JP4056453B2 - Loading mechanism and optical disk drive device - Google Patents

Description

  The present invention relates to an optical disc drive apparatus for reproducing information recorded on an optical disc or recording information on the optical disc, and a loading mechanism for attaching / detaching the optical disc to / from the optical disc drive main body.

  5, 6 and 7 are plan views showing an example of a conventional loading mechanism. Reference numeral 10 denotes a frame on which various members constituting the loading mechanism are mounted. Reference numeral 11 denotes a chassis on which a spindle motor 12 and a pickup unit 13 are mounted. Reference numeral 14 denotes a tray on which an optical disk is placed. A chassis 11 is attached to the frame 10 so as to be movable in the vertical direction, and a tray 14 is attached above the chassis 11 so as to be slidable in the horizontal direction. 15 is a tray guide member that transmits a driving force for moving the chassis 11 up and down with respect to the chassis 11, 16 is a loading motor that is a power source for the vertical movement of the chassis 11 and the sliding movement of the tray 14, and 17 is a loading motor 16. The gear train which transmits rotation of this to the chassis 11 and the tray 14 is shown.

  A rack portion (not shown) that meshes with the gear train 17 is formed on the side of the tray 14, and the rotation of the loading motor 16 is transmitted to the rack portion via the gear train 17. 5 to 7, the tray 14 slides in and out of the loading mechanism. In the following description, the moving direction of the tray 14 is referred to as a horizontal direction, and in particular, the tray 14 is moved from a state of protruding from the tray 14 as shown in FIG. In the loading state, the moving direction at that time is the loading direction, and on the contrary, moving the tray 14 from the state shown in FIG. 5 to the state shown in FIG. 7 is unloading, and the moving direction at that time is unloaded. This will be referred to as the loading direction. A direction perpendicular to the vertical direction and the horizontal direction is referred to as a vertical direction.

  FIG. 8 is a perspective view showing an example of a tray guide member, in which 15a is a rack portion, 15b is a long hole, and 15c is a boss. The tray guide member 15 is a substantially L-shaped member in a side view, and a rack portion 15a is formed on a side portion on one end portion side in the vertical direction on the upper surface, on a surface on the other end portion side in the vertical direction on the upper surface. A boss 15c is formed. Further, long holes 15b, 15b are formed on the side surface, and the long hole 15b is formed of a slanted portion having an angle with respect to the vertical direction and a straight line portion in the vertical direction connected to both ends of the slanted portion. ing. The long holes 15b and 15b of the tray guide member 15 configured as described above are loosely fitted to pins (not shown) provided at the end of the chassis 11 on the unloading direction side.

  Further, a J-shaped guide groove 14 a is formed on the back surface of the tray 14, and the guide groove 14 a includes a linear portion formed in the side portion of the tray 14 and parallel to the horizontal direction, and unloading of the tray 14. It is formed from a straight line portion parallel to the vertical direction formed at the end portion on the direction side and a curved line portion connecting these two straight line portions. When the chassis 11 and the tray 14 are attached to the frame 10, the boss 15c is loosely fitted in the guide groove 14a as shown in FIGS.

  Next, the operation will be described.

  When the tray 14 is at the position shown in FIG. 5 (hereinafter referred to as the first position), the tray 14 is located above the chassis 11 and an optical disk is placed on the tray 14. The optical disk is chucked by the spindle motor 12. When the loading motor 16 is driven in this state, the tray guide member 15 first slides in the vertical direction via the rack portion 15a. At this time, the pin of the chassis 11 relatively moves in the downward direction along the oblique portion of the long hole 15b, and the chassis 11 is lowered to be in the retracted state. At this time, as shown in FIG. 6, when the boss 15c reaches the curved portion of the guide groove 14a of the tray 14, the tray 14 is pushed out in the unloading direction by the boss 15c, and the guide groove 14a passes through the curved portion. The gear train 17 and the rack portion 15a are disengaged, and the gear train 17 and the rack portion of the tray 14 are engaged. Thereafter, the rotation of the loading motor 16 is transmitted to the tray 14 and the tray 14 moves in the unloading direction, and the optical disk is placed on the tray 14 at a position shown in FIG. It can be moved to a possible position.

  Conversely, when the tray 14 is in the second position, the chassis 11 is positioned below, and when the loading motor 16 is driven in this state, the rotation of the loading motor 16 is transmitted to the tray 14 and the tray 14 Moves in the loading direction. As shown in FIG. 6, the boss 15c reaches the curved portion of the guide groove 14a, and the meshing between the gear train 17 and the rack portion of the tray 14 is released while the boss 15c passes through the curved portion. The gear train 17 and the rack portion 15a mesh with each other. When the boss 15c passes through the curved portion and enters the straight portion, the movement of the tray 14 is finished and placed in the second position, and then the pin of the chassis 11 moves relative to the oblique portion of the long hole 15b in the upward direction. Then, the retracted chassis 11 is raised. At this time, when an optical disk is placed on the tray 14, the optical disk is chucked by the spindle motor 12.

Thus, in the conventional loading mechanism, a tray loading operation and a chassis retracting operation for avoiding interference with the chassis on which the pickup unit is mounted during tray conveyance are performed by one loading motor. is there.
JP 2002-298548 A JP 2000-311410 A

  Here, let us consider a case where the optical disk apparatus having the above-described loading mechanism is transported. During transportation, the tray cannot be held sufficiently when an external force is applied at the second position, and when it is in the second position, the projected area of the device generally increases and transportation efficiency decreases. It is in the first position that is excellent in transport efficiency.

  Next, consider a case where a large external force is applied to the apparatus in this state. In general, the main parts of the loading mechanism are made of resin because the information recording medium made of resin is not damaged, the entire device is lightened, and complicated shapes can be manufactured at low cost. Often to do. For this reason, when a large external force is applied, each portion is greatly elastically deformed, and there is a problem that the guide groove provided on the tray and the projection on the tray guide component are disengaged and the tray protrudes to the outside.

  An object of the present invention is to solve such problems and to provide a loading mechanism and an optical disk drive device excellent in impact resistance without adding new parts.

  In order to achieve the above object, an invention according to claim 1 is provided in a main body of an apparatus for recording / reproducing information on an information recording medium, and includes a tray on which the information recording medium is mounted, and the tray as an information recording medium. And a drive means for moving the tray and the main body relative to each other so as to be positioned at a first position for recording / reproducing information and a second position for exchanging information recording media. A first moving section from the first position to a predetermined position near the first position in the tray, the connection between the tray and the driving means is released, and the second position is moved from the predetermined position to the second position. In the second movement section up to the position, the tray and the driving means are connected, and when the tray is in the second movement section, the connection between the guide means and the driving means is released. In the loading mechanism configured to move the tray in conjunction with the guide means when the tray is in the first movement section, the tray is moved only when the tray is in the first position on the guide member. An engagement portion that engages with a part and restricts movement of the tray to the second position side is provided.

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, when the tray is in the first position, the engaging portion contacts a part of the tray.

  The invention according to claim 3 is the invention according to claim 1, wherein when the tray is in the first position, the engaging portion is close to a part of the tray, and an external force acts on the main body to The loading mechanism according to claim 1, wherein the engaging portion contacts a part of the tray when some of the components are elastically deformed.

  According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, the engaging portion is provided with a step so that a base side is thin and a tip end portion is thick, and the engaging portion is opposed to the engaging portion on the tray. And the to-be-engaged part which has the level | step difference which the base side is thin and the front-end | tip part becomes thick is provided.

  The invention according to claim 5 is the invention according to claim 4, wherein the engaging portion is formed of a protrusion, and the engaged portion is formed of a groove or a protrusion.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein a plurality of the engaging portions are provided.

  According to a seventh aspect of the present invention, in the optical disk drive device, the loading mechanism according to any one of the first to sixth aspects is provided.

  According to the present invention, by using the present invention, the tray retainability can be improved without adding new parts, without increasing the size of the apparatus, and the tray protrudes to the outside by an external force. Can be prevented.

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

  FIG. 1 is a plan view showing a loading mechanism according to the first embodiment of the present invention, in which 14 b is a protrusion provided on the back surface of the tray 14, and 15 d is a boss provided on the upper surface of the tray guide member 15. In addition, about the member in the prior art shown in FIGS. 5-7, the same code | symbol is attached | subjected about the same member or a member of the same function, and detailed description is abbreviate | omitted.

  When the tray 14 is moved in the loading direction and moved from the second position to the first position and the tray guide member 15 slides, the boss 15d is positioned on the unloading direction side with respect to the protrusion 14b, and the protrusion 14b is the boss. 15d abuts.

  With this configuration, when the tray 14 is in the first position, the tray 14 is moved in the unloading direction at the contact portion between the boss 15c and the guide groove and the contact portion between the boss 15d and the protrusion 14b. Be regulated. As a result, when an external force is applied to the loading mechanism of the present embodiment, the load is distributed and supported at a plurality of contact points, so that the fitting between the tray 14 and the tray guide member 15 is disengaged as in the prior art. Large elastic deformation hardly occurs, and the tray 14 can be prevented from protruding to the outside.

  In the configuration shown in FIG. 1, the example in which the contact points are the contact part between the boss 15c and the guide groove and the contact part between the boss 15d and the protrusion 14b has been described. Even if more contact sites are provided at 15, the same effects as in this embodiment can be obtained.

  Further, according to the present embodiment, the tray 14 is not provided with the two guide grooves 14a, but the boss 15d is formed in a part of the tray guide member 15, and the tray guide member 15 slides to the first position. By configuring so that there are a plurality of contact points when coming, it is possible to prevent the driving load during the loading operation from being reduced and affecting the life of the loading mechanism.

  In addition, it is conceivable to increase the mating dimensions without increasing the contact area, but in that case the tray is thick, the height of the tray guide part is increased, the equipment is enlarged, and the clearance of another part is increased. There is a possibility that it cannot be secured sufficiently. On the other hand, according to the present embodiment, it is possible to eliminate the increase in size with the same outer dimensions as those of the conventional apparatus without adding new parts, and it is possible to improve the tray retainability. .

  FIG. 2 is a plan view showing a loading mechanism according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected about the member in 1st Embodiment shown in FIG. 1, and the member same or the same function, and detailed description is abbreviate | omitted.

  In the first embodiment shown in FIG. 1, the boss 15d and the protrusion 14b come into contact with each other when the tray 14 is in the first position, whereas in the second embodiment, the boss is in the state where the tray 14 is in the first position. 15d and the protrusion 14b are close to each other so as to have a predetermined clearance D. That is, in the first embodiment, there are two contact points when the tray 14 comes to the first position, but in the second embodiment, there is one contact point when the tray 14 comes to the first position. It is. The clearance D between the boss 15d and the protrusion 14b is set to such an extent that the boss 15d and the protrusion 14b come into contact when an external force acts on the loading mechanism and various members are elastically deformed.

  According to the second embodiment configured as described above, since the number of contact points when the tray 14 comes near the first position is smaller than that of the configuration of the first embodiment, the tray guide member 15 is slid. The load on is reduced. As a result, the load of the loading mechanism during normal operation is exactly the same as that of the conventional loading mechanism, so that the lifetime of the entire loading mechanism can be extended.

  Further, since an external force that causes the tray 14 and the tray guide member 15 to be disengaged is accompanied by a very large elastic deformation, even if it is configured not to contact in the operation of a normal part, the contact point is applied when the external force is applied. As a result, the load can be dispersedly supported. For this reason, elastic deformation due to external force proceeds immediately until the contact point increases.However, since the load is dispersed at the time of contact and the amount of elastic deformation is suppressed, the size of the apparatus can be increased without adding new parts. Thus, the tray retainability can be improved without the need to change the size.

  FIG. 3 is a cross-sectional view showing a configuration in the vicinity of a fitting portion between the boss of the tray guide member and the guide groove of the tray, which is a main part of the loading mechanism according to the third embodiment of the present invention. In the third embodiment, two protrusions 14b and 14b are arranged opposite to each other on the tray 14, and the protrusions 14b and 14b are formed on both sides of the boss 15d of the tray guide member 15 when the tray 14 is in the first position and in the loading state. 14b is positioned.

  By configuring in this way, the movement of the tray 14 in the unloading direction side is restricted, so that the tray 14 can be prevented from protruding to the outside as in the first embodiment. Further, since the movement of the tray 14 in the loading direction is restricted, it is possible to prevent a problem that the projection of the chassis 11 (not shown) that fits into the long hole 15b of the tray guide member 15 is detached.

  As shown in FIG. 3, when the cross-sectional shapes of the boss 15d of the tray guide member 15 and the guide groove 14b of the tray 14 are rectangular, the tray 14 moves in the loading direction when the tray 14 is at the first position. Is regulated by the engagement between the boss 15c and the guide groove 14a or the boss 15d and the projections 14b and 14b, but the movement in the vertical direction is not regulated. Therefore, when a large external force is applied, each part may be elastically deformed and the projection 14b may get over the boss 15d. In order to restrict the movement in the vertical direction, it is conceivable to lengthen the boss 15d and the protrusions 14b and 14b. However, in this case, the apparatus may be increased in size.

  The fourth embodiment described below has been made in view of this point.

  FIG. 4 is a cross-sectional view showing a configuration in the vicinity of a fitting portion between the boss of the tray guide member and the guide groove of the tray, which is a main part of the loading mechanism according to the fourth embodiment of the present invention. The loading mechanism of the fourth embodiment is provided with steps at the tip portions of the protrusions 14b and 14b and the tip portion of the boss 15d in the third embodiment shown in FIG.

  As shown in FIG. 4, the boss 15d on the tray guide member 15 has a step formed so that the tip is thick and the root is thin, and the protrusion 14b on the tray 14 is also overhanged at the tip. Configure to be stepped. When the tray 14 reaches the first position and the tray guide member 15 slides and loading is completed, the boss 15d is fitted between the protrusions 14b and 14b.

  Consider a case in which an external force that causes the tray 14 to be disengaged from the tray guide member 15 is applied to the fitting of such a configuration. Since the tray 14 is restrained by the frame 10 except for the degree of freedom other than sliding between the first position and the second position, the tray 14 applies a force to the tray guide member 15 in the direction of the second position. However, it tries to rise upward. At this time, since the force is received in the direction in which the step between the boss 15d and the protrusions 14b and 14b is tightly coupled, the protrusion 14b does not come off the boss 15d.

  With this configuration, it is possible to improve the tray retainability without adding new parts, without increasing the size of the apparatus, and without affecting the life of the loading mechanism.

  In addition, although the structure of 4th Embodiment was demonstrated using the structure of 3rd Embodiment, a level | step difference is formed in the front-end | tip part of the processus | protrusion 14b and the boss | hub 15d also in 1st, 2nd embodiment, and it moves to an up-down direction. You may comprise so that it may regulate. By including this configuration, it is possible to more reliably prevent a problem that the tray 14 protrudes to the outside due to an external force.

  The present invention can be used in the field of optical disk apparatuses that record / reproduce information using optical disks such as CD-ROM, CD-R / RW, DVD-ROM, DVD + R / RW, and DVD-R / RW.

The top view which shows the loading mechanism of 1st Embodiment of this invention. The top view which shows the loading mechanism of 2nd Embodiment of this invention. Sectional drawing which shows the structure of the fitting site | part vicinity of the boss | hub of the tray guide member which is the principal part of the loading mechanism in 3rd Embodiment of this invention, and the guide groove of a tray. Sectional drawing which shows the structure of the fitting site | part vicinity of the boss | hub of the tray guide member which is the principal part of the loading mechanism in 4th Embodiment of this invention, and the guide groove of a tray. Plan view showing an example of a conventional loading mechanism Plan view showing an example of a conventional loading mechanism Plan view showing an example of a conventional loading mechanism A perspective view showing an example of a tray guide member

Explanation of symbols

10 Frame 11 Chassis 12 Spindle motor 13 Pickup unit 14 Tray 14a Guide groove 14b Protrusion 15 Tray guide member 15a Rack portion 15b Long holes 15c, 15d Boss 16 Loading motor 17 Gear train

Claims (7)

  Exchange of information recording medium, etc. provided in the main body of the apparatus for recording / reproducing information of the information recording medium, a tray on which the information recording medium is mounted, a first position for recording / reproducing information on the information recording medium using the tray Driving means for relatively moving the tray and the main body so as to be positioned at a second position where the tray is positioned, and guide means for moving in connection with the driving means, from the first position on the tray. The connection between the tray and the driving means is released in a first movement section to a predetermined position near the first position, and the tray and the driving means are used in a second movement section from the predetermined position to the second position. Further, when the tray is in the second movement section, the guide means and the driving means are disconnected, and the tray is in the first movement section. In the loading mechanism for moving the tray in conjunction with the guide means, the guide member is engaged with a part of the tray only when the tray is at the first position, and the second position side of the tray. A loading mechanism characterized in that an engaging portion for restricting the movement to is provided.   The loading mechanism according to claim 1, wherein the engaging portion contacts a part of the tray when the tray is in the first position.   When the tray is in the first position, the engaging portion comes close to a part of the tray, and when the external force acts on the main body and some of the components in the main body are elastically deformed, the engaging portion is The loading mechanism according to claim 1, wherein the loading mechanism contacts a part of the tray.   The engagement portion is provided with a step so that the base side is thin and the tip end portion is thick, and the engaged portion is provided on the tray so as to face the engagement portion and have a step such that the base side is thin and the tip end portion is thick. The loading mechanism according to claim 1, wherein the loading mechanism is provided.   The loading mechanism according to claim 4, wherein the engaging portion is formed of a protrusion, and the engaged portion is formed of a groove or a protrusion.   The loading mechanism according to claim 1, wherein a plurality of the engaging portions are provided.   An optical disc drive apparatus comprising the loading mechanism according to claim 1.

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