JP2008186559A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the situation that a hook part of a locking mechanism is accidentally separated from a receiving part only by devising a structure of a slider pushing member in a disk device. <P>SOLUTION: In the disk device provided with a slider 60 attached to a chassis 10, a rack 61 provided at the slider 60, a movable chassis 50 provided with an optical pickup 30 and the like and vertically movably attached to the chassis 10, a cam mechanism linking vertical operation of the movable chassis 50 to reciprocation of the slider 60 and a pinion 62 engaging with the rack 61 to reciprocate the slider 60, engagement of the rack 61 with the pinion 62 comes off at the time of an operation mode of the optical pickup 30. The locking mechanism 80 is provided with a receiving part 81 on the chassis 10 side and a hooking part 82 on the slider 60 side. A resin spring part 67 is incorporated to a rib-shaped slider pressing member 67 to compress the slider 60. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disk device, in particular, a lock for positioning a reciprocally movable slider (cam slider) for raising and lowering a movable chassis (drive chassis) including an optical pickup and a turntable via a cam mechanism at a predetermined position. The present invention relates to a disk device having a mechanism.

  In a disc player, which is an example of a disc device, a disc is received from the disc tray to the turntable or transferred from the turntable to the disc tray through an elevating operation of a drive chassis including an optical pickup and a turntable, and the drive chassis is raised and lowered. Conventionally, the operation is performed through the reciprocation of the cam slider (see, for example, Patent Document 1).

  In such a disk device, for example, when a single motor is shared as a drive source for performing a running operation in the operation mode of the optical pickup, a disk tray withdrawing / withdrawing operation, a reciprocating movement operation of the cam slider, etc. In the pickup operation mode, it is required to position the cam slider at a fixed position. Therefore, conventionally, a lock mechanism has been employed as a means for positioning the cam slider at a fixed position.

  FIG. 3 is a schematic plan view showing the basic configuration of the disk device. The basic configuration and operation of the disk device, the configuration and operation of the lock mechanism, etc. will be described next with reference to FIG.

  In FIG. 3, reference numeral 10 denotes a chassis made of a resin molded body commonly called a loader chassis. A disk tray 20 indicated by a virtual line (two-dot chain line) is assembled to the chassis 10 so as to be retractable. The disk (not shown) can be supplied / discharged to / from the disk device by the withdrawal operation of the disk tray 20.

  A movable chassis 50 as a drive chassis to which the optical pickup 30 and the rotary table 40 are assembled is attached to the chassis 10, and the movable chassis 50 is attached to the chassis 10 around a fulcrum 50 a indicated by a one-dot chain line in the drawing. On the other hand, it can be moved up and down. Further, a slider 60 as a cam slider is attached to the chassis 10 so as to be able to reciprocate. The slider 60 and the movable chassis 50 are connected by a cam mechanism, and the raising / lowering motion of the movable chassis 50 is changed to the reciprocating movement of the slider 60. It is linked. In the illustrated disk device, the cam mechanism includes a boss 70 provided at the free end of the movable chassis 50, and a cam groove (not shown) provided on the slider 60 and slidably engaged with the boss 71. When the slider 60 reciprocates left and right as indicated by arrows X1 and X2, the boss 71 of the cam mechanism moves up and down, and the movable chassis 50 moves up and down around the fulcrum 50a as the boss 71 moves up and down. . When the movable chassis 50 is raised, the turntable 40 receives the disk loaded by the disk tray 20 and cooperates with a clamper (not shown) to clamp the disk. On the other hand, when the movable chassis 50 is lowered, the clamp state of the disk is released, and the disk is transferred from the turntable 40 to the disk tray 20 so that the disk is ejected by the disk tray 20.

  The traveling of the optical pickup 30 in the operation mode is performed by transmitting the rotation of the pinion 32 to the rack 31 provided in the optical pickup 30, whereas the reciprocating movement of the slider 60 in the directions of arrows X1 and X2 is performed. The rotation of another pinion 62 is transmitted to the rack 61 provided on the slider 60. In this case, since the traveling of the optical pickup 30 in the operation mode is performed when the turntable 40 cooperates with the clamper to clamp the disc, the driving sources of the two pinions 32 and 62 described above are used. In the case where one motor is shared and no path switching mechanism such as a clutch is interposed in the transmission path from the motor to each of the pinions 32 and 62, the rotation of another pinion 62 is caused during the operation mode of the optical pickup 30. Measures must be taken to prevent the slider 60 from being transmitted to the rack 61.

  3, the position where the rack 61 and the pinion 61 are disengaged and the rack 61 faces the pinion 62 with a space therebetween is determined as the forward movement limit position of the slider 60, as shown. The shape of the cam groove of the cam mechanism is determined so that the movable chassis 50 is lifted and the clamped state with respect to the disk is maintained when the slider 60 is pushed to reach the forward limit position. In addition, the slider 60 is positioned at its forward movement limit position by the action of a lock mechanism 80 described later.

  On the other hand, in the disk device of FIG. 3, the drive source for causing the disk tray 20 to move in and out also shares a motor as a drive source for the optical pickup 30 and the slider 60, and at the same time, the rack 61 of the slider 60. The tray gear 21 provided integrally with the pinion 62 that can mesh with the rack 22 is made to correspond to the rack 22 provided on the back surface of the disk tray 20. Thus, when the optical pickup 30 is in the operation mode, the rack 22 is opposed to the tray gear 21 with a gap so that the rotation of the tray gear 21 is not transmitted to the rack 22 of the disk tray 20. . When unloading the disk by the disk tray 20, the slider 60 is moved back in the direction of the arrow X2 before the disk tray 20 is moved back in the disk unloading direction. The protrusions 63 are guided to the inclined cam grooves 23 provided on the back surface of the disk tray 20 to slightly retract the disk tray 20 so that the rack 22 is engaged with the disk gear 21.

  Here, prior to retracting the disk tray 20 in the disk unloading direction, the positioning state of the slider 60 by the lock mechanism 80 is released, or the slider 60 is initially moved in the backward movement direction (arrow X2). The disk device uses an operation of returning to the initial position of the optical pickup 30 indicated by an arrow Y1 in FIG. 3 when the optical pickup 30 is switched from the operation mode to the non-operation mode. This point will be described next with reference mainly to the drawings and FIG.

  4A is an explanatory view showing the positional relationship between the rack 31 and the slider 60 immediately before the slider 60 is initially moved in the backward movement direction, and FIG. 4B is a lock mechanism 80 in the same state. FIG. 5A is an explanatory diagram showing the positional relationship between the rack 31 and the slider 60 when the slider 60 is initially moved in the backward movement direction, and FIG. ) Is an explanatory view showing a state of the lock mechanism 80 in the same state.

  The lock mechanism 80 is positioned at the forward limit position in the operation mode of the optical pickup 30 by being engaged with the receiving portion 81 provided on the chassis 10 side and the receiving portion 81 provided on the slider 60 side. A hook portion 82 that maintains the slider 60 in its forward movement limit position is provided, whereas a lock release pin 33 is provided in the rack 31 of the optical pickup. Further, the cam pins 34 are provided on the rack 31, whereas the cam grooves 64 provided on the slider 60 side are provided.

  With such a configuration, when the optical pickup 30 is switched from the operation mode to the non-operation mode and returns to the initial position as shown by the arrow Y1 in FIG. 3, the figure from FIG. 5B, the lock release pin 33 provided on the rack 31 moves in the same direction (Y1) as the optical pickup 30, so that the lock release pin 33 pushes the hook portion 82 and receives the receiving portion 81. Remove from. 4A to 5A, the cam pin 34 provided on the rack 31 also moves in the same direction (Y1) as the optical pickup 30, and the lock release pin 33 moves the hook portion 82 over. Immediately after being pushed and removed from the receiving portion 81, the cam pin 34 engages with a cam groove 64 provided on the slider 60 side, and the slider 60 is initially moved in the backward movement direction X2 from the forward limit position shown in FIG. As a result, the rack 61 of the slider 60 engages with the pinion 62. For this reason, when the optical pickup 30 returns to the initial position, the rack 61 of the slider 60 is engaged with the pinion 62, the rotation of the pinion 62 is transmitted to the rack 61, the slider 60 moves backward, and the reverse movement causes the pin 63 to rotate. (Refer to FIG. 3) is guided to the guide groove 23 on the disk tray 20 side, and the disk tray 20 is slightly retracted, whereby the rack 22 on the disk tray 20 side is engaged with the disk gear 21, and the disk tray 20 is moved in the disk unloading direction. fall back.

  By the way, the slider 60 is slidably assembled to the slide seat 24 provided in the chassis 10 in such a manner that no significant backlash occurs in a direction orthogonal to the sliding direction (reciprocating direction). In some cases, the hook portion 82 of the lock mechanism 80 may be inadvertently detached from the receiving portion 81 due to the rattling, and the slider 60 may perform an unexpected operation, for example, an initial movement in the backward movement direction. is there. If such an unexpected initial movement of the slider 60 is performed, the rack 61 of the slider 60 may be engaged with the pinion 62, causing a failure or causing the disk device to malfunction.

Therefore, conventionally, the countermeasure shown in FIG. 6 has been taken. FIG. 6 is a plan view of the main part of a conventional disk device. In this disk device, a slider 60 is provided with a projecting piece 65, and the slider 60 is located at the forward limit position as shown in FIG. In some cases, a rib-like slider pressing member 66 provided on the chassis 10 side is brought into contact with the projecting piece portion 65 so that the hook portion 82 engaged with the receiving portion 81 of the lock mechanism 80 becomes the receiving portion. It was prevented from coming off from 81.
JP 2005-228441 A

  However, as described with reference to FIG. 6, the lock mechanism 80 is simply adopted by adopting a structure in which the protruding piece 65 of the slider 60 is brought into contact with the rib-like slider pressing member 66 provided on the chassis 10 side. The hook portion 82 of the lock mechanism 80 is not necessarily prevented from being detached from the receiving portion 81, and the hook portion 82 of the locking mechanism 80 is unexpectedly detached from the receiving portion 81 due to the rattling of the slider 60 described above. It was found difficult to prevent reliably.

  The present invention has been made in view of the above situation. The hook of the lock mechanism 80 can be obtained only by devising the structure of the slider pressing member 66 described with reference to FIG. 6 without increasing the number of necessary parts. An object of the present invention is to provide a disk device that can reliably prevent a situation in which the part 82 is accidentally detached from the receiving part 81.

  A disk device according to the present invention comprises a slider mounted on a chassis forming a frame frame so as to be reciprocally movable, a rack provided on the slider, an optical pickup and a turntable, and can be moved up and down. An attached movable chassis, a cam mechanism for connecting the slider and the movable chassis to interlock the up-and-down movement of the movable chassis with the reciprocating movement of the slider, and meshing with the rack and rotating forward and backward. And a pinion for reciprocating the slider, wherein the slider is pushed all the way to the forward limit position in the operation mode of the optical pickup, the rack is disengaged from the pinion, and the optical pickup When switching from operating mode to non-operating mode Slider above the rack to initial movement is adapted to mesh with the pinion in the backward direction from the forward limit position. Further, the receiving portion provided on the chassis side and the slider provided on the slider side and engaged with the receiving portion to move the slider located at the forward limit position in the operation mode of the optical pickup to the forward position. A lock mechanism having a hook portion for maintaining the movable limit position, and the hook portion that is in contact with the slider positioned at the forward limit position and engages with the receiving portion is disengaged from the receiving portion. And a rib-shaped slider pressing member. Then, elasticity is applied to the rib-shaped slider pressing member, and the slider pressing member is pressed against the slider so that the hook portion is pressed in a direction to increase the engagement width between the receiving portion and the hook portion. Yes.

  When this configuration is adopted, the hook portion engaged with the receiving portion is constantly pressed in the direction of increasing the engagement width by the elasticity imparted to the rib-shaped slider pressing member, so that the lock mechanism It is difficult for the hook part of this to accidentally come off the receiving part. For this reason, unexpected movement of the slider due to the hook part being accidentally detached from the receiving part, for example, initial movement in the backward movement direction, and the slider rack meshes with the pinion, causing failure. It is possible to prevent such a situation that the disk device malfunctions.

  In the present invention, it is desirable that the slider pressing member is integrally formed with the chassis with resin. Further, the slider pressing member includes a rib portion that is continuous with the chassis, and a resin spring portion that is a plate piece that is connected to the rib portion in a cantilever manner. It is desirable to do. According to each of these inventions, it is not necessary to use a separate part as the slider pressing member.

  The disk device according to the present invention is further embodied by adopting the following configuration. That is, a slider attached to the chassis forming the frame frame so as to be reciprocally movable, a rack provided in the slider, a movable chassis provided with the optical pickup and a turntable and attached to the chassis so as to be movable up and down. A cam mechanism for connecting the slider and the movable chassis to link the lifting and lowering movement of the movable chassis with the reciprocating movement of the slider; and a reciprocating movement of the slider by meshing with the rack and rotating forward and reverse. A pinion that moves the slider to the forward limit position during the operation mode of the optical pickup, disengages the rack from the pinion, and the optical pickup moves from the operation mode to the non-operation mode. When the slider is switched to The rack is initially moved in the backward direction from the position so that the rack is engaged with the pinion, and the receiving portion provided on the chassis side and the receiving portion provided on the slider side are engaged with the receiving portion. A hook mechanism for maintaining the slider positioned at the forward limit position in the forward limit position during the operation mode of the optical pickup, and the slider positioned at the forward limit position. A rib-like slider pressing member that prevents the hook portion that contacts and engages with the receiving portion from being removed from the receiving portion, wherein the rib-shaped slider pressing member is the chassis The slider pressing member is formed of a rib portion continuously provided on the chassis and a plate piece provided in a cantilever manner on the rib portion. The hook portion of the locking mechanism is displaced in a direction intersecting the reciprocating direction of the slider and is engaged with and disengaged from the receiving portion. The resin spring portion of the slider pressing member is elastically contacted with the arc-shaped end surface of the provided projecting piece portion, and the hook portion is pressed in a direction to increase the engagement width between the receiving portion and the hook portion. By adopting the configuration of, it becomes more concrete.

  As described above, according to the present invention, the hook portion of the lock mechanism is inadvertently received only by devising the structure of the slider pressing member described with reference to FIG. 6 without increasing the number of necessary parts. Thus, it is possible to reliably prevent a situation where the disk device is detached from the disk device, and to provide a disk device with stable operation performance.

  FIG. 1 is a schematic plan view of a main part of a disk device according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view of a slider pressing member 67.

  In the disk device of this embodiment, the basic configuration and operation thereof, the configuration and operation of the lock mechanism 80, and the like are the same as those described with reference to FIGS. That is, the disk device can be moved up and down with a slider 60 attached to the chassis 10 forming the frame frame so as to be reciprocally movable, a rack 61 provided in the slider 60, the optical pickup 30 and the turntable 40. A cam mechanism (see FIG. 3) that connects the movable chassis 50 (see FIG. 1) attached to the chassis 10 to the slider 60 and the movable chassis 50 to interlock the up-and-down movement of the movable chassis 50 with the reciprocating movement of the slider 60. And a pinion 62 that is fitted to the chassis 10 and meshes with the rack 61 and rotates forward and backward to move the slider 60 back and forth. In the operation mode of the optical pickup 30, the slider 60 is pushed all the way to the forward limit position. The rack 61 is disengaged from the pinion 62 and the optical pick As the rack 30 is switched from the operation mode to the non-operation mode, the slider 60 is initially moved from the forward movement limit position in the backward movement direction so that the rack 61 is engaged with the pinion 62. FIG. ~ Same as referring to FIG. Further, the lock mechanism 80 is positioned at the forward movement limit position in the operation mode of the optical pickup 30 by engaging the receiving portion 81 provided on the chassis 10 side and the receiving portion 81 provided on the slider 60 side. The hook portion 82 for maintaining the slider 60 at the forward limit position is also provided in the same manner as with reference to FIGS.

  In this embodiment, the newly devised matter is that the hook portion 82 that contacts the slider 60 located at the forward limit position and engages the receiving portion 81 is disengaged from the receiving portion 81. The rib-shaped slider pressing member 67 to be prevented is given elasticity, and the slider pressing member 67 is elastically pressed by the slider 60 so that the hook portion 82 is pressed in the direction in which the engagement width between the receiving portion 81 and the hook portion 82 is increased. It is only a point.

  In this embodiment, the hook portion 82 of the lock mechanism 80 is configured to be displaced in a direction intersecting with the reciprocating direction of the slider 60 so as to be engaged with and disengaged from the receiving portion 81. A rib-shaped slider pressing member 67 is integrally formed with the chassis 10 with resin. Specifically, as shown in FIG. 2, the slider pressing member 67 is composed of a rib portion 68 that is continuously provided up to the chassis 10 and a plate piece that is connected to the rib portion 68 in a cantilever manner. And a resin spring portion 69. As shown in FIG. 1, the resin spring portion 69 of the slider pressing member 67 is formed on the arcuate end surface 65 a of the projecting piece 65 provided in the slider 60 at the contact point between the slide pressing member 67 and the slider 60. It is elastically contacted, and the pressing direction of the hook portion 82 by the resin spring portion 69 is made to coincide with the direction in which the engagement width between the receiving portion 81 and the hook portion 82 is increased.

  If the configuration of the slider pressing member 67 is changed as in the configuration described in FIGS. 1 and 2, the hook engaged with the receiving portion 81 by the elasticity imparted to the rib-shaped slider pressing member 67. Since the portion 82 is constantly repressed in the direction of increasing the engagement width, it is difficult for the hook portion 82 of the lock mechanism 80 to be accidentally detached from the receiving portion 81. Therefore, the unexpected operation of the slider 60 due to the hook unit 82 being accidentally detached from the receiving unit 81 does not occur, the failure due to the unexpected operation of the slider 60 does not occur, and the disk device malfunctions. This can prevent the occurrence of accidents. In addition to this, since the slider pressing member 67 is integrally formed with the chassis 10 with resin, it is not necessary to add an extra part, and the assembling property and the mass productivity of the disk device are shown in FIG. It does not decrease with respect to what has been described.

1 is a schematic plan view of a main part of a disk device according to an embodiment of the present invention. It is a schematic perspective view of a slider pressing member. 1 is a schematic plan view showing a basic configuration of a disk device. (A) is an explanatory view showing the positional relationship between the rack and the slider just before the slider is initially moved in the backward movement direction, and (B) is an explanatory view showing the state of the locking mechanism in the same state. is there. (A) is explanatory drawing which showed the positional relationship of the rack and a slider in the state by which the slider is initially moved to a backward movement direction, (B) is explanatory drawing which showed the state of the locking mechanism in the same state. . It is a top view of the principal part of the conventional disc apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Chassis 30 Optical pick-up 40 Turntable 50 Movable chassis 60 Slider 61 Rack 62 Pinion 65 Projection piece part 65a Arc-shaped end surface 66,67 Slider pressing member 68 Rib part 69 Resin spring part 71 Boss (cam mechanism)
80 Locking mechanism 81 Receiving part 82 Hook part

Claims (4)

A slider that is reciprocally attached to a chassis forming a frame, a rack provided in the slider, a movable chassis that is provided with an optical pickup and a turntable, and is attached to the chassis so as to be movable up and down; A cam mechanism that connects the slider and the movable chassis to link the lifting and lowering movement of the movable chassis with the reciprocating movement of the slider, and a pinion that is mounted on the chassis and meshes with the rack to rotate the slider back and forth. And the slider is pushed all the way to the forward limit position in the operation mode of the optical pickup so that the rack is disengaged from the pinion, and the optical pickup is switched from the operation mode to the non-operation mode. As a result, the slider returns from the forward movement limit position. And initial movement in a direction together with the rack is adapted to mesh with the pinion,
A receiving portion provided on the chassis side, and the slider positioned at the forward movement limit position in the operation mode of the optical pickup by engaging with the receiving portion provided on the slider side. A locking mechanism comprising a hook portion for maintaining the position;
A disk device comprising: a rib-shaped slider pressing member that abuts on the slider positioned at the forward limit position and prevents the hook portion engaged with the receiving portion from being detached from the receiving portion In
The rib-shaped slider pressing member is integrally formed with the chassis with resin, and the slider pressing member is connected to the chassis in a cantilever manner with the rib portion connected to the chassis. In contrast to the resin spring portion formed of a plate piece, the hook portion of the lock mechanism is configured to be displaced in a direction intersecting the reciprocating direction of the slider so as to be engaged with and disengaged from the receiving portion. The resin spring portion of the slider pressing member is brought into elastic contact with the arc-shaped end surface of the projecting piece portion provided in the slider so that the hook portion extends in the direction of increasing the engagement width between the receiving portion and the hook portion. A disk device characterized by being pressed. A slider that is reciprocally attached to a chassis forming a frame, a rack provided in the slider, a movable chassis that is provided with an optical pickup and a turntable, and is attached to the chassis so as to be movable up and down; A cam mechanism that connects the slider and the movable chassis to link the lifting and lowering movement of the movable chassis with the reciprocating movement of the slider, and a pinion that is mounted on the chassis and meshes with the rack to rotate the slider back and forth. And the slider is pushed all the way to the forward limit position in the operation mode of the optical pickup so that the rack is disengaged from the pinion, and the optical pickup is switched from the operation mode to the non-operation mode. As a result, the slider returns from the forward movement limit position. And initial movement in a direction together with the rack is adapted to mesh with the pinion,
A receiving portion provided on the chassis side, and the slider positioned at the forward movement limit position in the operation mode of the optical pickup by engaging with the receiving portion provided on the slider side. A locking mechanism comprising a hook portion for maintaining the position;
A disk device comprising: a rib-shaped slider pressing member that abuts on the slider positioned at the forward limit position and prevents the hook portion engaged with the receiving portion from being detached from the receiving portion In
The rib-shaped slider pressing member is given elasticity, and the slider pressing member is pressed against the slider so that the hook portion is pressed in the direction of increasing the engagement width between the receiving portion and the hook portion. A disk device characterized by the above.   The disk device according to claim 2, wherein the slider pressing member is integrally formed with the chassis from a resin.   4. The disk device according to claim 3, wherein the slider pressing member includes a rib portion provided continuously with the chassis and a resin spring portion formed of a plate piece provided in a cantilever manner on the rib portion. .

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