresponding to the first guide shaft 14 and the second guide shaft 16, that is, a shape corresponding to a part of them. During adjustment, first, the first contact portion 151c, the second contact portion 152c, and the third contact portion 156 are at least point-contacted with the first fixing portion 51, the second fixing portion 52, and the main surface 56s, respectively. Thus, the spindle motor unit 50 is disposed at an accurate position with respect to the adjustment jig 150 (axial reference plane S). Thereby, for example, when the first fixing portion 51 and the second fixing portion 52 (the first contact surface 51f and the second contact surface 52f) and the motor support substrate 56 have processing variations. Also, at least the first contact portion 151c and the first contact surface 51f, the second contact portion 152c and the second contact surface 52f, and the third contact portion 156 and the main surface 56s, which are in point contact with each other, respectively. The plane containing the three contact points is uniquely determined. That is, by bringing the first contact portion 151c, the second contact portion 152c, and the third contact portion 156 into contact with the corresponding positions of the spindle motor unit 50, each spindle motor unit 50 is brought into contact with the first guide shaft. 14 and the second guide shaft 16 are reproduced, while the spindle motor unit 50 is accurately positioned with respect to the adjustment jig 150 (axis reference plane S) from the axis reference plane S to the first contact portion. 151c, the second contact portion 152c, and the third contact portion 156 can be arranged at positions h1, h2, and h3, respectively. Then, the traveling surface R determined by the first guide shaft 14 and the second guide shaft 16 is parallel to the axial reference surface S by adjusting the rotation shaft 58 substantially perpendicular to the axial reference surface S. Can be (horizontal).

In addition, if the 1st fixing | fixed part 51 and the 2nd fixing | fixed part 52 are smooth surfaces, it will not provide the 1st contact part 51c and the 2nd contact part 52c which protruded, but the flat 1st position receiving part 151 and 1st The two-position receiving portion 152 may be brought into contact with the first fixing portion 51 and the second fixing portion 52. In this case, for example, the contact surface with the first fixed portion 51 of the first position receiving portion 151 or the contact surface with the second fixed portion 52 of the second position receiving portion 152 is the vertical reference plane. S.

Then, an optical pickup support device is manufactured using the spindle motor unit 50 adjusted in this way. Hereinafter, a method for manufacturing an optical pickup supporting device will be described mainly with reference to FIGS. 1 and 2 again. First, as shown in FIG. 5B, a spindle motor unit 50 with a rotating shaft 58 adjusted is prepared, and a chassis is prepared. The motor support board 56 of the spindle motor unit 50 is fixed to the end portion of the spindle 12 with screws or the like.

Next, after the first guide shaft 14 is inserted through the guide portion 38 of the optical pickup device 30, one end of the first guide shaft 14 is brought into contact with the first fixing portion 51 and is fixed by a fixing member 13a (for example, a leaf spring). To do. The first guide shaft 14 also abuts on the side wall 51v of the first fixed portion 51, and thereby the normal distance L from the rotation shaft 58 of the spindle motor 61 is accurately regulated (FIG. 1 (A), FIG. 2). (D)). Further, the other end of the first guide shaft 14 is fixed to a third fixing portion 53 provided in the chassis 12 (FIG. 1A).

Next, after engaging the second guide shaft 16 with the guide portion 39 of the optical pickup device 30, one end of the second guide shaft 16 is brought into contact with the second fixing portion 52 and pressed and fixed by the fixing member 13b (FIG. 1 (A), FIG. 2 (D)), the other end of the second guide shaft 16 is fixed to a fourth fixing portion 54 provided in the chassis 12 (FIG. 1A).

The spindle motor unit 50 is disposed on the traveling surface R of the optical pickup device 30 formed by both shafts in a state where the first guide shaft 14 and the second guide shaft 16 are fixed to the first fixing portion 51 and the second fixing portion 52. On the other hand, the same shape as that of a part of the first guide shaft 14 and the second guide shaft 16 so that the rotation shaft 58 of the turntable 62 is substantially perpendicular (based on an axial reference surface S parallel to the traveling surface R). It is adjusted by the adjusting jig 150 having

Therefore, with the spindle motor unit 50 attached to the chassis 12, the rotation shaft 58 of the turntable 62 is secured to the running surface R of the optical pickup device 30. A skew adjustment step in the tangential direction is not necessary.

For the radial direction of the turntable 62, a skew adjustment process is performed in which the skew adjustment member 17 is rotationally adjusted as necessary to finely adjust the positions of the end portions of the first guide shaft 14 and the second guide shaft 16. In the radial skew adjustment, the first guide shaft 14 is fixed in the first fixing portion 51, and the second fixing portion 52 and the second guide shaft 16 are kept in contact with each other in the second fixing portion 52. In this state, the skew is adjusted by the skew adjusting members 17 of the second fixing portion 52, the third fixing portion 53, and the fourth fixing portion 54. Accordingly, the perpendicularity of the rotating shaft 58 of the turntable 62 with respect to the traveling surface R of the optical pickup device 30 is maintained.
Thereby, the optical pick-up support apparatus 10 shown in FIG. 1 can be obtained.

A second embodiment of the present invention will be described with reference to FIG.

FIG. 6A is a perspective view corresponding to FIG. 1B of the optical pickup support device 10 of the second embodiment. 6B is a cross-sectional view taken along the line bb of FIG. 6A, where the first guide shaft 14 and the second guide shaft 16 are placed so as to be positioned above the chassis 12 (see FIG. 6B). Front side). Since the front side is the same as FIG. 1A, the illustration is omitted, the same components are denoted by the same reference numerals, and the description thereof is also omitted.

If the actuator 37 of the optical pickup device 30 can adjust the skew in the radial direction (Dr direction) of the optical disc, the skew adjustment in the radial direction (Dr direction) of the turntable 62 in the optical pickup support device 10 is also unnecessary. Accordingly, the skew for adjusting the skew in the radial direction of the turntable 62 provided at the position indicated by the broken-line circle in FIG. 6 (near the back side of the second fixing portion 52, the third fixing portion 53, and the fourth fixing portion 54). The adjustment member 17 becomes unnecessary.

That is, in the manufacturing process of the optical pickup support device 10, as shown in FIG. 6B, the end portion of the first guide shaft 14 is arranged on the third fixing portion 53 and is fixed by the fixing member 13b so as to come into contact therewith. To do. In addition, one end of the second guide shaft 16 is disposed on the second fixing portion 52 and is pressed and fixed by the fixing member 13 so that they are in contact with each other, and the other end of the second guide shaft 16 is disposed on the fourth fixing portion 54. Then, they are pressed and fixed so that they come into contact with each other.

Since the fine adjustment of the first guide shaft 14 and the second guide shaft 16 by the adjusting member 17 is not necessary, the third fixing portion 53 and the fourth fixing portion 54 respectively in the state where the optical pickup support device 10 is completed. The contact between the first guide shaft 14 and the second guide shaft 16 is maintained.

Still referring to FIG. 7, a third embodiment will be described. In the first and second embodiments, a screw may be employed as the fixing member 13 for the first guide shaft 14 and the second guide shaft 16. FIG. 7 is a cross-sectional view of the spindle motor 61 portion for explaining the case where the first guide shaft 14 and the second guide shaft 16 are fixed by the screws 13.

The first guide shaft 14 is disposed so as to contact the first contact surface 51f and the side wall 51v of the first fixing portion 51, and the second guide shaft 16 is disposed on the second contact surface 52f and the side wall of the second fixing portion 52. It arrange | positions so that 52v may each contact | abut. Then, the screw 13 to be screwed into the screw hole provided in the motor support substrate 56 is tightened, and the end portion of the first guide shaft 14 and the end portion of the second guide shaft 16 are sandwiched between the side surface and the head portion of the screw 13. To fix.

Similarly, the other end of the first guide shaft 14 is disposed in a third fixing portion 53 provided in the chassis 12 and fixed so as to come into contact with the second guide shaft 16 by tightening the fixing member 13. The end is disposed on a fourth fixing portion 54 provided on the chassis 12 and is fixed so as to come into contact with the fixing member 13 by tightening. The sectional view in this case is the same as FIG.

In the tightened state, both ends of the first guide shaft 14 and the second guide shaft 16 contact the first fixing portion 51, the second fixing portion 52, the third fixing portion 53, the fourth fixing portion 54 and the screw 13. The first guide shaft 14 and the second guide shaft 16 can be sufficiently fixed by selecting the shape of the screw 13 so as to be sandwiched in contact therewith.

Alternatively, screw holes may be provided at positions corresponding to the screw holes of the motor support substrate 56 in the chassis 12, and the fixing member 13 may be used also as a fixing member for fixing the motor support substrate 56 and the chassis 12. Thereby, reduction of the number of parts of a fixing member and simplification of a process are realized.

Furthermore, with reference to FIG. 8, the 4th Embodiment of this invention is shown. FIG. 8A is a cross-sectional view illustrating a part of the spindle motor unit 50 for explaining the fourth embodiment, and FIG. 8B is a cross-sectional view illustrating a method for adjusting the spindle motor unit 50. It is.

8A, the first fixing portion 51 and the second fixing portion 52 are formed by bending a part of the motor support substrate 56 twice, for example, in an L shape in this cross section. The side wall 51v of the first fixing portion 51 is a portion where the motor support substrate 56 is raised substantially perpendicular to the focusing direction (Df direction), and the first contact surface 51f of the first fixing portion 51 is the portion of the side wall 51v portion. This is a portion where the tip is further bent substantially perpendicular to the tangential direction (Dt direction). Similarly, in the second fixing portion 52, a side wall 52v and a second contact surface 52f are formed.

In the fourth embodiment, the first fixed portion 51 and the second fixed portion 52 are arranged on the first guide shaft 14 and the second guide shaft 16 in this cross section, and are hung on both guide shafts. Is fixed.

The fixing member 13 is, for example, a screw, and is fixed to the first fixing portion 51 by sandwiching the first guide shaft 14 vertically and horizontally between its head and side surfaces. The fixing member 13 is also used for fixing the chassis 12 and the motor support substrate 56.

The spindle motor unit 50 has a running surface that is parallel (horizontal) to the running surface R of the optical pickup device determined by the first guide shaft 14 and the second guide shaft 16 as an axis reference plane S at the time of adjustment. The axis of the rotary shaft 58 is secured with respect to R.

In this case, as shown in FIG. 8B, in the adjustment process of the spindle motor unit 50, the first position receiving jig 151 and the second position receiving jig 152 are provided on the shaft reference plane S, and the first position receiving jig 152 is provided. The first abutting portion 151c of the positioning receiving jig 151 and the second abutting portion 152c of the second positioning receiving jig 152 are adjusted using the adjustment jig 150 provided so as to protrude upward. The spindle motor unit 50 is disposed on the first position receiving jig 151 and the second position receiving jig 152. At this time, the first fixing portion 51 and the first contact portion 51c, the second fixing portion 52, the second contact portion 52, the third contact portion 156, and the other main surface 56S ′ (main surface) of the motor support substrate 56 The spindle motor unit 50 is disposed at an accurate position with respect to the vertical reference plane S by making at least point contact with a part (a portion extending outward from the first fixed portion 51) of a part (facing surface of 56s). it can. In this state, the rotary shaft 58 of the turntable 62 is adjusted so as to be substantially perpendicular to the axis-down reference plane S. Thereby, the same effect as the above-described embodiment can be obtained.

The remaining configuration is the same as that of the first to third embodiments, and a detailed description thereof will be omitted.

Thus, in the present invention, the motor support substrate 56 of the spindle motor unit 50 is determined not by the shaft reference plane when adjusting the shaft but by the first guide shaft 14 and the second guide shaft 16. The perpendicularity of the rotating shaft 58 of the spindle motor 61 (turn table 62) was adjusted with the traveling surface R of the optical pickup device 30 parallel to the axial reference surface S (with respect to the traveling surface R of the optical pickup device 30). The present invention provides a spindle motor unit 50 in which the vertical axis of the rotating shaft 58 is secured, an optical pickup support device 10 using the same, and an optical disk device using the same. Further, when adjusting the perpendicularity of the rotation shaft 58 of the spindle motor 61 (turn table 62) of the spindle motor unit 50, the running surface R of the optical pickup device 30 determined by the first guide shaft 14 and the second guide shaft 16 is determined. The vertical axis of the rotary shaft 58 is adjusted using an adjustment jig 150 having a plane parallel to (horizontal) as a reference plane (the vertical axis of the rotary shaft 58 is ensured with respect to the running surface R of the optical pickup device 30). ) A method of adjusting the spindle motor unit 50 and a method of manufacturing the optical pickup support device 10 using the same are provided.

Specifically, the spindle motor unit 50 is provided with a first fixing portion 51 and a second fixing portion 52 with which the first guide shaft 14 and the second guide shaft 16 to be fixed later come into contact. A first position receiving jig 151 and a second receiving jig 152 corresponding to the shapes of the first guide shaft 14 and the second guide shaft 16 are provided, and a surface parallel to the running surface R of the optical pickup device 30 is provided. The first and second

positioning receiving jigs

151 and 152 are brought into contact with the first fixing part 51 and the second fixing part 52, respectively, using the adjustment jig 150 having the axis reference plane S, and the spindle motor unit 50 The rotary shaft 58 of the turntable 62 is adjusted so as to be substantially perpendicular to the axial reference surface S (running surface R).

Thus, after the spindle motor unit 50 is attached to the chassis 12 of the optical pickup support device 10, the tangential skew adjustment process of the turntable 62 can be eliminated, and the tangential skew adjustment component can be eliminated.

DESCRIPTION OF SYMBOLS 10 Optical pick-up support apparatus 12

Chassis

13, 13a, 13b Fixing member 14 1st guide shaft 16 2nd guide shaft 38 Guide part 39 Guide part 44 Guide groove 51 1st fixing part 52 2nd fixing part 53 3rd fixing part 54 1st 4 fixing portion 30 optical pickup device 32 objective lens 42 lead screw 41 thread motor 43 engaging portion 34 connector 36 housing 37 actuator 50 motor unit 58 rotating shaft 60 centering member 62 turntable 64 rotor 66 magnet 68 driving coil 70 rotating shaft fixing member 72 Bearing

Claims

A motor unit incorporated in an optical pickup support device that drives the optical pickup device along the first guide shaft and the second guide shaft, and holds and rotates the optical recording medium;
A motor support substrate;
A spindle motor attached to the motor support substrate;
A turntable that rotates with the spindle motor and holds the optical recording medium;
A first fixing portion provided on the motor support substrate and fixed by abutting one end of the first guide shaft;
A second fixing portion provided on the motor support substrate and fixed by abutting one end of the second guide shaft;
A motor unit, wherein a rotation axis of the turntable is substantially perpendicular to a running surface of the optical pickup device determined by the first guide shaft and the second guide shaft.
2. The motor unit according to claim 1, wherein the rotating shaft is substantially perpendicular to the traveling surface in both a radial direction and a tangential direction of the optical disc.
3. The motor unit according to claim 1, wherein an angle deviation amount of the rotation shaft with respect to the traveling surface is within 0.15 degrees from vertical.
4. The motor unit according to claim 1, wherein the first fixing part and the second fixing part are provided integrally with the motor support substrate.
The motor unit according to any one of claims 1 to 4, wherein the first fixing part and the second fixing part are provided in the vicinity of the spindle motor and sandwich the spindle motor.
The motor unit according to any one of claims 1 to 5, wherein the first fixing portion has a side wall, and the first guide shaft is in contact with the side wall.
The chassis,
An optical pickup device that radiates laser light to an optical recording medium and detects the laser light reflected by the optical recording medium;
A first guide shaft and a second guide shaft fixed to the chassis and supporting the optical pickup device so as to be movable in a predetermined direction;
Driving means for driving the optical pickup device in a predetermined direction;
An optical pickup supporting device comprising: the motor unit according to any one of claims 1 to 6 fixed to the chassis.
A third fixing portion and a fourth fixing portion are provided integrally with the chassis, the other end of the first guide shaft is in contact with and fixed to the third fixing portion, and the second guide is fixed to the fourth fixing portion. 8. The optical pickup support device according to claim 7, wherein the other end of the shaft abuts and is fixed.
An optical disc apparatus comprising the optical pickup support device according to claim 7 or 8.
An adjustment method of a motor unit that is incorporated in an optical pickup support device that drives an optical pickup device along a first guide shaft and a second guide shaft, and holds and rotates an optical recording medium,
A motor support substrate to which a spindle motor is attached, a turntable that rotates together with the spindle motor and supports the optical recording medium, and the first guide shaft that is provided on the motor support substrate and is to be fixed. Preparing a motor unit having a first fixing part and a second fixing part that is provided on the motor support substrate and is to be fixed by contacting the second guide shaft;
An adjustment jig having the first position receiving portion and the second position receiving portion is placed on the motor unit, and the first position receiving portion and the second position receiving portion are respectively connected to the first position receiving portion. A step of contacting the first fixed portion and the second fixed portion;
Adjusting the rotation axis of the turntable substantially perpendicular to a reference plane determined by the first position receiving portion and the second position receiving portion;
A method for adjusting a motor unit, comprising:
11. The motor unit adjustment method according to claim 10, wherein the reference surface is a surface parallel to a traveling surface of the optical pickup device determined by the first guide shaft and the second guide shaft.
The first guide shaft and the second guide shaft each have a cylindrical shape, and the first position receiving portion and the second position receiving portion are respectively cylindrical surfaces of the first guide shaft and the second guide shaft. The method for adjusting a motor unit according to claim 10 or 11, wherein the shape corresponds to a part of the motor unit.
A method of manufacturing an optical pickup support device for driving an optical pickup device along a first guide shaft and a second guide shaft,
A motor support substrate to which a spindle motor is attached; a turntable that rotates together with the spindle motor to support the optical recording medium; a first fixing portion provided on the motor support substrate; and a motor support substrate. And a second guide shaft that is to be fixed in contact with the first fixing portion, and a second guide shaft that is to be fixed in contact with the second fixing portion. Preparing a motor unit in which the rotation axis of the turntable is adjusted to be substantially perpendicular to the traveling surface of the optical pickup device determined by:
Attaching the motor unit to the chassis;
A process of abutting and fixing one end of a first guide shaft that movably supports the optical pickup device to the first fixing portion;
A step of abutting and fixing one end of a second guide shaft that movably supports the optical pickup device to the second fixing portion;
A method for manufacturing an optical pickup supporting device, comprising:
Abutting and fixing the other end of the first guide shaft to a third fixing portion provided in the chassis;
The method of manufacturing an optical pickup supporting device according to claim 13, further comprising a step of abutting and fixing the other end of the second guide shaft to a fourth fixing portion provided in the chassis.