JPH08129824A - Optical disk recording and/or reproducing device - Google Patents

Abstract

PURPOSE: To enhance the stability by suppressing resonance on a bearing part due to a vibration of a spindle motor and suppressing resonance with the surface of an optical disk due to reaction force to a vibration of an actuator of an objective lens as well. CONSTITUTION: The device possesses a movable block having the spindle motor for rotationally driving the optical disk, the bearing part for supporting the block and moving it parallel along a guide shaft and a driving mechanism for moving the block to the disk. The bearing part is specified as a metal bearing 301 filled with a damper material 303 via a leaf spring material 302 in a part to be in contact with the surface of the guide shaft 274. A vibration generated by the motor is absorbed by the damper material 303 of the bearing part, and also the objective lens is driven in the horizontal or vertical direction to the disk surface by a linear motor, and when reaction force to vibration generated at this time is transmitted via a chassis, the movable block and the motor to the disk, this is absorbed in the same manner to be suppressed not to bring about the oscillation state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to optical disk recording and / or recording.
Or, it relates to a reproducing device.

[0002]

2. Description of the Related Art For example, in a magneto-optical disk recording / reproducing apparatus, Japanese Patent Laid-Open No. 5-159533 (Reference 1) discloses the following structure in order to prevent resonance of an actuator from being transmitted to the disk.

In the device described in the above publication, a movable block is guided by a guide shaft with respect to a chassis to move up and down, and a spindle motor for rotating a magneto-optical disk is provided in the movable block. In order to prevent the resonance generated by the actuator from being transmitted from the chassis to the magneto-optical disk through the spindle motor, as shown in FIG. 8, three locations that are equidistant from the center of the movable block (the figure shows a cross section taken at one of these locations). A slide bearing is press-fitted in the vertical direction in (shown), and a guide shaft is inserted in each bearing and supported. Then, in order to absorb the resonance of the chassis transmitted from the guide shaft to the movable block, the balls provided on the slide bearing are brought into contact with the guide shaft via the coil spring, and the resonance is absorbed during this period.

Japanese Unexamined Patent Publication No. 6-28827 (reference 2)
Describes a technique related to prevention of vibration when the spindle motor rotates (note that the symbols in the following brackets [] represent the symbols in Document 2). In the device described in the publication, the vertical movement mechanism [6] for moving the spindle motor upward when the loading of the disc [102] is completed is locked by the lock mechanisms [6b, 2].
58] is added to prevent vibration when the spindle motor rotates. The outline is as disclosed in FIG. 2 of the same publication, in which the elevation block [6] is provided with a convex portion [6b] and is disengaged from the convex portion [6b] so that the elevation block [6]. When the lifting block [6] and the spindle motor [3] provided for the lifting block [6] are raised to reach a predetermined fixed position by using a leaf spring [258] that locks and unlocks at the loading position of the convex portion [6b]. The upper portion of the leaf spring [258] is fitted into the upper part of the leaf spring [258], thereby preventing a force that moves the lifting block [6] toward the chassis [2] side.

Further, a pin [257] which rotates with the rotation of the lifting motor [11] is used as a releasing means for the engagement state, and the rotating pin [257] causes the leaf spring [2].
The plate spring [258] is retracted so that the upper part of the [58] is separated from the convex portion [6b] of the elevating block [6], whereby the elevating block [6] is lowered (unloaded). According to the above configuration, the spindle motor [3]
Spindle motor [3] in the loading state in which the disk table [4] is fitted to the disk [102].
Is locked at the specified height.

[0006]

The device disclosed in Document 1 has the following problems. The vibration generated by the eccentricity of the used disk and the imbalance of the rotor of the rotating spindle motor resonates at 1 kHz or less due to the coil spring having low rigidity. This is because the focus control frequency band is assumed to be from 0 to 10 kHz, and the frequency band in which mechanical resonance occurs and which causes a problem is 1/10 or less, that is, 1 kHz or less.
Under these conditions, the preload mechanism of the ball and spring as the structure of the thrust bearing increases the compressive force of the spring, so that the ball rotates when the elevating block moves up and down on the guide shaft axis. At this time, the ball is caught on the end of the spring and becomes a scratch. As a result, the guide shaft axis is indented. Therefore, it is difficult to move smoothly. In addition, the number of assembling steps is large, the number of parts is large, and the processing is complicated, so that the structure is expensive.

In the technique described in Reference 2, the leaf spring [258] is removed from the locked position (that is, retracted to the unlocked position) at the time of ejection (in the case of unloading). 6], the leaf spring [258] is removed from the convex portion [6b], and then the elevating block is lowered. Therefore, there is a drawback that the ejection time becomes long. Even if the movable block is pressed against the guide shaft and locked, the vibration reaction of the spindle motor and the objective lens during focus control is
Since the tracking operation to the disk is as high as 3 to 5 kHz,
It propagates from the chassis to the spindle motor of the movable block, and the objective lens cannot follow the optical disc.

An object of the present invention is to provide a device having a mechanism in which a portion having a spindle motor for rotating and driving an optical disc is used as a movable block and moves the movable block with respect to the disc, resonance or the like due to vibration of the rotating spindle motor is appropriate. Provided is an optical disc recording and / or reproducing apparatus capable of suppressing the resonance and suppressing the resonance even if there is resonance with the optical disc surface due to a vibration reaction force of an actuator of an objective lens and improving stability. It is to be.

[0009]

An optical disk recording and / or reproducing apparatus according to the present invention comprises a movable block having a spindle motor for rotationally driving the optical disk, a movable block supported by the movable block, and a parallel movement along a guide axis. An optical disk recording and / or reproducing apparatus comprising a bearing unit for driving the movable block and a drive mechanism for moving the movable block with respect to the disk, wherein a damper material is provided in a portion in contact with a guide shaft surface via a leaf spring material. It is characterized in that it is provided with a bearing portion having a structure filled with.

[0010]

According to the present invention, the block having the spindle motor for rotating the optical disk is a movable block, and the driving mechanism for moving the movable block with respect to the disk is provided to record and / or reproduce the information. In the above, the bearing part that supports the movable block and translates along the guide shaft is a bearing part in which a damper material is filled in a part in contact with the guide shaft surface through a leaf spring material. In the present invention,
Therefore, the vibration generated by the rotating spindle motor is absorbed by the damper material of the bearing portion, and even if the objective lens is driven in the horizontal or vertical direction with respect to the optical disc surface by the linear motor or the like, the vibration generated at this time is generated. Even when the reaction force is transmitted to the optical disc through the movable block and the spindle motor after passing through the chassis, it can be absorbed by the bearing portion in the same manner, and the oscillation state can be suppressed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an optical disk recording / reproducing apparatus according to an embodiment of the present invention. In the figure, 201 indicates a base (main body).
A plurality of upright guide shafts 274 are installed on the base 201.
A movable block 273 movably supported by (in the figure, one of them is shown in the left half section).
Is provided. Each guide shaft 274 has a base 27
4A is attached to the base 201.

In the peripheral portion of the movable block 273, a stepped hole portion for the bearing portion 300 is provided on the base 201 side at a position equidistant from the center portion of the movable block 273 (indicated by the dashed line in the figure). A plurality of guide shafts 274 are formed in accordance with the guide shafts 274. For example, as shown in FIG.
A bearing composed of a leaf spring and a metal bearing, whose configuration is illustrated in FIG. The details will be described later.

As shown in FIG. 1, the bearing portion 300 is arranged above and below the upper surface side of the movable block 273 and the lower step portion portion in the stepped hole portion. A spacer 310 is interposed between the upper and lower bearing portions 300. The movable blocks 273 are the movable blocks 273.
The base 201 is attached to the bearing portion 300 and the spacer 310 on the side.
By inserting the respective corresponding guide shafts 274 on the side, it is movably supported along the guide shafts 274.

A spindle motor 204, which serves as a mechanism for rotationally driving the magneto-optical disc 242 in the disc cartridge 251, is supported on the lower side of the center of the movable block 273. Spindle motor 204
Are fixed to the movable block 273 with screws or the like not shown. Spindle shaft 2 of this spindle motor 204
A tip portion of 88 protrudes from the upper surface of the movable block 273, and the spindle cup 288 is attached to the spindle shaft 288.
75 is attached. In addition, the spindle motor 2
04 is an electromagnet 27 whose energization is controlled on its upper surface.
1 is attached. This electromagnet 271 is a permanent magnet 272 attached to the lower surface side of the spindle cup 275.
So that it does not come into contact with and wear and break.
Its surface is coated with plastic.

Further, on the upper surface of the movable block 273,
Positioning pins 276 for positioning the height of the disk cartridge 251 when chucking the magneto-optical disk 242 are formed. A plurality of cartridge positioning pins 276 are provided so as to surround the spindle cup 275. When the movable block 273 moves up, the positioning pins 276 come into contact with the cartridge positioning recesses formed on the lower surface of the cartridge 251. FIG.
In this state, the movable block 273 is in the raised position, the cartridge 251 is positioned, and the magneto-optical disk 24
The state where the chucking 2 is performed is illustrated.

The drive mechanism for raising and lowering the movable block 273 comprises a motor 280, a gear 279 for reducing the rotation of the motor 280, and a rack member 278 which moves up and down by meshing with the gear 279. Motor 280
The rotation of the movable block 273 is transmitted by these.
It becomes the driving force for the vertical movement of. The rack member 278 is fixed to the side surface of the movable block 273. Gear 279
Is fixed to the shaft of the lifting motor 280. In this way, the rack member 278 is provided on the movable block 273 side, and the rack member 278 is driven by the motor 280.
It is configured to be the driven side of 79. Further, as shown, the base 201 and the guide shaft 2
A compression coil spring 281 is interposed between the movable block 273 and the stepped portion in the stepped hole of the movable block 273, and the action of the compression spring 281 causes the gear 279 and the rack member 278 to mesh with each other. It is pressed in the direction of urging the 273 side upward. When the lifting motor 280 is driven by the driving mechanism as described above, the movable block 27
3 (and thus the spindle motor 204) can be moved up and down.

Further, as shown in the drawing, the spindle motor 2
A reflecting member 282 is attached to the lower surface of 04 by adhesion. The reflecting member 282 can be configured, for example, by coating glass with a metal thin film and having a wedge-shaped reflecting surface for incident light. A photo reflector 283 is attached to the reflecting member 282 at the facing portion on the base 201 side facing the reflecting member 282 by adhesion. This photo reflector 28
As the element 3, for example, an LED as a light emitting element and a light receiving element including a photodetector divided into two can be integrated.

The disc hub 277 attached to the central portion of the magneto-optical disc 242 in the cartridge 251 by adhesion or the like is made of a magnetic material. This disc hub 27
7 is a spindle cup 275 of the magneto-optical disk 242.
The yoke 28 inside the spindle cup 275 when placed on top
4 and the permanent magnet 285, the magnetic circuit is centered by the attraction force of the magnetic circuit, and by this, the magneto-optical disk 24
2 is clamped on the turntable surface of the spindle cup 275. Further, in this example, the spindle motor 20
It is possible to independently drive the spindle cup 275 having a movable block 273 that supports 4 and a table for mounting the disk 242. For clamping of the magneto-optical disk, the spindle 275 side of the disk cartridge 251 is positioned by the cartridge positioning pin 276, the position of the movable block is detected and confirmed by the photo reflector 283, and then the electromagnet 271 is energized to set the electromagnet 271 and the permanent magnet. The repulsive force of 272 is made larger than the biasing force of the compression coil spring 287 to raise the spindle cup,
By attracting the disk 277 with the permanent magnet 285 in the spindle cup 275, the magneto-optical disk can be accurately clamped.

However, in reality, the position where the cartridge positioning pin 276 abuts on the disk cartridge 251 is recognized in advance, and the photo reflector 283 indicates that the position of the cartridge positioning pin 276 has approached the recognized position. It detects and energizes the electromagnet. That is, the spindle cup 27
No. 5 is fitted to the spindle shaft 288 with a key 289 inserted to prevent rotation, so that the spindle cup 275 rotates integrally with the spindle shaft 288, and Spindle cup 2
75 can move vertically with respect to the spindle shaft 288. The permanent magnet 272 attached to the lower surface of the spindle cup 275 and the electromagnet 271 fixed to the upper surface of the spindle motor 204 are vertically driven separately from the above-described movable block lifting drive mechanism with respect to the spindle cup 275 having such a configuration. Configure the mechanism.

Further, as shown in the figure, the periphery of the central portion of the spindle cup 275 is concave, and the stopper 286 fixed to the bottom of the concave portion and the tip end side of the spindle shaft 288 by a screw or the like. A compression coil spring 287 is interposed between and. This compression coil spring 2
87 allows the spindle cup 275 to move to the spindle shaft 2
It is biased downward with respect to 88.

In this example, the magneto-optical disk 2 as described above is used.
The movable block 273 provided with the spindle motor 204 that rotationally drives the motor 42, and a drive mechanism such as a lift motor 280 for the movable block 273 are mounted and arranged adjacent to a portion on the base 201 adjacent to the arranged portion. An optical pickup device including an objective lens driving device section and the like is arranged at a side position. The optical pickup device is a spindle motor 2
A magneto-optical disk 242 mounted and mounted on the turntable 04 is irradiated with a light beam for writing and reading information signals, and has a carriage equipped with optical parts such as an objective lens. Magneto-optical disk 24
It has a carriage driving unit such as a linear motor which is driven so as to move in two radial directions (see FIG. 5 for an example of such an optical pickup device portion on the base).

FIG. 2 shows an example of the structure of the bearing portion 300. In the present example, the bearing portion 300 includes the bearing 3 as shown.
01, a leaf spring 302, and a damper material 303.
Such a bearing unit 300 is attached to the movable block 273 of FIG.
Can be used for two upper and lower bearings for each guide shaft 274.

The bearing 301 has, for example, a circular outer diameter,
In addition, the shape (inner diameter) of the inner hole 301 ′ that penetrates is a substantially fan-shaped copper-based oil-impregnated bearing material (or an inner diameter) that forms 45 ° or 60 ° with respect to the center line as shown in FIG. , A Teflon-based plastic material may be used), and a slot portion (slot groove) 301a is formed in a part of the metal bearing as illustrated. And
As shown in FIGS. (A) and (B), a leaf spring 302 is interposed in the slotted portion 301a, and a damper material 303 made of a rubber material such as silicon rubber is filled in a portion behind the leaf spring 302. It is configured to be fixed. Further, the depth D (axial depth) of the slotted portion 301a is, as shown in FIG. (A), the axial direction of the bearing 301 (vertical direction in FIG. 1).
Above, here, for example, it is set so as to reach near the other end side.

The guide shaft 274 on the side of the base 201 through which the inner hole 301 'of the bearing 301 is inserted has a circular cross section. In this example, this guide shaft 274 is formed as shown in FIG.
The bearing portion 300 is brought into contact with the bearing portion 300 side. That is, the guide shaft 2
The reference numeral 74 designates an inner hole 301 ′ of the bearing 301 having a substantially fan-shaped cross section.
Are in line contact with the two surfaces of the opposing flat surface portion of, and the other surface is in line contact with the leaf spring 302 attached to the slotted portion 301a while being pressed by the leaf spring 302. The metal bearing 301 slides and moves perpendicularly to the paper surface. Therefore, the movable block 273 of FIG.
00, it moves up and down along the guide shaft 274 during the up-and-down driving.

Next, the operation of the apparatus of this embodiment will be described. The apparatus is provided with a cartridge holder (not shown) into which the cartridge 251 is inserted. When the cartridge 251 is inserted to a predetermined insertion completion position, this is detected by a detection device (not shown), and the detection is performed. A signal is sent to the control device (CPU), and the control device drives the lifting motor 280 based on this.

A gear 279 is driven by driving the lifting motor 280.
The movable block 273 moves up from the initial position (lower position) via the rack 278. When the movable block 273 moves up and approaches the cartridge 251, the cartridge 251 and the positioning pin 276 are brought into contact with each other, the positioning is detected, and then the spindle cup 275 is moved up, whereby the magneto-optical disk 242 is moved to the spindle cup 275. Make sure to put it on. Therefore, the output of the photo reflector 283 is used. Movable block 2
When 73 rises, the light beam emitted from the LED of the photo reflector 283 is reflected by the reflecting member 282, and when the reflected light is received by the photodetector divided into two parts of the photo reflector 283, on the surface of the light receiving element. Since the light beam is shifted by, the control device detects the position of the movable block 273 by the difference output of the photodetector divided into two.

In this way, the photo reflector 283 is
After positioning the disk cartridge 251 with the positioning pin 276 at the raised position of the movable block 273 based on the output of the above, the control device controls to energize the coil of the electromagnet 271. Therefore, when the electromagnet 271 is energized, the spindle cup 275 itself further rises along the spindle shaft 288 due to the repulsive force between the electromagnet 271 and the permanent magnet 272 attached to the lower surface of the spindle cup 275. Magneto-optical disk (hereinafter referred to as disk) 242 on the upper surface
Disc hub 277 is mounted. The clamp of the disc 242 is thus the disc hub 2 of the disc 242.
This is performed by raising the spindle cup 275 with respect to 77 and placing it on the turntable surface of the clamping permanent magnet 285 by the attractive force (FIG. 1).

According to this, the position of the cartridge positioning pin 276 is detected by the photo reflector 283, and then the disc 242 is clamped by the spindle cup 275 so that the cartridge 251 is locked accurately without being overloaded. Since the disc is clamped to the disc, it is possible to prevent the occurrence of scratches on the disc surface due to the contact between the cartridge 251 and the disc 242.

After the disk 242 is placed as described above, the spindle motor 204 is driven, whereby the disk 242 is rotationally driven together with the spindle cup 275, and information recording or reproduction is performed in such a state. . Here, in this case, in the present embodiment, resonance or the like due to vibration of the rotating spindle motor 204 can be appropriately suppressed.

As shown in FIG. 2, the spindle motor 2
Guide shafts 274 of the movable block 273 supporting 04.
The bearing portion 300 has a structure of a metal bearing 301 in which a part in contact with the surface of the guide shaft 273 is filled with a damper material 303 via a leaf spring material 302. Therefore, the vibration generated by the rotating spindle motor 204 is transmitted to the bearing unit 300.
It can be absorbed by the damper material 303. And again
The objective lens of the optical pickup is driven in a horizontal or vertical direction with respect to the disk surface by a linear motor, and the vibration reaction force generated at this time passes through the base 201 which is the chassis, and then the movable block 273 and the spindle motor 20.
Even when it is transmitted to the disk 242 via the magnetic field No. 4, it can be similarly absorbed by the bearing portion 300 and can be suppressed so that the oscillation state does not occur. Therefore, the resonance of the bearing portion 300 due to the vibration of the rotating spindle motor is suppressed, and the resonance with the disk 242 surface due to the vibration reaction force of the actuator of the objective lens is also suppressed, so that the stability is significantly improved. Is something that can be done.

Ejection is performed as follows in response to an eject instruction from the control device. That is, when ejecting, the coil of the electromagnet 271 is turned off.
Then, due to the restoring force of the compression coil spring 287, the spindle cup 275 first descends along the spindle shaft 288, whereby the spindle cup 275 is separated from the bub 277 of the disc 242. Then, at the same time or immediately after the motor 280 is energized and rotated, the movable block 273 is lowered, whereby the apparatus returns to the state before the above-mentioned loading. In this example, the eject can be performed in this manner.

FIG. 3 shows another example applicable to the structure of the bearing portion 300. In this example, the metal bearing 301 has a circular outer diameter, and the inner hole 301 '(inner diameter) has a substantially circular shape (e) eccentric to the central axis O1 of the outer diameter downward in the figure. A copper-based oil-impregnated bearing having a circular shape of the central axis O2). In accordance with the configuration of FIG. 2, a wide slotted portion (slotted groove) 301b is formed in such a bearing 301, and as shown in FIG.
The leaf springs 302, 302 are arranged. Then, a damper member 303 made of, for example, a silicon rubber based rubber material is interposed between these two leaf springs 302, 302 so as to have a fixed structure.

In the case of this example, the guide shaft 274 is brought into line contact at one point on the inner hole surface of the circular cross section of the oil-impregnated bearing 301, and at the other one point, the line contact is made while being pressed by the leaf spring 302. It is what makes me. You may use the bearing part 300 of a structure like this example, About an effect,
The same thing as the case where the bearing part 300 of the structure according to FIG. 2 is used is obtained.

FIG. 4 shows another example of the configuration. In this example, the metal bearing 301 has widths L1 and L as shown in the drawing.
Three slot grooves (slots) 301c of 2 and L3,
301d and 301e are provided. Of these three slot grooves, the slot groove 301d (width L2) and the slot groove 3
As shown in the figure, 01e (width L3) is formed on the bearing 301 in such a relationship that each of them makes a direction of, for example, 45 ° with respect to the center line in the figure, and thus forms an angle of 90 ° with each other. The slot groove 301c (width L1) is formed at the intersection of the slot grooves 301d and 301e as shown in the figure. Note that the depth of the slot groove is the same as that in the case of FIG. 2A, for example. Then, along the slot grooves 301d and 301e having widths L2 and L3 forming an angle of 90 ° with each other, the inner hole 3 of the bearing 301 is formed.
Leaf spring 30 bent at 90 ° so as to face the 01 ′ part
2 are arranged as shown in the drawing, and each slot groove 301 behind the leaf spring 302 is disposed through the leaf spring 302.
Damper material 30 so as to cover the portions c, 301d, and 301e
3 is filled.

Further, the guide shaft 274 in the bearing inner hole has two points (two positions) with the surface side of the leaf spring 302 bent by 90 °.
In addition, the inner hole surface of the metal bearing 301 comes into contact (line contact) with each other at one point (one place), and moves in the direction perpendicular to the paper surface.

In the case of this example of FIG. 4, the structure is slightly complicated as compared with the examples of FIGS. 2 and 3, but the three slot grooves having the above-mentioned arrangement and configuration as the damper material filling portion are provided. Thirty
1c, 301d, and 301e can be set. Therefore, the amount of the damper material 302 can be increased, and since the amount of the damper material 302 is large, the vibration absorption is high, and there are remarkable effects in suppressing the resonance and improving the stability. You may implement using such a structure.

Next, another embodiment (second embodiment) will be described. The present embodiment is an example of application to a guide type device as described in JP-A-6-111447 (reference 3). Here, the outline of the structure described in the publication will be supplementarily described with reference to FIG.
It is as follows. In this case, as shown in FIG.
A structure is used in which a spring member 70 formed by bending a thin metal plate having a spring property is used as a means for pushing up an elevating plate (not shown) to which a spindle motor is attached at an ascending position.

The spring member 70 has a mounting portion 71 having a substantially L-shaped cross section by a rising piece 71a and a base end piece 71b, and the rising piece 71a serves as a guide and is a side wall surface of the cam 75. It is fixed by being caulked to 75a with rivets or the like. The tip end side of the base end piece 71b of the spring member 70 is connected to a vertical portion extending in the ascending direction of the spindle motor, and extends from the tip end side of the vertical portion to the parallel portion 76b side following the inclined portion 76a of the cam 75. And a curved portion 72 formed so as to draw a gentle arc. On the other hand, the lift plate to which the spindle motor is attached is provided with a pin 80 that constitutes a first lift unit that drives the spindle motor to move up and down. The pin 80 is shown by a broken line in FIG. 7, but as shown in the figure, the inclined portion 76 a and the parallel portion 76 of the cam 75 are shown.
It is inserted into b as a guide, and is provided so as to project on both sides of the elevating plate. Therefore, the mechanism shown in FIG.
It is located on both sides of the lift plate.

The curved portion 72 of the spring member 70, in the unloading state, reaches the parallel portion 76b connected to the inclined portion 76a when the pin 80 on the lifting plate side climbs up the inclined portion 76a of the cam 75 and reaches the parallel portion 76b. The pin 80 is contacted with the pin 80 for the first time, and the tip end side of the curved portion 72 is slightly projected from the parallel portion 76b. Therefore, when the pin 80 reaches the parallel portion 76b and rolls inward along the parallel portion 76b, the pin 80 comes into contact with the bending portion 72 and bends the bending portion 72 in the direction in which the curvature becomes smaller. . At this time, the lift plate supporting the pin 80 is pressed against the spindle height positioning member (not shown) by the elastic force of the bending portion 72 in the direction of the arrow in the drawing. As a result, the spindle motor is reliably positioned at its raised position, and its state is stably maintained.

The present embodiment is applied to the case where the elevating plate of the spindle motor is provided with a pin and the pin is pushed up by the curved portion of the leaf spring member at the elevated position. That is, it is intended to effectively absorb the vibration. The main part of the present embodiment will be described below. FIG. 5 shows an example of the configuration. In the figure, 120 corresponds to such a pin on the lifting plate side, and 100 is the present embodiment. 2 shows a leaf spring according to. Incidentally, 130 corresponds to the above cam member. In this embodiment, as shown in the figure, the damper material 105 is joined to the back surface of the curved portion 105 of the leaf spring 100 for pushing the pin 120 upward. According to the present embodiment, with this configuration, the vibration generated by the rotation of the spindle motor spreads to the entire lifting plate, and the pin 1
20 is transmitted to the leaf spring 100, and the leaf spring 10
The vibration on 0 is absorbed by the damper material 105 on the back surface. In this way, it is possible to obtain the effect of suppressing the resonance due to the vibration of the rotating spindle motor.

As described above, this embodiment can be expressed as follows. A movable block having a spindle motor for rotating the optical disc, a support shaft attached to the movable block and supporting the movable block, and a cam engaging with the support shaft and restricting a moving direction of the movable block. An optical disk recording and / or reproducing apparatus comprising: an elastic member for pressing the support shaft against the cam surface; and a drive mechanism for moving the movable block with respect to the optical disk, wherein the support of the elastic member is provided. The optical disk recording and / or reproducing apparatus is characterized in that a damper material is fixed near a portion that presses the shaft.

Next, still another embodiment (third embodiment) will be described with reference to FIGS. In this embodiment,
FIG. 5 shows a damper material 105 added to the back surface of the leaf spring 100.
As shown in combination with the configuration example according to (1), a mechanism for raising and lowering the spindle motor (including a configuration including the raising and lowering plate according to the second embodiment), a loading mechanism portion for raising and lowering the positioning pin of the cartridge, and an optical component such as an objective lens are provided. A slit 202 is formed on a base (main body) 201 near a boundary between a linear motor moving in the radial direction of the disc 242 and a carriage driving unit such as a screw, and a damper material 150 such as rubber is interposed therein. To do.

Here, regarding the shape of the slot groove 202 formed in the vicinity of the boundary, as seen from the upper surface of the main body,
Any shape such as a substantially S-shape, L-shape, I-shape, and E-shape may be used. The groove cross-sectional shape of the slot groove 202 is shown in FIG.
As shown in (b), a substantially I-shape or an inverted T-shape is easy to make in processing.

By doing so, the objective lens 2
It is possible to suppress both the vibration generated from the carriage driving unit and the vibration generated from the spindle motor in accordance with the driving of the carriage 40 having 0 and the tilt mirror 30 and the like.

In the technique disclosed in Japanese Patent Laid-Open No. 4-82074 (Reference 4), a spindle motor is mounted on the first base plate of the main body, and a carriage side is mounted on the second base plate. The base plate of 2 is connected via an elastic member.
When the base plates are coupled by the elastic member, the vibration generated by the driving of the objective lens is absorbed, but the vibration of the spindle motor is overlapped with the bending of the chassis, and the resonance remains. On the other hand, in the present embodiment, the slot groove 202 which does not penetrate in the vicinity of the boundary between the carriage portion and the spindle motor on the main body with the I-shaped or inverted T-shaped cross-sectional shape.
(Slit groove) is formed, and the damper material 150 (elastic member) is interposed therein. In this way, the vibration is blocked between the slits for both vibrations (reaction force),
The damper material 150 absorbs it. That is, in this embodiment, the lower part of the main body is connected so that the passing vibration is absorbed by the damper material 150.

The elastic member used as the damper material 150 can be selected from the following viewpoints. Rubber materials such as butyl rubber and natural rubber have poor temperature characteristics and slow responsiveness. Therefore, make it a thermoplastic material and add foaming material if necessary.
If a material having the same linear expansion coefficient as that of 1 (main body) is selected, the action and effect will be remarkable from the viewpoint of temperature characteristics.

The present embodiment is also effective in the following points. That is, in particular, in a thin disk drive device, since the parts of each unit are small and complicated, a damper material may be interposed in each part, but if so, it tends to be more expensive. is there. In this respect, as described above, it is easy to form the groove 202 on the main body and interpose the damper material 150,
Therefore, there is a great effect in improving the cost reduction.

As described above, this embodiment can be expressed as follows. In the radial direction of the optical disc, a loading mechanism section for moving a spindle motor for rotating the optical disc in a direction perpendicular to the optical disc surface and a carriage carrying an objective lens for condensing light from a light source onto the optical disc are arranged in a radial direction of the optical disc. An optical disk recording and / or reproducing apparatus comprising: a carriage drive unit to be moved; and a base on which the loading mechanism unit and the carriage drive unit are arranged, wherein the loading mechanism unit and the carriage drive unit in the base are provided. An optical disk recording and / or reproducing apparatus is characterized in that a groove is formed near a boundary and a damper material is interposed in the groove.

Further, this embodiment can be carried out as an improved one as follows. Some of the preferable modified examples will be described below. The main body of the disk drive device according to the present embodiment is, for example, a spindle motor 2
A motor 280 for moving up and down 04, a drive portion thereof and a drive portion including a guide shaft 274 (loading mechanism portion)
A chassis plate (# 1) that supports the drive unit, a drive device such as a VCM that moves the optical pickup in the disc radial direction, and a chassis plate (#
2) and can be configured.

In the case of this embodiment, in the vicinity of these boundaries in the integrated chassis, an inverted T-shape or an inverted T-shape is formed according to the method using the slot groove 202 and the damper material 150 described in the description of FIGS. 5 and 6. The I-shaped groove is provided. In such a case, for example, a slit groove having a wide inverted T-shaped cross section or a wide I-shaped cross section is formed, and an elastic material is interposed therein. Alternatively, as another example, a narrow inverted T-shaped cross-sectional shape or a narrow width may be used to surround the area side around the chassis plate (# 1) on the spindle motor side. It is preferable that a slit groove having a narrow I-shaped cross section is formed in the chassis, and an elastic material is interposed therein. Alternatively, a combination of these may be used, and particularly in the case of the combination, regarding the formation of the slit groove,
Preferably, the above-described slit groove (wide reverse T-shaped or I-shaped groove) having a wide width at the boundary portion according to the above example
And the ends of the above-mentioned groove type, that is, the above-described slit groove (narrow inverted T-shaped groove or I-shaped groove) having a narrow width, which is formed around the groove, is connected. In this way, vibration may be blocked or absorbed.

Further, unlike the main body of the disk drive device having the continuous chassis as described above, a portion corresponding to the chassis plate (# 1) on the spindle motor side and the chassis plate (# 2) on the optical pickup side.
In the case of a structure in which the portions corresponding to the above are separate and not continuous, the formation of the slit groove may be performed as follows.

That is, one independent chassis plate (first chassis plate) that supports the spindle motor side and the other independent chassis plate (second chassis plate) that supports the optical pickup side are, for example, as described above. A part of the magnetic circuit of the VCM that moves the optical pickup in the radial direction of the disk (for example, the outer yoke) or two parallel moving guide parts are used to make them longer, and the first chassis plate It is extended to the side to serve as a connection between the first chassis plate and the second chassis plate.

In the case of such a connection, the outer yoke of the magnetic circuit of the VCM used for the connection, or the two moving guides are moved on or outside the outer yoke. A slit groove having a narrow inverted T-shaped cross section or a narrow I-shaped cross section is formed at one or several places on the exposed portion of the member between the two chassis plates on the guide portion. Thus, the elastic material is interposed in the groove. In this way, vibration may be blocked or absorbed. In any of the above improvements,
Regarding the elastic material used as the damper material, similarly,
It can be selected from the above-mentioned viewpoint.

It should be noted that VCM is used for the connection between both plates described above.
In the case of using the outer yoke of the magnetic circuit, the two movement guide portions of the carriage of the optical pickup are also attached at their end portions across the portions of both the first chassis plate and the second chassis plate. In the case of adopting such a configuration, in addition to the above-described configuration, a fixing member made of a plastic material is used for attaching and fixing the ends of the two moving guide portions on the first chassis plate side on the spindle motor side. Should be used. In this way, the stop member is effective in suppressing and reducing vibration.

Further, in particular, when the two moving guide portions of the optical pickup used for connection have a circular cross section (two guide rods), the above-mentioned first and second movements are performed. In addition to the above-described method of providing a groove with a damper material in the exposed portion of the guide rod between the chassis plates, the following method may be performed. That is, the guide shaft 274, the leaf spring 302, and the damper member 30 according to the embodiment shown in FIGS.
The relationship with the metal bearing 301 provided with No. 3 is utilized.

Specifically, on the first chassis plate side, as a means for receiving the two guide rods extending from the second chassis plate side, the metal bearing 300 having the above structure is used as a receiving member. The two guide rods of the carriage are inserted through them. In this way, the structure of the connecting part
As a structure between the guide shaft 274 and the bearing portion 300 described above, and in this case, since it is not necessary to slide the spacer, a spacer is provided and both plates are fixed by an adhesive so as not to move, thereby realizing the connection. You may do it. In the case of this configuration, the same effects as those described in the above embodiment are obtained.
It will be obtained at such a connecting portion.

In addition to the above, the present invention can be variously modified and changed. For example, in the embodiment, the disk 242 is positioned on the outer circumference of the disk hub 277 in the radial direction, but may be positioned on the inner circumference side of the disk hub 277 by the spindle shaft. As a modification of the electromagnetic drive device for the electromagnet 271 and the permanent magnet 272 shown in FIG. 1, a moving coil type may be used. Further, although the embodiment is a recording / reproducing apparatus, the present invention can be applied to a write-once type and a reproducing only type.

The contents described in the above embodiments can be understood as the following inventions. (1) An optical disk recording and / or reproducing apparatus characterized in that a cartridge and a cartridge positioning pin are brought into contact with each other to detect positioning, and then a spindle cup is raised to mount an optical disk on the spindle cup. According to this, after the positioning is detected by the cartridge positioning pin, the optical disk is clamped by the spindle cup, the disk is locked without overloading the cartridge, and then the disk is accurately clamped. It is possible to obtain effects such as prevention of scratches on the disk surface due to contact with the disk.

[0059]

According to the present invention, an optical disc for recording and / or reproducing information is provided with a mechanism having a block provided with a spindle motor for rotating the optical disc as a movable block and moving the block with respect to the disc. In the recording and / or reproducing apparatus, the resonance of the bearing portion due to the vibration of the rotating spindle motor is suppressed, and the resonance with the optical disk surface due to the vibration reaction force of the actuator of the objective lens is also suppressed. It can be significantly improved.

[Brief description of drawings]

FIG. 1 is an optical disc recording and / or recording medium according to an embodiment of the present invention.
Alternatively, it is a diagram showing a configuration of a reproducing apparatus.

FIG. 2 is a diagram showing an example of a structure of a metal bearing in the same example.

FIG. 3 is a diagram similarly showing another example.

FIG. 4 is a diagram showing still another example.

FIG. 5 is a diagram showing another embodiment.

FIG. 6 is a diagram showing still another embodiment.

FIG. 7 is a diagram which is used for explaining a main part of an apparatus having another known type of spindle motor vertical movement mechanism.

FIG. 8 is a diagram showing a bearing portion of a conventional example.

[Explanation of symbols]

20 Objective Lens 30 Carriage 40 Tilt Mirror 100 Leaf Spring 101 Curved Part 105 Damper Material 120 Pins 150 Damper Material 201 Base (Main Body) 202 Slot Groove 204 Spindle Motor 242 Magneto-Optical Disk 251 Disk Cartridge 271 Electromagnet 272 Permanent Magnet 273 Movable Block ( Lifting block) 274 Guide shaft 275 Spindle cup 276 Positioning pin (cartridge positioning pin) 277 Disk hub 278 Rack 279 Gear 280 Motor (lifting motor) 281 Compression coil spring 282 Reflecting member 283 Photo reflector 284 Yoke 285 Permanent magnet 286 Stopper 287 Compression coil spring 288 Spindle shaft 289 Key 300 Bearing part 301 Bearing (metal bearing) 301a Sliding part Split groove) 301b slotted portion (slit grooves) 301c, 301d, 301e slotted portion (slit grooves) 302 leaf spring 303 damper member 310 spacer

Claims (1)

[Claims] 1. A movable block having a spindle motor for rotating and driving an optical disk, and a bearing portion for supporting the movable block and translating it along a guide axis.
An optical disk recording and / or reproducing apparatus including a drive mechanism for moving the movable block with respect to the disk, wherein a part of the optical disk recording and / or reproducing contacting the guide shaft surface is filled with a damper material via a leaf spring material. An optical disk recording and / or reproducing apparatus comprising a bearing portion.