JP2002117634A - Disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the performance degradation in the recording or the playback of a information signal by eliminating plays due to gaps between a sliding member 38, on which a pickup 39 is mounted and a subguide shaft 36 which guides the sliding member 38. SOLUTION: The play between the sliding member 38 and the subguide shaft 36 is eliminated by attaching an elastic pressing member (for example, leaf spring) 44 to press-contact the subguide shaft 36 to the sliding member 38, and pressing the sliding member 38 on the subguide shaft 36 with the elastic pressing member 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for rotating a disk-shaped recording medium such as an optical disk, a magneto-optical disk, and a magnetic disk, and moving a pickup device along an information recording surface of the disk-shaped recording medium. The present invention relates to a disk drive device for recording (writing) and / or reproducing (reading) a signal.

[0002]

2. Description of the Related Art Conventionally, optical disks such as CDs (compact disks) and CD-ROMs (read only memories), magneto-optical disks such as MDs (mini disks), magnetic disks such as FDs (floppy disks), and the like have been generally used. 2. Description of the Related Art A disk drive device is provided as a device for recording and / or reproducing information signals using a disk-shaped recording medium. As such a disk drive device, for example, there is one having a configuration as shown in FIGS.

In this disk drive device, an optical disk is horizontally mounted on a turntable attached to a rotating shaft of a spindle motor and driven to rotate, and a laser beam is applied to an information recording surface of the optical disk by an optical pickup. Like that. The optical pickup is moved radially outward from the center of the optical disc, and an information signal is written on the information recording surface by the optical pickup, or the information signal recorded in advance on the information recording surface is read. Recording and / or reproduction.

As shown in FIGS. 28 and 29, the disk drive device 1 includes a base unit chassis 2, a spindle motor 3, a turntable 4, an optical pickup device 5, a feed screw shaft 6, a feed motor 7, and the like. It is configured. The spindle motor 3 is mounted on the lower surface side of the base unit chassis 2, and the rotating shaft 3 a of the spindle motor 3 projects on the upper surface side of the base unit chassis 2, and the turntable 4 is fixed to this. An optical disk 8 as a disk-shaped recording medium is mounted on the turntable 4.

A guide shaft 9 is attached to the base unit chassis 2, and a sub-guide shaft 10 is provided in parallel with the guide shaft 9. The optical pickup device 5 is mounted on the guide shaft 9 and the sub-guide shaft 10. Is supported so as to be movable in the radial direction of the optical disk 8. The optical pickup device 5 has a configuration in which an optical pickup 12 is mounted on a slide member 11 supported by a guide shaft 9 and a sub-guide shaft 10. The information recording surface of the disk 8 is irradiated with a laser beam for recording or reproducing.

The feed screw shaft 6 is driven to rotate by a feed motor 7, and is attached to the base unit chassis 2 adjacent to and parallel to the guide shaft 9. A nut member 14 attached to the slide member 11 of the optical pickup device is engaged with the thread portion of the feed screw shaft 6. When the feed motor shaft 6 is rotated by the feed motor 7, the nut member 14 is The optical pickup device 5 is moved in the axial direction of the shaft 6, and the optical pickup device 5 is moved in the radial direction of the optical disk 8 along the guide shaft 9 and the sub-guide shaft 10 integrally therewith.

Attention is paid to the support structure of the optical pickup device 5 in the conventional disk drive device configured as described above. As shown in FIGS. 29 and 31, the slide member 11 of the optical pickup device 5 is provided at one end side. The bearing 15 is movably supported by the guide shaft 9, and the bearing 16 provided on the other end is movably supported by the sub-guide shaft 10.

In this case, as shown in FIG. 31, a sleeve 15a is fitted to the bearing 15 at one end, and the guide shaft 9 is slidably inserted through the sleeve 15a. On the other hand, the sub-guide shaft 10 is
A groove 16a sandwiching the sub-guide shaft 10 from above and below is formed, and the groove 16a is slidably engaged with the sub-guide shaft 10.

[0009]

The conventional disk drive device having such a structure has the following problems. That is, conventionally, in a portion where the slide member 11 of the optical pickup device 5 is supported by the sub guide shaft 10 of the base unit chassis 21, FIGS.
The groove 16a of the bearing portion 16 of the slide member 11 as shown in FIG.
There is a gap in the vertical direction between the sub guide shaft 10 and
Therefore, when vibration or shock is applied to the disk drive device, the optical pickup rattles by the amount of the gap, and the irradiation of the laser beam to the optical disk becomes unstable. there were.

The present invention has been made in view of such a conventional problem, and provides a disk drive device in which the pickup does not rattle even when vibration or impact is applied, and solves the conventional problem. It is intended to be.

[0011]

In order to solve the above-mentioned problems and achieve the above object, a disk drive device according to claim 1 of the present application records or reproduces data on or from a disk-shaped recording medium. A slide member having a pickup mounted thereon, a guide shaft inserted through the slide member and guiding the slide member to move in the radial direction of the disk-shaped recording medium, and the slide member slidingly contacting the slide member together with the guide shaft. In a disk drive device including a sub-guide shaft for guiding a radial movement of a linear recording medium and a feed mechanism for moving a slide member along the guide shaft and the sub-guide shaft, a sub-guide is provided for the slide member. Attach an elastic pressing member that presses against the shaft, and press the slide member against the sub-guide shaft with the elastic pressing member. It is obtained by the elephants.

Further, in the disk drive device according to claim 2 of the present application, the feed mechanism is provided in parallel with the guide shaft, and is provided with a feed screw shaft which is driven to rotate by a motor.
In a disk drive device constituted by a nut member meshed so as to be pressed against the feed screw shaft from the slide member, when the nut member is pushed back from the feed screw shaft, the slide member rotates around the guide shaft as a fulcrum and the sub guide shaft is rotated. The elastic pressing member is arranged so as to be pressed against the sub guide shaft from the side opposite to the portion pressed against the sub guide shaft.

Further, in the disk drive device according to a third aspect of the present invention, a leaf spring is used as the elastic pressing member.

Further, in the disk drive device according to a fourth aspect of the present invention, the pressing portion of the leaf spring, which is the elastic pressing member, against the sub-guide shaft is bent in an arc shape.

Further, in the disk drive device according to the fifth aspect of the present invention, the leaf spring, which is an elastic pressing member, is fixed to the slide member by tightening with a screw.

Further, in the disk drive device according to a sixth aspect of the present invention, at a portion where the slide member is pressed against the sub-guide shaft, a part of the leaf spring is interposed between the slide member and the sub-guide shaft. It was done.

Claim 1 of the present application configured as described above
In the disk drive device described in (1), since the slide member is pressed against the sub-guide shaft by the elastic pressing member, the pickup can be stably moved without rattling even when vibration or impact is applied, so that the information signal There is no decrease in the recording or reproduction performance of.

Further, in the disk drive device according to the second aspect of the present invention, when vibration or impact is applied, the slide member rotates about the guide shaft as a fulcrum due to the nut member being pushed back from the feed screw shaft. Even when the elastic pressing member is pressed against the sub-guide shaft from the side opposite to the portion where the slide member is pressed against the sub-guide shaft, the elastic pressing member is Since the slide member is always stably pressed against the sub guide shaft without being pushed back, rattling of the pickup is more reliably prevented.

Further, in the disk drive device according to the third aspect of the present invention, the use of a leaf spring as the elastic pressing member makes it possible to implement the disk drive at low cost.

Further, in the disk drive device according to the fourth aspect of the present invention, the pressing portion of the leaf spring, which is the elastic pressing member, against the sub-guide shaft is bent in an arc shape, so that the leaf spring is moved when the pickup is moved. Since the slide is smoothly slid with respect to the sub-guide shaft, a more stable movement of the pickup is performed.

Further, in the disk drive device according to the fifth aspect of the present invention, since the leaf spring, which is an elastic pressing member, is fixed to the slide member by tightening with a screw, the leaf spring can be easily attached. It is more advantageous for implementation at low cost.

Further, in the disk drive device according to the sixth aspect of the present invention, a structure in which a part of the leaf spring is interposed between the slide member and the sub-guide shaft at a portion where the slide member is pressed against the sub-guide shaft. As a result, the wear of the slide member can be effectively suppressed, so that the pickup does not tilt, and more stable recording or reproduction can be performed.

[0023]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 10 show a first embodiment of the disk drive device of the present invention.
1 is a perspective view of the first embodiment of the disk drive device as viewed from above, FIG. 2 is a plan view of the disk drive device, FIG. 3 is a bottom view, and FIG. FIG. 5 is a cross-sectional view taken along the line XX of FIG. 2, FIG. 6 is a rear view showing a main part cut away, FIG. 7 is a left side view, and FIG. 8 is a cross-sectional view taken along the line YY of FIG. FIG. 9 is an enlarged view of a main part of FIG. 6, and FIG. 10 is an enlarged view of a main part of FIG.

A disk drive device 20 shown as an embodiment of the present invention is a read-only type in which a music signal such as audio information, a video signal such as video information, and an information signal such as a music signal are recorded in advance as a disk-shaped recording medium. Or an optical disc of a recordable type in which an information signal such as audio information and video information can be recorded once (write-once type) or can be repeatedly recorded many times (rewritable type). However, the disk-shaped recording medium is not limited to this, and it is formed in the same manner as a magnetic disk in which a magnetic thin film layer is formed on the surface of a thin disk to store information according to the magnetization state at a specific position. It goes without saying that a magneto-optical disk or other storage medium in which information is written or read by using an optical head and a magnetic head on the magnetic thin film layer can be applied.

This disk drive device 20 is shown in FIGS.
As shown in FIG. 4, the system includes a base unit chassis 21, a base unit sub-chassis 22, a spindle motor 23, a turntable 24, an optical pickup device 25, a feed screw shaft 26, a feed motor 27, and the like. The base unit chassis 21 is formed of an engineering plastic such as ABS, for example.
A flat plate portion 21a, and a front wall portion 21b, a rear wall portion 21c, and left and right side wall portions 21 protruding from the lower surface along an outer peripheral edge so as to surround the flat portion 21a.
d and 21e, and are formed in a shape like a lid having a shallow bottom as a whole.

As shown in FIG. 3, a motor base plate 31 is provided with a mounting screw 32 on the lower surface side of the base unit chassis 21.
The spindle motor 23 is formed on the motor base plate 31. Then, as shown in FIG. 1 and FIG.
a projects to the upper surface side of the base unit chassis 21, and the turntable 24 is fixed to the rotating shaft 23a. An optical disk 33 as a disk-shaped recording medium is mounted on the turntable 24.

The turntable 24 has a fitting portion 24a fitted into the center hole of the optical disk 33, and a mounting portion 24b connected to the lower end of the fitting portion 24a and on which the optical disk 33 is mounted. And a plurality of lock claws 24c for locking the center hole of the optical disk 33 mounted on the mounting portion 24b to prevent the optical disk 33 from coming out. The diameter of the fitting portion 24a of the turntable 24 is slightly smaller than the inner diameter of the center hole of the optical disc 33, and can be inserted into and removed from the center hole.

In the present embodiment, three lock claws 24c of the fitting portion 24a of the turntable 24 are provided, and these three lock claws 24c are arranged at equal angular intervals in the circumferential direction. Each lock claw 24c is an elastic body such as a coil spring (otherwise, a leaf spring, a rubber-like elastic body, or the like can be applied).
Is always urged radially outward. That is, 3
The distal ends of the lock claws 24c protrude outward by an appropriate amount from the outer peripheral surface of the fitting portion 24a so as to lock the peripheral edge of the center hole of the optical disc 33. The optical disk 33 is chucked. On the other hand, by pushing each of the three lock claws 24c into the fitting portion 24a against the urging force of the elastic body, the chucking of the optical disk 33 by the lock claws 24c can be released.

In order to facilitate the operation of chucking and releasing the optical disk 33, each lock claw 24
On the upper surface and the lower surface of the distal end portion c, an inclined portion having an appropriate size is provided. According to the turntable 24, the optical disc 33 is chucked by the action of the three lock claws 24c, and is integrally rotated in this state. On the other hand, for example, by causing the optical disk 33 to be inclined obliquely and retracting the lock claw 24c with the force to escape from the center hole, the chucking state can be released and the optical disk 33 can be easily removed. .

The mounting portion 24b of the turntable 24 is provided with a disk supporting surface 24d made of a rubber-like elastic material or plastic having a high frictional resistance. The disk support surface 24d elastically supports the peripheral portion of the center hole and prevents slippage under the pressing force of the action of the three lock claws 24c, and prevents the optical disk 33 from rotating integrally with the turntable 24. Work to make it work.

The base unit chassis 21 has the structure shown in FIG.
As shown in FIG. 4, a guide shaft 34 is attached, and a sub-guide shaft 36 is provided in parallel with the guide shaft 34. The optical pickup device 25 is mounted on the guide shaft 34 and the sub-guide shaft 36 by an optical disk 33. Are supported to be movable in the radial direction.

The guide shaft 34 is a round bar-shaped member having a smooth peripheral surface.
1 is supported in a state of being engaged with the concave bearing portions 35a and 35b provided in the first bearing 1. As a material of the guide shaft 34, for example, stainless steel is suitably used. On the other hand, the sub-guide shaft 36 is a round bar-shaped shaft portion formed integrally with the base unit chassis 21.
6 is formed continuously on the inner surface side of the rear wall portion 21c of the base unit chassis 21 via the connecting portion 37.

The optical pickup device 25 includes a guide shaft 3
An optical pickup 39 is mounted on a slide member 38 supported and moved by the sub-guide shaft 4 and the sub-guide shaft 36, and the optical head 40 of the optical pickup 39 is attached to the flat portion 21 a of the base unit chassis 21. A laser beam for recording or reproducing information on or from the information recording surface of the optical disc 33 is irradiated from the objective lens 40a of the optical head 40 through the opening 41 formed.

The slide member 38 is made of, for example, an aluminum alloy and is formed in a block shape. The slide member 38 is movably supported by the guide shaft 34 at a bearing portion 42 provided at one end, and is provided at the other end. Bearing part 4
At 3, it is movably supported by the sub-guide shaft 36.

In this case, as shown in FIG. 8, a sleeve 42a is fitted to the bearing 42 at one end, and the guide shaft 34 is slidably inserted into the sleeve 42a. On the other hand, the bearing 43 on the other end side is formed with a concave groove 43a that opens toward the rear wall 21c of the base unit chassis 21 and sandwiches the sub guide shaft 36 from above and below. Are in sliding contact with the sub-guide shaft 36.

A leaf spring 44 as an elastic pressing member is mounted on the slide member 38 in the vicinity of the bearing 43 by a mounting screw 45. The leaf spring 44 has a function of pressing against the sub-guide shaft 36 and pressing the slide member 38 against the sub-guide shaft 36, and thereby, a play caused by a gap between the bearing portion 43 of the slide member 38 and the sub-guide shaft 36. The optical pickup device 25 is stably moved to prevent sticking.

The leaf spring 44 will be described in more detail. As shown in FIGS.
Are integrally formed with a base 44a fixed to the slide member 38 and a pressing piece 44b extending from the base 44a and slidingly contacting the sub-guide shaft 36. Base 4
4a is formed in a ring band that surrounds the slide member 38 as shown in FIGS. 9 and 10, a screw 45 attached to the end portion 44a ₁ and 44a ₂ of the ring band-like base portion 44a
The leaf spring 44 is fixed to the slide member 38 by tightening the plate spring 44.

[0038] Then are slidable contact so that its tip 44b ₁ pressing piece 44b integrally with extending the bent shape is pressed against the lower side of the sub-guide shaft 36 from the lower side of the base portion 44a, the pressing piece The slide member 38 has a structure in which the upper surface side of the concave groove 43a of the bearing portion 43 is pressed against the sub-guide shaft 36 by the elastic pressing force of the portion 44b to prevent rattling.

The leaf spring 44 is pressed against the sub-guide shaft 36, that is, the tip 44b of the pressing piece 44b.
₁ Yes formed by bending in an arc shape as shown in FIG. 9, the leaf spring 44 during movement of the for the optical pickup device 25 is adapted to be slid smoothly with respect to the sub-guide shaft 36 ing.

Next, a pickup feeding mechanism for moving the optical pickup device 25 along the guide shaft 34 and the sub guide shaft 36 will be described. As shown in FIG. 4, the pickup feed mechanism is adjacent to the guide shaft 34 and is parallel to the guide shaft 34.
Feed screw shaft 26 attached to the
And a feed motor 27 for rotating the motor 6 as a main component.

The feed screw shaft 26 has shaft portions 26 at both ends thereof.
a and 26b are rotatably supported by bearings 47a and 47b provided on the base unit chassis 21. In this case, the shaft portion 26a on one end side of the feed screw shaft 26 is rotatably supported through the bearing portion 47a, and the shaft portion 26b on the other end side is rotated by the bearing portion 47b in a state of being abutted against the wall of the base unit chassis 21. It is freely supported. As the material of the feed screw shaft 26, for example, stainless steel is suitably used.

A drive gear 49 that meshes with an output gear described later is fixed to one end of the feed screw shaft 26. An opening 50 for avoiding interference with the drive gear 49 is formed in the front wall 21b of the base unit chassis 21 corresponding to the drive gear 49.

A nut member 51 attached to the slide member 38 of the optical pickup device 25 is engaged with the thread portion of the feed screw shaft 26. The nut member 51 is fixed to a distal end of an elastic piece 53a extending from a support body 53 made of a leaf spring material attached to the slide member 38 by a fixing screw 52, and the feed screw shaft 26 is formed by the elasticity of the elastic piece 53a. It is engaged so that it is pressed against.

A feed motor 27 for rotating the feed screw shaft 26 is disposed above the feed screw shaft 26 and attached to the base unit chassis 21 as shown in FIG. An output gear 5 is provided on a rotation shaft 27a of the feed motor 27.
The drive gear 49 of the feed screw shaft 26 is meshed with the output gear 54, so that the rotation of the rotary shaft 27 a of the feed motor 27 is controlled by the output gear 54 and the drive gear 49. And the feed screw shaft 26 is driven to rotate.

When the feed screw shaft 26 is rotated by the feed motor 27 in this manner, the nut member 51 moves in the axial direction of the feed screw shaft 26, and the optical pickup device 25 integrally moves with the guide shaft 34 and the sub shaft. The optical disk 33 is moved in the radial direction along the guide shaft 36.

A rotary plate 55 is fixed to the rotary shaft 27a of the feed motor 27. A number of slits are radially formed on the rotary plate 55 at equal angular intervals in the circumferential direction, and a rotation detection sensor 56 is attached to the base unit chassis 21 corresponding to the rotary plate 55.

The rotation detecting sensor 56 has a notch groove into which a part of the rotating plate 55 is inserted, and a light emitting element and a light receiving element are provided on both sides of the notch groove of the rotation detecting sensor 56 so as to face each other. Have been. Then, the light emitted from the light emitting element is received by the light receiving element through the slit of the rotating plate 55 and the number of times light is shielded by the light shielding portion between the slits is measured, whereby the rotation angle of the rotary shaft 27a of the feed motor 27 and This is to detect the rotation speed.

The pickup feeding mechanism configured as described above is covered by a base unit sub-chassis 22 attached to the base unit chassis 21.
The base unit sub-chassis 22 serves as a part of the base unit chassis 21.
Is attached to the main body by a fixing screw 57,
It has a lower surface portion 22a that covers the pickup feed mechanism, and a front wall portion 22b and a side wall portion 22c that are formed continuously on the front side and the side surface of the lower surface portion 22a, and is attached to the base unit chassis 21. This prevents dust and the like from entering the pickup feed mechanism. The base unit sub-chassis 22 is formed of the same material as the base unit chassis 21.

The base unit sub-chassis 22
Also has a function of pressing the guide shaft 34 and the feed screw shaft 26 attached to the base unit chassis 21,
That is, the base unit sub-chassis 22 is attached to the base unit chassis 21 while the guide shaft 34 and the feed screw shaft 26 are supported by the bearings 35a, 35b and 47a, 47b of the base unit chassis 21 as shown in FIG. , The guide shaft 34 and the feed screw shaft 26 become bearing portions 35a, 35b and 47, respectively.
In this structure, the base unit sub-chassis 22 is used to hold the base unit sub-chassis 22 so that the base unit sub-chassis 22a does not fall off the base unit sub chassis 22. Further, an opening 58 is formed in the lower surface portion 22 a of the base unit sub-chassis 22 to avoid interference with the drive gear 49 of the feed screw shaft 26.

The base unit sub-chassis 2
As shown in FIGS. 3 and 5, a pressing piece 60 for pressing the tip of the shaft portion 26 a on one side of the feed screw shaft 26 to fix the feed screw shaft 26 in the axial direction is integrally formed with the feed screw shaft 26. Is provided. The pressing piece portion 60 is an elastic flexible piece formed by using a part of the side wall portion 22c of the base unit sub-chassis 22. When the base unit sub-chassis 22 is attached to the base unit chassis 21, this pressing piece portion 60 The one-sided portion 60 is pushed at the tip of the shaft portion 26a on one side of the feed screw shaft 26 to bend outward, and the elastic push-back force pushes the tip of the shaft portion 26a on one side of the feed screw shaft 26 in the axial direction. Therefore, the feed screw shaft 26 is connected to the shaft portion 26 on the other side.
b is pressed against the wall of the base unit chassis 21.

Thus, the feed screw shaft 26 is fixed in the axial direction, that is, the feed screw shaft 26 is fixed.
Can be securely attached without rattling in the axial direction, so that the optical pickup device 25 can perform an accurate feeding operation.

In the disk drive device 20 of the present embodiment having the above configuration, the optical disk 33 is
Recording or reproducing operation is performed. First, the optical disk 33 is mounted on the turntable 24. This work
This can be done as follows. For example, a plurality of positions on the outer peripheral edge of the optical disk 33 are gripped, and the center hole thereof is aligned with the fitting portion 24 a of the turntable 24. And
Lightly press the optical disk 33 to lock the three lock claws 24c.
Is retracted and passed through the center hole. Thus, the chucking of the optical disk 33 is performed by the three lock claws 24c having passed through the center hole riding on three positions on the edge of the center hole.

Next, by driving the spindle motor 23, the optical disk 33 is integrated with the turntable 24.
To rotate. At the same time, the feed motor 27 of the pickup feed mechanism is driven, and the feed screw shaft 26 is rotated.
When the feed screw shaft 26 is rotated in this manner, the nut member 51 moves in the axial direction of the feed screw shaft 26, and the optical pickup device 25 integrally moves with the guide shaft 34 and the sub-guide shaft 36. 33 in the radial direction.

In this case, the optical pickup device 25 is located at the innermost position in the radial direction of the optical disk 33 in the initial state, and operates so as to be moved outward therefrom in the radial direction. At this time, the information recording surface of the optical disk 33 is irradiated with laser light from the objective lens 40a of the optical head unit 40 of the optical pickup 39. As a result, at the time of reproduction, an information signal recorded in advance is read out by a laser beam applied to the information recording surface, and a reproduction operation is performed based on the information signal. At the time of recording, an information signal is written by a laser beam applied to the information recording surface, and a recording operation is performed.

In the recording or reproducing operation of the information signal, especially in the disk drive device 20 of the present embodiment, the slide member 38 of the optical pickup device 25 is always pressed against the sub guide shaft 36 by the leaf spring 44 as the elastic pressing member. As a result, the optical pickup device 25 can be stably moved without rattling with respect to the sub-guide shaft 36 even when vibration or impact is applied, and the laser beam irradiation on the optical disk can be stably maintained. The performance of signal recording or reproduction does not decrease.

FIGS. 11 to 16 show a second embodiment of the disk drive device according to the present invention. That is,
FIG. 11 is a plan view of a second embodiment of the disk drive device, FIG. 12 is a bottom view, FIG. 13 is a rear view showing a main part cut away, FIG. 14 is a sectional view taken along line YY of FIG. Figure 1
3 is an enlarged view of a main part, and FIG. 16 is an enlarged view of a main part of FIG. In the second embodiment, FIGS.
Parts corresponding to those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The disk drive device 20 according to the second embodiment has the same basic configuration as that of the above-described first embodiment, but the slide member 38 of the optical pickup device 25 is mounted on the sub-guide shaft 36 of the base unit chassis 21. The arrangement of the leaf spring 44 as an elastic pressing member provided to prevent the optical pickup device 25 from rattling in the portion supported by the first embodiment is opposite to that of the first embodiment.

That is, in the second embodiment, the leaf spring 44
As shown in FIGS. 15 and 16, the optical pickup device of the slide member 38 pressing piece portion 44b from above integral base 44a which is fixed to extend in bent shape at its distal end 44b ₁ sub guide shaft 36 The sliding member 38 is pressed by the elastic pressing force of the pressing piece 44b so that the lower surface side of the concave groove 43a of the bearing 43 is pressed against the sub-guide shaft 36. Sticking is prevented. A structure in which the leaf spring 44 is fixed to the slide member 38 by tightening with a mounting screw 45, and a pressing piece 4 of the leaf spring 44
Structure tip 44b ₁ of 4b contacts the sub guide shaft 36 is bent in an arc shape is similar to the first embodiment described above.

In the disk drive device according to the second embodiment, the rattling of the optical pickup 25 can be more reliably prevented structurally. The reason will be described below. That is, in the disk drive device 20 shown in the present embodiment, as is apparent from FIG.
4 and the feed screw shaft 26 on the side opposite to the sub guide shaft 36
The nut member 51 is engaged with the feed screw shaft 26 from the slide member 38 side of the optical pickup device 25 so as to be pressed by the elasticity of the elastic piece 53a.

In this configuration, since the engagement position of the nut member 51 with the feed screw shaft 26 is set below the guide shaft 34, when vibration or impact is applied in the lateral direction, that is, in the tracking direction, the nut The sliding member 3 is pushed back from the feed screw shaft 26 of the member 51.
Reference numeral 8 denotes a state where the lower surface of the concave groove 43a of the bearing portion 43 is pressed against the sub guide shaft 36 by rotating about the guide shaft 34 as a fulcrum. At this time, in the disk drive device of the present embodiment, the slide member 38 is pressed against the sub guide shaft 36 from the side opposed to the portion pressed against the sub guide shaft 36 (the lower surface side of the concave groove 43a of the bearing 43), that is, from the upper side. Since the leaf spring 44 is disposed so as to perform the pressing operation, the leaf spring 44 always and stably presses the slide member 38 against the sub guide shaft 36 without being pushed back. Rattling is more reliably prevented.

The disk drive device 20 shown in the first and second embodiments has the following effects in addition to the effects described above. That is, in the disk drive device 20, the leaf spring 4 serves as an elastic pressing member for preventing the optical pickup device 25 from rattling.
4 is used, and since this leaf spring is an inexpensive part, it can be implemented at low cost.

In this disk drive device 20,
The tip portion 44b ₁ of the contact portion or the pressing piece portion 44b is bent in an arc shape with respect to the sub-guide shaft 36 of the leaf spring 44 is an elastic pressing member, the optical pickup apparatus 2
At the time of the movement operation of 5, the leaf spring 44 is smoothly slid with respect to the sub guide shaft 36, and the movement operation of the optical pickup device 25 is performed more stably.

Further, in this disk drive device 20, the leaf spring 44, which is an elastic pressing member, is fixed to the slide member 38 by tightening with the mounting screw 45, so that the leaf spring 44 can be easily attached. It is more advantageous for low-cost implementation.

In the disk drive device 20 shown in the first and second embodiments, the leaf spring 4 is used to prevent the optical pickup device 25 from rattling.
The slide member 38 is always driven by the sub-guide shaft 3
6, the optical pickup device 25 is moved in a state where a load is applied to this portion, and if this operation is repeated for a long period of time, there is a problem that the slide member 38 is worn.

That is, in this configuration, the slide member 38
Is made of a die-cast product made of a magnesium alloy. On the other hand, an engineering plastic made of PPE (polyphenylene ether) is used as a material of the base unit chassis 21 on which the sub-guide shaft 36 is formed. For this reason, glass fibers are included. In this case, since the material of the slide member 38 is softer than the sub-guide shaft 36, when the moving operation of the optical pickup device 25 is repeated, the friction between the slide member 38 and the sub-guide shaft 36 causes the slide member 3 to move.
Wear will occur on the 8 side.

When the slide member 38 is worn as described above, the optical pickup device 25 is tilted with respect to the optical disk, so that the irradiation angle (skew) of the laser light on the optical disk is disturbed, and the recording or reproduction of information signals is not performed. Performance may be reduced.

A configuration for solving this problem is shown in FIGS. 17 to 22 as a third embodiment. That is, FIG.
FIG. 1 is a bottom view of the third embodiment of the disk drive device, and FIG.
8 is a rear view of the main part cut away, FIG. 19 is a longitudinal sectional view of the main part, FIG. 20 is an enlarged view of the main part of FIG. 18, and FIG.
FIG. 22 is a perspective view of a leaf spring used in the third embodiment. In this third embodiment,
1 to 10 and FIGS. 11 to 1 described above.
6, parts corresponding to those in the second embodiment are denoted by the same reference numerals,
The description is omitted.

The disk drive device 20 according to the third embodiment has the same basic structure as that of the above-described second embodiment. However, in order to prevent the optical pickup device 25 from rattling, the slide member 38 is provided with a leaf spring. In a portion pressed against the sub-guide shaft 36 by the force of 44, means for suppressing wear of the slide member 38 is provided.

As a means for suppressing the wear, particularly in this embodiment, a configuration utilizing a part of the leaf spring 44 is employed.
That is, as shown in FIG. 22, the leaf spring 44 used in this example has an extension 44c extending integrally from below the base 44a so as to face the pressing piece 44b, and the extension 44c is wound around the slide member. the distal end 44c ₁ has a structure which is interposed between the slide member 38 and the sub guide shaft 36 as shown in FIGS. 20 and 21 bent.

In the disk drive device 20 of the present embodiment thus configured, the slide member 38 is pressed against the sub-guide shaft 36 via the leaf spring 44 without contacting the sub-guide shaft 36 itself. Therefore, even if the moving operation of the optical pickup device 25 is repeated for a long time, the slide member 38 does not wear.

Here, stainless steel is suitably used as the material of the leaf spring 44, and this stainless steel is
The plate spring 44 hardly wears because it has good lubricity with respect to glass fibers contained in the plastic on the sixth side and has sufficient hardness itself.

Therefore, in the disk drive of this embodiment,
Even if this is used for a long time, the optical pickup device 25 does not tilt and the irradiation angle of the laser beam on the optical disk does not change, so that the information signal can be recorded or reproduced more stably and more reliable. It is possible to realize a highly reliable disk drive device.

In the case of the present embodiment, in particular, the slide member 38
Since a part of the leaf spring 44 is used as a means for suppressing the wear of the slide member 38, the number of parts is the same as that of the first and second embodiments, and therefore, the wear of the slide member 38 can be surely reduced at almost no cost. There is a feature that can be prevented.

The disk drive device 20 having the above-described structure, operation, and effect is, for example, shown in FIGS.
It can be used by attaching to an electronic device as shown in FIG. FIGS. 23, 24, and 25 show a digital video disk camera as a specific example of an electronic apparatus. The digital video disk camera 80 uses a recordable optical disk as an information recording medium, and has a function of a digital still camera and a function of a video tape recorder.

This digital video disk camera 80
Has a configuration as shown in FIG. In FIG. 25, 81 is a focus ring, 82 is a lens cover,
83 is a lens assembly, 84 is a lens barrel cover, 85 is a mounting ring, 86 is a front camera frame, 87 is an electronic view finder, 88 is a finder holder, 89 is a finder ring, 90 is a finder case, 91 is a battery holder, and 92 is a battery holder. Is a battery power supply, 93a to 93c are wiring boards, 94 is a base frame, 95 is a rear camera frame, 96 is a liquid crystal display device, and 97 is a disk mounting lid.

The lens assembly 83 has a lens holder 83a in which a plurality of combined lenses are stored, a solid-state image pickup device (CCD) 83b disposed on the opposite side of the lens holder 83a from the objective lens, and the like. . The objective lens side of the lens assembly 83 is covered with a lens cover 82, and a focus ring 81 is attached to the tip of the objective lens. A lens barrel cover 84 is attached to a lower portion of the lens assembly 83 on the side of the solid-state imaging device 83b. The lens barrel cover 84 is attached to the cylinder 86a of the front camera frame 86 by an attachment ring 85. An electronic viewfinder 87 is provided above the solid-state imaging device 83b.

The electronic view finder 87 is mounted on a finder holder 88, and a finder ring 89 is disposed behind the electronic view finder 87. The upper and lower sides of the electronic viewfinder 87 including the finder ring 89 are covered by an upper cover 89a and a lower cover 89b which are divided into two parts in the vertical direction. The entire viewfinder including the electronic viewfinder 87 is covered with a viewfinder case 90. This prevents extra light from entering the electronic viewfinder 87.

Further, behind the solid-state imaging device 83b, three wiring boards 93a to 93c are arranged so as to overlap in the front-back direction. Front two wiring boards 93a, 93
Reference numeral b denotes a circuit provided with a camera electronic circuit, and one rear wiring board 93c includes a drive electronic circuit. Thereafter, behind the wiring board 93c, the disk drive device 20 attached to the base frame 94 is provided.

The means for attaching the disk drive device 20 to the base frame 94 has a structure as shown in FIGS. 26 and 27. That is, the base frame 94 is formed of a sheet metal plate having a larger planar shape than the disk drive device 20. This base frame 9
A plurality of leg pieces 94a for attaching to the camera frame are provided on the peripheral edge of No. 4. Further, support pieces 94b for supporting the disk drive device 20 are provided at three places of the base frame 94. The three support pieces 94b are arranged substantially evenly so as to support the disk drive device 20 from three directions.
Has an insulator 9 formed of a rubber-like elastic body.
4c is attached.

In order to support the disk drive device 20 via such a support piece 94b, support arms 21f projecting sideways are provided at three places of the base unit chassis 21.
Is provided. An insulator 94c is mounted on each of the support arms 21f, and the disk drive device 20 is elastically supported by the base frame 94 by engaging with the support piece 94b in the mounted state.

The disk drive device 20 supported by the base frame 94 is mounted inside the rear camera frame 95. The rear camera frame 95 has a shape that overlaps the front camera frame 86 in the front-rear direction, and the camera body is configured by assembling the two camera frames 86 and 95 in an overlapping manner. The camera body includes the above-described cylindrical body 86a in which the lens assembly 83 and the like are stored, and a grip 86b formed continuously on one side of the cylindrical body 86a.

As shown in FIG. 24, a power switch 98a and a shutter button 98b are provided above the grip 86b. A switch cover 98c to which a focus switch or the like is attached is attached to a side surface of the cylindrical portion 86a opposite to the grip portion 86b. A large opening 95a is provided on the rear surface of the rear camera frame 95, and a surface of the disk drive device 20 on the turntable 24 side is largely exposed from the opening 95a. The opening 95a can be opened and closed by a disc mounting lid 97 connected to the rear camera frame 95 by a hinge. The disc mounting lid 97 has a display window 9.
7a is provided, and a liquid crystal display device 96 is mounted on the display window 97a. Locking and unlocking of the disc mounting lid 97 can be performed by an open / close switch 95b provided on a side surface of the rear camera frame 95.

A battery holder 91 is housed inside the grip 86b of the camera body. A battery cover is detachably attached to the front of the battery holder 91, and a battery power supply 92 is detachably attached to the battery holder 91. A terminal holder 91 a is detachably attached to the battery holder 91, and a battery power supply 92 is attached to and detached from the battery holder 91 via attachment and detachment of the terminal holder 91 a.

The digital video disk camera 80 having such a configuration can be used, for example, as follows. In this case, the operation of mounting / removing the optical disk, which is the information recording medium, is performed by opening the disk mounting cover 97 and opening the disk if necessary. That is, the disc mounting lid 97 is opened to open the opening 95a of the rear camera frame 95, and the optical disc is mounted on the turntable 24 of the disc drive device 20 which is exposed, or the optical disc previously mounted is removed. .

At this time, after mounting the optical disk in the disk drive device 20, the user can take a picture by closing the disc mounting cover 97, and can record video information and audio information by this photography. That is, by turning on the power switch 98a and then pressing the shutter button 98b, a continuous image can be transferred in the same manner as a general video camera, or a single image can be shot in the same manner as an ordinary camera, depending on the shooting mode. It can be performed.

In this embodiment, an example in which the disk drive device 20 is applied to the digital video disk camera 80 has been described, but the present invention can also be used for the following electronic devices. For example, CD player, DV
The present invention can be applied to a D player, a CD-ROM drive, a DVD drive, a CD-R drive, a CD-RW drive, and various other disk drives. In other words, the present invention can be applied not only to a disk recording / reproducing apparatus for both recording and reproduction but also to a disk recording apparatus or a disk reproducing apparatus capable of performing only one of recording and reproduction.

In the above embodiment, an example in which an optical disk is used as an information recording medium has been described. However, the present invention is applied to a magnetic disk such as a magneto-optical disk, a floppy (registered trademark) disk, and other various disk-shaped recording media. Of course, you can do that. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0088]

As described above, according to the disk drive device of the first aspect of the present invention, since the slide member is pressed against the sub-guide shaft by the elastic pressing member, the pickup is not subject to vibration or impact. Even if it is applied, it is moved stably without rattling, so that the recording or reproducing performance of the information signal is not reduced, and an effect that a disk drive device resistant to vibration and impact can be provided can be obtained. .

According to the disk drive device of the second aspect of the present invention, when vibration or impact is applied, the slide member rotates around the guide shaft as a fulcrum by pushing back the nut member from the feed screw shaft. Even when the slide member is pressed against the guide shaft, the elastic pressing member is disposed so as to press the slide member against the sub guide shaft from the side opposite to the portion pressed against the sub guide shaft. Since the member always and stably presses the slide member against the sub-guide shaft without being pushed back, there is obtained an effect that rattling of the pickup can be more reliably prevented.

Further, according to the disk drive device described in claim 3 of the present application, by using a leaf spring as the elastic pressing member, it is possible to obtain an effect that it can be implemented at low cost.

Further, according to the disk drive device of the fourth aspect of the present invention, the contact portion of the leaf spring, which is the elastic pressing member, with respect to the sub-guide shaft is bent in an arc shape, so that the leaf spring does not move when the pickup is moved. Since the pickup slides smoothly with respect to the sub-guide shaft, an effect that a more stable movement of the pickup is performed can be obtained.

Further, according to the disk drive device described in claim 5 of the present application, the leaf spring, which is an elastic pressing member, is fixed to the slide member by tightening with a screw, so that the leaf spring can be easily attached. Therefore, there is an effect that it is more advantageous for implementation at low cost.

Further, according to the disk drive device described in claim 6 of the present application, at a portion where the slide member is pressed against the sub-guide shaft, a part of the leaf spring is interposed between the slide member and the sub-guide shaft. With this structure, the wear of the slide member can be effectively suppressed, so that the pickup does not tilt, recording and reproducing can be performed more stably, and a more reliable disk drive device can be realized. There is.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of a disk drive device of the present invention.

FIG. 2 is a plan view of the disk drive device shown in FIG.

FIG. 3 is a bottom view of the disk drive device shown in FIG.

FIG. 4 is an explanatory view showing a main part of the disk drive device shown in FIG. 3 from which a base unit sub-chassis is removed from a bottom view.

5 is a sectional view of the disk drive device shown in FIG. 2, taken along line XX.

FIG. 6 is a rear view of the disk drive shown in FIG.

FIG. 7 is a left side view of the disk drive device shown in FIG.

FIG. 8 is a sectional view taken along line YY of the disk drive device shown in FIG. 2;

FIG. 9 is an enlarged view of a main part of the disk drive device shown in FIG. 6;

FIG. 10 is an enlarged view of a main part of the disk drive device shown in FIG.

FIG. 11 is a plan view showing a second embodiment of the disk drive device of the present invention.

FIG. 12 is a bottom view of the disk drive device shown in FIG.

FIG. 13 is a rear view of the disk drive device shown in FIG. 11 with a main part cut away.

FIG. 14 is a YY diagram of the disk drive device shown in FIG. 11;
It is a line sectional view.

15 is an enlarged view of a main part of the disk drive device shown in FIG.

16 is an enlarged view of a main part of the disk drive device shown in FIG.

FIG. 17 is a bottom view showing a third embodiment of the disk drive device of the present invention.

18 is a rear view of the disk drive device shown in FIG. 17 with a main part cut away.

19 is a longitudinal sectional view of a main part of the disk drive device shown in FIG.

20 is an enlarged view of a main part of the disk drive device shown in FIG.

21 is an enlarged view of a main part of the disk drive device shown in FIG.

FIG. 22 is a perspective view showing a leaf spring used in the third embodiment.

FIG. 23 is a side view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 24 is a plan view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 25 is an exploded perspective view showing an embodiment of a digital video disk camera using the disk drive device of the present invention.

FIG. 26 is a plan view showing a state where the disk drive device of the present invention is mounted on a base frame.

FIG. 27 is a front view showing a state where the disk drive device of the present invention is mounted on a base frame.

FIG. 28 is a plan view showing a conventional disk drive device.

FIG. 29 is a bottom view of the conventional disk drive device shown in FIG.

FIG. 30 is a rear view of the conventional disk drive device shown in FIG.

FIG. 31 is a sectional view taken along line YY of the conventional disk drive device shown in FIG. 28;

FIG. 32 is an enlarged view of a main part of the conventional disk drive device shown in FIG.

FIG. 33 is an enlarged view of a main part of the conventional disk drive device shown in FIG. 31;

[Explanation of symbols]

20 ‥‥ disk drive device, 21 ‥‥ base unit chassis, 25 ‥‥ optical pickup device, 26 ‥‥
Feed screw shaft, 27 ° feed motor, 33 ° optical disk (disk-shaped recording medium), 34 ° guide shaft, 36 °
{Sub guide shaft, 38} Slide member, 39} Optical pickup, 42} Bearing part, 43} Bearing part, 43
a ‥‥ concave groove, 44 ‥‥ leaf spring (elastic pressing member), 44b
{Pressing piece, 44b ₁ } Tip, 44c Extension, 44c ₁ {Tip, 45} Mounting screw, 51
‥‥ Nut member,

Claims (6)

[Claims] 1. A slide member on which a pickup for performing recording or reproduction on a disk-shaped recording medium is mounted, and a guide inserted through the slide member and moving the slide member in a radial direction of the disk-shaped recording medium. A sub-guide shaft that guides the slide member so that the slide member slides in contact with the slide member and moves the slide member together with the guide shaft in the radial direction of the disk-shaped recording medium; And a feed mechanism for moving the slide member along the guide shaft. An elastic pressing member that presses against the sub guide shaft is attached to the slide member, and the elastic member presses the slide member to the sub guide. A disk drive device having a structure for pressing against a shaft. 2. The feed mechanism, comprising: a feed screw shaft provided in parallel with the guide shaft and driven to rotate by a motor; and a nut member engaged with the slide member to be pressed against the feed screw shaft. In the disk drive device, the slide member is rotated around the guide shaft as a fulcrum by pushing back the nut member from the feed screw shaft, and the sub guide is rotated from the side facing the portion pressed against the sub guide shaft. 2. The disk drive device according to claim 1, wherein the elastic pressing member is disposed so as to be pressed against a shaft. 3. The disk drive device according to claim 1, wherein the elastic pressing member is a leaf spring. 4. The disk drive device according to claim 3, wherein a pressure contact portion of the leaf spring with respect to the sub guide shaft is bent in an arc shape. 5. The disk drive device according to claim 3, wherein the leaf spring is fixed to the slide member by fastening with a screw. 6. The apparatus according to claim 3, wherein a part of said leaf spring is interposed between said slide member and said sub-guide shaft at a portion where said slide member is pressed against said sub-guide shaft. The disk drive device according to the above.