WO2009087771A1

WO2009087771A1 - Disc device

Info

Publication number: WO2009087771A1
Application number: PCT/JP2008/050195
Authority: WO
Inventors: Takeshi Hamada; Takeshi Kadowaki; Hideo Ito
Original assignee: Pioneer Corporation
Priority date: 2008-01-10
Filing date: 2008-01-10
Publication date: 2009-07-16

Abstract

A projecting portion (152) is in point contact with a sliding portion (51) at a spherical surface portion (152C) which is spherically formed. Due to a less contact area, the variation in frictional force is reduced and hence the stick-slip phenomenon hardly occurs. Because of this reason, clattering, vibration, noise, etc. of a tray (50) can be prevented during transportation. Moreover, since there is no variation in contact area among products, vibration, noise, etc. can be suppressed in all the products.

Description

Disk unit

The present invention relates to a disk device.

2. Description of the Related Art Conventionally, a disk device having a configuration in which a recording medium is placed on a tray and transported is known (for example, see Patent Document 1).

For example, the tray 50 of the disk device is supported by the chassis 15 so as to be able to advance and retreat in the horizontal direction, as shown in FIG.
In such a disk device, as shown in FIG. 1, the tray 50 is pulled out from the chassis 15 to the front surface (lower right in FIG. 1), and a recording medium such as the optical disk 200 is placed thereon. In this state, the tray 50 is moved back and forth. Then, the optical disk 200 can be transported to the inside of a disk device constituted by a case body (not shown) and the chassis 15.

JP 2004-95037 A

However, in the conventional disk device as described in Patent Document 1, when the optical disk 200 is transported into the disk device or when the tray 50 is transported into the disk device, the tray 50 flutters due to the stick-slip phenomenon. The problem of generating vibration, noise, etc. is an example.

In FIG. 1, the tray 50 includes a longitudinal plate-like sliding portion 51 on both side edges. On the other hand, a guide portion 151 that abuts the sliding portion 51 and guides the tray 50 in the conveyance direction of the optical disc 200 is provided on the front inner side of the both side surface portions 15A of the chassis 15.
The guide 151 has a protrusion 152 and a front protrusion 153 provided on the front side of the protrusion 152.
Here, as shown in FIG. 1, when the tray 50 is pulled out to the front side, the load of the tray 50 is concentrated on the protrusion 152.

FIG. 2 is a cross-sectional view taken along the line II-II in FIG. As shown in FIG. 2, the protrusion 152 is in contact with the sliding portion 51.
Here, in order to reduce the contact area and smoothly move the tray 50 forward and backward, as shown in FIG. 3, the protrusion 152 is formed with a circumferential surface on the sliding portion 51 side (lower side in FIG. 3). May be. In this case, the protruding portion 152 and the sliding portion 51 are in line contact with each other.

It is preferable that the contact area between the protrusion 152 and the sliding part 51 (hereinafter simply referred to as a contact area) is always constant between the same products.
However, in the general resin tray 50, the side surface portion 15A may be formed in a slightly inclined state. Further, in the disk device assembly stage, the side surface portion 15A may be inclined for some reason.
In these cases, the protrusion 152 is displaced to the tray 50 side or the opposite side to the tray 50 in FIG. Then, the contact area increases or decreases.
As a result, variations occur in the contact areas of the individual disk devices.

∙ When only the disc or tray is transported, the contact area varies and the friction also varies due to the influence, so that the stick-slip phenomenon is likely to occur. Then, due to the stick-slip phenomenon, the tray 50 flutters during conveyance, and vibration and noise are generated.

An object of the present invention is to provide a disk device capable of stably transporting a tray in view of such problems.

The disk device of the present invention includes a chassis, a disk processing unit that is provided in the chassis and processes a disk-shaped recording medium, and a tray including a mounting surface on which the recording medium is mounted. The tray is a disk device that conveys the recording medium between a processing position where the disk processing unit can process the recording medium and an outer position where the recording medium is positioned outside the chassis, The tray includes a longitudinal sliding portion that is substantially parallel to the conveyance direction for conveying the recording medium, the chassis includes a guide portion that guides the tray in the conveyance direction, and the guide portion has a spherical shape. A protrusion having a spherical surface formed and in sliding contact with the sliding portion is provided.

The disk device of the present invention includes a chassis, a disk processing unit that is provided in the chassis and processes a disk-shaped recording medium, and a tray including a mounting surface on which the recording medium is mounted. The tray is a disk device that conveys the recording medium between a processing position where the disk processing unit can process the recording medium and an outer position where the recording medium is positioned outside the chassis, The tray includes a longitudinal sliding portion that is substantially parallel to the conveyance direction for conveying the recording medium, the chassis includes a guide portion that guides the tray in the conveyance direction, and the guide portion includes A protrusion having a circumferential surface portion that is formed in a circumferential surface having a direction intersecting a plane of the conveyance locus as an axis and that is in sliding contact with a side edge of the sliding portion in the conveyance direction is provided. That.

It is a perspective view which shows the state which pulled out the tray from the chassis in the conventional disk drive. FIG. 2 is a cross-sectional view showing a II-II cross section of FIG. 1. It is a perspective view which shows the projection part of the conventional disk drive. 1 is an exploded perspective view showing a configuration of a disk drive according to a first embodiment of the present invention. It is a perspective view which shows the projection part in said 1st embodiment. It is a fragmentary sectional view which shows the contact state of a projection part and a sliding part in said 1st embodiment. FIG. 6B is a sectional view showing a VIB-VIB section of FIG. 6A. It is sectional drawing which shows the contact state of a projection part and a sliding part in said 1st embodiment. It is a fragmentary sectional view which shows the contact state of the projection part and sliding part in 2nd embodiment of this invention. It is sectional drawing which shows the VIIIB-VIIIB cross section of FIG. 8A.

Explanation of symbols

DESCRIPTION OF SYMBOLS 15 ... Chassis 20 ... Main-body part as a disk processing part 50 ... Tray 51 ... Sliding part 51A ... Side edge part 52 ... Mounting surface 100 ... Disk drive as a disk apparatus 151 ... Guide part 152 ... Projection part 152C ... Spherical part 152D ... circumferential surface 153 ... front projection 200 ... optical disc as recording medium

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In the first embodiment, a disk drive is described as an example of a disk device that records and reads information on and from an optical disk that is a detachable disk-shaped recording medium as a recording medium. However, only information reading or recording may be performed. Further, the disk-shaped recording medium is not limited to the optical disk, and any disk-shaped recording medium such as a magnetic disk or a magneto-optical disk can be targeted. Furthermore, for example, a single unit such as a game machine or a playback apparatus that performs processing for recording and playback such as video data recording may be used. Examples of the recording medium include CD (Compact Disc), DVD (Digital Versatile Disc), BD (Blu-ray Disc), HD-DVD (High Definition DVD), and the like.

[Disk drive configuration]
FIG. 4 is an exploded perspective view showing the configuration of the disk drive of the first embodiment. FIG. 5 is a perspective view showing a protrusion. FIG. 6A is a partial cross-sectional view showing a contact state between the protrusion and the sliding portion. 6B is a cross-sectional view showing a VIB-VIB cross section of FIG. 6A. FIG. 7 is a cross-sectional view showing a contact state between the protruding portion and the sliding portion.
Hereinafter, the lower left side in FIG. 4 will be described as the front side. In the following, when the positional relationship of each component is indicated by a direction, the direction viewed from the front surface of the disk drive 100 is used.

In FIG. 4, 100 is a disk drive. The disk drive 100 has a metal case body 10. The case body 10 includes an upper case 11 having a lower surface and a front surface that open over two surfaces, a lower case 12 that closes the lower surface of the upper case 11, and a decorative plate 13 that closes the front surface of the upper case 11. is doing. In addition, the decorative plate 13 is formed with an opening 13A. Further, the decorative board 13 is provided with a switch operation unit 13B.

The case body 10 includes a chassis 15 made of synthetic resin. The chassis 15 forms a case body 10 with the upper case 11, the lower case 12 and the decorative plate 13. Moreover, these structures define the accommodation space 18 inside.

The chassis 15 is formed in a substantially rectangular frame shape as shown in FIG.
The chassis 15 includes a guide portion 151 that guides a later-described tray 50 in the transport direction of the optical disc 200 on the front inner side of the both side surface portions 15A.
The guide 151 has a protrusion 152 and a front protrusion 153 provided on the front side of the protrusion 152.

The chassis 15 is provided with a main body 20 as a disk processing unit.
The main body 20 has a pedestal 21 formed in, for example, a metal flat frame shape. The pedestal portion 21 is attached to the chassis 15 by screwing the other edge so that one edge is rotatable in the vertical direction. On one edge of the pedestal portion 21, a rotation guide portion 22 that guides rotation about the other edge of the pedestal portion 21 is integrally attached.

Further, the pedestal portion 21 is provided with a disk rotation driving means 25 for rotating the optical disk 200 located on one rotating side. The disk rotation driving means 25 has a turntable 27. The turntable 27 is inserted into a shaft hole 210 formed in the center of the optical disc 200. A magnet (not shown) is embedded at the tip of the turntable 27.

The pedestal 21 is provided with a processing moving means 30 for moving the recording / reproducing means 40 in the radial direction of the optical disc 200.
The processing moving means 30 includes a pair of guide shafts 31 and a moving electric motor 32.
The recording / reproducing means 40 has a movement holding portion 41 held in a state of being bridged by the pair of guide shafts 31. In addition, the movement holding unit 41 of the recording / reproducing means 40 is provided with a pickup 42 for performing reading processing for reading various information recorded on the recording surface of the optical disc 200 and recording processing for recording various information on the recording surface. ing.

In addition, a tray 50 having a placement surface 52 on which the optical disc 200 is placed is disposed in the chassis 15.
As shown in FIG. 4, the tray 50 is formed in a substantially rectangular plate shape, for example, with synthetic resin. A longitudinal plate-like window closing plate portion 53 that is formed of the same material as the decorative plate 13 and closes the window portion 13A of the decorative plate 13 of the case body 10 is attached to and detached from the front edge of the tray 50 in the longitudinal direction. It is attached as possible.
Furthermore, the sliding part 51 which protrudes in plate shape toward a side from a lower end edge is provided in the both-sides edge of the longitudinal direction of the tray 50, respectively.
A latch (not shown) is provided on the lower surface of the tray 50 along the longitudinal direction of the tray 50.

Further, as shown in FIG. 4, an opening / closing driving means 60 for moving the tray 50 forward and backward is disposed on the front inner left side of the lower surface of the chassis 15.
The opening / closing driving means 60 includes a drive transmission unit 61 including a gear 62, a pulley, an endless belt, and the like, and an electric motor 64 for entering and exiting. Then, the opening / closing driving means 60 rotates the gear 62 as a pinion engaged with the latch of the tray 50 by driving the electric motor 64 for entering / exiting. Thereby, the tray 50 is advanced and retracted from the window portion 13A of the decorative plate 13.
That is, the tray 50 transports the optical disc 200 between a processing position where the recording / reproducing means 40 can process the optical disc 200 and an outer position where the optical disc 200 is located outside the chassis 15.

Further, the opening / closing drive means 60 has a moving cam 68 disposed so as to be movable along the front surface of the chassis 15.
Then, the moving cam 68 moves along the width direction of the chassis 15 by driving the electric motor 64 for entry / exit and the drive transmission unit 61 to rotate the pedestal portion 21 in the vertical direction.

The main body 20 is constituted by the disk rotation driving means 25, the processing moving means 30, the recording / reproducing means 40, and the opening / closing driving means 60 described above.

The chassis 15 is provided with a rotor support member 17.
A support hole 17 B is formed in the rotor support member 17. A substantially disk-shaped rotor 29 is rotatably mounted in the support hole 17B. A magnetic material (not shown) is integrally attached to the rotor 29. The rotor 29 holds the optical disc 200 between the turntable 27 and the magnetic force of the magnet of the turntable 27.

A circuit board 70 is attached to the chassis 15.
The circuit board 70 is attached so as to cover the main body portion 20 by closing the lower surface of the chassis 15. A control unit 71 is mounted on the circuit board 70.

The control unit 71 controls the operation of the main unit 20 such as the tray 50 entry / exit control and the information recording process on the optical disc 200.

Such a disk drive 100 according to the present embodiment is greatly different from the conventional disk drive 100 in the shapes of the protrusion 152 and the sliding portion 51 and in the contact state thereof.
Hereinafter, the contact state between the protrusion 152 and the sliding portion 51 will be described with reference to FIGS. 5 to 6B.

As shown in FIG. 5, the protrusion 152 according to the present embodiment includes a main body 152A and two reinforcing portions 152B coupled to the upper surface of the main body 152A.
The reinforcing portion 152B has a wedge shape with a right-angled triangle when viewed from the front, and the short side forming the right-angled portion of the right-angled triangle is coupled to the side surface portion 15A of the chassis 15. Further, the long side is coupled to the upper surface of the main body 152A.
One of the two reinforcing portions 152B is formed flush with the front surface of the main body portion 152A. The other is formed flush with the back surface of the main body 152A.
The main body portion 152A is a substantially rectangular parallelepiped member having one side surface coupled to the side surface portion 15A of the chassis 15. A portion extending from the other side surface to the lower surface of the main body portion 152A is a spherical spherical portion 152C.
The protrusion 152 is integrally formed with the chassis 15.

On the other hand, as shown in FIG. 6A, the sliding portion 51 of the present embodiment has a circumferential edge 51 A having an axis in the direction parallel to the conveying direction on the outer upper side.
6A and 6B, the protrusion 152 and the sliding portion 51 are in point contact at one point between the spherical portion 152C and the side edge portion 51A.
In addition, although the projection part 152 and the sliding part 51 of the one end side were demonstrated here, as shown in FIG. 7, the projection part 152 and the sliding part 51 of the other end side are also formed in the same shape, Point contact is made at one point between the spherical surface portion 152C and the side edge portion 51A.

[Disk Drive Operation]
Next, the operation of the disk drive 100 in the above embodiment will be described. Here, the conveyance of the optical disc 200 will be described, and the description of the operation of the main body 20 and the like will be omitted.

In order to perform the process on the optical disc 200, first, the switch operation unit 13 B is operated, the tray 50 is advanced and retracted by the operation of the opening / closing drive means 60, and is pulled out from the chassis 15.
Subsequently, the optical disc 200 is placed on the placement surface 52 of the drawn tray. At this time, the optical disc 200 is located at the outer position.
The switch operation unit 13B is operated again, the tray 50 is moved forward and backward, and the optical disc 200 is conveyed to the processing position in the case body 10.

[Effects of disk drive]
According to the above disk drive 100, the following effects can be expected.

(1) The protrusion 152 abuts on the sliding portion 51 in the spherical portion 152C formed in a spherical shape. That is, the protrusion 152 and the sliding portion 51 are in point contact.
For this reason, in the disk drive 100 of the present embodiment, the protrusion 152 and the sliding part 51 are in surface or line contact or point contact, and the contact at the time of conveyance is compared with the conventional disk drive 100 in which the contact area has fluctuated. The area does not fluctuate, the fluctuation of friction is also suppressed, and it can be smoothly conveyed.
For this reason, flapping of the tray 50 at the time of conveyance, generation | occurrence | production of a vibration, noise, etc. can be prevented.

Further, even if the side surface portion 15A is inclined due to a molding error or the like and the projection portion 152 is displaced with respect to the tray 50, the contact portion of the projection portion 152 with the sliding portion 51 is the spherical portion 152C. Always in point contact.
For this reason, the contact area does not differ between products, and generation | occurrence | production of a vibration, noise, etc. can be suppressed in all the products. In addition, vibrations and noises can be prevented regardless of the displacement of the protrusion 152, so that a molding error of the protrusion 152 can be allowed. Thereby, the yield at the time of manufacture of the tray 50 can be improved.

(2) The sliding part 51 is provided on both side edges of the tray 50 in the transport direction. Two guide portions 151 are provided corresponding to the two sliding portions 51.
For this reason, the tray 50 to be transported can be firmly guided in the transport direction.

In addition, the guide portion 151 includes a protrusion 152 and a front protrusion 153 that is provided closer to the outer position than the protrusion 152 and contacts the sliding portion 51.
In such a configuration, when the tray 50 is pulled out from the chassis 15, the load of the tray 50 is concentrated on the protrusion 152. In particular, when the window closing plate portion 53 is formed of a metal such as aluminum, the concentrated load is large. When the load applied to the protrusion 152 is large, a stick-slip phenomenon is likely to occur due to an increase in frictional force.

(3) Each of the two protrusions 152 comes into contact with the side edge portion 51 A provided on both side edges of the tray 50. As a result, a force indicated by an arrow F in FIG. That is, the tray 50 is always subjected to a force from the side edge toward the inside.
For this reason, in the disk drive 100 of the present embodiment, the horizontal displacement of the tray 50 can be prevented.
Here, as shown in FIG. 4, in the configuration in which the opening / closing drive means 60 is disposed at a position biased to either the left or right side of the tray 50, rattling of the tray 50 in the left-right direction occurs. Cheap.
On the other hand, in the disk drive 100 according to the present embodiment, since the horizontal displacement of the tray 50 can be prevented, not only the vertical flapping but also the horizontal wobbling can be suppressed.

(4) When the chassis 15 is made of synthetic resin and the protrusions 152 are formed integrally with the chassis 15, the position of the protrusions 152 with respect to the tray 50 is displaced due to molding errors and the contact area is likely to change. .
On the other hand, in the disk drive 100 of the present embodiment, the contact portion of the projection 152 with the sliding portion 51 is the spherical portion 152C, so that both are always in point contact.
For this reason, even when the chassis 15 and the projecting portion 152 are integrally formed of synthetic resin, the contact area does not differ between products, and the occurrence of vibrations and noises can be suppressed in all products.

[Second Embodiment]
Next, a disk drive according to the second embodiment of the present invention will be described.
The disk drive of the second embodiment has substantially the same configuration as the disk drive 100 of the first embodiment, and only the configuration of the protrusion 152 is different. Therefore, the other configuration is omitted, and the protrusion 152 will be described.
FIG. 8A is a partial cross-sectional view showing a contact state between the protruding portion and the sliding portion in the second embodiment. FIG. 8B is a cross-sectional view showing the XIIIB-XIIIB cross section of FIG. 8B.

As shown in FIGS. 8A and 8B, the protrusion 152 of the present embodiment has a circumferential surface 152D instead of the spherical surface 152C.
The circumferential surface portion 152D is provided in a portion extending from one side surface to the lower surface of the main body portion 152A.
Further, the circumferential surface portion 152 D has a circumferential surface-shaped outer shape whose axis is a direction A that intersects the plane of the transport locus of the tray 50.
In other words, the protrusion 152 protrudes in a truncated shape.
Since the direction A is not parallel to the planes (the upper surface 51B and the side surface 51C) constituting the sliding part 51, the protrusion 152 is located at one point between the circumferential surface part 152D and the side edge part 51A. It is in sliding contact.

Also in this embodiment, since the projection part 152 and the sliding part 51 are point-contacted, the effect similar to the above-mentioned 1st embodiment can be acquired.
For example, there are the following effects.

(5) Since the protruding portion protrudes in a truncated shape, even if the side surface portion 15A is inclined due to a molding error or the like and the protruding portion 152 is displaced with respect to the tray 50, the protruding portion 152 and the sliding portion The point contact state with 51 is maintained. Moreover, it is hard to interfere with surrounding members.

[Modification of Embodiment]
In addition, this invention is not limited to embodiment mentioned above, The deformation | transformation shown below is included in the range which can achieve the objective of this invention.

That is, in each of the above-described embodiments, the disk drive 100 including the two sliding portions 51 and the two projecting portions 152 is illustrated, but the present invention is not limited thereto.
For example, the sliding part 51 and the projecting part 152 may be provided one by one, or three or more.
Moreover, the sliding part 51 and the protrusion part 152 do not need to be the same number. For example, a plurality of protrusions 152 may be in contact with one sliding portion.
When the number of the protrusions 152 increases, the tray 50 is guided at a plurality of places, so that the transport of the tray 50 can be further stabilized.
However, since the contact area and the frictional force increase, the number of the protrusions 152 has an upper limit. On the other hand, since the protrusion 152 of the present invention makes point contact with the sliding portion 51, the contact area does not increase as much as the conventional case even if the number thereof is increased. For this reason, the selection range of the number of the protrusions 152 can be widened.

Moreover, in each above-mentioned embodiment, although the side edge part formed in the circumferential surface shape was illustrated, it is not limited to this.
For example, the side edge may be formed as an acute or obtuse end.
Furthermore, in the above-described first embodiment, the configuration in which the spherical surface portion 152C and the side edge portion 51A are in contact with each other is illustrated, but the present invention is not limited to this.
For example, the spherical portion 152 C may be configured to contact the upper surface or side surface of the sliding portion 51.
Even in these cases, since the sliding portion 51 and the protruding portion 152 are still in point contact, the same effects as those of the above-described embodiment can be obtained.

In each of the above-described embodiments, the synthetic resin chassis 15 is illustrated, but the present invention is not limited thereto. For example, the chassis 15 may be formed of metal or the like.
Further, the protrusion 152 is not limited to one integrally formed with the chassis 15. For example, a separate protrusion 152 may be provided on the chassis 15 by bonding or the like.
Furthermore, the protrusion 152 is not limited to a truncated shape, and may be a cone shape or a column shape.
Further, in each of the above-described embodiments, the protrusions 152 that are perpendicular to the transport direction of the tray 50 in the plan view from above are illustrated, but the protrusions 152 are provided obliquely with respect to the transport direction. It may be done.
Even in these cases, since the sliding portion 51 and the protruding portion 152 are still in point contact, the same effects as those of the above-described embodiment can be obtained.

In addition, the specific structure and procedure for carrying out the present invention can be appropriately changed to other structures and the like within a range in which the object of the present invention can be achieved.

[Effect of the embodiment]
The projecting portion 152 abuts on the sliding portion 51 at a spherical portion 152C formed into a spherical shape. That is, the protrusion 152 and the sliding portion 51 are in point contact.
For this reason, the fluctuation of the contact area is small, and the fluctuation of friction is also small.
Further, since the difference between the static friction coefficient and the dynamic friction coefficient is also reduced by reducing the frictional force, the stick-slip phenomenon is less likely to occur.
For this reason, flapping of the tray 50 at the time of conveyance, generation | occurrence | production of a vibration, noise, etc. can be prevented.
Further, even if the side surface portion 15A is inclined due to a molding error or the like and the projection portion 152 is displaced with respect to the tray 50, the contact portion of the projection portion 152 with the sliding portion 51 is the spherical portion 152C. Always in point contact.
For this reason, the contact area does not differ between products, and generation | occurrence | production of a vibration, noise, etc. can be suppressed in all the products.

The present invention can be used as a disk device.

Claims

The chassis,
A disk processing unit provided in the chassis for processing a disk-shaped recording medium;
A tray having a mounting surface on which the recording medium is mounted;
The tray is a disk device that conveys the recording medium between a processing position where the disk processing unit can process the recording medium and an outer position where the recording medium is located outside the chassis,
The tray includes a longitudinal sliding portion that is substantially parallel to a conveyance direction for conveying the recording medium,
The chassis includes a guide portion that guides the tray in the transport direction,
The disk device according to claim 1, wherein the guide portion includes a projection portion having a spherical surface formed in a spherical shape and in sliding contact with the sliding portion.
The chassis,
A disk processing unit provided in the chassis for processing a disk-shaped recording medium;
A tray having a mounting surface on which the recording medium is mounted;
The tray is a disk device that conveys the recording medium between a processing position where the disk processing unit can process the recording medium and an outer position where the recording medium is located outside the chassis,
The tray includes a longitudinal sliding portion that is substantially parallel to a conveyance direction for conveying the recording medium,
The chassis includes a guide portion that guides the tray in the transport direction,
The guide portion is a protrusion having a circumferential surface portion that is formed in a circumferential surface having an axis that intersects the plane of the transport locus of the tray as an axis and is in sliding contact with a side edge of the sliding portion in the transport direction. A disk device characterized by comprising:
The disk device according to claim 2,
The disk device according to claim 1, wherein the protruding portion protrudes in a truncated shape.
4. The disk device according to claim 1, wherein:
The sliding portion is
It has a circumferential side edge on the side edge in the transport direction,
The disk device according to claim 1, wherein the side edge portion abuts on the protrusion.
The disk device according to any one of claims 1 to 4, wherein:
The sliding portion is provided on both side edges of the tray in the transport direction,
Two of the guide portions are provided corresponding to the two sliding portions,
Each of the two guide portions is
The protrusion,
A disk device comprising a front projection provided closer to the outer position than the projection and contacting the sliding portion.
The disk apparatus according to any one of claims 1 to 5,
The disc device according to claim 1, wherein the protrusion is formed integrally with the chassis.