JP2001263421A - Insulator and disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To selectively support two kinds of optical pickup units by one kind of insulators. SOLUTION: A pair of right and left groove-like portions 188, 189 to support two kinds of elevating/lowering frames 16, 116 with two kinds of the optical pickup units 38, 138 of different thickness are formed on one kind of insulators 119, 120 by in a deviated manner by 90 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a substantially gourd-shaped insulator for elastically supporting a supported member, and a disk drive device using the insulator.

[0002]

2. Description of the Related Art The applicant of the present invention has previously applied for a tray type optical disk device as shown in FIGS. 13 to 24 as an optical disk device which is an example of a disk drive device. First, as shown in FIG. 23, an optical disk 1 such as a CD or DVD, which is a disk-shaped recording medium, is placed horizontally in a recess 3 formed on the upper surface of a tray main body 2a of a disk tray 2. Later, when the tray front panel 2b of the disc tray 2 is lightly pressed in the direction of arrow a, a loading switch (not shown) is turned ON, and the loading mechanism 27 described later causes the loading mechanism 27 to turn on as shown in FIG.
The disk tray 2 is drawn horizontally from the tray entrance 4 of the front panel 60 into the disk device main body 6 of the optical disk device 5 in the direction of arrow a, which is the loading direction, and the optical disk 1 is placed on the disk table of the spindle motor as described later. It is automatically loaded horizontally.

After the loading, the optical disk 1 is rotated at a high speed by a spindle motor by a recording and / or reproduction command signal from a host computer, and data is recorded on the optical disk 1 by an optical pickup as data pickup means. And / or played. When the eject button 7 on the front panel 60 is pressed after the recording and / or reproduction of the optical disc 1, the loading mechanism 27 described later causes the loading mechanism 27 shown in FIG.
As shown in FIG. 2, the disc tray 2 is automatically unloaded from the tray entrance 4 to the outside of the disc device main body 6 in the direction of arrow b which is the unloading direction.

Next, a horizontal tray main body 2a of the disk tray 2 and a vertical tray front panel 2b perpendicular to the directions of arrows a and b are formed of synthetic resin or the like. the rear end from the central portion of the recess 3 (the arrow a direction side end portion) arrow a a loading and unloading direction toward the side, long hole-shaped bottom opening along the b direction parallel to the tray center P ₁ 8 are formed. The disk tray 2 is configured to be driven horizontally into and out of the disk device main body 6 in directions indicated by arrows a and b by a tray moving mechanism (not shown) of a loading mechanism. Four disc holding portions 3a are rotatably adjusted at four locations on the outer periphery of the recess 3 of the disc tray 2, and are inserted vertically into the recess 3 when the optical disc apparatus 5 is used vertically. The optical disc 1 is configured to be held by these disc pressing portions 3a.

Next, a substantially box-shaped, shallow chassis 14 formed of a synthetic resin or the like is provided inside the disk drive body 6.
And a lifting frame 16 which is a supported member formed of a synthetic resin, a sheet metal, or the like is mounted in a large opening 14b of a substantially rectangular shape formed in a bottom portion 14a of the chassis 14. This lifting frame 1
6 includes a total of four substantially gourd-shaped insulators 19, which are shock absorbers formed of elastic members such as rubber at two places on the left and right sides on the rear end 16a side and two places on the left and right sides on the front end part 16b side. , 20 are mounted. Then, a pair of left and right insulators 19 attached to the rear end 16a of the elevating frame 16 are attached to the upper portion on the rear end side of the bottom portion 14a of the chassis 14 by a set screw 21 inserted in the center of the insulators 19. A pair of left and right insulators 20 attached to the front end 16b of the motor drive mechanism 2 are driven by a set screw 22 inserted in the center thereof.
3 are attached to the lower part on both left and right sides. The vertical drive frame 23 causes the front end 16b side of the vertical frame 16 to pass through the pair of left and right insulators 20 to form a pair of left and right insulators 19 at the rear end 16a.
The arrow c,
It is configured to be driven up and down in the d direction.

[0007] As shown in FIGS. 17 to 19, a loading mechanism 27 is attached to an upper portion on the front end side of the bottom 14 a of the chassis 14, and the loading mechanism 27 is driven by a loading motor 28 and a belt transmission mechanism 29. The lifting drive frame 23 has a cam lever 34 that is rotatably driven via the gear transmission mechanism 30.
Are vertically rotatably attached to the left and right sides of the opening 14b of the chassis 14 near the front end by a pair of left and right fulcrum pins 24 provided at the rear ends of the left and right sides,
A pair of left and right guide pins 2 is located at a position forward of the pair of left and right fulcrum pins 24 on both left and right sides of the lift drive frame 23.
5 is attached. And the lifting drive frame 2
Cam follower pin 3 attached at the approximate center of the front end of 3
6 is inserted into the cam groove 35 of the cam lever 34.

At the time of loading, the loading tray pulls the disk tray 2 horizontally from the unloading position outside the optical disk device 5 shown in FIG. 23 to the loading position inside the optical disk device 5 shown in FIGS. After that, the cam groove 35 of the cam lever 34 driven to rotate in the direction of arrow c 'in FIG.
The cam driven pin 3 at the tip of the lifting drive frame 23
6 is driven upward in the direction of arrow c, and the lifting drive frame 23 raises the lifting frame 16 via the insulator 20 from the downwardly inclined lower position shown in FIG. 18 as shown in FIG. Is driven up in the direction of arrow c around the pair of left and right insulators 19 to a raised position where the horizontal position is reached.

When the disc tray 2 is unloaded, the cam groove 35 of the cam lever 34, which is driven to rotate in the direction of arrow d 'in FIG.
The cam follower pin 36 is driven downward in the direction of arrow d, which is the lower direction, and the insulator 2 is
0, the disk tray 2 is moved downward from the raised position shown in FIG. 17 to the lowered position shown in FIG. 18 around the pair of left and right insulators 19 in the direction of arrow d. This is pushed in the direction of arrow b from the loading position in the optical disk device 5 to the unloading position outside the optical disk device 5 shown in FIGS. The disc tray 2 is loaded and unloaded in the directions of arrows a and b via a rack (not shown) by forward and reverse rotation of a pinion 31 provided in a gear transmission mechanism 30 of the loading mechanism 27. Is configured.

Next, the lifting frame 16 constituting the unit base of the optical pickup unit 38, which is a data pickup unit, has a substantially rectangular frame shape. A spindle motor 39 is mounted vertically above the front end 16b of the elevating frame 16, and a disk table 40 made of a magnetic material such as metal is horizontally fixed to the upper end of the motor shaft 39a. ing. A centering guide 40a into which the center hole 1a of the optical disk 1 is fitted is formed integrally with the upper center of the disk table 40. A substantially rectangular opening 1 formed inside the lifting frame 16 is also provided.
An optical pickup 41 as a data pickup is mounted horizontally behind the spindle motor 39 in 6c. The optical pickup 41 has a thread 43 on which an objective lens 42 is mounted, and an optical block for transmitting and receiving a laser beam to and from the objective lens 42 is integrally attached to a side surface of the thread 43. Note that an objective lens actuator section 44 formed in a convex shape toward the optical disc 1 is mounted on the thread 43, and the objective lens 42 is incorporated above the objective lens actuator section 44 by a biaxial actuator.

The rear end 16a of the lifting frame 16
On the upper side of one side, a thread 43 is attached to the main guide shaft 45.
Sled moving mechanism 47 for linearly moving in the directions of arrows a and b along a pair of left and right guide shafts including
Is attached, and the thread moving mechanism 47 is
A pinion 50 driven forward and reverse by a sled drive motor 48 via a gear train 49;
And a rack 51 which is attached to one side surface and is linearly driven by a pinion 50. The spindle motor 39 and the objective lens 42 are located at the tray center P ₁
Be arranged above, and is configured to objective lens 42 is moved along the tray center P ₁ arrow a, the direction b. The rear end 16a of the lifting frame 16
A skew adjustment mechanism 57 that adjusts the vertical angle of the main guide shaft 45 and the sub guide shaft 46 is mounted below.

[0011] Then, across the upper portion of the disk tray 2, between the upper end portions of the left and right side plates of the chassis 14,
A clamper supporting member 52 formed of a sheet metal or the like is erected horizontally, and at a position directly above the disc table 40,
A disk-shaped disk clamper 53 made of a non-magnetic synthetic resin is held in a circular hole 54 formed at the center of the clamper support member 52 so as to be movable vertically, horizontally, and back and forth within a certain range. Have been. A clamper receiver 52a for receiving a flange 53a integrally formed on the outer periphery of the upper end of the disk clamper 53 from below is integrally formed on the outer periphery of the circular hole 54 of the clamper support member 52. A disk-shaped magnet 55 is horizontally embedded in the upper center of the disk clamper 53. Further, an upper cover 6b described later, which is formed of a sheet metal, which is a magnetic member, is attached to an upper portion of the chassis 14 so as to straddle an upper portion of the clamper support member 52.

Accordingly, as shown in FIG. 14, after the optical disk 1 is horizontally loaded into the disk device main body 6 from the direction of the arrow a by the disk tray 2, as shown in FIG. When it is raised in the direction of arrow c and becomes horizontal, as shown in FIG.
The disk table 40 is provided with the bottom opening 8 of the disk tray 2.
From above, and the centering guide 40a of the disc table 40 is inserted into the center hole 1a of the optical disc 1.
Is fitted from below. Then, the optical disk 1 is moved to the recess 3 of the disk tray 2 by the disk table 40.
The disk clamper 53
Is slightly lifted upward from the flange receiver 52a of the clamper support member 52. At this time, the disk clamper 53 is attached to the disk table 40 close to the lower surface thereof by the magnetic attraction force of the magnet 55.
Then, the optical disk 1 is sucked onto the disk table 40 and is chucked horizontally on the disk table 40 by the disk clamper 53.

The spindle motor 3 receives a recording and / or reproduction command signal from the host computer.
9, the optical disk 1 is rotated at a high speed of 3600 rpm or more, and the sled moving mechanism 47 causes the sled 43 of the optical pickup 41 to move in the direction of arrows a and b.
The objective lens 42 is moved in the tray center P
_The seek is performed in the directions of arrows a and b along ₁ . Then, the spot light of the laser beam LB transmitted from the optical block is irradiated and focused on the lower surface of the optical disc 1 by the objective lens 42, and the reflected light is received by the optical block through the objective lens 42, and the data is transferred to the optical disc 1. Is recorded and / or reproduced.

The sled moving mechanism 47 drives the sled 43 linearly by a pinion 50 driven forward and reverse by a sled drive motor 48 via a gear train 49, thereby moving the sled 43 to a pair of left and right guide shafts 4.
It moves in the directions of arrows a and b along 6. Then, when the eject button 7 is pressed after recording and / or reproduction of the optical disc 1, as shown in FIGS. 14 and 18, the elevating frame 16 is lowered in the direction of arrow d to the lowered position, and the disc table 40 is disc-shaped. After the chucking is released from the clamper 53 and the optical disk 1 is detached below the optical disk 1,
The optical disk 1 is placed horizontally in the recess 3 of the disk tray 2 and is unloaded horizontally outside the disk device main body 6 in the direction of arrow b.

In recent years, as shown in FIGS. 13 to 16, an autobalancer 71 capable of automatically canceling an eccentricity caused by a manufacturing error of the optical disc 1, that is, an imbalance of the center of gravity. Is incorporated in the disk table 40 (or the disk clamper 53). This optical auto balancer 71 has a concentric hollow annular portion 72 formed on the outer peripheral portion of the disk table 40, and a plurality of, for example, six balls formed of steel balls serving as balance members in the hollow annular portion 72. 73 is accommodated so as to be freely movable in the circumferential direction. The imbalance of the center of gravity of the optical disk 1 is automatically canceled by the high speed rotation of the disk table 40 by the spindle motor 39, and the motor shaft 39a Vibration is reduced.

The operation principle of the auto balancer 71 is as follows. That is, as shown in FIG. 15A, when the rotation speed ω of the motor shaft 39a is lower than the critical speed ωc, a plurality of balls 73 are generated in the hollow annular portion 72 due to the imbalance of the center of gravity of the optical disc 1. The motor 73 oscillates in the same phase as the imbalance with the center of gravity G of the motor shaft 39a outside, and at this time, the balls 73 move toward the center of gravity G due to the tangential component T of the centrifugal force F. , The imbalance increases, and the motor shaft 39a
The vibration of is further increased.

When the rotational speed ω of the motor shaft 39a is higher than the critical speed ωc, as shown in FIG. Motor shaft 3 generated by balance
9 oscillates with the center of gravity G inside, and becomes in phase opposite to unbalance. At this time, the ball 73 moves to the opposite side of the center of gravity G due to the tangential component T of the centrifugal force F, and the imbalance is canceled, so that the optical disk 1 is balanced and the axis O _{1 of the} motor shaft 39a is balanced. and the diffusion center O ₂ of the plurality of balls 73 are in agreement, the vibration of the motor shaft 39a is converged. At this time, the centrifugal force F of the plurality of balls 73 is
Is zero, and the plurality of balls 73 are stabilized at a certain position.

When recording and / or reproducing data from / on the optical disc 1, the disc table 40 is constantly driven to rotate at a speed higher than the critical speed ωc by the spindle motor 39, so that the imbalance of the optical disc 1 is automatically adjusted. You will be able to cancel. FIG. 16A shows an unbalanced cancel state of the center of gravity of the optical disc 1 having the maximum center of gravity (the amount of eccentricity of the center of gravity is the maximum). In the hollow annular portion 72, the unbalance of the center of gravity of the optical disc 1 having the maximum eccentricity is canceled by stabilizing by gathering substantially in a fan shape at the opposite phase position of the center of gravity G. FIG. 16B shows a case of a true center of gravity (there is no eccentricity of the center of gravity). In this case, a plurality of balls 73 are uniformly distributed around the center of gravity G in the hollow annular portion 72. At a position spread at an angle of.

FIGS. 8 to 12 show a member to be supported, and a total of four members for supporting the lifting frame 16 constituting the unit base of the optical pickup unit 38 on which the spindle motor 39 and the optical pickup 41 are mounted. FIG. 3 shows details of conventional insulators 19 and 20. FIG.

Then, these insulators 19, 2
Numeral 0 is the same in shape and size. In order to make it easier to cancel the unbalance of the center of gravity of the optical disc 1 by the auto balancer 71, the resonance frequency f ₀ of these insulators 19 and 20 is set as small as possible. As a result, it is formed of a very soft elastic member such as rubber. Then, these insulators 19 and 20 and the upper annular projection 81 integrally formed on the same axis P ₁₁ form a lower annular protrusion 82, a hollow substantially gourd-type by an intermediate annular recess 83 between them Is formed. The upper annular convex portion 81 and the lower annular convex portion 82
A pair of ribs 84 parallel to these axes are integrally formed at both left and right positions on the outer periphery of the intermediate annular concave portion 83,
A pair of left and right convex portions 85 is integrally formed on the inner periphery of the intermediate annular concave portion 83. Further, a lower opening 86 and a lower opening 8 are provided at the lower end of the lower annular projection 82 and the upper end of the upper annular projection 81.
7 are formed.

As described with reference to FIGS. 17 to 22, a pair of left and right insulators 19 attached to the left and right sides of the rear end portion 16a of the lifting frame 16 are provided as shown in FIGS. 16 is fitted into the outer periphery of the intermediate annular concave portion 83, and a pair of left and right ribs 84 are inserted into a pair of right and left rib grooves 92 formed on both left and right sides of the fitting hole 91. The lifting frame 16 is moved between the upper annular projection 81 and the lower annular projection 82.
Is elastically sandwiched from above and below. Then, in a state where the lower opening 86 of the insulator 19 is inserted into the outer periphery of the screwing boss 93 integrally formed and projected on the chassis 14 and positioned, the set screw 21 composed of a stepped screw is inserted into the insulator. 19, the large-diameter stepped portion 102 on the lower surface of the screw head 101 of the set screw 21 is fitted into the inner periphery of the upper opening 87, and the large-diameter stepped portion 102 of the set screw 21 is inserted. The lower small-diameter shaft portion 103 is inserted into the inside of the pair of left and right convex portions 85 inside the insulator 19, and the small-diameter male screw 104 at the lower end of the set screw 21 is formed in the center of the screw boss 93. By screwing into the female screw 94 and fastening, the small-diameter shaft portion 103 of the set screw 21 is vertically fixed on the screwing boss 93, and the upper annular convex portion 81 of the insulator 19 is stopped. It is mounted so as to hold down from above a larger diameter screw head 101 di 19.

As described with reference to FIGS.
A pair of left and right insulators 20 attached to the left and right sides of the front end portion 16b of the lifting frame 16 are shown in FIGS.
As shown by the reference numerals in parentheses in FIG.
And a pair of right and left ribs 84 are inserted into a pair of right and left rib grooves 92 formed on both right and left sides of the fitting hole 91. The lifting drive frame 23 is elastically sandwiched between the upper annular projection 81 and the lower annular projection 82 from above and below. Then, the lower opening 86 of the insulator 20 is inserted into the outer periphery of a screwing boss 93 which is formed on the elevating frame 16 by burring or the like and projected, and is positioned. The screw 21 is inserted into the upper opening 87 of the insulator 20, and the large-diameter step 102 on the lower surface of the screw head 101 of the set screw 21 is inserted.
Is fitted to the inner periphery of the upper opening 87, and the small-diameter shaft portion 103 below the large-diameter step portion 102 of the set screw 21 is connected to the insulator 2.
0, and is screwed into the female screw 94 formed at the center of the screwing boss 93 by inserting the small-diameter male screw 104 at the lower end of the set screw 21 into the inside of the pair of left and right convex portions 85 inside. By fastening, the small-diameter shaft portion 103 of the set screw 21
Is fixed vertically on a screwing boss 93, and the upper annular convex portion 81 of the insulator 20 is attached so as to be pressed down from above by the large diameter screw head 101 of the set screw 19.

As described above, the lifting frame 16 on which the spindle motor 39 and the optical pickup 41 are mounted is connected to the four insulators 19 having a small resonance frequency f ₀ ,
The external vibration (external shock) generated during recording and / or reproduction of the optical disc 1 by elastically supporting the chassis 14 and the lifting drive frame 23 by the 20
Can be sufficiently absorbed by these insulators 19 and 20, and a high-performance and high-quality optical disk device 5 that does not cause skipping of sound or video or the like can be provided.

[0024]

In recent years, manufacturers have been manufacturing and selling various types of disk drive devices for recording and / or reproducing various types of disks. Needless to say, they want a disk drive device. Therefore, although manufacturers try to reduce various costs related to the design and manufacture of disk drive devices, at present,
The fact is that each disk drive device is designed and manufactured by model (performance), and the cost of designing by model and equipment such as molds to manufacture parts by model are required.
Since these costs were slid to the selling price, there was a limit to cost reduction.

On the other hand, the conventional optical disk device 5 is also designed and manufactured for each model (performance), and the total of four insulators 19 and 20 for mounting the optical pickup unit 38 on the chassis 14 are, of course, It was designed and manufactured separately. In the conventional optical disk device 5 of this type, the lifting frame 16 and the lifting driving frame 23 made of sheet metal are formed as thin plates having a thickness T ₁ of 1.2 mm, so that the optical disk device 5 can be reduced in weight and cost. The insulators 19 and 20 were designed and manufactured as dedicated components for the lifting frame 16 and the lifting driving frame 23 having a thickness T ₁ of 1.2 mm.

That is, the innermost circumference of the annular groove 83a on the outer circumference of the intermediate annular recess 83 of the insulators 19 and 20, which are the support portions of the supported members into which the lifting frame 16 and the lifting drive frame 23 are fitted by the fitting holes 91. thickness is the thickness T ₁ of the lift frame 16 and the elevation drive frame 23 is configured in the same size, if the thickness T ₁ of the these lift frame 16 and the lifting drive frame 23 and thicker than 1.2 mm, the The lifting frame 16 and the driving frame 23 having a large thickness T ₁ cannot be fitted into the annular groove 83 a on the outer periphery of the intermediate annular recess 83 of the insulators 19 and 20 by the fitting holes 91. The lifting frame 16 and the lifting driving frame 23 having a large T ₁ cannot be supported by these insulators 19 and 20.

On the other hand, in the case where the thickness T ₁ of the these lift frame 16 and the lifting drive frame 23 and thin 1.2mm or less, the fitting hole and the thickness T ₁ is thin lift frame 16 and the lifting drive frame 23 of these when fitted to the outer periphery of the annular groove 83a of the intermediate annular recess 83 of the insulator 19 by 91, the thickness T ₁ is thin lift frame 16 and the elevation drive frame 23 and the annular groove 83a
In particular, a gap in the axial direction of the insulators 19 and 20 is formed. In particular, when the optical disc apparatus 5 is used in the vertical use state from the horizontal use state to the vertical use state, the lifting frame 16 and the lifting drive frame 23 Annular groove 83a
As a result, the lifting frame 16 and the lifting drive frame 23 cannot be stably supported by the insulators 19 and 20.

Therefore, as in the prior art, the optical disk device 5
Insulators 19 and 20 designed and manufactured for each model
Then, in order to change the performance of the optical pickup unit 38, the lifting frame 16 and the lifting drive frame 23 are changed.
However, there is a problem that when the sheet thickness is changed, it becomes impossible to use.

The present invention has been made in order to solve the above-mentioned problems, and an insulator in which one insulator can selectively support a plurality of supported members having different thicknesses, and a spindle. It is an object of the present invention to provide a disk drive device in which the performance of a unit on which a motor and a data pickup unit are mounted can be easily changed.

[0030]

An insulator according to the present invention for achieving the above object is constituted by an elastic member and has a different thickness for selectively stably supporting a plurality of types of supported members having different thicknesses. A plurality of support parts are integrally formed. Further, the disk drive device of the present invention is constituted by an elastic member, and a plurality of types of unit bases having different thicknesses are selectively provided on an insulator for elastically supporting a unit base on which a spindle motor and data pickup means are mounted. A plurality of support portions having different thicknesses for stable support are integrally formed.

In the insulator of the present invention configured as described above, a plurality of support members having different thicknesses are selectively supported by a plurality of support portions having different thicknesses of one insulator formed by the elastic member. be able to.
In addition, in the disk drive device of the present invention, a plurality of insulators each formed by an elastic member and having different thicknesses, a spindle motor and a data pickup unit are mounted, and a plurality of unit bases having different thicknesses are selected. Can be supported.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an optical disk device to which the present invention is applied will be described below with reference to FIGS.
Note that the same components as those in FIGS. 8 to 24 are denoted by the same reference numerals, and redundant description will be omitted.

First, in the optical disk device 5 of the present invention, while the disk tray 2 and the disk device main body 6 (including the chassis 14 and the loading mechanism 27) are composed of common parts, this kind of optical disk device 5 An optical pickup unit as a certain data pickup means is easily changed from the conventional simple optical pickup unit 38 shown in FIGS. 19 to 22 to the high-performance optical pickup unit 138 shown in FIGS. A high performance optical disk device 5
Can be realized at low cost.

As shown in FIG. 1A, in the conventional optical pickup unit 38, as described above, the thickness T _{1 of} the lifting frame 16 and the lifting driving frame 23 made of sheet metal is 1.2 mm. And thin (small), lightweight,
In addition, although the cost is low, it is weak against the vibration system, and the elevation frame 16 and the elevation drive frame 23 are easily resonated by external vibration or internal vibration.

On the other hand, as shown in FIG. 1B, a new optical pickup unit 138 comprises a lifting frame 116 and a lifting driving frame 1 made of sheet metal.
23 thick thickness T ₂ is the 1.6mm of (large), the weight is slightly heavier, and, although it is expensive, very strong with respect to the drive system, these lifting frame 116 and lifting the external vibration or internal vibration The drive frame 123 is less likely to resonate. Incidentally, the lift frame 116 and other configurations other than the thickness T ₂ of the elevation driving frame 123 of the new optical pickup unit 138 is substantially equally as the conventional optical pickup unit 38.

A total of four insulators 119 and 120 of the present invention shown in FIGS. 1 to 5 developed for realizing the optical disk device 5 are composed of two types of supported members having different thicknesses T ₁ and T _2. The two types of lifting frames 16 and 116 constituting the unit base can be selectively and elastically supported on the chassis 14 and the lifting driving frames 23 and 123. I have.

That is, as shown in FIGS. 1 to 5, a total of four insulators 119 and 120 of the present invention have the same shape and size as in the prior art, and the optical disc 1 by the auto balancer 71 described above. In order to make it easy to cancel the imbalance of the center of gravity of the insulators, block insulators such as rubber or a block copolymer elastomer (TPEE) made of nylon 12 and polyether are used so that the resonance frequency f ₀ of these insulators 119 and 120 is made as small as possible. It is formed by a very soft elastic member. Then, these insulators 119 and 120 and the upper annular protrusion 181 integrally formed on the same axis P ₁₁ form, with the lower annular protrusion 182, hollow substantially gourd-type by an intermediate annular recess 183 between them Is formed. And
A total of four projections 185 are integrally formed at 90 ° intervals on the inner periphery of the intermediate annular recess 183, and the lower annular projection 182 is formed.
The lower opening 18 is provided at the lower end of the
6 and a lower opening 187 are formed.

Then, on the outer periphery of the intermediate annular concave portion 183,
Two sets of left and right support parts, a total of four groove-shaped parts 18
8 and 189 are formed shifted by 90 °. And
Innermost thickness T ₃ is formed in a thickness slightly smaller than the thickness T ₁ of the 1.2mm conventional lift frame 16 and the lifting drive frame 23 of the first pair and a pair of the grooved portion 188. On the other hand, a pair of left and right groove-shaped portions 1, which is the next set shifted by 90 ° with respect to the pair of left and right groove-shaped portions 188.
The thickness T ₄ of the innermost circumference of the 89 is slightly smaller than the 1.6 mm thickness T _{2 of the} new lifting frame 116 and the lifting driving frame 123. Note that a pair of left and right groove-shaped portions 188, 189 are provided on the outer periphery of the upper annular convex portion 181.
A pair of left and right small projections 190 are formed integrally at positions corresponding to the pair of left and right groove portions 189 so that the phase state of the pair can be easily identified from the outside. A pair of left and right small recesses 192 and 193 are formed on the innermost circumference at the center in the circumferential direction of the groove portions 188 and 189.

By using the insulators 119 and 120 of the present invention thus configured, two types of lifting frames 16 and 116 having different thicknesses T _{1 and} T ₂ can be selectively provided to the chassis 14 and the lifting driving frames 23 and 123. Can be elastically supported.

That is, as shown in FIG. 1A and FIG.
And thickness T₁Of the conventional lifting frame 16 of 1.2 mm
The rear end 16a is formed using a pair of left and right insulators 119.
When installing on the chassis 14,
Thickness T of the left and right of the data 119 _ThreeGroove 188 with small
In the left-right direction, and inside the pair of left and right groove-shaped portions 188.
The lifting frame 1 is located between the upper and lower annular convex portions 181 and 182.
6 and the left and right side portions 91a of the fitting hole 91 are insulators.
The fitting is performed so as to press-fit against the elasticity of 119. What
At this time, both front and rear portions 91b of the fitting hole 91 are thick.
Only T_FourAre fitted in a pair of front and rear groove portions 189 having a large size.
Therefore, the front and rear portions 91b of the fitting hole 91
The upper part between the descending frame 16 and the upper and lower annular convex parts 181 and 182
Downward (play occurs as a gap in the axial direction.
The left and right side portions 91a of the mating hole 91 are both upper and lower annular convex portions 18.
No vertical play (i.e., rattling) between 1,182
Elastically sandwiched from above and below to ensure stable support
Is done. In addition, at this time, the fitting hole 9 of the lifting frame 16 is
1 on the inner periphery of the center portion in the circumferential direction of the left and right side portions 91a.
A pair of left and right small protrusions 194 are formed into a pair of left and right small recesses.
192 to fit the lifting frame 16
Shaft center P of insulator 119₁₁Prevent rotation around
By this, the lifting frame 16 can be more stably
Can be supported.

Thereafter, as described above, the lower opening 186 of the insulator 119 is inserted into the outer periphery of the screwing boss 93 integrally formed on the chassis 14 and protruded, and is positioned so as to be stepped. The set screw 21 made of a screw is inserted into the upper opening 1 of the insulator 119.
87, the large-diameter step 102 on the lower surface of the screw head 101 of the set screw 21 is fitted to the inner periphery of the upper opening 187, and the small diameter of the lower part of the large-diameter step 102 of the set screw 21 The shaft 103 is inserted through a total of four protrusions 185 inside the insulator 119, and the small-diameter male screw 104 at the lower end of the set screw 21 is inserted into the female screw 94 formed in the center of the screw boss 93. The small-diameter shaft portion 103 of the set screw 21 is vertically fixed on the screwing boss 93 by screwing into the upper portion. Diameter screw head 101
The front end 16b of the lifting frame 16 is detachably mounted on the chassis 14 so as to be pressed down from above.

Next, as shown by parenthesized symbols in FIGS. 1A and 2, the front end 16 b of the conventional elevating frame 16 having a thickness T ₁ of 1.2 mm is formed using a pair of left and right insulators 120. When mounted on the lower part of a conventional elevating drive frame 23 having a thickness T ₁ of 1.2 mm, the pair of left and right thicknesses T ₃ of the insulator 120 is small.
The pair of left and right groove portions 18
8, the right and left side portions 91a of the fitting hole 91 of the lifting drive frame 23 are fitted between the upper and lower annular convex portions 181 and 182 so as to press-fit against the elasticity of the insulator 119. At this time, both front and rear portions 91 of the fitting hole 91 are formed.
b is fitted in a pair of front and rear groove portions 189 having a large thickness T _4, so that the front and rear drive frames 23 and the upper and lower annular convex portions 181 and 1
In the vertical direction (an axial gap), the left and right side portions 91a of the fitting hole 91 have vertical play (that is, play) between the upper and lower annular projections 181 and 182. It is stably supported by being elastically sandwiched from above and below so that it is completely absent, and at this time, is integrally formed on the inner periphery of the center part in the circumferential direction of the left and right side parts 91a of the fitting holes 91 of the lifting drive frame 23. The pair of left and right small projections 194 are fitted into the pair of left and right small recesses 192 to prevent the insulator 120 from rotating around the axis P ₁₁ with respect to the lifting drive frame 23, thereby allowing the lifting frame 16 to rotate.
Can be more stably supported.

Then, as described above, the lower opening 186 of the insulator 120 is connected to the lifting frame 1.
6 is inserted into the outer periphery of the screwing boss 93 formed by burring or the like and protruded, and positioned.
A set screw 22 composed of a stepped screw is inserted into the upper opening 187 of the insulator 120 and the set screw 2 is inserted.
The large-diameter step portion 102 on the lower surface of the screw head 101 is fitted into the inner periphery of the upper opening 187, and the large-diameter step portion 10 of the set screw 21 is fitted.
2 is inserted through the inside of the total of four projections 185 inside the insulator 120, and the small-diameter male screw 104 at the lower end of the set screw 22 is screwed into the boss 9.
By screwing into the female screw 94 formed at the center of the screw 3, the small-diameter shaft portion 103 of the set screw 22 is vertically fixed on the screw boss 93, and the upper portion of the insulator 120 is fixed. The front end 16b of the elevating frame 16 is detachably attached to the lower part of the elevating drive frame 23 via the pair of left and right insulators 120 so that the annular convex portion 181 is pressed from above by the large diameter screw head 101 of the set screw 22. be able to.

Next, FIG. 1B, FIG. 3, FIG. 6 and FIG.
As shown in, when mounted on the chassis 14 with the rear end portion 116a of the pair of left and right insulators 119 new lift frame 116 having a thickness T ₂ is 1.6mm, the
The pair of left and right annular grooves 189 of the insulator 119 is oriented in the left-right direction with the thick pair of left and right thicknesses T _4, and the lifting frame 116 is fitted between the upper and lower annular projections 181 and 182 in the pair of left and right grooves 189. Left and right sides 91a of hole 91
Are fitted so as to press-fit against the elasticity of the insulator 119. At this time, the groove-like portion 188 front and rear side portions 91b before and after the thickness T ₃ smaller pair of the fitting hole 91
Since it is not possible to fit inside, a notch 196 for escape is formed in advance in the front and rear side portions 91b of the fitting hole 91 so as to escape. However, the left and right side portions 91a of the fitting hole 91 are elastically sandwiched between the upper and lower annular convex portions 181 and 182 from above and below so as to have no play (that is, rattling) in the vertical direction at all, and are stably supported. You. Moreover,
At this time, a pair of left and right small projections 195 integrally formed on the inner periphery of the center part in the circumferential direction of the left and right side portions 91 a of the fitting hole 91 of the elevating frame 116 are fitted into the pair of left and right small recesses 193. by preventing rotation about the axis P ₁₁ of the insulator 119 relative to the lifting frame 116, lifting frame 116 and more can be supported more stably improved.

Thereafter, as described above, the lower opening 186 of the insulator 119 is inserted into the outer periphery of the screw boss 93 integrally formed on the chassis 14 and protruded from the chassis 14, and is positioned with the step. The set screw 21 made of a screw is inserted into the upper opening 1 of the insulator 119.
87, the large-diameter step 102 on the lower surface of the screw head 101 of the set screw 21 is fitted to the inner periphery of the upper opening 187, and the small diameter of the lower part of the large-diameter step 102 of the set screw 21 The shaft 103 is inserted through a total of four protrusions 185 inside the insulator 119, and the small-diameter male screw 104 at the lower end of the set screw 21 is inserted into the female screw 94 formed in the center of the screw boss 93. The small-diameter shaft portion 103 of the set screw 21 is vertically fixed on the screwing boss 93 by being screwed into the screw, and the upper annular convex portion 181 of the insulator 119 is fixed to the large size of the set screw 21. Diameter screw head 101
, The rear end portion 116a of the elevating frame 116 can be detachably attached to the chassis 14 via a pair of left and right insulators 119.

Next, as shown in FIG. 1B and FIG. 3 by reference numerals in parentheses, and as shown in FIG. 6 and FIG.
The front end 1 of a new lifting frame 116 whose ₁ is 1.6 mm
When the thickness T ₂ with a pair of left and right insulators 120 attached to the lower part of the new lift drive frame 123 of 1.6mm is 16b, oriented groove-shaped portion 189 a pair of left and right thickness T ₄ is greater in the insulator 120 in the lateral direction In the pair of left and right groove portions 189, the right and left side portions 91 a of the fitting hole 91 of the lifting drive frame 123 are press-fitted between the upper and lower annular convex portions 181 and 182 against the elasticity of the insulator 120. Fit. At this time, since the front and rear side portions 91b of the fitting hole 91 can not be fitted before or after the thickness T ₃ smaller pair of the grooved portion 188, the front and rear side portions 91b of the fitting hole 91 A notch 196 for escape is formed in advance so as to escape.
However, the left and right side portions 91a of the fitting hole 91 are elastically sandwiched between the upper and lower annular convex portions 181 and 182 from above and below so as to have no play (that is, rattling) in the vertical direction at all, and are stably supported. You. In addition, at this time, a pair of left and right small projections 19 integrally formed on the inner periphery of the center part in the circumferential direction of the right and left side parts 91 a of the fitting hole 91 of the lifting drive frame 123.
5 is fitted to the pair of dimples 193, by preventing rotation about the axis P ₁₁ of the insulator 120 relative to the lifting drive frame 123, it can be supported more stably improve the lift driving frame 123 Can be.

Then, as described above, the lower opening 186 of the insulator 120 is connected to the lifting frame 1 as described above.
In the state of being inserted and positioned on the outer periphery of the screwing boss 93 formed and projected by burring or the like on the base 16, the set screw 22 formed of a stepped screw is inserted into the upper opening 187 of the insulator 120. The large-diameter step 102 on the lower surface of the screw head 101 of the set screw 22 is fitted into the inner periphery of the upper opening 187, and the small-diameter shaft 103 below the large-diameter step 102 of the set screw 22. The insulator 120
Of the set screw 22 is screwed into the female screw 94 formed at the center of the screwing boss 93 and fastened. By doing so, the small-diameter shaft portion 103 of the set screw 22
Is fixed vertically on the screwing boss 93, and the upper annular convex portion 181 of the insulator 120 is fixed to the set screw 2.
The large-diameter screw head 101 presses the front end portion 116b of the lifting frame 116 below the lifting drive frame 123 so that a pair of left and right insulators 120 is formed.
It can be detachably attached via.

As described above, by using the insulators 119 and 120 of the present invention, the thickness T ₁ of the conventional simple optical pickup unit 38 is reduced to 1.2 mm.
When thin (small) as well as a possible selectively attached to the lifting frame 16 chassis 14 and the elevation drive frame 23, the thickness T ₂ of the new high-performance optical pickup unit 138 is 1.6mm and thicker (larger) elevation The frame 116 is connected to the chassis 14 and the lifting drive frame 1
23 can be selectively attached. Moreover,
At that time, the two types of optical pickup units 38 and 138 can be selectively attached to the chassis 14 only by changing the orientation of the insulators 119 and 120 to 90 °. The operation of changing the performance (referring to the operation of selectively assembling the optical pickup units 38 and 138) is very simple.

In the insulators 119 and 120 of the present invention shown in FIGS. 1 to 5, the upper annular convex portion 181, the lower annular convex portion 182, and the intermediate annular concave portion 183 are formed in a circular shape. The annular convex portion 181, the lower annular convex portion 182, and the intermediate annular concave portion 183 are formed in a square shape such as a square shape, and the elevating frames 16, 116 and the elevating driving frames 23, 123 fitted on the outer periphery of the intermediate annular concave portion 183.
May be formed in a square shape such as a square shape.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made based on the technical concept of the present invention. For example, the disk drive device of the present invention is applicable to various disk drive devices that can record and / or reproduce various types of disks such as magnetic disks, optical disks, and magneto-optical disks.

[0051]

The insulator and the disk drive device of the present invention configured as described above have the following effects.

In the insulator according to the first aspect, a plurality of support members having different thicknesses can be selectively supported by a plurality of support portions having different thicknesses of one insulator constituted by an elastic member. Therefore, it is possible to use the insulator as a common component to elastically support a plurality of types of supported members having different thicknesses, and to easily change the model.

In the disk drive device according to the third and fourth aspects, the plurality of insulators constituted by the elastic members have different thicknesses, the spindle motor and the data pickup means are mounted, and the thicknesses are different. Since a plurality of base units can be selectively supported, it is possible to freely assemble a plurality of types of optical pickup units and the like, which are the heart of the disk drive device, into a chassis which is a common component.
Therefore, the cost of designing and manufacturing disk drive devices by model (performance) can be greatly reduced, and high-performance disk drive devices can be manufactured and sold at low prices.

[Brief description of the drawings]

FIG. 1 is an insulator to which the present invention is applied, showing a state in which two types of elevating frames having different thicknesses are elastically supported. FIG.

FIG. 2 is a plan view taken along the line CC of FIG. 1A.

FIG. 3 is a cross-sectional plan view taken along line DD in FIG. 1 (B).

FIG. 4 is a plan view of the same insulator with a set screw removed.

FIG. 5 is an exploded perspective view showing the insulator, the elevating frame and their set screws in the same.

FIG. 6 is a perspective view showing a high-performance optical pickup unit using a lifting frame and a lifting driving frame having a large thickness.

FIG. 7 is a plan view of the high-performance optical pickup of FIG. 6;

FIG. 8 is an exploded perspective view showing an insulator, an elevating frame, and their set screws incorporated in a conventional optical disc device.

FIG. 9 is a plan view of the insulator with a set screw removed.

FIG. 10 is a cross-sectional side view taken along the line EE in FIG. 9;

FIG. 11 is a cross-sectional side view taken along the line FF of FIG. 9;

12 is a cross-sectional side view taken along the line GG of FIG. 9;

FIG. 13 is a sectional side view showing a chucking state of an optical disk of a conventional optical disk device and an auto balancer incorporated in a disk table.

FIG. 14 is a cross-sectional side view showing the optical disc of FIG. 13 in a chucking released state;

FIG. 15 is a view for explaining the principle of the above-mentioned auto balancer.

FIG. 16 is a horizontal cross-sectional plan view illustrating movement of a ball when imbalance of the auto balancer is canceled.

FIG. 17 is a cross-sectional side view showing a state where loading of an optical disk of a conventional optical disk device is completed.

FIG. 18 is a cross-sectional side view for explaining unloading of an optical disk in a conventional optical disk device.

FIG. 19 is a partially cutaway plan view illustrating an optical pickup unit, a loading mechanism, and the like of a conventional optical disk device.

FIG. 20 is a perspective view illustrating the optical pickup unit of the above.

FIG. 21 is a side view of the optical pickup unit as viewed in the direction of arrows HH in FIG. 19;

FIG. 22 is a front view of the optical pickup unit as viewed from the direction of arrows II in FIG. 19;

FIG. 23 is a perspective view showing a state in which unloading of an optical disk is completed in a conventional optical disk device.

FIG. 24 is a perspective view showing a completed loading state of the optical disc of FIG. 23;

[Explanation of symbols]

1 is an optical disk which is a disk-shaped recording medium, 2 is a disk tray, 5 is an optical disk device which is a disk drive device, 14 is a chassis, 16 and 116 are lifting / lowering frames which are a supported member and a unit base, 119 and 120 are insulators, Reference numerals 21 and 22 denote set screws, reference numerals 23 and 123 denote lifting / lowering drive frames which are supported members, reference numerals 38 and 138 denote optical pickup units which are data pickup units, reference numeral 39 denotes a spindle motor, reference numeral 41 denotes an optical pickup which is a data pickup means, and reference numeral 181 denotes a data pickup means. Upper annular convex portions of the insulators 119 and 120, 182 are lower annular convex portions of the insulators 119 and 120, 183 are intermediate annular concave portions of the insulators 119 and 120, 188 and 18
9 is a groove-shaped part which is a support part of the insulators 119 and 120.

Claims (4)

[Claims] 1. An insulator formed by an elastic member, wherein a plurality of support portions having different thicknesses for selectively stably supporting a plurality of types of supported members having different thicknesses are integrally formed. Insulator. 2. A hollow substantially gourd-shaped body comprising an upper annular convex portion, a lower annular convex portion, and an intermediate annular concave portion formed integrally with the same axial center by an elastic member. An insulator for supporting a supported member on an outer periphery of an annular recess, wherein a pair of left and right support portions having different thicknesses for selectively stably supporting two types of the supported members having different thicknesses on the outer periphery of the intermediate annular recess. Characterized in that the insulators are shifted by approximately 90 °. 3. A disk drive device in which a unit base on which a spindle motor and data pickup means are mounted is elastically supported on a chassis by a plurality of insulators formed of elastic members, wherein the insulators have different thicknesses. A plurality of support portions having different thicknesses for selectively and stably supporting the unit base are integrally formed. 4. A disk drive device in which a unit base on which a spindle motor and data pickup means are mounted is elastically supported on a chassis by a plurality of insulators formed of elastic members, wherein the insulators are coaxial. An upper annular convex portion, a lower annular convex portion, and an intermediate intermediate concave portion formed therebetween are formed into a hollow substantially gourd shape by integrally molding. A disk drive device characterized in that a pair of left and right support portions having different thicknesses for selectively and stably supporting a unit base are shifted by approximately 90 °.