JP2010152944A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk drive including a turntable device capable of simultaneously improving ejection performance of dually inserted disks and centering performance of the disks. <P>SOLUTION: In the disk drive 1, a turntable 7 for fixing a disk 4 to rotate it includes an upper turntable 12 made of an elastic material and a lower turntable 13 having a disk fixing surface 18 for fixing the disk. The upper turntable 12 biases the fixed disk upward. Even when two disks are stacked and inserted into the disk drive by mistake, during an ejection operation, the upper turntable 12 pushes up the two disks removed from a clamp 8 by biasing force. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a turntable used in a disk apparatus that uses a disk such as an optical disk as a recording medium and performs recording on the disk and / or reproduction of the disk, and a disk apparatus using the turntable, and in particular, an insertion of the disk apparatus. The present invention relates to a disk device that improves the removal performance.

As a conventional disk device, in order to perform accurate centering of the disk and suppress the influence of vibration and impact applied from the outside, a fitting member into which the center hole of the disk is fitted, and a table part that supports the disk, And a magnet for attracting the metal plate attached to the disk, and a plurality of notches formed in the fitting member, and a plurality of springs arranged so as to be able to project and retract in the radial direction with respect to the fitting member. In a disc table having centering means for pressing the inner wall portion of the center hole of the disc to align the center of the disc with the center of the fitting member, the spring constant of the spring portion can Is set to be pressed (see, for example, Patent Document 1).
JP 2002-203352 A

  However, in the conventional disk device, when two discs are overlapped due to a user's malfunction and inserted into the disc device, the two lower stacked discs are pressed down by the upper disc and turned. There was a problem that the disk could not be ejected due to being caught by the center cap of the table.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide a disk device that can be surely ejected when the disk is inserted twice.

  The disc device of the present invention is a disc device having a turntable for placing and rotating the disc, wherein the turntable has an upper turntable portion made of an elastic body and a stationary surface on which the disc is placed. The upper turntable includes a turntable portion, and has a configuration that urges a disk placed on the lower turntable portion upward.

  Here, the upward direction is a direction perpendicular to the disk surface placed on the turntable and going in the opposite direction from the disk stationary surface.

  With this configuration, even if two discs are stacked and inserted in the disc device by mistake, the upper turntable unit pushes the two discs upward by urging force when performing the ejecting operation. The disc can be reliably ejected.

  In the disk device of the present invention, the upper turntable portion is constituted by a leaf spring having spring properties.

  Further, in the disc device of the present invention, the upper turntable portion has a bent portion obtained by bending a part of the leaf spring, and the bent portion contacts the disc and biases the disc upward. Have.

  Furthermore, the disk device of the present invention has a configuration in which the tip of the upper turntable portion contacts the lower turntable portion, and the space between the tip of the upper turntable and the bent portion is bent in the vertical direction. ing.

  With this configuration, when the disc is inserted, the leaf spring portion softly receives the disc, so that the operation noise during the disc clamping operation is reduced.

  Furthermore, the disk device of the present invention has a configuration in which the disk and the folding part are in point contact at a plurality of positions of the folding part.

  With this configuration, a more stable clamping operation can be realized when the disk is clamped. In addition, when performing the disc ejection operation, the disc can be lifted upward at a plurality of fulcrums.

  The disk device of the present invention has a configuration in which the bent portion is inscribed in the center hole of the disk.

  With this configuration, the disk is moved toward the center of the disk by the biasing part, and the disk centering function is improved.

  Further, in the disk device of the present invention, the turntable portion has a stopper for fixing the upper turntable portion and the lower turntable portion.

  With this configuration, the biasing component and the resin component can be reliably combined, and a stable rotation operation can be performed when the disk device rotates the disk placed on the turntable.

  According to the present invention, the turntable portion is composed of a plurality of parts, and one of the plurality of parts is configured to urge the disk placed on the turntable portion upward, so that the disk is erroneously inserted into the disk device. Even if two discs are stacked and inserted, a disc device having an effect that the two discs can be reliably ejected by being pushed upward by the urging force of the two discs can be provided. Is.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an external view of a disk device according to an embodiment of the present invention. In the following description, the X-axis direction of FIG. 1 will be described as the horizontal direction, the Y-axis direction will be described as the depth direction, and the Z-axis direction will be described as the height direction. Alternatively, “left” or “right” is used for the X-axis direction, “front” or “rear” is used for the Y-axis direction, and “upper” or “lower” is used for the Z-axis direction.

  In FIG. 1, a disk device 1 according to an embodiment of the present invention employs a slot-in type disk insertion method, and the disk device 1 is used for inserting a disk into the disk device 1 on the front surface thereof. The disc insertion slot 2 is provided.

FIG. 2 is a diagram showing a schematic configuration inside the disk device 1. In FIG. 2, the disk device 1 is provided with a housing 3 therein, and a rubber that allows the disk 4 to be transported between the disk insertion slot 2 and the disk playback position 5 inside the housing 3. It is clamped by a disc transport mechanism 6 composed of a roller 33 and gear parts (not shown), a disc clamp portion 8 for clamping the disc 4 transported to the disc reproduction position 5 on the turntable 7, and a disc clamp portion 8. And a disk rotating section 9 for rotating the disk 4.

  FIG. 3 is a side view of the disk rotating unit 9 for rotating the disk 4 in the embodiment of the present invention. The disk rotating unit 9 includes a spindle motor 10 for rotating the disk 4, a turntable unit 7 for fixing the disk 4, and a motor rotating shaft 37 for press-fitting and rotating the turntable unit 7. Yes. In FIG. 3, the upward direction is the direction indicated by the arrow 34. Further, the downward direction is the direction indicated by the arrow 35.

  In a normal use state, that is, in a state where the user inserts the disk 4 and reproduces the disk 4 with the disk device 1, the disk 4 is inserted from the disk insertion port 2 of the housing 3 and is moved by the disk transport mechanism 6. It is transported into the housing 3 and reaches a disk reproduction position 5 where the disk 4 is reproduced. The disk 4 transported to the disk playback position 5 by the disk transport mechanism 6 is placed on the turntable unit 7, and then the disk clamp unit 8 moves in the direction indicated by the arrow 35 below, and the turntable unit 7. Is clamped by being sandwiched between the disc clamp portion 8 and the disc clamp portion 8. Then, when the spindle motor 10 as a drive source rotates, the disk rotating portion 9 rotates, and the clamped disk 4 rotates accordingly. Further, after that, the disk device 1 drives the optical pickup unit 11 including a light source such as a laser diode, an objective lens, and an actuator for operating the objective lens, and records information recorded on the recording surface of the rotating disk 4. Read and play.

  Next, the details of the turntable in the present embodiment will be described with reference to FIGS.

  FIG. 4 is a diagram showing the structure of the turntable unit 7 in the present embodiment. FIG. 5 is a diagram showing the structure of the lower turntable in the embodiment of the present invention. FIG. 6 is a view showing the structure of the upper turntable in the embodiment of the present invention. FIG. 7 is a cross-sectional view taken along a straight line passing through the center hole of the turntable and parallel to the longitudinal direction of the upper turntable portion.

  The turntable unit 7 is configured such that the lower turntable unit 12 and the upper turntable unit 13 can be separated.

  The lower turntable portion 13 has a center hole 14 that is press-fitted into the motor rotation shaft 37 of the spindle motor 10 at the center portion thereof, and the turntable portion 7 extends from above the lower turntable portion 13 and the turntable portion 7. A center cap inclined portion 39 having a predetermined gradient for combining the disc clamp portion 8 for holding the fixed disc 4 against the turntable 7 portion is provided. In other words, even if the fitting position of the clamper 8 and the turntable portion 7 is slightly deviated from the normal position due to variations in the outer diameter of the disc or variations in the right and left of the disc insertion position, the center cap is moved together with the lowering operation of the clamper 8. The inclined portion 39 guides the clamper 8 to a proper position, and the clamper 8 and the turntable portion 7 are finally accurately fitted.

  Further, the lower turntable portion 13 is formed on the outer peripheral side with a circular shape having a diameter equal to the diameter of the center hole 26 of the disk 4, and further, the base plate 21 of the upper turntable portion 12 is accommodated on the inner peripheral side. A center cap 15 and a center cap 16 having a circular base plate storage space 36 are provided.

  Further, the lower turntable portion 13 is for mounting the disk 4 around the upper turntable mounting space 17a and the upper turntable mounting space 17b, which are mounting spaces for the upper turntable portion 12 and the lower turntable portion 13. The disc mounting surface 18 is provided.

  The upper turntable portion 12 and the lower turntable portion are combined, and the stopper 22 and the stopper 23 of the upper turntable portion 12 and the stopper storage hole 19 and the stopper storage hole 20 for fixing the lower turntable portion 13 are provided. It has become.

  As shown in FIG. 6, the upper turntable portion 12 includes a circular base plate 21 equivalent to the circular base plate storage space 36 formed on the inner peripheral side of the center cap 15 and the center cap 16, and the upper turntable portion 12. A stopper 22 and a stopper 23 for fixing the stopper accommodation hole 19 and the stopper accommodation hole 20 of the lower turntable portion 13 are provided.

  Further, a guide plate 24 and a guide plate 25 for supporting the disc 4 when clamping the disc 4 are provided. Between the guide plate 24 and the guide plate 25, each of the guide plate 24 and the guide plate 25 is provided. Are provided with a guide plate folding part 28 and a guide plate folding part 27. The guide plate folding portion 28 and the guide plate folding portion 27 are dimensionally considered so as to be positioned inside the center hole when the disk 4 is clamped. This is done by inclining the plate 25.

  Further, the upper turntable portion 12 has a guide plate tip 29 and a guide plate tip 30 which are tip portions of the upper turntable portion 12.

  Each of the guide plate 24 and the guide plate 25 is arranged on a straight line with the base plate 21 interposed therebetween. The guide plate 24 is inclined from the top to the bottom toward the guide plate tip 29 from the guide plate folding part 28, and the guide plate tip 29 is in contact with the lower turntable part 13. The guide plate 24 positioned between the portion 28 and the plate tip 29 can be bent in the vertical direction. Similarly, the guide plate 25 has a structure inclined from the top to the bottom from the guide plate folding part 27 toward the guide plate tip 30, and the guide plate tip 30 is in contact with the lower turntable part 13. Yes. That is, when viewed from the side, the upper turntable portion 12 has a mountain shape with the guide plate folding portion 27 and the guide plate folding portion 28 as apexes.

  The turntable unit 7 is configured by placing an upper turntable unit 12 on a lower turntable unit 13. That is, the base plate 21 is stored in the base plate storage space 36, the guide plate 25 is stored in the upper turntable mounting space 17a, and the guide plate 24 is stored in the upper turntable mounting space 17b. Here, the upper turntable portion 12 is fixed to the lower turntable portion 13 by inserting the stoppers 22 and 23 into the recesses provided in the lower portions of the center caps 15 and 16, respectively. Therefore, if the lower turntable part 13 press-fitted into the motor rotating shaft 37 rotates, the upper turntable part 12 also rotates together with this.

  In addition, as described above, the turntable portion 7 is configured to be separable into two parts at the top and bottom, so that, for example, even when the spring property of the upper turntable portion 12 is deteriorated, the entire turntable portion 7 is replaced. This eliminates the need to do this and improves the maintenance performance, so that the part replacement cost can be reduced.

The operation of the disk device 1 configured as described above will be described.
When the disc 4 is inserted into the disc apparatus 1 and the inserted disc 4 is conveyed to the disc reproduction position 5 and then the disc 4 is clamped on the turntable portion 7 by the disc clamp portion 8, the disc 4 is guided. The disk 4 is supported by using the plate folding part 27 and the guide plate folding part 28 as a fulcrum, and the force that the disk 4 receives in the downward direction from the disk clamp part 8 to the turntable part 7 (direction indicated by the arrow 35) is buffered. The upper turntable portion 12 can buffer the impact when the disk 4 is clamped.

  Here, when the disk 4 is clamped by using the conventional turntable 41, a minute gap is generated between the center hole 26 and the center cap 42, and the eccentricity of the disk 4 with respect to the motor rotation shaft increases. As a result, the centering accuracy of the disk 4 may deteriorate. Further, if a minute gap is generated between the center hole 26 and the center cap, a track jump as a malfunction occurs during the recording or reproducing operation of the disk device, and writing or reading of the information signal to the disk 4 is interrupted. It will cause. In addition, since the turntable 41 is made of a resin part, when the disk 4 is clamped, a sound (clamping sound) due to contact between the resin part and the disk 4 is generated.

  In contrast, in the disk device 1 of the present embodiment, the center hole 26 of the disk 4 contacts the guide plate folding part 27 and the guide plate folding part 28 of the upper turntable 12 so that the center of the disk 4 is the center hole. Centering performance can be improved by applying a force to the center hole 26 so as to go to the center of the center 14. FIG. 8 is a diagram for explaining the operation of improving the centering performance in the embodiment of the present invention. The operation will be described with reference to FIG. The guide plate folding part 27 and the guide plate folding part 28 enter the inside of the center hole 26 during the clamping operation, and then the disk 4 is guided by the inclination of the guide plate 24 and the guide plate 25 to be centered. That is, when the center hole 26 is in a positional relationship closer to the guide plate folding part 28 than to the guide plate folding part 27, the center hole 26 comes into contact with the guide plate folding part 28 first, and the disc is guided to the outer end side of the guide plate 24. . The centering operation is completed when the center hole 26 comes into contact with the guide plate folding part 27 during the operation. In the opposite case, centering is performed in the same manner.

  Next, the operation sound when the disk 4 is clamped will be described as follows.

  In the case of using the conventional one, there is no member to be supported from the lower side when the disc is placed, and therefore it is not possible to reduce the collision sound when the disc freely falls and collides with the center cap.

  In contrast, in the present embodiment, when the disk 4 is clamped, the disk 4 that is lowered by the clamping operation is positioned above the disk placement position 38 (in the direction indicated by the arrow 34) and the guide plate 24. 25 is contacted. Thereafter, the disk 4 is pushed downward (in the direction indicated by the arrow 35) by the disk clamp 8 and moved upward (in the direction indicated by the arrow 34) from the guide plate 24 and the guide plate 25 while moving to the disk mounting position 38. Since it moves by receiving the pushing back force, it is possible to greatly reduce the collision sound when being stored in the disk mounting position 38.

  Further, the case where two discs are mistakenly overlapped and inserted into the disc device 1 will be described below with reference to FIG.

  As shown in FIG. 9, when the disc clamp portion 8 releases the force that pushes the turntable portion 7 downward (in the direction indicated by the arrow 35), the disc clamp state is released, and the disc 4 is ejected, the spring property The upper turntable 12 having the function performs the operation of lifting the disk 4 upward (in the direction indicated by the arrow 34). The upper turntable 12 having a spring property prevents the center hole 26, the center cap 15 and the center cap 16 from being caught during the ejection operation by lifting the disk 4 upward (in the direction indicated by the arrow 34). As a result, the disc 4 is smoothly ejected without being caught during the disc ejection operation (operation of transporting the disc 4 toward the disc ejection port 2 by the rubber roller 33).

  Here, when the disc is ejected when the two discs 31 and 32 are inserted using the conventional turntable as shown in FIG. 9A, the disc clamp portion is clamped. Is released and moved in the direction indicated by the arrow 34, the disc ejection mechanism 6 rotates the rubber roller 33 in the direction of the disc insertion slot 2 by a motor (not shown) to eject the disc 32. For 32, the center cap of the turntable may get stuck in the center hall and cannot be discharged.

  On the other hand, in the disk device 1 of the present embodiment, as shown in FIG. 9B, when two disks 31 and 32 are inserted, the upper turntable portion 12 is directed upward. The disk 31 and the disk 32 are lifted in the direction indicated by the arrow 34, and the disk 31 and the disk 32 can be lifted above the center cap 15 and the center cap 16, whereby two overlapping disks 31 and the disc 32 are transported in the direction of the disc insertion slot 2 by the disc discharge mechanism 6 having the rubber roller 33 without the center hole 26 being hooked on the center cap 15 and the center cap 16 of the lower turntable portion 13. The disc 31 and the disc 32 can be surely ejected. That. That is, it is possible to greatly improve the ejection performance of the disk 31 and the disk 32.

  In the above embodiment, the lower turntable portion 13 has two upper turntable attachment spaces 17 and 18 and the upper turntable portion 12 has two guide plate folding portions 27 and guide plates. Although the structure includes the folding portion 28 and the two guide plates 24 and 25, these may not necessarily be two. That is, the lower turntable portion 13 may have a structure having three or more upper turntable mounting spaces, and the upper turntable portion 12 may have three or more guide plates and guide plate folding portions. When the structure has three or more guide plates and a guide plate folding part, the structure is more complicated than the two cases, but the number of fulcrums for supporting the disk increases, so that the disk can be ejected. The fulcrum for lifting the disc is increased, and the discharging performance is further improved.

  Furthermore, when the structure has three or more guide plates and guide plate folding portions, the area for escaping the guide plate of the lower turntable increases and the area of the center cap 15 and the center cap 16 becomes small. Although it is difficult to secure the storage holes 19 and 20 and it is difficult to secure the width of the guide plate, the upper turntable portion 12 causes the disk 4 to be centered from multiple directions by increasing the number of guide plates more than two. Centering performance is improved because the accuracy of centering is increased.

  Further, the turntable section 7 as described above can be applied to various disk devices having other types and configurations besides the disk device as shown in the figure.

  As described above, the disk device according to the present invention has the effect of improving the disk ejection performance and the disk centering performance, and uses a disk such as an optical disk as a recording medium. The present invention is useful as a turntable used in a disk device for recording and / or reproducing a disk and a disk device using the turntable.

(A) Plan view of the disk device according to the embodiment of the present invention (b) Front view of the disk device according to the embodiment of the present invention FIG. 3 is an external view for explaining the operation of the disk device in the embodiment of the present invention The side view of the disk rotation part in embodiment of this invention The perspective view of the turntable in embodiment of this invention Lower turntable perspective view in an embodiment of the present invention Upper turntable perspective view in an embodiment of the present invention Turntable sectional view in an embodiment of the present invention The figure explaining the centering operation | movement in embodiment of this invention (A) The figure explaining the 2 sheet insertion / removal operation improvement operation | movement in embodiment of this invention (b) The figure explaining the 2 sheet insertion / removal operation improvement operation | movement in embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disc apparatus 2 Disc insertion port 3 Case 4 Disc 5 Disc reproduction | regeneration position 6 Disc conveyance mechanism 7 Turntable part 8 Disc clamp part 9 Disc rotation part 10 Spindle motor 11 Optical pick-up unit 12 Upper turntable part 13 Lower turntable part 14 Center hole 15 Center cap 16 Center cap 17a Upper turntable mounting space 17b Upper turntable mounting space 18 Disc mounting surface 19 Stopper storage hole 20 Stopper storage hole 21 Base plate 22 Stopper 23 Stopper 24 Guide plate 25 Guide plate 26 Center hole 27 Guide plate Folding part 28 Guide plate folding part 29 Guide plate tip 30 Guide plate tip 31 Disc 32 Disc 33 Rubber roller 34 Arrow 35 Arrow 36 Base plate storage space 37 Motor rotating shaft 38 Disc mounting position 39 Center cap inclined portion 40 Center cap inclined portion 41 Turntable 42 Center cap

Claims (7)

A disk device having a turntable for rotating the disk by placing the disk,
The turntable includes an upper turntable portion made of an elastic body and a lower turntable portion having a stationary surface on which the disc is placed, and the upper turntable moves the disc placed on the lower turntable portion upward. A disk device characterized by being biased.   2. The disk device according to claim 1, wherein the upper turntable portion is made of a leaf spring having a spring property.   3. The disc according to claim 2, wherein the upper turntable portion has a bent portion obtained by bending a part of the plate spring, and the bent portion contacts the disc and biases the disc upward. apparatus.   4. The disk device according to claim 3, wherein the disk and the folding part are in point contact at a plurality of locations of the folding part.   4. The disk device according to claim 3, wherein a tip of the upper turntable portion contacts the lower turntable portion, and a portion between the tip of the upper turntable and the bent portion is bent in a vertical direction.   4. The disk apparatus according to claim 3, wherein the bent portion is inscribed in a center hole of the disk.   The disk device according to claim 1, wherein the turntable portion includes a stopper that fixes the upper turntable portion and the lower turntable portion.