JP2001263422A - Insulator and disk drive - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the downward deflection of an insulator when an optical disk device is used in a perpendicular condition without increasing the resonance frequency of the whole insulator. SOLUTION: A pair of right and left ribs which are integrated with the right and left sides of the periphery of an upper annular projecting portion 181, a lower annular projecting portion 182 and an intermediate annular recessed portion 183 of the insulators 19, 20 and parallel to the axes thereof are formed in wide ribs 184 having the thickness T2 of 2-3 mm, and a cut portion 188 substantially orthogonal to the longitudinal direction thereof is formed in an intermediate portion in the vertically longitudinal direction of the pair of right and left wide ribs 184.

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. 15 to 28 as an optical disk device which is an example of a disk drive device. First, as shown in FIG. 25, 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 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. Then, when the eject button 7 of the front panel 60 is pressed after 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.

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. 19 to 21, a loading mechanism 27 is mounted on an upper portion of the front end side of the bottom 14 a of the chassis 14. 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. 25 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 the arrow c, and the lifting drive frame 23 raises the lifting frame 16 via the insulator 20 from the inclined position 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 rotated 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
19, the disk tray 2 is moved downward from the raised position shown in FIG. 19 to the lowered position shown in FIG. 20 around the pair of left and right insulators 19 in the direction of arrow d. It is pushed out in the direction of the arrow b from the loading position inside 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.

Therefore, as shown in FIG. 16, after the optical disk 1 is horizontally loaded into the disk device main body 6 by the disk tray 2 from the direction of the arrow a, 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. 16 and 20, 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.

Recently, as shown in FIGS. 15 to 18, 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. 17A, 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 rotation speed ω of the motor shaft 39a is higher than the critical speed ωc, as shown in FIG. 17B, a plurality of balls 73 move in the hollow annular portion 72 to the center of gravity of the optical disk 1. 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. 18A shows an unbalanced cancel state of the center of gravity of the optical disc 1 with the maximum eccentricity (the 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. 18B 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 equally distributed around the center of gravity G in the hollow annular portion 72. At a position spread at an angle of.

As shown in FIGS. 8 to 14, the lifting frame 16 which is a supported member and constitutes a unit base of an optical pickup unit 38 on which a spindle motor 39 and an optical pickup 41 are mounted.
4 conventional insulators 19, 20 supporting
Is shown in detail.

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. And this insulator 1
The maximum diameter D of the upper annular protrusion 81 and the lower annular protrusion 82 of 9 and 20 is configured to be about 9 mm, the height H is configured to be about 8 mm, and the rib thickness T ₁ which is the thickness of the pair of right and left ribs 84. Is 1 mm or less.

As described with reference to FIGS. 19 to 24, the pair of left and right insulators 19 attached to the left and right sides of the rear end portion 16a of the elevating frame 16, as shown in FIGS. the fitting hole 91 formed in 16 with fitted in the outer periphery of the intermediate annular recess 83, substantially equal width T of the pair of ribs 84 and rib thickness T ₁ formed in the left and right sides of the fitting hole 91 _The lifting frame 16 is elastically sandwiched between the upper annular convex portion 81 and the lower annular convex portion 82 by being inserted into a pair of left and right rib grooves 92. Then, in a state where the lower opening 86 of the insulator 19 is inserted and positioned on the outer periphery of a screwing boss 93 which is integrally formed on the chassis 14 and protrudes, the set screw 21 composed of a stepped screw is inserted into the insulator. 19 into the upper opening 87, and the set screw 2
The large diameter step 102 on the lower surface of the screw head 101 is fitted into the inner periphery of the upper opening 87, and the large diameter step 102 of the set screw 21 is fitted.
Is inserted through the inside of the pair of left and right convex portions 85 inside the insulator 19, and the set screw 21
A small diameter male screw 104 at the lower end of the screw is screwed into a female screw 94 formed at the center of the screwing boss 93 to fasten the small diameter shaft portion 103 of the set screw 21 on the screwing boss 93. And the upper annular convex portion 81 of the insulator 19 is pressed down from above by the large-diameter screw head 101 of the set screw 19.

As described with reference to FIGS. 19 to 24,
A pair of left and right insulators 20 attached to the left and right sides of the front end 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 22 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 22 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 22 is connected to the insulator 2.
0, and the small-diameter male screw 104 at the lower end of the set screw 22 is screwed into the female screw 94 formed at the center of the screw boss 93. By fastening, the small-diameter shaft portion 103 of the set screw 22
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 22.

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]

By the way, in this kind of optical disk device 5, as shown in FIGS.
A rotary 4 is provided at four locations on the outer periphery of the recess 3 of the disc tray 2.
As shown in FIGS. 25 and 26, when the optical disk device 5 is used in a horizontal state, the four disk pressing portions 3 a are released to the outside of the recess 3 when the optical disk device 5 is used horizontally. Thereby, the horizontal insertion and removal of the optical disk 1 into and from the recess 3 can be performed smoothly. Then, as shown in FIGS. 27 and 28, when the optical disk device 5 is used upright so that one of the left and right side surfaces thereof is directed downward, these four disk pressing portions 3a are recessed. By rotating the optical disk 1 vertically into the recess 3, the optical disk 1 is held by the four disk holding portions 3a, and the optical disk 1 is held in the vertical state by the disk tray 2 by the disk tray 2. It can be moved in and out in the directions of arrows a and b. However, as shown in FIGS. 25 and 26, the conventional insulators 19 and 20 are developed exclusively for horizontal use in which the optical disk device 5 is used in a horizontal state, and shown in FIGS. 27 and 28. As described above, when the optical disk device 5 is used in a vertical state in which one of the right and left side surfaces thereof is directed downward, the following problem occurs.

That is, the conventional insulators 19 and 20
As shown in FIGS. 8 to 14, a pair of right and left ribs 84 having a thin rib thickness T1 of ₁ mm or less is fitted into a pair of left and right rib grooves 92 on both right and left sides of the fitting hole 91, so-called rotation. When the optical disk device 5 is used horizontally, the vertical load W _{1 of the} lifting frame 16 applied to the insulators 19 and 20 having a small resonance frequency f ₀ is required as shown in FIGS. 10, 12 and 13. And the horizontal load W ₂ ,
The upper annular convex portion 81, the lower annular convex portion 82, and the intermediate annular concave portion 83 can be received all around.

However, when the optical disk device 5 shown in FIGS. 11 and 14 is used vertically, the vertical load W ₁ is particularly increased by the upper annular convex portion 81, the lower annular convex portion 82 and the intermediate annular concave portion 8.
3, the upper annular convex portion 81, the lower annular convex portion 82, and the intermediate annular concave portion 83 have a large downward bending amount δ. Then, as shown in FIG.
15 is vertically loaded by the disk tray 2 and vertically chucked by the disk table 40 shown in FIG. There is a problem that serious inconvenience such that the lowermost point of the outer circumference of the optical disc 1 comes into contact with the lowermost point of the inner circumference of the recess 3 of the disc tray 2 easily occurs.

Therefore, these insulators 19, 2
The rib thickness T ₁ of the left and right sides of the ribs 84 of 0 to thicker than 1 mm, the upper annular protrusion 81 when the vertical use of the optical disk device 5, downward deflection of the lower annular protrusion 82 and the intermediate annular recess 83 A method of reducing the amount δ is conceivable, but if this is done, the resonance frequency f ₀ of these insulators 19 and 20 as a whole increases, and the movement of the plurality of balls 73 of the auto balancer 71 in the hollow annular portion 72 is poor. This causes a new problem that it is difficult to cancel the imbalance of the center of gravity of the optical disc 1.

Further, these insulators 19, 20
When the rib thickness T ₁ of the left and right sides of the rib 84 of the result in thicker than 1 mm, the resonance frequency f ₀ of the total of these insulators 19 and 20 is significantly larger when using the horizontal than when used vertically of the optical disk apparatus 5 To get rid of
In the optical disk device 5 without the auto balancer 71, the resonance frequency f _{0 of the} insulators 19 and 20 greatly changes due to the difference in attitude during use depending on whether the optical disk device 5 is used horizontally or vertically. There is an adverse effect such that external vibrations are easily applied to 41 and internal vibrations are easily transmitted to the outside. Therefore, it is not preferable that the resonance frequency f _{0 of the} insulators 19 and 20 greatly changes due to a difference in posture when the optical disk device 5 is used.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and it is an object of the present invention to reduce the amount of downward bending of an insulator when a disk drive device is used vertically without increasing the resonance frequency of the entire insulator. The purpose is to provide something that can be done.

[0030]

An insulator according to the present invention for achieving the above object has an upper annular convex portion, a lower annular convex portion integrally formed coaxially with an elastic member, and a gap between the upper annular convex portion and the lower annular convex portion. And a pair of ribs parallel to the axial direction are integrally formed on at least both sides of the outer periphery of the upper annular projection and the lower annular projection and the intermediate annular recess. In the insulator configured to support the supported member on the outer periphery of the intermediate annular concave portion, the rib thickness of at least one pair of ribs is 1 mm.
The rib is formed as described above, and a cut portion substantially perpendicular to the length direction is formed at a substantially middle portion in the length direction of these ribs.

The insulator of the present invention configured as described above has an upper annular convex portion and a pair of ribs integrally formed on at least both sides of the outer periphery of the lower annular convex portion and the intermediate annular concave portion in parallel with the axial direction thereof. Since the rib thickness is increased to 1 mm or more, the amount of downward bending of the insulator during vertical use of a disk drive device or the like can be reduced. In addition, since a cut portion substantially perpendicular to the length direction is formed at a substantially intermediate portion in the length direction of the pair of ribs, the resonance frequency of the entire insulator can be suppressed low.

[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.
The same components as those in FIGS. 8 to 28 are denoted by the same reference numerals, and the description thereof will not be repeated.

That is, the lifting frame 16 of the present invention is used.
The four insulators 19 and 20 that elastically support the optical disc 1 with respect to the chassis 14 and the lifting drive frame 23 have the same shape and size as in the related art, and the center of gravity of the optical disc 1 by the auto balancer 71 described above. In order to make it easy to cancel the imbalance of the rubber, a very small resonance frequency f ₀ of the insulators 19 and 20 is used, such as rubber or a block copolymer elastomer (TPEE) made of nylon 12 and polyether. It is formed by a soft elastic member. And these insulators 19 and 20 are coaxial P
An upper annular convex portion 181 and a lower annular convex portion 182 integrally formed in an _eleven shape, and an intermediate annular concave portion 183 therebetween form a hollow substantially gourd shape. A pair of wide ribs 184 parallel to their axes are integrally formed at the left and right sides of the outer periphery of the upper annular projection 181, the lower annular projection 182, and the intermediate annular recess 183. A pair of left and right convex portions 185 are integrally formed on the inner periphery of the. A lower opening 186 and a lower opening 187 are formed at a lower end of the lower annular convex portion 182 and an upper end of the upper annular convex portion 181. And the maximum diameter D of the upper annular convex part 181 and the lower annular convex part 182 of these insulators 19 and 20 is comprised about 9 mm, and height H is comprised about 8 mm.

The insulators 19, 2 of the present invention
0 is 1 mm for the rib thickness T ₂ of the pair of left and right wide ribs 184.
As described above, the width is preferably set to a width of 2 to 3 mm, and is a substantially middle portion in the vertical length direction of the pair of left and right wide ribs 184, for example, a boundary between the lower annular convex portion 182 and the intermediate annular concave portion 183. Some of these wide ribs 184
Only a cut portion 188 such as a slit is formed by cutting only a portion in a direction substantially orthogonal to the length direction.

Then, as described above, the lifting frame 1
6 and lifting drive frame 23 fitting hole 91 formed in when fitted to the outer periphery of the intermediate annular recess 83 of these insulators 19 and 20, the rib thickness T ₂ is thick pair of the wide ribs 184 fit its approximately equal pair of ribs groove width T ₂ and rib thickness T ₂ which is formed on the left and right sides of Goana 91 92
The insulators 19 and 20 are inserted into the chassis 14 and the lifting frame 1 by set screws 21 and 22.
6 on top.

Accordingly, the insulators 19, 2 of the present invention
0, the rib thickness T2 of the pair of left and right wide ribs 184 is configured to be thicker than 1 mm such as ₂ to 3 mm. As shown in FIG. 7, the vertical load W ₁ of the lifting frame 16 is changed in the same manner as in the prior art by the upper annular convex portion 181 having a small resonance frequency f ₀ of the insulators 19 and 20, the lower annular convex portion 182 and the intermediate annular concave portion. 18
3 is received only in a region about half of the upper side, in which case the upper annular convex portion 181 and the lower annular convex portion 18
2 and the outer peripheral portions of the intermediate annular concave portion 183 are reinforced by the wide ribs 184 having a large rib thickness T _2, so that these upper annular convex portions 181 and approximately half of the upper side of the lower annular convex portions 182 and the intermediate annular concave portion 183 are provided. The amount of downward bending of the region portion can be extremely reduced.

That is, since the pair of left and right ribs of the insulators 19 and 20 are formed as the wide ribs 184, even when the resonance frequency f ₀ of these insulators 19 and 20 is small, the optical disk device 5 can be used vertically. , The amount of downward bending of these insulators 19 and 20 can be reduced. Accordingly, the amount of downward displacement of the optical disk 1 that is vertically chucked on the disk table 40 and is driven to rotate at a high speed while being vertical by the spindle motor 39 can be suppressed to a small value. A serious inconvenience that the lowermost point of the optical disc device 2 contacts the lowermost point of the inner circumference of the recess 3 of the disk tray 2 can be prevented beforehand, and high reliability of the optical disk device 5 can be realized.

Still further, since a cut portion 188 such as a slit is formed at a substantially middle portion of the pair of left and right wide ribs 184 of the insulators 19 and 20 in the vertical length direction, the upper annular convex portions of these insulators 19 and 20 are formed. The part 181 and the lower annular convex part 182 are a pair of left and right wide ribs 1.
It is possible to smoothly bend in the axial direction and in a direction perpendicular to the axial direction with almost no restriction on the bending by 84, so that the resonance frequency f ₀ of these insulators 19 and 20 as a whole is kept to a very low level. be able to.

Therefore, when the optical disk device 5 is used horizontally as shown in FIGS. 25 and 26, as shown in FIGS. 3 and 5, and when the optical disk device 5 is used vertically as shown in FIGS. 27 and 28, FIGS. As shown in FIG. 7, these insulators 19 and 20 can reliably absorb external vibrations in the horizontal and vertical directions. Since the resonance frequency f ₀ of these insulators 19 and 20 is kept small, the above-mentioned auto balancer 71
The movement of the plurality of balls 73 in the hollow annular portion 72 can be improved so that the imbalance of the center of gravity of the optical disc 1 can be reliably canceled, and the external vibration generated during recording and / or reproduction of the optical disc 1 can be improved. Skipping of a sound, a video, or the like, can be prevented.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made based on the technical concept of the present invention. For example, in the embodiment described above, a pair of left and right wide ribs 184 of the insulators 19 and 20 are provided. However, three or four wide ribs 184 may be provided on the outer circumference of the insulators 19 and 20 at equal intervals. Further, the disk drive device of the present invention is applicable to various disk drive devices capable of recording and / or reproducing various types of disks such as magnetic disks, optical disks, and magneto-optical disks.

[0041]

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 present invention, the rib thickness of a pair of ribs integrally formed in parallel with the axial direction on at least both sides of the outer periphery of the upper annular convex portion, the lower annular convex portion, and the intermediate annular concave portion is set to 1 mm or more. Since the thickness is increased, the amount of downward bending of the insulator during vertical use of a disk drive device or the like can be suppressed to a small value. Since the resonance frequency of the insulator as a whole can be suppressed to be low by forming a cut portion, the amount of downward displacement of the supported member when the supported member is vertically supported can be reduced. In addition to this, external vibrations can be reliably absorbed in both cases where the supported member is supported horizontally and vertically.

According to a second aspect of the present invention, there is provided a disk drive device comprising: an upper annular convex portion of a plurality of insulators elastically supporting a unit base on which a spindle motor and data pickup means are mounted; and outer periphery of a lower annular convex portion and an intermediate annular concave portion. The rib thickness of a pair of ribs integrally formed on at least both sides in parallel with the axial direction is increased to 1 mm or more, so that the amount of downward bending of the insulator during vertical use of a disk drive device or the like can be reduced. In addition, a cut portion substantially perpendicular to the length direction is formed at a substantially middle portion in the length direction of the pair of ribs, so that the resonance frequency of the entire insulator can be suppressed to be small. When the device is used vertically, it is chucked vertically by the spindle motor and is driven to rotate and rotate. A serious inconvenience such that the amount of downward displacement of the driven optical disk or the like becomes large and the lowest point of the outer circumference of the optical disk or the like contacts the lowest point of the inner circumference of the concave portion of the disk tray. In addition to preventing external vibrations from being transmitted to the unit base, skipping of sounds and images can be prevented, and internal vibrations can be transmitted to the outside. It can be prevented beforehand.

According to a third aspect of the present invention, there is provided an insulator for elastically supporting a unit base on which a plurality of balls are rotatably incorporated in a hollow annular portion and a spindle motor and data pickup means. The rib thickness of a pair of ribs integrally formed in parallel with the axial direction on at least both sides of the outer periphery of the upper annular convex portion and the lower annular convex portion and the intermediate annular concave portion is increased to 1 mm or more. The amount of downward bending of the insulator during vertical use can be reduced, and a cut portion substantially perpendicular to the length direction of the pair of ribs is formed at a substantially intermediate portion in the length direction of the pair of ribs. The overall resonance frequency can be kept low. In any case at the time and vertical use, to improve the movement of the ball within the hollow annular portion of the auto-balancer, reliably perform the cancellation of the unbalance of the center of gravity of the optical disk or the like.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an insulator, an elevating frame, and a set screw thereof incorporated in an optical disc apparatus to which the present invention is applied.

FIG. 2 is a plan view of FIG. 1 from which set screws are removed.

FIG. 3 is a cross-sectional side view taken along the line AA of FIG. 2, showing a state where the lifting frame is supported by the insulator when the optical disc apparatus is used horizontally.

FIG. 4 is a cross-sectional side view similar to FIG. 3, showing a state of the optical disc device when used vertically.

FIG. 5 is a cross-sectional side view taken along the line BB of FIG. 2 showing a state where the lifting frame is supported by the above-described insulator when the optical disc apparatus is used horizontally.

FIG. 6 is a cross-sectional side view taken along the line CC of FIG. 3, showing a state where the lifting frame is supported by the insulator when the optical disc apparatus is used horizontally.

7 is a cross-sectional side view similar to FIG. 6 when the optical disk device is used vertically.

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 FIG. 8 with the set screw removed.

FIG. 10 is a cross-sectional side view taken along the line DD of FIG. 9 and showing a supporting state of the lifting frame by the insulator when the optical disc apparatus is used horizontally.

FIG. 11 is a cross-sectional side view similar to FIG. 10 and showing a state of the optical disc device when used vertically.

FIG. 12 is a cross-sectional side view taken along the line EE in FIG. 9 showing a state where the lifting frame is supported by the insulator when the optical disc apparatus is used horizontally.

FIG. 13 is a cross-sectional side view taken along the line FF of FIG. 10 and showing a state where the lifting frame is supported by the insulator when the optical disc apparatus is used horizontally.

FIG. 14 shows the optical disc apparatus in vertical use.
It is a sectional side view similar to.

FIG. 15 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. 16 is a sectional side view showing the optical disc of FIG. 15 in a chucking released state;

FIG. 17 is a view for explaining the principle of the above-mentioned auto balancer.

FIG. 18 is a horizontal cross-sectional plan view illustrating movement of a ball when imbalance of the auto balancer is canceled.

FIG. 19 is a cross-sectional side view showing a state where loading of an optical disk of a conventional optical disk device is completed.

FIG. 20 is a cross-sectional side view illustrating unloading of an optical disk in a conventional optical disk device.

FIG. 21 shows a spindle motor of a conventional optical disk device;
FIG. 2 is a partially cutaway plan view illustrating an optical pickup, a loading mechanism, a sled moving mechanism, a lifting frame, a lifting drive frame, an insulator, and the like.

FIG. 22 is a perspective view illustrating a spindle motor, an optical pickup, a sled moving mechanism, an elevating frame, an elevating drive frame, an insulator, and the like in the embodiment.

FIG. 23 is a side view of the lifting frame as viewed in the direction of arrows GG in FIG. 22;

FIG. 24 is a front view of the lifting frame as viewed from the direction of arrows HH in FIG. 22;

FIG. 25 is a perspective view showing a state in which unloading of an optical disc is completed when the conventional optical disc apparatus is used horizontally.

26 is a perspective view showing a state where loading of the optical disc of FIG. 25 is completed.

FIG. 27 is a perspective view showing a state in which unloading of an optical disc is completed when the conventional optical disc apparatus is used vertically.

28 is a perspective view of the optical disk of FIG. 27 in a state where loading is completed.

[Explanation of symbols]

1 is an optical disk which is a disk-shaped recording medium, 2 is a disk tray, 3 is a recess of the disk tray 2, 5 is an optical disk device which is a disk drive device, 14 is a chassis,
Reference numeral 16 denotes a lifting frame constituting a unit base which is a supported member, 19 and 20 denote insulators, 21 and 2,
2 is a set screw, 23 is an elevating drive frame which is a supported member, 39 is a spindle motor, 40 is a disk table, 41 is an optical pickup which is a data pickup means, 53 is a disk clamper, 71 is an auto balancer, and 181 is an insulator 19 , 20 an upper annular convex portion, 182 a lower annular convex portion of the insulators 19 and 20, 183 an intermediate annular concave portion of the insulators 19 and 20, 184 a wide rib, 186 a lower opening, 187 an upper opening, and 187 a cutting portion. It is.

Claims (3)

[Claims] 1. A hollow substantially gourd-shape formed by an upper annular convex portion, a lower annular convex portion, and an intermediate annular concave portion formed therebetween by an elastic member integrally coaxially. An annular projection, a pair of ribs parallel to the axial direction thereof are integrally formed on at least both sides of an outer periphery of the lower annular projection and the outer periphery of the intermediate annular recess, and a supported member is supported on the outer periphery of the intermediate annular recess. Wherein the rib thickness of the at least one pair of ribs is formed to be 1 mm or more, and a cut portion substantially perpendicular to the longitudinal direction is formed at a substantially intermediate portion in the longitudinal direction of these ribs. Insulator featured. 2. A disk drive device in which a unit base on which a spindle motor and a data pickup means are mounted is elastically supported by a plurality of insulators, wherein the insulator is integrally formed with an elastic member so as to have the same axial center. An annular convex portion, a lower annular convex portion, and an intermediate annular concave portion therebetween are formed into a hollow substantially gourd shape, and the upper annular convex portion, the lower annular convex portion, and the outer periphery of the intermediate annular concave portion are formed. A pair of ribs parallel to these axial directions are integrally formed on at least both sides, and the unit base is supported on the outer periphery of the intermediate annular recess. The rib thickness of the at least one pair of ribs is set to 1 mm or more. A cut portion substantially perpendicular to the length direction is formed at a substantially middle portion in the length direction of these ribs. Disk drives equipment. 3. A disk drive device in which a plurality of balls are rollably incorporated in an annular groove and a unit base on which a spindle motor and data pickup means are mounted is elastically supported by a plurality of insulators. In the above, the insulator is formed in a substantially gourd-shaped hollow shape by 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; A pair of ribs parallel to the axial direction are integrally formed on at least both sides of the outer periphery of the upper annular protrusion, the lower annular protrusion, and the intermediate annular recess, and the unit base is supported by the outer periphery of the intermediate annular recess. The rib thickness of the at least one pair of ribs is formed to be 1 mm or more, and a substantially middle portion in the longitudinal direction of these ribs is formed. Disk drive apparatus characterized by forming the cut portions substantially perpendicular to their length direction.