JP2008041179A - Changer type disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a changer type disk device in which when a drive unit is moved from a retract position to a drive position, the drive unit does not abut on a warped disk even when the housed disk is warped. <P>SOLUTION: In the device in which a plurality of stockers 8 which can hold a disk D are moved up and down by rotating synchronously a plurality of feed screw members 7, lead difference parts P in which each pitch width is different partially are set in the spiral groove 7a of a front side feed screw member 7a and a rear side feed screw member 7B which are displaced in the back and forth direction, contact between the warped disk D1 and the drive unit 4 is prevented by inclining forward the attitude of the stocker 8 shifted to this lead difference part P even when the disk D positioned at the lower part of the selected disk D is warped, and the drive unit 4 is surely moved to the drive position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a changer-type disk device capable of reproducing and / or recording information on a disk such as a CD or DVD, and having a plurality of stockers in the apparatus and storing a plurality of disks. is there.

  In an in-vehicle changer type disk device, a slot-in method in which a disk inserted into an apparatus through an insertion port is automatically conveyed to a predetermined position by a disk conveyance mechanism is often used. There are provided a drive unit that drives the disk to rotate and reproduces and / or records information by an optical pickup and the like, and a disk storage unit that can store a plurality of disks arranged in the thickness direction (vertical direction). The drive unit moves forward and backward between a drive position and a retracted position by a drive drive mechanism, and any one of a plurality of disks held in the disk storage portion is selectively pulled out at this drive position. The selected disk is rotationally driven by the drive unit.

  Conventionally, a plurality of stockers that can hold the outer peripheral edge of the disk over about a half circumference are arranged coaxially as a disk storage section provided in this type of changer type disk device, and each stocker has a spiral shape with an unequal pitch. A plurality of feed screw members having grooves are inserted and screwed together, and these stock screw members are synchronously rotated to transfer each stocker in the axial direction (for example, Patent Document 1). reference).

  FIG. 7 is a plan view showing the main part of a disk storage portion provided in such a conventional changer type disk device, FIG. 8 is a side view of a feed screw member provided in the disk storage portion, and FIG. 9 is a stocker by the feed screw member. It is explanatory drawing which shows the transfer operation | movement of. As shown in FIG. 7, the stocker 10 has an arcuate shape in plan view, and four insertion holes 10a are formed in total on the front end side and the rear end side, two on each of the left and right sides. A plurality of (for example, six) stockers 10 are stacked in the vertical direction, and four feed screw members 11 are inserted into the insertion holes 10a of the stockers 10, respectively. As shown in FIG. 8 and FIG. 9, spiral grooves 11 a with unequal pitches are formed on the outer peripheral surface of the feed screw member 11, and the four insertion holes 10 a of each stocker 10 correspond to the corresponding feed screw members 11. Screwed into the spiral groove 11a. In the spiral groove 11a, both the upper and lower end portions (both end portions in the longitudinal direction) are set to have a constant pitch width and a narrow pitch width, but the intermediate portion has a wide pitch width. Each of the feed screw members 11 has the same structure including the pitch width of the spiral groove 11 a, and these feed screw members 11 are rotatably supported by four shafts 13 erected on the chassis 12. Further, a gear 14 is fixed to the lower end of each feed screw member 11, and a large gear meshed with these four gears 14 is rotationally driven by a motor (none of which is shown), thereby providing four gears. The feed screw member 11 rotates in synchronization. As a result, the screwing position of the stocker 10 in the spiral groove 11 a varies with the synchronous rotation of each feed screw member 11, so that each stocker 10 holding the disk D moves up and down in the axial direction of the feed screw member 11. Can be made.

In a changer type disk device having such a disk storage portion, the disk D is inserted into the apparatus through the insertion slot, and one of the stockers 10 is made to face the same height as the transport path of the disk D. Since the outer peripheral edge portion of the disk D is inserted and held in this stocker 10, for example, six disks D can be held coaxially in each stocker 10 by repeating this operation. When one of the disks D is pulled out to the drive position (play position) or taken out of the apparatus, the feed screw members 11 are rotated synchronously to move the stocker 10 up and down in the axial direction. As shown in FIG. 9, the stocker 10 holding the selected disk D is transferred to an intermediate portion of the spiral groove 11a.
JP 2003-141809 A

  In the above-described conventional changer-type disk device, when a normal disk D with no warpage is used, the drive unit 15 is moved back and forth in the direction of the arrow X1-X2 by the drive drive mechanism as shown in FIG. By moving forward, each stocker 10 is moved up and down while the drive unit 15 is moved to the retracted position indicated by the solid line in the figure, or the drive unit 15 is moved to the drive position indicated by the broken line in the figure. The selected disk D can be pulled out from the stocker 10 or taken out of the apparatus. However, the disks D to be used are not necessarily all normal, and the disk D that has warped due to factors such as a high temperature environment may be used. In that case, the drive position of the drive unit 15 is reached. This causes a problem that the selected disk D cannot be driven or taken out of the apparatus. For example, when the first disk D is inserted into the apparatus and held in the lowermost stocker 10 and then changed to the second disk D, the drive unit 15 is moved from the drive position to the first disk D. After moving to the retracted position, it is moved downward, and then the drive unit 15 attempts to return to the drive position through the first disk D. At this time, if the first disk D is a warped disk D1 warped upward, as indicated by a two-dotted line in FIG. 10, the warped disk D1 is placed under the drive unit 15 moving in the direction of the arrow X2. Since the upper end of the periphery collides, and the drive unit 15 cannot be returned to the drive position indicated by the broken line, the second warped disk D cannot be driven or taken out of the apparatus.

  Such a problem occurs not only when the lowermost disk D warps upward, but also when the disk D positioned below the selected disk D warps upward. If the disk D held by the second-stage stocker 10 is warped upward, when the disk D held by the upper stocker 10 is driven, the disk D is moved to the lower part of the drive unit 15 to move to the drive position. The outer peripheral edge of the warped disc D will hit. Further, with respect to the disk D positioned above the selected disk D, when the disk D is warped downward toward the drive position, the drive unit 15 is moved from the retracted position to the drive position. The lower end of the outer periphery of the disk D warps against the clamper which is the upper member 15 and the selected disk D cannot be driven or taken out of the apparatus.

  The present invention has been made in view of the actual situation of the prior art, and an object of the present invention is to reliably move the drive unit to the drive position even if the stored disk is warped. An object of the present invention is to provide a changer-type disk device that can be used.

  According to the present invention, among the plurality of feed screw members that move the plurality of stacked stockers up and down, the pitch widths of the spiral grooves of the pair of feed screw members that are displaced in the moving direction of the drive unit are partially divided. Even if a disc adjacent to the selected disc is warped, it is driven with the warped disc by setting a different lead different portion and tilting the posture of the stocker transferred to this lead different portion. The contact with the unit was avoided.

  The changer-type disk device of the present invention includes a plurality of feed screw members that move up and down a plurality of stacked stackers, and a spiral groove of a pair of feed screw members that are displaced in the moving direction of the drive unit. The lead difference part with a partially different pitch width was set, and the lead difference part was used to incline the stocker's posture in the vicinity of the selected disk, so that the disk adjacent to the selected disk was warped. Even so, contact between the warped disk and the drive unit can be avoided, and the drive unit can be reliably moved to the drive position.

  The present invention is selected from among a plurality of feed screw members having spiral grooves, a plurality of stockers inserted through the feed screw members and engaged with the spiral grooves, and disks held by these stockers. A drive unit for reproducing and / or recording information on the disc, and a drive drive mechanism for moving the drive unit between a drive position for driving the selected disk and a retracted position for driving no disk. A changer disk device in which each stocker is moved in the vertical direction by synchronously rotating each feed screw member, and a pair of feeds that are displaced in the moving direction of the drive unit among the feed screw members. A lead difference portion in which the pitch width is partially different from each other is set in the spiral groove of the screw member, and the lead difference portion Posture of the feed has been said stocker is configured so as to be inclined with respect to the selected disc.

  In the changer type disk device configured as described above, when each stocker is moved up and down while being engaged with the spiral groove by synchronously rotating each feed screw member, the stocker is moved at the lead difference portion of the spiral groove. Therefore, even if the disk adjacent to the selected disk is warped, the contact between the warped disk and the drive unit is avoided, and the drive unit is securely moved to the drive position. Can be moved to.

  In the above configuration, when the drive unit is a type in which the selection disk is sandwiched between the turntable and the clamper, the lead difference portion is set at two positions sandwiching the intermediate portion of the spiral groove, and the selection disk is held. If the stocker located below the stocker assumes a forward leaning posture at one lead difference portion and the stocker located above the stocker holding the selected disk assumes a backward leaning posture at the other lead difference portion, the warp This is preferable because the contact between the disk and the drive unit can be avoided more reliably. However, when the height of the clamper is small or the drive unit is of a type that does not have a clamper, the lead differential part is set only below the middle part of the spiral groove, and the stocker moves forward at this lead differential part. You may make it become an inclination posture.

  The embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the internal mechanism of the changer-type disk device, FIG. 2 is a plan view of the main part of the disk storage part, and FIG. FIG. 4 is a side view showing the relationship between the drive unit in the retracted position and the disk storage portion, and FIG. 5 is a side view showing the relationship between the drive unit in the drive position and the disk storage portion.

  As shown in FIG. 1, the changer-type disk device according to this embodiment includes a box-shaped housing 1 and a nose member 2 disposed on the front surface of the housing 1. An insertion slot 2a for inserting / ejecting the disc D is opened. A disk transport mechanism 3 is disposed on the upper front side in the housing 1, and a drive unit 4 and a drive drive mechanism 5 are disposed below the disk transport mechanism 3. A disk storage unit 6 is disposed on the rear side of the housing 1, and the drive unit 4 is driven between a drive position near the disk storage unit 6 and a retracted position near the insertion port 2 a by the drive drive mechanism 5. It moves forward and backward in the direction of arrows X1-X2. The drive unit 4 includes a spindle motor 4b mounted on the support base 4a, a turntable 4c that is rotationally driven by the spindle motor 4b, a clamper 4d that sandwiches the center of the disk D between the turntable 4c, and the like. It is constituted by.

  As shown in FIGS. 2 and 3, four feed screw members 7 are disposed in the disk storage portion 6, and these feed screw members 7 are rotatably supported on a shaft hanging from an upper chassis (not shown). Has been. Each feed screw member 7 is disposed on the same circumference that is slightly larger than the diameter of the disk D. In the following description, two of the feed screw members 7 located on the front side (arrow X1 side) of the disk storage unit 6 are positioned on the front side. The feed screw member is denoted by reference numeral 7A, and the remaining two located on the back side (arrow X2 side) of the disk storage portion 6 are sometimes referred to as rear feed screw members and denoted by reference numeral 7B. Although not shown in the drawing, gears are fixed to the upper ends of the respective feed screw members 7, and the four feed screw members 7 are synchronized by rotating a large gear meshed with these gears by a motor. And is designed to rotate. Spiral grooves 7a with unequal pitches are formed on the outer peripheral surface of each feed screw member 7, and the spiral grooves 7a have upper and lower ends (longitudinal ends) at equal pitches and a narrow pitch width. However, the pitch width is set wide in the middle part. However, as is apparent from FIG. 3, the lead groove portion 7a of the front feed screw member 7A and the rear feed screw member 7B is provided with a lead difference portion P in which the pitch widths are partially different from each other. Except for this lead difference portion P, the spiral grooves 7a of the four feed screw members 7 (the front feed screw member 7A and the rear feed screw member 7B) are all set to the same pitch width. In the present embodiment, a lead difference portion P is set in a portion from the middle portion of the spiral groove 7a to the equal pitch portion on the lower end side. In the upper portion of the lead difference portion P, the front feed screw member 7A The pitch width of the spiral groove 7a is set larger than that of the spiral groove 7a of the rear feed screw member 7B, and the pitch width of the spiral groove 7a of the rear feed screw member 7B is set to the front side in the lower portion of the lead difference portion P. It is set larger than the spiral groove 7a of the feed screw member 7A. Specifically, as for the rear feed screw member 7B, the one in which the pitch width of the intermediate portion of the spiral groove 7a including the lead difference portion P is set to the same lead over the entire range is used as in the conventional case. Only the front feed screw member 7A is different from the rear feed screw member 7B only in the lead of the lead difference portion P.

  Each feed screw member 7 is inserted with a plurality of (six in this embodiment) insertion holes 8a of stockers 8, and these stockers 8 are viewed in plan so that the outer peripheral edge of the disk D can be held over about a half circumference. It has a bow shape. Each insertion hole 8a of the stocker 8 is provided with a protrusion (not shown) partially protruding on the inner peripheral surface thereof, and this protrusion is screwed into the spiral groove 7a of the corresponding feed screw member 7. is doing. As a result, when the four feed screw members 7 are synchronously rotated, each stocker 8 moves up and down in the axial direction of the feed screw member 7 while changing the screwing position with the spiral groove 7a. Here, since the spiral grooves 7a of the feed screw members 7 are all set to the same pitch width except for the lead difference portion P, the stocker 8 maintains the horizontal posture in the vertical direction while excluding the lead difference portion P. However, since the spiral grooves 7a of the front feed screw member 7A and the rear feed screw member 7B have different pitch widths at the lead difference portion P, the stocker 8 transferred to the lead difference portion P is rearward. It becomes a forward leaning posture in which the front end is lowered with respect to the end (see FIGS. 4 and 5).

  In the changer-type disk device thus configured, the disk D is inserted into the apparatus through the insertion port 2a of the nose member 2, and one of the stockers 8 is made to face the same height as the transport path of the disk D. As a result, the outer peripheral edge of the disk D is inserted and held in the stocker 8, and thus, by repeating this operation, for example, six disks D are stored in each stocker of the disk storage unit 6 as shown in FIG. 3. 8 can be held coaxially. When a desired one of the plurality of discs D held in each stocker 8, for example, the selected disc D held in the second-stage stocker 8 from the bottom is to be played, first, the drive unit 4 is moved to the retreat position farthest from the disk storage portion 6, and in this state, the four feed screw members 7 are synchronously rotated in one direction to transfer all the stockers 8 to the upper end side of the spiral groove 7a ( (See FIG. 3). Next, the feed screw members 7 are synchronously rotated in the reverse direction to sequentially lower the stocker 8, and as shown in FIG. 4, the lowermost stocker 8 is transferred to the lead difference portion P of the spiral groove 7a and The second-stage stocker 8 is transferred to the intermediate portion (selected position) of the spiral groove 7a. At this time, the second-stage stocker 8 from the bottom is maintained in a horizontal posture at a height position equivalent to the transport path of the disk D, but the lowermost stocker 8 transferred to the lead difference portion P is in a forward tilt posture. Therefore, even if the disk D held by the lowermost stocker 8 is the warped disk D1 warped upward, as shown by the two-dot chain line in FIG. It can be located below the lower end surface.

  Thereafter, as shown in FIG. 5, when the drive unit 4 is moved from the retracted position to the drive position by the drive drive mechanism 5, the drive unit 4 moves in the space between the selected disk D and the disk D below the arrow. Since it moves in the X2 direction, even if the disk D below the selected disk D is the warped disk D1, the drive unit 4 can be moved to the drive position without coming into contact with the outer edge of the warped disk D1. Then, the selected disk D held by the second-stage stocker 8 from the bottom is pulled out to the driving position by the disk transport mechanism 3, and the center of the selected disk D is sandwiched between the turntable 4c and the clamper 4d of the driving unit 4. Thereafter, in this state, the selected disk D is rotated by the spindle motor 4b, and an optical pickup (not shown) mounted on the drive unit 4 is moved in the radial direction of the selected disk D. Playback and / or recording can be performed. The same applies to the case where the selected disk D held in the other stocker 8 is operated to play. For example, when the selected disk D held in the third-stage stocker 8 is operated to play, When the screw member 7 is further rotated synchronously in the reverse direction, when the third-stage stocker 8 from the bottom is transferred to the middle portion of the spiral groove 7a, the lowermost stocker 8 is located on the lower end side of the spiral groove 7a, etc. While being transferred to the pitch portion to be in a horizontal posture, the second-stage stocker 8 from the bottom is transferred to the lead difference portion P to be in a forward inclined posture. Therefore, no matter which stocker 8 holds the warped disk D1, it is possible to prevent the drive unit 4 trying to move to the drive position from coming into contact with the warped disk D1.

  When the disk D held by the stocker 8 is taken out of the apparatus, the drive unit 4 is again moved to the retracted position shown in FIG. The disk D may be transported to a height position equivalent to the transport path of the disk D, and the disk D held in the stocker 8 may be pulled out by the disk transport mechanism 3 and transported outside the insertion slot 2a. Thereby, even if the warped disk D1 is held in an arbitrary stocker 8, the warped disk D1 can be reliably taken out of the apparatus.

  In the above-described embodiment, the case where the lead difference portion P is set only in one place of the spiral groove 7a of the front-side feed screw member 7A and the rear-side feed screw member 7B has been described, but in the modification shown in FIG. The lead difference portions P1 and P2 are set at two locations in the middle of the spiral groove 7a. Here, the lower lead difference portion P1 is set to a portion from the middle portion of the spiral groove 7a to the equal pitch portion on the lower end side in the same manner as the lead difference portion P of the above-described embodiment. The stocker 8 transferred to P1 assumes a forward leaning posture. On the other hand, the upper lead difference portion P2 is set at a portion from the middle portion of the spiral groove 7a to the equal pitch portion on the upper end side, and the stocker 8 transferred to the lead difference portion P2 is at the front end. On the other hand, it is in a tilted posture with the rear end lowered.

  According to the modified example configured as described above, the warped disc in which the disc D held by the lower stocker 8 among the stockers 8 positioned above and below the stocker 8 holding the selected disc D warps upward. Even if it is D1, the warped disk D1 can be positioned below the lower end surface of the drive unit 4, and the disk D held by the upper stocker 8 is the warped disk D2 warped downward. Even so, the warped disk D2 can be positioned above the upper end surface of the drive unit 4. Therefore, regardless of the warping direction of the disk D held by the stocker 8, the contact between the warping disks D1 and D2 and the drive unit 4 can be reliably avoided, and the drive unit 4 is moved from the retracted position to the drive position. It can be moved smoothly.

  In each of the above embodiments, the selected disk D is pulled out from the stocker 8 and clamped to the drive unit 4. However, the drive position of the drive unit 4 is the disk stored in the stocker 8 at the center of the turntable 4c. It may be set at a position that is coaxial with the center of D, and the selected disk D may be clamped to the drive unit 4 without being pulled out from the stocker 8 so as to be rotationally driven. Further, the drive unit 4 is not limited to move linearly between the retracted position and the drive position, and may be moved by a rotating operation.

It is sectional drawing which abbreviate | omits and shows the internal mechanism of the changer type disc apparatus which concerns on an Example. It is a principal part top view of a disk storage part. It is a principal part side view of a disk storage part. It is a side view which shows the relationship between the drive unit in a retracted position, and a disk storage part. It is a side view which shows the relationship between the drive unit in a drive position, and a disk storage part. It is explanatory drawing which shows the modification of a disk storage part. It is a top view of the disc storage part with which the changer type disc apparatus which concerns on a prior art example is equipped. It is a side view of a feed screw member provided in the disc storage portion. It is explanatory drawing which shows the transfer operation | movement of the stocker by this feed screw member. It is explanatory drawing which shows the problem of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Nose member 2a Insertion port 3 Disc conveyance mechanism 4 Drive unit 4a Support base 4b Spindle motor 4c Turntable 4d Clamper 5 Drive drive mechanism 6 Disc storage part 7 Feed screw member 7a Spiral groove 7A Front feed screw member 7B Rear Side feed screw member 8 Stocker 8a Insertion hole D Disc D1 Warp disc P, P1, P2 Lead difference part

Claims (2)

A plurality of feed screw members having spiral grooves, a plurality of stockers inserted into the feed screw members and engaged with the spiral grooves, and a disk selected from the disks held by these stockers A drive unit for reproducing and / or recording information and a drive drive mechanism for moving the drive unit between a drive position for driving the selected disk and a retracted position for not driving any disk, In a changer type disk device in which each stocker is moved in the vertical direction by synchronously rotating a feed screw member,
Among the lead screw members, a lead difference portion in which the pitch width is partially different is set in the spiral groove of the pair of feed screw members displaced in the moving direction of the drive unit. A changer-type disc device characterized in that the stocker transferred to the difference portion is inclined with respect to the selected disc. 2. The lead difference portion according to claim 1, wherein the lead difference portion is set at two locations of the spiral groove, and the stocker located below the stocker holding the selection disk is in a forward inclined posture at one of the lead difference portions. In addition, the changer-type disk device is characterized in that the stocker positioned above the stocker holding the selected disk is inclined backward at the other lead difference portion.

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