JPH11297009A - Disk drive device - Google Patents

Abstract

(57) [Problem] To reduce the number of assembling steps of a guide shaft for supporting a pickup for reading or writing a signal of a recording medium disk in a radial direction of the recording medium disk,
The present invention relates to a technique for reducing manufacturing costs. SOLUTION: An optical pickup 16 is mounted on a CD-ROM 9.
One end (inner peripheral end) 17b of the guide shaft 17 for guiding in the radius (R) direction of the (recording medium disk) is sandwiched and fixed between the chassis 13 and the stator substrate 22 of the spindle motor 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a novel disk drive device. More specifically, the present invention relates to a technique for reducing the number of assembling steps of a guide shaft that supports a pickup for reading or writing a signal of a recording medium disk in a radial direction of the recording medium disk so as to reduce the manufacturing cost.

[0002]

2. Description of the Related Art In a disk drive device for writing information on a recording medium disk or reading information recorded on the recording medium disk, information is read or written by a pickup moving in a radial direction of the recording medium disk. However, in order to accurately write or read information on the recording medium disk, it is necessary to move the objective lens of the pickup accurately in a direction coinciding with the radial direction of the recording medium disk.

Therefore, in a disk drive device, the pickup is guided by two guide shafts, and one end of one of the guide shafts (the inner peripheral end of the recording medium disk).
At a predetermined position with respect to a predetermined reference point. The predetermined reference point is usually the rotation center of the recording medium disk, that is, the spindle axis in the disk drive device.

The guide shaft whose one end is accurately positioned is used as a reference guide shaft, and serves as a reference for accurately moving the pickup in a predetermined direction.

In order to precisely regulate the position of one end of the reference guide shaft (the inner peripheral end of the recording medium disk),
The displacement (tangential displacement) of the movement locus of the pickup objective lens with respect to the radial direction of the disc is
This is because the positioning accuracy of the inner peripheral end of the reference guide shaft is greatly affected.

[0006] The inner peripheral end of such a reference guide shaft is, for example, screwed to a chassis or attached via a mounting piece provided on the chassis.

[0007]

However, in such a disk drive device, one end of the reference guide shaft is attached to the chassis directly or via a mounting piece or the like. There is a problem in that screws or mounting pieces are required, the number of parts is large, and the number of mounting steps for mounting them is required.

Accordingly, the present invention simplifies the mounting of the guide shaft for supporting the pickup movably in the radial direction of the recording medium disk to the chassis, thereby reducing the number of parts and the number of mounting steps, and manufacturing the pickup. It is an object to reduce costs.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a disk drive apparatus according to the present invention is a component in which one end of a guide shaft for guiding a pickup in a radial direction of a recording medium disk is supported by a chassis and a predetermined component. It is fixed between the support plate and the support plate.

Therefore, the disk drive of the present invention does not require a dedicated member for supporting only the guide shaft, and can contribute to a reduction in the number of components and a reduction in the number of assembly steps.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the disk drive of the present invention will be described with reference to the accompanying drawings.
In each of the illustrated embodiments, the present invention is applied to a CD-ROM drive mounted on a notebook personal computer.

FIGS. 1 to 13 show a first embodiment.

The CD-ROM drive 1 is provided with an outer casing 2 which is flat up and down and is open at the front. The outer casing 2 is composed of a lower bottom chassis 3 and a cover 4 fixed to the upper surface of the bottom chassis 3. The drawer 5 is supported by the outer casing 2 so as to be housed and pulled out. In this specification, when indicating a direction, the lower left in FIG. 1 is described as front, the upper right as rear, the upper left as left, the lower right as right, the upper as upper, and the lower as lower.

Then, on the right side of the bottom chassis 3,
A raised portion 3a is formed so that when the bottom chassis 3 is covered by the cover body 4, a portion other than the protruded portion 3a becomes a space 6, and a tray 7 described later is stored. (See FIG. 1).

The drawer 5 is formed by supporting a base unit 8 described later on a tray 7 made of synthetic resin. Although not shown, storage and extraction of the drawer 5 into and from the outer casing are performed by slide mechanisms provided on both right and left edges of the drawer 5.

The tray 7 has a planar shape and a rectangular external shape which is long in the front-rear direction, and has a width slightly smaller than the width of the space 6 of the outer casing 2 (see FIG. 1).

A concave portion 10 forming a part of a circle in which a CD-ROM 9 as a recording medium disk is disposed on the upper surface of the tray 7.
Are formed, and a base unit 8 described later is formed in the concave portion 10.
An opening 11 is formed to make the upper part face upward (see FIG. 2).

A front panel 12 is provided on the front of the tray 7.
Is attached. The front panel 12 is formed of a synthetic resin into a horizontally long plate shape, and the length in the left-right direction is substantially the same as the length in the left-right direction of the outer casing 2.

A base unit 8 is supported on the lower surface of the tray 7 of the drawer 5.

The base unit 8 is configured by mounting various components on a chassis 13.

That is, the CD-ROM 9 is mounted on the chassis 13.
, A spindle motor 15 for rotating the turntable 14, and a CD-RO
Optical pickup 16 for reading recorded information of M9
And guide shafts 17 and 18 for supporting the optical pickup 16 movably in the radius (R) direction of the CD-ROM 9.
And the sled motor 1 for moving the optical pickup 16
9 and so on. Note that the optical pickup 16 is guided with reference to the guide shaft 17 located on the right front side of the guide shafts 17 and 18.
The guide shaft 17 functions as a reference guide shaft, and the guide shaft 18 on the left rear side functions as a sub guide shaft (see FIG. 3).

The chassis 13 is made of a sheet metal material and is supported on the lower surface of the tray 7 via rubber dampers 20, 20, 20 (see FIG. 2).

The chassis 13 has a large opening 21 occupying almost all of the opening. The opening 21 has a substantially rectangular shape extending from the front left to the rear right, and the pickup opening 21 a inclined rearwardly with respect to other portions so as to extend substantially in the left-right direction; A turntable opening 21b which is continuous with the trailing edge of the turntable 21a and has a substantially semicircular shape;
And a sled motor opening 21c, which is continuous with a substantially central portion of a side edge facing the right front and has a substantially semicircular shape, is formed continuously.
The guide shaft support opening 21d is formed continuously so that the right rear end portion of the cover extends further obliquely rightward and rearward (see FIGS. 3 and 5).

The turntable 14 is arranged such that its upper end protrudes above the chassis 13 from the turntable opening 21b. That is, the spindle motor 1
A stator substrate 22 as a motor support plate supporting the motor 5 is fixed to the lower surface of the chassis 13 via three columns 23, 23, 23, and the turntable 14 is integrated with the spindle shaft 24 of the spindle motor 15. As a result, the turntable 14 is disposed at the above position (see FIGS. 3 and 5).

More specifically, the pickup opening 21a
At the left and right edges of the turntable opening 21b on the pickup opening 21a side and the back edge of the turntable opening 21b at the rear edge of the turntable opening 21b.
3c are projected downward by caulking, and these three columns 23a, 23b and 23c are formed in the same shape (see FIG. 5), and a screw hole is formed in the lower end surface thereof. .

On the stator substrate 22 on which the spindle motor 15 is supported, the above-mentioned three columns 23a, 23b, 23
c, screw insertion holes 25, 25, 25 are formed (see FIG. 5), and these screw insertion holes 25, 25, 2,
5, a screw insertion hole (hereinafter referred to as a “reference screw insertion hole”) 25 b corresponding to a column 23 b erected at the right edge of the pickup opening 21 b is provided in the spindle motor 1.
5 is accurately positioned with reference to the spindle shaft 24.

The screw holes 25a, 25b, 25c of the stator substrate 22 are provided with three columns 23a, 23
The stator substrate 22 is attached to the chassis 13 by superimposing the screws so as to match the screw holes of b and 23c and screwing the screws 26, 26 and 26 together.

In this state, the reference screw insertion hole 25b is provided with the support column 23 erected at the right edge of the pickup opening 21b.
Since the position of the column 23b is aligned with the screw hole b, the position of the column 23b is accurately determined in relation to the spindle shaft 24. As a result, the column 23b functions as a positioning member that serves as a reference for mounting positions, dimensions, and the like of each part, each part, and the like in the chassis 13, and thus,
This is referred to as a reference support 23b.

A pressing piece 27 is formed integrally with the chassis 13 so as to extend diagonally downward and diagonally to the right rear of the reference column 23b of the chassis 13 and to the left rear edge of the guide shaft support opening 21d. I have. Thereby, the chassis 1
3 is a horizontal and diagonally left front opening for supporting the guide shaft 2
When viewing 1d (viewed from the arrow A in FIG. 6), the pressing piece 27
A substantially inverted V-shaped space 28 that opens downward is formed between the reference column 23b and the reference column 23b (see FIGS. 6 and 7).

The optical pickup 16 is disposed so as to be movable in the pickup opening 21a in a direction in which the optical pickup 16 comes into contact with the turntable 14 (see FIG. 13).

The optical pickup 16 is an optical block (not shown) having a semiconductor laser or the like on a moving base 29, and the laser beam is supplied to the CD-ROM 9 mounted on the turntable.
An objective lens 30 for focusing light, a two-axis actuator (not shown) for moving the objective lens 30 in the focusing direction and the tracking direction, and the like are mounted (FIG. 11).
reference).

The movement locus of the optical pickup 16 as viewed from above the objective lens 30 matches the radius (R) direction of the CD-ROM 9 mounted on the turntable 14 (see FIG. 13). ).

The moving base 29 moves while being guided by the reference guide shaft 17 and the sub guide shaft 18. The reference guide shaft 17 has a round bar shape, and the sub guide shaft 1
8 is formed by bending a sheet metal material (see FIGS. 10 and 12). The moving base 29 is provided on the reference guide shaft 17.
Therefore, the reference guide shaft 17 needs to be accurately positioned with respect to the spindle shaft 24.

The sub-guide shaft 18 is formed integrally with a guide shaft support plate 32 which integrally supports the two guide shafts 17 and 18 to form a guide shaft assembly 31 (FIG. 5).
reference).

The guide shaft support plate 32 is formed of a sheet metal material having spring elasticity, has a plate shape slightly longer than the width of the tip of the pickup opening 21a, and has a reference guide shaft support 33 at the right end thereof. A sub-guide shaft connecting portion 34 is formed at the left end, and a mounting piece 35 is protrudingly provided at the center of the front edge in the left-right direction (see FIG. 5).

Screw holes 33a and 34a are formed in the reference guide shaft support portion 33 and the sub guide shaft connection portion 34, respectively (see FIG. 9).

The screw hole 3 of the reference guide shaft support 33
A concave portion 36 having an arc-shaped cross section is formed on the right rear side of 3a.
It is referred to as “outer peripheral end”. ) 17a is mounted, and the reference guide shaft 17 is fixed to the reference guide shaft support 33 by laser welding or the like in a state of being mounted in the concave portion 36 (see FIG. 10).

As a result, the reference guide shaft 17 can be fixed to the reference guide shaft support portion 33 without processing it while maintaining the shape of a round bar. Is extremely simple, the fixing step can be simplified accordingly, and if the position of the concave portion 36 of the reference guide shaft support portion 33 is precisely formed, the outer peripheral end of the reference guide shaft 17 can be formed. The position accuracy at the position 17a can be improved, which contributes to securing the parallelism of the reference guide shaft 17 with respect to the radius (R) direction of the CD-ROM 9.

The sub-guide shaft 18 is formed by bending one side edge of a long plate-like sheet metal material into a U-shape to form a guide portion 18a, and a mounting piece 18b protrudes from the rear end of the guide portion 18a. The front end of the guide portion 18a is
And is continuously connected to the sub-guide shaft connecting portion 34.

In this manner, the guide shaft assembly 31 is formed by integrating the reference guide shaft 17 and the sub-guide shaft 18 with the guide shaft support plate 32 (see FIG. 5).

The guide shaft assembly 31 is supported by the chassis 13 as described below (see FIG. 5).

First, the front ends of the reference guide shaft 17 and the sub guide shaft 18 are supported by the chassis 13 as follows.

That is, the mounting piece 35 of the guide shaft support plate 32 is fixed to the lower surface of the edge of the chassis 13 corresponding to the center of the front end of the pickup opening 21a by an appropriate means such as screwing. The adjusting screw 3 inserted from above through the screw insertion holes 37 formed at positions corresponding to the screw holes 33a 34a of the chassis 13.
8, 38 (see FIG. 5) are screwed into the screw holes 33a, 34a, respectively.

As described above, since the material of the guide shaft support plate 32 is a sheet metal material having spring elasticity, when the adjusting screws 38, 38 are screwed into the screw holes 33a, 34a, the reference guide is formed. The shaft supporting portion 33 and the sub-guide shaft connecting portion 34 approach the chassis 13, and conversely, the adjusting screw 3
When screws 8 and 38 are screwed back into screw holes 33a and 34a,
The reference guide shaft support portion 33 and the sub guide shaft connection portion 34 move away from the chassis 13. The adjustment of the adjusting screws 38 is a skew adjustment described later (see FIG. 9).

The sub-guide shaft 18 has a mounting piece 18b at its rear end fixed to the chassis 13 by screws (see FIG. 5).

The rear end (inner peripheral end) 17b of the reference guide shaft 17 is attached to the chassis 13 at the same time when the stator substrate 22 is attached to the chassis 13.

That is, the inner peripheral end 17 of the reference guide shaft 17
b is positioned in an inverted V-shaped space 28 formed by the pressing piece 27 formed on the chassis 13 and the reference column 23b, and when the stator substrate 22 is fixed to the chassis 13, the stator substrate 22 and the reference column 23b The reference guide shaft 17 is clamped between the pressing pieces 27 (see FIG. 7).

At this time, the inner peripheral end 17b of the reference guide shaft 17 is pressed against the reference column 23b and the stator substrate 22 by the elastic force of the pressing piece 27 and positioned. That is, the pressing piece 27 functions as a pressing unit that presses the inner peripheral end 17b of the reference guide shaft 17 against the reference support 23b.

The inner peripheral end 17b of the reference guide shaft 17 is
By being pressed against the reference column 23b, the positioning is accurately performed with respect to the reference column 23b, and thus the positioning with respect to the spindle shaft 24 is accurately performed.

Then, as described above, the reference guide shaft 1
7 is supported by the concave portion 36 of the reference guide shaft support portion 33 formed with high positional accuracy, the reference guide shaft 17 has a parallelism with respect to the radius (R) direction of the CD-ROM 9. Accuracy is ensured, so that the movement trajectory of the optical pickup 16 as viewed from above the objective lens 30 is represented by the C on the turntable 14.
It matches the radius (R) direction of the D-ROM 9.

The spindle shaft 2 with respect to both ends (the outer end 17a and the inner end 17b) of the reference guide shaft 17 is used.
Comparing the positional accuracy with the reference point 4 as the reference point, the inner peripheral end 1
The position accuracy of 7b is more accurate.

That is, the positioning is performed in the direction substantially perpendicular to the reference guide shaft 17 with respect to the reference support 23b.
Further, the positioning of the spindle shaft 24 in the axial direction with respect to the stator substrate 22 is performed. Moreover, since the reference for such positioning is the reference column 23b and the stator substrate 22, the positioning with respect to the spindle shaft 24 is performed with high accuracy (see FIG. 7).

Thus, the displacement (displacement in the tangential direction) of the movement locus of the objective lens 30 of the optical pickup 16 with respect to the radius (R) direction of the CD-ROM 9 is determined by the positioning accuracy of the inner peripheral end of the reference guide shaft 17. Therefore, if the inner peripheral end 17b of the reference guide shaft 17 is accurately positioned, the outer peripheral end 17a of the reference guide shaft 17 is slightly roughened. However, problems such as tracking errors do not occur.

At the right end of the moving base 29, a guided portion 39,
A connecting portion 40 is formed at a portion between the guided portions 39, 39, and a connecting hole 40a is formed in the connecting portion 40. The guided portions 39, 39 are formed with guided holes 39a, 39a located coaxially. Further, at the left end of the movable base 29, guided pieces 41, 41 which are vertically separated and project in parallel are formed (see FIG. 11).

Thus, the reference guide shaft 17 is slidably inserted into the guided holes 39a, 39a of the movable base 29, and the guided pieces 41, 41 of the movable base 29 are vertically The optical pickup 16 is supported by the chassis 13 so as to be guided by the reference guide shaft 17 and the sub-guide shaft 18 so as to move slidably on both surfaces (see FIG. 12).

Then, the CD-ROM of the laser beam focused on the CD-ROM 9 placed on the turntable 14
9, that is, skew adjustment, the adjustment screws 38, 38 are operated to adjust the reference guide shaft support 3.
This is performed by adjusting the distance between the chassis 3 and / or the sub-guide shaft connecting portion 34, that is, the distance between the reference guide shaft 17 and / or the sub-guide shaft 18 and the chassis 13.

Next, the radius (R) of the CD-ROM 9 on which the optical pickup 16 is mounted on the turntable 14 is set.
The mechanism for moving in the direction will be described.

A motor support plate 42 supporting the thread motor 19 has three columns 43, 43,
The thread motor 19 is fixed via the thread 43 and the thread motor 19 is positioned in the thread motor opening 21b. Thread motor 1
A drive gear portion 44 is formed on the outer peripheral portion of the 9th rotor 19a over substantially half the circumference (see FIG. 13).

The optical pickup 16 has a rack member 4
5 are connected.

The rack member 45 is formed of a synthetic resin, and the rack teeth 46 having an elongated plate shape are provided on one surface thereof.
6a, 46a,... Are arranged in the longitudinal direction. A connecting piece 47 protrudes from a surface of the rack portion 46 opposite to the surface on which the rack teeth 46a, 46a,... Are formed, and a connecting pin 47a is vertically provided at a tip end of the connecting piece 47. . In addition, inverted L-shaped engaging pieces 48, 48 are provided at two positions on the surface of the connecting piece 47 on which the connecting piece 47 is formed.
Are formed (see FIG. 11).

The engagement pieces 48 of the rack member 45
48 is slidably engaged with the reference guide shaft 17, and the connecting pin 47 a of the connecting piece 47 is engaged with the connecting hole 40 a of the moving base 29 of the optical pickup 16. The rack member 45 is integrally guided and moved by the reference guide shaft 17 and the sub guide shaft 18.

The rack teeth 46a of the rack member 45,
Are meshed with the driving gear portion 44. Therefore, when the thread motor 19 is driven,
The rack member 45 is fed by the rotating drive gear unit 44, and the optical pickup 16 is guided by the reference guide shaft 17 and the sub-guide shaft 18 integrally with the rack member 45, and the radius of the CD-ROM 9 placed on the turntable 14. (R) direction (see FIG. 13).

As described above, since the objective lens 30 of the optical pickup 16 moves while being guided by the reference guide shaft 17 positioned with high accuracy with respect to the spindle shaft 24, the movement trajectory viewed from above. Corresponds to the radius (R) direction of the CD-ROM 9 placed on the turntable 14.

In the above embodiment, the sub guide shaft 18 is formed integrally with the guide shaft support plate 32. However, the sub guide shaft 18 is formed separately from the guide shaft support plate, and the sub guide shaft is attached to the guide shaft support plate. It may be fixed.

FIG. 14 to FIG. 17 show the second embodiment.

The only difference between the disk drive 1A according to the second embodiment and the disk drive 1 according to the first embodiment is the structure for positioning the reference guide shaft. Therefore, only the different parts will be described, and the description of the parts that are not different will be omitted, and the parts other than the main parts and similar to those in the first embodiment will be described in the first embodiment.
The description thereof is omitted by giving the same reference numerals to the same parts in the embodiment. Further, the third to fifth embodiments to be described later are also described in the second embodiment.
In the following, only the different parts will be described in the same manner as in the first embodiment, and the parts other than the main parts, which are the same as those in the first embodiment, will be the same as those in the first embodiment. The description thereof will be omitted by giving the same reference numerals to the reference numerals attached to.

In the disk drive device 1 according to the first embodiment, the positioning of the reference guide shaft 17 is performed by pressing the reference guide shaft 23b against the reference support column 23b as a positioning member with a pressing piece 27. In the disk drive 1A according to the second embodiment, a positioning piece is provided as a positioning member, and a reference guide shaft is pressed against the positioning piece by a motor substrate (stator substrate 22). Therefore,
The illustration is made only for the main part.

Guide shaft support opening 21 of chassis 13
A positioning piece 51 having an “inverted concave shape” is provided integrally with the opening edge facing the left front of d so as to be bent downward (see FIG. 15). In addition, FIG.
FIG. 16 is a view as seen in the direction of the arrow C in FIG. 14, and FIG. 16 is a view as viewed in the direction of the arrow D in FIG.

The rectangular notch 52 opened below the positioning piece 51 has a width substantially equal to the diameter of the reference guide shaft 17 and a vertical depth smaller than the diameter of the reference guide shaft 17. ing. Also, the positioning piece 51
Is formed to be slightly smaller than the height of the reference column 23b. The positioning piece 51 is formed with high positional accuracy with respect to the spindle shaft 24. In particular, the left edge 52 of the rectangular notch 52 of the positioning piece 51
a and the back edge 52b are formed with high positional accuracy.

The right end 22 of the stator substrate 22
“a” extends obliquely rightward and rearward of the positioning piece 51 (see FIGS. 14 and 17).

The inner peripheral end 17b of the reference guide shaft 17 is attached to the chassis 13 at the same time when the stator substrate 22 is attached to the chassis 13. The positioning piece 51 and the stator substrate Positioned by 22.

That is, the inner peripheral end 17 of the reference guide shaft 17
b is fitted into the rectangular notch 52 of the positioning piece 51, and in this state, the stator substrate 22 is screwed to the chassis 13 via the columns 23, 23, 23.

As a result, the reference guide shaft 17 has its inner peripheral end 17b positioned within the rectangular notch 52 of the positioning piece 51, and is held between the positioning piece 51 and the right end 22a of the stator substrate 22. At this time, the reference guide shaft 1
7 has a rectangular notch 52 of a positioning piece 51.
Is pressed against the left edge 52a and the inner edge 52b, and the inner peripheral end 17b of the reference guide shaft 17 is accurately positioned.
Further, the right end 22 a of the stator substrate 22 functions as a pressing piece for pressing the reference guide shaft 17 into the rectangular notch 52.

When the stator substrate 22 is attached to the chassis 13, the inner edge 5 of the rectangular notch 52 of the positioning piece 51 is
2b and the distance between the stator substrate 22 and the reference guide shaft 1
By setting the diameter slightly smaller than the diameter of 7, the holding of the reference guide shaft 17 can be further strengthened.

Further, the notch 52 of the positioning piece 51 is formed in a rectangular shape, but may be any opening downward, and may be, for example, an inverted V-shape or an inverted U-shape.

FIGS. 18 to 21 show the third embodiment.

In the disk drive 1 according to the first embodiment, the positioning member of the reference guide shaft 17 is the reference support 23b. However, the disk drive 1B according to the third embodiment has In this case, the positioning member is a positioning piece provided on the chassis 13. Therefore, the illustration is made only for the main part.

Guide shaft support opening 21 of chassis 13
A mounting piece 53 on which a positioning piece and a pressing piece, which will be described later, are formed, is formed over an opening edge facing the right front and an opening edge facing the left front of d. An opening edge 53a facing toward the front and an opening edge 53b facing toward the left front are formed.

A positioning piece 54 is integrally protruded from an opening edge 53a of the mounting piece 53 facing the right front so as to be bent downward. The pressing piece 55 is integrally formed diagonally downward (see FIGS. 19 and 20). The positioning piece 54 is formed with high positional accuracy with respect to the spindle shaft 24. In particular, the left edge 5
4a is formed with high positional accuracy.

Thus, when the guide shaft supporting opening 21d of the chassis 13 is viewed horizontally and obliquely from the left front (as viewed from the arrow E in FIG. 18), the pressing piece 55 and the positioning piece 5
4, a substantially inverted V-shaped space 56 that opens downward (see FIGS. 19 and 20). FIG. 19 is a view as viewed in the direction of the arrow E in FIG. 18, and FIG. 20 is a view as viewed in the direction of the arrow F in FIG.

The rear end 42a of the motor support plate 42 of the sled motor 19 extends obliquely rightward and rearward of the positioning piece 54 (see FIGS. 18 and 21).

The inner peripheral end 17b of the reference guide shaft 17 is attached to the chassis 13 by the thread motor 19.
When attaching the motor support plate 42 to the chassis 13,
The positioning piece 54 and the motor support plate 4
2 position.

That is, the inner peripheral end 17 of the reference guide shaft 17
b is positioned in an inverted V-shaped space 56 formed by the pressing piece 55 and the positioning piece 54 formed on the chassis 13, and the motor support plate 42 is screwed to the chassis 13 via the columns 43, 43, 43. I do.

Thus, the rear end 4 of the motor support plate 42
The reference guide shaft 17 is clamped between 2a, the positioning piece 54 and the pressing piece 55 (see FIG. 19).

At this time, the inner peripheral end 17b of the reference guide shaft 17 is pressed against the positioning piece 54 and the rear end 42a of the motor support plate 42 by the elastic force of the pressing piece 55.
Positioned.

FIG. 22 to FIG. 25 show a fourth embodiment.

In the disk drive 1B according to the third embodiment, the reference guide shaft 17 is held between the motor support plate of the sled motor and the pressing piece 55. In the disk drive device 1C according to the present embodiment, the reference guide shaft 17 is sandwiched between the stator substrate 22 of the spindle motor 15 and the pressing piece 55. Therefore, the illustration is made only for the main part.

The positioning piece and the pressing piece of the disk drive device 1C according to the fourth embodiment are similar to the positioning piece 54 and the pressing piece 55 of the third embodiment, and are used for supporting the guide shaft of the chassis 13. The attachment piece 53 formed in the opening 21d is formed integrally with an opening edge 53a facing right front and an opening edge 53b facing left front (see FIGS. 23 and 24).

Thus, when the guide shaft supporting opening 21d of the chassis 13 is viewed horizontally and obliquely from the left front (as viewed from the direction of arrow G in FIG. 22), the pressing piece 55 and the positioning piece 5
4, a substantially inverted V-shaped space 56 that opens downward (see FIGS. 23 and 24). Note that FIG. 23 is a view as viewed in the direction of the arrow G in FIG. 22, and FIG. 24 is a view as viewed in the direction of the arrow H in FIG.

The right end portion 22 of the stator substrate 22
a is a positioning piece 54 similar to the second embodiment.
(See FIGS. 22 and 25).

The inner peripheral end 17b of the reference guide shaft 17 is attached to the chassis 13 at the same time when the stator substrate 22 is attached to the chassis 13. The positioning piece 54 and the stator substrate Positioned by 22.

That is, the inner peripheral end 17 of the reference guide shaft 17
b is positioned in an inverted V-shaped space 56 formed by the pressing piece 55 and the positioning piece 54 formed on the chassis 13, and the stator substrate is mounted on the chassis 1 via the columns 23, 23, 23.
Screw on 3.

Thus, the right end 2 of the stator substrate 22 is
Reference guide shaft 17 is clamped between 2a, positioning piece 54 and pressing piece 55 (see FIG. 23).

At this time, the inner peripheral end 17b of the reference guide shaft 17 is pressed against the positioning piece 54 and the right end 22a of the stator substrate 22 by the resilient force of the pressing piece 55.
Positioned.

FIGS. 26 to 30 show the fifth embodiment.

In the disk drive 1B according to the third embodiment, the pressing piece 55 is
The disk drive device 1D according to the fifth embodiment has a pressing piece formed separately from the chassis 13 in the fifth embodiment. Therefore, the illustration is made only for the main part.

Guide shaft support opening 21 of chassis 13
A mounting piece 5 on which a positioning piece described later is formed to extend over an opening edge facing right front and an opening edge facing left front of FIG.
The mounting piece 53 has an opening edge 53a facing right front and an opening edge 53b facing left front (see FIG. 26).

A positioning piece 54 is formed integrally with the opening edge 53b facing the left front of the mounting piece 53 downward (see FIGS. 27 and 28). The positioning piece 54 is formed with high positional accuracy with respect to the spindle shaft 24. In particular, the left edge 54a of the positioning piece 54 is formed with high positional accuracy.

A screw hole 57 is formed diagonally to the right of the column 23 in the vicinity of the positioning piece 54 of the chassis 13, and the screw hole 57 is made of a sheet metal material and is bent in a substantially rectangular shape. The pressing piece 58 is attached by a screw 59, and the bent piece 58a of the pressing piece 58 is disposed so as to extend diagonally to the left and rearward and downward (see FIGS. 27 and 30).

When the guide shaft supporting opening 21d of the chassis 13 is viewed horizontally and obliquely from the front left (as viewed from the arrow I in FIG. 26), the bent piece 58a of the pressing piece 58
A substantially inverted V-shaped space 60 opening downward is formed between the positioning piece 54 and the positioning piece 54 (see FIGS. 27 and 28).
FIG. 27 is a view taken in the direction of the arrow I in FIG.
FIG. 27 is a view as viewed from the direction of the arrow J in FIG. 26.

The right end 22 of the stator substrate 22
“a” extends obliquely rightward and rearward of the positioning piece 54 (see FIGS. 26 and 29).

The inner end 17b of the reference guide shaft 17 is attached to the chassis 13 at the same time when the stator substrate 22 is attached to the chassis 13. The positioning piece 54 and the stator substrate Positioned by 22.

That is, the inner peripheral end 17 of the reference guide shaft 17
b is positioned in an inverted V-shaped space 60 formed by the pressing piece 58 and the positioning piece 54 formed on the chassis 13, and the stator substrate is mounted on the chassis 1 via the columns 23, 23, 23.
Screw on 3.

Thus, the right end 2 of the stator substrate 22
Reference guide shaft 17 is clamped between 2a, positioning piece 54 and pressing piece 58 (see FIG. 27).

At this time, the inner peripheral end 17b of the reference guide shaft 17 is pressed against the positioning piece 54 and the right end 22a of the stator substrate 22 by the elastic force of the pressing piece 58,
Positioned.

In each of the above embodiments, the present invention is applied to a CD-ROM.
Although shown is one applied to a ROM drive, the present invention
It can be widely applied to disk drive devices other than CD-ROM drives.

[0107]

As is apparent from the above description, the disk drive device of the present invention has a chassis and a component support plate attached to the chassis via a plurality of columns and supporting predetermined components. And a guide shaft for guiding the pickup in the radial direction of the recording medium disk, and one end of the guide shaft is fixed by being sandwiched between the chassis and the component support plate.

Therefore, in the disk drive of the present invention, a dedicated member for supporting only the guide shaft is not required, which can contribute to a reduction in the number of parts and a reduction in the number of assembly steps.

According to the present invention, a positioning piece for positioning the guide shaft is provided on the chassis or the component support plate, and the guide shaft is pressed against the positioning piece so that the guide shaft and the component support plate are pressed. Since the parts are held between the plates, the guide shaft can be positioned at the same time when the parts support plate is mounted on the chassis, so that the assemblability can be improved and the number of assembling steps can be reduced.

According to the third and fourth aspects of the present invention, the pressing piece is provided near the positioning piece, and the guide shaft is pressed against the positioning piece by the pressing piece. The shaft can be pressed against the positioning piece, and the positioning of the guide shaft can be facilitated.

In the inventions described in claims 5 to 8, since the component support plate is a stator substrate of the spindle motor, there is no need to separately provide a component support plate, which contributes to simplification of the configuration. can do.

In the ninth to twelfth aspects of the present invention, since the component support plate is a motor support plate for a thread motor, there is no need to separately provide a component support plate, and the structure can be simplified. Can contribute.

In the inventions according to the thirteenth to twenty-fourth aspects, since the pressing piece is formed integrally with the chassis, it is not necessary to separately provide a pressing piece, which contributes to simplification of the configuration. be able to.

The shape and structure of each part shown in each of the above-described embodiments are merely examples of the embodiment to be carried out in carrying out the present invention. The scope should not be construed as limiting.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the disk drive device of the present invention together with FIG. 2 to FIG. 13, and is an overall perspective view showing a state where a tray is pulled out from an outer casing.

FIG. 2 is an overall exploded perspective view.

FIG. 3 is a plan view of a base unit.

FIG. 4 is a bottom view of the base unit.

FIG. 5 is an exploded perspective view of a main part.

FIG. 6 is an enlarged plan view showing a main part.

FIG. 7 is a view as viewed in the direction of the arrow A in FIG. 6;

FIG. 8 is an enlarged bottom view showing a main part.

FIG. 9 is a sectional view taken along the line IX-IX of FIG. 3;

FIG. 10 is a sectional view taken along line XX of FIG. 3;

FIG. 11 is a perspective view showing a movable base and a rack member separately.

FIG. 12 is a sectional view taken along the line XII-XII in FIG. 3;

FIG. 13 is a plan view showing a state where the optical pickup is located at the outermost periphery of the CD-ROM.

FIG. 14 shows a second embodiment of the disk drive device of the present invention together with FIGS. 15 to 17;
It is a top view which expands and shows a principal part.

15 is a view as viewed in the direction of arrow C in FIG. 14;

FIG. 16 is a view as seen from the direction of arrow D in FIG. 14;

FIG. 17 is an enlarged bottom view showing a main part.

FIG. 18 shows a third embodiment of the disk drive device of the present invention together with FIGS. 19 to 21.
It is a top view which expands and shows a principal part.

19 is a view as viewed from the direction of the arrow E in FIG. 18;

20 is a view as viewed from the direction of the arrow F in FIG. 18;

FIG. 21 is an enlarged bottom view showing a main part.

FIG. 22, together with FIGS. 23 to 25, shows a fourth embodiment of the disk drive device of the present invention.
It is a top view which expands and shows a principal part.

FIG. 23 is a view as viewed in the direction of the arrow G in FIG. 22.

24 is a view as viewed in the direction of the arrow H in FIG. 22.

FIG. 25 is an enlarged bottom view showing a main part.

FIG. 26 shows a fifth embodiment of the disk drive device of the present invention together with FIGS. 27 to 30.
It is a top view which expands and shows a principal part.

27 is a view as viewed from the direction of the arrow I in FIG. 26.

28 is a view as viewed in the direction of the arrow J in FIG. 26.

FIG. 29 is an enlarged bottom view showing a main part.

30 is a sectional view taken along the line XXX-XXX in FIG.

[Explanation of symbols]

1. CD-ROM drive (disk drive device),
Reference numeral 9: CD-ROM (recording medium disk), 13: chassis, 15: spindle motor (predetermined parts), 16: optical pickup (pickup), 17: reference guide shaft (guide shaft), 17b: inner peripheral end ( One end), 19: Thread motor, 22: Stator board (component support plate), 23
a: support, 23b: reference support (positioning member), 23c
.., Support column, 27 ... pressing piece (pressing means), 42 ... motor support plate (part support plate), 43 ... support column, 1A ... disk drive device, 51 ... positioning piece (positioning member), 1B ... disk drive device, 54 Positioning piece (positioning member), 55: Pressing piece, 1C: Disk drive device, 1
D: disk drive device, 58: pressing piece

Claims (24)

[Claims] 1. A system comprising: a chassis; a component support plate attached to the chassis via a plurality of columns and supporting predetermined components; and a guide shaft for guiding a pickup in a radial direction of a recording medium disk. A disk drive device wherein one end of the guide shaft is sandwiched and fixed between the chassis and the component support plate. 2. The disk drive device according to claim 1, wherein a positioning member for positioning the guide shaft is provided on the chassis or the component support plate, and the guide shaft is pressed against the positioning member so that the guide shaft is connected to the chassis and the component support plate. A disk drive device characterized by being sandwiched by: 3. The disk drive device according to claim 1, wherein a pressing piece is provided near the positioning member, and the guide shaft is pressed against the positioning member by the pressing piece. 4. The disk drive device according to claim 2, wherein a pressing piece is provided near said positioning member, and said guide shaft is pressed against said positioning member by said pressing piece. 5. The disk drive device according to claim 1, wherein said component support plate is a stator substrate of a spindle motor. 6. The disk drive according to claim 2, wherein said component support plate is a stator substrate of a spindle motor. 7. The disk drive device according to claim 3, wherein the component support plate is a stator substrate of a spindle motor. 8. The disk drive according to claim 4, wherein said component support plate is a stator substrate of a spindle motor. 9. The disk drive according to claim 1, wherein the component support plate is a motor support plate of a sled motor. 10. The disk drive device according to claim 2, wherein said component support plate is a motor support plate of a sled motor. 11. The disk drive device according to claim 3, wherein said component support plate is a motor support plate of a sled motor. 12. The disk drive device according to claim 4, wherein said component support plate is a motor support plate of a sled motor. 13. The disk drive device according to claim 1, wherein the pressing piece is formed integrally with a chassis. 14. The disk drive according to claim 2, wherein the pressing piece is formed integrally with a chassis. 15. The disk drive device according to claim 3, wherein the pressing piece is formed integrally with a chassis. 16. The disk drive device according to claim 4, wherein said pressing piece is formed integrally with a chassis. 17. The disk drive device according to claim 5, wherein the pressing piece is formed integrally with a chassis. 18. The disk drive according to claim 6, wherein the pressing piece is formed integrally with a chassis. 19. The disk drive according to claim 7, wherein the pressing piece is formed integrally with a chassis. 20. The disk drive according to claim 8, wherein the pressing piece is formed integrally with a chassis. 21. The disk drive device according to claim 9, wherein the pressing piece is formed integrally with a chassis. 22. The disk drive device according to claim 10, wherein the pressing piece is formed integrally with a chassis. 23. The disk drive device according to claim 11, wherein the pressing piece is formed integrally with a chassis. 24. The disk drive device according to claim 12, wherein said pressing piece is formed integrally with a chassis.