JP2007026622A - Loading mechanism of disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To absorb backlashing of a tray at an ejection position without deteriorating tray slidability and without increasing a tray driving load. <P>SOLUTION: A shaft member (41) extending along in loading and ejection direction is provided at one side of the tray (40), and a bearing (21) provided in a drive body (20) supports the shaft member (40) in a freely slidable way and holds the tray (40) in a freely loadable and ejectable way. A cam (43) projecting outward laterally is provided at the back of the other edge of the tray (40). Rollers (23) whose perimeter surfaces project outward at an ejection position of the tray (40) in front of the drive body (20), facing the cam (43) are arranged so as to make an interval between the shaft member (41) and the perimeter surfaces of the rollers (23) narrower than an interval between the shaft member (41) of the tray (40) and the projecting cam (43) to the extent of causing elastic deformation in the tray (40). The perimeter surfaces of the rollers (23) press the projecting cam (43) to thereby absorb backlashing of the tray (40) at the ejection position. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tray loading mechanism in a disk apparatus that performs reproduction or recording / reproduction of a disk such as an optical disk, and more particularly to loading a disk apparatus having means for absorbing tray backlash at a tray unloading position in order to improve quality. Regarding the mechanism.

  In a conventional disk device, as a means for absorbing tray backlash at the tray unloading position, for example, by simply reducing the clearance between the width of the guide portion of the chassis and the width of the tray at the tray unloading position, There is something to prevent backlash.

In addition, there is a structure in which a tray is guided by a rail and a rail groove, and a roller is urged to the tray by a spring so as to absorb the backlash of the tray (for example, see Patent Document 1).
Japanese Utility Model Publication No. 5-15151

  However, the conventional apparatus as described above has the following problems.

  In other words, as in the former case, if the clearance between the guide portion of the chassis and the width of the tray is simply reduced to prevent backlash of the tray, if the clearance is too small, the tray slides. There is a possibility that the mobility becomes worse and the driving force of the tray increases or the insertion force when pushing by hand to carry in the tray increases.

  On the other hand, when the clearance is increased, there is a problem that the play becomes large at the tray unloading position and the quality is deteriorated.

  In the latter case, if the tray is guided by the rail and the rail groove and the roller is biased to the tray by a spring so as to absorb the backlash of the tray, the rail and rail groove There was a possibility that the slidability was poor due to the friction between them and the driving force increased.

  In addition, the roller is biased by a spring, which increases the number of parts and increases the cost.

  The present invention has been made to solve the above-described problems, and can absorb backlash of the tray at the unloading position without deteriorating the slidability of the tray and without increasing the driving load of the tray. It is an object of the present invention to provide a loading mechanism for a disk device.

  According to a first aspect of the present invention, there is provided a loading mechanism for a disk device, in which a tray on which a disk is loaded is loaded into and unloaded from a main body of the disk device along a loading / unloading direction on either the left or right side of the tray. By providing a shaft member extending in a slidable manner, the shaft member is slidably supported by a bearing provided in the apparatus main body, and the other side of the tray is guided by regulating the height by a guide portion provided in the apparatus main body. The tray is configured to hold the tray so that it can be carried in and out, and a protruding cam that protrudes laterally is provided at the rear of the other side of the tray. The distance between the shaft member and the peripheral surface of the roller member is smaller than the distance between the shaft member of the tray and the overhanging cam. Placed, by elastically deforming the tray periphery presses the projecting cam of the roller member, and is characterized in that to absorb the tray rattling in the unloading position.

  A loading mechanism for a disk device according to a second aspect of the present invention is the loading mechanism for a disk device according to the first aspect, wherein the roller member is a region corresponding to the front and rear ends of the bearing in the tray loading / unloading direction. It is characterized by being arranged inside.

  As described above, according to the present invention, in the loading mechanism of the disk device for loading / unloading the tray on which the disk is loaded into / from the apparatus main body, a shaft member extending along the loading / unloading direction is provided on either the left or right side of the tray. The shaft member is slidably supported by a bearing provided in the apparatus main body, while the other side of the tray is guided by regulating the height by a guide portion provided in the apparatus main body, so that the tray can be carried in and out. In this configuration, an overhanging cam projecting laterally is provided behind the other side of the tray, and at least one roller member whose circumferential surface faces the overhanging cam at the tray unloading position is provided in front of the apparatus main body. The roller member is disposed such that the space between the shaft member and the peripheral surface of the roller member is narrower than the space between the shaft member of the tray and the overhanging cam. By pressing the overhang cam and elastically deforming the tray, it is configured to absorb the backlash of the tray at the unloading position, so that the sliding property of the tray is not deteriorated and the driving load of the tray is not increased. There is an effect that the play of the tray can be absorbed at the unloading position.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view showing a disc apparatus with a loading mechanism according to an embodiment of the present invention, in which the tray is further removed from the carry-out position in the carry-out direction, and FIG. 2 is a perspective view showing a state where the tray is in the carry-in position. FIG.

  The disk device 10 includes an apparatus main body 20 and a tray 40 that is carried into and out of the apparatus main body 20.

  When the tray 40 is in the unloading position, a cartridge containing a disk (optical disk) (not shown) or a plurality of single disks (optical disks) can be placed on the tray 40.

  When the tray 40 is in the carry-in position, a disk (optical disk) or a single disk (optical disk) contained in the cartridge is positioned at a predetermined position of the disk device 10 and is mounted on the spindle motor 51.

  The spindle motor 51 is attached to a traverse base 50 held by the apparatus main body 20 together with a pickup 52.

  As shown in FIG. 3, a shaft (shaft member) 41 extending along the carry-in / carry-out direction is provided on the back surface on the right side of the tray 40 toward the apparatus main body 20. As shown in FIGS. 1 and 4, the shaft 41 is slidably supported by a bearing 21 provided on the right side of the apparatus main body 20.

  As shown in FIGS. 1 and 2, the left edge 42 of the tray 40 is guided by the guide portion 22 provided on the left side of the apparatus main body 20 with its height direction regulated. That is, the plurality of guide protrusions 22a support the left edge 42 from below, and the plurality of guide claws 22b regulate the upper position of the left edge 42 so that the left edge 42 of the tray 40 22 is guided along the reciprocating direction.

  Thereby, the tray 40 is held by the apparatus main body 20 so as to be able to be carried in and out in a state where the tray 40 is kept horizontal.

  As shown in FIG. 3, a rack 44 extending in parallel with the shaft 41 is formed on the right rear surface of the tray 40. As shown in FIG. 4, the rack 44 meshes with the tray drive gear 33 of the drive means 30 provided in front of the apparatus main body 20.

  As shown in FIG. 4, the drive unit 30 includes a loading motor 31, a speed reduction mechanism, and a tray drive gear 33. The tray drive gear 33 is driven by the rotation of the loading motor 31 being decelerated by the speed reduction mechanism 32, so that the tray 40 is driven between the carry-out position and the carry-in position by the tray drive gear 33. The

  As shown in FIGS. 5 and 6, a projecting cam 43 projecting sideways is formed behind the left edge 42 of the tray 40.

  In addition, two rollers 23, 23 whose circumferential surfaces face the cam 43 at the position where the tray 40 is carried out are attached to the left front of the apparatus body 20 so as to be rotatable around a vertical axis.

  The rollers 23 and 23 are so narrow that the distance between the shaft 41 and the peripheral surfaces of the rollers 23 and 23 is elastically deformed to the tray 40 as compared with the distance between the shaft 41 of the tray 40 and the overhanging cam 43. It is arranged in.

  Therefore, when the tray 40 is driven in the carry-out direction from the carry-in position in the apparatus main body 20 and approaches the carry-out position, the peripheral surfaces of the rollers 23 and 23 push the cam 43 and elastically deform the tray 40 to carry out the carry-out. The backlash of the tray 40 can be absorbed at the position.

  As shown in FIG. 7, the rollers 23, 23 are arranged in a region corresponding to both the front and rear ends of the bearing 21 with respect to the loading / unloading direction of the tray 40. For this reason, the opposing forces F1 and F2 generated by the rollers 23 and 23 and the bearing 21 correspond to positions in the carry-in / carry-out direction, so that no extra moment force is generated.

  On the other hand, as shown in FIG. 8, when the rollers 23 and 23 are arranged in a region corresponding to both the front and rear ends of the bearing 21 in the loading / unloading direction of the tray 40, the rollers 23 and 23 and the bearing 21 are arranged. Since the opposing forces F1 and F2 generated in the above do not correspond to the positions in the loading / unloading direction, a moment force M as shown in FIG. 8 is generated in the tray 40, and the sliding property of the tray 40 is deteriorated.

  Note that the number of rollers 23 and 23 is not limited to two, and may be any number as long as it is one or more.

  As described above, the disk device 10 can absorb the backlash of the tray 40 at the carry-out position by pressing the overhanging cam 43 of the tray 40 by the rollers 23 and 23 at the carry-out position of the tray 40. The quality of the loading mechanism can be improved.

  In particular, in the disk device 10, the backlash of the tray 40 can be absorbed without increasing the driving load of the tray 40 by being slidably supported by the shaft 41 and pressed by the rollers 23 and 23. is there.

  Further, since the force for pressing the rollers 23 and 23 is generated by elastic deformation of the tray 40 formed of resin, it is not necessary to use a special urging means, so that the number of parts can be reduced and the cost can be reduced. It is possible.

  In addition, the rollers 23, 23 are pressed by the rollers 23, 23 by providing the positions of the rollers 23, 23 in the tray loading / unloading direction in a region corresponding to both the front and rear ends of the bearing 21 of the shaft 41 provided on the tray 40. In this case, an excessive moment force is not generated in the tray 40, and the slidability of the tray 40 can be kept good.

FIG. 4 is a perspective view showing a disc device with a loading mechanism according to an embodiment of the present invention with the tray further removed from the carry-out position in the carry-out direction for explanation. It is a perspective view which shows the state which has a tray in a carrying-in position. It is the perspective view which looked at the tray from the bottom side. It is a perspective view which expands and shows the principal part of FIG. It is the perspective view which looked at the part of FIG. 4 from another angle. It is a top view which shows the relationship between the overhanging cam and roller when a tray exists in an unloading position. It is a bottom view which shows the relationship between a bearing and a roller when a tray exists in an unloading position. FIG. 7 is a reference diagram illustrating a state in which a moment is generated when a roller is arranged to be shifted from the position illustrated in FIG. 6.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Disc apparatus 20 Apparatus main body 21 Bearing 22 Guide part 22a Guide protrusion 22b Guide claw 23 Roller 30 Drive means 31 Loading motor 32 Deceleration mechanism 33 Tray drive gear 40 Tray 41 Shaft (shaft member)
42 Left edge 43 Overhang cam 44 Rack 50 Traverse base 51 Spindle motor 52 Pickup

Claims (2)

In the loading mechanism of the disk device that carries the tray on which the disk is loaded into and out of the apparatus main body,
A shaft member extending along the loading / unloading direction is provided on either the left or right side of the tray, and the shaft member is slidably supported by a bearing provided on the apparatus main body, while the other side of the tray is provided on the apparatus main body. By controlling the height with the guide section and guiding the tray, the tray can be carried in and out freely.
A protruding cam that protrudes laterally is provided at the rear of the other side of the tray, and at least one roller member whose circumferential surface faces the protruding cam at the tray unloading position is disposed in front of the apparatus main body. Arranged so that the interval between the shaft member and the peripheral surface of the roller member is narrower than the interval between the member and the overhanging cam,
A loading mechanism for a disk device, wherein the circumferential surface of the roller member presses the overhanging cam and elastically deforms the tray to absorb play in the tray at the unloading position.   2. The loading mechanism for a disk apparatus according to claim 1, wherein the roller member is disposed in a region corresponding to both the front and rear ends of the bearing with respect to the loading / unloading direction of the tray.

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