JPH0614320Y2 - Disc loading device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a disc loading device for a disc player, which has a structure in which a signal reproducing unit is vertically rotated in association with a slider during a loading or unloading operation. In the disc player, this is devised so that the operation timing of the slider and the tray does not get out of order.

(Prior Art) In the conventional disk loading device having a structure in which the signal reproducing unit is rotated upward to press the turntable into pressure contact with the clamper, the rotating tip of the signal reproducing unit is supported at one point by the cylindrical cam. However, it was vulnerable to impact during handling, etc., and the support was unstable.

Therefore, the applicant provided a cam portion at least at two positions in the left-right direction on a slider that slides in the left-right direction on the chassis, and engages the rotating tip of the signal reproducing portion with the cam portion, particularly in the left-right direction. We have separately proposed a disc loading device designed to stabilize the support.

(Problems to be Solved by the Invention) In the case of the above-mentioned applicant's proposal, a slider that slides in the left-right direction and a tray that moves in the front-rear direction are continuously moved to predetermined positions at predetermined timing by a drive gear. , Then you have to stop.

It is an object of the present invention to provide a mechanism in which the timing of the movement of the slider and the tray can be performed without deviation.

(Means for Solving the Problems) According to the configuration of the present invention for achieving the above object, a tray is moved by a drive gear for loading or unloading between a disc ejecting position and a reproducing position, and is vertically moved to a chassis. The signal reproduction unit that is rotatably provided
In the disc loading device having a structure in which the turntable moves upward so as to be pressed against the clamper after the tray stops at the time of loading by the cam portion of the slider that interlocks with the drive gear, and moves downward before moving the tray at the time of unloading, A slider lock mechanism for locking the slider at the signal reproducing portion lowering position and a tray lock mechanism for locking the tray at the reproducing position are provided except when the tray is at the reproducing position.

The slider lock mechanism is provided on a ring-shaped wall portion which is provided in the drive gear in a circular shape and has a notch, and a protrusion and a slider which are provided on the slider so as to contact the inner peripheral surface of the ring-shaped wall portion. The tray lock mechanism is composed of a guide hole provided and a guide pin provided so as to abut on the rear end portion of the guide hole, and the tray lock mechanism is provided with a circular arc-shaped stopper concentrically provided on the drive gear and a tray. And a protrusion having a notch which can be engaged with the stopper.

(Function) Since the slider is locked at the signal reproducing section lowering position by the slider lock mechanism in addition to when the tray is at the reproducing position, the signal to be performed after the tray reaches the reproducing position and stops during the loading operation. The movement of the slider for the upward movement of the playback section will be started exactly,
During the unloading operation, the slider is locked at a predetermined signal reproducing unit lowering position before the signal reproducing unit has finished moving downward and the tray has moved, so that the preparation for the next loading operation is completed. Become.

When the tray reaches the reproduction position, the tray is locked by the tray lock mechanism, so that the disc is transferred from the tray to the turntable when the signal reproducing unit moves during the loading operation, and when the unloading operation is performed. The transfer operation of the disc from the turntable to the tray due to the downward movement of the signal reproducing unit is accurately performed without positional deviation.

Further, by the tray lock operation, the timing of the operation of the slider and the movement of the tray becomes accurate.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1, FIG. 3, FIG. 5 are plan views, front views and side views of the main part of the disc loading device in the tray open state.
In the figure, a plan view of the playback position in the tray closed state,
A front view and a side view are shown in FIGS. 2, 4, and 6, respectively.

An optical pickup 21 and its feed servo mechanism 22, a signal reproducing section 25 mainly composed of a turntable 23 and a disk motor 24 are attached to a plate 26 having a rectangular shape in plan view,
The plate 2 is inserted into the rectangular hole 28 formed in the chassis 27.
6 is a position where it is loosely fitted in a plan view, and the base portion 26a of the plate 26 is attached to the chassis 27 via the leaf spring 29 attached to the base portion 26a of the plate 26, and the chassis 27 is moved in the left-right direction (vertical direction in FIG. ) To the cam portions 31, 31 of the slider 30 (shown by the dotted line in FIGS. 1 and 2 and the solid line in FIGS. 3 to 6) slidably on the rotary tip portion 26b of the plate 26. The plate 26 is supported by the chassis 27 so as to be vertically rotatable by fitting the two attached left and right cam pins 32, 32 and by deforming the spring 29.

The tray 34 that conveys the disc 33 is movable in the front-rear direction (left-right direction in FIG. 1) by being guided by the tray guide 35 provided on the side portion of the chassis 27, and the tray 34 is moved by the loading gear mechanism 36 and the loading motor 37. 34 is moved between the disc ejecting position of FIG. 1 and the reproducing position of FIG.

That is, the tray rack 38 provided on the lower surface side of the tray 34.
However, when the drive gear 39 of the loading gear mechanism 36 meshes with the large gear portion 39a of the drive gear 39, the drive gear 39 rotates counterclockwise to move the tray 34 from the disc eject position (tray open position) toward the reproducing position (tray close position). When the loading gear is moved and the drive gear 39 is rotated clockwise, the unloading movement is performed from the tray closed position toward the tray open position.

The clamper 41 is attached to the gate-shaped frame 40 erected from the chassis 27, and after the tray 34 is closed, the disc 33 on the turntable 23 rises together with the plate 26 and is pressed against the turntable 23 and the clamper 41. Before the loading operation, the disc 33 moves downward.

The vertical rotation operation of the plate 26 is performed in accordance with the loading movement or the unloading movement of the tray 34, and the signal reproducing section elevating mechanism M for this purpose has the small gear section 39b of the drive gear 39. And the slider 30 provided with the slider rack 42 capable of meshing with the small gear portion 39b, and the rotating tip portion 26 of the plate 26.
The at least two cam pins 32, 3 provided in b
The cam portion 3 provided on the slider 30 so as to engage with 2.
1 and 31.

The illustrated slider 30 is in a front view as shown in FIG. 3, in which a horizontal piece 30a is formed with guide holes 44, 44 for engaging guide pins 43, 43 attached to the chassis 27, and a vertical piece 30b. In the above, inclined cam grooves 45, 45 are formed as the cam portion 31 that engages with the cam pin 32.

As shown in FIG. 2, the tray rack 38 is provided in the longitudinal direction of the tray 34 except for a part on the inlet side (left side) of the tray 34, and the tray 34 is provided between the tray open position and the tray close position. At some time, the tray rack 38 always meshes with the large gear portion 39a, and when the drive gear 39 continues to rotate in the tray closing direction (counterclockwise in FIG. 2) after reaching the tray close position, the large gear portion 39a will move to the tray. A large gear portion 39a having a toothless portion 39c is formed so as to be separated from the rack 38.

The slider rack 40 is provided only on the front side of the slider 30, and when the tray 34 does not reach the tray closed position, the slider 30 stops at the standby position on the front side as shown in FIG. When the drive gear 39 reaches the position where the tray 34 reaches the tray close position and the large gear portion 39a disengages from the tray rack 38, when the drive gear 39 is out of the small number of small gear portions 39b, the small gear portion 3
9b starts to mesh with the slider rack 40, and the drive gear 39
Is continuously rotated in the tray closing direction, the slider 30 slides to the back side (upward in FIG. 1, leftward in FIG. 5), and the drive gear 39 stops at the reproduction position in FIG.
The small gear portion 39b and the slider rack 40 remain engaged with each other.

When the slider 30 is at the standby position in FIG. 1, the cam pins 32, 32 are engaged with the lower horizontal portion 45a of the cam groove 45 as shown in FIG. At the lowest position, the turntable 23 is located below the clamper 41 as shown in FIG.

When the slider 30 is in the reproducing position shown in FIG. 2, the cam pins 32 and 32 are engaged with the upper horizontal portion 45b of the cam groove 45 and the rotating tip portion 26b is at its highest position as shown in FIG. As described above, the disc 33 rides on the turntable 23 and is pressed by the clamper 41.

While the tray 34 is moving, the slider 30 arbitrarily moves to cause the meshing position shift between the small gear portion 39b and the slider rack 40, and the predetermined operation of the slider 30 is performed after the tray 34 is stopped at the reproducing position. In order to prevent a timing misalignment accident such as the absence of a slider, a slider lock mechanism R ₁ is provided to lock the slider 30 to the signal reproducing portion lowering position in addition to the tray 34 being in the reproducing position.

As shown in FIG. 10, the illustrated slider lock mechanism R ₁ is provided on the lower surface of the drive gear 39 and a ring-shaped wall 47 having a notch 47 a provided concentrically therewith, and on the upper surface of the slider 30. The protrusion 48 is composed of the guide pin 43 of the slider 30 and the rear end portion 44a of the guide hole 44, and the protrusion 48 is formed between the tray open position and the tray close position as illustrated in FIG. The slider 30 is in contact with the inner side (reproduction position side) of the inner peripheral surface of the ring-shaped wall 47, and at this standby position, the slider 30 cannot move to the front side due to the above contact, and the guide pin 43 has the inner end portion of the guide hole 44. When the tray 34 comes into contact with the tray 44a and does not move to the back side and reaches the tray closed position, the ring-shaped wall 47 has the cutout portion 47 as shown in FIG.
Since a is located in front of the protrusion 48 in the traveling direction, the slider 30 has a structure capable of moving to the rear side.

When the tray 34 is in the tray closed position, the tray 3
In order to prevent an accident in which the disc 4 moves freely and the transfer operation of the disc 33 between the tray 34 and the turntable 23 is not properly performed, a tray lock mechanism R ₂ for locking the tray 34 at the reproduction position is provided. Provided.

The illustrated tray lock mechanism R ₂ is, as shown in FIG.
The drive gear 39 includes a stopper 49 having a circular arc shape in a plan view, which is concentrically provided with the drive gear 39, and a protrusion 50 having a notch 50a provided in the longitudinal direction on the lower surface of the tray 34. Is in the tray close position, the stopper 49 enters the notch portion 50a and engages,
Due to this engaging action, the tray 34 cannot move (second
In the figure), the above-mentioned engagement is not performed at positions other than the tray closed position, so that the tray 34 has a structure that can be moved by the large gear portion 39a of the drive gear 39.

In the illustrated example, the plate 26 is attached to the chassis 27 via a leaf spring 29 and an upper plate 26c to which a signal reproducing unit 25 such as an optical pickup 21, a feed servo mechanism 22, a turntable 23 and a disk motor 24 is directly attached. It is divided into a lower plate 26d to be attached,
The upper plate 26c is elastically supported by the elastic members 51 attached to the corners.

The illustrated feed servo mechanism 22 includes a pickup feed motor 52 and a pinion rack mechanism 53 driven by the pickup feed motor 52.
The optical pickup 21 is moved along the guide rod by.

Next, the above operation will be described with respect to the loading operation.

When the tray 34 is in the tray open position, that is, the disc take-out position (FIGS. 1, 3, and 5), the slider 30 is used.
Is located on the front side, the cam pin 32 is engaged with the lower horizontal portion 45a, the plate 26 and the signal processing unit 25 are lowered, and the turntable 23 is separated from the clamper 41.

The slider 30 does not move because the protrusion 48 is in contact with the ring-shaped wall 47 of the drive gear 39 and the guide pin 43 is in contact with the rear end portion 44a of the guide hole 44 of the chassis 27.

When a loading button (not shown) is pressed, the loading motor 37 rotates counterclockwise in FIG. 1 and the drive gear 39 rotates counterclockwise, and the large gear 39a moves the tray 34 toward the tray close position via the tray rack 38. 1 Move to the right in the figure.

When the tray 34 reaches the tray closed position shown in FIG. 2 (FIG. 7), the large gear portion 39a is disengaged from the tray rack 38 and becomes a section of the toothless portion 39c, so that the tray 34 is stopped. The stopper 4 is provided on the notch 50a of the ridge 50.
Since the tip portion 49a of 9 enters, the tray 34 will be
It doesn't move.

On the other hand, since the notch 47a of the ring-shaped wall 47 is located in front of the protrusion 48 of the slider 30 in the traveling direction, the slider 30 can be moved to the rear side, and the small gear 39b of the drive gear 39 is moved to the slider rack. When the drive gear 39 continues to rotate counterclockwise, the slider 30 starts moving to the back side.

With this movement of the slider 30, the cam pin 32 enters the inclined portion of the cam groove 45 and slides upward to move the plate 26.
The disc 33 is transferred from the tray 34 to the turntable 23 by the ascending turntable 23.

When the cam pin 32 enters the upper horizontal portion 45b of the cam groove 45 and reaches a predetermined position, an operating piece (not shown) provided on the drive gear 39 closes the stop switch, and the loading motor 3
7 stops.

At this time, the disc 33 is pressed by the clamper 41, and the loading operation is completed.

The unloading operation is performed in the reverse order of the loading operation, and each member operates in the opposite direction.

That is, when the unloading button is operated, the loading motor 37 rotates clockwise in FIG. 2, the small gear portion 39b moves the slider 30 to the front side through the slider rack 42, and the cam pin 32 descends the inclined portion of the cam groove 45. Then, the plate 26 and the signal reproducing section 25 descend and the turntable 2
3 and the disc 33 come off the clamper 41, and the cam pin 3
When 2 enters the lower horizontal portion 45a and reaches a predetermined position, the small gear portion 39b is disengaged from the slider rack 42, and the slider 30 stops.

At this time, the protrusion 48 of the slider 30 is inserted into the ring-shaped wall 47 through the notch 47a as shown in FIG.
When the drive gear 39 continues to rotate to the right, the inner peripheral surface of the ring-shaped wall portion 47 comes into contact with the protrusion 48, the guide pin 43 contacts the rear end portion 44a of the guide hole 44, and the slider 30 does not move at all.

As the drive gear 39 rotates to the right, the stopper 49 and the protrusion 50
The engagement position with and gradually shifts to the vicinity of the tip end portion 49a, and at the slider 30 stop position, the engagement with the tip end portion 49c is performed as shown in FIG.

When the drive gear 39 continues to rotate to the right, the tip 49c comes off the notch 50a, and the large gear 39a moves to the tray rack 38.
When the tray 34 moves toward the disc open position and reaches the tray open position,
An operating piece (not shown) provided on the drive gear 39 closes the stop switch, the loading motor 37 stops, and the unloading operation is completed.

As the slider 30 slides, the plate 26
When the signal reproducing section 25 rotates up and down, the rotating tip portion 26b of the plate 26 has at least two cam pins 32,3.
2 and the two cam grooves 45, 45 of the slider 30 are stably held with respect to the chassis 27, and the plate 26 is always vertically swung in the horizontal direction in the left-right direction without fear of being twisted.

The cam portion 31 is not limited to the cam groove 45 in the illustrated example, and although not shown in the drawings, it is formed as a protrusion, and instead of the cam pin 32 of the rotating tip portion 26b of the plate 26, a protrusion that can be engaged with the protrusion. It can be replaced with another structure having a function similar to that of the above-described example, such as a groove.

(Advantages of the Invention) As described above, the disk loading device according to the present invention, when the tray is in the reproducing position, the slider is locked in the signal reproducing section lowering position by the slider lock mechanism. The slider operation for the upward movement of the signal reproducing portion, which should be performed after the tray reaches the reproducing position and stops, is accurately started,
Also, during the unloading operation, the slider is locked at a predetermined signal reproducing unit lowering position before the signal reproducing unit finishes moving downward and the tray moves, so that the preparation for the next loading operation is completed. No madness will occur.

When the tray reaches the reproduction position, the tray is locked by the tray lock mechanism, so that the disc is transferred from the tray to the turntable when the signal reproducing unit moves during the loading operation, and when the unloading operation is performed. The transfer operation of the disc from the turntable to the tray due to the downward movement of the signal reproducing unit is accurately performed without positional deviation.

Further, since the tray is locked at the reproducing position, the timing of the above-mentioned movement of the slider and the movement of the tray becomes accurate.

[Brief description of drawings]

Each drawing shows an embodiment of the present invention, and FIGS. 1, 2, and 7 are plan views of main parts of the apparatus in respective operating states, and FIGS. 3 and 4 are respectively FIG. 2, FIG. 5 and FIG. 6 are side views of essential parts, FIG. 5 and FIG. 6 are front views of essential parts in FIG. 1 and FIG. 2, FIG. 8, FIG. 9 and FIG. , A side view and a back view. 21 ... Optical pickup, 22 ... Feed servo mechanism, 2
3 ... Turntable, 24 ... Disk motor, 25
...... Signal reproduction part, 26 ...... plate, 26a …… base part,
26b ... Rotating tip, 26c ... Upper plate, 26d ...
Lower plate, 27 ... Chassis, 28 ... Hole, 29 ... Leaf spring, 30 ... Slider, 30a ... Horizontal piece, 30b ... Vertical piece, 31 ... Cam section, 32 ... Cam pin, 33 ... Disc, 34 ... Tray, 35 ... Tray guide, 36 ...
... Loading gear mechanism, 37 ... Loading motor, 38 ... Tray rack, 39 ... Drive gear, 39a
...... Large gear part, 39b …… Small gear part, 40 …… Gate-shaped frame, 41 …… Clamper, 42 …… Slider rack,
43 ... Guide pin, 44 ... Guide hole, 44a ... Back end part, 45 ... Cam groove, 45a ... Upper horizontal part, 45b
...... Lower horizontal part, 47 ...... Ring-shaped wall, 47a, 50a
...... Cutout, 48 ...... Projection, 49 ...... Stopper, 50 ...
… Rushing, 51 …… Elastic material, 53 …… Pinion rack mechanism, 54 …… Guide rod, R ₁ …… Slider lock mechanism, R ₂
...... Tray lock mechanism, M …… Signal reproduction unit lifting mechanism

Claims (2)

[Scope of utility model registration request] 1. A slider which moves a tray between a disc take-out position and a reproducing position by a drive gear for loading or unloading, and a signal reproducing portion which is rotatably provided on a chassis so as to be vertically rotatable. In the disc loading device configured to move the turntable upward so that it comes into pressure contact with the clamper after the tray is stopped during loading by the cam part of the tray and move it down before moving the tray during unloading, the tray is in the playback position. In addition to the above, the disk loading device is provided with a slider lock mechanism for locking the slider at the signal reproducing portion lowering position and a tray lock mechanism for locking the tray at the reproducing position. 2. A slider lock mechanism is provided concentrically with a drive gear and has a ring-shaped wall having a notch, a protrusion provided on the slider so as to contact an inner peripheral surface of the ring-shaped wall, and a slider. A guide hole provided in the guide hole and a guide pin provided so as to abut on the rear end portion of the guide hole, and the tray lock mechanism is an arc-shaped stopper concentrically provided on the drive gear, 2. A protrusion provided with a tray and having a notch capable of engaging with a stopper.
The described disc loading device.