JP3810304B2 - Disc selection type disc device using a rotating shaft support device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, among the support portions, a disc selected disc apparatus using the rotary shaft support equipment which rotary shaft is rotatably supported with the gear.
[0002]
[Prior art]
FIG. 6 is a cross-sectional view showing a rotary shaft support device provided in a conventional disk selection type disk device.
[0003]
In the disk device 50, a shaft 51 is fixed between an upper chassis 50A and a lower chassis 50B, and a rotating shaft 52 is rotatably supported on the outer periphery of the shaft 51. The shaft 51 is made of metal, and is fixed by caulking outside the chassis 50A and 50B. The rotating shaft 52 is made of synthetic resin, and a gear 52b is integrally formed at one end.
[0004]
A plurality of the shaft 51 and the rotating shaft 52 are provided in the stock portion of the disk device, and a spiral groove 52 a is formed on the outer surface of each rotating shaft 52. The spiral groove 52a has a coarse pitch at the center of the rotating shaft 52, and the pitch is dense at the upper end and the lower end of the rotating shaft 52. The holding member 53 that supports the disk D includes a groove 53c that holds the disk D, and a plurality of holes 53b that are inserted into the outer circumferences of the respective rotary shafts 52. A protrusion 53 a is provided on the inner peripheral portion of the hole 53 b, and the protrusion 53 a is engaged with the spiral groove 52 a formed on the rotating shaft 52.
[0005]
When rotational power is applied to the gears 52b of the respective rotation shafts 52 from a rotation driving means (not shown), the respective rotation shafts 52 rotate together in synchronization with each other. At this time, the holding member 53 can move up and down, and the selected holding member 53 is moved to an approximately middle position between the upper chassis 50A and the lower chassis 50B and stopped.
[0006]
A disk D supplied from an opening (not shown) is carried in by a disk transport device, and is supplied to and held in the groove 53c of the selected holding member 53. When driving the disk, the holding member 53 that supports the disk to be driven is moved to the selected position. Then, the disk is pulled out from the holding member 53 or is supported by the holding member 53, and the disk is clamped and driven by the rotary table of the drive unit.
[0007]
[Problems to be solved by the invention]
Since the rotary shaft 52 used in the conventional disk device 50 is a molded part formed of synthetic resin, the resin expands and contracts due to a temperature change, and as a result, the rotary shaft 52 expands and contracts in the axial direction. In particular, in the case of the in-vehicle disk device 50, the interior of the vehicle may become quite hot. In such a case, the rotating shaft 52 is thermally expanded and extends in the axial direction. For example, when the shaft length of the rotating shaft 52 is 50 mm, when the temperature rises to near 100 ° C., the amount of elongation of the rotating shaft 52 in the axial direction increases to about 0.5 mm.
[0008]
Therefore, in the disk device 50, assuming that the predicted use temperature is the highest, and considering the amount of elongation of the rotary shaft 52 at this time, the rotary shaft 52 with respect to the interval between the upper chassis 50A and the lower chassis 50B. Is shortened by δ0. As a result, between the upper chassis 50A and the lower chassis 50B, the rotation shaft 52 is swayed in the axial direction having the dimension of δ0 at the maximum.
[0009]
Therefore, when external vibration is applied, each rotary shaft 52 generates a rattling sound in the axial direction, and the meshing state between the gear 52b and the gear meshing with the gear 52b becomes unstable.
[0010]
Further, as a result of the rotation shaft 52 becoming shaky in the axial direction, the vertical movement of the holding member 53 guided by the spiral groove 52a becomes unstable. For this reason, when the holding member 53 is moved to the selected position and stopped, the stop height is not stable, and the disk D loaded by the conveying means is not reliably mounted in the groove 53c of the holding member 53. Furthermore, there is a possibility that a problem such as that the disk D supported by the holding member 53 stopped at the selected position is not securely clamped to the drive unit may occur.
[0011]
DISCLOSURE OF THE INVENTION The present invention solves the above-described conventional problems, can reduce the shakiness of the rotating shaft, can support the rotating shaft with a simple structure, and can select the disk stably. It is an object of the present invention to provide an optical disk device.
[0012]
[Means for Solving the Problems]
The present invention is rotatable between a first support part and the second supporting portion, wherein the second support portion and the first support portion provided spaced from one another in a metal chassis A rotating shaft made of synthetic resin supported by the rotating shaft , a gear provided on the rotating shaft and a spiral portion provided on the outer periphery of the rotating shaft, and a plurality of holding members that support the disc and engage with the spiral portion And a rotation driving means for rotating the rotation shaft via the gear,
In the disk selective disk device in which any one of the holding members is moved to the selected position by the spiral when the rotating shaft rotates, and the disk held by the holding member at the selected position is driven by the disk drive unit .
One end portion of the rotation shaft is opposed to the first support portion, and the other end portion of the rotation shaft is opposed to the second support portion,
The shaft body of the fixing member having a flange portion and a shaft body is inserted into a hole formed in the first support portion, and the shaft body is coaxially fixed to one end portion of the rotating shaft, said first support portion in a surface which is provided on the rotary shaft and said flange portion is pinched, rotatably supported the rotary shaft is regulated amounts backlash in the axial direction thereof,
The second support part is provided with a support protrusion protruding inward, and the other end of the rotating shaft is rotatably supported in a state of being restricted in the radial direction with respect to the support protrusion. And
A gap is formed between the other end of the rotating shaft and the second support portion to allow deformation of the rotating shaft in the axial direction.
[0013]
In this rotating shaft support device, since one end of the rotating shaft is rotatably supported in a restricted state, the end surface of the rotating shaft and the supporting portion are taken into account in consideration of thermal expansion in the axial direction of the rotating shaft. Even if a gap is formed between the rotation axis and the rotation axis, it is possible to prevent the rotation shaft from shaking in the axial direction.
[0014]
Further, one end portion of the rotating shaft is located in the hole, the shaft body is screwed to the rotating shaft, and one end portion of the rotating shaft is abutted against the flange portion, The first support portion is sandwiched between the surface provided at a position away from one end portion of the rotation shaft and the flange portion.
[0015]
Further, the first support portion is provided with a cylindrical protrusion that protrudes inward from the periphery of the hole , and the rotating shaft is formed with a sliding inner surface facing the outer peripheral surface of the protrusion. The rotating shaft is regulated in the radial direction by the outer peripheral surface of the protrusion and the sliding inner surface, and can be configured to be rotatably supported .
[0016]
In this structure, if the outer peripheral surface of the protruding portion and the sliding inner surface slide at low temperatures, the sliding inner surface expands in a higher temperature environment. The dynamic load will not increase. Therefore, the shakiness of the rotating shaft in the radial direction can be reduced at a low temperature or a normal temperature.
[0017]
In addition, the support protrusion provided on the second support portion has a short shaft shape, and a hole is formed in the other end portion of the rotation shaft, and the support protrusion is inserted into the hole. can do.
[0018]
However, a hole may be formed inside the support protrusion, and the other end of the rotating shaft may be inserted into the hole.
[0019]
The second support portion is formed of a sheet metal, and the support protrusion is formed in a simple process when the support protrusion is integrally formed by deforming the sheet metal inward. be able to.
[0021]
In the disk selection type disk device using the rotating shaft support device, rattling in the axial direction of the rotating shaft that transports the holding member can be suppressed, so that rattling noise is less likely to be generated, and the holding of the disk is supported. The member can be moved stably.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view showing the external appearance of the internal structure of a disk device using the rotary shaft support device of the present invention, FIG. 2 is a schematic side view showing the overall structure and operation of the disk device, and FIG. 4 is a bottom view when the holding member is viewed from below, FIG. 4 is a cross-sectional view showing the rotary shaft support device cut along line IV-IV in FIG. 3, and FIG. 5 is a partially enlarged cross-sectional view of FIG. . In FIG. 1, the disk device is shown upside down.
[0023]
The disk device 1 shown in FIGS. 1 and 2 is a disk selection type disk device that can store six disks D inside the device. In the disk device 1, a CD (compact disk) and a DVD (digital versatile disk) having a diameter of 12 cm can be loaded.
[0024]
As shown in FIG. 2, the disk device 1 has an opening 3 formed in a panel provided on the front surface of a metal chassis 2, and a disk D is inserted into the chassis 2 from the opening 3. Also, it is discharged from the chassis 2 to the outside. As shown in FIG. 1, a guide member 26 and a transfer roller group 40 including a plurality of transfer rollers 31, 32, 33, and 34 are provided inside the chassis 2 as disk transfer means. The roller group 40 and the guide member 26 are provided to face each other. The disk D inserted through the opening 3 is sandwiched between the guide member 26 and the transfer roller group 40 and transferred into the chassis 2 by the rotational force of the transfer roller group 40. Further, the disk D in the chassis 2 can be discharged by the transfer roller group 40.
[0025]
In this disc apparatus 1, a plurality of discs can be inserted one by one from the opening 3, and each inserted disc is sent to the stock portion by the disc transport means, and a holding member provided in the stock portion 4 and stocked. As shown in FIG. 1, the stock section is installed in the back of the disk transport means.
[0026]
The stock portion is provided with a plurality of holding members 4 made of synthetic resin and formed in a bow shape, and the holding members 4 hold the semicircular portion on the back side in the insertion direction of the outer peripheral edge of the disc. It can be done. In the stock portion, a plurality of the holding members 4 are stacked in the vertical direction, and each holding member 4 is moved up and down by a plurality of rotary shaft support devices 10, 10, 10, 10 provided in the chassis 2. You are guided so that you can.
[0027]
As shown in FIGS. 2 and 4, each rotary shaft support device 10 is provided between an upper chassis 2 </ b> A (first support portion) that is a part of the chassis 2 and a lower chassis (second support portion) 2 </ b> B. Is arranged.
[0028]
Each rotating shaft support device 10 is provided with a long rotating shaft 5 extending between the upper chassis 2A and the lower chassis 2B. A spiral groove 5 a is formed on the surface of the rotating shaft 5. The protrusion 4a provided on the holding member 4 is engaged with the spiral groove 5a, and when the respective rotating shafts 5 are rotated in synchronization, the holding member 4 is moved in the vertical direction.
[0029]
The spiral groove 5 a has a rough pitch at the middle portion of the rotating shaft 5 and a dense pitch at the upper and lower portions of the rotating shaft 5. Therefore, when the rotating shaft 5 rotates and is guided by the spiral groove 5 a to move the holding member 4, the interval between the holding members is shortened on the upper end side and the lower end side of the rotating shaft 5, and the center of the rotating shaft 5 is reduced. The vertical distance of the holding member 4 is widened when moved to the section. As shown in FIG. 4, when the rotation member 5 is stopped when the holding member 4 reaches a predetermined position in the central portion of the rotation shaft 5, a wide space is formed above and below the holding member 4. The stop position of the holding member 4 at this time is the selection position (i).
[0030]
As shown in FIG. 4, a through hole 5 b penetrating in the axial direction is formed in the central portion of the rotating shaft 5. The upper chassis 2A, which is the first support portion, has a cylindrical protruding portion 12a formed toward the inside of the chassis 2, and a hole 12 is formed inside the protruding portion 12a. The upper chassis 2A is formed of a sheet metal, and the protrusion 12a is formed by deforming a part of the sheet metal inward.
[0031]
A disk-shaped small gear 15 for applying rotational power to the rotating shaft 5 from the outside is integrally molded with the upper end portion of the rotating shaft 5 with a resin. As shown in FIG. 5, an annular groove 16 is formed above the rotary shaft 5 between the upper end portion 14 of the rotary shaft 5 and the small gear 15 located outside thereof. And the said upper end part 14 is penetrated in the said hole 12 currently opened inside the said protrusion part 12a. A cylindrical sliding inner surface 15a is formed in the groove 16 so as to be coaxial with the center of the pitch circle of the small gear 15. The sliding inner surface 15a is connected to the outer peripheral surface 12a2 of the cylindrical protruding portion 12a. It can slide with the smallest clearance.
[0032]
The gap between the outer peripheral surface 14b of the upper end portion 14 of the rotating shaft 5 and the inner peripheral surface 12a1 of the cylindrical protruding portion 12a is less than the outer peripheral surface 12a2 of the protruding portion 12a and the sliding inner surface 15a. The gap is narrower. Therefore, in the upper part of the rotating shaft 5, the rotating shaft 5 can be prevented from rattling in the radial direction due to sliding between the outer peripheral surface 12a2 of the projecting portion 12a and the sliding inner surface 15a. The sliding surface between the outer peripheral surface 12a2 of the protrusion 12a and the sliding inner surface 15a can be rotated as a reference.
[0033]
When placed under a high temperature environment, the rotary shaft 5 and the small gear 15 made of synthetic resin are thermally expanded. At this time, the sliding inner surface 15a is deformed in a direction away from the outer peripheral surface 12a2 of the protruding portion 12a. Therefore, if the outer peripheral surface 12a2 of the projecting portion 12a and the sliding inner surface 15a can be slid without any gap at low temperatures, the outer peripheral surface 12a2 of the projecting portion 12a and the sliding surface can be used in a high temperature environment. The deformation is such that the sliding load with the inner surface 15a decreases. Therefore, in the normal temperature state, the gap between the outer peripheral surface 12a2 of the protruding portion 12a and the sliding inner surface 15a can be minimized, and as a result, the swing of the rotation center of the rotating shaft 5 can be suppressed.
[0034]
A screw member 13 that functions as a fixing member is provided on the outer surface side of the upper chassis 2A. The screw member 13 includes a shaft body 13a and a flange portion 13b that protrudes in a disk shape from one end of the shaft body 13a toward the periphery. The flange portion 13 b is formed larger than the opening size of the hole 12. An internal thread portion is formed at the upper end portion of the through hole 5 b of the rotating shaft 5 located in the hole 12. The shaft body 13a of the screw member 13 is formed with a male screw portion, and the shaft body 13a is inserted into the through hole 5b and the male screw portion and the female screw portion are screwed together. And the upper end part 14 of the rotating shaft 5 and the said screw member 13 are being fixed in the state which the lower surface 13b1 of the flange part 13b of the said screw member 13 contact | abutted with the end surface 14a of the said upper end part 14. FIG.
[0035]
At this time, as shown in FIG. 5, the dimension L2 between the upper surface 15b of the small gear 15 and the lower surface 13b1 of the flange portion 13b is set to be slightly larger than the plate thickness dimension L1 of the upper chassis 2A. Yes. Since the dimension L2 is larger than L1, the rotating shaft 5 can be rotated in a state where the screw member 13 is screwed to the upper end portion 14 of the rotating shaft 5.
[0036]
As shown in FIG. 4, the lower chassis 2 </ b> B that is the second support portion is provided with a short shaft-like support protrusion 11 that protrudes inside the chassis 2. The lower chassis 2B is made of sheet metal, and the support protrusion 11 is formed by pressing and deforming a part of the sheet metal. The center of the support protrusion 11 and the center of the hole 12 formed on the upper chassis 2A side are located on the same line. In the lower part of the rotating shaft 5, the lower end portion of the through hole 5 b is inserted through the outer periphery of the support protrusion 11. The inner surface of the through hole 5b and the outer peripheral surface of the support protrusion 11 can slide with little gap at low temperatures. As a result, the lower end portion of the rotary shaft 5 is moved in the radial direction by the support protrusion 11. It is regulated.
[0037]
Even at the lower end of the rotating shaft 5, the rotating shaft 5 is located on the outer periphery of the support protrusion 11, so that the inner surface of the through hole 5b expands in the radial direction even if the rotating shaft 5 thermally expands in a high temperature environment. Therefore, the sliding load with the support protrusion 11 does not increase at a high temperature. Further, since the through hole 5b slides with the outer peripheral surface of the support protrusion 11 at a minimum gap at a low temperature or a normal temperature, it is possible to suppress the occurrence of vibration of the rotating shaft 5 in the radial direction.
[0038]
In the rotary shaft support device 10, the upper end portion 14 of the rotary shaft 5 is regulated in the hole 12, and the amount of shakiness of the rotary shaft 5 in the axial direction depends on the dimension L2-L1, and The amount of rattling is extremely small. Also, as shown in FIG. 4, the axial dimension of the rotary shaft 5 is such that a gap δ is formed between the lower end surface 5c of the rotary shaft 5 and the upper surface of the lower chassis 2B at room temperature. The distance between the inner surfaces of the upper chassis 2A and the lower chassis 2B is shorter in advance.
[0039]
Therefore, even if the rotating shaft thermally expands in a high temperature environment and the rotating shaft 5 extends in the axial direction, the elongation can be allowed by the gap δ. Therefore, the gap δ is determined based on the amount of elongation of the rotating shaft 5 when the highest use environment temperature is assumed.
[0040]
As shown in FIG. 1, in the disk device 1, a large gear 18 is rotatably provided in the upper chassis 2 </ b> A, and a small gear 15 provided at the upper end of each rotary shaft 5 of each rotary shaft support device 10. The large gear 18 is engaged. The large gear 18 and a motor that rotationally drives the large gear 18 constitute a rotation driving means. When the large gear 18 is rotated by the motor, the plurality of rotating shafts 5 are rotated in synchronization.
[0041]
As shown in FIG. 3, in the holding member 4, a pair of holding arms 20 and a holding arm 30 are integrally connected by a connecting member 17 on the back side in the insertion direction of the disk D. The holding arm 20 is formed with insertion holes 4A and 4B penetrating in the Z direction at a predetermined interval on the front and rear, and the holding arm 30 is similarly formed with insertion holes 4C and 4D. The insertion holes 4A, 4B, 4C, and 4D are formed with the protrusions 4a that mesh with the spiral grooves 5a.
[0042]
The holding arm 20 is formed with upper support pieces 21 and 23 and lower support pieces 22 and 24 protruding in the circumferential direction toward the center So direction. The upper support pieces 21 and 23 project from the upper side (Z2 side) of the disk facing surface 20A in the center So direction, and the lower support pieces 22 and 24 extend from the lower side (Z1 side) of the disk facing surface 20A to the center So direction. Is formed to protrude.
[0043]
The holding arm 30 is formed with five support pieces 31, 32, 33, 34 and 35. Of these, the upper support pieces 31 and 33 are in the center So direction from the upper side (Z2 side) of the disk facing surface 30A, and the lower support pieces 32, 34 and 35 are from the lower side (Z1 side) of the disk facing surface 30A. Protrusions are formed.
[0044]
As a result, the outer peripheral edge of the disk D can be held so as to be sandwiched from above and below by the upper support pieces 21, 23, 31, 33 and the lower support pieces 22, 24, 32, 34, 35. It has become.
[0045]
As shown in FIGS. 2 and 3, the disk device 1 is provided with a drive unit 6 at a position in front of the stock portion provided with the holding member 4. A turntable 7 and an optical pickup 8 are mounted on the drive unit 6. The drive unit 6 is provided so as to move horizontally in the chassis 2 in the front-rear direction without changing the position in the height direction in the chassis 2.
[0046]
Although not shown, a moving means for moving the drive unit 6 horizontally is provided in the chassis 2. The drive unit 6 is equipped with a spindle motor that rotationally drives the turntable 7. The center hole of the disk D is mounted on the turntable 7 and clamped.
[0047]
The optical pickup 8 includes a light-emitting element, a light-receiving element, and various optical components, and is provided with an objective lens facing the disk D. The drive unit 6 is provided with a thread mechanism that moves the optical pickup 8 in the radial direction of the disk D.
[0048]
In the disk device 1, each rotating shaft 5 rotates, and the plurality of holding members 4 are moved up and down by the spiral groove 5a. When any of the selected holding members 4 moves to the selection position (i) shown in FIG. 4, the rotating shaft 5 is stopped, and the holding member 4 stops at the selection position (i).
[0049]
At this time, the selected holding member 4 coincides with the disc conveyance height by the guide member 26 and the transfer roller group 40. Therefore, the disk can be supplied and held on the holding member 4 stopped at the selected position (i), and the disk can be carried out from the holding member 4 stopped at the selected position.
[0050]
When the holding member 4 stops at the selected position (i), the drive unit 6 moves below the disk held by the holding member 4 and the center hole of the disk D held by the holding member 4 The disk is slightly transferred in the Y2 direction by the guide member 26 and the transfer roller group 40 until the disk is positioned on the turntable 7, and is clamped to the turntable 7. In this way, the disk D is rotationally driven in a state where the restraint of the disk from the holding member 4 is released.
[0051]
In the rotary shaft support device 10, since the rotary shaft 5 has a structure that is less likely to rattle in the axial direction, rattling noise generated from the plurality of rotary shafts 5 when external vibration is applied can be almost eliminated. . Further, since the amount of free movement of the rotary shaft 5 in the axial direction is small, the holding member 4 can be guided in the vertical direction with high accuracy by the spiral groove 5a. Further, when the holding member 4 is stopped at the selected position (i), the stop position is less likely to be out of order. Therefore, when the disc is carried by the disc transport means, the disc can be reliably supplied to the holding member 4 located at the selected position (i), and the disc D held by the holding member 4 located at the selected position (i). Can be reliably clamped in the drive unit 6.
[0052]
Furthermore, after attaching the rotating shaft 5 to the upper chassis 2A with the screw member 13, by integrating the upper chassis 2A and the lower chassis 2B, the lower end portion of the rotating shaft 5 can be centered, A conventional caulking work or the like is unnecessary, and the assembling workability is good, and the disassembling work at the time of maintenance or the like is facilitated.
[0053]
The protruding portion 12a provided on the upper chassis 2A may be fixed to the lower surface of the upper chassis 2A formed by a member separate from the upper chassis 2A. The support protrusion 11 provided on the lower chassis 2 </ b> B may have a cylindrical shape surrounding the outer periphery of the rotation shaft 5. The support protrusion 11 is also formed separately from the lower chassis 2B and may be fixed to the lower chassis 2B.
[0055]
【The invention's effect】
In the rotary shaft support device of the present invention described above, the rotary shaft having gears is made of synthetic resin, and even if it is thermally expanded, the axial dimension change due to the expansion can be allowed. Tack can be suppressed. Therefore, it is possible to prevent rattling noise due to vibration and to always set the meshing of the gears optimally.
[0056]
In the disk device of the present invention, the height of the holding member that holds and moves the disk can be always controlled accurately.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an internal structure of a disk selection type disk device using a rotating shaft support device;
FIG. 2 is a schematic side view showing the internal structure of the disk device;
FIG. 3 is a bottom view showing a holding member for holding a disc;
4 is a cross-sectional view of the rotary shaft support device taken along line IV-IV in FIG. 3;
FIG. 5 is a partially enlarged view of FIG.
FIG. 6 is a cross-sectional view showing a rotary shaft support device used in a conventional disk device;
[Explanation of symbols]
1 disk device 2 chassis 2A upper chassis (first support part)
2B Lower chassis (second support part)
DESCRIPTION OF SYMBOLS 3 Opening part 4 Holding member 4a Protrusion 5 Rotating shaft 5a Spiral groove 5b Through hole 6 Drive unit 7 Turntable 8 Optical pick-up 10 Rotating shaft support apparatus 11 Support protrusion 12 Hole 12a Cylindrical protrusion 13 Screw member (fixing member)
13a Shaft body 13b Flange portion 14 Upper end portion 15 of rotating shaft Small gear 15a Sliding inner surface 18 Large gear

Claims (5)

A first support portion and a second supporting portion provided spaced from one another in a metal chassis, which is rotatably supported between said first supporting portion and the second supporting portion A rotating shaft made of synthetic resin , a gear provided on the rotating shaft and a spiral portion provided on an outer periphery of the rotating shaft, a plurality of holding members that support a disk and engage the spiral portion, and the gear Rotation drive means for rotating the rotation shaft via,
In the disk selective disk device in which any one of the holding members is moved to the selected position by the spiral when the rotating shaft rotates, and the disk held by the holding member at the selected position is driven by the disk drive unit .
One end portion of the rotation shaft is opposed to the first support portion, and the other end portion of the rotation shaft is opposed to the second support portion,
The shaft body of the fixing member having a flange portion and a shaft body is inserted into a hole formed in the first support portion, and the shaft body is coaxially fixed to one end portion of the rotating shaft, said first support portion in a surface which is provided on the rotary shaft and said flange portion is pinched, rotatably supported the rotary shaft is regulated amounts backlash in the axial direction thereof,
The second support part is provided with a support protrusion protruding inward, and the other end of the rotating shaft is rotatably supported in a state of being restricted in the radial direction with respect to the support protrusion. And
A disc selection type disc apparatus , wherein a gap allowing deformation in the axial direction of the rotary shaft is formed between the other end portion of the rotary shaft and the second support portion. One end portion of the rotating shaft is positioned in the hole, the shaft body is screwed to the rotating shaft, and one end portion of the rotating shaft is abutted against the flange portion, and the rotating shaft 2. The disk selective disk apparatus according to claim 1, wherein the first support part is sandwiched between the surface provided at a position away from one end of the flange and the flange part. Wherein the first support portion, a cylindrical protrusion is provided protruding from the periphery of the hole to the inside, the the rotation shaft is slid inside surface is formed to face the outer peripheral surface of the projecting portion 3. The disk selection type disk device according to claim 1, wherein the rotation shaft is regulated in a radial direction by the outer peripheral surface of the protrusion and the sliding inner surface and is supported rotatably . The support protrusion provided on the second support portion has a short shaft shape, and a hole is formed in the other end portion of the rotating shaft, and the support protrusion is inserted into the hole. 4. The disk selection type disk device according to any one of 3) . 5. The disk selection type disk device according to claim 1, wherein the second support portion is formed of a sheet metal, and the support protrusion is integrally formed by deforming the sheet metal inward .

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