KR100750094B1 - Disk player, and turntable incorporating self-compensating dynamic balancer, clamper incorporating self-compensating dynamic balancer and spindle motor incorporating self compensating dynamic balancer adopted for disk player - Google Patents

Abstract

Disc disks having a self-compensating dynamic balancer and self-compensating balancer-integrated turntables and clampers and spindle motors are disclosed to suppress internal vibrations caused by eccentric mass of discs. This self-compensating balancer is installed in a member that is rotated by the spindle motor inside the disc player. It is preferably provided in the rotor of the turntable, clamper and / or spindle motor. The self-compensation type balancer includes a rotating plate and a rotating pendulum which is elastically pendulum mounted on the rotating plate. Therefore, when the disk is rotated, the rotating pendulum is offset in the direction against the eccentric mass so that the eccentricity can be canceled and the internal vibration resulting therefrom can be effectively suppressed.

Description

Disk player, and turntable incorporating self-compensating dynamic balancer, clamper incorporating self-compensating dynamic balancer and spindle employed in self-compensating balancer integrated turntable, self-compensating balancer integrated clamper and self-compensating balancer integrated spindle motor motor incorporating self compensating dynamic balancer adopted for disk player}

1 is a schematic exploded perspective view showing a conventional disc player.

Figure 2 is a schematic exploded perspective view showing a disc player according to an embodiment of the present invention.

3A to 3C are schematic views showing the positional relationship between the eccentric mass position of the disk and the rotational axis with respect to the revolution center according to the rotational speed of the disk.

Figure 4a is a perspective view showing a self-compensation balancer according to a first embodiment of the present invention.

4B and 4C show a deformable example of the elastic piece shown in FIG. 4A.

5 is a view showing a self-compensating balancer according to a second embodiment of the present invention.

6 is a view showing a self-compensating balancer according to a third embodiment of the present invention.

7 is a view showing a self-compensating balancer according to a fourth embodiment of the present invention.

8 is a view showing a self-compensating balancer according to a fifth embodiment of the present invention.

9 is a diagram showing a turntable employing a self-compensating balancer according to the first embodiment of the present invention.

10 is a diagram of a turntable employing a self-compensating balancer according to a second embodiment of the present invention.

11 is a diagram of a turntable employing a self-compensating balancer according to a third embodiment of the present invention.

12 is a diagram of a turntable employing a self-compensating balancer according to a fourth embodiment of the present invention.

13 is a diagram of a turntable employing a self-compensating balancer according to a fifth embodiment of the present invention.

14 is a view showing a clamper employing a self-compensating balancer according to a first embodiment of the present invention.

15 is a view showing a clamper employing a self-compensating balancer according to a second embodiment of the present invention.

16 is a view showing a clamper employing a self-compensating balancer according to a third embodiment of the present invention.

FIG. 17 illustrates a clamper employing a self-compensating balancer according to a fourth embodiment of the present invention. FIG.

18 is a view showing a clamper employing a self-compensating balancer according to a fifth embodiment of the present invention.

19 is a view showing a spindle motor employing a self-compensating balancer according to the first embodiment of the present invention.

20 illustrates a spindle motor employing a self-compensating balancer according to a second embodiment of the present invention.

21 is a view showing a spindle motor employing a self-compensating balancer according to a third embodiment of the present invention.

FIG. 22 is a view showing a spindle motor employing a self-compensating balancer according to a fourth embodiment of the present invention. FIG.

23 is a view showing a spindle motor employing a self-compensating balancer according to a fifth embodiment of the present invention.

24A and 24B are schematic views showing the positional relationship between the eccentric mass position of the disk and the rotational axis with respect to the revolution center according to the rotational speed of the disk of the disk player having the self-compensating balancer according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1 ... disc 100 ... spindle motor

200 ... turntable 300 ... clamper

Self-compensating balancer 410

413 ... the pendulum

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player, a turntable, a clamper and a spindle motor employed therein, and more particularly, a disc having a self-compensating dynamic balancer to suppress internal vibration caused by the eccentric mass of the disc. A player and a self-compensating balancer integrated turntable, a self-compensating balancer integrated clamper and a self-compensating balancer integrated spindle motor are employed.

In general, a disc player is a device that records or reproduces information on a recording medium such as a compact disc (CD), CD-ROM, or digital video disc (DVD) .It protects discs and optical pickup from external shock and internal vibration. Needs to be.

As shown in FIG. 1, a general disc player includes a deck base 10 hinged to a housing (not shown) and rotatably coupled in a vertical direction, and a deck plate 20 coupled to the deck base 10. And a spindle motor 21 installed on the deck plate 20 to provide rotational force to the disk 1, and a turntable 23 coupled to the rotation shaft 22 of the spindle motor 21 and on which the disk 1 is placed. And a clamper 40 installed on the upper inner surface of the housing to face the turntable 23 and clamping the disk 1 on the turntable 23 in the radial direction of the disk 1 on the deck plate 30. It is composed of an optical pickup 25 coupled to be transportable to perform a recording / reproducing operation.

The disc player is adapted to prevent the external vibration transmitted through the deck base 10 from being directly transmitted to the deck plate 20, the spindle motor 21, and the optical pickup 25. 20 is provided with a buffer member (30). The shock absorbing member 30 is made of a weak material such as soft rubber or polyurethane, which is capable of absorbing external shocks well.

The disk player provided as described above can effectively protect the driving of the disk 1 and the optical pickup 25 from external shock by employing the above-mentioned shock absorbing member 30. On the other hand, a method of mitigating internal vibration caused by the rotation of the spindle motor 21 by the eccentric mass of the disk has not been considered. Here, the disk eccentric mass is caused by a discrepancy between the rotational center of gravity and the center of gravity of the disk due to errors in the manufacturing process of the disk, and causes the rotational axis of the spindle motor to rotate by whirling.

The influence of the rotation of the spindle motor rotation is not a big problem in the low speed models such as 1x or 2x speed, but the high speed models such as 6x and 8x speed make the information recording and playback difficult. It is becoming.

In view of this, the disc player of the high speed model of the related art increases the mass of the deck plate on which the spindle motor is installed or increases the rigidity of the shock absorbing member so as to mitigate the movement of the deck plate due to the eccentric mass of the disc.

On the other hand, when the mass of the deck plate is increased, the effect is not sufficient at high speed rotation, and it becomes an obstacle of cost increase and miniaturization. When the rigidity of the shock absorbing member is increased, there is a disadvantage in that it does not effectively block vibration or shock transmitted from the outside.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has a first object to provide a disc player which can effectively suppress internal vibration caused by eccentric mass of a disc without increasing external vibration and increasing mass.

It is also a second object of the present invention to provide a self-compensating balancer integrated turntable employed in a disc player which is capable of suppressing internal vibration due to eccentric mass of the disc.

It is also a third object of the present invention to provide a self-compensating balancer integrated clamper employed in a disc player capable of suppressing internal vibrations caused by an eccentric mass of the disc.

It is a fourth object of the present invention to provide a self-compensating balancer-integrated spindle motor employed in a disc player capable of suppressing internal vibration caused by an eccentric mass of the disc.

Disc disk according to the present invention to achieve the first object, the spindle motor is installed on the deck plate to provide a rotational force to the disk, the turntable is installed on the rotation axis of the spindle motor and the disk, the turntable At least one of a clamper for clamping a disk placed on it, an optical pickup mounted on the deck plate to record and / or reproduce information on the disk, and a member rotated by a rotational force provided by the spindle motor. A disc player comprising a self-compensating balancer which is installed so that the center of gravity of the spindle motor is opposed to the center of gravity of the disc when the disc is rotated. One side is supported on the rotating plate to rotate the center of the supported side Elastically oscillate by, and is characterized in that it comprises a pivoting pendulum is displaced to be against the eccentric.

The self-compensating balancer integrated turntable employed in the disc player according to the present invention to achieve the second object is coupled to the rotating shaft of the spindle motor, and the seating member having a seating surface on which the disc is seated on the upper surface. ; A rotating plate coupled to and coaxially rotated with the seating member; It is characterized in that it comprises a rotating pendulum which is supported by one side to the rotating plate and is elastically pendulum movement about the supported side when rotated and is displaced against the eccentricity.

The self-compensating balancer integrated clamper employed in the disc player according to the present invention for achieving the third object includes: a clamper body for clamping a disc seated on a turntable and rotating together with the disc; A rotating plate provided on the clamper body; It is characterized in that it comprises a rotating pendulum which is supported by one side to the rotating plate and is elastically pendulum movement about the supported side when rotated and is displaced against the eccentricity.

A self-compensating balancer integrated spindle motor employed in the disc player according to the present invention for achieving the fourth object includes a rotating shaft rotatably fitted to a motor base; A stator fixed to the motor base; A rotor coupled to one end of the rotating shaft and rotating by electromagnetic action with the stator, the rotating plate being provided coaxially with the rotor and rotating together with the rotor; It is characterized in that it comprises a rotating pendulum which is supported by one side to the rotating plate and is elastically pendulum movement about the supported side when rotated and is displaced against the eccentricity.                     

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 2, a disc player according to an embodiment of the present invention includes a deck base 50, a deck plate 70 elastically coupled to the deck base 50, the deck base 50, and a deck plate 70. The buffer member 60 interposed therebetween, the spindle motor 100 installed on the deck plate 70, the turntable 200 and the optical pickup 75, and the turntable 200 are placed on the turntable 200. Clamper 300 for holding the disk (1), and the self-compensation balancer (400) which can suppress the revolving of the rotating shaft of the spindle motor 100 by the eccentric mass of the disk (1) It is configured by.

The deck plate 70 is weakly impacted by the shock absorbing member 60 from the outside of the deck base 50. To this end, the buffer member 60 is preferably composed of a material having a weak rigidity, for example, soft rubber or polyurethane so as to alleviate external vibration transmitted from the deck base 50. The spindle motor 100 provides a rotational force for rotating the disk (1). The turntable 200 has its center fixed on the rotation axis 130 of the spindle motor 100 and the disk 1 is placed on its upper surface during operation. The clamper 300 clamps the disk 1 placed on the turntable 200 to prevent flow. The turntable 200 is fixed on the rotation shaft 130 to be rotated by the spindle motor 100, and thus the disk 1 and the clamper 300 also rotate together.

3A to 3C, the positional relationship between the eccentric mass position of the disk and the rotational axis with respect to the revolution center according to the rotational speed of the disk is as follows.

Figure 3a is a schematic diagram showing the revolution and rotational motion of the disk, when the rotational speed of the spindle motor is less than the natural frequency of the deck plate. Here, the natural frequency is determined by the elastic modulus of the buffer member 60 and the mass of the members installed on the deck plate 70 and the deck plate 70, the frequency in parallel with the disk, that is, in the horizontal direction Say. As shown, when there is an unbalanced mass of the disk, i.e., an eccentric mass me, at the position p1 spaced a predetermined distance from the rotation center c1 of the disk 1, the rotation center c1 of the disk is the orbital center ( c) is displaced to c2, c3, and c4 as the origin, and the revolution motion is performed. The eccentric mass me position of the disk corresponding to each of the rotation centers c2, c3 and c4 is displaced to the p2, p3 and p4 positions. At this time, the positions p1, p2, p3, and p4 of the revolving center c and the eccentric mass me of the disk 1 are mutually based on the rotation centers c1, c2, c3 and c4 of the disk 1, respectively. It is placed in the opposite position.

Figure 3b is a schematic diagram showing the revolution and rotational motion of the disk when the rotational speed of the spindle motor rotation axis is similar to the natural frequency of the deck plate. As shown, the revolving center c and the positions p1, p2, p3, p4 of each of the eccentric centers c and the eccentric mass of the disc 1 are perpendicular to each of the centers of rotation of the disc c1, c2, c3, c4. .

Figure 3c is a schematic diagram showing the revolution and rotational motion of the disk when the rotational speed of the spindle motor rotation axis is greater than the natural frequency of the deck plate. The normal rotational speed of the disc capable of recording / reproducing information on the disc corresponds to the normal rotational speed of the disc and the eccentric mass position p1 of the disc and the center of revolution of the disc (c1, c2, c3, c4), respectively. p2, p3, and p4 are each located in the same direction.

In the relation between the center of revolution and the eccentric mass of the disk, the self-compensating balancer (400 in FIG. 2) is eccentric of the disk by being displaced in a direction against the eccentric mass, i.e., in a balance direction by inertia during rotation. It is to reduce the.

The self-compensated balancer 400 is at least any one of the rotor, the rotation shaft 130, the turntable 200 and the clamp 400 of the spindle motor 100 is rotated by the rotational force provided from the spindle motor 100. It can be installed in one member.

As shown in FIG. 4A, the first embodiment of the self-compensated balancer 400 includes a rotating plate 410 rotating around the rotating shaft 411 and elastically pendulum mounted on the rotating plate 410. A plurality of rotating pendulums 413 are configured. Each rotating pendulum 413 includes a support part 413a fixed to the pivoting plate 410 and a pendulum part 413c connected to the support part 413a to be elastically pendulum-moved by an elastic piece 413b. The plurality is arranged symmetrically on the rotating plate (410). The elastic piece 413b may be formed in various forms, in order to facilitate the pendulum movement of the pendulum portion 413c, it is preferable that the bending stiffness is not too large. For example, by injecting a nylon-based resin has a single type (412b) or a plurality of elastic pieces (413b ') as shown in Figure 4a or 4b to connect the support portion 413a and the pendulum portion 413c, Alternatively, it may be connected using a string (413b ") that is not easily broken as shown in Fig. 4c. In the case of using the string (413b"), the string (413b ") does not rotate because there is no force sustaining the shear force. Although the pendulum portion 413c is in an arbitrary position, when the rotation of the rotating plate 410 starts, the pendulum portion 413c is moved to its position by centrifugal force, and reference numeral 412 denotes a cover for protecting the rotating pendulum 420. .

In the above configuration, when the rotating plate 410 installed in at least one of the members rotated by the spindle motor 100 is rotated, the pendulum portion 413c of the rotating pendulum 413 is supported by the support portion 413a. With the pendulum movement centered on the), it is biased to a position against the eccentric mass (me). In other words, the pendulum portion 413c of the pivoting pendulum 413 is biased in the direction to cancel the eccentricity generated during rotation to reduce the eccentricity. The pendulum portion 413c may also be made by molding a resin or the like. If the pendulum portion 413c is light enough to offset the eccentric mass, a material having a high specific gravity such as metal may be inserted into the resin to increase the mass.

The self-compensating balancer may be configured as in the second embodiment shown in FIG. In this embodiment, one supporting portion 423a is installed on the rotating shaft 421 of the rotating plate 420, and the integrated rotating pendulum 423 having all the pendulum portions 423c connected to each other by the elastic piece 423b. It is started. This can simplify the number of parts and the assembly labor than the configuration of the above-described first embodiment, and the action of canceling the eccentricity is the same. Reference numeral 422 denotes a cover.

6 shows a self-compensating balancer according to a third embodiment of the present invention. In this embodiment, the rotating pendulum 433 is installed on the rotating plate 430, and the auxiliary rotating pendulum 434 is further installed on the rotating pendulum 433. The auxiliary rotating pendulum 434 also has a supporting part 434a fixed to the rotating pendulum 433 and a pendulum part 434c connected to the supporting part 434a by an elastic piece 434b. The elastic piece 434b of 434 may also be formed in various forms as shown in FIGS. 4A to 4C. Although the present embodiment also has the same effect of reducing the eccentricity, since the rotating pendulum 433 and the auxiliary rotating pendulum 434 simultaneously pendulum movement, the eccentric offset effect has a greater advantage. Reference numeral 432 denotes a cover, and reference numeral 431 denotes a rotation axis.

FIG. 7 illustrates a fourth embodiment in which the auxiliary rotation pendulum is arranged in a different form. If the third embodiment is such that the rotation pendulum and the auxiliary rotation pendulum are arranged at different heights, the present embodiment is an auxiliary rotation pendulum 444. ) Is connected in series with the rear end of the rotating pendulum 443, and is disposed at substantially the same height. Accordingly, as the rotary pendulum 443 and the auxiliary rotating pendulum 444 rotate in series with each other, the eccentricity is offset.

8 illustrates a fifth embodiment in which the rotating pendulum 453 and the auxiliary rotating pendulum 454 are disposed at substantially the same height. Here, the hollow 453c is disposed in the pendulum portion 453c of the rotating pendulum 453. ') Is formed and the auxiliary rotating pendulum 454 is disposed in the hollow 453c'. Therefore, in order to increase the eccentric offset effect, the auxiliary rotating pendulum may be installed in addition to the rotating pendulum in various forms as described above.

Next, a self-compensating balancer integrated turntable according to the present invention will be described. The turntable is configured to reduce the eccentricity during rotation by integrally provided with the self-compensating balancer as described above, the effect is as described above.                     

First, FIG. 9 shows a turntable according to the first embodiment of the present invention.

Referring to the drawings, a mounting member 210 on which a disk (not shown) is mounted is rotatably coupled to the rotation shaft 130 of the spindle motor 100. Then, the rotating plate 211 is installed on the coaxial shaft of the seating member 210, a plurality of rotating pendulums having a support portion (212a), elastic piece (212b), pendulum portion (212c) on the rotating plate (211) 212) is elastically installed pendulum movement. Therefore, if the eccentric mass is present when the turntable rotates, the rotating pendulum 212 offsets the eccentricity by biasing it in a direction opposite thereto. The elastic piece 212b may be deformed as shown in FIGS. 4B and 4C.

10 shows a turntable according to a second embodiment of the present invention. In this embodiment, the rotating plate 221 is installed on the coaxial axis of the seating member 220, and one support portion 222a is installed on the rotary shaft boss 221a, and then a plurality of pendulum portions 222c on the support portion 222a. It is provided with an integral rotary pendulum 222 connected to the elastic piece (222b). The action of canceling the eccentricity is the same as in the first embodiment.

11 shows a self-compensating balancer integrated turntable according to a third embodiment of the present invention. In this embodiment, the rotating pendulum 232 is installed on the rotating plate 231 coaxially with the seating member 230, and the auxiliary rotating pendulum 233 is further installed on the rotating pendulum 232. The auxiliary rotating pendulum 233 also includes a support part 233a fixed to the rotating pendulum 232 and a pendulum part 233c connected to the support part 233a by the elastic piece 233b. The elastic piece 233b of the auxiliary pivoting pendulum 233a may also be formed in another form as shown in FIGS. 4B and 4C. Although the present embodiment also has the same effect of reducing the eccentricity, since the rotating pendulum 232 and the auxiliary rotating pendulum 233 simultaneously perform the pendulum movement, the eccentric offset effect has a greater advantage.

Fig. 12 shows the turntable of the fourth embodiment in which such auxiliary pivoting pendulum is arranged in another form. In this embodiment, the rotating pendulum 242 is installed on the rotating plate 241 coaxially mounted with the seating member 240, and the auxiliary rotating pendulum 243 is connected in series to the rear of the rotating pendulum 242, thereby substantially. It is placed at the same height.

FIG. 13 illustrates a turntable according to a fifth embodiment. In this embodiment, a rotating pendulum 252 is installed on a rotating plate 251 coaxial with the seating member 250 to enable pendulum movement, and the rotating pendulum The auxiliary rotating pendulum 253 is disposed at the same height in the hollow 252a formed in the pendulum portion 252.

As such, in order to increase the eccentric offset effect, the auxiliary rotating pendulum may be installed in addition to the rotating pendulum in various forms as described above.

Next, the self-compensating balancer integrated clamper 300 according to the present invention will be described. As shown in FIG. 2, the self-compensating balancer integrated clamper 300 according to the present invention is positioned on the turntable 200 by a bracket 301 coupled with the deck base 50 to the turntable 200. The seated disk 1 is clamped and rotated together with the disk 1 in a clamped state.

Referring to FIG. 14, the self-compensating balancer integrated clamper 300 according to the first embodiment of the present invention includes a clamper main body 310 for clamping a disk (not shown) mounted on the turntable 200, and a coaxial phase thereof. It is configured to include a rotating plate 311 and a rotating pendulum 313 installed in the. The rotating pendulum 313 includes a support 313a, an elastic piece 313b, and a pendulum portion 313c, and when an eccentric mass is present when the clamper body 310 rotates, the rotating pendulum 313 The pendulum portion 313c is offset in the opposite direction to cancel the eccentricity. The elastic piece 313b may be modified as shown in FIGS. 4B and 4C.

15 shows a clamper according to a second embodiment of the present invention. In this embodiment, the support part 323a is installed on the rotary shaft boss 321a of the rotating plate 321 provided coaxially with the clamper main body 320, and the plurality of pendulum parts 323c on the support part 323a by the elastic piece 323b. ) Has a configuration of an integrated rotary pendulum 323. The action of canceling the eccentricity is the same as in the first embodiment. Reference numeral 322 denotes a cover.

16 shows a self-compensating balancer integrated clamper according to a third embodiment of the present invention. In this embodiment, the rotating pendulum 333 is installed on the rotating plate 331 coaxially with the clamper main body 330, and the auxiliary rotating pendulum 334 is further installed on the rotating pendulum 333. The auxiliary rotating pendulum 334 also includes a pendulum portion 334c connected to the support portion 334a by a resilient piece 334b on a support portion 334a fixed to the rotation pendulum 333. The elastic piece 334b of the auxiliary pivoting pendulum 334 may also be formed in another form as shown in FIGS. 4B and 4C. In this embodiment, the action of reducing the eccentricity is the same, but since the rotating pendulum 333 and the auxiliary rotating pendulum 334 simultaneously perform the pendulum movement, the eccentric offset effect has a greater advantage. Reference numeral 332 denotes a cover.                     

Fig. 17 shows the clamper of the fourth embodiment in which such auxiliary pivoting pendulum is arranged in another form. In this embodiment, the rotating pendulum 343 is installed on the rotating plate 341 coaxially with the clamper main body 340 to enable pendulum movement, and the auxiliary rotating pendulum 344 is connected in series at the rear of the rotating pendulum 343. This is arranged at substantially the same height. Reference numeral 342 denotes a cover.

FIG. 18 shows a clamper according to the fifth embodiment. In this embodiment, a hollow 353a is formed in the rotating pendulum 353, and the auxiliary rotating pendulum 354 is disposed in the hollow 353a. . Reference numeral 350 denotes a clamper body, and reference numeral 352 denotes a cover.

As such, in order to increase the eccentric offset effect, the auxiliary rotating pendulum may be installed in addition to the rotating pendulum in various forms as described above.

Next, the self-compensating balancer integrated spindle motor employed in the disc player according to the embodiment of the present invention will be described in detail.

Self-compensating balancer integrated spindle motor 100 according to the present invention is installed on the deck plate 70, as shown in Figure 2, and rotates the turntable 200 coupled on the rotary shaft 130 .

Referring to FIG. 19, the spindle motor 100 according to the first embodiment of the present invention is rotatable to the motor base 110 and the motor base 110 coupled to the deck plate (70 of FIG. 2). One end of the rotating shaft 130 is fixed through the stator 140 and the fixing member 133 which are provided with the rotating shaft 120 and the coil part 141 fixed to the motor base 110. The rotor 130 is rotated by an electromagnetic action with the coil part 141 of the stator 140 by having a magnet 131 on the inner wall, and the rotary shaft boss 151 coupled to the end of the fixing member 133. It comprises a rotating plate 150 which is integrally coupled to the rotor 130, and the rotating pendulum 152 is installed on the rotating plate 150 to be elastically pendulum movement.

The rotating pendulum 152 includes a support part 152a, an elastic piece 152b, and a pendulum part 152c, and when an eccentric mass exists when the rotor 130 rotates, the rotating pendulum 152 The pendulum portion 152c is offset in the opposite direction to cancel the eccentricity. The elastic piece 152b may be modified as shown in FIGS. 4B and 4C.

20 shows a spindle motor according to a second embodiment of the present invention. In this embodiment, the support 162a is installed on the rotary shaft boss 161 of the rotating plate 160, and the integrated pendulum 162 in which the plurality of pendulum parts 162c are connected to the support 162a by the elastic piece 162b. Has the configuration. The action of canceling the eccentricity is the same as in the first embodiment.

21 shows a self-compensating balancer integrated spindle motor according to a third embodiment of the present invention. In this embodiment, the rotating pendulum 172 is installed on the rotating plate 170, and the auxiliary rotating pendulum 173 is further installed on the rotating pendulum 172. The auxiliary rotating pendulum 173 also includes a support 173a fixed to the rotating pendulum 172 and a pendulum portion 173c connected to the support 173a by the elastic piece 173b. The resilient piece 173b of the auxiliary rotating pendulum 173 may also be formed in other forms as shown in FIGS. 4B and 4C. In this embodiment, the action of reducing the eccentricity is the same, but the rotating pendulum 172 and the auxiliary rotating pendulum 173 simultaneously pendulum movement, the eccentric offset effect has a greater advantage. Reference numeral 171 denotes a rotating shaft boss coupled to the fixing member 133.

Fig. 22 shows the spindle motor of the fourth embodiment in which such auxiliary pivoting pendulum is arranged in another form. In this embodiment, the rotating pendulum 182 is installed on the rotating plate 180 so as to be elastically pendulum-movable, and the auxiliary rotating pendulum () is connected in series at the rear of the rotating pendulum 182 and disposed at substantially the same height. .

FIG. 23 illustrates a spindle motor according to the fifth embodiment. In the present embodiment, a hollow 192a is formed in a rotating pendulum 192 that is elastically pendulum-moved to the rotating plate 190, and the hollow 192a. The auxiliary rotating pendulum 193 is disposed at substantially the same height in the quadrature.

As such, in order to increase the eccentric offset effect, the auxiliary rotating pendulum may be installed in addition to the rotating pendulum in various forms as described above.

Hereinafter, referring to FIGS. 24A and 24B, a disc player employing a self-compensating balancer according to the present invention and a rotating member integrated with a self-compensating balancer, that is, a turntable 200, a clamper 300, and a spindle motor ( The vibration reduction effect during the operation of the rotor 100 will be described.

When the rotation speed of the disk 1 is less than the natural frequency, as shown in FIG. 24A, the position (pi, i = 1, 2, 3, 4) of the eccentric mass me of the disk 1, the rotating plate and the rotation The center of gravity of the self-compensating balancer including the pendulum, that is, the position of the compensation mass me '(p'i, i = 1,2,3,4) is the axis of rotation (ci, i = 1,2,3,4). It is located on the side opposite to the resonance center (c) with reference to). Therefore, the resonance radius of the rotating shaft is increased. However, the actual disc drive takes place faster than this rotation speed.

On the other hand, when the number of rotations of the disk is considerably larger than the natural frequency, substantially when the disk is rotated at the normal speed, as shown in FIG. 24B, the resonance center c and the disk 1 are referred to the rotation axis. Eccentric mass (me) position (pi, i = 1, 2, 3, 4) of) is located on the same side, the position of the compensation mass (me ') (p'i, i = 1, 2, 3, 4) Is located on the opposite side by centrifugal force. Therefore, the unbalance due to the eccentric mass me of the disk 1 is canceled, and the resonance radius of the rotating shaft is greatly reduced, and the internal excitation force of the deck plate due to the eccentric mass me of the disk 1 is alleviated.

As described above, the disk player, the spindle motor, and the member rotated by the spindle motor according to the present invention include a self-compensating balancer that is elastically pendulum-driven during rotation, so that the balancer is placed on the eccentric mass when the disk is rotated. By offsetting the eccentricity in the opposite direction, it is possible to effectively suppress the vibration generated by the rotation of the disk.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible. .

Claims (28)

A spindle motor installed on the deck plate to provide rotational force to the disk, a turntable mounted on the rotating shaft of the spindle motor, on which the disk is placed, a clamper to clamp the disk on the turntable, and installed on the deck plate, An optical pickup for recording and / or reproducing information on a disk and at least one of the members rotated by the rotational force provided by the spindle motor, the weight of which is about the axis of rotation of the spindle motor when the disk is rotated. A disc player comprising a self-compensating balancer whose center is positioned against the center of gravity of the disc, The self-compensation balancer, Rotating plate, and a rotating pendulum which is supported on one side of the rotating plate and is elastically pendulum-moved about the one side of the rotating plate and displaced against the eccentricity, A disc player, characterized in that it comprises an auxiliary rotating pendulum which is supported by the rotating pendulum to elastically pendulum movement about the supported side when rotating. The method of claim 1, The rotating pendulum includes a support portion fixed to the rotating plate, and a pendulum portion elastically connected to the support portion by a predetermined elastic piece. The method of claim 2, And the rotating pendulum is characterized in that a plurality of pendulum portions are symmetrically connected to the support portion. delete The method of claim 1, And the auxiliary rotating pendulum is arranged in a plurality of layers at different heights from the rotating pendulum. The method of claim 1, And the auxiliary rotatable pendulum is arranged in series at substantially the same height as the rotatable pendulum. The method of claim 1, A hollow is formed in the rotating pendulum, and the auxiliary rotating pendulum is disposed in the hollow. A seating member coupled to a rotating shaft of the spindle motor and rotating, the seating member having a seating surface on which a disk is seated; A rotating plate coupled to and coaxially rotated with the seating member; A rotating pendulum which is supported on one side of the rotating plate and is elastically pendulum-moved about the supported side when rotated and displaced against an eccentricity; And, The self-compensating balancer integrated turntable employed in the disc player, characterized in that it comprises an auxiliary rotating pendulum which is supported by the rotating pendulum and elastically pendulum movement about the supported side when rotating. The method of claim 8, The rotating pendulum includes a support part fixed to the rotating plate, and a pendulum part elastically connected to the support part by a predetermined elastic piece. The self-compensating balancer integrated turntable employed in the disc player. The method of claim 9, The rotating pendulum is a self-compensating balancer integrated turntable employed in a disc player, characterized in that a plurality of pendulum portions are symmetrically connected to the support portion. delete The method of claim 8, The auxiliary rotating pendulum is a self-compensating balancer integrated turntable employed in a disc player, characterized in that it is arranged in a double layer at a different height from the rotating pendulum. The method of claim 8, The auxiliary rotating pendulum is a self-compensating balancer integrated turntable employed in a disc player, characterized in that arranged in series at substantially the same height as the rotating pendulum. The method of claim 8, The rotating pendulum is formed with a hollow, the auxiliary rotating pendulum is a self-compensating balancer integrated turntable employed in the disc player, characterized in that disposed in the hollow. A clamper body for clamping the disk seated on the turntable and rotating with the disk; A rotating plate provided on the clamper body; A rotating pendulum which is supported on one side of the rotating plate and is elastically pendulum-moved about the supported side when rotated and displaced against an eccentricity; And, Self-compensating balancer integrated clamper is employed in the disc player, characterized in that it comprises an auxiliary rotating pendulum which is supported by the rotating pendulum and elastically pendulum movement about the supported side when rotating. The method of claim 15, The rotating pendulum includes a support part fixed to the rotating plate, and a pendulum part elastically connected to the support part by a predetermined elastic piece, wherein the self-compensating balancer integrated clamper is adopted. The method of claim 16, The rotating pendulum is a self-compensating balancer integrated clamper employed in a disc player, characterized in that a plurality of pendulum portions are symmetrically connected to the support portion. delete The method of claim 15, The auxiliary rotating pendulum is a self-compensating balancer integrated clamper employed in a disc player, characterized in that it is arranged in a double layer at a different height from the rotating pendulum. The method of claim 15, The auxiliary rotating pendulum is self-compensating balancer integrated clamper employed in the disc player, characterized in that arranged in series at substantially the same height as the rotating pendulum. The method of claim 15, The rotating pendulum is formed with a hollow, the auxiliary rotating pendulum is self-compensating balancer integrated clamper employed in the disc player, characterized in that disposed in the hollow. A rotating shaft rotatably fitted to the motor base; A stator fixed to the motor base; A rotor coupled to one end of the rotating shaft and rotating by electromagnetic action with the stator; A rotating plate provided coaxially with the rotor and rotating together with the rotor; A rotating pendulum which is supported on one side of the rotating plate and is elastically pendulum-moved about the supported side when rotated and displaced against an eccentricity; And, Self-compensating balancer integrated spindle motor is adopted in the disc player, characterized in that it comprises an auxiliary rotating pendulum elastically pendulum movement about the supported side when one end is supported by the rotating pendulum. The method of claim 22, The rotating pendulum includes a support part fixed to the rotating plate, and a pendulum part elastically connected to the support part by a predetermined elastic piece, wherein the self-compensating balancer integrated spindle motor is adopted. The method of claim 23, wherein The rotating pendulum is a self-compensating balancer integrated spindle motor employed in a disc player, characterized in that a plurality of pendulum portions are symmetrically connected to the support portion. delete The method of claim 22, The auxiliary rotating pendulum is a self-compensating balancer integrated spindle motor employed in the disc player, characterized in that it is arranged in a double layer at a different height from the rotating pendulum. The method of claim 22, The auxiliary rotating pendulum is a self-compensating balancer integrated spindle motor employed in the disc player, characterized in that arranged in series at substantially the same height as the rotating pendulum. The method of claim 22, The rotating pendulum is formed with a hollow, the auxiliary rotating pendulum is a self-compensating balancer integrated spindle motor employed in the disc player, characterized in that disposed in the hollow.

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