WO2012073932A1

WO2012073932A1 - Spindle motor, optical pickup support device, optical disk device, method for adjusting spindle motor, and method for manufacturing optical pickup support device

Info

Publication number: WO2012073932A1
Application number: PCT/JP2011/077479
Authority: WO
Inventors: 青木　武
Original assignee: 三洋電機株式会社
Priority date: 2010-12-02
Filing date: 2011-11-29
Publication date: 2012-06-07
Also published as: JP2014032710A

Abstract

[Problem] Adjustment of skew in the tangential direction has been performed so that the rotation shaft of a spindle motor is perpendicular to the running surface of an optical pickup device after a spindle motor unit and first and second guide materials, which are separate components, are mounted on a chassis; and a skew adjustment member and a cumbersome skew adjustment step have been required. [Solution] Provided are: a spindle motor in which a motor support body for holding the rotation shaft of a spindle motor is directly secured to a chassis, and a bearing internally provided to the motor support body is adjusted so that the rotation shaft is substantially perpendicular to the running surface of an optical pickup device, the running surface being determined by a first guide material and a second guide material directly secured to the chassis in the same manner; and an optical pickup support device in which the spindle motor is used.

Description

Spindle motor, optical pickup support device, optical disc apparatus, spindle motor adjustment method, and optical pickup support device manufacturing method

The present invention relates to a spindle motor, an optical pickup support device, an optical disk device, a spindle motor 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. 13 is a schematic view showing the relationship between the spindle motor unit and the guide shaft of the optical pickup support device in the conventional structure, and is 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. 13, 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 measured by using the perpendicularity of the angle α of the rotating shaft 108 of the spindle motor 102 (turntable 103) to the traveling surface R as an index. Making the surface R and the main surface 103s of the turntable 103 horizontal means that the rotation shaft 108 is substantially perpendicular to the traveling surface R (for example, the degree of verticality in a range up to 0.15 degrees from the vertical). Say. 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. 13, when the guide shaft 112 and the spindle motor unit 100 are attached to the chassis 110, the perpendicularity of the angle α between the traveling surface R of the optical pickup device and the rotation shaft 108 of the spindle motor is determined by the chassis 110. It is prescribed by.

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 is adjusted in the tangential direction and the radial direction of the main surface 103s of the turntable 103 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 a problem. First, a spindle incorporated in an optical pickup support device that drives the optical pickup device along the first guide material and the second guide material, and holds and rotates the optical recording medium. A motor, a support substrate that supports the optical pickup device, a motor support that is directly fixed to the support substrate, and a rotation that rotates the turntable that is held by the motor support and holds the optical recording medium And solving the problem by making the rotation axis substantially perpendicular to the traveling surface of the optical pickup device determined by the first guide material and the second guide material fixed to the support substrate. To do.

Second, the spindle motor, 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 an optical pickup device fixed to the support substrate, This is solved by including a first guide material and a second guide material that are supported so as to be movable in a predetermined direction.

Thirdly, the optical disk device is solved by providing the above-described optical pickup support device.

Fourth, there is provided a method of adjusting a spindle motor that is incorporated in an optical pickup support device that drives the optical pickup device along the first guide material and the second guide material, and that holds and rotates the optical recording medium. A step of preparing a support substrate of the pickup device, a step of directly fixing a motor support of the spindle motor to the support substrate, a first position receiving portion corresponding to the first guide material and the second guide material, A step of placing an adjustment jig having a second position receiving portion on the support substrate, and bringing the first position receiving portion and the second position receiving portion into contact with the support substrate, respectively. Adjusting a center line of a bearing built in the motor support substantially perpendicular to a reference plane determined by the first position receiving portion and the second position receiving portion; The rotating shaft of a motor assembly having at least a turntable and solves by anda step of holding the bearing.

Fifth, a method of manufacturing an optical pickup support device for driving the optical pickup device along the first guide material and the second guide material, the step of adjusting the spindle motor by the above method, and the first guide material And the step of incorporating the optical pickup device supported by the second guide material into the support substrate.

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

First, a spindle motor is provided in which a motor support is directly fixed to a support substrate (chassis) of an optical pickup device, and a center line of a bearing built in the motor support is perpendicular to a running surface of the optical pickup device. This eliminates the need for skew adjustment parts in the tangential direction and radial direction of the main surface of the turntable (optical disc) in the optical pickup support device using the same.

Second, fixing the motor support to the support substrate by press-fitting or bonding eliminates the need for fixing members such as the motor support substrate and screws of the spindle motor, and reduces the cost of the optical pickup support device by reducing the number of components. Realize.

Third, since the rotation axis is substantially perpendicular to the running surface in both the radial direction and the tangential direction of the optical disc, neither skew adjustment in the radial direction nor the tangential direction is required after the optical pickup support device is assembled. Therefore, it is possible to eliminate the need for skew adjustment parts.

Fourth, the adjustment of the bearing is facilitated by making the side wall of the motor support flat from the top to the bottom.

Fifth, since skew adjustment by the tangential and radial skew adjustment parts on the main surface of the turntable of the optical pickup support device is not required, it is possible to eliminate skew deviation due to elapse of time or skew deviation due to an impact test. The reliability of the pickup support device is improved.

Sixth, in the method of adjusting the spindle motor, the spindle motor support is fixed to the chassis of the optical pickup support device, and the spindle motor disposed inside the spindle motor support is defined with the traveling surface of the optical pickup device as the reference plane. By adjusting the bearing so that the center line of the bearing of the rotary shaft is perpendicular to the reference plane, the skew in the tangential direction of the main surface of the turntable in the manufacturing process of the optical pickup support device incorporating the spindle motor support body The adjustment process can be eliminated and productivity is improved.

Seventh, in the manufacturing process of the optical pickup support device, it is possible to eliminate the occurrence of a defect due to a skew adjustment error and improve the yield.

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 in which a part of (A) is extracted and disassembled. It is a perspective view for demonstrating the optical pick-up apparatus of the 1st Embodiment of this invention. 1A is a cross-sectional view illustrating a spindle motor according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view of an optical pickup device. It is a perspective view which shows the optical pick-up support apparatus of the 2nd Embodiment of this invention. It is (A) perspective view, (B) plane schematic diagram, (C) sectional drawing for demonstrating the optical pick-up apparatus of the 2nd Embodiment of this invention. It is sectional drawing explaining the (A) spindle motor unit of the 2nd Embodiment of this invention, (B) It is sectional drawing of an optical pick-up apparatus. It is sectional drawing explaining the adjustment method of the spindle motor of this invention. It is sectional drawing explaining the adjustment method of the spindle motor of this invention. It is a screen figure of the autocollimator explaining the adjustment method of the spindle motor of the present invention. It is sectional drawing explaining the adjustment method of the spindle motor of this invention. It is sectional drawing explaining the spindle motor of the other form of this invention. It is a flowchart explaining the manufacturing method of the optical pick-up support apparatus 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 schematically showing the optical pickup support device 10 placed with the objective lens 32 of the optical pickup device 30 facing upward, and FIG. 1B is a perspective view of FIG. FIG.

Referring to FIG. 1A, the optical pickup support device 10 includes a support substrate 12, an optical pickup device 30, a first guide material 14, a second guide material 16, and a spindle motor 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 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 50.

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.

A support substrate (hereinafter referred to as a 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 including the optical pickup device 30. To do. 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. The spindle motor 50 is directly fixed to the end portion (one short side of the rectangular shape) of the chassis 12.

The first guide member 14 and the second guide member 16 are guide shafts made of, for example, a cylindrical metal material such as stainless steel. The first guide member 14 and the second guide member 16 are directly fixed to the chassis 12, and the optical pickup device 30 is connected in the radial direction of the optical disc (radial direction). : Supported in a movable manner with respect to Dr direction).
Therefore, the first guide member 14 and the second guide member 16 are arranged in parallel to the radial direction of the optical disc in plan view, and are also arranged in parallel to the information recording surface of the optical disc. Here, the first guide member 14 may be referred to as a main (guide) shaft, and the second guide member 16 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 member 14 on the spindle motor 50 side comes into contact with a first fixing portion 51 provided on the chassis 12 and is fixed by a fixing member (not shown) here. The fixing member is, for example, a screw. Similarly, one end of the second guide member 16 on the spindle motor 50 side is fixed to a second fixing portion 52 provided on the chassis 12 by a fixing member. The other end of the first guide member 14 and the other end of the second guide member 16 are respectively supported by a third fixing portion 53 and a fourth fixing portion 54 provided on the chassis 12 and fixed by a fixing member. .

The first fixing portion 51, the second fixing portion 52, the third fixing portion 53, and the fourth fixing portion 54 (the first fixing portion 51 and the like) are all integrally formed of the same material as the chassis 12. For example, when the chassis 12 is made of a metal material, the first fixing portion 51 and the like are configured such that the main surface of the chassis 12 and the side surfaces of the first fixing portion 51 and the like form an L shape by pressing or the like. It is made to project in a direction perpendicular to the main surface. When the chassis 12 is made of a resin material, it is formed in the same shape by injection molding or the like.

The first fixing portion 51 and the like are provided on the short side of the inner peripheral portion of the frame-shaped (frame shape) chassis 12. The first fixing portion 51 and the second fixing portion 52 are provided so as to sandwich the spindle motor 50 on the short side to which the spindle motor 50 is fixed, and the third fixing portion 53 and the fourth fixing portion are provided on the other short side. The fixing portions 54 are provided at positions facing the first fixing portion 51 and the second fixing portion 52, respectively.

Also, the optical pickup support device 10 of the present embodiment is a component for adjusting skew in the radial direction (Dr direction) of the optical disc and the tangential direction (tangential direction: Dt direction) of the optical disc perpendicular to the radial direction (first direction). For example, screws and springs for adjusting the positions of the guide material 14 and the second guide material 16 to a small amount are not necessary.

Although not shown, the optical pickup support device 10 includes a drive unit that drives the optical pickup device 30 in the radial direction of the optical disk. The drive unit is fixed to the chassis 12 and includes, for example, a thread motor, a lead screw, and an engaging portion (rack). The lead screw is arranged in parallel with the first guide member 14 and the second guide member 16, and a guide groove is formed in a spiral shape on the outer surface of the lead screw, and one end thereof is connected to a thread motor. On the other hand, the front end portion of the engaging portion (rack) fixed to the housing 36 of the optical pickup device 30 is urged (pressed) to engage with the guide groove of the lead screw. Therefore, when the tracking signal is applied to the sled motor, the lead screw is rotated by a predetermined angle. Then, the optical pickup device 30 fixed to the engaging portion moves by a predetermined amount while being supported by the first guide material 14 and the second guide material 16.

Although not shown, a motor wiring board provided with wiring through which a current for driving the spindle motor 50 passes and a flexible wiring board connected to the wiring of the motor wiring board are arranged on the main surface of the chassis 12. Is done.

FIG. 1B is an exploded perspective view of the spindle motor 50, and the optical pickup device is omitted. The spindle motor 50 includes a motor support 75 and a motor assembly 61, and the tip of the motor support 75 is press-fitted into a press-fitting hole 121 provided in the chassis 12, whereby the rotation shaft 63 of the motor assembly 61 is moved. It is fixed to the chassis 12 so as to be rotatable about the center.

Thus, for example, as in the conventional structure (FIG. 13), the spindle motor 102 is attached to the motor support board 100 and the motor support board 100 is attached to the chassis 110, compared with the motor support board 100 and the chassis 110. A fixing member (screw or the like) for attaching to the motor becomes unnecessary, and the attachment process of the motor support substrate 100 can be omitted.

Although details of the spindle motor 50 will be described later, a turntable 62 is provided on the upper surface, and the turntable 62 holds the optical disk by a chucking mechanism or the like. Thus, the optical disk is rotated at a predetermined speed as the spindle motor 50 rotates. The turntable 62 and the rotating shaft 63 of the spindle motor 50 coincide with each other and become the rotating shaft of the optical disk.

Referring to FIG. 2, the optical pickup device 30 is provided at the left and right ends of the 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 the housing 36. Guide holes 38 and guide grooves 39 are provided. 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 member 14 and the second guide member 16 so as to be movable in the radial direction (Dr direction) of the optical disc.

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

The guide groove 39 is provided at an end portion of the housing 36 facing the guide hole 38 and has a U-shape or a U-shape that opens toward the outside. The second guide member 16 is engaged or inserted into the guide groove 39.

The configuration of the spindle motor 50 incorporated in the optical pickup support device 10 will be described with reference to FIG. FIG. 3A is a cross-sectional view showing a state in which the spindle motor 50 is attached to the chassis 12, and is a cross-section corresponding to the aa line in FIG. 3B is a cross-sectional view of the optical pickup device 30 for explaining the traveling surface R, and is a cross-section corresponding to the line bb in FIG. 1A.

3A, the spindle motor 50 includes a motor assembly 61 and a motor support body 75 that rotatably supports the motor assembly 61. The motor support 75 has a cylindrical shape (see FIG. 1B) and has a bearing 72 built therein. The front end (bottom) of the motor support 75 is press-fitted into a press-fitting hole 121 provided in the chassis 12, and a plurality of drive coils 68 are fixed to the outer peripheral portion. That is, the motor support 75 is directly supported and fixed to the chassis 12 without using a motor support substrate or the like and without using a fixing member such as a screw. As a result, parts such as a motor support substrate and a fixing member (such as a screw) for fixing the motor support substrate to the chassis 12 can be omitted, and the cost can be reduced.

The motor assembly 61 has a rotating shaft 63, a rotor 64, a magnet 66, a turntable 62, and a centering member 60, and the rotating shaft 63 is supported by a bearing 72 of a motor support 75.

The rotor 64 is fitted and fixed to the rotating shaft 63 and rotates integrally with the rotating shaft 63. 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 motor assembly 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 50 having such a configuration, when a drive signal is supplied to the drive coil 68 from a motor drive circuit attached to the chassis 12 or the like, the magnetic force induced from the drive coil 68 and the magnetic force generated from the magnet 66 are reduced. Thus, a rotational force for the rotor 64 is generated. As a result, the rotor 64 rotates about the rotation shaft 63.

When the rotation shaft 63 is rotated by the rotational driving force generated in the rotor 64, the turntable 62 fitted and fixed to the rotation shaft 63 is rotated, 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.

The first fixing portion 51 and the second fixing portion 52 are portions where the end portion of the chassis 12 made of, for example, a metal material is bent at a right angle in the focusing direction (Df direction), that is, provided integrally with the chassis 12. The first fixing part 51 and the second fixing part 52 are provided in the vicinity of the spindle motor 50 at a position sandwiching them. The side surfaces of the first fixing portion 51 and the second fixing portion 52 are in contact with the first guide material 14 and the second guide material 16, respectively. For example, the first guide member 14 is fixed to the first fixing portion 51 by a fixing member 13 such as a screw, and the second guide member 16 is fixed to the second fixing portion 52 by the fixing member 13.

More specifically, the first guide member 14 has a circular cylindrical shape in this cross section, and an L-shaped portion in which a part of the cylindrical surface is formed by the side surface of the first fixed portion 51 and the main surface of the chassis 12. It is arrange | positioned so that it may contact, and it fixes so that it may be hold | suppressed with the side and head of the screw which is the fixing member 13. FIG. Similarly, the second guide member 16 has a circular cylindrical shape in cross section, and a part of the cylindrical surface is in contact with an L-shaped part formed by the side surface of the second fixing portion 52 and the main surface of the chassis 12. It arrange | positions in this way and it fixes so that it may be hold | suppressed with the side surface and head of the screw which is the fixing member 13. FIG. The third fixing portion 53 and the fourth fixing portion 54 (see FIG. 1) on the other end side of the first guide material 14 and the second guide material 16 have the same configuration.

The spindle motor 50 is a running surface of the optical pickup device determined by the first guide member 14 fixed to the first fixing portion 51 of the chassis 12 and the second guide member 16 fixed to the second fixing portion 52. The rotation shaft 63 of the motor assembly 61 (turn table 62) is substantially perpendicular to R (dashed line). Specifically, a surface including three points on the chassis 12 that is parallel (horizontal) to the traveling surface R of the optical pickup device 30 is a reference surface (hereinafter referred to as an axial suspension) at the time of adjustment for securing the axial suspension. The angle of the bearing 72 built in the motor support 75 is adjusted so that the axis of the rotary shaft 63 is secured as the reference plane S). The adjustment method will be described later.

Here, the term “substantially perpendicular” refers to a state in which the rotation shaft 63 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.

That is, the spindle motor 50 of this embodiment does not secure the shaft of the rotating material 108 with respect to the main surface 101s of the motor support substrate 101 to which the spindle motor is attached as shown in FIG. In the state of being directly fixed to 12, the traveling surface R of the optical pickup device 30 determined by the first guide material 14 and the second guide material 16 that are similarly directly fixed to the chassis 12 (parallel to the traveling surface R). The bearing 72 is adjusted so that the vertical axis of the rotary shaft 63 is secured. As a result, only by attaching the motor assembly 61 to the motor support 75, the running surface R of the optical pickup device 30 can be adjusted without adjusting any skew in the tangential direction (Dt direction) and the radial direction (Dr direction). It can be made horizontal to the main surface 62s of the turntable 62, that is, to be horizontal to the information recording surface of the optical disk.

In this embodiment, the positional relationship (horizontal distance) between the first guide member 14 and the rotary shaft 63 to be fixed to the first fixing portion 51 is also accurately positioned. That is, the normal distance L from the rotating shaft 63 to the first guide material 14 can be accurately ensured by bringing the first guide material 14 into contact with and fixed to the side surface of the first fixing portion 51.

Referring to FIG. 3 (B) and FIG. 1 (A), the traveling surface R will be further described. FIG. 3B is a cross-sectional view of the optical pickup device 30 supported by the first guide material 14 and the second guide material 16.

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

Here, the inner reference point 14i of the first guide member 14 is directly below one end 38i of the guide hole 38 on the spindle motor 50 side when the optical pickup device 30 is closest to the spindle motor 50 in FIG. The center point of the cylinder of the 1st guide material 14 located in this. Further, the outer reference point 14o of the first guide member 14 is one end 38o on the side away from the spindle motor 50 of the guide hole 38 when the optical pickup device 30 is closest to the spindle motor 50 in FIG. The center point of the cylinder of the 1st guide material 14 located right below. Further, the inner reference point 16i of the second guide member 16 is located, for example, immediately below the center point 39c of the guide groove 39 when the optical pickup device 30 is closest to the spindle motor 50 in FIG. 2 Refers to the center point of the cylinder of the guide material 16.

Since the first guide member 14 and the second guide member 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 member 14 and the second guide member 16i. It can be said that it is at a position moved in the extending direction of the material 16. That is, with reference to FIG. 1A and FIG. 3B, the inner reference point 14i of the first guide member 14 is the center point of the first guide member 14 closest to the first fixing portion 51, and is outside. The reference point 14o can be said to be the center point of the first guide member 14 that is closest to the third fixing portion 53. Further, the inner reference point 16 i of the second guide material 16 can be said to be the center point of the second guide material 16 immediately adjacent to the second fixing portion 52. That is, a uniquely determined plane including the respective center points (

inner reference points

14i and 16i and outer reference point 14o) at the position where the chassis 12, the first guide member 14 and the second guide member 16 abuts. It becomes surface R.

And in this embodiment, the 1st guide material 14 and the 2nd guide material 16 contact | abut with the 1st fixing | fixed part 51, the 2nd fixing | fixed part 52, and the 3rd fixing | fixed part 53. FIG. That is, three points (S1) on the main surface of the chassis 12 in contact with the first guide member 14 and the second guide member 16 in the immediate vicinity of the first fixing portion 51, the second fixing portion 52, and the third fixing portion 53, respectively. , S2 and S3) are uniquely determined planes that are parallel (horizontal) to the running plane R, and are referred to as the vertical reference plane S.

Further, by securing the vertical axis of the rotary shaft 63 with respect to the vertical axis reference surface S, the rotary shaft 63 can be made substantially perpendicular to the traveling surface R of the optical pickup device 30.

Conventionally, as shown in FIG. 13, a spindle motor unit 100 in which the rotating member 108 is secured to the main surface 101s of the motor support substrate 101 is fixed to a chassis in which a first guide member 112a and a second guide member 112b are fixed. 110 was attached. That is, in the spindle motor unit 100, the axis of the rotating member 108 is adjusted with the main surface 101s of the motor support substrate 101 as the axis reference plane S as a single component. However, since the traveling surface R of the optical pickup device formed by the first guide material 112 a and the second guide material 112 b is determined by the chassis 110 that is separate from the spindle motor unit 100, it rotates as the spindle motor unit 100. Even when the shaft 108 of the material 108 was secured, the shaft suspension was not guaranteed for the running surface R of the optical pickup device. For this reason, after the spindle motor unit 100 is attached to the chassis 110, a tangential and radial skew adjustment step by skew adjustment means (components) is required.

On the other hand, the motor support body 75 of the present embodiment has a built-in bearing 72 so that the axis of the rotary shaft 63 is secured with the axis parallel to the running surface R of the optical pickup device 30 as the axis reference plane S. Has been adjusted. Therefore, only by attaching the motor assembly 61 to the motor support 75, 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.

Further, as shown in FIG. 1, the axial reference surface S includes contact points (S1, S3) between the both ends of the first guide member 14 extending in the radial direction (Dr direction) and the main surface of the chassis 12. That is, the vertical axis of the rotating shaft 63 is secured in the traveling direction of the optical pickup device 30 (the radial direction of the main surface 62s of the turntable 62. Accordingly, not only the tangential direction (Dt direction) but also the diameter. Since the skew deviation amount in the direction can be minimized without adjusting, the skew adjusting component for the radial direction of the main surface 62s of the turntable 62 becomes unnecessary.

Here, referring to FIG. 1 (A), the traveling surface R of the optical pickup device 30 has the inner reference point 14i, the outer reference point 14o of the first guide member 14 and the inner side of the second guide member 16 as described above. It is uniquely determined on a plane including the three reference points 16i. That is, the outer reference point (the center point of the second guide member 16 closest to the fourth fixing portion 54) 16o of the second guide member 16 is deviated from the running surface R, and the accuracy (± 0) of the chassis 12 is increased. .05 mm) may cause a skew deviation in the tangential direction (Dt direction).

However, the amount of skew deviation at the outer reference point 16o of the second guide member 16 is 0.058 degrees (tan-1 (0.05 / 49)) by rough calculation, and the adjusted rotating shaft 63 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 when the outer reference point 16o of the second guide member 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.

・ BR> @ The shape of the first fixing portion 51 and the second fixing portion 52 is not limited to the rectangular shape shown in FIG. 2, but is a groove (U-shaped) shape that opens in the focusing direction, or a tangential direction (Dt direction). A groove (C-shaped) opened in the shape may be used. A shape having at least a portion with which the first guide member 14 abuts in the tangential direction, such as a U-shape or a C-shape, is desirable because the normal distance L can be accurately ensured as described above.

Next, a second embodiment of the present invention will be described with reference to FIGS.

The second embodiment is an optical pickup support device 10 in which a part of the chassis 12 is a second guide member 16.

That is, with reference to FIG. 4, the optical pickup supporting device 10 includes a cylindrical first guide in a first fixing portion 51 and a third fixing portion 53 provided in the vicinity of one long side of the rectangular chassis 12. A material (guide shaft) 14 is fixed to the chassis 12. Then, the inner peripheral end of the chassis 12 on the other long side facing the one long side becomes the second guide member 16, and the optical pickup device 30 is moved in the Dr direction by the first guide member 14 and the second guide member 16. Support in a movable manner.

Since the cylindrical guide shaft is not used for the second guide material 16, the second fixing portion and the fourth fixing portion for fixing it are also unnecessary. Since other than this is the same as the first embodiment, the description thereof is omitted.

Further, the optical pickup device 30 of the second embodiment will be described with reference to FIG. 5A is a perspective view, FIG. 5B is a schematic plan view, and FIG. 5C is a side view.

In the optical pickup device 30, a guide groove 39 of the housing 36 that engages with the second guide member 16 is different from the shape of the first embodiment.

Referring to FIG. 5A, the guide groove 39 includes, for example, one upper support portion 391 and two lower support portions 392. For example, the upper support portion 391 is disposed between the two lower support portions 392 in a plan view of FIG. Referring to FIG. 5C, the main surface of the housing 36 on the objective lens 32 side extends on the same plane, and the lower support portion 392 extends on the same plane as the main surface on the back surface side. Further, the upper support portion 391 is provided with a protruding portion 391a. The upper support portion 391 and the lower support portion 392 sandwich the two main surfaces of the chassis 12 serving as the second guide member 16, and the protrusions 391 a and the main surfaces of the lower support portion 392 come into contact with and engage with the chassis 12. .

Other configurations are the same as those in the first embodiment, and a description thereof will be omitted.

The traveling surface R of the second embodiment will be described with reference to FIG. FIG. 6A is a cross-sectional view when the spindle motor 50 and the first guide member 14 are attached to the chassis 12, and corresponds to a cross section taken along the line cc of FIG. 6B is a cross-sectional view of the optical pickup device 30 and corresponds to a cross section taken along line dd in FIG.

The traveling surface R of the optical pickup device 30 is the same as that of the first embodiment, and includes three points: an outer reference point 14o and an inner reference point 14i of the first guide material 14, and an inner reference point 16i of the second guide material 16. A surface that is uniquely determined including

In the second embodiment, the inner reference point 16i of the second guide member 16 is, for example, directly below the center point 39c of the guide groove 39 when the optical pickup device 30 is closest to the spindle motor 50 in FIG. The center point (thickness) of the second guide material 16 that is located (or abuts against the protruding portion 391a). At this time, the center point 39c (or the protrusion 391a) is close to the end of the second guide member 16 on the spindle motor 50 side, in other words, at the end of the second guide member 16 on the spindle motor 50 side, The center point (thickness) of the second guide material 16 can be said to be the inner reference point 16 i of the second guide material 16.

The inner reference point 16i has three points when the height differs from the outer reference point 14o and the inner reference point 14i of the first guide member 14 in the focusing direction (Df direction) as shown in FIG. 6B. One (for example, the inner reference point 16i) is shifted in the Df direction so that the heights coincide with each other. A surface uniquely determined including the three points of the outer reference point 14o and the inner reference point 14i of the first guide member 14 and the inner reference point 16i of the second guide member 16 is defined as a running surface R.

Referring again to FIG. 4, in the second embodiment, the first guide member 14 contacts the first fixing portion 51 and the third fixing portion 53. Then, the protruding portion 391 a of the guide groove 39 of the optical pickup device 30 contacts the second guide member 16 that is a part of the chassis 12. That is, two points (S1, S3) on the main surface of the chassis 12 that are in contact with the first guide member 14 and a point that is in contact with the protrusion 391a (in the immediate vicinity of each of the first fixing part 51 and the third fixing part 53) The surface uniquely determined including S2) is a surface parallel (horizontal) to the traveling surface R, and this is defined as the vertical reference surface S.

Further, by securing the vertical axis of the rotary shaft 63 with respect to the vertical axis reference surface S, the rotary shaft 63 can be made substantially perpendicular to the traveling surface R of the optical pickup device 30. As a result, the skew deviation amount in the tangential direction (Dt direction) and the radial direction (Dr direction) of the main surface 62s of the turntable 62 can be minimized without adjusting, and thus a skew adjusting component is not necessary.

Note that the skew deviation that may occur at the outer reference point (the end point of the second guide member 16 that is farthest from the spindle motor 50) 16o of the second guide member 16 is the same as that of the first embodiment, and is a problem. There is no.

Next, with reference to FIGS. 7 to 10, an adjustment method of the bearing 72 of the motor support 75 will be described taking the case of the first embodiment as an example. FIG. 7 is a cross-sectional view showing a state before and after attaching the motor support 75 to the chassis 12, and FIG. 8 is a cross-sectional view showing a part of the adjustment jig 150 of the bearing 72 and the motor support 75. FIG. 9 is a schematic view showing the screen of the autocollimator before and after adjustment, and FIG. 10 is a cross-sectional view after adjustment.

First, referring to FIG. 7A, a chassis 12 provided with a press-fitting hole 121 is prepared. The press-fitting allowance is, for example, about 0.01 mm to 0.03 mm when the chassis 12 is a metal material, and about 0.04 mm to 0.07 mm when the chassis 12 is a resin material.

7B to 7D are enlarged views of the vicinity of the press-fitting hole 121. FIG.

7B, the press-fitting hole 121 can be formed by pressing or the like if the chassis 12 is a metal material, for example. At that time, the shape of the opening of the press-fitting hole 121 is different on both main surfaces of the chassis 12. That is, for example, there is a burr that curves from the main surface side of the chassis 12 with a certain curvature along the side wall of the press-fitting hole 121 on the one main surface SF1 side and protrudes from the main surface of the chassis 12 on the other main surface SF2 side. Arise. In such a case, the motor support 75 is press-fitted as indicated by an arrow from the one main surface SF1 side whose opening is curved and whose diameter is wider than the other part of the press-fitting hole 121. Since the opening is wide and the curved shape serves as a guide, the motor support can be press-fitted smoothly. Moreover, by press-fitting from the side where the opening is wide, press-fitting can be performed with high accuracy without being disturbed by burrs.

Further, as shown in FIG. 7C, the press-fitting hole 121 may be formed while processing so that only the opening on the one principal surface SF1 side is widened. In this case, pressing may be performed using a mold in which only the opening on the one main surface SF1 side is widened, or when the chassis 12 is a resin material, injection molding may be performed using such a mold. Good. Also in this case, as shown by the arrow, the motor support 75 is press-fitted from the one principal surface SF1 side whose diameter is increased.

Further, as shown in FIG. 7D, the opening may be wide, and a guide that facilitates press-fitting such as a step or a slope may be formed inside (side wall of the press-fitting hole 121). Also in this case, as shown by an arrow, press-fitting is facilitated by press-fitting the motor support 75 from the one main surface SF1 side whose diameter has increased.

In this way, the bottom of the motor support 75 is press-fitted into the press-fitting hole 121 as shown in FIG. In this state, the bearing 72 built in the motor support 75 is adjusted so that the center line 72c is substantially perpendicular to the axial reference plane S. The center line 72c of the bearing 72 coincides with the center line of the rotating shaft of a motor assembly (not shown) to be attached later.

Although FIG. 7 shows a case where the motor support 75 is press-fitted into the press-fitting hole 121, the motor support 75 may be fixed to the chassis 12 by adhesion.

In that case, the press-fitting hole 121 is not provided in the chassis 12. A recess in which the bottom portion of the motor support 75 is fitted and supported may be provided in a part of the chassis 12 (portion of the press-fitting hole 121), and may be fixed to the motor support 75 with an adhesive. Alternatively, a fitting hole that is larger than the press-fitting hole 121 and matches the shape of the bottom of the motor support 75 may be provided, and after the motor support 75 is inserted, the periphery may be fixed with an adhesive.

Referring to FIG. 8, the adjustment jig 150 includes a reference surface S ′ of the jig, and a first position receiving portion 151 and a second position receiving portion 152 provided along the reference surface S ′. The first position receiving portion 151 includes a first contact portion 151 c having a shape corresponding to a part of the first guide member 14 at a position corresponding to the first fixing portion 51 of the chassis 12. Specifically, the first contact portion 151c has a shape that coincides with a part of the cylindrical surface of the cylindrical first guide member 14, and is at least a cylinder having the same diameter as the column of the first guide member 14. For example, a part is cut out so as to have a semicircular shape in the cross section of FIG. The first contact portion 151c has a semi-cylindrical shape that extends in the Dr direction to a position corresponding to the third fixing portion 53 of the chassis 12, for example, similarly to the first guide member 14. Further, the third contact portion 153 c may be provided at a position corresponding to the third fixing portion 53 with the same shape as the first contact portion 151 c and spaced apart from the first contact portion 151 c.

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

The distance h from the tip of the first contact portion 151c (third contact portion 153c) and the tip of the second contact portion 152c to the reference surface S 'of the jig is equal.

The adjustment method is as follows.

First, the adjustment jig 150 is placed on the chassis 12 into which the motor support 75 is press-fitted, and the first contact portion 151c (third contact portion 153c) of the first position receiving portion 151, and the second The second contact portion 152 c of the positioning receiving portion 152 is brought into contact with the respective side surfaces of the first fixing portion 51, the third fixing portion 53, and the second fixing portion 52 and the main surface of the chassis 12. That is, the first contact portion 151c (third contact portion 153c) and the second contact portion 152c are in contact with the three points S1, S2, and S3 on the chassis 12. These three points S1, S2, and S3 are points included in the axial reference plane S.

As described above, the distance h in the vertical direction (Df direction) from the tip of the first contact portion 151c (third contact portion 153c) and the tip of the second contact portion 152c to the reference plane S ′ of the jig. Are all equal. Therefore, the surface uniquely determined by the points S1, S2, and S3 on the chassis 12 with which they abut (the axial reference surface S) and the reference surface S 'of the jig are arranged in parallel (horizontal). Since the first contact portion 151c and the second contact portion 152c have shapes corresponding to the first guide material 14 and the second guide material 16, they are determined by the first guide material 14 and the second guide material 16. The traveling surface R of the optical pickup device 30 is also a surface parallel to the axial reference surface S and the reference surface S ′ of the jig.

In this state, adjustment is performed so that the center line 72c of the bearing 72 built in the motor support 75 is substantially perpendicular to the reference plane S 'of the adjustment jig 150. That is, a reflection jig 155 having a reflection surface 155r and a shaft portion 155s that reflects light from above is attached to the motor support 75. The shaft portion 155 s has a cylindrical shape with the same diameter as the rotation shaft of the motor assembly, and is held by the bearing 72. A laser beam is projected from above the origin O of the adjustment jig 150 as indicated by an arrow. The degree of perpendicularity of the center line 72c of the bearing 72 is adjusted while detecting how much the laser beam reflected by the reflecting surface 155r of the reflecting jig 155 deviates from the origin O by the autocollimator device.

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. Since the axial reference plane S also includes two points in the extending direction (Dr direction) of the first guide member 14, the skew after the assembly of the optical pickup support device is adjusted by adjusting the radial direction and the tangential direction here. Adjustment is not required in both the radial and tangential directions.

The state before and after adjustment will be described with reference to FIG. FIG. 9A shows a screen of the autocollimator device before adjustment, and FIG. 9B is a schematic diagram showing a screen of the autocollimator device 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. 9A, before adjustment, when a locus T (substantially circular) of reflected light from the reflecting jig 155 is recognized at the position (X1, Y1), the center line of the bearing 72 ( 72c) is shifted from the origin O in the radial direction and the tangential direction by an angle of 0.15 degrees or more.

Therefore, the bearing 72 is adjusted as shown in FIG. 9B 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).

Thereby, the center line 72c of the bearing 72 can be adjusted substantially perpendicularly to the axial reference plane S of the chassis 12.

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 material 14 and the second guide material 16, that is, a shape corresponding to a part of them. During adjustment, first, the first contact portion 151c (third contact portion 153c) and the second contact portion 152c are respectively connected to the first fixing portion 51, the third fixing portion 53, the second fixing portion 52, and the chassis 12. By making at least point contact with the main surface 12s, the axial reference plane S of the chassis 12 is arranged in parallel (horizontal) with the reference plane S ′ of the jig.

Thereby, for example, even when processing variations occur in the chassis 12 including the first fixing portion 51, the second fixing portion 52, and the third fixing portion 53, the first contact portion 151c (third The plane including the three points (S1, S2, S3) of the main surface of the chassis 12 that contacts the contact portion 153c) and the second contact portion 152c is uniquely determined.

That is, even if there is variation between the chassis 12, the state of the chassis 12 with respect to the reference plane S ′ of the adjustment jig 150 is reproduced while reproducing the state where the first guide material 14 and the second guide material 16 are fixed individually. The axial reference plane S can be arranged horizontally. Then, by adjusting the center line 72c of the bearing 72 to be substantially perpendicular to the axial reference plane S, the traveling surface R determined by the first guide material 14 and the second guide material 16 is changed to the axial reference plane. Can be parallel (horizontal) to S.

If the main surface of the chassis 12 adjacent to the first fixing portion 51, the second fixing portion 52, and the third fixing portion 53 is a smooth surface, the protruding first contact portion 51c (third contact portion 53c). The flat first position receiving portion 151 and the second position receiving portion 152 are brought into contact with the first fixing portion 51, the third fixing portion 53, and the second fixing portion 52 without providing the second contact portion 52c. May be. In this case, for example, the contact surface between the first fixed portion 51 and the third fixed portion 53 of the first position receiving portion 151 or the contact surface with the second fixed portion 52 of the second position receiving portion 152. Becomes the axial reference plane S.

Further, referring to FIG. 10A, after adjusting the bearing 72, the motor assembly 61 is attached in place of the reflecting jig 155. That is, the motor assembly 61 is inserted into the motor support 75, and the rotating shaft 63 is held by the bearing 72.

As shown in FIG. 10B, the center line 72c of the bearing 72 is adjusted to be substantially perpendicular to the axial reference plane S. Therefore, the vertical axis of the rotary shaft 63 can be secured with respect to the vertical axis reference plane S only by attaching the motor assembly 61. That is, the spindle motor 50 in which the rotation shaft 63 of the turntable 62 is substantially perpendicular to the traveling surface R of the optical pickup device 30 can be obtained.

The adjustment method in the second embodiment is that a part of the optical pickup device 30 in which the second contact portion 52c of the second position receiving portion 152 is engaged (contacted) with the second guide member 16 is used. And the corresponding shape. Specifically, the adjustment can be performed in the same manner as described above by using the adjustment jig 150 such that the shape of the second contact portion 52 c matches the protrusion 391 a of the guide groove 39 of the optical pickup device 30.

FIG. 11 is a cross-sectional view showing another embodiment of the spindle motor 50.

The side wall 75s of the motor support 75 of the spindle motor 50 may have a flat shape with no step from the top to the bottom. In the case of FIG. 3 (A), the side wall of the motor support 75 protrudes in the vicinity of the opening of the press-fitting hole 121, and there is a risk of being affected by a step or the like when the bearing 72 is adjusted. is there.

Therefore, in the structure shown in FIG. 11, the diameter of the outer peripheral surface is made equal from the top to the bottom of the motor support 75. Alternatively, the motor support 75 may have a taper shape in which the diameter of the outer peripheral surface gradually decreases slightly from the top to the bottom. That is, in the motor support 75, the side wall 75s is a flat surface where no step is provided above and below the press-fitting hole 121 (on both main surfaces of the chassis 12). Thereby, adjustment of the bearing 72 can be performed more smoothly and easily. Here, as in the first embodiment, the first guide member 14 and the second guide member 16 are both guide shafts as an example, but the second guide is the same as in the second embodiment. Even if the material 16 is a spindle motor which is a part of the chassis 12, it can be implemented in the same manner, and the same effect can be obtained.

Then, the spindle motor 50 adjusted in this way is used to manufacture an optical pickup support device. Hereinafter, the manufacturing method of the optical pickup supporting device will be described with reference to the flowchart of FIG. 12 and the above-described drawings as necessary, taking the case of the first embodiment as an example.

Step S1: The chassis 12 provided with the press-fitting hole 121 is prepared (FIG. 7A), and the motor support 75 is press-fitted into the press-fitting hole 121 (FIG. 7E).

Step S2: Adjustment is performed so that the center line 72c of the bearing 72 built in the motor support 75 is substantially perpendicular to the axial reference plane S of the chassis 12 (FIGS. 8 and 9).

Step S3: The motor assembly 61 is attached to the motor support 75, and the rotating shaft 63 is held by the bearing 72 (FIG. 10).

Step S4: After the first guide member 14 is inserted into the guide hole 38 of the optical pickup device 30, the end portions of the first guide member 14 are brought into contact with the first fixing portion 51 and the third fixing portion 53, respectively, and the fixing member 13 is contacted. (For example, screws) The first guide member 14 abuts against the side surface of the first fixing portion 51, and thereby the normal distance L from the rotation shaft 63 of the spindle motor 50 is accurately regulated (FIG. 1A, FIG. A)).

Next, after engaging the second guide member 16 with the guide groove 39 of the optical pickup device 30, the end portions of the second guide member 16 are brought into contact with the second fixing portion 52 and the fourth fixing portion 54, respectively. It fixes with the fixing member 13 (FIG. 1 (A), FIG. 3 (A)).

Thereafter, a drive unit (not shown) for moving the optical pickup device 30 along the first guide material 14 and the second guide material 16 is attached. Thereby, the optical pick-up support apparatus 10 shown in FIG. 1 is obtained.

As described above, in this embodiment, when the motor support 75 is press-fitted into the chassis 12, the first guide member 14 and the second guide member 14 that are fixed to the first fixing portion 51, the second fixing portion 52, and the third fixing portion 53. The rotation shaft 63 of the turntable 62 is substantially perpendicular to the traveling surface R of the optical pickup device 30 formed by the guide material 16 (based on the axis reference surface S parallel to the traveling surface R). The bearing 72 is adjusted by an adjusting jig 150 having the same shape as part of the first guide material 14 and the second guide material 16.

Therefore, with the motor assembly 61 attached to the motor support 75, the rotation shaft 63 of the turntable 62 is secured to the running surface R of the optical pickup device 30, and the turntable after the attachment is secured. The skew adjustment process in the tangential direction and the radial direction of 62 becomes unnecessary.

In the case of the second embodiment, the second guide member 16 is engaged with the guide groove 39 of the optical pickup device 30 to obtain the final structure shown in FIG. 4, and the end portions of the second guide member 16 are fixed. The process to perform can be omitted.

In addition, even if the fixing member 13 of the 1st guide material 14 and the 2nd guide material 16 is a spring etc., it can implement similarly.

Thus, the present invention does not use the motor support substrate of the spindle motor as the shaft reference plane when adjusting the shaft suspension, but the optical pickup device determined by the first guide material 14 and the second guide material 16. A plane including three points (S 1, S 2, S 3) on the main surface of the chassis 12 that is parallel (horizontal) with the traveling surface R of the shaft 30 is defined as an axial reference plane S, and a spindle motor 50 (turntable) is provided for this plane. 62) the spindle motor 50 in which the perpendicularity of the rotary shaft 63 is adjusted (the vertical axis of the rotary shaft 63 is secured with respect to the traveling surface R of the optical pickup device 30), and the optical pickup support device 10 using the same. And an optical disk apparatus using the same.

Further, the motor support 75 of the spindle motor 50 is directly fixed to the chassis 12, and subsequently, the verticality of the bearing 72 that holds the rotating shaft 63 is adjusted. At this time, the first guide member 14 and The bearing 72 is adjusted (the running surface R of the optical pickup device 30) by using an adjusting jig whose reference plane is a plane parallel (horizontal) to the running surface R of the optical pickup device 30 determined by the second guide material 16. A method for adjusting the spindle motor 50 and a method for manufacturing the optical pickup support device 10 using the same are provided.

Specifically, the motor support 75 is press-fitted or bonded directly to the chassis 12. A first position receiving jig 151 and a second receiving jig 152 corresponding to the shapes of the first guide material 14 and the second guide material 16 are provided, and a surface parallel to the running surface R of the optical pickup device 30 is provided. The first fixing portion 51 of the chassis 12 for the first guide member 14 and the second guide member 16 is used for the first and second

positioning receiving jigs

151 and 152, respectively, using the adjustment jig 150 as a reference surface. The bearing 72 is brought into contact with the second fixing portion 52 and the third fixing portion 53 so that the center line 72c of the bearing 72 inside the motor support 75 is substantially perpendicular to the axial reference surface S (running surface R). To be adjusted. Thereby, after the assembly of the optical pickup support device 10, the skew adjustment process can be eliminated in both the tangential direction and the radial direction of the turntable 62, and the skew adjustment component can be eliminated.

DESCRIPTION OF SYMBOLS 10 Optical pick-up support apparatus 12 Chassis 13 Fixing member 14 1st guide material 16 2nd guide material 38 Guide hole 39 Guide groove 51 1st fixing | fixed part 52 2nd fixing | fixed part 53 3rd fixing | fixed part 30 Optical pick-up apparatus 32 Objective lens 34 Connector 36 Housing 37 Actuator 50 Spindle motor 63 Rotating shaft 60 Centering member 62 Turntable 64 Rotor 61 Motor assembly 66 Magnet 68 Drive coil 75 Motor support 72 Bearing

Claims

A spindle motor incorporated in an optical pickup support device that drives the optical pickup device along the first guide material and the second guide material, and holds and rotates the optical recording medium,
A support substrate for supporting the optical pickup device;
A motor support directly fixed to the support substrate;
A rotating shaft for rotating a turntable held by the motor support and holding the optical recording medium,
A spindle motor characterized in that the rotation axis is substantially perpendicular to a running surface of the optical pickup device determined by the first guide material and the second guide material fixed to the support substrate.
The spindle motor according to claim 1, wherein the motor support is press-fitted and fixed to the support substrate.
3. The spindle motor according to claim 1, wherein the rotation shaft is substantially perpendicular to the traveling surface in both a radial direction and a tangential direction of the optical disc.
4. The spindle motor according to claim 1, wherein an amount of angular deviation of the rotation shaft with respect to the traveling surface is within 0.15 degrees from vertical. 5.
The spindle motor according to claim 1, wherein the second guide member is a part of the support substrate.
6. The spindle motor according to claim 1, wherein the side wall of the motor support is flat from the top to the bottom.
A spindle motor according to any one of claims 1 to 5,
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 material and a second guide material fixed to the support substrate and supporting the optical pickup device so as to be movable in a predetermined direction;
An optical pickup supporting device comprising:
An optical disc apparatus comprising the optical pickup support device according to claim 7.
A method for adjusting a spindle motor, which is incorporated in an optical pickup support device that drives an optical pickup device along a first guide material and a second guide material, and holds and rotates an optical recording medium,
Preparing a support substrate for the optical pickup device;
Directly fixing the motor support of the spindle motor to the support substrate;
An adjustment jig having a first position receiving portion and a second position receiving portion corresponding to the first guide material and the second guide material is placed on the support substrate, and the first position receiving portion is provided. A step of abutting the support portion and the second positioning receiving portion with the support substrate,
Adjusting a center line of a bearing built in the motor support substantially perpendicular to a reference plane determined by the first position receiving portion and the second position receiving portion;
And a step of holding the rotating shaft of the motor assembly having at least a rotating shaft and a turntable on the bearing.
The method according to claim 9, wherein the motor support is fixed to the support substrate by press-fitting or bonding.
10. The reference plane according to claim 9, wherein the reference plane is a plane parallel to a traveling plane of the optical pickup device determined by the first guide member and the second guide member fixed to the support substrate. Item 11. A method for adjusting a spindle motor according to Item 10.
The first guide material and the second guide material 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 material and the second guide material. The spindle motor adjustment method according to claim 9, wherein the spindle motor has a shape corresponding to a part of the spindle motor.
The first guide member has a cylindrical shape, and the first positioning receiving portion has a shape corresponding to the first guide member and a part of a previous cylindrical surface,
The second guide member is a part of the support substrate, and the second positioning receiving portion has a shape corresponding to a part of the optical pickup support device in contact with the second guide member. The method for adjusting a spindle motor according to claim 9.
A method of manufacturing an optical pickup support device for driving an optical pickup device along a first guide material and a second guide material,
Adjusting the spindle motor by the method of claims 9-13;
Incorporating the optical pickup device supported by the first guide material and the second guide material into the support substrate;
A method for manufacturing an optical pickup supporting device, comprising: