JP3403369B2 - Disc loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk loading device having a function of moving a disk to a clamp position. 2. Description of the Related Art Devices for performing operations such as recording and playback using various types of disks such as compact disks and video disks have recently become widespread. [0003] When loading a disk in this type of equipment, various automatic mechanisms for pushing a disk tray on which the disk is loaded into the equipment body and then clamping the disk have been proposed. [0004] In such a device,
It is required that the mechanism for moving the disk tray and clamping the disk be simple and that the operation be switched reliably. According to the first aspect of the present invention, there is provided a disk loading apparatus comprising: a tray (23) for transporting a stored disk; and a clamping mechanism (4, 11, 32, 51) for clamping the disk. , 57, 60, 61,
62, 63...) And a common drive source (40, 47...) For transporting the tray and for the clamping mechanism, and selectively performing tray movement and disk clamping operation, The tray has a first gear (28) that operates by receiving the driving force of the driving source, and the clamp mechanism includes a second gear (54) that operates the clamping mechanism by receiving the driving force of the driving source. Having the first
The gear and the second gear are configured to take two states, a meshing state in which the driving force of the driving source is transmitted and a non-meshing state in which the driving force is not transmitted, and one of the first gear and the second gear. Interlocking mechanism (2) that operates the other according to the operation of
9, 55, 64, 65, 66), wherein the interlocking mechanism changes the second gear from the non-meshing state to the meshing state in response to the operation of the first gear in the meshing state, The first gear and the second gear are both brought into the meshed state, and the first gear is moved from the meshed state to the non-meshed state according to the operation of the second gear in the meshed state. It is characterized by the following. Hereinafter, the present invention will be described in detail with reference to the drawings by way of embodiments. 1 to 4
Shows the entire disc loading device. As shown in these figures, cylindrical positioning portions 3, 3,... For positioning the pickup main body 2 are provided upright in the middle of the casing 1 of the disc loading device having the tray insertion window 1a. A slide bush 5 urged upward by a spring 4 is inserted into each positioning portion 3, and a locking claw formed at a lower end portion of the slide bush 5 on a locking piece 6 of the positioning portion 3. The engagement of the lock 7 prevents the slide bush 5 from being detached (see FIGS. 3 and 4). A big up base 8 is attached to each slide bush 5 through bush engagement holes 9, 9,... Of a pickup base 8 on which a pickup and the like described later are mounted. A motor 12 having a turntable 11 fixed to a shaft 10 is attached to the pickup base 8.
In the vicinity of the motor 12, support members 13, 13 are provided upright, and the support members 13 have a slide shaft 14 having a male screw.
Are mounted so that both ends of the can be freely rotated. The slide shaft 14 is rotated by a driving force from a stepping motor 17 obtained through a pulley 15 and a belt 16, and the function of the stepping motor 17 causes a pickup head to be described later.
The movement of the nineteen discs to a predetermined track position is accurately performed. The slide shaft 14 is provided with a pick-up head 19 movably along the axial direction of the slide shaft 14 via a support portion 18 having a female screw. Note that a concave guide portion 20 is provided at the other end of the pickup head 19, and the guide portion 20 is locked to a guide piece 21 of the pickup base 8. The pickup head 19 is constantly urged toward the turntable 11 with respect to the support portion 18 by a spring 22 arranged in a vertical direction. Thus, by disposing the springs 22 in the vertical direction, the space required for the springs 22 can be reduced. At the upper part of the pickup body 2, a tray 23 for transporting the stored disk to the loading position is arranged so as to be movable in the directions of arrows a and b. On the upper surface side of the tray 23, a disk storage portion 24, a disk ejection groove 25, a window 26 for viewing the disk recording surface, and a stopper 27 that abuts a projecting piece 34 protruding from a peripheral portion of a support bridge 33 described later. , 27 are provided. On the other hand, a guide groove 30 having a rack gear 28 and a cam portion 29 meshing with a pinion gear 40 described later is provided on the lower surface side of the tray 23. The rack gear 28 is provided with a toothless portion 28a as a retracting portion for the pinion gear 40. Between the guide groove 30 and the rack gear 28 on the lower surface side of the tray 23, a tapered portion 3 for rotating a swinging piece 38 of a changeover switch 37 described later at the unload position to the arrow c, d side.
1 is provided. Above the tray 23, an insulator 32a
A support bridge 33 that rotatably supports the magnet clamper 32 on which is fixed is disposed, and the position of the magnet clamper 32 is overlapped with the above-mentioned turntable 11 at the time of loading when the clamping operation is completed. Position. A loading mechanism 35 is provided near the pickup body 2. The loading mechanism 35 is provided with a changeover switch 37 for switching on / off the driving of a drive motor 47 to be described later.
When the rocking piece 38 of 37 rotates in the directions of arrows c and d,
The on / off of the drive motor 47 and the switching of the system direction of supply of positive or negative power are performed. The rocking piece
The turning power to 38 is supplied to the taper portion 31 of the tray 23 or a taper portion 52a formed at an end of a slide member 52 described later.
Given by A large gear 41 having a shaft 39 is rotatably arranged near the changeover switch 37, and a pinion gear 40 is mounted on the shaft 39. In the vicinity of the large gear 41,
A pulley 43 and a small gear 44 attached to the shaft 42 are provided, and the large gear 41 meshes with the small gear 44. In the vicinity of the pulley 43, a small pulley is
A drive motor 47 equipped with 46 is provided.
The driving force from 47 is transmitted to the pulley 43 via the small pulley 46 and the belt 48. In the vicinity of the drive motor 47, there is provided a slide member 51 which moves in the directions of the arrows a and b along the engagement projections 50, 50 erected on the set surface 49. In the slide member 51,
A slide portion 52 and a rectangular piece portion 53 are provided. The slide portion 52 is a cam portion that displaces a rack gear 54 that meshes with the pinion gear 40 and an engagement pin 64 of a gear switching member 66 described below.
A guide groove 56 having 55 is formed. The rack gear 54 is provided with a retracting portion 52a for the pinion gear 40. The rectangular piece 53 has a cam groove 57 and a guide groove 58 for pushing down the pickup body 2 at the loading position to the unloading position.
The guide groove 58 of the rectangular piece 53 is engaged with a pin 58a protruding from the inner surface of the housing 1, and the slide member 51 is guided by the pin 58a. In the vicinity of the slide member 51, there are provided support members 59, 59 protruding from the inner surface of the housing 1, and these support members 59 are engaged with the ends of the pickup base 8. A swing lever 62 having a fitting pin 61 fitted in the cam groove 57 of the stop member 60, 60 and the slide member 51 is mounted to be rotatable about a rotation shaft 63. In the vicinity of the pinion gear 40, a gear switching member 66 having engagement pins 64 and 65 is disposed so as to be movable in the directions of arrows e and f. And one engagement pin
65 is the guide groove 30 of the tray 23 and the other engagement pin 64
Are fitted in the guide grooves 56 of the slide portion 52, respectively, and the meshing between the pinion gear 40 and the rack gears 28, 54 can be switched by moving the gear switching member 66 in the directions of arrows e and f. ing. The operation of the disk loading apparatus having such a configuration will be described with reference to FIGS. First, in the initial state of the loading operation, the tray 23 is at the position shown in FIG. In this state, the pinion gear 40 and the rack gear 54 of the slide portion 52 are in mesh with each other,
Further, the pinion gear 40 is connected to the rack gear 28 on the tray 23 side.
In the missing tooth portion 28a. At this time, the fitting pin 61 of the swing lever 62 fitted in the cam groove 57 is at the position A. At this time, the swinging piece 38 of the changeover switch 37 is pressed by the tapered portion 52a of the slide portion 52, rotates in the direction of arrow d, and electrically detects that the loading is completed. When shifting from this state to the unload state, when an eject button (not shown) is operated,
Similarly, a drive current is supplied to the drive motor 47 from a control unit (not shown). As a result, the drive shaft 45 of the drive motor 47 rotates clockwise, and the driving force of the drive motor 47 is transmitted to the small gear 44 via the belt 48 and the pulley 43, and the large gear 41 meshing with the small gear 44 Rotates counterclockwise.
Accordingly, the pinion gear 40 rotates in the same direction. The rotation of the pinion gear 40 causes the slide member 52 to move in the direction of arrow a via the rack gear 54 meshing with the pinion gear 40. At this time, the fitting pin 61 of the swing lever 62 fitted in the cam groove 57 of the rectangular piece 53 is displaced from the position A to the position B along the cam groove 57 (the state of FIG. 6). At this time, the swing lever 62 rotates with the displacement of the fitting pin 61, and further the swing lever 62
As the rotation of 62 advances, the locking portion 60 at a position away from the end of the pickup base 8 comes into contact with the end. Then, the locking portion 60 of the swing lever 62 is locked to the end of the pickup base 8, and the pickup body 2
Is pressed down while keeping the horizontal state downward against the urging force of the spring 4 in the slide bush 5. Further, at this time, the cam portion 55 of the guide groove 56 of the slide portion 52 displaces the engaging pin 64 of the gear switching member 66 to the arrow f side, and moves the gear switching member 66 in the same direction. Thus, the engagement pin 65 of the gear switching member 66
Is displaced, and the tray 23 is slightly moved in the direction of arrow b via the cam portion 29 of the guide groove 30 of the tray 23. As a result, the rack gear 28 of the tray 23 meshes with the pinion gear 40. On the other hand, the rack gear 54 side of the slide portion 52
The pinion gear 40 is disengaged by the position of the pinion gear 40 in the retreat portion 52a (the state of FIG. 7). At this time, the drive shaft 45 of the drive motor 47 continues to rotate, and the tray 23 moves in the direction of arrow b via the pinion gear 40 and the rack gear 28. When the tray 23 moves in the direction of arrow b and moves immediately before the unloading position, the tapered portion 31 of the tray 23 rotates the swinging piece 38 of the changeover switch 37 in the direction of arrow c. As a result, the supply of power to the drive motor 47 is cut off. Further, when the tray 23 moves in the direction of the arrow b, each stopper 27 of the tray 23 comes into contact with the projecting piece 34 of the support bridge 33, whereby the movement of the tray 23 stops (the state of FIG. 8). Subsequently, after the disk D is stored in the disk storage section 24 of the tray 23 in the state of FIG. 8, ie, in the unloading state, when the play button (not shown) is operated, the drive motor 47 is moved to the above-mentioned state. An opposite phase (eg, negative phase) current is supplied. Then, the drive motor 47 performs rotation (counterclockwise) opposite to the above rotation. The driving force of the driving motor 47 causes the driving shaft
When 45 rotates counterclockwise, the small pulley 46 and the belt 48
, The pulley 43 rotates in the same direction, and the large gear 41 meshing with the small gear 44 located below the pulley 43 rotates clockwise. As a result, the pinion gear 40 rotates in the same direction, and the tray
23 moves in the direction of arrow a (state of FIG. 8). When the tray 23 moves to just before the loading position, the cam 29 of the guide groove 30 of the tray 23 displaces the engaging pin 65 of the gear switching member 66 in the direction of arrow f. Accordingly, the other engagement pin 64 is displaced in the same direction by moving the gear switching member 66 in the same direction. As a result, the slide portion 52 is moved by the arrow through the cam portion 55
The rack gear 54 of the slide portion 52 moves slightly in the direction b, and meshes with the pinion gear 40 (the state shown in FIGS. 7 and 8). At this time, the pinion gear 40 is in the retracted portion 28a of the rack gear 28.
And the rack gear 28 and the pinion gear 40 are disengaged from each other. Next, the slide portion 52 moves in the direction of arrow b via the rack gear 54 and the pinion gear 40. At this time, the fitting pin 61 of the swing lever 62 is displaced along the cam groove 57 of the rectangular piece 53 and moves from the position B to the position A. Along with this, each locking portion 60 is displaced upward by swing lever 62 rotating in the direction of arrow g. With the displacement of the locking portions 60, the suppression of the biasing force by the spring 4 in the slide bush 5 is released, and the pickup base 8 is pushed upward by the biasing force. By such an operation, immediately before the pickup main body 2 reaches the uppermost position as the loading position, the turntable 11 comes into contact with the center portion of the disk D and pushes the disk D upward. When the pickup main body 2 reaches the loading position, the center of the disk D is clamped by the magnet clamper 32 (the state shown in FIG. 5). At this time, the pickup base 8 is horizontally supported by the four slide bushes 5 urged by the springs 4, so that the disk D is horizontally clamped. Thereafter, the positioning of the pickup head 19 is performed simultaneously with the rotation of the motor 12, and the reproduction of information from the disk D is performed. As a result, the distance between the pickup head 19 and the disc D is kept constant as compared with the case where the pickup base 8 is supported in a cantilever manner, so that the information can be reliably reproduced. As described above, in the present embodiment, the pickup base is moved in the vertical direction while maintaining the horizontal state by the loading mechanism provided on one side, so that the disc is reliably prevented from being mis-clamped. Can be clamped in place. Further, since only one loading mechanism is required, the loading mechanism is mechanically simple without the need for a special cam mechanism, so that manufacturing costs can be reduced and maintenance can be facilitated. Further, since the pickup base is supported by the urging means having an anti-vibration function, it is possible to obtain a disk device having a sufficient resistance to an external impact. In this embodiment, the slide member 51 and the swing lever 62 constitute a lift control means. However, the present invention is not limited to this, and may employ a lifting / lowering regulating means having both functions. The slide member 51 and the swing lever 62 may be integrated to constitute an elevating control means. As described above, according to the present invention, by providing the structure according to the first aspect, it is possible to accurately carry out the movement of the tray and the operation of the clamp mechanism by the common drive source. The operation can be performed at an appropriate timing, and erroneous clamping of the disk can be prevented. [0043]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a disc loading device according to the present invention. FIG. 2 is an exploded perspective view showing the disc loading device of FIG. FIG. 3 is a side view showing a main part of the disc loading device of FIG. 1; FIG. 4 is a side view showing a main part of the disc loading device of FIG. 1; FIG. 5 is a diagram for explaining the operation of the disc loading device of FIG. 1, showing a loading state. FIG. 6 is a diagram for explaining the operation of the disc loading device of FIG. 1, showing a process up to an unloading state. FIG. 7 is a diagram for explaining the operation of the disc loading device of FIG. 1 and shows a process up to an unloading state. FIG. 8 is a diagram for explaining the operation of the disc loading device of FIG. 1, showing a process up to an unloading state. FIG. 9 is a diagram for explaining the operation of the disc loading device of FIG. 1, showing an unloading state. [Description of Signs] 1 ... Case 2 ... Pickup body 4 ... Spring 5 ... Slide bush 8 ... Pickup base 11 ... Turn table 12 ... Motor 13 ... Support member 14 ... Slide shaft 15 ... Pulley 16 ... Belt 17 ... Stepping motor 19 … Pickup head 20… guide part 22… spring 23… tray 24… disk storage part 25… disk take-out groove 26… loading window 27… stopper ridge 28… rack gear 29… cam part 30… guide groove 31… taper part 32… clamper 33 ... Support bridge 35 ... Loading mechanism 37 ... Changeover switch 38 ... Swinging piece 40 ... Pinion gear 41 ... Large gear 43 ... Pulley 44 ... Small gear 47 ... Drive motor 48 ... Belt 51 ... Slide member 52 ... Slide part 53 ... Rectangle piece 54 ... rack gear 55 ... cam portion 56 ... guide groove 57 ... cam groove 58 ... guide groove 62 ... swing lever 64, 65 ... engagement bin 66 ... gear switching member D ... disk

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A 63-52163 (JP, U) JP-A 1-124956 (JP, U) JP-A 62-67385 (JP, U) Patent 3026983 (JP, U) B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) G11B 17/04

Claims (1)

(57) [Claims 1] A tray (2) for transporting a stored disk
3) and a clamping mechanism (4, 11, 3) for clamping the disc.
, 51, 57, 60, 61, 62, 63...) And a common drive source (40, 47. A tray loading device, wherein the tray operates by receiving a driving force of the driving source.
A gear (28), wherein the clamp mechanism has a second gear (54) that operates the clamp mechanism by receiving a driving force of the drive source, and wherein the first gear and the second gear are It is configured to take two states, a meshing state in which the driving force is transmitted and a non-meshing state in which the driving force is not transmitted, and an interlock that operates the other of the first gear and the second gear according to the operation of the other. Mechanism (29, 55, 64, 65, 66)
The interlocking mechanism changes the second gear from the non-meshed state to the meshed state in accordance with the operation of the first gear in the meshed state, and sets the first gear and the second gear. A disc loading device, wherein the first gear is changed from the meshed state to the non-meshed state in accordance with the operation of the second gear in the meshed state. .