JP2007128615A - Disk recording/reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To push-in/out a tray without using any electric or electronic means for tray driving in a disk player for pushing a disk recording medium into a casing by a tray to execute recording or reproducing. <P>SOLUTION: This device includes a winding spring 40 for generating an elastic restoring force of an eject direction with respect to a tray when the tray is supported on a chassis 11 to move, and the tray is pushed into a deepest part, a push-push type lock mechanism 50 for locking in a pushing position, and a detection switch 60 pushed to carry out a detection operation. Locking is provided by the push-push type lock mechanism 50, and the winding spring 40 charges energy for ejecting. By pushing in the tray more, the locking of the push-push lock mechanism 50 is released, and the tray is pushed out at least by a stroke to grip it by fingers by the winding spring 40. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a disk-type recording / reproducing apparatus, and in particular, a tray is attached so as to be able to be pushed into and pulled out from a casing, and the disk-shaped recording medium is pushed into the casing by the tray to record or reproduce the disk-shaped recording medium. The present invention relates to a disk type recording / reproducing apparatus.

  2. Description of the Related Art Disc players are widely used in which a signal is written on an optical pickup or a written signal is read from a disc-shaped recording medium such as a CD (compact disc).

  For example, Japanese Patent Laid-Open No. 7-182759 discloses a cartridge holder that holds a disk cartridge so as to be movable in the front-rear direction, and a cartridge movement that can be moved in the front-rear direction with respect to the cartridge holder and engages with the disk cartridge. The size of the device is reduced by preventing the cartridge holder from being moved back and forth in the forward and backward direction, and the disk cartridge is fully ejected outward while being held by the cartridge moving plate when ejecting. A disk loading device is disclosed which can be used.

  In the case of a disc player using a bare disc instead of such a cartridge type recording medium, a tray is provided so as to be movable with respect to the housing as disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-178711. The optical disk is placed in the recess of the tray, and the tray is pushed into the casing in this state, whereby the tray is pulled into the casing and moves to a position where the disc-shaped recording medium can be operated. At this position, the optical pickup accesses the disc, thereby performing the recording / reproducing operation.

In the case of a conventional disc player provided with this type of tray-type disc transport mechanism, the disc is pulled in or pushed out by a motor. When such a drive system using a motor is employed, a motor driver, a control unit including a control microcomputer, and the like are required in addition to the motor, thereby increasing costs. A CD drive incorporated in a personal computer normally performs a pushing operation manually, but performs an ejecting operation with a plunger to release a tray. Therefore, in this case, although a motor and its drive system are not required, a plunger and a drive circuit for the plunger and its control unit are required, thereby increasing the cost.
JP-A-7-182759 JP 2004-178711 A

  The object of the present invention is to eliminate the need for a motor, a motor driver, a control unit including a microcomputer, etc. for driving a tray on which a disk-shaped recording medium is placed and moved to a recording and / or reproducing position. A disc-type recording / reproducing apparatus is provided.

  Another object of the present invention is to provide a disc-type recording / reproducing apparatus in which a plunger is not used for ejecting a tray which is loaded with a disc-shaped recording medium and pulled into the housing, thereby greatly simplifying the structure. Is to provide.

  Still another object of the present invention is to provide a disc-type recording / reproducing apparatus that greatly simplifies a tray driving mechanism for drawing a disc-shaped recording medium into a housing, thereby enabling cost reduction.

  Still another object of the present invention is to provide a disc-type recording / reproducing apparatus having a tray driving mechanism with a simple structure without impairing operability.

  Still another object of the present invention is to provide a disc-type recording / reproducing apparatus in which the push-in and pull-out operations of the tray on which the disc-shaped recording medium is placed are manually performed.

  The above-described problems and other problems of the present invention will be made clear by the technical idea of the present invention described below and the embodiments thereof.

The main invention of the present application is that a tray is attached so as to be able to be pushed and pulled out with respect to a housing, the tray is pulled out, a disk-shaped recording medium is placed on the tray, and the tray is pushed into the housing. In a disc type recording / reproducing apparatus adapted to record or reproduce a disc-shaped recording medium,
An urging means for urging the tray in a pulling-out direction when the tray is completely pushed into the housing;
Lock means for locking the tray against the urging force of the urging means in a state where the tray is completely pushed;
Detecting means for detecting when the tray is completely pushed into the housing and locked by the locking means;
And a recording and / or reproducing operation is performed after the detection means detects,
In addition, the present invention relates to a disc type recording / reproducing apparatus characterized in that when the lock by the lock means is released, the urging means pushes the tray in a pull-out direction so that the tray can be grasped by at least a finger.

  Here, pickup means is provided on the tray so as to be movable in the radial direction of the disc-shaped recording medium, and when the pickup means accesses while moving in the radial direction with respect to the rotating disc-shaped recording medium, Recording and / or playback may be performed. In addition, the tray may be attached to the housing by guide means so as to be pushed and pulled out. Further, the biasing means may be constituted by a winding spring, one end of which is in contact with or locked with the housing, and the other end of which is in contact with the contacted portion of the tray. In addition, the winding spring is disposed in the housing in the vicinity of the innermost portion of the area into which the tray is pushed, and a free end constituting the other end of the winding spring is provided on the tray. You may make it contact | abut to the to-be-contacted part which consists of.

  The locking means may be a push-push type locking mechanism. The push-push type locking mechanism includes a lock pin provided on the tray and an irregular lock member that holds the lock pin. When the tray is pushed, the lock pin is moved to the lock member. When the tray is pushed in the pushing direction in the locked state, the lock pin may be released from the locking recess and the lock may be released. Further, the lock pin is provided on the tray via an elastically deformable arm, and a guide inclined surface is formed facing the exit portion of the lock recess of the lock member, and the tray further pushes in the locked state. When pushed in, the arm may be elastically deformed by the guide inclined surface, and the lock pin may be separated from the lock recess while being laterally biased.

  Further, the detection means may be a switch pushed by a part of the tray. In addition, the switch may be disposed in the housing in the vicinity of the innermost portion of the area where the tray is pushed, and may be pushed at the tip of the tray in the pushing direction.

  Further, a buffer means for buffering the pushing and / or drawing operation of the tray may be provided. The buffer means has a rack provided on the tray, a pinion meshing with the rack, and a brake wheel driven by the pinion. When the brake wheel rotates, friction is generated and the buffer operation is performed. May be performed.

  A preferred embodiment of the present invention is a state in which a disc-shaped recording medium is placed and moved to a recording / reproducing position in the housing in a ejecting direction by a winding spring and pushed by a push-push type locking mechanism. The tray is pushed by the elastic restoring force of the above-mentioned winding spring and ejected slightly by pushing it further against the tray that is fully pushed and in the operating position. Is grasped with a finger and pulled out completely.

  According to such a configuration, a tray driving mechanism is achieved only by a mechanical configuration without the need for a motor, a motor driver, a control unit including a microcomputer, an ejecting plunger, or the like that moves the tray in the pushing direction and the drawing direction. Is possible. Accordingly, the structure of the tray drive mechanism is simplified, and the cost of the tray drive unit can be greatly reduced.

  The main invention of the present application is that a tray is attached so as to be able to be pushed and pulled out with respect to the housing, the tray is pulled out to place a disk-shaped recording medium on the tray, and the tray is pushed into the housing to form a disk-shaped recording medium. In a disk-type recording / reproducing apparatus adapted to perform recording or reproduction of the disk, when the tray is completely pushed into the housing, the urging means for urging the tray in the pulling-out direction and the state where the tray is completely pushed And locking means for locking the tray against the urging force of the urging means, and detecting means for detecting when the tray is completely pushed into the housing and locked by the locking means. When the recording and / or reproducing operation is performed after detection by the detection unit and the lock by the lock unit is released, the tray is reduced in the pull-out direction by the biasing unit. Both is obtained so as to be a stroke extrusion can be gripped with the fingers.

  Therefore, according to such a disc type recording / reproducing apparatus, when the tray is manually pushed into the housing, the urging means is charged, and the tray is locked by the locking means in the fully pushed state. In this state, recording and / or reproducing operations are performed. In addition, when the locked tray is further pushed in, the lock by the locking means is released, and the tray is pushed out by the urging force of the urging means by a stroke that can be picked at least with a finger in the drawing direction. Accordingly, in this state, the tray can be pulled out with a finger and pulled out. As a result, it is possible to provide a disc type recording / reproducing apparatus having a tray drive mechanism that does not require a motor, a plunger, its driver, or a control unit including a control microcomputer.

  The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 and FIG. 2 show an almost entire configuration of the disc player according to the present embodiment. This disc player includes an outer casing 10 having a rectangular parallelepiped shape, and a chassis 11 is provided in the outer casing 10. Fixedly arranged. A tray 12 is provided so as to be movable and withdrawable with respect to the chassis 11. That is, the tray 12 is incorporated so as to be movable with respect to the front side opening 14 of the outer casing 10.

  The tray 12 is guided by guiding means on the side walls 13 provided on both sides of the chassis 11. The structure of the guide means will be described. The guide members 15 that are relatively long in the moving direction of the tray 12 are provided in the back side portions of the left and right side walls 13, and the protrusions provided on the upper surfaces of these guide members 15. 16 is engaged with a groove on the lower surface of the tray 12. A guide member 17 that is relatively short with respect to the moving direction of the tray 12 is provided inside the left side wall 13. A protrusion 18 is formed on the upper surface of the guide member 17, and the protrusion 18 is fitted in the groove of the tray 12. It is out. Further, a guide member 19 that is short in the moving direction of the tray 12 is provided inside the right side wall 13, and a protrusion 20 on the upper surface of the guide member 19 is engaged with a groove portion on the lower side of the tray 12. It has become so.

  Next, a structure for holding the tray 12 will be described. A presser 23 is provided on the inner side surface of the left side wall 13, while a pair of pressers 24 and 25 are provided on the inner side of the right side wall 13. These pressers 24 and 25 prevent the tray 12 from floating upward from the guide surface by the guide members 15, 17 and 19 described above. Further, stoppers 26 are provided inside the left and right side walls 13, respectively. The stopper 26 can be elastically deformed, and a claw 27 provided on the left side and the back side of the tray 12 can be climbed over. Moreover, when the tray 12 is moved in the drawing direction, it comes into contact with the stopper 26, thereby restricting the maximum drawing position.

  The structure on the tray 12 movably attached to the outer casing 10 and the chassis 11 will be described. A circular recess 29 is formed in the tray 12, and a CD (compact disc) composed of a bare disk is received and held by the recess 29. Further, an odd-shaped opening 30 is formed so as to cross the circular recess 29, and a pickup unit 31 is attached to the opening 30. The pickup unit 31 includes a spindle motor 32 so as to coincide with the center of the circular recess 29, and a turntable 33 is directly connected to the output shaft of the spindle motor 32. Further, the pickup unit 31 includes a long hole 34 that moves in the radial direction of the circular recess 29, and the optical pickup 35 is movably supported by the long hole 34. That is, the optical pickup 35 is guided by the guide rods 36 on both sides of the long hole 34 so as to be movable in the radial direction of the compact disc placed on the turntable 33. In addition, the optical pickup 35 is moved in the radial direction of the compact disc by a motor 37 provided at the lower portion of the pickup unit 31 via a feed screw (not shown).

  Next, an urging means for ejecting the tray 12 will be described. A winding spring 40 is mounted on the chassis 11 and is held by a mounting screw 41. A portion on one end side of the winding spring 40 is pushed by the abutting protrusion 42 of the chassis 11, and a free end portion on the opposite side of the winding spring 40 protrudes from the lower surface of the tray 12. It is made to contact | abut to the pin 43 made.

  Next, a mechanism for locking when the tray 12 is pushed in will be described. The tray 12 is formed of a synthetic resin molded body, and a rectangular opening 47 is formed in a portion on the back side thereof, and an elastic arm 48 is integrally provided so as to protrude into the opening 47. A lock pin 49 is connected to the portion on the tip side of the elastic arm 48 so as to protrude downward. The lock pin 49 engages with the lock recess 51 of the lock member 50. That is, in a state where the tray 12 is pushed, the lock pin 49 is engaged with the locking recess 51 to lock the tray.

  The structure of the lock member 50 that locks the lock pin 49 will be described in more detail. Specifically, as shown in FIGS. 3 to 6, the lock member 50 includes an inclined surface 54 at the inlet side thereof, and the inclined surface 54. The terminal end side is a horizontal stepped portion 55. The lock member 50 includes a triangular protrusion 56 at the end of the stepped portion 55. One side portion of the triangular projection 56 is a guide inclined surface 57. The guide inclined surface 57 faces the exit portion of the locking recess 51.

  Next, detection means for detecting when the tray is pushed and locked by the lock member 50 in a state where the disc-shaped recording medium is placed on the tray 12 will be described with reference to FIGS. 2, a detection switch 60 is provided in the vicinity of the innermost portion of the chassis 11, and a rib 61 that presses an operation element of the detection switch 60 is attached to a lower surface of the tray 12 and a front end side portion. ing.

  Next, an outline of the operation of pushing and ejecting the disc-shaped recording medium by the tray 12 in the disc-type recording / reproducing apparatus having the above configuration will be described. As shown in FIG. 2, the optical disk is placed in the circular recess 29 of the tray 12 with the tray 12 pulled out. In this state, the tray 12 is pushed into the outer casing 10 by hand. The tray 12 is pushed from the state shown in FIG. 2 to the state shown in FIG. 1 while being guided by the left and right guide members 15, 17 and 19.

  When the tray 12 is completely pushed, the elastic arm 48 provided on the tray 12 falls into the locking recess 51 of the lock member 50 constituting the push-push type locking mechanism, whereby the tray 12 is locked. Is done. Further, in conjunction with the pushing operation of the tray 12, the winding spring 40 is elastically deformed to charge elastic energy.

  The rib 61 on the front end side of the tray 12 presses the operation switch of the detection switch 60 in conjunction with the pushing of the tray 12 and the locking by the push-push type locking mechanism including the lock member 50. Accordingly, in conjunction with this detection operation, the recording / reproducing operation for the disc-shaped recording medium on the tray 12 is performed. In this operation, the spindle motor 32 rotates and drives the optical disk through the turntable 33 in a state where it floats from the circular recess 29 of the tray 12. At this time, the motor 37 moves the optical pickup 35 along the long hole 34 in the radial direction of the optical disk. By such an operation, a recording and / or reproducing operation with respect to the disk-shaped recording medium drawn by the tray 12 is performed.

  After completing the predetermined recording and / or reproducing operation, the portion on the front end side of the tray 12 is pushed into the housing 10 through the horizontally long opening 14 with a finger. Then, the lock pin 49 of the tray 12 is disengaged from the locking recess 51 of the lock member 50, whereby the lock of the tray 12 is released. Accordingly, the tray 12 is pushed in the ejecting direction, that is, the drawing direction by the elastic energy of the winding spring 40, as indicated by the chain line in FIG. At this time, the eject amount of the tray 12 by the winding spring 40 is set to a value of about 20 to 50 mm, and for this purpose, the front end side portion of the tray 12 protrudes through the front side opening 14 by about 20 to 50 mm. Therefore, in this state, by pulling out and pulling out the tip side portion protruding outside the front side opening 14 of the outer casing 10 of the tray 12, the drawing operation of the tray 12 is completed. When the lock of the tray 12 by the lock member 50 is released and the tray 12 is pushed out by the winding spring 40, the pressing by the rib 61 of the tray 12 of the detection switch 60 is released, and thereby the detection switch 60 is turned off. Switched.

  Here, the operation of the push-push type locking mechanism including the locking member 50 for locking the lock pin 49 of the tray 12 will be described with reference to FIG. When the tray 12 is pushed in, the lock pin 49 at the position shown in FIG. 7A is pushed by the oblique guide wall 53 as shown in FIG. 7B, and rises on the inclined surface 54 and rises on the stepped portion 55. At this time, the elastic arm 48 is elastically deformed rightward and upward, and the lock pin 49 moves upward.

  Thereafter, the lock pin 49 that has passed over the stepped portion 55 passes through the portion on the distal end side of the lock member 50, is biased to the left by the elastic restoring force of the elastic arm 48, and then falls into the locking recess 51 (FIG. 7C , D). When the lock pin 49 completely falls into the lock recess 51, the lock pin 49 is disengaged from the left end of the stepped portion 55, so that the lock pin 49 moves downward by the elastic restoring force of the elastic arm 48.

  Next, the unlocking operation will be described. The unlocking operation is performed by further pushing the tray 12 while the tray 12 is locked. When the tray 12 is further pressed in the pushing direction, the lock pin 49 is detached from the locking recess 51 as shown in FIG. 7E. Thereafter, the lock pin 49 is biased to the left while being guided by the left inclined wall surface of the step portion 55 and the guide inclined surface 57 on the side surface of the triangular projection 56. Since the lock pin 49 falls from the left end of the step portion 55 and is lowered, the lock pin 49 is restricted by the left end of the step portion 55 and does not rise to the right and move to the right. After that, it passes by the side of the lock member 50 (see FIGS. 7F and G), and is further separated from the lock member 50 (see FIG. 7H). When separated from the lock member 50, the elastic arm 48 provided with the lock pin 49 at the tip is in a straight state and returns to the original state.

  As described above, in the disc player according to the present embodiment, the disc-shaped recording medium is mounted on the tray 12 which is pulled out and ejected by the user, and the tray 12 is pushed in, so that the tip side portion of the tray 12 is removed When the pressing is stopped at a position where the stroke is further overstroked from the front surface of the housing 10, the portion on the front end side of the tray 12 is separated from the front surface portion of the outer housing 10 by the force of the winding spring 40 applied to the tray 12. Return to the matching position. At this time, the lock pin 49 of the tray 12 is locked by the locking recess 51. Then, the released switch 60 in the OFF state is pressed in conjunction with the lock of the tray 12 to confirm the insertion of the tray 12, thereby making the disc-shaped recording medium reproducible.

  The ejecting operation of the tray 12 is performed by further pushing the portion on the front end side of the tray 12. By this operation, the lock of the tray 12 by the lock member 50 is released, and for this purpose, the tray 12 is pushed out by the force of the winding spring 40 and pushed out at least by a stroke that can be grasped by a finger. Here, when the force of the winding spring 40 is weak, the tray 12 cannot be ejected completely. Therefore, the half-extruded tray 12 is pulled out by hand to obtain a complete ejected state. Further, when the disc-shaped recording medium on the tray 12 is rotating during the ejecting operation, the detection switch 60 is turned off in conjunction with the ejecting operation of the tray 12, so that the recording / reproducing operation is stopped. The

  Such a manual loading and ejecting mechanism of the tray 12 is a push-push type mechanism comprising a winding spring 40 for returning the tray 12 and a lock member 50 in a configuration in which the tray 12 is slidably supported on the chassis 11. This is achieved by the locking mechanism and the detection switch 60, and the loading and ejecting mechanism of the tray 12 is achieved by a very simple configuration. Accordingly, this simplifies the structure and enables a significant cost reduction.

  Next, the configuration of the modification will be described with reference to FIGS. In this modification, a buffer mechanism is further added to the above embodiment. That is, a rack 72 is provided on one side of the lower surface of the tray 12, and a pinion 73 that engages with the rack 72 is rotatably supported on the chassis 11 by a support shaft 74. A brake wheel 75 driven by the pinion 73 is provided. As shown in FIG. 9, the brake wheel 75 includes a gear 76 on the outer peripheral side thereof, and the gear 76 meshes with the pinion 73. The brake wheel 75 is rotatably supported by the support shaft 77 and is pressed against the ring-shaped felt plate 80 by a spring 79 pressed by a disc-shaped presser 78 attached to the upper end of the support shaft 77. The felt plate 80 is attached to the periphery of the support shaft 73 on the protrusion 81 of the chassis 11.

  Accordingly, when the tray 12 is pushed and ejected, the tray 12 is moved, whereby the pinion 73 is driven via the rack 72, and the gear 76 of the brake wheel 75 is further driven. Accordingly, the braking wheel 75 generates friction with the felt plate 80, and thereby the braking operation is performed. Since this braking force exerts a buffering action, the tray 12 is pushed and pulled out.

  In particular, when a spring having a large elastic restoring force is used as the winding spring 40, the tray 12 is pushed out vigorously by the spring 40 when the lock by the lock member 50 constituting the push-push type lock mechanism is released. There is a possibility. However, at this time, since the impact force is buffered by the frictional force generated between the braking wheel 75 and the felt plate 80, the tray 12 is pushed out slowly, and thereby a more stable eject. Operation becomes possible.

  Although the present invention has been described above with reference to the illustrated embodiments, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the technical idea of the invention included in the present application. For example, the disk-shaped recording medium pushed by the tray 12 is not limited to a CD, and disk-shaped recording media of various formats are used. In the above embodiment, the turntable 33 and the pickup 35 are arranged on the tray 12. However, the turntable 33 and the optical pickup 35 may be attached to the chassis 11 side.

  The present invention can be widely applied to an optical disc player using an optical disc such as a CD.

It is a principal part top view of a disc-type recording / reproducing apparatus. It is a top view of the disc type recording / reproducing apparatus in the state where the tray is pulled out. It is the left view, top view, and right view of a push-push type locking mechanism. It is the DD sectional view taken on the line in FIG. 3B. It is the EE arrow directional view in FIG. 3B. It is a principal part disassembled perspective view of a push-push type locking mechanism. It is a top view which shows lock operation (AD) and lock release operation (EH) by a push-push type locking mechanism. It is a principal part top view of the disc type recording / reproducing apparatus of a modification. It is a longitudinal cross-sectional view which shows the structure of the brake wheel in the modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Outer casing, 11 ... Chassis, 12 ... Tray, 13 ... Side wall, 14 ... Front side opening, 15 ... Guide member, 16 ... Projection, 17 ... Guide member, 18 ... Projection, 19 ... Guide member, 20 ... Projection, 23, 24, 25 ... Press, 26 ... Stopper, 27 ... Claw, 29 ... Circular recess, 30 ... Opening, 31 ... Pickup unit, 32 ... Spindle motor, 33 ... Turntable, 34 ... Slot, 35 ... Optical pickup, 36 ... Guide rod, 37 ... Motor, 40 ... Coil spring, 41 ... Mounting screw, 42 ... Abutting part, 43 ... Pin, 47 ... Opening, 48 ... Elastic arm, 49 ... Lock pin, 50 ... Lock member, 51: recess for locking, 53: oblique guide wall, 54 ... inclined surface, 55 ... stepped portion, 56 ... triangular projection, 57 ... inclined surface for guide, 60 ... detection switch, 61 ... rib, 72 ... rack, 73 ... pini ON, 74 ... support shaft, 75 ... braking wheel, 76 ... gear, 77 ... support shaft, 78 ... presser, 79 ... spring, 80 ... felt plate, 81 ... projection

Claims (12)

A tray is attached so as to be able to be pushed and pulled out with respect to the housing, the tray is pulled out to place a disk-shaped recording medium on the tray, and the tray is pushed into the housing to record or record the disk-shaped recording medium. In a disc-type recording / reproducing apparatus adapted to perform reproduction
A biasing means for biasing the tray in a direction of pulling out the tray when the tray is completely pushed into the housing;
Lock means for locking the tray against the urging force of the urging means in a state where the tray is completely pushed;
Detecting means for detecting when the tray is completely pushed into the housing and locked by the locking means;
And a recording and / or reproducing operation is performed after the detection means detects,
Moreover, when the lock by the locking means is released, the disc type recording / reproducing apparatus is characterized in that the urging means pushes the tray in a pull-out direction so that the tray can be grasped at least with a finger.   Pickup means is provided on the tray so as to be movable in the radial direction of the disk-shaped recording medium. When the pickup means accesses the disk-shaped recording medium rotating while moving in the radial direction, signal recording and / or 2. The disc type recording / reproducing apparatus according to claim 1, wherein reproduction is performed.   2. The disc type recording / reproducing apparatus according to claim 1, wherein the tray is attached to the casing so as to be freely pushed and pulled out by a guide means.   The said urging | biasing means is comprised from a winding spring, One end is contact | abutted or latched with a housing | casing, and the other end is contact | abutted with the to-be-abutted part of a tray. Disc recording / playback device.   The winding spring is disposed in the housing and in the vicinity of the innermost portion of the area into which the tray is pushed, and a free end constituting the other end of the winding spring is provided from a pin provided on the tray. 2. The disc type recording / reproducing apparatus according to claim 1, wherein the disc type recording / reproducing apparatus is in contact with a contacted portion.   2. The disc type recording / reproducing apparatus according to claim 1, wherein the locking means is a push-push type locking mechanism. The push-push type locking mechanism includes a lock pin provided on the tray and an irregular lock member that holds the lock pin. When the tray is pushed, the lock pin is Drop into the locking recess and lock
7. The disc type recording / reproducing apparatus according to claim 6, wherein when the tray is further pushed in the pushing direction in the locked state, the lock pin is detached from the locking recess and the lock is released.   The lock pin is provided on the tray via an elastically deformable arm, and a guide inclined surface is formed facing the exit portion of the lock recess of the lock member, and the tray further moves in the pushing direction in the locked state. 8. The disk type according to claim 7, wherein when pushed, the arm is elastically deformed by the guide inclined surface and the lock pin is released while being laterally biased with respect to the lock recess. Recording / playback device.   2. The disc type recording / reproducing apparatus according to claim 1, wherein the detecting means is a switch pushed by a part of the tray.   10. The switch according to claim 9, wherein the switch is disposed in the housing in the vicinity of the innermost portion of the region into which the tray is pushed, and is pushed at a tip portion of the tray in the pushing direction. Disc recording / playback device.   2. The disc type recording / reproducing apparatus according to claim 1, further comprising buffer means for buffering the pushing and / or pulling operation of the tray. The buffer means includes a rack provided on the tray, a pinion that meshes with the rack, and a brake wheel that is driven by the pinion. When the brake wheel rotates, friction is generated to perform a buffer operation. 12. The disc type recording / reproducing apparatus according to claim 11, wherein

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