KR0172094B1 - Disk loading apparatus - Google Patents

Abstract

A disk arrangement plate on which a disk is disposed so as to be supported on the chassis inside the frame so as to be movable in the withdrawal / storage direction;

A rack provided on the disk placement plate side and having a straight rack portion formed in a straight line according to a moving direction of the disk placement plate, and an arc-shaped rack portion that is bent in succession to the straight rack portion;

A disk rotation drive mechanism and an optical head are disposed, a first position spaced from the disk in which the disk rotation drive mechanism is disposed in the recess of the disk mounting plate with respect to the chassis, and the disk rotation driving mechanism is arranged on the disk mounting plate. A base unit attached to the chassis so as to be movable between a second position for rotationally driving the disc,

And a cam member composed of a gear mechanism coupled to the rack and a cam groove coupled to the engaged portion provided in the sub-chassis while being rotationally driven by a driving force of the motor, the drive mechanism disposed in the chassis,

The disc arrangement plate is moved by the gear mechanism and the rack in the take-out / receive direction, and the cam member is rotated by the gear mechanism when the gear mechanism moves from the linear rack portion to the arc-shaped rack portion. And move the chassis from the first position to the second position.

Description

Disc loading device

The present invention relates to a disc loading apparatus provided in a disc player.

In the disk loading apparatus, the lifting control of the disk support means is configured to be performed by cam means rotated by the rotational movement of the planetary gear of the planetary gear mechanism coupled to the arc-shaped rack portion provided on the disk mounting plate. The lifting and lowering operation of the disk support means, that is, the chucking operation of the disk, is interlocked with the press-in operation of the disk mounting plate so that the disk support means can be smoothly and surely performed.

In general, in a disc loading apparatus, a disc is placed on a disc placing plate provided to be accessible and moved to a driving unit, and then either one of the disc placing plate and the driving unit is moved up and down relative to the other to mount the disc to the driving unit ( Chucking) is performed.

In the conventional disk loading apparatus of this type, the access control of the disk placing plate and the lifting control of the disk placing plate are performed by a pinion coupled to a substantially linear rack and a linear rack orthogonal to the rack. Published 61-48162).

That is, this disk loading apparatus is provided with the 1st linear rack formed in the same direction as the movement direction, and the 2nd linear rack formed in the direction orthogonal to this rack, and this rack loading board is provided on this fixed side. Is engaged, and the pinion gear is rotated by the motor is installed, the pinion gear is engaged with the disk arrangement plate in the range that the pinion gear is coupled to the first linear rack, the pinion gear is the second linear rack Is coupled to the second linear rack, the pinion gear is linearly rotated in a direction orthogonal to the moving direction of the disk mounting plate to operate the drive mechanism to move the disk mounting plate up and down. .

However, in the conventional disc loading apparatus, the lifting control of the disc placing plate is performed by linear movement in accordance with the linear rack by changing the direction of the pinion gear in the direction orthogonal to the moving direction of the disc placing plate. As the activity becomes insufficient, there is a fear that the lifting operation of the disk mounting plate, that is, the chucking operation of the disk, becomes unstable.

This invention is made | formed in view of this point, Comprising: It aims at providing the disk loading apparatus in which the disk chucking is performed smoothly and reliably.

1 is a perspective view of an essential part of the device of the present invention;

2 is a perspective view of a part of the disk mounting plate cut away;

3 is a perspective view of the chucking member;

4 is an exploded perspective view of the planetary gear mechanism and the cam member.

Fig. 5 is a front view in which a part of the device of the present invention is taken in cross section;

6A and 6B are longitudinal cross-sectional views illustrating the operation of the lock mechanism portion of the optical head.

7A and 7B are cross-sectional side views illustrating a part of the lifting and lowering operation of the base unit.

8A to 8C are partially cutaway plan views illustrating the operation of the planetary gear mechanism according to the movement of the disk mounting plate.

Explanation of symbols on the main parts of the drawings

2: mechanical chassis 4: disk layout

8: base unit as disk support means

30: swing arm 32: sun gear

33: planetary gear 39: cam member

47: rack 48: straight rack portion

49: arc shaped rack portion 50: guide groove

DISCLOSURE OF THE INVENTION In order to achieve the above object, a disk loading apparatus of the present invention includes a disk arranging plate which is supported to be accessible to a frame, a linear rack portion provided in a straight line according to the direction of entry and exit of the disk arranging plate, and the rack portion. A planetary gear coupled to the planetary gear, a sun gear coupled to the planetary gear, a swinging arm for rotationally supporting the planetary gear about the sun gear, a cam means that is integrally rotated with the swinging arm, and coupled to the cam means. It is configured to include a disk support means that is lifted and controlled. It is effective to provide the above-mentioned disk mounting plate with guide means for guiding the swinging arm along the straight rack portion and the arc rack portion. In addition, the cam means is preferably spring-pressed in the upward direction.

The above means work as follows.

When the planetary gear is driven to rotate in a predetermined direction via the sun gear from the state where the disk mounting plate is taken out, the rotation is transmitted from the planetary gear to the linear rack portion, whereby the disk mounting plate is moved in the storage direction. Then, when the planetary gear is brought into engagement with the arc-shaped rack portion, the planetary gear rotates along the arc-shaped rack portion, whereby the swinging arm is rotated. In the initial operation, the disc holding plate is decelerated at a position immediately before the disc placing plate is stored, and then the disc supporting means is lifted by the cam means which is rotated integrally with the swinging arm, and the disc is chucked.

In this operation, the swinging arm is guided by the guide means provided on the disk mounting plate, whereby the engagement between the planetary gear and the rack is reliably supported. Further, as the cam means is pressurized in the ascending direction, the disc supporting means is brought into pressure contact with the fixed portion at the raised position, and is stably supported.

An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, reference numeral 1 denotes a disk loading apparatus according to the present invention as a whole, and 2 is a mechanical chassis in which the mechanism parts are constructed, and this mechanical chassis 2 is a frame (not shown) of the disc player via legs 3. Is not fixed).

Reference numeral 4 denotes a disk mounting plate, 4a is a circular recess in which the disk is placed and supported, 4b is an insertion hole in which an optical head or turntable described later is inserted, and the disk mounting plate 4 is attached to the mechanical chassis 2. It is slidably supported in the front-rear direction, that is, it is supported to be accessible to the frame of the disc player. That is, the bearing members 5 and 6 are fixed to the one end of the upper surface of the mechanical chassis 2 at predetermined intervals, and the slider rod 7 is inserted into the bearing holes 5a and 6a of the bearing members 5 and 6. The disk mounting plate 4 is moved back and forth with respect to the mechanical chassis 2 by being slidably inserted and supported in the front and rear directions, and fixed to the front and rear portions of the disk mounting plate 4 at both ends of the slider rod 7. It is supported to be movable in the direction.

Reference numeral 8 denotes a base unit on which an optical head or the like is mounted, and the base unit 8 is supported by the opening 9 formed in the mechanical chassis 2 so as to be lifted and lowered.

This base unit 8 is comprised from the chassis 8a which attaches the base unit formed in the shape one rotation larger than the opening part 9, and the board | substrate 8b supported by this chassis 8a, and this board | substrate 8b Various drive parts are provided above.

That is, the slider 11 is supported so that it can slide back and forth along the guide shaft 10 provided in one side part of the board | substrate 8b, The optical head 12 is fixed on this slider 11, Between the slider 11 and the board | substrate 8b, the linear motor 13 is comprised. The linear motor 13 has a yoke 13a fixed to the substrate 8b and a coil bobbin 13b fixed to the slider 11. The magnet 13c is attached to the yoke 13a so as to face the moving coil bobbin 13b, and the linear motor 13 moves the optical head 12 in the front-rear direction, that is, in the radial direction of the disk. It is configured to be.

Moreover, the spindle motor 14 is arrange | positioned in the board | substrate 8b ahead of the front end position of the slider 11, and the drive shaft 14a of this spindle motor 14 turnstable which supports the center hole of a disk ( 15) is attached.

Thus, the board | substrate 8b in which the various drive components were supported is supported by the attachment member 16 which inserts the coil spring 16a as a shock absorbing member in four corners in the floating state to the chassis 8a with a base unit. It is.

The rear end portion of the chassis 8a to which the base unit is attached is provided with shaft portions 17 protruding from both left and right sides, and the opening portion 9 is provided in the lower surface portion of the mechanical chassis 2 corresponding to the shaft portion 17. The bearing 18 is provided at the rear of the shaft. By pivoting the shaft portion 17 to the bearing portion 18, the base unit 8 is connected to the opening 9 at the lower surface side of the mechanical chassis 2. Correspondingly, lifting and lowering is possible, that is, rotatably supported (up / down) about the turning part.

In addition, a roller 19a having a coupling pin 19 protruding therein is inserted into an end of the base unit 8, that is, the front part of the chassis 8a to which the base unit is attached. This roller 19 will be described later. It is coupled to the cam member of the drive mechanism, and configured to perform the rotary lifting operation of the base unit 8 by the operation of the cam member.

In addition, the base unit 8 is provided with a lock mechanism 20 for preventing the movement of the optical head 12 when the disc player is transported.

That is, the engaging recess 21 is provided at one side predetermined position of the slider 11, while the slider 11 is at the foremost position at one side end of the chassis 8a to which the base unit is attached. At a position corresponding to the engaging portion 21, the hook-shaped lock arm 22 is pivotally rotatable by the support shaft 23 in an inward and outward direction, that is, a direction orthogonal to the moving direction of the slider 11.

The base portion of the lock arm 22 extends and protrudes at right angles to the outward direction to form an acting piece 22a. The tip end portion is bent upward in an L shape to correspond to the lower surface of the mechanical chassis 2. .

In addition, an elastic pressing piece 24 protrudes from the lower surface portion of the mechanical chassis 2, and its tip portion is provided with a lower surface side of the lower surface side of the acting piece 22a of the lock arm 22 bent inward to an L shape. It corresponds. Moreover, the recessed part 25 which escapes to the position corresponding to the lock arm 22 is formed in the edge part of the opening part 9 of the mechanical chassis 2, by which the lock arm 22 stands up and rotates. It is comprised so that it may not contact the mechanical chassis 2 at the time.

When the base arm 8 is in the lowered position, the lock arm 22 contacts the lower surface of the acting piece 22a to elastically press the tip of the pressing piece 24 of the mechanical chassis 2, and Thus, the distal tip engaging portion engages with the engaging recess 21 of the slider 11, whereby the optical head 12 is immovably locked (Fig. 6A).

In addition, when the base unit 8 is raised, the tip of the working piece 22a is joined to the lower surface of the mechanical chassis 2 so that the lock arm 22 is released from the engaging recess 21 of the slider 11. The stand is rotated so that the lock of the optical head 12 is released (FIG. 6B).

The lock arm 22 may be biased in a direction that is always engaged with the engagement recess 21 by a spring member.

As described above, on the front of the mechanical chassis 2 on which the disk mounting plate 4 is supported to be movable in the front-rear direction and the base unit 8 is supported to move up and down, the disk mounting plate 4 A drive mechanism for carrying out the movement operation and the lifting operation of the base unit 8 is provided.

This drive mechanism is comprised as follows. Reference numeral 27 is a motor fixed to the lower surface side of the mechanical chassis 2, and the drive shaft 27a of the motor 27 protrudes to the upper surface side, and a pulley 28 is attached to the front end thereof.

In addition, the shaft 29 is supported by penetrating the upper and lower surfaces of the mechanical chassis 2 at positions spaced by the motor 27, and the pivot arm 30 is supported by the upper surface of the mechanical chassis 2 on the shaft 29. ) Is pivotally rotated in a horizontal direction, and a planetary gear mechanism 31 is provided on the swinging arm 30. The planetary gear mechanism 31 is composed of a sun gear 32, a planetary gear 33, and a counter gear 34 disposed between the sun gear 32 and the planetary gear 33, and the sun gear 32 Is rotated on the shaft 29, and the planetary gear 33 and the counter gear 34 are pivoted on the support shafts 35, 36 provided on the swinging arm 30, respectively.

The sun gear 32 is integrally formed with the gear part 32a and the pulley part 32b of larger diameter than this gear part 32a, and this pulley part 32b and the pulley 28 of the motor 27 are formed. The belt 37 is provided in between. The planetary gear 33 is composed of a large diameter gear portion 33a and a small diameter gear portion 33b integrally, and the small diameter gear portion 33b is configured to engage with a rack described later. Further, a circumferential convex portion 33c is formed at the center of the upper surface of the planetary gear 33. The counter gear 34 has the large diameter gear part 34a and the small diameter gear part 34b integrally, and the large diameter gear part 34b is attached to the gear part 32a of the sun gear 32, The small diameter gear part 34b is respectively coupled to the large diameter gear part 33a of the planetary gear 33, whereby the rotation of the sun gear 32 is decelerated via the counter gear 34 to form the planetary gear. And the planetary gear 33 is configured to rotate in the same direction as the sun gear 32.

A protruding piece 30a is formed at the end of the swinging arm 30, and as described later, the protruding piece 30a is rotated to the end of the rocking arm 30 at a predetermined position of the mechanical chassis 2. The drive of the motor 27 is stopped by contacting the provided stop switch 38.

The cylindrical cam member 39 is rotatably supported on the shaft 29 at the lower surface side of the mechanical chassis 2 in correspondence with the swinging arm 30. The cam groove 40 is formed in the outer periphery of the cam member 39, and the cam groove 40 is formed by continuously forming the lower horizontal portion 40a, the inclined portion 40b, and the upper horizontal portion 40c. In the cam groove 40, a coupling pin 19 protruding from the front surface of the chassis 8a to which the base unit is attached is coupled via the roller 19a.

The cylindrical cam member 39 is rotatably connected to the swinging arm 30, that is, the engaging piece 41 is protruded to a predetermined portion of the swinging arm 30, and the engaging piece 41 is lowered. It is bent toward the side and protrudes through the through hole 42 of the mechanical chassis 2 to the lower surface side thereof, and the tip portion thereof is coupled to the engaging portion 43 provided on the upper portion of the cam member 39. As a result, the cam member 39 is rotated integrally with the rotation of the swinging arm 30.

In addition, the cam member 39 is slightly slidable in the axial direction with respect to the shaft 29, and the recess 44 formed at the center of the lower end of the cam member 39 and the stop ring fitted to the lower end of the shaft 29 ( The coil spring 46 is provided between the 45, and the cam member 39 is always pressed upward by the elastic biasing force of the coil spring 46.

On the inner surface side of the disk mounting plate 4 described above, a rack 47 that engages with the planetary gear 33 of the planetary gear mechanism 31 is formed. The rack 47 has a straight rack portion 48 provided in a straight line along the moving direction, that is, the front and rear direction of the disk placing plate 4, and the disk placing plate continuously in front of the straight rack portion 48 ( 4, an arc-shaped rack portion 49 formed by bending the gear inwardly, wherein the arc-shaped rack portion 49 is used to decelerate the disk mounting plate 4 as described later. It consists of the area | region 49a and the chucking area | region 49b used for the lifting operation of the base unit 8, and the brake area | region 49a and the chucking area | region 49b are each formed with the other circular arc.

That is, in the linear rack portion 48 of the rack 47, the small diameter gear portion 33b of the planetary gear 33 of the planetary gear mechanism 31 has the center of rotation of the swinging arm 30 and the planetary gear ( It is formed to be coupled to the rear side with respect to the center line (a) passing through the rotation center of (33), and the chucking area (49b) of the arc-shaped rack 49 is a planetary gear 33 on the extension of the center line (a) Of the small diameter gear portion 33b is coupled, and the brake region 49a is a deformed arc that connects the chucking region 49b to the linear rack portion 48, that is, the linear rack portion 48. It is formed in an arc shape so as to sequentially have a small diameter.

In addition, a guide groove 50 having a shape parallel to the rack 47 is formed on the inner surface side of the disk mounting plate 4, and the planetary gear 33 is formed in the guide groove 50. The convex part 33c of is combined. Then, the swing arm 30 is guided along the guide groove 50, so that the coupling between the planetary gear 33, that is, the small diameter gear portion 33b and the rack 47 is reliably supported.

Moreover, the protruding piece 51 is provided in the inner surface side of the disk mounting plate 4 at the predetermined position of the back part, and the protruding piece 51 is provided in the state which the disk mounting board 4 was moved to the foremost position as mentioned later. The drive of the motor 27 is stopped by contacting the stop switch 52 provided at the predetermined position of the mechanical chassis 2.

In addition, a support plate 53 is fixed to the mechanical chassis 2 so as to extend beyond the disk placement plate 4, and a magnet is provided at the center of the support plate 53 corresponding to the turntable 15 of the base unit 8. The chucking member 54 is attached to be freely rotatable in a horizontal direction.

Next, the operation of the disk loading apparatus of the present example configured as described above will be described. Now, when the disc mounting plate 4 is in the foremost position, that is, the position where the disc drawn out from the disc player can be placed, the planetary gear 33 of the planetary gear mechanism 31 has a linear rack portion 48. It is coupled to the rear side with respect to the center line a as described above at the last end of the. In addition, the roller 19a of the coupling pin 19 of the base unit 8 is coupled to the end of the lower horizontal portion 40a of the cam groove 40 of the cam member 39, which is why the base unit 8 ) Is in the descent position (see also Figure 7A). In the lowering state of the base unit 8, the optical head 12 is locked by the lock arm 22 as described above.

Then, after the disk is mounted in the circular recess 4a of the disk mounting plate 4, the loading / eject button (not shown) of the disk player is operated to rotate the motor 27 in one direction and pulley. The sun gear 32 of the planetary gear mechanism 31 is rotated via the 28 and the belt 37, and the planet gear 33 is rotated via the counter gear 34 by the rotation of the sun gear 32. Is decelerated and rotated. Then, the rotation of the planetary gear 33 is transmitted to the linear rack portion 48 of the rack 47 via the small diameter gear portion 33b so that the disk placing plate 4 is rearward, that is, in the storage direction as shown in FIG. 8A. Move to.

Then, as shown in FIG. 8B, when the disk mounting plate 4 is moved to the end just before being completely stored, the small diameter gear portion 33b (hereinafter simply referred to as the planetary gear) of the planetary gear 33 is moved from the linear rack portion 48. As shown in FIG. The brake gear 49a of the arc-shaped rack portion 49 is bent and coupled to the brake region 49a. Thus, the planetary gear 33 is in a state in which the arc-shaped rack portion 49 acts as an internal gear and is revolving. It rotates and moves along the shape rack part 49. That is, the planetary gear 33 is in a state of moving and engaging with respect to the brake region 49a of the arc-shaped rack portion 49 from the rear side of the center line a from the extension side of the center line a. For this reason, the relative circumferential speed with respect to the arc-shaped rack part 49 of the planetary gear 33 is delayed, and the disc mounting plate 4 is decelerated at the position just before fully received, and the brake which is eased is applied. . On the other hand, the swinging arm 30 is rotated by the moving coupling of the planetary gear 33.

In the state where the planetary gear 33 is coupled to the chucking region 49b beyond the brake region 49a of the arc-shaped rack portion 49, the disk mounting plate 4 is in a completely housed state. While retaining, the planetary gear 33 is engaged with the chucking region 49b of the arc-shaped rack portion 49 as shown in FIG. 8C on the extension side of the center line a, and rotates along the chucking region 49b. Idle). Since the rocking arm 30 is rotated about the shaft 29 according to the rotational movement of the planetary gear 33, the cam member 39 is rotated integrally with the rotation of the rocking arm 30.

The relative movement in the above coupling state of the planetary gear 30 and the rack 47 is such that the convex portion 33c of the rotation center of the planetary gear 33 is coupled to the guide groove 50 parallel to the rack 47. As it is done as a state, there is no fear of disengagement from the previous stroke.

Then, by the rotation of the cam member 39, the roller 19a of the coupling pin 19 of the base unit 8 is guided to the inclined portion 40b of the cam groove 40 and moved to the upper horizontal portion 40c. For this reason, the base unit 8 is rotated in the upward direction so that the optical head 12, the turntable 15, and the like protrude largely from the opening 9 to the upper surface side of the mechanical chassis 2, and at the same time, the chassis to which the base unit is attached is attached. (8a) is coupled to the lower surface of the mechanical chassis 2 (see also 7B). In the ascending operation of the base unit 8 by the cam member 39, the cam member 39 has the planetary gear 33 of the planetary gear mechanism 31 as described above. By rotating through the swinging arm 30 only in the state moving along the chucking area 49b of the arc-shaped rack 49, the base unit can be sufficiently formed even in the small cam member 39 at a small diameter as in this example. 8) can be driven up.

Further, in the ascending operation of the base unit 8, moving from the inclined portion 40b of the cam groove 40 of the roller 19a of the engaging pin 19 of the base unit 8 to the upper horizontal portion 40c. The chassis 8a to which the base unit is immediately attached is configured to be coupled to the lower surface of the mechanical chassis 2, so that the cam member is engaged in the state where the roller 19a is coupled to the upper horizontal portion 40c of the cam groove 40. 39 is in a state of moving downward in response to the biasing force of the coil spring 46. For this reason, the base unit 8 is pressed against the lower surface of the mechanical chassis 2 due to the biasing force of the coil spring 46, so that noise and the like are stably supported at the raised position.

In this way, the base unit 8 is lifted up so that the optical head 12 and the turntable 15 are inserted downward into the insertion opening 4b of the disk mounting plate 4, whereby the circular shape of the disk mounting plate 4 is formed. The disk arranged on the recess 4a is placed on the turntable 15 so that the disk is chucked by the suction of the chucking member 54 against the turntable 15.

In addition, as the base unit 8 rises, the lock of the optical head 12 is released as described above.

In this way, the base unit 8 is raised, and when the planetary gear 33 is rotated to the end of the arc-shaped rack portion 49, the protruding piece 30a of the swinging arm 30 stops 38. ), The driving of the motor 27 is stopped, the driving of the planetary gear 31 is stopped, and the base unit 8 is fixed to the mechanical chassis 2.

In this state, the planetary gear 33 is held at the position coupled to the end of the arc-shaped rack portion 49, and the planetary gear 33 is applied even if a force in the drawing direction is applied to the disk mounting plate 4 from the outside. Since the disk mounting plate 4 is kept locked in the storage position and rotation of the cam member 39 is also prevented, the base unit 8 is supported in the raised position.

Thus, by operating the play button of the disc player, the spindle motor 14 is driven to rotate the disc by the turntable 15, and the optical head 12 is operated by the linear motor 13 to perform regeneration.

In the case of ejecting the disc after the disc reproduction is finished, the motor 27 is rotated in the opposite direction to the above loading and chucking operation by operating the loading / eject button of the disc player, whereby the disc is rotated in the opposite direction to the chucking operation. When the base unit 8 is lowered by the operation, the disk placing plate 4 moves forward, and the disk placing plate 4 moves to the foremost dispensing position, the protruding piece 51 moves to the stop switch ( 52, the drive of the motor 27 is stopped by this, and the forward movement of the disk mounting plate 4 is stopped.

The ejection operation of the disk mounting plate 4 in the ejection operation is at an initial stage, i.e., in the state where the planetary gear 33 of the planetary gear mechanism 31 moves the arc portion 49 of the rack 47 in a coupled manner. If the linear rack portion 48 is engaged with the planetary gear 33, it is performed at a predetermined high speed.

In addition, the disc player provided with the apparatus of the present embodiment configured as described above is configured to lock the optical head 12 by a special operation at the time of factory shipment. That is, in the present apparatus, since the optical head 12 is configured to be driven to move by the linear motor 13, the optical head 12 is movable through the slider 11 in the non-energized state of the linear motor 13, and during transportation. In order to prevent the slider 11 from moving by inertia and colliding with the yoke or the like of the linear motor 13 at the moving end, the slider 11 can be locked at the factory.

Referring to the locking step of the optical head 12, first, the power supply of the disk player is turned ON, the disk mounting plate 4 is drawn out by operating the loading / eject button, and the circular recess 4a. When the disk mounting plate 4 is accommodated from above the disk position and by operating the loading / eject button, the base unit 8 is raised to chuck the disk as described above in conjunction with the storing operation. When the chucking operation is completed, the optical head 12 is moved to the foremost position, i.e., the innermost circumferential position of the disc, by the instruction of the microcomputer, and the optical head 12 reads out the signal recorded at the innermost circumference of the disc. The display is operated so as to display on the display unit of the disc player.

After checking whether the disc loading operation, the chucking operation, and the signal reading operation are performed in this manner, the loading / eject button is operated again to move the disc placement plate 4 in the ejecting direction, as described above. ) Is descended. The lock arm 22 engages with the engagement recessed portion 21 of the slider 11 at the foremost position as described above in accordance with the drop of the base unit 8, and the optical head 12 is locked.

Then, after the disk is taken out of the disk placing plate 4 in the pulled out state, the power is turned off, and the disk placing plate 4 is pushed in by hand in this state. In the operation of manually pressing the disk mounting plate 4 from the pull out position to the storage position, the planetary gear 33 has a brake area of the arc rack portion 49 at the rear end of the linear rack portion 48. The engagement position is moved up to 49a), but not more than that, that is, the planetary gear 33 is not engaged up to the chucking region 49b of the arc-shaped rack portion 49. For this reason, since the cam member 39 is hardly rotated, the base unit 8 will be in the state which is supported by the dropping position. That is, the base unit 8 is in the lowered position while the disc placing plate 4 is in the retracted position, and the optical head 12 is set in a special state that is locked. The optical head 12 moves unpredictably and is not damaged.

After the user purchases the disc player, the normal operation is performed as described above by turning the power ON, and the lock of the optical head 12 is released by the rise of the base unit 8, so that the user Disc players can be used without requiring special unlocking operations.

As mentioned above, although the Example of this invention was described, this invention is not limited to this Example, It can change variously in the range which does not deviate from the meaning of this invention.

For example, even if the arc-shaped rack portion of the rack is formed in an approximately S-shape in which the chucking region bends in the reverse direction, the same operation as in the above-described embodiment can be performed.

As described above, in the disk loading apparatus of the present invention, the disk mounting plate is moved in a state in which the planetary gear is engaged with the linear rack portion, and in the state in which the planetary gear is engaged in the arc rack portion, Since the deceleration and the elevating operation of the disc supporting means are performed, the elevating operation of the disc supporting means is performed by rotating the cam means by the rotational movement of the planetary gear along the arc-shaped rack portion. As compared with the configuration performed by the direction change movement in the linear direction and the orthogonal direction, the ascending and descending is smooth and reliable, and thus stable chucking operation is performed. In addition, since the disc placement plate is decelerated near the storage position, the impact when the disc placement plate comes into contact with the frame is greatly reduced, thereby reducing the impact noise and preventing the disc placed on the disc placement plate from running out. It is prevented, and also the operation feeling becomes favorable by accelerating and decelerating a disk arrangement plate.

By providing the guide means for guiding the swinging arm in accordance with the rack portion on the disk placing plate, the planetary gear reliably supports the engaged state with respect to the rack portion, and the planetary gear and the rack even if distortion occurs in the disk placing plate. No combination of wealth falls.

In addition, the cam means is pressurized in the upward direction so that the disc holding means is pressed against the fixed portion at the rising position to be reliably supported without generating noise, so that stable disc regeneration is performed.

Claims (3)

A disk mounting plate which is supported on the chassis inside the frame so as to be movable in the withdrawal / storage direction with respect to the frame, and the disk is disposed; A rack provided on the disk placement plate side and provided with a linear rack portion formed in a straight line in accordance with a moving direction of the disk placement plate and an arc-shaped rack portion continuously bent in the linear rack portion; A sun gear installed on the chassis side and rotationally driven by a motor; A planetary gear engaged with the rack and rotated by rotation of the sun gear, A swinging arm for rotatably supporting the planetary gear about the sun gear; Disk support means which is supported on the chassis so as to be lifted and lowered and chucks the disk in a raised position; A cam means, which is integrally rotated with the oscillating arm and which lifts and operates the disk support means, In the state where the planetary gear is engaged with the linear rack portion, the disk arranging plate is moved, and in the state where the planetary gear is engaged with the arc-shaped rack portion, the cam support means is supported by the cam means. A disk loading apparatus, characterized in that the lifting operation of the structure is performed. The disk loading apparatus according to claim 1, wherein the disk mounting plate is provided with guide means for reliably supporting the engaged state of the planetary gear to the rack along the rack. The disk loading apparatus according to claim 1, wherein the cam means is spring-biased in the upward direction.