JP2000235758A - Clamping device of rotary body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the sure and stable clamping of a rotary body such as a disk rotating at high speed by the simple and inexpensive constitution. SOLUTION: In this clamping device of the rotary body, the clamping member 21 is constituted of a tray type abutting body 22 consisting of a hard plastic such as PET, on the lower surface of which the disk D is abutted, a yoke plate 23 with a circuit by planar viewing consisting of a magnetic material such as an iron disposed inside the abutting body 22, and a rubber member 24 as a connecting body for connectedly supporting the yoke body 23 with respect to the abutting body 22 in the vertical direction with elasticity. The disk D is held between such clamping member 21 and a turntable 8 as the rotating member fixed to a shaft of a motor 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating body clamping device for holding a rotating body such as a disc such as a CD, CD-ROM, DVD or the like between a holding member and a rotating member.

[0002]

2. Description of the Related Art Rotating bodies such as CDs, CD-ROMs and DVs
A conventional clamping device for holding a removable disk such as D is configured as shown in FIGS. 8 and 9, for example.

[0003] That is, as shown in FIGS. 8 and 9, a rotating body CD is provided inside a fixing member such as a frame or a chassis.
A disk D such as a ROM is removably mounted, and a holding member 1 is disposed above the disk D in the mounted state. The holding member 1 is made of a hard plastic such as PET and has a dish-shaped base 1b having an opening 1a formed in the center of the lower surface, and a diameter larger than the opening of the base 1b fixedly arranged inside the base 1b. And a circular iron plate 1c. The holding member 1 is supported by the fixed member when stationary, and is disposed on the fixed member so as to be vertically movable within a predetermined range so as to be separable from the fixed member when rotating.

A mechanical chassis 2 is vertically movable below the holding member 1 inside the fixed member, and the mechanical chassis 2 is moved vertically by a drive mechanism (not shown). At this time, the amount of movement of the mechanical chassis 2 is set to be larger than the amount of movement of the holding member 1 up and down. Further, a through hole 4 is provided in the mechanical chassis 2, and a motor substrate 6 on which a disk drive motor 5 is mounted so as to close the through hole 4 is attached to the mechanical chassis 2.
Is fixed to the upper surface side of the device by bolts and nuts.

The disk drive motor 5 has a turntable 8 as a rotating member. The turntable 8 includes a boss 8a whose upper end is inserted into the opening 1a of the base 1b of the holding member 1, and a disk mounting portion 8b formed integrally with the outer periphery of the boss 8a.
The disk D is mounted on the disk mounting portion 8b via a buffer such as rubber or sponge. Further, the boss 8a
A ring-shaped back yoke 10 and a magnet 11 for clamping are embedded in the upper surface of the
Is exposed.

Then, when the mechanical chassis 2 moves upward by the above-described driving mechanism and the motor 5 moves upward,
The upper portion of the turntable 8 enters into the opening 1a of the holding member 1, and the iron plate 1c is magnetically attracted to the clamping magnet 11. Thus, the disc D is clamped between the disc mounting portion 8b of the turntable 8 and the lower surface of the base 1b of the holding member 1, and the disc D is clamped. At this time, the holding member 1 is separated from the fixed member and becomes rotatable integrally with the turntable 8, and in this state, the motor 5 rotates and the disk D rotates.

On the other hand, the rotation of the motor 5 is stopped, and the mechanical
Is moved down, the holding member 1 and the turntable 8 are both moved down, and only the turntable 8 is moved down from the middle, so that the magnetic attraction state of the iron plate 1c by the clamp magnet 11 is released, and the disk D is unlocked. Clamping (release of the clamped state) is performed, the holding member 1 is separated from the disk D, and is held by the fixed member, and the disk D mounted on the disk mounting portion 8b of the turntable 8 is moved together with the motor 5. Move down.

[0008]

By the way, recent CDs
-The speed of the ROM drive motor is steadily increasing, and the centrifugal force applied to the disk D is increasing.
For example, when the the disc D rotating at angular velocity w is unbalanced U, centrifugal force F applied to the disk D is expressed by F = U · w ^2, an angular velocity twice, 3
If it is doubled, the centrifugal force of 4 times or 9 times that is the square will be applied to the disk D.

At this time, the force applied to the pressing member 1 from the rotating disk D increases with the increase in the centrifugal force F, whereas the force of the pressing member 1 pressing the disk D does not change. Therefore, in order to reliably press the disc D against the increasing centrifugal force on the disc D, it is necessary to press the disc D with a force exceeding the supposed centrifugal force.

On the other hand, most of the ordinary disk D is a so-called removable type (detachable type), and in order to attach or detach the disk D, the pressing force of the pressing member 1 cannot be increased so much. That is, if the pressing force of the pressing member 1 is excessively large, the disk D is greatly deformed and the reading performance is hindered, and at the time of detachment, the suction state of the iron plate 1c by the clamping magnet 11 is released as described above. In doing so, a problem arises in that a very large force is required to move the mechanical chassis 2 downward by the drive mechanism.

However, in order to release the attracted state of the iron plate 1c by the clamp magnet 11 without increasing the force required for moving the mechanical chassis 2 by the drive mechanism, a very complicated mechanism must be separately introduced. Without
There is a possibility that the cost will increase and the entire device will be enlarged.
Further, if the mechanical chassis 2 is moved by the conventional driving mechanism without introducing such a mechanism, the pressing of the disk D becomes ineffective during rotation and the disk D scatters, and the peripheral devices are damaged. Is also conceivable.

Also, as described above, the base 1 of the holding member 1
Since b is made of hard plastic, when vibration or sudden external force of the disk D or the motor 5 is applied, the force is immediately transmitted to the iron plate 1c, and the force is transmitted between the iron plate 1c and the clamping magnet 11. The distance changes. If this distance is large, the magnetic attraction force becomes weak.
Is easily disengaged and the disk D is scattered.
On the other hand, if the distance between the iron plate 1c and the magnet 11 for clamping is small, the magnetic attraction force becomes strong. Therefore, when the disk D starts to tilt and the iron plate 1c starts to tilt, the entire holding member 1 is tilted. There is also an inconvenience such that the moment in the direction in which the inclination becomes worse acts and the inclination increases.

A problem to be solved by the present invention is to enable a rotating body rotating at a high speed to be reliably and stably pressed with a simple and inexpensive structure.

[0014]

In order to solve the above-mentioned problems, the present invention is directed to a pressing member, wherein the pressing member has a lower surface in contact with the rotating body and a concave portion in the center of the lower surface; A yoke plate made of a magnetic material disposed in the recess,
A connecting member for connecting and supporting the yoke plate with elasticity in the vertical direction with respect to the contacting member. The connecting member is supported by a fixed member when stationary, detaches from the fixed member when rotating, and is integrated with the rotating member. And the rotating member is provided with a clamping magnet for attracting the yoke plate to clamp the rotating body between the lower surface of the contact body and the rotating member. Features.

According to this structure, the yoke plate on the holding member is magnetically attracted by the magnet for clamping on the rotating member, and the rotating body is sandwiched between the lower surface of the contact member and the rotating member. The rotating body rotates in conjunction with the rotation of.

At this time, since the yoke plate is connected to and supported by the connecting member with elasticity in the vertical direction with respect to the abutting member, even if a vibration or sudden external force is applied, the force is transmitted to the yoke plate. Without this, the change in the distance between the clamp magnet and the yoke plate is also suppressed, and the magnetic attraction state of the yoke plate by the clamp magnet is maintained. Further, even if the rotating body is tilted due to vibration or sudden external force, the holding member is prevented from tilting.

Therefore, with a simple and inexpensive configuration, even when the rotating body rotates at high speed, the rotating body can be stably pressed. Here, the rotating member is, for example, a member fixed to a shaft of a motor and rotates together, and more specifically, a turntable on which a disk serving as a rotating body is mounted is desirable. Further, the concave portion of the contact body on which the yoke plate is to be disposed is preferably, for example, an opening or a concave hole formed at the center of the lower surface of the contact body.

Further, the present invention is characterized in that the connecting member is made of rubber. In this case, the connecting body can be easily formed by molding, and the elastic support of the yoke plate can be easily realized.

Further, the present invention is characterized in that the connecting member is formed of a spring, and both ends thereof are fixed to the contact member and the yoke plate, respectively. Even in this case, the elastic support of the yoke plate can be easily realized.

Further, the present invention is characterized in that a buffer member is provided on the lower surface of the contact body. In this case, when the rotating body is sandwiched between the contact body and the rotating member, the vibration and the external force are effectively absorbed by the buffer member, so that the transmission of the vibration of the rotating body and the rotating member to the pressing member can be suppressed. At this time, the cushioning member is desirably rubber, sponge, or the like.

Further, the present invention is characterized in that the contact body and the connecting body are integrally formed of an elastic material. In this case, the number of parts of the pressing member can be reduced by integrally forming the contact body and the connecting body with an elastic material. Further, when the contact body is in contact with the rotating body, a pressure difference is generated inside and outside the space formed by the rotating body, the contact body, the connecting body, and the yoke plate, and the contact body rotates due to the pressure difference. Since it is in close contact with the body, it is possible to more firmly hold the rotating body.

Further, according to the present invention, the pressing member has a ring-shaped abutting member with which the rotating body abuts on a lower surface, and a connecting member integrally formed inside the abutting member and having elasticity in a vertical direction. A body, an attachment body integrally formed inside the connecting body, and a yoke plate made of a magnetic material attached to the attachment body, supported by a fixed member at rest,
At the time of rotation, the yoke is detached from the fixed member and becomes rotatable integrally with the rotating member, and the yoke is provided on the rotating member so as to clamp the rotating body between the lower surface of the abutting body and the rotating member. It is characterized in that a clamp magnet for sucking the plate is provided.

By doing so, the elasticity of the connecting body
Vibration and external force to the rotating body and rotating member can be effectively absorbed to suppress transmission of vibration and the like to the holding member, and furthermore, inclination of the holding member due to inclination of the rotating body caused by vibration of the rotating body and rotating member. Can be suppressed. Further, the pressing member can be easily formed, and the elastic support of the yoke plate can be easily realized. Here, the elasticity of the connector can be realized by, for example, forming the connector in a spiral or radial shape.

Further, the present invention is characterized in that the mounting body and the yoke plate are integrally formed of a magnetic material. In this case, the pressing member can be formed more easily.

Further, according to the present invention, preferably, the pressing member has an abutting member having the lower surface in contact with the rotating body and a concave portion in the center of the lower surface;
A yoke plate made of a magnetic material disposed in the recess of the contact body, and a buffer provided on the lower surface of the contact body, are supported by a fixed member when stationary, and fixed when rotated. The rotating member is separated from the member and becomes rotatable integrally with the rotating member, and the rotating member sucks the yoke plate so as to sandwich the rotating body between the lower surface of the contact body and the rotating member. It is characterized in that a clamping magnet is provided.

With this configuration, when the rotating body is sandwiched between the contact body and the rotating member, the vibration and external force are effectively absorbed by the elasticity of the buffer, and the vibration of the rotating body and the rotating member is applied to the pressing member. Transmission can be suppressed, and even if the rotating body is tilted due to vibration or sudden external force of the rotating body or the rotating member, the tilting of the holding member can be suppressed by the elastic force of the cushioning body. The rotating body can be stably pressed. It is preferable that the buffer has a desired elasticity, such as rubber or sponge.

Further, the present invention is characterized in that the rotating body is a disk. In this case, CD, CD-
A disk such as a ROM or a DVD can be stably rotated at a high speed.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment)
A first embodiment when applied to a D-ROM playback device will be described with reference to FIGS. However, FIG. 1 is a cut front view, and FIG. 2 is a partial cut front view. In this embodiment, the basic structure of the motor peripheral portion is the same as that shown in FIG.
Therefore, FIG. 8 is also referred to in the following description.

In FIG. 1 and FIG. 2, reference numeral 21 denotes a pressing member, which is a rotating member which is detachably mounted inside a fixing member (not shown) such as a frame or a chassis. In the upper position, the disk D is held by the fixed member at the time of rest, separated from the fixed member at the time of rotation, and can be integrally rotated with the disk D between the disk mounting portion 8b of the turntable 8 as a rotating member. It is arranged to be vertically movable within a predetermined range.

The pressing member 21 is made of a plate-shaped contact member 22 made of a hard plastic such as PET with which the disk D contacts the lower surface thereof, and a magnetic material such as iron disposed inside the contact member 22. The yoke plate 23 has a circular shape in a plan view, and a rubber member 24 as a connecting body that elastically connects and supports the yoke plate 23 with respect to the contact body 22 in the vertical direction. At this time, an opening 25 is formed as a recess at the center of the lower surface of the contact body 22, and the contact body 22 at the periphery of the opening 25 is slightly bent upward. It is arranged to face.

Meanwhile, a ring-shaped projection 26 is integrally formed on the inner surface of the peripheral wall of the contact body 22. Further, the rubber member 24 has a funnel shape that is divergent, and fitting portions 27a and 27b each having a U-shaped cross section are formed at both ends thereof. Then, the protrusion 26 of the contact body 22 is
And the yoke plate 23 is inserted into one of the fitting portions 27a.
Is inserted into the other fitting portion 27b of the rubber member 24,
The yoke plate 23 is urged upward by the rubber member 24 and is connected and supported by the contact body 22.

When the mechanical chassis 2 is moved upward by the driving mechanism and the turntable 8 is moved upward, the disk mount portion 8b is mounted on the disk mount portion 8b of the turntable 8 via a buffer rubber 29 provided on the disk mount portion 8b. Is moved upward, the clamp magnet 11 approaches the pressing member 21, the yoke plate 21 is magnetically attracted by the clamping magnet 11, and the pressing member 21 is separated from the fixed member, and the contact member The disk D is held between the lower surface of the turntable 22 and the turntable 8, and the disk D rotates in conjunction with the rotation of the turntable 8.

At this time, the contact member 2 is formed by the rubber member 24.
Since the yoke plate 23 is connected and supported with elasticity in the vertical direction with respect to 2, even if a vibration or a sudden external force is applied to the disk D or the motor 5, the force is not transmitted to the yoke plate 23, Variations in the distance between the clamp magnet 11 and the yoke plate 23 are suppressed, and the magnetic attraction of the yoke plate 23 by the clamp magnet 11 is maintained. Further, even if the disk D is tilted due to vibrations to the disk D or the motor 5 or a sudden external force, the entire holding member 21 does not tilt as in the related art, and the disk D can be stably pressed.

Therefore, according to the first embodiment, even if a vibration or sudden external force is applied to the disk D or the motor 5, the elastic member of the connecting member 24 prevents the force from being transmitted to the yoke plate 23. Because it can be, magnet 1 for clamping
1 and the yoke plate 23 can be suppressed from varying, and the magnetic attraction state of the yoke plate 23 by the clamp magnet 11 can be maintained.
Can be prevented, and the disk D rotating at a high speed can be reliably and stably pressed with a simple and inexpensive configuration.

Further, since the rubber member 24 is used as the connecting body, the rubber member 24 can be easily formed.
The elastic support of the yoke plate 23 can be easily realized. Note that the connecting body is not limited to the rubber member 24 as described above, and may be formed of another elastic material.

(Second Embodiment) A second embodiment of the present invention will be described with reference to FIG. However, FIG. 3 is a partially cut front view. Note that the basic configuration of this embodiment is almost the same as that of the above-described first embodiment, and therefore, the differences from FIG. 1 will be mainly described below with reference to FIG.

In this embodiment, as shown in FIG. 3, a coil spring 31 is provided as a connecting body instead of the rubber member 24,
The fact that the yoke plate 23 is connected and supported by the contact body 22 by the coil spring 31 is significantly different from the first embodiment described above. In addition, in FIG.
2 is a lid that closes an upper surface opening, and is provided to determine the highest position of the yoke plate 23.

At this time, a step is formed at the periphery of the lower surface of the yoke plate 23, and both ends of the coil spring 31 are
Is fixed to the step portion and the inner lower portion of the contact body 22,
The yoke plate 23 is connected to and supported by the contact body 22 by a coil spring 31 as a connecting body.

Therefore, according to the second embodiment, it is possible to obtain the same effects as those of the first embodiment described above, and it is also possible to obtain a special shape such as the rubber member 24 in the first embodiment. By using a general coil spring 31 instead of the above member, mass production can be performed at lower cost than in the first embodiment.

In the above-described second embodiment, another spring such as a leaf spring may be used as a connecting member instead of the coil spring 31.

(Third Embodiment) A third embodiment of the present invention will be described with reference to FIG. In the present embodiment, as shown in FIG. 4, the pressing member 35 is formed by integrally forming the contact body and the connecting body in the above-described first and second embodiments with rubber that is an elastic material. This point is significantly different from the above-described first and second embodiments.

More specifically, a ring-shaped main body 36 having a semicircular cross section made of rubber that functions as an abutting body and a connecting body.
And a fitting portion 37 having a U-shaped cross section integrally formed at the inner peripheral center portion of the main body portion 36 and functioning as a connecting body;
A yoke plate 38 made of a magnetic material such as iron and having a circular shape in a plan view, which is disposed inside the inner surface 6 and whose peripheral edge is fitted into the fitting portion 37 and connected to and supported by the main body portion 36, constitutes a pressing member 35. I have.

At this time, as described in the description of the first embodiment and the like, since the main body 36 is formed of an elastic material, it is possible to prevent sudden external force from acting on the yoke plate 38. In addition, since the lower portion of the main body 36 contacts the disc D as a contact body, a pressure difference is generated between the inside and the outside of the space formed by the disc D, the main body 36, the fitting portion 37, and the yoke plate 38. Since the lower portion of the main body 36 is in close contact with the disk D due to the pressure difference, the disk D is more firmly held.

Therefore, according to the third embodiment, the same effect as that of the first embodiment can be obtained, and the rubber main body functioning as the contact body and the connecting body can be obtained. By forming 36, the number of parts of the holding member can be reduced, and the disk D can be more firmly held.

The main body 36 does not necessarily have to have a semicircular cross section as described above.
The abutment surface may have a curved surface such as an arc-shaped cross section. Further, the upper portion of the main body 36 does not necessarily need to extend above the yoke plate 38 as shown in FIG.

(Fourth Embodiment) A fourth embodiment of the present invention will be described with reference to FIG. In the present embodiment, as shown in FIG. 5, the pressing member 41 is made of an abutting body 42 made of a hard plastic or the like having a substantially concave shape in the opposite direction.
And a disk-shaped yoke plate 43 made of a magnetic material such as iron in a central concave portion of the contact body 42, and a ring-shaped buffer 44 provided on the lower surface of the contact body 42. However, this is greatly different from the first to third embodiments.

Here, it is preferable that the buffer 44 has a certain elasticity, such as rubber or sponge. The material of the contact body 42 is not limited to the above-mentioned hard plastic, but may be other resin or metal.

Therefore, according to the fourth embodiment, the vibration and the external force can be effectively absorbed by the elasticity of the buffer body 44 in a state where the disk D is sandwiched, so that the first and second embodiments described above. The same effect as described above can be obtained, and in addition, the pressing member 41 can be easily formed by bonding the yoke plate 43 and the buffer body 44 to the contact body 42 with an adhesive or the like.

(Fifth Embodiment) A fifth embodiment of the present invention will be described with reference to FIGS. In the present embodiment, as shown in FIG. 6 and FIG.
A ring-shaped contact member 52 made of a magnetic material such as iron; and a spirally-connected member 5 integrally formed inside the contact member 52.
3 and a disk-shaped yoke plate 54 integrally formed inside the connecting body 53, which is significantly different from the above-described first to fourth embodiments. Here, even if instead of the above-mentioned spiral connection body 53, a connection body is formed radially, it is possible to give the connection body elasticity in the vertical direction.

Therefore, according to the fifth embodiment, when the disk D is sandwiched, the elasticity of the connecting member 53 can effectively absorb vibration and external force. Therefore, the first and second embodiments described above. It is possible to obtain the same effect as
Moreover, the pressing member 51 can be formed very easily by integrally forming the contact member 52, the connecting member 53, and the yoke plate 54.

By the way, the portion corresponding to the above-mentioned yoke plate 54 may be used as a mounting body, and the yoke plate may be fixed to the lower surface of the mounting body with an adhesive or the like.
The connecting body 53 and the mounting body do not necessarily need to be integrally formed of a magnetic material. If the connecting body 53 has a desired elastic force, it can be integrally formed of a material that is even cheaper than a magnetic material. .

In the first, second and fifth embodiments described above, the abutting member 2 constituting the holding members 21 and 51
Needless to say, a cushioning member made of rubber, sponge, or the like may be provided on the lower surfaces of 2, 52.

In each of the above embodiments, the CD-R
The case where the present invention is applied to a CD-ROM reproducing apparatus for driving a disk D composed of an OM has been described.
The present invention can be similarly applied to other removable disks such as CDs, DVDs, DVD-ROMs, and MOs other than ROMs.

Further, the rotating body is the disk D as described above.
However, the present invention is not limited to a disk, but may be a reel on which a tape, a thread, or the like is wound, in addition to a disk. In each case, almost the same effects as those of the above-described embodiments can be obtained.

Further, in each of the above embodiments, the rotating member is described as the turntable 8 fixed to the shaft of the motor 5, but the rotating member is not limited to such a turntable. Not even.

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

[0057]

As described above, according to the first aspect of the present invention, it is possible to prevent the vibration and sudden external force from being transmitted to the yoke plate by the elasticity of the connecting body to the rotating body or the rotating member. In addition, it is possible to maintain the magnetic attraction state of the yoke plate by the clamp magnet by suppressing the fluctuation of the distance between the clamp magnet and the yoke plate, and to reduce the inclination of the holding member due to the inclination of the rotating body due to vibration or the like. With a simple and inexpensive configuration, a rotating body that rotates at high speed can be stably pressed, and it is possible to provide a clamp device suitable for, for example, a disk drive device.

According to the second aspect of the present invention, since the connecting member is formed of rubber, the connecting member can be formed by simple molding, and the elastic support of the yoke plate can be easily realized. It becomes possible.

According to the third aspect of the present invention, since the connecting body is formed by a spring, the elastic support of the yoke plate can be realized easily and inexpensively.

According to the fourth aspect of the present invention, since the vibration member and the external force can be effectively absorbed by the buffer member, the transmission of the vibration of the rotating body and the rotating member to the holding member can be easily suppressed.

According to the fifth aspect of the present invention, the number of parts of the holding member can be reduced by integrally forming the contacting member and the connecting member with an elastic material. Further, when the contact body is in contact with the rotating body, a pressure difference is generated inside and outside the space formed by the rotating body, the contact body, the connecting body, and the yoke plate, and the contact body comes into close contact with the rotating body. Therefore, the rotating body can be more firmly held.

According to the sixth aspect of the present invention, since the abutment body, the connecting body and the mounting body are integrally formed, the pressing member can be easily processed and formed, and the elastic support of the yoke plate is provided. It can be easily realized.

According to the seventh aspect of the present invention, since the mounting body and the yoke plate are integrally formed of a magnetic material,
The pressing member can be more easily formed.

According to the eighth aspect of the present invention, the vibration and the external force can be effectively absorbed by the elasticity of the shock absorber, and the transmission of the vibration of the rotating body and the rotating member to the pressing member can be suppressed. Even if the rotating body is tilted due to vibration of the body or rotating member or sudden external force, the holding member can be restrained from tilting by the elastic force of the shock absorber, and the rotating body rotating at high speed can be stably pressed by a simple and inexpensive configuration. be able to.

According to the ninth aspect of the present invention, C
Disks such as D, CD-ROM, and DVD can be rotated at high speed stably.

[Brief description of the drawings]

FIG. 1 is a cutaway front view of a first embodiment of the present invention.

FIG. 2 is a partially cut front view of the first embodiment of the present invention.

FIG. 3 is a cutaway front view of a second embodiment of the present invention.

FIG. 4 is a cutaway front view of a third embodiment of the present invention.

FIG. 5 is a partially cut front view of a fourth embodiment of the present invention.

FIG. 6 is a partial plan view of a fifth embodiment of the present invention.

FIG. 7 is a partially cutaway front view of a fifth embodiment of the present invention.

FIG. 8 is a cut-away front view of a conventional example.

FIG. 9 is a partially cut front view of a conventional example.

[Explanation of symbols]

 D Disc (rotating body) 8 Turntable (rotating member) 11 Clamping magnet 21, 35, 41, 51 Holding member 22, 42, 52 Contact body 23, 38, 43, 54 Yoke plate 24 Rubber member 31 Coil spring 36 Main body (contact body, connecting body) 37 Fitting part 44 Buffer 54 Connecting body

Claims (9)

[Claims] 1. A rotating body clamping device comprising a pressing member and a rotating member for sandwiching a rotating body between the pressing member, wherein the pressing member has a lower surface in contact with the rotating body and a concave portion in the center of the lower surface. And a yoke plate made of a magnetic material disposed in the recess of the abutment, and a connection for elastically connecting and supporting the yoke plate with respect to the abutment. The stationary member is supported by a fixed member when stationary, detaches from the fixed member when rotating, and becomes rotatable integrally with the rotating member, and the rotating member includes a lower surface of the contact body and the rotating member. A rotating body clamping apparatus, further comprising a clamp magnet for attracting the yoke plate so as to clamp the rotating body between the rotating body and a member. 2. The rotating body clamping device according to claim 1, wherein the connecting body is made of rubber. 3. The rotating body clamping device according to claim 1, wherein the connecting body is formed of a spring, and both ends thereof are fixed to the contact body and the yoke plate, respectively. 4. The clamping device for a rotating body according to claim 1, wherein a buffer member is provided on a lower surface of the contact body. 5. The device according to claim 1, wherein the contact body and the connecting body are integrally formed of an elastic material.
A clamping device for a rotating body according to claim 1. 6. A rotating body clamping apparatus comprising: a holding member; and a rotating member that sandwiches a rotating body between the holding member, wherein the holding member has a ring-shaped contact with which the rotating body abuts on a lower surface. A contact body, a connecting body integrally formed inside the abutting body and having elasticity in a vertical direction, a mounting body integrally formed inside the connecting body, and mounted on the mounting body. A yoke plate made of a magnetic material. The yoke plate is supported by a fixed member when stationary, detaches from the fixed member when rotating, and can rotate integrally with the rotating member. A clamping magnet for attracting the yoke plate so as to clamp the rotating body between a lower surface of the rotating body and the rotating member. 7. The rotating body clamping device according to claim 6, wherein the attachment body and the yoke plate are integrally formed of a magnetic material. 8. A rotating body clamping apparatus comprising: a holding member; and a rotating member for holding a rotating body between the holding member, wherein the holding member has a lower surface in contact with the rotating body and a concave portion in the center of the lower surface. And a yoke plate made of a magnetic material disposed in the concave portion of the contact body, and a buffer provided on the lower surface of the contact body, and a stationary member when stationary. Carried, detached from the fixed member at the time of rotation and become rotatable integrally with the rotating member,
The rotating member is provided with a clamp magnet for attracting the yoke plate so as to clamp the rotating body between a lower surface of the contact body and the rotating member. apparatus. 9. The rotating body clamping device according to claim 1, wherein the rotating body is a disk.