JP2001319402A - Disk clamp device and motor provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk clamp device capable of easily mounting and dismounting a disk without deforming it elastically. SOLUTION: The disk clamp device is provided with a placing table body 26 for placing a disk, a rotating member 46 which is freely rotatable with respect to the body 26 and plural holding pawls 44 mounted to the member 46 in the state of being freely rockable between a holding position and a releasing position. When, the member 46 is turned in a prescribed direction, the plural pawls 44 are rocked outward in a radial direction from the releasing position and held at holding positions, thereby the disk is held between the body 26 and the pawls 44. When the member 46 is rotated in a direction opposite to the prescribed direction with respect to the table 26, the plural pawls 44 are rocked inward in the radial direction from the holding position and held at releasing positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CD-ROM,
The present invention relates to a disk clamp device for detachably holding a disk such as a VD and a motor having the disk clamp device.

[0002]

2. Description of the Related Art In recent years, as the storage capacity of a computer has increased, a disk drive apparatus for rotating a disk such as an optical disk or a CD-ROM has been required to increase the rotational speed of the disk in order to shorten the access time. Is required. In addition, portable (so-called notebook) personal computers tend to be smaller and thinner in order to further enhance portability, and accordingly, a motor and a disk for rotating and driving a disk are required. There is a demand for a smaller and thinner disk clamp device for holding the disk.

In order to satisfy such demands, for example, a disk clamp device having a ball chuck structure (see Japanese Patent Application Laid-Open No. 10-285858) has been put to practical use. In this known disk clamp device, a plurality of pressing claws are provided on a disk mounting member at intervals in a circumferential direction, and these pressing claws are movably displaced radially outward by a spring member. . These pressing claws are CD-
It acts radially outward on the upper edge of the mounting hole of a disk such as a ROM, and the pressing force of the pressing claw acts at a plurality of places, so that the disk is firmly held without coming off even if it rotates at high speed.

[0004]

However, in this known ball chuck structure, a disk is mounted (a disk is fitted on a plurality of pressing claws) or a disk is released (a plurality of pressing claws). When the disk is removed from the disk), the disk presses the pressing claw axially downward or axially upward, so that the pressing claw retreats inward in the radial direction. At this time, since the pressing force from the pressing claw on the disk is extremely large, the disk itself elastically deforms. When the elastic deformation of the disk is increased as described above, a large stress acts on the inner peripheral portion of the disk, which may cause a crack. Even if the stress is small, cracks may occur due to frequent repetition. When this crack becomes large, not only is it difficult to securely hold the disk, but also in some cases, the disk is completely damaged and cannot be used.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk clamp device capable of easily mounting and dismounting a disk without elastically deforming the disk, and a motor provided with the disk clamp device.

[0006]

According to the present invention, there is provided a disk clamping apparatus for detachably holding a disk, wherein the disk is mounted on the mounting table and the table is movable in a radial direction. And a holding claw for a disk mounted as described above, wherein the holding claw is guided on the disk, and holds the disk between the holding table and the mounting table. According to the present invention, the disk holding claw is guided on the surface of the disk and moves in the radial direction, and the disk is held between the mounting table and the holding claw. When removing the disc,
The holding claws come off the surface of the disk. Therefore, at the time of loading and unloading the disk, the load from the holding claws hardly acts on the disk, the disk is not elastically deformed, and cracking or breakage of the disk can be prevented. In addition, even a disc having a rough mounting hole due to poor quality can be clamped without any trouble.

According to the present invention, there is further provided a rotating member which is rotatable relative to the placing table body, and the holding claws are attached to the rotating member at a plurality of intervals in a circumferential direction. The plurality of holding claws are each swingable between a holding position in which a tip end side extends radially outward and a release position in which the holding claw retreats radially inward from the holding position. When the disk is mounted on the body and the rotating member is rotated in a predetermined direction with respect to the mounting table body, the plurality of holding claws swing radially outward from the release position. The disc is held at the holding position, whereby the disc is sandwiched between the placing table body and the plurality of holding claws, and the rotating member is opposite to the predetermined direction with respect to the placing table body. When turned in the direction
The plurality of holding claws are swung radially inward from the holding position and held at the release position, whereby the holding by the plurality of holding claws is released.

According to the present invention, the mounting table body and the rotating member are relatively rotatable, and a plurality of holding claws are swingable between the holding position and the release position on the rotating member. It is installed. When the rotating member is rotated in a predetermined direction, the plurality of holding claws swing radially outward with the rotation, and are held at a holding position in which the distal end side extends radially outward. The disk placed on the table is sandwiched between the table and a plurality of holding claws. Further, when the rotating member is rotated in a direction opposite to the predetermined direction in such a state of holding the disk, the plurality of holding claws are retracted radially inward from the holding position and held at the release position, As a result, the clamp by the plurality of holding claws is released, and the disk can be removed from the mounting table body. Since the plurality of holding claws are held at the holding position and the release position by rotating the rotating member in the predetermined direction and the opposite direction, a simple movement of rotating the rotating member is performed. Thus, loading and unloading of the disk can be performed.

In the present invention, the mounting table body includes a table body on which the disk is mounted, and a centering member for centering the disk on the table body. The holding claws are
In the holding position, their tip sides project radially outward from the centering member, and in the release position, their tip sides are substantially housed in the centering member.

According to the present invention, the disk placed on the table body is centered by the centering member, and the disk is held at a predetermined position on the table body.
In the holding position, the tip sides of the plurality of holding claws protrude radially outward from the centering member, so that these holding claws act on the disc on which the holding claw is mounted, and the gap between the table body and the plurality of holding claws is formed. The disc can be clamped. On the other hand, in the release position, since the distal ends of the plurality of holding claws are substantially accommodated in the centering member, these holding claws do not act on the disc on which they are mounted, and therefore, the disc is moved from the mounting table body. Can be removed.

In the present invention, the rotating member is rotatable with respect to the mounting table body between a first angular position and a second angular position over a predetermined angular range. When the moving member is located at the first angular position, the plurality of holding claws are held at the release position, and when rotating from the first angular position in the predetermined direction to the second angular position, A plurality of holding claws are held at the holding position.

According to the invention, the rotating member is rotatable between the first angular position and the second angular position, and the holding claw is held at the release position in the first angular position. In the second angular position, the holding claw is held in the holding position,
The disc can be held and released by the holding claw by rotating between the second angle position and the second angle position. In the present invention, a rotation restricting mechanism for restricting rotation of the rotation member is provided, and the rotation restriction mechanism restricts rotation of the rotation member beyond the first angular position. In addition, the rotation of the rotation member beyond the second angular position is limited.

According to the present invention, since the rotation restricting mechanism for restricting the rotation range of the rotation member is provided, the rotation of the rotation member beyond the first angular position and the second angle of rotation are performed. Rotation beyond the position is reliably restricted, thereby preventing malfunction of the disc clamp device. Further, in the present invention, the rotation restricting mechanism includes a projection provided on one of the placing table body and the rotation member, and a restriction guide recess provided on the other thereof to receive the projection. When the rotating member is at the first angular position, the protrusion is located at one end of the regulating guide concave portion, and when the rotating member is at the second angular position, the protrusion is at the second angular position. It is characterized by being located at the other end of the regulating guide recess.

According to the present invention, the rotation restricting mechanism comprises a projection and a regulating guide recess for receiving the projection, and the projection is provided on one of the mounting table and the rotating member. Is provided on the other side. In the first angular position, the projection is located at one end of the regulating guide recess, and at the second angular position, the projection is located at the other end of the regulating guide recess. Rotation of the rotation member beyond the first and second angular positions can be reliably limited.

[0015] In the present invention, the rotation restricting mechanism includes:
The above-mentioned mounting table body and a magnetized portion provided on the opposing surfaces of the rotating member opposing each other, wherein the magnetized portion has N poles and S poles alternately arranged in a circumferential direction, and the In the first and second angular positions, the placing table body and the magnetized portion of the rotating member magnetically attract each other, and between the first and second angular positions,
The above-described placement table body and the magnetized portion of the rotating member magnetically repel each other.

According to the present invention, the rotation restricting mechanism comprises a magnetized portion provided on the opposite surface of the mounting table and the rotating member, and these magnetized portions have an N pole and an S pole in the circumferential direction. Are arranged alternately. In the first angular position,
The N-pole (S-pole) of the magnetized portion of the mounting table body and the S-pole (N-pole) of the magnetized portion of the rotating member are opposed to each other, whereby these magnetized portions magnetically attract each other. On the other hand, between these angular positions, the N-pole (S-pole) of the magnetized portion of the mounting table body and the N-pole (S-pole) of the magnetized portion of the rotating member are opposed to each other. The part becomes magnetically repelled. Since these magnetized portions act in this manner, the rotating member is securely held at the first and second angular positions with respect to the mounting table body, and the first or second angular position is maintained.
Between the two angular positions.

Further, in the present invention, the placing table body and the rotating member are connected by connecting means formed of a shape memory alloy, and the connecting member has a shape stored when the temperature exceeds a predetermined temperature. Returning, the rotation member is held at the first angular position. According to the present invention, the mounting table body and the rotating member are connected by a connecting member formed of a shape memory alloy,
The connecting member is configured to return to a stored shape when the temperature exceeds a predetermined temperature, and the predetermined temperature is set to, for example, about 30 ° C. In this case, the rotating member is normally configured to be held at the second angular position by being urged by, for example, a spring member or the like. Therefore, when the operator touches the rotating member or the like, the temperature of the connecting member returns to the stored shape exceeding the predetermined temperature, and the rotating member is held at the first angular position by the change in the form at the time of the return. This allows the disk to be mounted on the mounting table.

In the present invention, when the rotating member is rotated in a predetermined direction and a direction opposite to the predetermined direction with respect to the mounting table body, the rotating member moves in a direction approaching the mounting table body and in a direction away from the mounting table body. The rotating member is further provided with a temporary mounting portion for temporarily mounting the disk, and the disk is temporarily mounted on the temporary mounting portion and pressed. Then, the rotating member moves toward the placing table body and rotates in the predetermined direction, whereby the plurality of holding claws are positioned from the release position to the holding position. I do.

According to the present invention, when the rotating member rotates in a predetermined direction with respect to the mounting table body and in a direction opposite thereto, the rotating member moves in a direction approaching the mounting table body and in a direction away from the mounting table body. It is configured. The rotating member is provided with a temporary mounting portion, and when the disk is mounted on the temporary mounting portion and pressed, the temporary mounting portion moves toward the mounting table body and rotates in a predetermined direction, As a result, the plurality of holding claws are held at the holding positions. Therefore, the disk can be removably mounted on the mounting table by a simple operation of pressing the disk mounted on the temporary mounting portion.

Further, in the present invention, the placement table body is provided with a magnetized portion, and the rotating member is formed of a magnetic material. A biasing member for biasing the rotating member in a direction away from the mounting table body is disposed between the rotating member and the rotating member, and the disk is temporarily mounted on the temporary mounting portion. When pressed, the rotating member moves toward the placing table body and rotates in the predetermined direction, and the magnetized portion of the placing table body magnetically attracts the rotating member. The rotation member is held at the second angular position.

According to the present invention, the mounting table is provided with a magnetized portion, and a biasing member is interposed between the mounting table and the rotating member. Therefore, the rotating member is normally biased away from the mounting table by the action of the biasing member, and the rotating member is held at the first angular position. When the disk is temporarily mounted on the temporary mounting portion and pressed in such a state, the rotating member moves toward the mounting table and rotates in a predetermined direction, and the magnetized portion of the mounting table rotates. By magnetically attracting the moving member, the rotating member is held at the second angular position, and thus the plurality of holding claws are moved to the holding position by utilizing the magnetic action of the magnetized portion of the mounting table. Can be held.

Further, in the present invention, the plurality of holding claws are attached to the rotating member so as to be inclined in a radially outward direction with respect to a center axis of the swing, and the plurality of holding claws are provided at the holding position. The distal end side of each of the holding claws extends radially outward in a direction inclined toward the placement table body. According to the present invention, since the tip sides of the plurality of holding claws extend in the holding position at an angle in the radially outward direction in a direction approaching the mounting table body, for example, the elasticity of the holding claws themselves is utilized. Thus, it is possible to reliably clamp discs having different thicknesses.

Further, in the present invention, the plurality of holding claws are mounted on the rotating member such that the center axis of the swing is substantially perpendicular to the surface of the disk, and the tips of the plurality of holding claws press the disk. , Which is attached to the rotating member. According to the present invention, since the tip portions of the plurality of holding claws are configured to press the disk,
Even if the thickness of the disc varies or the disc of a different thickness is mounted, the disc can be stably held without any problem.

Further, the present invention provides a motor comprising the above-mentioned disk clamp device. According to the present invention, since the above-described disk clamping device is provided, the disk can be mounted and detached with a simple operation, and a large load does not act on the disk at the time of mounting and detaching, and the disk is damaged. Also, it is possible to prevent the occurrence of cracks.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a disk clamping apparatus according to the present invention; In the following embodiments, a description will be given by applying the present invention to a disk clamp device on which a CD-ROM is mounted and a motor having the same. However, the present invention is not limited to a CD-ROM, and other similar shapes may be used. The present invention can be similarly applied to a disk, such as a DVD, which is detachably clamped.

First Embodiment First, a first embodiment of a disk clamp device (and a motor having the same) according to the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing a motor provided with the disk clamp device according to the first embodiment, FIG. 2 is an exploded perspective view showing the clamp device in FIG. 1, and FIG. It is a figure for explaining movement of a holding nail of a disk clamp device.

Referring mainly to FIG. 1, the illustrated motor includes a stationary member 2 and a rotor 4, and the rotor 4 is
The disk clamp device 6 is mounted on the rotor 4 rotatably supported on the rotor 4. In this form,
The stationary member 2 has a base member 8, which is, for example, a base plate (not shown) of the disk drive.
Attached to. A hollow cylindrical tubular support member 10 is fixed to a substantially central portion of the base member 8, a sleeve bearing 12 is mounted on an inner peripheral surface of the tubular support member 10, and a stator 14 is mounted on an outer peripheral surface thereof. ing. Stator 1
Reference numeral 4 denotes a stator core 16 attached to the cylindrical support member 10 and a coil 18 wound around the stator 16 as required.

The illustrated rotor 4 has a rotor body 20 formed by pressing an iron plate into a cup shape. The rotor body 20 has a circular end wall portion 22 and a peripheral side wall portion 24 extending from the outer peripheral end of the end wall portion 22 toward the base member 8.
In this embodiment, the end wall portion 22 of the rotor body 20 functions as a part of a mounting table 26 of the disk clamp device 6 described later. A rotating shaft 28 is fixed to the center of the end wall 22 of the rotor body 20, and the rotating shaft 28 is rotatably supported by the sleeve bearing 12. One end of the rotating shaft 28 extends upward in FIG. 1 from the end wall portion 22 of the rotor main body 20, and the disk clamp device 6 is disposed at this one end. The other end of the rotating shaft 28 extends downward in FIG. 1 toward the base member 8, and the other end is rotatably supported by the sleeve bearing 12. In this embodiment, the closing member 30 is fixed to the end of the cylindrical support member 10, and the thrust plate 32 is mounted inside the closing member 30,
The end surface of the rotating shaft 28 is supported by the thrust plate 32. Since the rotating shaft 28 of the rotor 4 is thus supported, the sleeve bearing 12 supports the radial load acting on the rotating shaft 28, and the thrust plate 32 supports the thrust load acting on the rotor 4.

An annular rotor magnet 34 is mounted on the inner peripheral surface of the peripheral side wall portion 24 of the rotor body 20, and the rotor magnet 34 is disposed radially outward facing the stator 14. Stator 14 and rotor magnet 3
Reference numeral 4 denotes a magnetic circuit for driving the motor to rotate, and a driving current is supplied to the coil 18 of the stator 14 so that the stator core 16 is magnetized and the rotor magnet 3 is rotated.
The rotor 4 (and the disk clamp device 6 attached thereto) is rotationally driven in a predetermined direction by the mutual magnetic action of the stator 4 and the magnetized stator 14.

Next, the disk clamp device 6 and its related structure will be described with reference to FIGS. 2 and 3 together with FIG. 1. The mounting table 26 of the disk clamp device 6 shown in FIG. A centering member 36 that rotates integrally with the table body 27 is provided. In this embodiment, the table main body 27 is constituted by the end wall portion 22 of the rotor main body 20 and the centering member 3
6 is fixed to the other end of the rotating shaft 28 so as to contact the outer surface of the other end 22 of the rotor body 20. The outer diameter of the centering member 36 is substantially equal to the inner diameter of a disk 38 (e.g., a CD-ROM) mounted on the mounting table body 26. At a predetermined position. The mounting table 26 may be formed separately from the rotor body 20.

In this embodiment, the centering member 36
Has three notches 40 at substantially equal intervals in the circumferential direction.
Are provided, and three notches 40 form three arc-shaped centering portions 42. A holding claw 44 is provided corresponding to each notch 40. Each holding claw 44 has substantially the same configuration,
A tapered surface (a tapered shape extending toward the tip and away from the disk 38) is formed so as to move as required on the upper surface side of the disk 38. Each holding claw 44 is a holding position protruding radially outward through the notch 40 of the centering member 36, that is, a position shown in FIG. The member 36 swings between a release position where it is housed inside through the notch 40 of the member 36, that is, a position shown in FIG.

In this embodiment, a rotating member 46 is rotatably supported near one end of the rotating shaft 28, and a locking ring 48 is provided on a portion of the rotating shaft 28 outside the mounting portion of the rotating member 46.
Is locked, and by attaching the locking ring 48 in this manner, the turning member 46 is prevented from coming off from the rotating shaft 28. Mounting holes 50 are formed in the rotating member 46 at substantially equal intervals in the circumferential direction, that is, at intervals of 120 degrees. On the other hand, a projection 52 projecting upward in FIGS. 1 and 2 is integrally provided at the base of each holding claw 44, and the projection 52 is rotatably mounted in the corresponding mounting hole 50. Accordingly, each of the holding claws 44 has the above-mentioned holding position (the position shown in FIG. 3B) and the release position (FIG. 3B) centered on the projection 52 (the center axis of which forms the swing center axis).
(Position shown by (a)).

In this embodiment, as shown in FIGS. 1 and 2,
Three holding claws 44 are provided between the centering member 36 and the rotating member 46, and the rotating member 46 is rotated on the rotating shaft 2 so that the holding claws 44 contact the bottom surface of the centering member 36.
8 is attached. The rotating member 46 is provided with respect to the table body 27 and the centering member 36 as shown in FIG.
3B and a second angular position shown in FIG. 3B. When the rotating member 46 is located at the first angular position, as shown in FIG. 3A, each mounting hole 50 of the rotating member 46 is located radially inside the centering portion 42 of the centering member 36, Accordingly, each holding claw 44 is held at a release position which is stored substantially inside the outer peripheral surface of the centering member 36, and extends in a substantially tangential direction of a connection circle connecting all the mounting holes 50. When the rotating member 46 is located at the second angular position, as shown in FIG. 3B, each mounting hole 50 of the rotating member 28 is located radially inside the notch 40 of the centering member 36. Therefore, each holding claw 44 is held at a holding position protruding radially outward from the centering member 36,
It extends radially outward. In this embodiment, a mounting hole 50 is provided in the rotating member 46 and a projection 52 of each holding claw 44 is provided. On the contrary, a projection is provided in the rotating member 46 and a mounting hole is provided in each holding claw 44. May be provided.

In this embodiment, a rotation restricting mechanism for restricting the rotation of the rotation member 46 is provided. The illustrated rotation restricting mechanism includes a projection 54 and a regulating guide recess that receives the projection 54 so as to be relatively movable. The regulating guide recess is formed by an arc-shaped regulating guide slit 56.
The protrusion 54 is provided at a predetermined position on the bottom of the centering member 36, the regulation guide slit 56 is provided at a predetermined position on the rotating member 46, and the projection 54 is received by the restriction guide slit 56. The arc angle of the regulating guide slit 56 is formed substantially equal to the circumferential angle between the first angular position and the second angular position. Because it is composed in this way,
When the rotating member 46 is located at the first angular position, the projection 54 of the centering member 36 is located at one end (the upper end in FIGS. 3A and 3B) of the regulating guide slit 56, whereby The rotation of the rotation member 46 with respect to the centering member 36 in the direction indicated by the arrow 58 (see FIG. 3A) beyond the first angular position is reliably prevented. When the rotating member 46 is located at the second angular position, the projection 54 of the centering member 36 is located at the other end of the regulating guide slit 56 (the lower end in FIGS. 3A and 3B). Thus, the rotation of the rotation member 46 with respect to the centering member 36 in the direction indicated by the arrow 60 beyond the second angular position is reliably prevented. In addition, contrary to the above, a regulating guide slit is provided in the centering member 36,
A projection may be provided on the rotating member 46, and the location of the projection 54 and the regulation guide slit 56 is not limited as long as it does not interfere with each holding claw 44.

In this embodiment, the table body 2
An annular friction member 62 is attached to the outer surface of 7 (the end wall 22 of the rotor body 20) by, for example, an adhesive. The friction member 62 is formed of, for example, a rubber material,
By providing such a friction member 62, the friction member 62 is somewhat elastically deformed by the pressing force of the disk 38, thereby improving the stability of the disk 38 and suppressing the occurrence of slippage and scratches. Can be securely clamped.

Next, the operation of mounting and detaching the disk 38 will be described. When the disk 38 is mounted, the rotating member 46 is held at the first angular position, and the holding claws 44 are held.
Is held at the release position (see FIG. 3A). In this state, the disc 38 to be mounted is mounted on the friction member 62 of the table main body 27 while being fitted to the centering member 36, and then the rotating member 46 is manually moved relative to the mounting table body 26. Is turned by a predetermined angle in the direction indicated by arrow 60 (see FIG. 3B), in this embodiment, by 60 degrees. As a result, the projections 52 of the holding claws 44 move in the direction indicated by the arrow 60, so that the distal ends of the holding claws 44 pass through the notches 40, and move outward in the radial direction while pressing the upper surface of the disk 38 to hold the disc 38. Held in position.
In this holding position, as shown in FIGS. 1 and 3B, each holding claw 44 extends radially outward and
The disc 38 acting on the outer surface of the mounting table 8 is sandwiched between the table main body 27 of the mounting table body 26 and the three holding claws 44. At this time, each holding claw 44 is
8, the disc 38 is sandwiched between the holding claw 44 and the table body 27 so that the friction member 62 is somewhat compressed, so that the holding claw 44 and the disc 38 do not move at all. In such a clamped state, the rotor 4
When the disk rotates, the disk 38 also rotates integrally therewith.

In order to remove the loaded disk 38, the rotating member 46 is manually moved relative to the mounting table 26 by a predetermined angle in a direction indicated by an arrow 58 (see FIG. 3A).
In this embodiment, it is turned by 60 degrees. As a result, the projections 52 of the holding claws 44 move in the direction indicated by the arrow 58, so that the holding claws 44 are housed in the inner space of the centering portion 42 through the notches 40 while pressing the upper surface of the disk 38, so that the holding claws 44 are at the release position Will be retained. In this release position, as shown in FIG. 3 (a), each holding claw 44 is substantially housed in the centering member 36, and does not substantially act on the loaded disk 38. By lifting, it can be removed from the mounting table body 26.

As described above, the disk 38 can be mounted on the mounting table 26 by rotating the rotating member 46 in a predetermined direction, and the rotating member 46 can be moved in the direction opposite to the predetermined direction. The disc 38 can be detached from the mounting table 26 by rotating and lifting the disc 38, and the disc 38 can be mounted and detached with a simple operation.
The load hardly acts on the disk 8, and it is possible to prevent the disk 38 from being cracked or damaged at the time of mounting and dismounting. Further, in the ball chuck structure of the known disk clamp device, if there is a bad disk, the dimensions of the mounting holes may be rough and the mounting may not be performed correctly. However, in the structure of this embodiment, the accuracy of the mounting holes is substantially reduced. Since it can be attached regardless of the above, it can be clamped as required regardless of the state of the disk 38.

In such a disk clamp device 6 and a motor provided with the disk clamp device 6, the rotor 4 is configured to rotate in the direction indicated by the arrow 58. With this configuration, the holding claws 44 are rotated by the rotation of the rotor 4. There is a tendency to move toward the holding position, and the clamped state of the disk 38 can be maintained. Second Embodiment Next, a second embodiment of a disk clamp device according to the present invention and a motor having the same will be described with reference to FIGS. FIG. 4 is a sectional view showing a motor provided with the disk clamp device according to the second embodiment.
6 is a plan view showing a holding claw of the clamp device in FIG. 4 and a configuration related thereto, and FIG. 6 is a plan view showing a permanent magnet provided in the clamp device in FIG. In the following embodiments, members that are substantially the same as those in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

Referring to FIGS. 4 and 5, in the disk crank device 6A according to the second embodiment, a ring-shaped first inner surface is provided on the upper surface of the mounting table body 26A, in this embodiment, at the bottom inner surface of the centering member 36A. A permanent magnet 72 is mounted, and a second permanent magnet 74 is provided on the lower surface of the rotating member 46A.
Is installed. The first and second permanent magnets 72 and 74 form a magnetized magnetized portion, and are arranged to face each other. Referring to FIG. 6 as well, in this embodiment, as in the first embodiment, the rotating member 46A is mounted on the mounting table 26.
In this embodiment, it is rotatable over a 60-degree angle range between a first angular position and a second angular position (the angular position shown in FIG. 5) relative to A. And in connection with this, the first and second permanent magnets 72,
As shown in FIG. 6, the magnets 74 are magnetized at substantially equal intervals in the circumferential direction, and N poles and S poles are alternately arranged at an interval of substantially 20 degrees.

The first and second permanent magnets 72 and 74 are connected to the N pole (or S) of the first permanent magnet 72 when the rotating member 46A is located at the first angular position with respect to the mounting table 26A.
When the S-pole (or N-pole) of the second permanent magnet 74 is opposed to the mounting table 26A and the rotating member 46A is located at the second angular position with respect to the mounting table 26A. The second permanent magnet 74 is arranged so that the S pole (or N pole) is located opposite the N pole (or S pole) of the one permanent magnet 72. With this arrangement, the rotating member 46
When A is located at the first (or second) angular position,
A magnetic attraction acts between the first and second permanent magnets 72 and 74, whereby the rotating member 46A is magnetically held at the first (or second) angular position. On the other hand, while the rotating member 46A moves from the first (or second) angular position to the second (or first) angular position, the first and second angular positions are not changed.
A magnetic repulsive force acts between the permanent magnets 72 and 74, whereby the rotating member 46A is rotated toward the first or second angular position. Other configurations of the disk clamp device of the second embodiment and the motor having the same are substantially the same as those shown in FIG.

In the second embodiment, the disk 38
When attaching the first and second permanent magnets 72 and 74,
The rotation member 46 is magnetically held at the first angular position by the action of, and each holding claw 44 is held at the release position. In this state, the disc 38 to be mounted is mounted on the friction member 62 of the table main body 27 while being fitted to the centering member 36A, and then the rotating member 46 is manually moved.
In a predetermined direction relative to the mounting table body 26 against magnetic attraction for maintaining the first angular position.
Rotate degrees. Thus, the S pole (or N pole) of the second permanent magnet 74 attached to the rotating member 46A faces the N pole (or S pole) of the first permanent magnet 72, and the rotating member 46A As shown in FIG. 5, the distal end side of each holding claw 4 passes through the notch 40 and moves radially outward while pressing against the upper surface of the disk 38 to be held at the holding position, as shown in FIG. Thus, the disk 38 is clamped between the table main body 27 of the mounting table body 26A and the three holding claws 44.

In order to remove the loaded disk 38, the rotating member 46A is manually held in the second angular position. It may be rotated 60 degrees in the opposite direction. Thus, the N pole (or S pole) of the first permanent magnet 72
To the S pole (or N) of the second permanent magnet 74 of the rotating member 46A.
The poles oppose each other, and the rotating member 46A is magnetically held again at the first angular position. When held at the first angular position, as in the first embodiment, each holding claw 44 is housed in the centering member 36 through the corresponding notch 40 while pressing the upper surface of the disk 38, and is released from the release position. Thus, the disk 38 can be removed from the mounting table body 26A by lifting the disk 38.

In such a disk clamp device 6A and a motor having the same, the first and second permanent magnets 72,
A magnetic attraction force acts on the rotating member 46A at a predetermined position (first and second angular positions) by 74, and constitutes a rotation limiting mechanism different from the rotation limiting mechanism as in the first embodiment. However, as described above, the rotating member 46A can be reliably held at the predetermined position. Further, when the rotating member 46A is rotated, a magnetic repulsive force acts between the first and second permanent magnets 72 and 74, so that the rotating operation can be performed smoothly. In the present embodiment, in order to more reliably prevent the malfunction of the rotating member 46A, the first
It may be used together with the rotation restricting mechanism in the embodiment.

Third Embodiment Next, a third embodiment of the disc clamping device according to the present invention and a motor having the same will be described with reference to FIG. FIG. 7 is a view for explaining the movement of the holding claws of the disc clamp device according to the third embodiment. It should be noted that the third embodiment is characterized in that the rotating member is automatically rotated to the first angular position when a disc is mounted, unlike the above-described embodiment.

Referring to FIG. 7, in the disc clamping device according to the third embodiment, a connecting member 82 and a biasing member 84 are interposed between a centering member 36B and a rotating member 46B of a mounting table 26B. The connecting member 82 is composed of a coil spring-like member 86 made of a shape memory alloy, one end of which is formed in a spiral shape, and the other end of which extends linearly. One end of the coil spring-shaped member 86 is fitted to the rotating shaft 28, connected to the vicinity of the center of the rotating member 46B, and the other end is the centering portion 42 of the mounting table body 26B, in this embodiment, the centering member 36B.
It is connected to the inner part. This coil spring-like member 86
The transition temperature is set to a predetermined temperature, for example, about 30 ° C., and when the temperature exceeds 30 ° C., the shape returns to the memorized shape, and the turning member 46B is moved with respect to the centering member 36B (that is, the mounting table body) with an arrow It is configured to deviate in the direction indicated by 88. The biasing member 84 is formed of a normal spring steel coil spring, and a coil spring-like member 86 is provided.
It is formed in the same shape as. One end of the biasing member 84 is fitted on the rotating shaft 28, connected near the center of the rotating member 46 </ b> B, and the other end is connected to the centering member 46.
B is connected to the inside. The biasing member 84 moves the rotating member 46B with respect to the centering member 36B by an arrow 9
It is elastically biased in the direction indicated by 0. The coil spring member 86 and the biasing member 84 do not interfere with each other.
Other configurations of the disk clamp device 6B of the third embodiment are substantially the same as those of the first embodiment, and are provided with the same rotation restricting mechanism.

In the third embodiment, normally, the biasing member 84 biases the rotating member 46B in a predetermined direction indicated by an arrow 90, and as shown in FIG.
The protrusion 54 provided on the centering member 46B is located at the other end of the regulating guide slit 56,
Each holding claw 44 is held at the second angular position, and is held at a holding position protruding radially outward from the centering member 36B. At this time, the spiral portion of the coil spring-like member 86 is extended by the biasing force of the biasing member 84. On the other hand, when the coil spring-like member 86 is slightly warmed and its temperature exceeds, for example, 30 ° C., the coil spring-like member 86
When the spring returns to the original spiral shape and returns to the shape before deformation, the coil spring-like member 86 turns the turning member 46B in the direction opposite to the predetermined direction indicated by the arrow 88 against the biasing force of the biasing member 84. Then, as shown in FIG.
The protrusion 54 provided on the centering member 46B is located at one end of the regulating guide slit 56,
The holding claws 44 are held at the first angular position, and the holding claws 44 are held at the release positions housed in the centering member 36B.

In the third embodiment, the disk 38
To mount the disk, the operator touches the rotating member 46B to warm the coil spring-like member 86, and then mounts the disk 38 to be mounted on the table main body 27. Rotating member 4
When the coil spring-like member 86 is heated by touching the coil spring-like member 86 (for example, when the temperature exceeds 30 ° C.), the coil spring-like member 86 returns to its original shape as shown in FIG. Is rotated in the direction indicated by the arrow 88, and each holding claw 44 is rotated.
Is automatically held at the release position accommodated in the centering member 36B. Then, in this state, the disk 38 to be mounted on the table main body 27 (see FIG. 1) is mounted while being fitted on the centering member 36B. Thereafter, when the temperature of the coil spring-like member 86 decreases to near room temperature (for example, drops to 30 ° C. or less), the coil spring-like member 46 is stored by the action of the biasing member 84 as shown in FIG. Deformed from the shape, the rotating member 46B rotates in the direction shown by the arrow 90, and each holding claw 44 projects from the centering member 46B and is automatically held at the holding position. Thus, the disc 38 is placed on the mounting table body 26A. It is detachably clamped between the table body 27 and the three holding claws 44.

To remove the loaded disk 38, the operator only has to touch the rotating member 46B to warm the coil spring-like member 86. As described above, the coil spring-like member 8
6 is heated, the coil spring-like member 86 returns to its original shape, and turns the turning member 46B in the direction shown by the arrow 88,
Each holding claw 44 is automatically held at the release position. In this state, the disc 38 can be removed from the mounting table 26B by lifting the disk 38.

In the disc clamping device 6B and the motor having the disc clamping device 6B, the connecting member 82 and the biasing member 84
Is provided with a simple structure, and the rotating member 46B
Can be automatically rotated, the mounting of the disc 38,
The detaching operation becomes easy. Fourth Embodiment Next, a fourth embodiment of the disk clamp device according to the present invention and a motor having the same will be described with reference to FIGS. FIG. 8 is a sectional view showing a motor provided with the disk clamp device according to the fourth embodiment.
FIG. 10 is an exploded perspective view showing the disc clamp device of FIG. 8 in an exploded manner, and FIG. 10 is a plan view for explaining the movement of the holding claws of the disc clamp device of FIG.

8 and 9, in the fourth embodiment, a helical groove 102 is provided at one end of the rotating shaft 28C.
Are formed, and a moving projection 104 is provided on the inner peripheral surface of the center hole of the rotating member 46C.
Project by approximately the same amount as the depth of the spiral groove 102, and are movably received in the spiral groove 102. The rotating member 46C is configured to be rotatable between a first angular position shown in FIG. 10A and a second angular position shown in FIG. The length is the first and second
Are set so as to correspond to the rotation range of the angular position. Therefore, the rotating member 46C is moved from the first angular position to the second angular position.
Is rotated in a predetermined direction indicated by an arrow 106 (see FIG. 10A) toward the angular position, the rotating member 46C is moved in the axial direction of the rotating shaft 28C with the rotation.
It moves in a direction approaching 6C (downward in FIG. 8).
Conversely, when the rotating member 46C rotates from the second angular position to the first angular position in a direction opposite to the predetermined direction indicated by the arrow 108 (see FIG. 10B), this rotation is performed. Accordingly, the rotating member 46C moves in a direction away from the centering member 46C in the axial direction of the rotating shaft 28C (upward in FIG. 8).

In this embodiment, the rotating member 46C is further provided with a temporary mounting portion on which the disk 38 to be mounted is temporarily mounted, and the temporary mounting portions are arranged at equal intervals in the circumferential direction. It is composed of three fan-shaped provisional mounting projections 110 provided. Each temporary placement protrusion 110 is provided integrally with the rotating member 46C, and is moved together with the rotating member 46C. In connection with this, an elongated notch 112 extending in the circumferential direction is formed in the centering portion 42C of the centering member 36C, and the distal end side of each temporary placement protrusion 110 is provided with a corresponding notch 1
The disk 38 that projects radially outward from the centering member 36C through the 12 and is to be mounted on the protruding tip of the temporary mounting projection 110 is temporarily mounted.

Each notch 112 is provided in each of the temporary mounting projections 1.
Since the rotating member 10 rotates in the circumferential direction and also moves in the axial direction described later, the size is set to allow such movement. That is, the length of each notch 112 in the circumferential direction is set to the first angular position and the second angular position together with the corresponding notch 40 in order for the rotating member 46C to rotate without exceeding the predetermined range. And the height of each notch 112 is set so that the rotating member 46C can move without exceeding a predetermined range. The size is set to the sum of the thickness of the portion 110 and the movement amount. Note that the notches 40 and 112 and the temporary placement projection 110 constitute a rotation limiting mechanism.

A holding permanent magnet 114 is mounted on the upper surface of the mounting table 26C, in this case, on the bottom surface of the centering member 36C, and the holding permanent magnet 114 forms a magnetized portion. In this connection, the rotating member 46C is formed from a magnetic material such as iron. Further, between the centering member 36C and the turning member 46C, there is interposed a biasing member 116 composed of, for example, a coil spring. The biasing member 116 moves the turning member 46C upward in FIGS. It is deviated in a direction away from the mounting table body 26C. Therefore, when the upper surface of the rotating member 46 </ b> C contacts the locking ring 48,
(A) is held at the first angular position, whereby each holding claw 44 is held at the release position accommodated in the centering member 36C. Other configurations of the clamp device 6C of the fourth embodiment and a motor including the same are the same as those of the first embodiment.
This is the same as the embodiment. In the fourth embodiment, a rotation restricting mechanism as shown in FIGS. 9 and 10 is employed, but another rotation restricting mechanism described above may be provided.

In the fourth embodiment, the disk 38
10A, the rotating member 46 is held at the first angular position by the action of the biasing member 116, and each holding claw 44 is held at the release position, as shown in FIG. 10A. In this state, the rotating member 46C or the disk 38 to be mounted is mounted on the temporary mounting protrusion 110 while being fitted to the centering member 36C, and is manually pressed against the biasing force of the biasing member 116. Thus, as the rotating member 46C moves in a direction approaching the mounting table body 26C, the rotating member 46C rotates in a predetermined direction indicated by an arrow 108, and when pressed to a predetermined position, the rotation member 46C rotates. When the moving member 46C is rotated by 60 degrees from the first angle position, the moving member 46C is rotated as shown in FIG.
Move to the second angular position shown in (b). When moved, the holding permanent magnet 114 attached to the centering member 36C magnetically attracts the rotating member 46C, and the rotating member 46C is held at the second angular position. The distal end moves radially outward and the disk 3
8 is held at the holding position while pressing the upper surface thereof. In the mounted state of the disk 38, the mounting surface of the temporary mounting protrusion 110 is located closer to the rotor 4 than the mounting surface of the friction member 62 of the mounting table 26C. Is clamped between the mounting table 26C and the three holding claws 44.

In order to remove the mounted disk 38, the rotating member 46C is manually placed on the mounting table body against the magnetic attraction acting between the holding permanent magnet 114 and the rotating member 46C. What is necessary is just to rotate by 60 degrees with respect to 26C in the direction opposite to the predetermined direction. As a result, the turning member 46C moves in a direction away from the mounting table 26C with the turning of the turning member 46C, whereby the biasing force of the biasing member 116 is reduced by the magnetic attraction force of the holding permanent magnet 114. The pivoting member 46C is moved by the biasing member 116 to a position where the pivoting member 46C comes into contact with the locking ring 48, whereby the pivoting member 46C is pivoted to the first angular position. At this time, the disk 38 is lifted while being supported by the temporary mounting projection 110 by the movement of the rotating member 46C. When held at the first angular position, the holding claws 44 are housed in the centering member 36 and held at the release position, as in the first embodiment. It can be removed from the table 26A.

Although the embodiments of the disk clamp device according to the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and corrections can be made without departing from the scope of the present invention. is there. For example, although not particularly provided in the illustrated embodiment, the rotating member 46 is not provided.
In order to improve the operability of the turning operation of the (46A, 46B, 46C), the turning member 46 (46A, 46B,
46C), an operation unit such as a concave portion or a convex portion may be provided.

Further, for example, in order to enhance the clamping performance of the disk 38 by the holding claws 44, the following configuration may be adopted. That is, the lower surface of the tip of the holding claw 44 (the disk 3
8) may be provided with a tapered portion extending in the longitudinal direction (a tapered portion inclined in a direction away from the disk 38 toward the front end). In such a case, the tapered portion is formed in the mounting hole of the disk 38. The peripheral portion is reliably pressed, so that the disk 38 to be mounted can be more reliably clamped between the mounting table body 26 (26A, 26C) and the holding claw 44.

For example, in the illustrated embodiment, the holding claw 44 is swingable in the horizontal direction between the release position and the holding position about the swing center axis extending substantially in the vertical direction. The swing center axis is aligned with the mounting table body 26 (26
A, 26C), each holding claw 44 is turned to the rotating member 46 (46A, 46C) so as to move radially outward as the distance from the holding member 44 increases.
B, 46C).
In such a case, when in the holding position, each holding claw 44 has a disk 3 on which its tip end is placed radially outward.
8, the pressing force against the disk 38 on which the leading end is mounted increases, and thus the disk 38 can be formed by utilizing the elastic force of the holding claw 44 itself. 38 can be more reliably clamped. In addition, since the gap between the holding claw 44 and the mounting table 26 fluctuates depending on the swing position of the holding claw 44, the disk 38 can be reliably clamped even if the thickness of the disk 38 is slightly different. Even if the holding claw 44 is swung about a swing center axis extending substantially perpendicularly to the surface of the disc 38, for example, a predetermined pressing force on the disc 38 can be achieved by the following configuration. Can be obtained. That is, for example, a spring member is fitted on the projection 52 of the holding claw 44, and an elastic force is applied between the holding claw 44 and the rotating member 46. It may be made to act in a special way.

For example, when the rotation limiting mechanism shown in FIG. 1 is employed, the rotation member is configured as shown in FIG. 11 to lock and hold the rotation member at the first and second angular positions. Is also good. That is, the locking recesses 122 and 124 are formed at both ends of the regulating guide slit 56D provided on the rotating member 46D, and the projection 54D provided on the centering member 36D is elastically deformable and slightly outward in the radial direction. You may make it comprise so that it may be deviated. With this configuration, when the rotating member 46D is at the first angular position, the projection 54D is located in the locking recess 122 on one end side of the regulating guide slit 56D, whereby the rotating member 46D is moved to the first position. The lock is releasably locked at the angular position (the holding claw 44 is held at the release position), and the rotating member 46D
Is in the second angular position, as shown in FIG. 11, the projection 54D is located in the locking concave portion 124 on the other end side of the regulating guide slit 56D, whereby the rotating member 46D is moved to the second angular position. (The holding claw 44 is held at the holding position).

For example, in the above-described embodiment, the movement of the holding claw 44 is restricted by the side end of the centering portion 42 provided on the centering member 36 (36A, 36B, 36C), and the release position and the holding position are controlled. However, instead of such a configuration, for example, a configuration as shown in FIG. 12 may be employed. 12, in this modification, an elongated substantially triangular regulating recess 132 is provided on the mounting surface of the holding claw 44 of the rotating member 46E, and this regulating recess 132 is located on one side of the holding claw 44, that is, an arrow 134 (FIG. 1
2 (b)) has a relatively short first restricting portion 136 on the upstream side when viewed in the predetermined direction indicated by arrow 134, and has a relatively long second restricting portion 138 on the downstream side when viewed in the predetermined direction indicated by arrow 134. are doing. When the rotation member 46E is at the first angular position in the one provided with such a restriction recess 132, FIG.
As shown by, one side of the holding claw 44 abuts on the second restricting portion 138 of the restricting recess 132, whereby the holding claw 44
The distal end side is held at a holding position protruding radially outward from the centering member 36E. When the rotating member 46E is at the second angular position, the other side of the holding claw 44 abuts on the first regulating portion 136 of the regulating recess 132, as shown in FIG. Reference numeral 44 is held at the release position where it is stored in the centering member 36E.
Therefore, even with this configuration, the same operation and effect as described above can be achieved.

Further, for example, in the above-described embodiment, the projection 52 is provided at the base of the holding claw 44, and the projection 52 is swingably mounted in the mounting hole 50 of the rotating member 46 (46A to 46E). However, instead of such a configuration, for example, the following configuration may be adopted. That is, a substantially elongated triangular mounting notch (for example, FIG.
Corresponding to the shape of the regulating recess 132), an attachment portion is provided at the bottom of the notch, and the base of the holding claw is swingably attached to the attachment portion via a pin, Each of the holding claws may be accommodated in the corresponding notch. With this configuration, the thickness in the axial direction can be reduced in relation to the rotating member. Even in this case, the same effect as described above is achieved.

[0063]

According to the disk clamping device of the first aspect of the present invention, the holding claw is guided on the surface of the disk and moves in the radial direction, so that the disk is placed between the mounting table and the holding claw. Be pinched. When the disc is removed, the holding claws separate from the surface of the disc. Therefore, at the time of loading and unloading the disk, the load from the holding claws hardly acts on the disk, the disk is not substantially elastically deformed, and cracking and breakage of the disk can be prevented.
In addition, even if the disk has poor dimensional accuracy of the mounting hole of the disk due to poor quality, the disk can be clamped and held without any problem.

According to the disk clamping device of the second aspect of the present invention, the plurality of holding claws are turned to the holding position by turning the turning member in the predetermined direction, and in the direction opposite to the predetermined position. By doing so, the plurality of holding claws can be held at the release position, and the loading and unloading of the disk can be performed by a simple movement of the rotation of the rotating member. According to the disk clamping device of the third aspect of the present invention, the tip ends of the plurality of holding claws project radially outward from the centering member in the holding position, and are substantially housed in the centering member in the release position. So
The disk can be mounted and detached without applying a large load.

According to the disk clamping device of the fourth aspect of the present invention, the disk is held by the holding claw by rotating the rotating member between the first angular position and the second angular position. Can be canceled. According to the disk clamp device of the fifth aspect of the present invention, since the rotation restricting mechanism for restricting the rotation range of the rotation member is provided, the rotation of the rotation member exceeds the first angular position. The rotation and the rotation beyond the second angular position can be reliably limited.

According to the disk clamping device of the sixth aspect of the present invention, since the rotation restricting mechanism is constituted by a combination of the projection and the regulating guide concave portion, the rotation member has a relatively simple structure. Can be reliably restricted from exceeding the first and second angular positions.

According to the disk clamping apparatus of the present invention, the magnetized portion provided on the surface of the mounting table body and the opposing surface of the rotating member is set at the first angular position. Different poles of the magnetized portion of the body and the magnetized portion of the rotating member oppose each other and are magnetically attracted, but between these angular positions, both magnetized portions act so as to magnetically repel each other. And the rotating member with respect to the mounting table
Alternatively, it can be magnetically held at the second angular position, and the rotation of the rotation member can be performed smoothly. Further, according to the disk clamp device of the present invention, since the mounting table and the rotating member are connected by the connecting member formed of the shape memory alloy, the operator touches the rotating member. Then, the connecting member returns to the original shape stored by the connecting member, and the rotating member is held at the first angular position, whereby the mounting of the disk on the mounting table is permitted.

According to the disk clamping apparatus of the ninth aspect of the present invention, when the disk is mounted on the temporary mounting portion and pressed, the mounting table moves toward the mounting table and moves in a predetermined direction. And the plurality of holding claws are held at the holding position, so that the disc is removably mounted on the mounting table by a simple operation of pressing the disc mounted on the temporary mounting portion. be able to. Further, according to the disk clamping device of the tenth aspect of the present invention, when the disk is mounted on the temporary mounting portion and pressed, the rotating member moves toward the mounting table body and rotates in a predetermined direction. The rotating member is held at the second angular position by the magnetized portion of the mounting table body magnetically attracting the rotating member, whereby the plurality of holding claws can be held at the holding position. it can.

According to the disk clamping device of the eleventh aspect of the present invention, the disk can be reliably clamped, and the disks having different thicknesses can be surely clamped. According to the disk clamp device of the twelfth aspect of the present invention, the plurality of holding claws are mounted without any problem even if the thickness of the disk varies or a disk of a different thickness is mounted. The disc can be stably held.

Further, according to the motor of the thirteenth aspect of the present invention, when a disk such as a CD-ROM or DVD is loaded or unloaded, the load from the holding claws hardly acts on the disk, and the disk is substantially elastic. It is possible to prevent the disk from being cracked or damaged without being deformed. In addition, even if the disk has poor dimensional accuracy of the mounting hole of the disk due to poor quality, the disk can be clamped and held without any problem.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a motor provided with a first embodiment of a disc clamping device according to the present invention.

FIG. 2 is an exploded perspective view showing the clamp device in FIG. 1;

FIGS. 3A and 3B are diagrams for explaining the movement of a holding claw of the disc clamp device in FIG. 1. FIG.

FIG. 4 is a sectional view showing a motor provided with a second embodiment of the disc clamping device according to the present invention.

FIG. 5 is a plan view showing a holding claw of the clamp device in FIG. 4 and a configuration related thereto.

FIG. 6 is a plan view showing a permanent magnet provided in the clamp device of FIG. 4;

FIGS. 78a and 78b are views for explaining the movement of the holding claws in the third embodiment of the disc clamp device according to the present invention;

FIG. 8 is a sectional view showing a motor provided with a fourth embodiment of the disc clamping device according to the present invention.

FIG. 9 is an exploded perspective view showing the disk clamp device of FIG. 8 in an exploded manner.

FIGS. 10A and 10B are plan views for explaining the movement of the holding claws of the disc clamp device of FIG. 8;

FIG. 11 is a partially enlarged plan view showing a modification of the rotation restricting mechanism.

FIGS. 12A and 12B are diagrams for explaining the movement of a holding claw in a disc clamp device provided with another type of rotation restricting mechanism.

[Explanation of symbols]

Reference Signs List 2 stationary member 4 rotor 6, 6A, 6C, 6D disk clamp device 26, 26A, 26C mounting table 27 table main body 28, 28C rotating shaft 36, 36A, 36B, 36C, 36D, 36E centering member 38 disk 42, 42C , 42E Centering portion 44 Holding claw 46, 46A, 46B, 46C, 46D, 46E Rotating member 54, 54D Projection 56, 56D Regulatory guide slit 72, 74 Permanent magnet 82 Connecting member 110 Temporary placement protrusion 132 Regulatory recess

Claims (13)

[Claims] 1. A disk clamping device for detachably holding a disk, comprising: a mounting table on which the disk is mounted; and a disk holder mounted on the mounting table so as to be movable in a radial direction. And a claw, wherein the holding claw is guided on the disc, and clamps the disc with the placing table body. 2. The apparatus according to claim 2, further comprising a rotating member rotatable relative to the mounting table body, wherein a plurality of the holding claws are mounted on the rotating member at intervals in a circumferential direction. Each of the holding claws is swingable between a holding position in which the distal end side extends radially outward and a release position in which the holding claw retreats radially inward from the holding position. When the rotating member is rotated in a predetermined direction with respect to the mounting table body, the plurality of holding claws swing radially outward from the release position to the holding position. Being held, whereby the disc is sandwiched between the placing table body and the plurality of holding claws, and the rotating member is rotated with respect to the placing table body in a direction opposite to the predetermined direction. When done
2. The plurality of holding claws are swung radially inward from the holding position and held at the release position, whereby the holding by the plurality of holding claws is released. 3. Disc clamp device. 3. The mounting table body has a table main body on which a disk is mounted, and a centering member for centering the disk on the table main body. 3. A disk as claimed in claim 1 or 2, characterized in that their distal ends project radially outwardly from the centering member in a position and their distal ends are substantially accommodated in the centering member in the release position. Clamping device. 4. The rotating member is rotatable with respect to the placing table body between a first angular position and a second angular position over a predetermined angular range, and the rotating member is When the plurality of holding claws are located at the first angular position, the plurality of holding claws are held at the release position. When the plurality of holding claws are rotated from the first angular position to the second angular position in the predetermined direction, the plurality of holding claws are held. The disk clamp device according to claim 2, wherein a claw is held at the holding position. 5. A rotation restricting mechanism for restricting rotation of the rotation member, wherein the rotation restriction mechanism restricts rotation of the rotation member beyond the first angular position. 5. The disk clamp device according to claim 4, wherein rotation of said rotation member beyond said second angular position is limited. 6. The rotation restricting mechanism comprises a projection provided on one of the placing table body and the rotation member, and a regulating guide recess provided on the other of the projection table body and the projection for receiving the projection. When the rotating member is at the first angular position, the protrusion is located at one end of the restricting guide concave portion, and when the rotating member is at the second angular position, the protrusion is at the restricting position. The disk clamp device according to claim 5, wherein the disk clamp device is located at the other end of the guide recess. 7. The rotation restricting mechanism includes a magnetized portion provided on opposing surfaces of the mounting table body and the rotating member, the magnetized portion having an N pole and an S pole. The magnets are arranged alternately in the circumferential direction, and in the first and second angular positions, the mounting table body and the magnetized portion of the rotating member magnetically attract each other, and
6. The disk clamp device according to claim 5, wherein the table section and the magnetized portion of the rotating member magnetically repel between the second angular position and the second angular position. 8. The mounting table body and the rotating member are connected by a connecting means formed of a shape memory alloy, and the connecting member returns to a stored shape when the temperature exceeds a predetermined temperature. 5. The disk clamp device according to claim 4, wherein said rotating member is held at said first angular position. 9. The rotating member, when rotated in a predetermined direction and a direction opposite to the predetermined direction with respect to the mounting table, moves in a direction approaching the mounting table and a direction away from the mounting table. Mounted, the rotating member is further provided with a temporary mounting portion for temporarily mounting a disk,
When the disk is temporarily mounted on the temporary mounting portion and pressed,
The rotating member moves toward the placing table body and rotates in the predetermined direction, whereby the plurality of holding claws are positioned from the release position to the holding position. Item 6. The disk clamp device according to any one of Items 2 to 5. 10. The mounting table according to claim 1, further comprising: a magnetized portion that is magnetized, wherein the rotating member is formed of a magnetic material. A biasing member for biasing the rotating member in a direction away from the placing table body is disposed between the two, and when a disk is temporarily placed on the temporary placing portion and pressed, the disc is pressed. The rotating member moves toward the mounting table body and rotates in the predetermined direction, and the magnetized portion of the mounting table body magnetically attracts the rotating member, whereby the rotating member is moved. 10. The disc clamp device according to claim 9, wherein the disc is held at the second angular position. 11. The plurality of holding claws are tilted and attached to the rotating member such that the center axis of the swing is inclined radially outward, and in the holding position, the plurality of holding claws are provided. The disk clamp device according to any one of claims 1 to 10, wherein a front end side of the disk clamp device extends radially outward in a direction approaching the placement table body. 12. The plurality of holding claws are mounted on the rotating member such that the center axis of the swing is substantially perpendicular to the surface of the disk, and the tip of the plurality of holding claws is pressed against the disk. The disk clamp device according to claim 1, wherein the disk clamp device is attached to a member. 13. A motor comprising the disk clamp device according to claim 1. Description: