JP2008299943A - Disc recording and / or playback device - Google Patents

Abstract

A conventional disk recording and / or reproducing apparatus uses a magnetic force of a chucking pulley or a magnetic force of a solenoid to drive a disk cover up and down. The entire apparatus was large (thick) in the vertical direction.
A disk tray having a disk storage portion in which a disk-shaped recording medium D is detachably stored, a tray storage housing for movably supporting the disk tray, and a posture change to a tray storage portion. And a disk cover 14 that covers the entire disk storage unit 11. The disk cover 14 includes an elevating unit 62 that protrudes toward the disk tray 12, and the disk tray 12 includes an elevating unit. The recessed part 17 into which 64 can be taken in and out is provided, and the elevating part 64 is inserted into the recessed part 17 so that the disk storage part 11 is closed by the disk cover 14.
[Selection] Figure 4

Description

  The present invention relates to a disk recording and / or reproducing apparatus in which a disk cover of a disk tray having a disk storage part formed of a recess for storing a disk-shaped recording medium is covered with a disk cover.

  As a conventional disk recording and / or reproducing apparatus of this type, there is one described in Patent Document 1, for example. Patent Document 1 describes an optical disk drive device that suppresses dust from adhering to an optical disk recording medium and an optical pickup as much as possible. The optical disk drive device described in this patent document 1 describes that “the optical disk recording medium is detachably mounted on the upper surface, and the front surface of the housing and the interior of the housing are placed horizontally through the front opening of the housing. In a tray loading type optical disk drive device having a disk tray that is slidably drawn and slidable in the direction, the optical disk recording medium is moved from the upper surface to the side surface when the disk tray is in the housing. And a cover that covers the disc tray in a lid shape and a drive mechanism that presses and urges the cover toward the disc tray from above ”.

According to the optical disc drive apparatus having such a configuration, an effect such as “advantage of greatly reducing dust adhesion to the optical disc recording medium and the optical pickup while adopting the loading tray method” is expected. .
JP-A-9-17082

  However, in the optical disk drive device described in Patent Document 1, a chucking pulley for pivotally supporting the disk is provided above the cover, and the cover is driven up and down by the magnetic force of the chucking pulley and the magnetic force of the solenoid. Therefore, there are problems that the number of parts increases due to the chucking pulley and the solenoid, and that the disk drive device itself becomes larger (thick) in the vertical direction.

  Also, when the disc is covered with a cover, a gap is required between the chucking pulley and the cover to avoid interference between the chucking pulley that rotates and the cover, and the optical disc must be completely sealed. I could not. Therefore, there is a problem that the air flow generated when the disk is driven to rotate moves through the gap between the chucking pulley and the cover, and the noise level due to the air flow increases.

  The problem to be solved is that in the conventional disk recording and / or reproducing apparatus, a chucking pulley for pivotally supporting the disk is provided above the cover, and the cover is driven up and down by the magnetic force of the chucking pulley and the magnetic force of the solenoid. Therefore, the number of parts is increased by the chucking pulley and the solenoid, and the entire apparatus becomes larger (thick) in the vertical direction.

  Further, when the disk is covered with the disk cover, a gap is required between the chucking pulley and the disk cover in order to avoid interference between the chucking pulley that is rotationally driven and the disk cover. For this reason, the air flow generated when the disk is driven to rotate moves through the gap between the chucking pulley and the disk cover, and the noise level due to the air flow increases.

  The disc recording and / or reproducing apparatus according to the present invention has a disc tray having a disc storage portion including a concave portion in which a disc-shaped recording medium is detachably stored, and the disc tray can be moved in the surface direction of the disc tray. A tray storage case that supports the disc storage unit, and a disc cover that is attached to the tray storage unit of the tray storage case so that the posture can be changed and covers the entire disk storage unit of the disc tray stored in the tray storage unit. Yes. The disc cover is provided with an elevating portion that protrudes toward the disc tray of the disc cover, and the disc tray is provided with a recess that allows the elevating portion to be taken in and out, when the disc tray is stored in the tray storage portion. The most important feature is that the elevating part is inserted into the recess and the disk storage part is closed by the disk cover.

  According to the disc recording and / or reproducing apparatus of the present invention, the posture of the disc cover is changed by the elevating part provided on the disc cover and the recess provided on the disc tray. Therefore, the attitude of the disc cover can be changed without using a chucking pulley or solenoid, the number of parts can be reduced, and the overall apparatus can be made thinner and smaller. Further, the entire surface of the disc storage portion of the disc tray is covered with a disc cover when the disc tray is stored in the tray storage portion. Therefore, the flow of air generated when the disk-shaped recording medium is driven to rotate is prevented or suppressed from leaking to the outside of the disk cover, and the increase in the noise level due to the flow of air through the gap is prevented. It is possible to reduce the noise level generated by the rotation.

  The entire disc storage portion of the disc tray is covered with the disc cover, and an elevating portion for lifting the disc cover and a recess in which the elevating portion can be taken in and out are provided. As a result, the disk recording and / or reproducing apparatus can reduce the number of parts and reduce not only the thickness and size of the entire apparatus but also the noise level generated by the rotation of the disk-shaped recording medium. Was realized with a simple configuration.

  1 to 16 show examples of embodiments of the present invention. 1 to 16 show a first embodiment of the disk recording and / or reproducing apparatus of the present invention. FIG. 1 is a perspective view of a notebook personal computer (notebook personal computer), and FIG. 2 is a disk. FIG. 3 is an exploded perspective view of the top cover, FIG. 4 is an exploded perspective view of the disk drive device, FIG. 5 is a perspective view of the movable rail and the fixed rail further exploded from FIG. FIG. 7 is a perspective view of a drive unit according to the disk drive device, and FIG. 7 is a plan view of the drive unit.

  8 is an explanatory view showing the main parts of the disk tray and the disk cover, FIG. 9 is a sectional view of the disk drive device, FIGS. 10A and 10B are enlarged explanatory views of the main part of FIG. 9, and FIG. FIG. 12 is an explanatory view showing a first embodiment of the elastic member attached to the disc cover, FIG. 13 is an explanatory view showing a second embodiment of the elastic member, and FIG. FIG. 15A and FIG. 15B are explanatory diagrams of the state in which the disc tray is stored in the tray storage housing, and FIG. 16 is a diagram of the disc tray and the disc cover. It is explanatory drawing of the gap | interval produced between them.

  First, a notebook personal computer (hereinafter referred to as “notebook personal computer”) shown as a first embodiment of the disk recording and / or reproducing apparatus of the present invention will be described with reference to FIG. The notebook computer 1 includes a housing 2 that forms a flat rectangular parallelepiped, a lid 3 that also forms a flat rectangular parallelepiped, and the like. The housing 2 and the lid 3 are each provided with a space portion having a predetermined size, and are configured to overlap each other so as to be laminated. That is, the lid 3 is laminated on the casing 2, and the casing 2 and the lid 3 are connected to each other by the hinge mechanism 4 so as to be rotatable.

  The hinge mechanism 4 extends in the left-right direction at a pair of case-side hinges 4 a, 4 a provided so as to extend in the left-right direction on both sides on the upper rear side of the upper surface of the case 2, and The lid side hinge part 4b provided so as to be sandwiched between the pair of casing side hinge parts 4a, 4a, and the pair of casing side hinge parts 4a, 4a and the lid side hinge part 4b opposed on the same axis. It consists of a combination with the hinge shaft 4c. A casing 2 and a lid 3 are connected to each other by the hinge mechanism 4 so as to be rotatable, and a notebook personal computer 1 is configured in which the lid 3 is rotatable in the vertical direction with respect to the casing 2. The lid 3 is configured so as to be able to hold the inclined posture with respect to the housing 2 at an arbitrary angular position.

  As shown in FIG. 1, an opening 5 is provided on the surface facing the upper surface of the housing 2, which is the inner surface of the lid 3, leaving a slight edging around the periphery. The opening 5 of the lid 3 faces a flat display panel 6 such as a liquid crystal display, an organic EL display, or a surface electric field display which is a display device housed therein. Inside the flat display panel 6, although not shown, a backlight that shines light on the back side of the flat display panel 6, a wiring board on which a control device that controls the screen of the flat display panel 6 is mounted is necessary. Are stored. Various types of information, images, and the like can be displayed on the flat display panel 6.

  Further, on the surface facing the opening 5 of the lid 3, which is the upper surface of the housing 2, a touch for performing an input operation including a key type input unit 7 having a large number of keys and a touch panel type input means. An expression input unit 8 is provided. Control signals are input from these input units 7 and 8, and predetermined information processing or the like is performed. Inside the housing 2, a disk drive device 10 described below, a wiring board (not shown) on which a control device for controlling the disk drive device 10 and other devices, devices, etc. are mounted, a disk drive device 10 and A battery power source (not shown) for supplying power to the control device or the like is accommodated.

  The notebook computer 1 includes a disk drive device 10 that is housed in a drive housing portion 9 provided on the side surface of the housing 2. The disk drive device 10 rotates and drives a disk-shaped recording medium, and records (writes) and reproduces (reads) information signals with respect to the information recording unit. The disk drive device 10 has a configuration as shown in FIGS. That is, as shown in FIG. 4, the disk drive device 10 includes a disk tray 12 having a disk storage portion 11 in which an optical disk D showing a specific example of a disk-shaped recording medium is stored in a removable manner, and the disk tray 12 A tray housing case 13 that is movably supported and a disk cover 14 that is rotatably attached to the tray housing case 13 are provided.

  The drive storage unit 9 has an opening opened on one side surface of the housing 2, and the disk drive device 10 is attached to the drive storage unit 9 and attached to the housing 2 so as to close the opening. It has been. As a disk-shaped recording medium used in the disk drive device 10, not only the optical disk D described in this embodiment, but also various recording disks such as a magneto-optical disk and a magnetic disk are used. Can be applied.

  Further, optical discs such as CDs, CD-ROMs, and DVD-ROMs for reproduction only, as well as CD-RWs, DVD-Rs, DVD-RWs, etc. that can be recorded once or repeatedly can be recorded. Various optical discs can be applied such as the above optical discs. Corresponding to these, as the disk recording and / or reproducing apparatus, for example, an optical disk type recording apparatus, an optical disk type reproducing apparatus, an optical disk type recording / reproducing apparatus, an optical disk type imaging apparatus, a magneto-optical disk type recording apparatus, a magneto-optical disk type Examples include a reproducing device, a magneto-optical disk imaging device, a magnetic disk recording device, a magnetic disk reproducing device, and a magnetic disk recording / reproducing device.

  The size of the optical disk or the like used in the disk drive device 10 is described in this embodiment as an example using a disk-shaped recording medium having a diameter of 12 cm, but is limited to this size. Of course, the present invention can be applied not only to disc-shaped recording media having a diameter of 8 cm but also to disc-shaped recording media of other sizes. Further, the disc-shaped recording medium can be configured to be compatible with a plurality of types of discs having different diameters, for example, an optical disc having a diameter of 12 cm and an optical disc having a diameter of 8 cm.

  The disc tray 12 of the disc drive apparatus 10 is made of a flat plate-like member having a space portion that can move the drive unit 20 within a predetermined range. On the upper surface forming the main surface of the disk tray 12, there is provided a disk storage portion 11 for mounting and storing the optical disk D in a horizontal state. The disk storage portion 11 is formed of a circular recess, and substantially the entire outer peripheral edge thereof is surrounded by the side wall 16. A portion from one corner of the rear side, which is the other side of the first direction X, which is the tray moving direction of the disc tray 12, to the side surface is cut out in an arc shape so that the side wall 16 is exposed. Yes. As a result, at the three locations outside the disc storage portion 11 of the disc tray 12, corners with a pointed tip at 90 ° are formed. A front plate 18 is integrally provided at the base end portion on one side of the tray moving direction X of the disc tray 12.

  A front plate 18 is integrally provided on one side of the first direction X, which is the front surface of the disc tray 12. The front plate 18 closes the opening of the drive storage unit 9 and has a size and shape commensurate with the opening. That is, the front plate 18 is made of a long plate-like member capable of closing the opening of the drive storage portion 9, and the plane direction of the front plate 18 is directed to a direction perpendicular to the main surface of the disc tray 12. It is fixed to the front. The front plate 18 is provided with an eject button 19 for automatically ejecting the disc tray 12 from the tray housing 13.

  The eject button 19 is an operation (operation start) means for a tray discharge mechanism (not shown). The tray discharge mechanism can be configured using, for example, an electromagnetic solenoid having an electromagnet. The electromagnetic solenoid includes, for example, a movable iron core fixed to the disk tray 12, a fixed iron core fixed to the tray housing case 13, a coil attached to the fixed iron core, a return spring of the movable iron core, and the like. The Then, the movable iron core is attracted to the fixed iron core by the magnetic action of the current flowing through the coil, the disk tray 12 is held in the first position stored in the tray housing case 13, and the spring force of the return spring is cut by cutting the current. Then, the movable iron core is moved away from the fixed iron core, and the disk tray 12 is moved to the second position where it jumps out of the tray housing case 13. An eject button 19 can be used as a switch means for cutting off the current.

  Furthermore, the tray transport mechanism is not limited to this embodiment, and it is needless to say that other moving mechanisms can be used. For example, it can also be configured by a coil spring and its locking member. Specifically, a coil spring is disposed between the disk tray 12 and the tray chassis 51, and the coil spring is locked by a lock member. That is, the disk tray 12 is stored in the tray housing 51 with the coil spring compressed, and the compression state of the coil spring is secured by the lock member. Then, by operating the eject button 25 to release the lock of the coil spring by the lock member, the disc tray 12 is moved by the spring force of the coil spring, and the disc tray 12 is projected from the opening by a predetermined amount.

  Further, the disc storage portion 11 of the disc tray 12 is provided with an opening hole 21 into which the drive unit 20 is fitted. The opening hole 21 is formed as an opening having a substantially similar shape slightly larger than that corresponding to the planar shape of the drive unit 20, and the drive unit 20 fixed to a base member (not shown) is fitted into the opening hole 21. The base member is screwed to the lower surface of the disc tray 12, and the upper surface of the drive unit 20 placed on the base member is set to be substantially the same height as the placement surface of the disc storage portion 11.

  A pair of recesses 17 are provided at both front corners on one side of the disc moving direction X of the disc tray 12. The pair of recesses 17, 17 are disposed on both sides of the second direction Y that intersects the first direction X. The two recesses 17 and 17 are provided to control the attitude (tilt) of the disc cover 14, and the cross-sectional shape in the first direction X is recessed in a substantially V shape, and the front-falling slope Has a surface.

  Further, a finger hooking concave portion 22 for finger hooking that communicates with the disk storage portion 11 is provided at one front corner portion of the disk tray 12. The finger hooking recess 22 is for hooking the tip of a finger on the outer peripheral edge of the optical disk D mounted on the drive unit 20 and hooking the optical disk D. The side wall 16 of the disk storage portion 11 is cut out only in the finger-hanging concave portion 22.

  As the material of the disk tray 12 and the front plate 18, for example, engineer plastic such as ABS (acrylonitrile / butadiene / styrene resin) is suitable, but metal such as aluminum alloy can also be used.

  The drive unit 20 mounted on the disc tray 12 has a configuration as shown in FIGS. That is, the drive unit 20 includes a base frame member 24 elastically supported by a base member via a mount insulator (not shown), a disk rotation drive mechanism 25 attached to the base frame member 24, an optical pickup 26, a pickup A moving mechanism 27 and the like are provided.

  The disk rotation drive mechanism 25 of the drive unit 20 has a turntable 28 serving as a disk mounting portion, and the optical disk D is mounted on the turntable 28. By rotating the turntable 28 of the disk rotation drive mechanism 25, the optical disk is rotated at a predetermined speed (for example, a constant linear speed). The optical pickup 26 irradiates a light beam onto the information recording surface of the optical disk mounted on the turntable 28 and is driven to rotate, and writes new information or reads reflected light of the irradiated light beam. Thus, information recorded in advance on the information recording surface is read out.

  The pickup moving mechanism 27 moves the optical pickup 26 radially outward along the information recording surface of the optical disk D that is mounted on the turntable 28 and is driven to rotate. During the movement outward in the radial direction, an information signal recording and / or reproducing operation is performed by the optical pickup 26. The base frame member 24 is mounted with the disk rotation driving mechanism 25, the optical pickup 26, and the pickup moving mechanism 27. A disk rotation drive mechanism 25 and the like are attached to the disk tray 12 via the base frame member 24 and the base member.

  The base frame member 24 is formed by punching a sheet metal into a predetermined shape and bending the periphery slightly downward. As shown in FIG. 7, the base frame member 24 has a planar shape in which a large chamfered portion is provided at four corners of a rectangle and a large opening 31 is provided on the inner side to form a horizontally long substantially octagon as a whole. It is formed as. The opening 31 has a pickup opening 31 a that exposes the upper portion of the optical pickup 26 and a table opening 31 b that faces the turntable 28 of the disk rotation drive mechanism 25 upward. The pickup opening 31a is formed in a substantially rectangular shape so as to expose the entire upper portion of the optical pickup 26, and a table opening 31b having a substantially semicircular shape is disposed on one side in the longitudinal direction.

  A table rotation drive mechanism 15 is disposed in the table opening 31 b of the opening 31. As shown in FIG. 7, the table rotation drive mechanism 15 includes a spindle motor 29 having a turntable 28 on which an optical disk is detachably mounted, and a support plate 32 that fixes the spindle motor 29 and supports it on a base frame member 24. have. The turntable 28 is mounted integrally with a rotating portion of the spindle motor 29 and is rotatably supported by a fixed portion fixed to the support plate 32. A support plate 32 that supports the spindle motor 29 is screwed to the lower surface of the base frame member 24 so that the mounting portion 28b of the turntable 28 protrudes slightly upward from the table opening 31b of the base frame member 24. Has been attached.

  The turntable 28 has a fitting portion 28a formed of a cylindrical convex portion that is fitted in the center hole of the optical disc, and a placement portion 28b on which the peripheral portion of the center hole of the optical disc is placed. The fitting portion 28a and the placement portion 28b are integrally formed, and a ring-shaped cushion material 33 that softens the contact with the optical disc is attached to the placement portion 28b. A plurality (three in this embodiment) of locking claws 34 that are engaged with the center hole of the optical disk are arranged at equal intervals in the circumferential direction in the fitting portion 28a. Each latching claw 34 is urged by an elastic member such as a coil spring (not shown), and each distal end protrudes radially outward from the outer peripheral surface of the fitting portion 28a. These locking claws 34 form a chucking mechanism, and the optical disk is held on the turntable 28 by engaging all the locking claws 34 with the center holes.

  An optical pickup 26 is configured to be able to approach and separate from the disk rotation drive mechanism 25 within a predetermined range. The optical pickup 26 includes a semiconductor laser that is a light source that emits a light beam, and a photodetector that includes a light receiving element that receives a returning light beam. The optical pickup 26 emits a light beam from a semiconductor laser, condenses the light beam by an objective lens 36 and irradiates the information recording surface of the optical disc, and also returns a return light beam reflected by the information recording surface. Light is received by a photodetector. Thereby, the information signal can be written to or read from the information recording surface of the optical disc.

  The optical pickup 26 also includes a biaxial actuator that drives the objective lens 36 in the direction of the optical axis (hereinafter referred to as “focusing direction”) and the direction orthogonal to the recording track of the optical disc (hereinafter referred to as “tracking direction”). Objective lens drive mechanism. This objective lens driving mechanism focuses the objective lens 36 on the information recording surface while displacing the objective lens 36 in the focusing direction and tracking direction based on the detection signal from the optical disc detected by the photodetector. Thereby, drive control such as a focus servo for focusing the objective lens 36 on the information recording surface and a tracking servo for causing the spot of the light beam condensed by the objective lens 36 to follow the recording track is executed. The optical pickup 26 is mounted on the base frame member 24 via a pickup moving mechanism 27, and can be moved toward and away from the turntable 28 within a predetermined range.

  The pickup moving mechanism 27 has a pickup base 37, a pair of guide shafts 38 and 39, a feed screw shaft 41, and a drive motor 42. The pickup base 37 is formed of a flat block-shaped member that accommodates a biaxial actuator, a photodetector, and the like, and is movably supported by a pair of guide shafts 38 and 39. The pair of guide shafts 38 and 39 are arranged on one side of the turntable 28 on the lower surface of the base frame member 24 so as to be substantially parallel to each other with a predetermined interval. The pair of guide shafts 38 and 39 are supported at both ends by bearing portions at four locations of the base frame member 24. Each bearing portion is composed of a bearing piece provided on the base frame member 24 and a holding plate which is a separate member, and the pair of guide shafts 38 and 39 are attached to the base piece by screwing the holding plate and clamping between the bearing pieces. It is fastened and fixed to the frame member 24.

  The pickup base 37 has a first bearing portion 43 and a second bearing portion 44 that protrude outward on both sides orthogonal to the axial direction of the pair of guide shafts 38 and 39. The first bearing portion 43 includes a front bearing portion 58a and a rear bearing portion 58b having bearing holes through which the first guide shaft 38 is slidably inserted. The front and rear bearing portions 43 a and 43 b are arranged on the same plane with a predetermined interval in the axial direction of the first guide shaft 38. A rack member 45 having an engaging portion that engages with the thread groove of the feed screw shaft 41 is disposed between the front and rear bearing portions 43a and 43b. The rack member 45 is screwed to the pickup base 37 by a fixing screw 46.

  The second bearing portion 44 is provided with a guide groove that opens laterally. The second guide shaft 55 is slidably inserted into the guide groove. The pickup base 37 is slidable by the second guide shaft 55 penetrating the second bearing portion 44 and the first guide shaft 38 penetrating the bearing portions 43a and 43b before and after the first bearing portion 43. It is supported. The feed screw shaft 41 is disposed substantially in parallel with the first guide shaft 38 with a predetermined interval. The feed screw shaft 41 is a rotating shaft of the drive motor 42, and the drive motor 42 is fixed to the base frame member 24 by a mounting bracket (not shown). Moreover, the front end side of the feed screw shaft 41 is rotatably supported by the mounting bracket. The mounting bracket is screwed to the base frame member 24, whereby the feed screw shaft 41 and the drive motor 42 are attached to the base frame member 24.

  One end of a flexible wiring board (not shown) is connected to the pickup base 37. This flexible wiring board electrically connects the optical pickup 26 held by the base frame member 24 to a power supply side connector (not shown) outside the disk drive device 10, and has a high flexibility. It is a wiring member. The flexible wiring board has a first connection portion attached to the pickup base 37 and a second connection portion connected to the power supply side connector. A wiring circuit group having a number of wiring circuits is formed on the flexible wiring board, and each wiring circuit is continuous from the first connecting portion to the second connecting portion.

  As shown in FIG. 6, a base cover 47 is attached to the upper surface of the base frame member 24. The base cover 47 has a shape substantially corresponding to the planar shape of the base frame member 24. The base cover 47 is provided with an opening 48 for exposing the turntable 28 and the objective lens 36 of the optical pickup 26. The opening 48 extends in the moving direction of the optical pickup 26 and is formed as a long hole that continues from the position farthest away from the turntable 28 to the table opening 31b where the turntable 28 is exposed. Has been. The base cover 47 is fastened and fixed to the upper surface of the base frame member 24 by a plurality (six in this embodiment) of fixing screws 49.

  The drive unit 20 having such a configuration is fixed to the base member at three positions via dampers. For this reason, the base frame member 24 is provided with three leg pieces 24a, and a damper is attached to the neck portion of each leg piece 24a. By fixing the drive unit 20 to the base member via the damper in this way, it is possible to make a structure in which disturbances such as vibration and impact are not easily transmitted to the optical pickup 26 and the like.

  The tray housing case 13 in which the disk tray 12 is taken in and out is a hollow flat case having an open front. As shown in FIG. 5, the tray housing case 13 includes a tray chassis 51 opened to the upper surface and the front surface, and a top cover 52 opened to the lower surface and the front surface. A top cover 52 is overlaid on the tray chassis 51, thereby forming a tray storage portion 60 that is open only on the front surface. As shown in FIG. 2, the top cover 52 is fastened and fixed to the tray chassis 51 by the plurality of fixing screws 53 in this overlapped state, thereby constituting the tray housing case 13. The disc tray 12 is taken in and out from the opening of the tray storage unit 60 opened on the front surface of the tray storage housing 13.

  As shown in FIG. 5, a step 51b having an appropriate height is provided on one side of the lower surface 51a of the tray chassis 51 in the second direction Y, and is continuously outward from the upper end of the step 51b. A protruding collar 51c is provided. The flange 51c is provided to accommodate an overhanging portion (a portion indicated by cross-hatching in FIG. 5) 12a that is projected in an arc shape by forming the disc storage portion 11 of the disc tray 12 into a complete circle. It is.

  A control board 54 on which a necessary microcomputer (MPU), semiconductor integrated circuit (IC), capacitor and other electronic components are mounted on a predetermined circuit board is mounted on the lower surface 51a of the tray chassis 51. Yes. One side of the flexible wiring board (not shown) is electrically connected to the control board 54, and the other side is mechanically and electrically connected to the connector of the drive unit 20. Further, a connector 55 for electrically connecting to an external electronic device is mounted on the control board 54.

  A pair of fixed rails 56 </ b> L and 56 </ b> R are fixed to the lower surface portion 51 a of the tray chassis 51. A first movable rail 57L is supported on the first fixed rail 56L so as to be movable along its longitudinal direction. The second movable rail 57R is supported by the second fixed rail 56R so as to be movable along the longitudinal direction.

  As shown in FIGS. 4 and 9, the pair of fixed rails 56 </ b> L and 56 </ b> R have their longitudinal directions oriented in the first direction X at the corners in the second direction Y of the lower surface portion 51 a of the tray chassis 51. Arranged in a state. Of the pair of fixed rails 56L and 56R, the first fixed rail 56L has a U-shaped cross section. As shown in FIG. 10B and the like, the height of the first fixed rail 56 </ b> L is set to be substantially the same as the stepped portion 51 b of the tray chassis 51. The first fixed rail 56L is fixed to the lower surface portion 51a with the opening side facing inward so as to face the second fixed rail 56R.

  The second fixed rail 56R includes a portion having a U-shaped cross section, an inner flange portion 56a bent inward at one end, and an outer flange bent outward in the other end. A portion 56b is provided. As shown in FIG. 10A and the like, the height of the outer flange portion 56b of the second fixed rail 56R is set to be slightly lower than the height of the side wall of the tray chassis 51, and is set to enter the height. ing. The second fixed rail 56R is fixed to the lower surface portion 51a with the opening side of the U-shaped portion facing inward so as to face the first fixed rail 56L.

  The first movable rail 57L is slidably inserted into the U-shaped recess of the first fixed rail 56L. The second movable rail 57R is slidably inserted into the U-shaped recess of the second fixed rail 56R. Both the first movable rail 57L and the second movable rail 57R have a U-shaped cross section, and have an inner flange portion 57a at one end thereof. A first rail coupling portion 58L provided on the lower surface of the disk tray 12 is slidably engaged in a U-shaped concave portion of the first movable rail 57L. A second rail coupling portion 58R provided on the lower surface of the disk tray 12 is slidably engaged in a U-shaped concave portion of the second movable rail 57R.

  The first rail coupling portion 58L is disposed on one side in the second direction Y on the lower surface of the disk tray 12. The second rail coupling portion 58R is disposed on the other side in the second direction Y on the lower surface of the disk tray 12. The first rail coupling portion 58L and the second rail coupling portion 58R are provided on the lower surface of the disk tray 12 so as to be substantially parallel to each other with a predetermined interval. The first rail coupling portion 58L and the second rail coupling portion 58R are movable in the longitudinal direction in the respective concave portions of the first movable rail 57L and the second movable rail 57R.

  The state in which the two movable rails 57L and 57R are completely stored in the two fixed rails 56L and 56R and positioned in the tray storage unit 60 is the disk tray 12 positioned in the tray storage unit 60 of the tray storage housing 13. The tray is stored (first position). In this state, the optical disk D can be chucked and released from the drive unit 20. The information signal can be recorded on and reproduced from the optical disk D by the drive unit 20.

  On the other hand, the state in which the two movable rails 57L and 57R protrude most from the two fixed rails 56L and 56R is the state in which the disk tray 12 protrudes from the tray housing case 13 and moves to the disk discharge position (second position). is there. At this disc discharge position, the optical disc D can be taken out from the disc storage portion 11 of the disc tray 12, and the optical disc D can be stored in the disc storage portion 11.

  As shown in FIG. 3, the disc cover 14 is attached so as to be superposed on the tray chassis 51 so that the posture can be changed. The disc cover 14 is disposed so as to close the opening on the upper surface of the tray chassis 51. The disc cover 14 is supported by a pair of pivots 61, 61 provided on the tray chassis 51 so as to be rotatable in the vertical direction. The pair of pivots 61, 61 are provided so as to protrude laterally at the rear portion of the tray chassis 51, and the disc cover 14 is predetermined with respect to the tray chassis 51 around the pair of pivots 61, 61. Within the angle range, it can swing in the vertical direction.

  The disc cover 14 has a thin flat plate shape and has appropriate elasticity. The disc cover 14 is formed, for example, by pressing a sheet metal. As shown in FIG. 3, the disc cover 14 has a shape and a size that can cover the entire top surface of the disc tray 12. The thickness of the disk cover 14 is preferably 0.5 mm or less in view of thinning and downsizing of the entire apparatus, and 0.2 mm to 0.4 mm is most preferable in consideration of springiness and strength. Moreover, as a material of the disk cover 14, stainless steel, spring steel, etc. which have spring property are suitable.

  In this embodiment, the disk cover 14 is formed by pressing a sheet metal. However, the present invention is not limited to this. For example, it may be formed by molding engineering plastics or the like.

  The disc cover 14 is provided with a substantially circular central bulging portion 14 a having a size corresponding to the disc storage portion 11 and the finger hanging recess 22 of the disc tray 12. A small-diameter escape bulge 14e that bulges upward is provided in the approximate center of the central bulge 14a. The escape bulging portion 14e is provided to avoid contact with the fitting portion 28a of the turntable 28. The optical disk D is accommodated inside the central bulging portion 14a. An annular contact portion 63 continuous in the circumferential direction is provided on the peripheral edge of the central bulging portion 14a. The annular contact portion 63 is in contact with the upper surface of the disc tray 12 and closes the disc storage portion 11 with the disc cover 14 to prevent dust and the like from entering the disc storage portion 11.

  Further, on the outer side of the annular contact portion 63 of the disc cover 14, there are provided three corner portions 14b, 14c, 14d arranged so as to protrude in three directions from the central bulge portion 14a. The three corner portions 14b, 14c, and 14d are arranged in the first front corner portion 14b and the second front corner portion 14c that are disposed on both sides of the front side of the disc cover 14 in the first direction X, and the rear in the first direction X. It consists of a rear corner portion 14d arranged on one side. As a result, the rear corner portion 14d and the second front corner portion 14c are arranged in a diagonal direction across the central bulging portion 14a. A chamfered cutout is opposed to the diagonal direction of the first front corner portion 14b.

  The three corners 14b, 14c, 14d of the disc cover 14 are provided with elevating elastic pieces 64A, 64B, 64C that form leaf springs, respectively. The three elevating elastic pieces 64A, 64B, and 64C each have a long shape with a slit extending in the first direction X at a position where a predetermined width is opened from the side edge at each corner 14b, 14c, and 14d. It is formed by forming a piece and bending the long piece into a U-shape to give elasticity. The bent sides of the bent portions of the three elevating elastic pieces 64A, 64B, and 64C protrude so as to protrude toward the disc tray 12 (opposite to the protruding direction of the central bulging portion 14a) from the surface of the annular contact portion 63. Is formed. Due to the elastic deformation of the elevating elastic pieces 64A, 64B, and 64C, as will be described later, the annular contact portion 63 is pressed against the periphery of the disc storage portion 11 of the disc tray 12, and the disc storage portion 11 is covered with the disc cover 14 so that the dust is covered. Etc. are prevented or suppressed.

  Further, two elevating elastic pieces 64A and 64B showing one specific example of the elevating part of the present invention provided in the first front corner part 14b and the second front corner part 14c are provided in two disk trays 12 respectively. The recesses 17 and 17 are configured to be able to be taken in and out. In addition, although the example which comprised the raising / lowering part as a substantially V-shaped raising / lowering elastic piece was demonstrated in the present Example, it is not limited to this. For example, the elevating part may be a convex part protruding in a semicircular shape from the contact surface 14b to the one surface side, and the shape of the concave part of the disk tray 12 may be formed in a semicircular shape corresponding to the shape of the elevating part. Further, in the present embodiment, the example in which the elevating parts are provided on both sides in the second direction Y on the opening side of the tray chassis 51 in the disk cover 14 is not limited to this. You may provide a raising / lowering part only in one side of the both sides of the direction Y.

  Furthermore, leaf springs 65A, 65B, and 65C showing a specific example of an elastic member are provided at the three corner portions 14b, 14c, and 14d of the disc cover 14. The leaf springs 65A, 65B, and 65C are provided for crimping the annular contact portion 63 to the peripheral edge of the disc storage portion 11 of the disc cover 14, and have a configuration as shown in FIGS. . The plate springs 65A, 65B, 65C are a belt-like fixed piece 66a fixed to the disc cover 14 and elastic rising pieces 66b, 66b formed so as to be continuous on both sides in the width direction of the fixed piece 66a. It is made up of. The fixing piece 66a is fixed to the disc cover 14 by crimping.

  That is, the leaf springs 65A, 65B, and 65C are formed so as to protrude to both sides in the width direction on both sides of the fixed piece 66a that is bent in the shape of a halfway in the longitudinal direction and the bent portion of the fixed piece 66a. It consists of four raised pieces 66b having elasticity. The four rising pieces 66b are inclined and inclined at an appropriate angle, thereby imparting elasticity to each rising piece 66b. Clamping holes 66c are provided at a plurality of locations (two locations in this embodiment) of the fixing piece 66a, and burring shaft portions 67 provided on the disc cover 14 are fitted into the crimping holes 66c, respectively. The plate springs 65A, 65B, and 65C are fixed to the three corners 14b, 14c, and 14d of the disc cover 14, respectively, by crimping the tip of the burring shaft portion 67.

  Further, on both sides of the disc cover 14 in the second direction Y, in the vicinity of the third corner portion 14d and the portion without the corner, a bearing piece 68 (only the right side is protruded on the opposite side to the central bulge portion 14a). Are shown). Each of the bearing pieces 68 is provided with a bearing hole, and the pair of pivots 61 provided in the tray chassis 51 are rotatably fitted in the bearing holes. Thereby, the disc cover 14 is supported by the tray chassis 51 so as to be swingable in the first direction X about the pair of pivots 61 as the rotation center.

  The top cover 51 that covers the upper side of the disk cover 14 has a shape and a size corresponding to the planar shape of the tray chassis 51. Then, as shown in FIGS. 3 and 9, it can be superimposed on the tray chassis 51. The top cover 52 includes an upper surface portion 52 a that covers the upper surface of the tray chassis 51, left and right side surface portions 52 b and 52 c that cover a part of the side surface of the tray chassis 51, and a back surface portion 52 d that covers a part of the back surface of the tray chassis 51. have. The upper surface portion 52a is provided with insertion holes (four locations in this embodiment) 69 for screwing the top cover 52 to the tray chassis 51. Corresponding to these insertion holes 69, screw holes are respectively provided at corresponding positions (four locations) of the tray chassis 51. A fixing screw 53 is screwed into each of the insertion hole 69 and the screw hole, and the disk drive device 10 is assembled as shown in FIG.

  The disk drive device 10 having such a configuration can be easily assembled as follows, for example. First, the drive unit 20, the front plate 18, the ejection mechanism, and the left and right movable rails 57L and 57R are assembled on the disc tray 12. Separately, the left and right fixed rails 56L and 56R are assembled to the tray chassis 51 as shown in FIG. At this time, the control board 54 is mounted on the tray chassis 51 in advance. The assembly state so far is shown in FIG.

  Next, the pair of movable rails 57L and 57R are assembled into a pair of fixed rails 56L and 56R, and the disc tray 12 is supported on the tray housing case 13 so as to be movable. Next, the disc cover 14 is assembled to the tray chassis 51. Finally, as shown in FIG. 3, the top cover 52 is overlaid on the disk cover 14. Then, the top cover 52 is screwed to the tray chassis 51 with a plurality of fixing screws 53. As a result, as shown in FIG. 2, the assembly operation of the disk drive device 10 in which the thickness of the entire device is extremely reduced is completed.

  The disk drive device 10 assembled in this way is attached to the drive storage portion 9 of the housing 2 as shown in FIG. Thereby, the notebook personal computer 1 provided with the disk drive device 10 is manufactured. The disk drive device 10 assembled in the notebook computer 1 is used as follows, for example.

  When the disk drive device 10 is used, first, the eject button 19 is pressed to eject the disk tray 12 by a predetermined amount. When the disc tray 12 protrudes by a predetermined amount, most of the disc storage portion 11 is exposed. Therefore, the optical disk D is mounted on the turntable 28 disposed at the center of the disk storage unit 11. Since the turntable 28 is of a self-chucking type, the optical disk D is reliably chucked only by being mounted on the turntable 28. Therefore, there is no need to provide a chucking pulley or the like as in the prior art. When the optical disk D is taken out from the turntable 28, since the finger hanging recess 22 is provided in a part of the side wall 16, it is attached by inserting the fingertip into the finger hanging recess 22 and hooking the outer peripheral edge of the optical disc D. The used optical disk D can be easily taken out.

  Next, the disc tray 12 is slightly pressed to operate a tray moving mechanism (not shown). As a result, the disk tray 12 is pulled into the tray housing case 13 through the operation of the tray moving mechanism. Then, the disc tray 12 is positioned at a predetermined position of the tray storage unit 60 of the tray storage housing 13.

  At this time, as shown in FIG. 14, in a state before the disc tray 12 enters the tray storage unit 60 (second position), the disc cover 14 is held in the tray storage housing 13 in a substantially horizontal state. . Therefore, a part (central bent portion) of the left and right elastic elastic pieces 64A and 64B provided on the left and right sides of the front side in the first direction X of the disc tray 14 is on the movement trajectory of the front end portion 71 of the disc tray 12. It is in a protruding state.

  Further, the disc tray 12 moves in the first direction X. When entering the tray storage unit 60, the leading end 71 of the disc tray 12 comes into contact with the central bent portions of the left and right elevating elastic pieces 64A and 64B of the disc cover 14, and is elastically deformed and pushed upward. As a result, as shown in FIG. 15A, the disc cover 14 is rotated counterclockwise (a direction away from the disc storage portion 11 of the disc tray 12) about the pair of pivots 61 as the center of rotation. The side is lifted. Therefore, the pull-in part 72 formed between the left and right elastic elastic pieces 64 </ b> A and 64 </ b> B is lifted higher than the upper surface of the disk tray 12. Therefore, the drawing-in part 72 does not rub the upper surface of the disc tray 12, and the smooth movement of the disc tray 12 can be ensured.

  When the disc tray 12 further enters and moves to the vicinity of a predetermined position, the left and right elevating elastic pieces 64A and 64B provided on the disc cover 14 are guided to the inclined surfaces of the left and right recesses 17 and 17 provided on the disc tray 12. As a result, it enters the recesses 17 and 17. When the disc tray 12 moves to a predetermined position, the left and right elevating elastic pieces 64A and 64B enter the predetermined depths of the left and right recesses 17 and 17, respectively. Accordingly, as shown in FIG. 15B, the disc storage of the disc tray 12 is performed in the contact portion 73 (front contact portion indicated by a thick broken line in FIG. 8) 73 in the first direction X in the annular contact portion 63 of the disc cover 14. It is strongly pressed against the periphery of the part 11. The pressing force of the disc cover 14 is applied by three leaf springs 65A, 65B, and 65C.

  Thereafter, recording or reproduction of the information signal with respect to the optical disc D is started. That is, the spindle motor 29 is driven to rotate the optical disc D, and the optical pickup 26 is operated to write or read information signals on the information recording surface of the optical disc D. At this time, when the optical disk D is rotated at a predetermined speed, wind noise and other noises are generated by the optical disk D, but most of them can be reduced by providing the disk cover 14.

  In order to produce a silent effect when configuring the disc cover 14, it is necessary to prevent the wind flow generated by the rotation of the optical disc D from hitting the top cover 52. This is because when the wind flow hits the top cover 52, noise is generated by the wind flow. Therefore, in this embodiment, the projecting portion 12a is provided on the disc tray 12, and the entire circumference of the disc storage portion 11 is surrounded by the side wall 16. Thereby, it is possible to prevent wind from flowing from the disk storage portion 11 to the top cover 52 side, and to effectively suppress the generation of noise.

  Note that the height relationship when the disc cover 14 is arranged between the optical disc D and the top cover 52 needs to secure a space of 1 mm or more on the upper and lower surfaces of the optical disc D in consideration of surface deflection of the optical disc D. For this reason, in the recent disk drive device 10 that has been made thinner, the space in which the disk cover 14 can be disposed is 0.5 mm. However, a molded product having a thickness of 0.5 mm or less is difficult to mold, and even if it can be molded, the strength is very insufficient. Therefore, at present, the disc cover 14 needs to be made of sheet metal.

  Therefore, when the disc cover 14 is made of sheet metal, it is necessary to consider the structure of the contact portion with the disc tray 12. That is, as in the conventional disk drive device, when the sheet metal is brought into contact with the disk tray 12 at the cut surface (edge surface), the plate thickness is 0.5 mm or less and the contact area is small. A considerable amount of wind generated by the rotation is transmitted to the outside. Therefore, noise is generated when the wind passes through the contact surface, and a preferable silent effect cannot be obtained. On the other hand, in the present invention, the annular contact portion 63 of the disc cover 14 that contacts the disc tray 12 is formed to have a large folding surface that is wider than the cut surface of the sheet metal, so that the contact area is increased and the wind is not easily transmitted. Could be a structure. Therefore, it is possible to prevent or suppress the wind passing through the gap, to prevent an increase in noise level due to the air flow through the gap, and to effectively reduce the noise level generated by the rotation of the optical disc D. It was.

  Further, since the thickness of the disk cover 14 is as thin as 0.5 mm or less, as shown in FIG. 16, there is a risk of warping or floating depending on the processing accuracy of press working. In this case, due to the warping or floating, a gap 75 is generated between the disk tray 12 and the contact portion. If this happens, wind sound due to the rotation of the optical disk D passes through the gap 75 or the wind itself is the gap 75. Noise is generated through the filter.

  In contrast, in the present invention, plate springs 65A, 65B, and 65C are provided on the disc cover 14, and the disc cover 14 is biased (applied with preload) by the spring force of these plate springs. did. Therefore, the top cover 52 is screwed to the tray chassis 51 with the fixing screw 53, so that the preload can be applied with the three leaf springs 65A, 65B, 65C sandwiched from both sides. As a result, the entire annular contact portion 63 of the disc cover 14 can be brought into close contact with the disc tray 12 over the entire circumference by the spring force of the three leaf springs 65A, 65B, 65C.

  The three leaf springs 65A, 65B, 65C are provided on the disc cover 14. The reason is that when caulking the leaf spring, if an attempt is made to caulk to the top cover 52 side, a hole will be formed in the top cover 52, and wind will pass through the hole to generate noise. On the other hand, when the plate spring is caulked to the top cover 14, it is in close contact with the disc tray 12 at the time of assembly, and the caulking hole is blocked by the disc tray 12, which may cause noise. Absent.

  In this embodiment, the example in which the leaf spring 64 is used as the elastic member has been described. However, the present invention is not limited to this. For example, FIG. 13 shows an example in which the leaf spring 77 is cut and raised from the top cover 14 and provided integrally. By providing the leaf spring 77, a gap such as a slit or a hole is formed in the disc cover. However, since the disc cover 14 is brought into close contact with the disc tray 12 during assembly, the gap is provided in the disc tray 12. Occurrence of noise can be prevented. According to this embodiment, the number of parts of the leaf spring 64 can be reduced as compared with the first embodiment. The number of leaf springs is not limited to three as described in the above embodiment, but may be four or more and may be two or only one. Further, a seal member may be provided on one surface side (disc tray side) of the disc cover 14.

  As described above, according to the disc recording and / or reproducing apparatus of the present invention, the disc cover is provided with the elevating portion protruding toward the disc tray side of the disc cover, and the elevating portion is put in and out of the disc tray. Possible recesses were provided. When the disc tray is stored in the tray storage portion, the elevating portion is inserted into the recess and the tray storage portion is closed with the disc cover. As a result, the posture of the disc cover can be changed without using a magnetic force such as a chucking pulley, and interference with the disc cover can be avoided when the disc tray is put in and out. As a result, the number of parts can be reduced, and the entire apparatus can be reduced in thickness and size.

  In addition, the disc cover is configured to cover the entire disc storage portion of the disc tray so as to be closed. For this reason, it is possible to prevent or suppress the air flow generated when the disk-shaped recording medium is rotationally driven from leaking to the outside of the disk cover. Thereby, it is possible to prevent the noise level from increasing due to the air flow through the gap, and to reduce the noise level generated by the rotation of the disk-shaped recording medium.

  Further, the center of rotation of the disc cover is arranged on the back side from the center of the tray storage portion in the tray moving direction. Accordingly, the posture of the disc cover can be changed in a direction away from the disc tray with a small rotation operation.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, an example applied to a notebook personal computer has been described. However, other electronic devices using an optical disk or a magneto-optical disk, such as a desktop personal computer, an electronic dictionary, a DVD player, a car navigation system, and other various types It can be applied to electronic equipment.

1 is a perspective view of a notebook personal computer (notebook personal computer) shown as a first embodiment of a disk recording and / or reproducing apparatus of the present invention. 1 is an external perspective view of a disk drive device of the present invention. 1 is an exploded perspective view of a top cover of a disk drive device according to the present invention. It is a disassembled perspective view of the disc drive apparatus of this invention. It is the perspective view which decomposed | disassembled the guide rail and the fixed rail further from the state shown in FIG. 1 is a perspective view of a drive unit according to a disk drive device of the present invention. It is a top view of the drive unit which concerns on the disc drive apparatus of this invention. It is explanatory drawing which shows the principal part of the disc tray and disc cover of this invention. It is sectional drawing of the disc drive apparatus of this invention. FIG. 10A is an enlarged sectional view showing one end side of the disk drive device of the present invention, and FIG. 10B is an enlarged view of the other end side of the disk drive device of the present invention. FIG. It is explanatory drawing of the contact part of the disc cover and disc tray of this invention. It is explanatory drawing which shows the 1st Example of the elastic member attached to the disc cover of this invention. It is explanatory drawing which shows the 2nd Example of the elastic member attached to the disc cover of this invention. It is explanatory drawing of the state before mounting | wearing the disc tray of this invention with a tray storage housing | casing. FIG. 15A shows a state in which the disk tray of the present invention is mounted in the tray housing case, FIG. 15A is an explanatory diagram showing a state in the middle of mounting the disk tray in the tray housing case, and FIG. 15B shows the disk tray in the tray housing case. It is explanatory drawing which shows the state with which the body was mounted | worn. It is explanatory drawing of the clearance gap which arose between the disc tray and the disc cover.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Notebook-type personal computer (disc recording and / or reproducing | regenerating apparatus), 10 ... Disc drive apparatus, 11 ... Disc storage part, 12 ... Disc tray, 12a ... Overhang | projection part, 13 ... Tray storage housing, 14 ... Disc cover, 14a ... center bulge part, 14b ... annular contact part, 14c ... escape bulge part 17 ... concave part, 20 ... drive unit, 22 ... finger-hanging concave part, 51 ... tray chassis, 52 ... top cover, 53 ... tray storage part, 61 ...・ Pivot, 64A, 64B ... Elevating elastic piece (elevating part), 65A, 65B, 65C, 77 ... Leaf spring (elastic member), D ... Optical disc (disc-shaped recording medium), X ... First direction (tray moving direction) ), Y ... Second direction (direction intersecting)

Claims (8)

A disc tray having a disc storage portion including a concave portion in which a disc-shaped recording medium is stored in a removable manner;
A tray storage housing that supports the disk tray so as to be movable in the surface direction of the disk tray;
A disc cover that is attached to the tray storage portion of the tray storage housing so that the posture can be changed, and that covers the entire disk storage portion of the disk tray stored in the tray storage portion;
With
The disc cover is provided with an elevating part that protrudes toward the disc tray of the disc cover, and the disc tray is provided with a recess into which the elevating part can be taken in and out,
The disk recording and / or reproducing apparatus, wherein when the disk tray is stored in the tray storage section, the elevating section is inserted into the recess and the disk storage section is closed by the disk cover. 2. The disk recording and / or reproducing according to claim 1, wherein the elevating part is provided on at least one of both sides of the disk cover in a direction intersecting a tray moving direction on the opening side of the tray housing part. apparatus. The disk recording and / or reproducing apparatus according to claim 1, wherein the disk cover is attached so as to be rotatable from the center in the tray moving direction of the tray storage portion to the back side. A bulging portion having a size corresponding to the disc storage portion is provided at a central portion of the disc cover, and an annular contact portion continuous in the circumferential direction is provided on an outer peripheral edge of the bulging portion. Item 4. The disk recording and / or reproducing apparatus according to Item 1. The disk recording and / or reproducing apparatus according to claim 1, wherein the elevating unit is provided integrally with the disk cover using an elastic material. The disk recording and / or reproducing apparatus according to claim 5, wherein the disk cover is formed of a sheet metal having a thickness of 0.5 mm or less. The disk recording and / or reproducing apparatus according to claim 1, wherein an elastic member that biases the disk cover toward a main surface of the disk tray is provided in the tray housing case or the disk cover. The disk recording and recording apparatus according to claim 7, wherein the elastic member includes a plate spring fixed to the tray housing case or the disk cover, and the disk cover is pressed by the plate spring. / Or playback device.

Images