JP2000083346A - Balance correcting apparatus and rotating apparatus provided therewith - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable balance correction satisfactory in reproducibility and accuracy by reducing the weight of a balance correcting apparatus itself. SOLUTION: A traveling path 36, constituted of an annular space whose section is rectangular, is formed between the lower surface of a base part 34b of a turn table 34 as a first part member and an annular gutter 35 as a second part member. In the travel path 36, a plurality of spherical bodies 37 are accommodated movably in the radial direction and in the peripheral direction, thereby constituting a balance correcting apparatus 48. By using a first elastic body 43 and a second elastic body 44, the balance correcting apparatus 48 is supported swingably in the radial direction. Due to the effect of both the elastic bodies 43, 44 and the frictional force due to a first and a second sliders 45, 46, the balance correcting apparatus 48 is so supported that it rotates interlocked with a motor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balance correcting device which is attached to a rotating device such as a motor and corrects imbalance during rotation, and a rotating device including the same.

[0002]

2. Description of the Related Art Conventionally, a recording disk drive motor, which is a rotating device, is configured as shown in FIG. 2, for example.
This recording disk is freely exchanged for use with a CD-ROM.

As shown in FIG. 2, a lower end of a substantially cylindrical holding member 2 is fitted into an opening formed in a fixing member 1 such as a chassis, and a bottom opening of the holding member 2 is closed by a closing plate 3. The thrust bearing 4 is placed on the obstruction plate 3 and closed at the bottom of the holding member 2, and the slide bearing 5 is fitted inside the holding member 2.

[0004] Further, a core 7a is fitted to the outside of the holding member 2, and a winding 7b is wound around the core 7a to form a stator 7a.
Is composed. Further, the shaft 8 is fitted into the slide bearing 5, the lower end thereof is in contact with the thrust receiver 4, and the upper end thereof is disposed so as to protrude above the holding member 2. A hub member 9 made of a non-magnetic material such as aluminum is provided at the upper end of the shaft 8.
The yoke member 10 which is a rotating member made of a magnetic material such as iron is attached to the hub member 9.

The yoke member 10 comprises a substantially disk-shaped base portion and a hanging portion which is integrally formed by hanging downward on the periphery of the base portion, and is provided around an opening formed in a central portion of the base portion. The portion is attached to the lower end of the hub member 9 by caulking. Further, a driving magnet 11 is fitted inside the hanging portion of the yoke member 10 and is disposed at a position facing the stator 7.

As shown in FIG. 2, a turntable portion 13 is formed outside the hub member 9, and a clamp magnet 14 is embedded in the center of the hub member 9 so as to form substantially the same surface as the upper surface. This clamp magnet 1
By 4, the disk pressing means (not shown) of the drive unit is magnetically attracted, and the recording disk D is fixed. Then, the direction of current flow to the winding 7b of the stator 7 is controlled, and the stator 7 generates a rotating magnetic field. By repeating the attraction and repulsion of the rotating magnetic field and the static magnetic field with the driving magnet 11, the stationary magnetic field is stopped. The driving magnet 11, the yoke member 10, the hub member 9 and the shaft 8 rotate with respect to the stator 7 in the state, whereby the turntable portion 13 and the recording disk D rotate in a certain direction.

On a recording disk D such as a CD-ROM, various printings are made on the surface opposite to the recording surface, and the weight balance during rotation of the recording disk D due to the weight of ink used for printing. Bias (unbalance)
May occur, which may cause rotational fluctuation of the motor. This is due to the fact that even a small amount of ink weight has an effect due to the above-mentioned high-speed motor. In addition, with the spread of CD-ROM, a bad shape is also included, and this may cause rotational shake.

Therefore, it has been practiced to mount a balance correcting device for correcting such imbalance on a rotating member of a motor. Conventionally, the balance correction device is shown in FIG.
As shown in FIG.
The lower surface of the base 3 and the base of the yoke member 10 form a housing portion 16 of an annular space, and a plurality of spheres 17 are housed in the housing portion 16 so as to be movable in the circumferential direction.

According to such a configuration, the recording disk D
When the motor reaches a predetermined rotation speed in a state where is mounted, each sphere 17 moves to a position symmetrical to the unbalance position, and the unbalance of the motor is corrected by each sphere 17 to prevent rotational vibration. You can. However, conventionally, although the amount of unbalance can be corrected to some extent by moving each sphere 17, since each sphere 17 may not be able to move to a position where the unbalance is corrected due to friction or the like that hinders free movement, It is difficult to correct even a small amount of imbalance. That is, each sphere 1
No. 7 could not be moved to an appropriate unbalance correction position, and sometimes shifted irregularly due to friction or the like, and there was a problem that reproducibility was poor. On the other hand, when the motors are balanced, the respective spheres 17 should maintain a positional relationship in which the respective spheres 17 themselves do not cause imbalance, and should be in a state of being arranged at equal intervals, for example. However, there was also a problem that it was not located there and disrupted the balance. still,
Reproducibility refers to the degree to which the same result is obtained when the motor is repeatedly started and stopped under the same conditions.

[0010]

Therefore, in order to improve the accuracy of the conventional balance correction device, various measures have been studied. For example, as described in JP-A-10-83622, when a motor is fixed to an apparatus via an insulator (hereinafter, referred to as a flexible support), what is the reproducibility of the motor? investigated. this is,
By limiting the target portion (in this case, the motor portion on the insulator) where vibration should be suppressed, the weight of the sphere can be reduced, and each sphere can be easily moved. In this case, the sensitivity acting on is improved to improve the balance accuracy and sensitivity.

However, with respect to the disk D which is the source of the unbalance and which is the original object of the unbalance correction, the movable portion still supported by the insulator is added to the disk D, the yoke member 10 and the turntable portion. The rotating parts such as 13 and the non-rotating parts such as the holding member 2 and the stator 7 are combined, so that the weight is larger than each sphere and the balance adjustment is difficult. As a result, no remarkable improvement was observed in the reproducibility described above, and no significant improvement in accuracy was realized. In addition, to reduce the frictional resistance between the surfaces of the spheres and their abutting surfaces (inside the housing), in order to smooth the movement of each sphere, the desired accuracy was not obtained in any case. Was.

SUMMARY OF THE INVENTION An object of the present invention is to reduce the weight of the balance correcting device itself and to perform highly accurate balance correction with better reproducibility.

[0013]

In order to solve the above-mentioned problems, a balance correction device according to the present invention comprises a first member,
A second member forming a moving path formed of an annular space between the first member and the first member; and a balance member housed in the moving path so as to be movable at least in a circumferential direction. The second member is characterized by being supported by an elastic body so as to be swingable in a radial direction with respect to the rotating member and to rotate in conjunction with the rotating member.

According to this structure, the first and second members forming the moving path for accommodating the balance member are supported by the elastic member so as to be swingable in the radial direction with respect to the rotating member. Thus, the weight of the balance correction device including these two members and the balance body in the moving path can be reduced. And
Only the balance correction device can be easily reduced in weight,
Moreover, the so-called flexible support of the balance correction device with respect to the rotating member allows for even small vibrations compared to a conventional balance correction device that is integrated into a rotation device such as a motor. It becomes possible to correct a smaller unbalance amount in a sensitive manner.

At this time, the elastic body to be used is preferably an annular hollow or solid body made of rubber or the like, and may have a rectangular or oval cross section. Therefore, a general O-ring can be used easily. Further, the elastic body may be formed by arranging a plurality of rubber pieces at predetermined intervals.

Further, the balance correcting device according to the present invention is characterized in that the first and second members are supported by a plurality of the elastic members at a plurality of positions in a rotation axis direction of the rotating member.

According to such a configuration, since the first and second members are supported at a plurality of positions in the rotation axis direction of the rotating member, the first and second members can be more stably supported. it can.

Further, in the balance correction device according to the present invention, the elastic body may be formed between an outer peripheral surface or an inner peripheral surface of the rotating member and an inner peripheral surface or an outer peripheral surface of at least one of the first and second members. It is characterized by being interposed between them.

By doing so, the first and second members can be supported to be rotatable in the radial direction with respect to the rotating member,
In addition, the first and second members can be supported so as to rotate in conjunction with the rotating member by the frictional force between the elastic body and the first and second members and the rotating member.

Further, the balance correcting device of the present invention is characterized in that the elastic body has a ring shape.

In this case, since the elastic body has a ring shape, the handling thereof is very easy, and the efficiency of the assembling work can be improved.

Further, a rotating device provided with the balance correcting device of the present invention comprises a stationary member and a rotating member rotatably provided with respect to the stationary member, wherein a first member and the first member are provided. A second member forming a moving path composed of an annular space between the second member and a balance body which is accommodated in the moving path so as to be movable at least in the circumferential direction. An elastic body that supports the first and second members so as to swing freely in the radial direction and rotate in conjunction with the rotating member is provided. An example of the rotating device is a small precision motor such as a recording disk driving motor.

According to such a structure, only the balance correcting device can be reduced in weight, and the balance correcting device is softly supported on a rotating member of a rotating device such as a motor, so that minute vibration can be reduced. Thus, it is possible to provide a rotating device capable of correcting a smaller amount of unbalance in a sensitive manner.

Further, in the rotating device provided with the balance correcting device according to the present invention, the first and second members are supported at a plurality of positions in the rotation axis direction of the rotating member by the plurality of elastic bodies. Features.

With this arrangement, it is possible to provide a rotating device that can more stably support the first and second members and can correct a smaller amount of imbalance.

Further, in the rotating device provided with the balance correcting device of the present invention, the elastic body includes an outer circumferential surface or an inner circumferential surface of the rotating member and at least one of the inner circumferential surface or the inner circumferential surface of the first or second member. It is characterized by being interposed between the outer peripheral surface.

By doing so, the first and second members can be supported so as to be swingable in the radial direction with respect to the rotating member,
Moreover, the frictional force between the elastic body and the first and second members 2 and the rotating member can support the first and second members 2 so as to rotate in conjunction with the rotating member. A rotation device capable of correcting the amount can be provided.

[0028] Further, the rotating device provided with the balance correcting device of the present invention is characterized in that the elastic body has a ring shape.

In this case, since the elastic body has a ring shape, its handling becomes very easy, the efficiency of the assembling work can be improved, and a smaller unbalance amount can be corrected. A rotating device can be provided.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. This embodiment is an example of a recording disk drive motor as a rotating device provided with a balance correction device, and FIG. 1 is a sectional view thereof.

In FIG. 1, 21 is a fixing member such as a chassis, 22 is a holding member as a substantially cylindrical stationary member having a lower end fitted in an opening 23 formed in the fixing member 21, and 24 is a holding member. A closing plate 25 for closing the bottom opening of the bottom plate 22; a thrust receiver 25 mounted on the closing plate 24 and disposed at the bottom of the holding member 22; 26 a sliding bearing;
It is fitted inside the holding member 22.

Further, in FIG. 1, reference numeral 28 denotes a stator as a stationary member, which comprises a core 28a fitted on the outside of the holding member 22, and a winding 28b wound on the core 28a. Reference numeral 29 denotes a sliding bearing 26, the lower end of which is in contact with the thrust receiver 25 and the upper end of which is the holding member 2
A shaft 30 protruding upward from 2 is a back iron as a rotating member.

The back iron 30 is made of a magnetic material such as iron, and has a substantially disc-shaped base 30a and a base 30a.
And a boss portion 30c at the center of the base portion 30a.
The shaft 29 penetrates and is fitted into the shaft 29. Further, a stepped portion 30 d is formed in the periphery of the base portion 30 a so as to be recessed inside the back iron 30.

In FIG. 1, reference numeral 32 denotes a driving magnet which is fitted inside the hanging portion 30b of the back iron 30 and is disposed at a position opposed to the stator 28. Reference numeral 33 denotes a shaft 29 provided in a through hole of a central boss portion. The small disk-shaped support member 34 fixed to the upper end of the shaft 29 by fitting
Is a turntable as a first member, and 35 is an annular gutter as a second member having a U-shaped cross section.

The turntable 3 as the first member
Reference numeral 4 denotes a circular base portion 34b having a through hole 34a having a diameter larger than the diameter of the shaft 29 at the center, and a cylindrical boss portion 34 bulging upward around the through hole 34a and integrally formed.
c, and a lower part 34d which is formed integrally with the lower part of the lower surface of the base part 34b by lowering it near the periphery. Here, the inner diameter of the boss portion 34c is set to be larger than the outer diameter of the support member 33.

The peripheral edge of the through hole 34a is formed slightly thicker on the lower surface side of the base 34b, and between the thickened portion and the hanging portion 34d, an annular gutter 35 is formed with its opening upward. A moving path 36 having an annular space with a rectangular cross section is formed between the annular gutter 35 and the lower surface of the base 34b of the turntable 34, and a plurality of balancing bodies are formed in the moving path 36 as balance bodies. A sphere 37 made of a steel ball or the like is accommodated, and each sphere 37 moves in the moving path 36 in the radial direction and the circumferential direction. It is desirable that the range in which the sphere 37 occupies the moving path 36 is approximately half the circumference of the moving path 36.

Further, in FIG. 1, reference numeral 39 denotes a ring-shaped back yoke made of a magnetic material such as iron inserted into the inside of the boss portion 34c of the turntable 34 without contacting the support member 33; The clamp magnet 41 disposed so as to form substantially the same surface as the upper surface of the boss portion 34c is a disk rubber, which is provided on the peripheral edge of the upper surface of the base 34b of the turntable 34, and is provided on the disk rubber 41. A recording disk such as a CD-ROM is placed, and a disk pressing means (not shown) of the drive unit (not shown) is magnetically attracted by the clamp magnet 40 so that the recording disk is fixed.

In FIG. 1, reference numeral 43 denotes an annular first member made of rubber or the like having a rectangular cross section interposed between the inner peripheral surface of the boss portion 34c of the turntable 34 and the outer peripheral surface of the support member 33.
44 is an annular second elastic body made of rubber or the like having a circular cross section interposed between the inner peripheral surface of the lower end of the hanging portion 34d of the turntable 34 and the outer peripheral surface of the step portion 30d of the back iron 30. , 45 are ring-shaped first sliding members made of elastic rubber or the like interposed between the upper surface of the support member 33 and the lower surface of the back yoke 39, and 46 is a ring-shaped first member made of elastic rubber or the like. The second sliding contact body is interposed between the upper surface of the base 30a of the back iron 30 and the lower surface of the annular gutter 35.

Then, the turntable 34 and the annular gutter 3
5, the movement path 36 and each sphere 37 constitute a balance correction device 48, and the first and second elastic members 43 and 44 support the balance correction device 48 so as to be able to swing in the radial direction. These two elastic bodies 43 and 44 and both sliding contact bodies 45 and 4
The balance correction device 48 is supported so as to rotate in conjunction with a rotating member such as the motor shaft 29 and the back iron 30 without slipping by the frictional force of the motor 6.

Next, the operation of the motor when the recording disk CD-ROM is mounted will be described.

First, if the motor is unbalanced due to printing on the surface of the recording disk or the like, it is necessary to wait until the motor exceeds the resonance frequency that resonates with the natural frequency of the motor mounted with the recording disk after the motor starts. In the meantime, each sphere 37 tends to move on the moving path 36 on the extension of the center of rotation and the center of gravity of the disk, which further worsens the vibration.
Therefore, the motor is in an unbalanced rotation state.

At a rotational speed exceeding the resonance rotational speed,
In the motor on which the recording disk is mounted, each sphere 37 accommodated in the moving path 36 is arranged at a position where the imbalance is canceled with respect to the rotation center. At this time, the unbalance amount of the rotating members including the recording disk becomes zero, and unnecessary centrifugal force does not act on the rotating shaft of the motor, and the center of rotation, the center line of the shaft 29, and the center of gravity of the motor match. The rotating member rotates stably.

At this time, since the balance correcting device 48 is unitized and has a structure separated from each component of the motor, the balance can be adjusted so as to be specialized for the disk portion which is a source of unbalance. In addition, since the balance correcting device 48 can be reduced in weight, the balance adjustment sensitivity is increased, and compared to the conventional balance correcting device integrally incorporated in a rotating device such as a motor, the balance correcting device 48 can reduce vibration. This makes it possible to correct a smaller amount of unbalance by reacting sensitively. For example, several thousand CD-ROMs (3.5 inch size)
In the case of rotating at a rotation speed of rpm, the conventional method could only correct the imbalance amount up to about 1 g · cm.
According to the configuration as described above, a smaller value, 0.2
It has been verified that an imbalance amount up to about g · cm can be corrected.

The reason is that the balance correction device 48 is provided with the recording disk and the balance correction device 4 so that the balance can be corrected specifically for the disk that is the source of the unbalance.
8, the balance sensitivity can be improved because the balance can be corrected at an unbalanced position (here, the recording disk). Compared to the case in which all the rotating members including the disk are provided, only the portion (here, the recording disk) that requires balance correction is provided, so that the target portion of the balance adjustment is reduced in weight and the balance adjustment sensitivity is high. Each sphere 37 is now sensitive to the reaction, and the balance correction device 48 is supported by an elastic body against imbalance. It is presumed that this is because the sphere 37 moved more sensitively, and the balance correction function worked effectively.

In the case where the motor is in a normal state regardless of printing on the surface of the recording disk or the like, after the motor is started, the motor is driven until the resonance frequency which resonates with the natural frequency of the motor mounted with the recording disk is exceeded. During this time, as in the case described above, the spheres 37 are concentrated at one location so as to expand the vibration, and the motor rotates in an unstable manner. However, at a rotational speed exceeding the resonance rotational speed, each sphere 37 moves on the moving path 36.
For example, the spheres 37 move and distribute at positions where no imbalance occurs, for example, at substantially equal intervals, and the motor rotates stably.

Therefore, according to the above-described embodiment, only the balance correcting device 48 can be easily reduced in weight.
In addition, the balance correction device 48 for the rotating member of the motor
The so-called flexible support makes it possible to respond more sensitively to minute vibrations and to achieve a smaller unbalance compared to a conventional balance correction device integrated into a rotating device such as a motor. Can be corrected, and the reproducibility is improved.

The balance correction device 4 is provided at a plurality of positions in the rotation axis direction by the first and second elastic members 43 and 44.
8, the balance correction device 48 can be supported more stably.

In the above-described embodiment, the balance correction device 48 is supported by the first and second elastic members 43 and 44 at a plurality of positions in the rotation axis direction so as to be swingable in the radial direction. The case where the balance correction device 48 is supported so as to rotate in conjunction with a rotating member such as the back iron 30 of the motor by the frictional force of the second sliding members 45 and 46 has been described. If the balance correction device 48 can be supported by the frictional force so that the balance correction device 48 rotates in conjunction with a rotating member such as the back iron 30 of the motor, the two sliding contacts 4
It is not necessary to provide 5, 46.

If only one elastic member can support the balance correction device 48 so as to be able to swing in the radial direction and rotate in conjunction with the rotating member, only one elastic member needs to be provided. .

Further, in the above-described embodiment, the recording disk drive motor as a rotating device having the balance correcting device has been described as an example. However, since the balance correcting device 48 is unitized, the balance correcting device 48 alone is used. However, the invention holds. However, the configuration of the balance correction device at that time is not limited to the configuration shown in FIG. 1, but includes at least first and second members, and a moving path for housing the balance body is formed by these two members. The correction device itself may be flexibly supported by the elastic member with respect to the mounted portion.

Although the above embodiment has been described with reference to the case where the number of moving paths is one, for example, the moving path 3 shown in FIG.
A plurality of moving paths may be formed by, for example, partitioning the partition 6 by a partition member, and a balance body such as a sphere may be accommodated in each of the moving paths. At this time, the diameter and number of each moving path, and the diameter and number of each sphere accommodated in each moving path may be appropriately set according to the shape of a rotating device such as a motor or the amount of imbalance to be corrected. For example, even if a small mass is arranged on the inner moving path and a larger mass is arranged on the outer moving path, or the movable amount of the sphere is changed by changing the width of the moving path. This often makes it possible to further improve the unbalance correction accuracy.

Further, in order to improve the accuracy of correcting imbalance in consideration of durability, use environment, etc., each sphere 37 has a small specific gravity such as ceramic, rubber, plastic or the like in addition to the above-mentioned steel ball. A metal material may be used.

Further, a soft material may be provided on the surface of each metal sphere 37, so that even if the spheres collide with each other, it is difficult for the collision sound to be generated and the noise accompanying the collision is prevented. Can be. For example, a steel ball has a double structure in which resin is coated, or rubber itself is a soft material if it is a rubber ball.

Further, in the above-described embodiment, the case where the balance body is a sphere 37 has been described. However, the balance body does not necessarily need to be a sphere, but may be another rolling body, a fluid such as a liquid, or a semi-fluid. The structure may be such that the balance body does not enter the adjacent moving path,
In addition, it is sufficient that the balance body can move in the respective moving paths in the circumferential direction, so that the same effect as that of the above-described embodiment can be obtained. It is possible to provide a silent motor without generation.

The elastic body is not limited to the one shown in FIG. 1. The cross-sectional shape may be circular, rectangular, or elliptical. Specifically, a general O-ring can be easily used. It can be used. Further, the elastic body may be formed by arranging a plurality of rubber pieces at predetermined intervals.

Further, in the above embodiment, the shaft 2
Although the case where the present invention is applied to a motor of a type in which the rotating member 9 rotates has been described, it is needless to say that the present invention can also be applied to a motor of a type having a fixed shaft. In addition, any member can be used as long as it can support the first and second members via the elastic member with respect to the rotating member.

Further, the present invention can be applied not only to the motor as in the above-described embodiment, but also to any rotating device which has a rotating member and can cause imbalance during rotation. Is possible.

Furthermore, the present invention is not limited to the above-described embodiment, and various changes other than those described above can be made without departing from the gist of the present invention.

[0059]

As described above, according to the first aspect of the present invention, only the balance correcting device can be easily reduced in weight, and the balance correcting device is softly supported on the rotating member. Compared with the conventional balance correction device integrated into a rotating device such as a motor, it is possible to compensate for a smaller unbalance amount by responding more sensitively to minute vibrations. And the reproducibility is good. You.

According to the second aspect of the present invention, since the first and second members are supported at a plurality of positions in the rotation axis direction of the rotating member, the support of the first and second members is more stable. You can do it.

According to the third aspect of the present invention, the first and second members can be supported to be rotatable in the radial direction with respect to the rotating member. By the frictional force between the second member and the rotating member, the first and second members 2 can be supported so as to rotate in conjunction with the rotating member.

According to the fourth aspect of the present invention, since the elastic body has a ring shape, the handling thereof becomes very easy, and the efficiency of the assembling work can be improved.

Further, according to the fifth aspect of the present invention, there is provided a rotating device which is sensitive to minute vibrations and can correct a smaller unbalance amount and has good reproducibility. be able to.

According to the sixth aspect of the present invention, the first and second members can be supported more stably.
A rotating device capable of correcting a smaller amount of unbalance can be provided.

According to the seventh aspect of the present invention, the member of the first member 2 can be supported so as to rotate in conjunction with the rotating member, and a smaller unbalance amount can be corrected. A possible rotation device can be provided.

According to the eighth aspect of the present invention, the handling becomes very easy, the efficiency of the assembling work can be increased, and the rotation which can correct a smaller unbalance amount can be achieved. An apparatus can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 Reference Signs List 22 holding member (stationary member) 28 stator (stationary member) 30 back iron (rotating member) 34 turntable (first member) 35 annular gutter (second member) 36 moving path 37 sphere (balanced member) 43 first Elastic body 44 Second elastic body 48 Balance corrector

Claims (8)

[Claims] 1. A first member, a second member forming a moving path comprising an annular space between the first member and the first member, and a balance housed in the moving path so as to be movable at least in a circumferential direction. The first and second members are supported by an elastic body so as to be swingable in a radial direction with respect to a rotating member and to rotate in conjunction with the rotating member. A balance correction device. 2. The balance correction device according to claim 1, wherein the first and second members are supported by a plurality of the elastic members at a plurality of positions in a rotation axis direction of the rotation member. . 3. The elastic body is interposed between an outer peripheral surface or an inner peripheral surface of the rotating member and at least one of an inner peripheral surface or an outer peripheral surface of the first or second member. The balance correction device according to claim 1, wherein 4. The balance correction device according to claim 1, wherein the elastic body has a ring shape. 5. A moving member comprising a stationary member and a rotating member rotatably provided with respect to the stationary member, wherein a moving path comprising an annular space is formed between the first member and the first member. A balance correction device comprising a second member to be moved and a balance body accommodated in the moving path so as to be movable at least in the circumferential direction, wherein the balance member is swingable in the radial direction with respect to the rotating member, and the rotating member is A rotating device having an elastic body for supporting the first and second members so as to rotate in conjunction with the rotating member. 6. The rotating device according to claim 5, wherein the plurality of elastic bodies support the first and second members at a plurality of positions in a rotation axis direction of the rotating member. 7. The elastic member is interposed between an outer peripheral surface or an inner peripheral surface of the rotating member and at least one of an inner peripheral surface or an outer peripheral surface of the first or second member. A rotating device according to claim 5, characterized in that: 8. The rotating device according to claim 5, wherein the elastic body has a ring shape.