JP2002197762A - Detachable disk holding device and motor equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a holding device and a motor which can reduce manufacture cost by reducing the trouble of manufacture and suppress the transmission of vibration to a disk. SOLUTION: Individual support bases 31 for supporting the disk 22 are formed integrally with a table main body 30 to eliminate the need to fit the individual support bases 31 to the table main body 30. Further, the support bases 31 are formed not by being extended over the entire circumference, but at intervals in the circumferential direction to decrease the area of contact with the disk 22 so that the transmission of vibration from a motor 22 can be suppressed. Further, the individual support bases 31 are formed at the intervals in the circumferential direction and further through holes 43 are formed to stir air, thereby dissipating the heat generated by the motor 21. The number of support bases 31 is not limited, but three support bases are preferably formed at equal intervals so as to stably support the disk 21 and to facilitate the manufacture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus provided in a motor for driving a disk and for holding the disk in a detachable manner.

[0002] Discs include recording medium discs and other discs. The recording medium disk is, for example, a magnetic disk (MO), a mini disk (M
D), a floppy disk (FD), a compact disk read only memory (CD-ROM), a compact disk (CD), and a digital versatile disk (DVD).

[0003]

2. Description of the Related Art FIG. 16 is a cross-sectional view showing a motor 2 provided with a disk holding device 1 according to the prior art, which is an MO as a recording medium disk. The motor 2 that drives the MO disk 3 holds the disk 3 by a disk holding device (hereinafter referred to as “holding device”) 1, and rotates the holding device 1 by a motor body 4 to rotate the disk 3. ing. The holding device 1 is configured by mounting an annular support base 6 extending all around in the circumferential direction on the outer peripheral portion of the table main body 5, and holding the disk 3 inside the support base 6 with the support base 6. The disk 3 can be held in a state in which the disk 3 supports the disk 3 with magnetic attraction, and the disk 3 can be removed by lifting the disk 3 against the magnetic attraction.

[0004]

In the holding device 1 of the prior art, since the table body 5 and the support 6 are provided separately, it is necessary to attach the support 6 to the table 5. It takes time. In addition, not only the number of assembling steps is increased, but also complicated operations such as dimensions and alignment are required, and the labor of this operation is large. In addition, support table 6
Are formed by cutting, and the processing requires a great deal of labor. Since such labor is required, there is a problem that the manufacturing cost is increased.

[0005] Apart from this problem, in order to increase the recording capacity without increasing the size of the disk 3,
Improvement in recording density is desired. In order to increase the recording density, it is necessary to rotate the disk 3 with high precision. However, the motor 2 for rotating the disk 3 itself becomes an oscillation source, and the vibration is transmitted to the disk 3. There is a problem that the disk 3 vibrates. From such a background, a holding device 1 capable of suppressing transmission of vibration to the disk 3 is desired.

SUMMARY OF THE INVENTION An object of the present invention is to provide a detachable disk holding device which can reduce manufacturing labor and manufacturing cost, and suppress transmission of vibration to a disk, and a motor provided with the same. is there.

[0007]

According to the first aspect of the present invention, there is provided a disk-shaped table main body, which is formed integrally with the table main body and protrudes in the axial direction from the table main body at an interval in the circumferential direction. A detachable disk holding device including a plurality of support bases.

According to the present invention, each support for supporting the disk is formed integrally with the table body. Thus, there is no need to attach each support base to the table main body, so that the manufacturing labor can be reduced and the manufacturing cost can be reduced. Further, instead of forming a support base extending all around the circumferential direction, a plurality of support bases are formed at intervals in the circumferential direction. This makes it possible to reduce the contact area between the removable disk holding device (hereinafter simply referred to as “holding device”) and the disk. Therefore, if the holding device is provided in the motor, the contact area, which is the area for transmitting vibration from the motor to the disk, is small, so that the vibration force transmitted from the motor to the disk can be reduced. Further, since each support is formed at intervals in the circumferential direction, the surrounding air can be agitated by each support when the holding device is rotated. Thus, if the holding device is provided in the motor, a flow of air is generated, and heat generated in the motor can be released.

Here, the number of the supports is not limited, but three supports may be formed at equal intervals in order to stably support the disk and to facilitate manufacture.

According to a second aspect of the present invention, the table main body has a plurality of insertion holes, and the support stand projects substantially continuously from a portion facing the insertion hole of the table main body from a radially outer side. It is characterized by being formed in an L shape.

According to the present invention, a plurality of insertion holes are formed in the table main body, and L is connected to a desired portion of the insertion hole.
A letter-shaped support is formed. In such a configuration, the table body and the respective support bases can be formed by bending a part of the plate material, and can be easily formed. Furthermore, by making each support base L-shaped, a support surface large enough to stably support the disk can be ensured even when the plate material is formed by bending. Further, in addition to each support, air can be stirred by the portion facing each insertion hole, and each of the insertion holes can be a passage of the stirred air.
The stirring effect can be increased.

According to a third aspect of the present invention, the table main body has a plurality of insertion holes, and the support stand is connected to and protrudes from a portion facing the insertion hole of the table main body from the radially inner side. It is characterized by being formed in an L shape.

According to the present invention, a plurality of insertion holes are formed in the table body, and L is connected to a desired portion of the insertion hole.
A letter-shaped support is formed. In such a configuration, the table body and the respective support bases can be formed by bending a part of the plate material, and can be easily formed. Furthermore, by making each support base L-shaped, a support surface large enough to stably support the disk can be ensured even when the plate material is formed by bending. Further, in addition to each support, air can be stirred by the portion facing each insertion hole, and each of the insertion holes can be a passage of the stirred air.
The stirring effect can be increased.

According to a fourth aspect of the present invention, the table main body has a plurality of insertion holes, and the support stand projects continuously from a portion facing the insertion hole of the table main body from one side in the circumferential direction. It is characterized by being formed in a character shape.

According to the present invention, a plurality of insertion holes are formed in the table main body.
A letter-shaped support is formed. In such a configuration, the table body and the respective support bases can be formed by bending a part of the plate material, and can be easily formed. Furthermore, by making each support base L-shaped, a support surface large enough to stably support the disk can be ensured even when the plate material is formed by bending. Further, in addition to each support, air can be stirred by the portion facing each insertion hole, and each of the insertion holes can be a passage of the stirred air.
The stirring effect can be increased.

According to a fifth aspect of the present invention, the support base is
It is characterized in that it is formed in a bottomed cylindrical shape connected to the table body at the open end.

According to the present invention, the support base is formed in a bottomed cylindrical shape connected to the table body at the open end. Thereby, the rigidity of each support base itself is high, and the rigidity of the entire member including the table body can be increased. Therefore, the disk can be stably supported. Moreover, since the disc is supported by the bottom of each support, the contact area with the disc can be reduced and high stability can be obtained.

According to a sixth aspect of the present invention, the table body and each support are formed by press working.

According to the present invention, the table body and each support are formed by press working. This makes it possible to easily and accurately form the table body and each support base.

The present invention according to claim 7 is characterized in that the table body and each support base are molded using a mold.

According to the present invention, the table body and each support are formed using a mold. This makes it possible to easily and accurately form the table body and each support base.

The invention according to claim 8 is characterized in that it includes an aligning means for aligning the axis of the disk to be held with the axis of the table body.

According to the present invention, the axis of the disk can be held in alignment with the axis of the table body by the centering means. Accordingly, if the holding device is provided in the motor, the disk can be rotated around its axis and can be rotated stably.

The aligning means includes, for example, a cylindrical positioning portion whose outer diameter is slightly smaller than the inner diameter of the aligning hole of the disk;
A configuration having a conical or frusto-conical guide portion formed in a tapered shape in connection with this may be adopted. This configuration is simple and can be easily formed.

According to a ninth aspect of the present invention, there is provided a magnetic force generating means for generating a magnetic force for supporting and holding a disk on a support table.

According to the present invention, the disk can be held by the magnetic force of the magnetic force generating means. This simplifies the configuration for holding the rotating disk.

This magnetic force generating means may be realized using, for example, a magnet.
It is not necessary to apply a force for holding the disk by external energy, and a stable magnetic force can be generated even if the disk is used repeatedly.

According to a tenth aspect of the present invention, the magnetic force generating means includes a clamp body which is displaceable in the axial direction, and holds the disk by magnetically attracting the clamp body.

According to the present invention, the magnetic force generating means magnetically attracts the clamp member and holds the disk while holding it. Therefore, even if the disk does not have a portion made of a magnetic material, the magnetic force generating means can be used. Can hold a disc.

The first and second members may have a configuration in which, for example, at least one of them comprises a magnet.

The eleventh aspect of the present invention is characterized by including a spring force generating means for generating a spring force for supporting and holding the disk on the support table.

According to the present invention, the disk can be held by the spring force of the spring force generating means. Thus, there is no need to apply a force for holding the disk by external energy.

According to a twelfth aspect of the present invention, the table is rotatably driven by driving means having a coil and a driving magnet, and the table body is formed integrally with a magnet holder for holding the driving magnet.

According to the present invention, since the table main body and the magnet holder are formed integrally, the number of parts of the motor provided with the holding device can be further reduced, the assembling work can be further reduced, and the manufacturing can be further reduced. Cost can be reduced.

According to a thirteenth aspect of the present invention, there is provided a motor including the above-mentioned detachable disk holding device and a driving means for rotating the detachable holding device.

According to the present invention, it is possible to realize a motor in which the transmission of vibration to the disk is suppressed as described above, and the disk can be driven to rotate stably. Such a motor can be used, for example, as a motor for driving a recording medium disk to rotate, thereby enabling high-density recording.

[0037]

FIG. 1 is a sectional view showing a motor 21 having a removable disk holding device 20 according to an embodiment of the present invention. The motor 21 for rotating and driving the disk 22 is basically a detachable disk holding device (hereinafter simply referred to as a “holding device”) for holding the disk 22.
20 and a motor main body 23 which is a driving means for driving the holding device 20 to rotate. The holding device 20 is rotationally driven by the motor main body 23, whereby the disk 22 can be rotated. The disk 22 is a removable disk and is an MO in the present embodiment.

The motor 21 further includes a bracket 25 fixed to the body of the electric device, a substantially cylindrical bush 26 fixed to the bracket 25, sliding bearings 27 and 28 provided on the bush 26, 26, with its axis L
And a rotation shaft 29 rotatably supported around the rotation shaft 1.
In the present embodiment in which the disk 22 is a recording medium disk, the electric device is a recording device for reading and recording information on the disk 22. The sliding bearing has a sleeve 27 that receives a radial force and a plate 28 that receives a thrust force. The motor 21 is used, for example, with the axis L1 arranged parallel to the vertical direction. The motor 21 has a configuration provided coaxially with the rotation shaft 29. For ease of illustration, the axis of each component provided coaxially with the rotation shaft is also denoted by the same reference character "L".
1 ".

The holding device 20 is provided coaxially with the rotating shaft 29 in a state where one side in the axial direction is upward. The holding device 20 includes a disc-shaped table main body 30 having an insertion hole formed in the center, a plurality of support bases 31 projecting upward from the table main body at intervals in a circumferential direction, and a table main body 30.
And a fixed cylindrical portion 32 provided on an inner peripheral portion of the fixed cylindrical portion. The table main body 30, each support base 31, and the fixed cylinder portion 32 constitute a turntable 33. The turntable 33 is formed integrally, and is press-fitted and fixed coaxially to the rotation shaft 29 by the fixed cylinder portion 32. It is provided rotatable together with.

The motor body 23 has a stator 35 and a rotor 36. The stator 35 is configured such that a coil 38 is wound around a core 37 fixed by being fitted to the bush 26. The rotor 36 is configured such that a driving magnet 40 is held on an inner peripheral portion of a cylindrical magnet holder 39 integrated with the turntable 33. The driving magnet 40 faces the coil 38 from outside in the radial direction. When the coil 38 is excited, the rotor 36 rotates around the stator 35 by the coil 38, the driving magnet 40, and the magnetic action, and the turntable is turned. 33 is the rotating shaft 2
9 and is driven to rotate about the axis L1.

FIG. 2 is a plan view showing the turntable 33, and FIG. 3 is a perspective view showing the turntable 33. This turntable 33 is shown in FIG. 1 as viewed from the section line II of FIG. As described above, the turntable 33 and the magnet holder 39 are formed integrally, and the magnet holder 39 forms a peripheral wall, and the table body 30 is formed in a bottomed cylindrical shape that forms a bottom that closes the peripheral wall on the upper side. . These turntable 33 and magnet holder 39
A so-called cup-shaped member integrally covers the coil 38 and the driving magnet 40 from above and from the outside in the radial direction. The cup-shaped member is made of a magnetic material, for example, a metal such as ferromagnetic stainless steel.

In the outer peripheral region of the table body 30, a plurality of, in this embodiment, three
Are formed. Each of the insertion holes 43 has a circumferentially extending 2.
This is a shape formed by two arcs and two line segments extending in the radial direction.

Each support base 31 projects upward from the insertion hole 43 of the table body 30 so as to be continuous with a portion facing inward from the outside in the radial direction. Each support base 31 includes a turntable 33
Along the cylindrical surface around the axis L1, specifically, the same cylindrical surface as the magnet holder 39, a leg portion 44 rising from the table body 30, and a turntable bent radially inward from the upper end portion of the leg portion 44. A support portion 45 perpendicular to the axis L <b> 1 of 33 is provided, and a guide portion 46 that is bent downward from a radially inward single portion of the support portion 45 and inclines downward as it becomes radially inward. Thus, each support base 31
It is formed in a substantially L-shape.

FIG. 4 is a view for explaining the procedure for manufacturing the turntable 33. For ease of understanding, in FIG. 4, the same reference numerals as those in the completed configuration are given to the material portions corresponding to the respective configurations after completion. The turntable 33, specifically, a member in which the turntable 33 and the magnet holder 39 are integrated is formed by press molding.

First, as shown in FIG. 4A, an insertion hole 4 is formed in a bottom of a bottomed cylindrical material having a peripheral wall to be a magnet holder 39 and a bottom to be a turntable 33.
The cut groove 49 is formed in the outer peripheral portion of the region where the third region 3 is formed, on both sides in the circumferential direction and on the inner side in the radial direction. The cut groove 49 is substantially U-shaped as illustrated by using imaginary lines in FIG. 2, and is formed around a portion where each support base 31 is to be formed.

After forming the cut grooves 49 in this manner,
As shown in FIG. 4B, a portion where each support base 31 is to be formed is raised and raised. Next, as shown in FIG. 4C, the upper portion of the raised portion is bent inward in the radial direction except for a portion to be the leg 45. Further, as shown in FIG. 4 (4), the tip of the bent portion is
It is bent downward leaving a portion to be the support portion 46.
In this way, the support base 31 is formed, and the table body 30 and the magnet holder 39 in which the insertion holes 43 are formed can be formed.

Referring again to FIG. 1, the holding device 20 including such a turntable 33 includes an aligner 50 as an aligning means and a holding magnet 5 as a magnetic force generating means.
1 is further included. The aligner 50 is an annular member, and is located above the fixed cylindrical portion 32 of the turntable 33.
It is press-fitted and fixed to the rotating shaft 29 coaxially. This aligner 50
Are centering holes 53 whose outer diameter is formed in the center of the disk 22.
Positioning portion 54 on the outer peripheral surface of the cylinder slightly smaller than the inner diameter of
And a frusto-conical guide portion 55 on the outer peripheral surface of the frusto-conical cone which is formed so as to be connected to the upper portion of the positioning portion 54 and tapered upward.
And

The holding magnet 51 is a ring-shaped plate-shaped magnet that generates a magnetic force as a holding force for holding the disk, and is adhered on the table body 30 on the radially inner side of each support table 31. Fixed. The holding magnet 51 generates a magnetic attraction force acting between the attraction member 56 made of a magnetic material provided on the disk 22 as a magnetic force for holding the disk.

As described above, the holding device 20, the rotor 3
6 and the rotating shaft 29 together constitute a rotating body that rotates. In this rotating body, the rotating shaft 29 is supported by the respective sleeves 27 and the plate 28, but such support alone does not prevent the remaining structure from being pulled upward. Therefore, in the present embodiment, a stopper 58 is provided for preventing the above-mentioned detachment. The retaining ridge 5 projects radially outward from the upper end of the bush 26 and extends all around in the circumferential direction.
9 and a plurality of, in this embodiment, three locking claws 60 integrally formed on the turntable 33. The locking claws 60 are locked to the locking ridges 59 to prevent the rotating body from coming off.

In the inner peripheral area of the table body 30, three through-holes 61 are formed at equal positions in the circumferential direction at positions displaced in the circumferential direction with respect to the respective insertion holes 43 in order to prevent a reduction in strength. I have. Each locking claw 60 is formed so as to protrude downward so as to be continuous with a portion facing each through hole 61 of the table body 30 from the outside in the radial direction. These locking claws 60 can be formed by substantially the same press working as in the case of each support base 31.

In the motor 21, the holding device 20 mounts the disk 22 on the support portion 46 of each support base 31 to support the disk 22 from below. Attach to the disk 22
Can be held. In holding the disk 22, the guide 22 guides the disk 22, the positioning part 55 positions the disk 22 in the radial direction, and is aligned by the aligner 50 so that the disk 22 is coaxial with the holding device 20. You. By rotating the holding device 20 with the motor main body 23 while holding the disk 22 by the holding device 20 in this manner, the disk 22 can be driven to rotate around its axis.

Further, according to the holding device 20, each support 31
This eliminates the need for the work of attaching the to the table main body 30, and reduces the number of assembling man-hours, thereby reducing the labor, improving the assembling efficiency, facilitating the manufacture, and reducing the cost. In addition, the number of components interposed between the body on which the motor 21 is mounted and the disk 22 can be reduced, and the disk support position affected by assembly errors of the respective components, and therefore, the positional accuracy of the support portion 46 can be increased. be able to. Conversely,
Compared to a case where each support base 31 and the table main body 30 are separated, the dimensional accuracy of each component is low, and even when the components are assembled with low assembly accuracy using low assembly technology, high positional accuracy of the support portion 46 can be obtained. . In this way, the structure of the motor 21 is simplified, the purpose of increasing the accuracy of the assembled motor is achieved, and the number of components caused by the position of the support portion 46 is reduced to increase the accuracy of the disk position. Can be.
Further, the weight of the motor can be reduced.

Further, instead of forming a support base extending all around in the circumferential direction, three support bases are formed at intervals in the circumferential direction, and a portion where high accuracy of the shape and dimensions of the turntable 33 is required. Clearly and collectively, the productivity of the press-integrated turntable can be enhanced. 3
By forming two support bases 31 at equal intervals in the circumferential direction, stable support of the disc 22 is realized,
The contact area with the disk 22 can be reduced, and the vibration force transmitted from the motor 21 to the disk can be reduced. Thereby, the disk 22 can be rotated stably. As the holding device 20 is rotated, each support base 31 and each insertion hole 43 allow the holding device 20 to rotate.
The effect of stirring the surrounding air is obtained, the effect of cooling the surrounding members is obtained, and the heat generated by the motor can be easily released. In the present embodiment, each through hole 61 also
A stirring effect can be obtained.

Since each support 31 is L-shaped, press forming is possible. Moreover, by forming the leg 45 supporting the support 46 into an arc shape, as shown in FIG.
Even with the disk 22 having a small radial width in a region where the disk can be brought into contact with the support table 31, a support surface having a sufficient area for stable support can be secured. In other words, when the disk 22 can be brought into contact with the support base 31 only in the annular area S1 indicated by oblique lines, the support part 46 does not protrude from the area S1 on the support base 31 having the flat leg 45. In order to achieve this, the support portion 46 becomes smaller as shown by the imaginary line S2, and a sufficient support area cannot be obtained. If it does, it will come out of the area S1. If the leg 45 is formed in an arc shape as described above, the support portion 46 can be formed along the region S1 and a sufficient area of the support surface can be secured. Further, if the leg 45 is formed in a cylindrical shape, the rigidity against an external force in the axial direction is increased, and
2 can be more reliably and stably supported.

The dimensions of each support base 31 are determined so that a support area capable of stable support can be obtained without being deformed by a load (force) acting on each support portion 46. . Since the radial width D1 of the support portion 46 is determined based on the contactable area S1 of the disk 22 as described above, the support portion 46 can provide a sufficient support area.
Is determined. Based on this, the insertion hole 43 is set based on the distance between the disk 22 and the table body 30.
Is uniquely determined in the radial direction D2 and the angle range θ2. In the present embodiment, the angle range θ of the insertion hole 43
2 is 45 degrees, which is formed in a region slightly more than one third in the circumferential direction to enable stable support.

Further, since each support base 31 has the guide portion 47, not only can the disk be guided to a coaxial position when the disk 22 is mounted, but also when the disk 22 is detached, the support base 31 of the disk 22 can be moved to the same position. Can be prevented from being caught. In this way, when each support base 31 rises from the outside of the insertion hole 43, it opens to the magnet holder 39 forming the peripheral wall of the rotor 36, so that the drive magnet 40 is not exposed, and Lines of magnetic force generated by the magnet 40 are prevented from leaking radially outward from the rotor 36, and the stator 35
Thus, it is possible to prevent the magnetic balance from being disturbed, and to ensure stable rotational driving.

FIG. 6 is a plan view showing a part of a holding device 20A according to another embodiment of the present invention. The holding device 20A of this embodiment is similar to the holding device 20 of FIGS. 1 to 5, and corresponding components having the same functions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, each support 31
Is formed in an L-shape by rising upward in connection with a portion facing the insertion hole 43 from one side in the circumferential direction to the other side, and bending in the other direction in the circumferential direction. The leg 45 is curved so as to be concave toward the insertion hole 43 in order to obtain high rigidity. The holding device 20A and the motor 21 including the same also achieve the same effect. In particular, the present embodiment is suitable for a disk 22 having a sufficient radial width in an area where the disk 22 to be held can be brought into contact with the support table 31.

FIG. 7 is a plan view showing a part of a holding device 20B according to still another embodiment of the present invention. The holding device 20B of this embodiment is similar to the holding device 20 of FIGS. 1 to 5, and corresponding components having the same functions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, each support base 31 is connected to a portion facing outward from the radially inner side to the insertion hole 43, rises upward, bends radially outward, and is formed in an L-shape. The leg 45 has a cylindrical shape along the circumferential direction. Such a holding device 20B and the motor 21 including the same achieve the same effect.

FIG. 8 is a plan view showing a part of a holding device 20C according to still another embodiment of the present invention. The holding device 20C of this embodiment is similar to the holding device 20 of FIGS. 1 to 5, and corresponding components having the same functions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, each insertion hole 43 is formed not only in the table main body 30 but also in the magnet holder 39, and each support base 31 is provided with the insertion hole 4.
3 and rises upward in connection with a portion facing outward from the radially inner side, and is bent outward in the radial direction to form an L-shape. The leg 45 has a cylindrical shape along the circumferential direction. Such a holding device 20C and the motor 21 including the same achieve the same effect. Particularly, in the present embodiment, since there is no opening in the table body 33, a so-called face-to-face motor in which a driving magnet 40 is disposed here and a stator 35 is disposed at a position facing the driving magnet 40 in the axial direction. Is suitably configured as the motor main body 33.

FIG. 9 is a plan view showing a part of a holding device 20D according to still another embodiment of the present invention. The holding device 20D of this embodiment is similar to the holding device 20 of FIGS. 1 to 5, and corresponding components having the same functions are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, each insertion hole 43 is formed not in the table main body 30 but in the magnet holder 39, and each support base 31 is connected to a portion facing the insertion hole 43 from the upper side to the lower side and rises upward to form a radius. It is bent inward in the direction to form an L-shape. Such a holding device 20D and the motor 21 including the same also achieve the same effect. In the present embodiment, it is preferable that the motor body 33 is a surface-facing motor.

Each of the holding devices 20A to 20 shown in FIGS.
D is formed by pressing in the same manner as the holding device 20 of FIGS. 1 to 5, and a part of the material is pulled up to form the respective support bases 31 and the insertion holes 43. As described above, the configuration of each support base 31 can be changed as appropriate, and a configuration suitable for the disk 22 or the motor can be made according to the type of the disk 22 or the motor to be held.

FIG. 10 is a sectional view showing a part of a motor 21E having a holding device 20E according to still another embodiment of the present invention. FIG. 11 is a plan view showing the holding device 20E. The holding device 20E according to this embodiment has the structure shown in FIGS.
Corresponding components that are similar to the holding device 20 and have the same functions are denoted by the same reference numerals, and description thereof will be omitted. The motor 21E of the present embodiment is a motor for rotating and driving the FD as the disk 22. In the present embodiment, each insertion hole 43 is formed in the inner peripheral area of the table main body 30,
Each of the support bases 31 rises upward in connection with a portion facing the inside from the radially outer side of the insertion hole 43, and is bent radially inward to form an L-shape. The holding magnet 51 is provided on the radially outer side of each support base 31 by fitting the center hole of the magnet 51 to the side wall of the leg 45. In the FD drive motor 21E, since each support 31 is provided at a position close to the rotating shaft 29, a function such as disk guidance is not required.
Need not be included. Such a holding device 20E and a motor 21E having the same also achieve the same effect.

FIG. 12 is a sectional view showing a part of a motor 21F provided with a holding device 20F according to still another embodiment of the present invention. FIG. 13 is a plan view showing the holding device 20E. The holding device 20F according to this embodiment has the structure shown in FIGS.
Corresponding components that are similar to the holding device 20 and have the same functions are denoted by the same reference numerals, and description thereof will be omitted. The motor 21F of the present embodiment is a thin motor for rotatingly driving a CD, a DVD, or the like as the disk 22.
In the present embodiment, each support base 31 does not need to have the guide part 47, but in order to support the disk 22 so as not to slide, the support part 46 is made of a material having a large coefficient of friction such as rubber. An anti-slip member 70 is provided.

In the present embodiment, in order to hold the disk 22 having no portion made of a magnetic material such as the CD, the disk locking device which is a spring force generating means is used instead of the holding magnet 51. 72 are provided. A disk locking device 72 that generates a spring force as a holding force for holding the disk 22 is provided at the center of the turntable 33 so as to fit over the fixed cylindrical portion 32. This disk lock 7
2, two pressing members 73 are provided at equal intervals in the circumferential direction, and in this embodiment, three pressing members 73 are provided.

Each pressing member 73 has a locking piece 74 that is held so as to be displaceable in the radial direction, and a pressing spring 75 that applies a spring force to the locking piece 74 outward in the radial direction. Each locking piece 74 has a locking surface that is inclined outward in the radial direction as it goes upward, and the disk locking device 72 engages the disk 22 with the locking piece 74 by the spring force of the pressing spring 75. And the disk 22 can be held. In the present embodiment, the disc locking device 72 also functions as an aligner.
Such holding device 20F and motor 2 having the same
1F also achieves the same effect except for the effect of the holding magnet 51.

FIG. 14 is a plan view showing a part of a holding device 20G according to still another embodiment of the present invention. The holding device 20G of this embodiment is different from the holding device 20 of FIGS.
Corresponding components having similar functions are denoted by the same reference numerals, and description thereof is omitted. In the present embodiment, each insertion hole 43 is formed in a circular shape, and each support base 31 is
3 and protrudes upward from the entire circumference. Each support 31
Is cylindrical with a bottom, is connected to the table main body 30 at an open end, and has a cylindrical leg 45 serving as a peripheral wall and a flat supporting portion 46 serving as a bottom. Each of these supports 31
It can be formed by pressing three at equal intervals in the circumferential direction, specifically, drawing. The holding device 20 </ b> F and the motor 21 having the same also achieve the same effect except for the effect of improving the stirring performance by the insertion hole 43, and furthermore, the entire support table 31 itself and the entire turntable 33 including the table body 30. The rigidity can be increased and the disk 22 can be stably supported. Although the motor 21 of the present embodiment is not described in detail, a disk similar to the disk illustrated in FIGS. 1 to 5 can be used.
Since the support table 31 is formed by drawing, it is suitable when the height from the table body 30 to the support section 46 is low.

FIG. 15 is a sectional view showing a part of a motor 21F provided with a holding device 20H according to still another embodiment of the present invention. FIG. 13 is a plan view showing the holding device 20H. The holding device 20H according to this embodiment has the structure shown in FIGS.
Corresponding components that are similar to the holding device 20 and have the same functions are denoted by the same reference numerals, and description thereof will be omitted. The motor 21H of the present embodiment is a thick motor for rotatingly driving a CD, a DVD, or the like as the disk 22.
In the present embodiment, an anti-slip member 70 is provided as in the apparatus of FIGS.

In this embodiment, in order to hold the disk 22 having no portion made of a magnetic material such as the CD, a clamp body 80 having a non-sucking portion 81 made of a magnetic material is provided in a vertical direction. It is provided to be displaceable. The clamp body 80 is magnetically attracted downward by the holding magnet 51, and the disk 22 can be held by the turntable 33 and the clamp body 80 sandwiching the disk 22.

In this embodiment, the holding magnet 51 is provided on the aligner 50,
3 may be provided. The aligner 51 includes a plurality of (for example, three) claw pieces 85 which are elastically deformable in the radial direction.
Are provided at equal intervals in the circumferential direction, and are aligned by the spring force of the claw pieces 85. In the present embodiment, a retaining magnet 88 is provided instead of the retaining means 58, and the turntable 33 is magnetically attracted,
I'm keeping it. Such a holding device 20F and a motor 21F including the same also achieve the same effect.

The present invention is not limited to the above embodiments, but can be modified within the scope of the present invention. For example, two or four or more support bases 31 may be formed in the circumferential direction. In forming the turntable 33 integrally, instead of press molding (press processing), when using metal, die casting or casting may be used, and when using synthetic resin, molding may be used. May be used for molding. Depending on the type of the disk 22 and the like, the shape of each support 31, the molding direction, the shape of the turntable 33 including each support 31, the aligner 50, and the means for generating the holding force of the disk may be determined. Can be changed as appropriate.

[0071]

According to the first aspect of the present invention, it is possible to easily and inexpensively manufacture a detachable disk holding device (hereinafter simply referred to as a "holding device") while reducing the manufacturing labor. Further, transmission of vibration to the disk can be suppressed by reducing the contact area with the disk. Therefore, if a motor is configured using this holding device, it is possible to obtain a motor that can stably rotate the disk while suppressing the vibration force transmitted from the motor to the disk. Further, by rotating the holding device, an effect of stirring surrounding air is obtained, and a cooling effect of surrounding members is obtained. Therefore, if a motor is configured using this holding device, a motor that can easily release generated heat can be obtained.

According to the second aspect of the present invention, each support base capable of stably supporting the disk can be easily formed by bending. Further, the effect of stirring the air can be enhanced by the respective insertion holes.

According to the third aspect of the present invention, each support base capable of stably supporting the disk can be easily formed by bending. Further, the effect of stirring the air can be enhanced by the respective insertion holes.

According to the fourth aspect of the present invention, each support base capable of stably supporting a disk can be easily formed by bending. Further, the effect of stirring the air can be enhanced by the respective insertion holes.

According to the fifth aspect of the present invention, the rigidity of each support base and the entire member including the table body can be increased, and the disk can be stably supported. Moreover, since the disc is supported by the bottom of each support, the contact area with the disc can be reduced and high stability can be obtained.

According to the sixth aspect of the present invention, the table body and each support table can be formed easily and with high precision by press working.

According to the seventh aspect of the present invention, the table main body and each support base can be formed easily and with high precision by using a mold.

According to the eighth aspect of the present invention, the axis of the disk can be made to coincide with the axis of the table main body. Therefore, if the motor is formed using the holding device, the disk can be stabilized around the axis. Can be rotated.

According to the ninth aspect of the present invention, the structure for holding the disk can be simplified.

According to the tenth aspect of the present invention, even if the disk does not have a portion made of a magnetic material, the disk can be held by the magnetic force of the magnetic force generating means.

According to the eleventh aspect of the present invention, there is no need to apply a force for holding the disk by external energy.

According to the twelfth aspect of the present invention, the number of parts of the motor provided with the holding device can be further reduced, the labor for assembling work can be further reduced, and the manufacturing cost can be further reduced.

According to the thirteenth aspect of the present invention, it is possible to realize a motor in which transmission of vibration to a disk is suppressed. Such a motor can be used, for example, as a motor for driving a recording medium disk to rotate, thereby enabling high-density recording.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a motor 21 including a holding device 20 according to an embodiment of the present invention.

FIG. 2 is a plan view showing a turntable 33.

FIG. 3 is a perspective view showing a turntable 33.

FIG. 4 is a diagram showing a manufacturing procedure of the turntable 33.

FIG. 5 is a bottom view showing a support area S1 of the disk 22.

FIG. 6 is a plan view showing a part of a holding device 20A according to another embodiment of the present invention.

FIG. 7 shows a holding device 20 according to still another embodiment of the present invention.
It is a step view which shows a part of B.

FIG. 8 shows a holding device 20 according to still another embodiment of the present invention.
It is a step view which shows a part of C.

FIG. 9 shows a holding device 20 according to still another embodiment of the present invention.
It is a step view which shows a part of D.

FIG. 10 shows a holding device 2 according to still another embodiment of the present invention.
It is sectional drawing which shows the motor 21E provided with 0E.

FIG. 11 is a plan view showing a holding device 20E.

FIG. 12 shows a holding device 2 according to still another embodiment of the present invention.
It is sectional drawing which shows the motor 21E provided with OF.

FIG. 13 is a plan view showing a holding device 20F.

FIG. 14 shows a holding device 2 according to still another embodiment of the present invention.
It is a step view showing a part of 0G.

FIG. 15 shows a holding device 2 according to still another embodiment of the present invention.
It is sectional drawing which shows the motor 21H provided with 0H.

FIG. 16 is a cross-sectional view showing a motor 2 including a conventional turntable 1;

[Explanation of symbols]

 20, 20A to 20H Holding device 21, 20E, 20F, 20H Motor 22 Disk 23 Motor main body 30 Table main body 31 Support base 33 Turntable 43 Insertion hole 45 Leg 46 Supporting unit 47 Guide unit 50 Aligner 51 Holding magnet 70 Disc stopper 80 Clamp body L1 Axis

Continued on the front page (72) Inventor Satoshi Ueda 248 Nakajuku, Aichigawa-cho, Aichi-gun, Aichi-gun, Shiga Prefecture Nidec Corporation Shiga Technology Development Center F-term (reference) 5D109 BA14 BA17 BA20 5D138 RA05 RA08 TA07 TA17 TA23 TA32 5H019 AA06 AA10 CC04 CC09 DD01 EE01 FF01 FF03 GG00 GG01 5H621 GA04 HH01 JK08 JK11 JK15 JK19

Claims (13)

[Claims] 1. An attachment / detachment comprising: a disk-shaped table main body; and a plurality of support bases formed integrally with the table main body and projecting in one axial direction from the table main body at intervals in a circumferential direction. Type disk holding device. 2. The table main body has a plurality of insertion holes, and the support stand is formed in a substantially L-shape by projecting continuously from a portion facing the insertion hole of the table main body from a radially outward side. 2. The removable disk holding device according to claim 1, wherein: 3. The table main body has a plurality of insertion holes, and the support base is formed in a substantially L-shape so as to project from a portion facing the insertion hole of the table main body from the radially inner side. 2. The removable disk holding device according to claim 1, wherein: 4. The table body has a plurality of insertion holes, and the support stand is formed in a substantially L-shape by projecting continuously from a portion facing the insertion hole of the table body from one side in the circumferential direction. 2. The removable disk holding device according to claim 1, wherein: 5. The removable disk holding device according to claim 1, wherein the support base is formed in a bottomed cylindrical shape connected to a table body at an open end. 6. The removable disk holding device according to claim 1, wherein the table main body and each support table are formed by press working. 7. The removable disk holding device according to claim 1, wherein the table main body and each support base are formed using a mold. 8. The removable disk holding device according to claim 1, further comprising an aligning means for aligning the axis of the disk to be held with the axis of the table body. 9. The removable disk holding device according to claim 1, further comprising magnetic force generating means for generating a magnetic force for supporting and holding the disk on a support table. 10. The removable disk holding device according to claim 9, wherein the magnetic force generating means includes a clamp body that is displaceable in the axial direction, and holds the disk by magnetically attracting the clamp body. 11. The removable disk holding device according to claim 1, further comprising a spring force generating means for generating a spring force for supporting and holding the disk on a support base. 12. The apparatus according to claim 1, wherein the table is rotatably driven by driving means having a coil and a driving magnet, and the table body is formed integrally with a magnet holder for holding the driving magnet.
12. The removable disk holding device according to any one of claims 11 to 11. 13. A motor comprising: the removable disk holding device according to claim 1; and a drive unit for rotating and driving the removable holding device.