JP2632065B2 - Disc player pickup device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disc player capable of recording or reproducing a signal on or from a disc-shaped recording medium such as a compact disc and a laser disc.

(Prior Art) Conventionally, as a disk player, a disk on a tray is transported horizontally to a position above a turntable, and then the turntable is lifted to lift the disk from the tray. A device in which a disc is pressed against a clamper is known (Japanese Patent Application Laid-Open No. 61-145758 [G11B17 / 04]).

In the disc player, a sub-chassis is supported rotatably in a vertical direction on a main chassis fixed in a cabinet, and a turntable device, a pickup device, and the like are provided on the sub-chassis. When the sub-chassis is driven upward by the power of a motor provided on the chassis, the turntable rises and the disk on the tray is lifted by the turntable.

(Problems to be Solved) However, in the above-mentioned disc player, not only a turntable device but also a pickup device including a dedicated feed motor is provided on the sub-chassis. Large and heavy. As a result, driving the sub-chassis up and down requires not only a large-capacity dedicated motor and a large-scale mechanism, but also a large empty space for the up-and-down movement of the large sub-chassis. However, there was a problem that the size was increased.

Therefore, it is conceivable that the pickup device is provided on a fixed chassis, and only the turntable device is raised and lowered to reduce the size and weight of the lifting unit.

However, when the pickup device is provided on a fixed chassis, the pickup needs to be installed at a slightly spaced height position defined by the optical system with respect to the disk on the turntable installed at the rising end. Therefore, if the distance is small, the pickup must be installed at a position higher than the horizontal transition path of the tray, and as a result, the tray or the disk on the tray collides with the pickup during the tray loading process. Occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pickup device for a disc player which can retract a pickup to a position where there is no risk of interfering with the tray during tray loading.

Another object of the present invention is to provide a disk player capable of reducing the size and weight of an elevating section by driving only a turntable and a spindle motor up and down to thereby reduce the size and weight of the entire apparatus. That is.

(Means for Solving the Problems) A pickup device (9) for a disc player according to the present invention includes a pickup (9) on a slide base (91).
0) is arranged to be able to move up and down.

The slide base (91) is provided on the chassis (13) so as to be able to reciprocate along the radius line of the turntable (50), and a first base opposing the innermost periphery of the disk on the turntable (50). The disc is reciprocated between a position and a second position facing the outermost peripheral portion of the disk or further outside.

The pickup (90) is supported on the slide base (91) so as to be able to move up and down. The pickup (90) is located below the reciprocating transition path of the tray (44). It is driven up and down between the height position.

As a mechanism for driving the pickup (90) up and down, a rotation base (93) on which a pickup (90) is mounted is rotatably provided on a slide base (91), and the rotation base (93) is provided. ) Continues to the tilt mechanism (100), and by the operation of the tilt mechanism (100), the pickup (90) is raised from the retracted position to the height position for signal reproduction, and the pickup (90) is reproduced during signal reproduction. The one that adjusts the direction of the optical axis in ()) can be adopted.

Further, it is possible to adopt a configuration in which the spindle motor (51) to which the turntable (50) is attached is driven up and down with respect to the chassis (13) in succession to the motor elevating mechanism (5). In this case, the turntable (50) is moved from the standby position below the tray (44) at the loading completed position to the tray (4).
Through the central opening (46) of (4), it is possible to ascend to a disk clamping completion position where it can be pressed against the clapper (70) of the disk clamping mechanism (7).

(Operation) In the pickup device (9) in which the pickup (90) is arranged on the slide base (91) so as to be able to move up and down, the pickup (90) is driven while the tray (44) is driven from the disc discharge position to the loading completion position. 90) is installed at the retracted position.

Therefore, the tray (44) and the disk on the tray do not collide with the pickup (90).

When the loading of the tray (44) is completed, the pickup (90) is driven upward from the standby position, and is set at the height position for signal recording or reproduction, and the pickup (90) is set.
Can be formed on the disc signal surface.

Thereafter, the slide base (91) is reciprocated between the first position and the second position, and the pickup (90) performs signal recording or reproduction on the disk on the turntable (50).

When a tilt mechanism (100) continuous with the rotating base (93) is employed as a mechanism for driving the pickup (90) to move up and down, the rotating base (93) is moved to the lower rotating end during tray loading. After the tray loading is completed, the rotation base (93) is driven upward by the operation of the tilt mechanism (100), and the pickup (90) is raised to the height position for signal reproduction. Further tilt mechanism (10
In (0), the rotation base (93) is slightly moved up and down during signal reproduction to adjust the direction of the optical axis of the pickup (90).

When the spindle motor (51) to which the turntable (50) is mounted is connected to the motor elevating mechanism (5) and is driven up and down with respect to the chassis (13), the disk is transported and clamped. Is performed as follows.

Disc (120) on tray (44) at disc ejection position
Then, the tray (44) is transported to the loading completion position by the tray drive mechanism (4). At this time, turntable (50) and spindle motor (51)
Is set at a standby position lower than the height position of the tray (44). After the loading of the tray (44) is completed, the operation of the motor elevating mechanism (5) starts, and the turntable (5)
0) rises from the standby position together with the spindle motor (51). In this process, the turntable (50) passes through the central opening (46) of the tray (44), at which time the disk on the tray (44) is lifted, and the disk is further lifted and the disk clamping mechanism ( 7) Press on the clamper (70).

In this state, the spindle motor (51) is started, the disk is driven to rotate, and a signal is recorded or reproduced by the operation of the pickup device (9).

(Effect of the Invention) In the pickup device (9) in which the pickup (90) is arranged on the slide base (91) so as to be able to move up and down, the pickup (90) is moved to the tray (4) during tray loading.
4) It can be retracted to a position where it does not interfere with the pickup (90), so that even when the focus following range of the pickup (90) is small, collision between the pickup (90) and the tray (44) and the disc can be avoided. I can do it.

A special mechanism for retracting the pickup (90) during tray loading by using a tilt mechanism (100) for adjusting the optical axis of the pickup (90) during signal reproduction as a mechanism for raising and lowering the pickup (90). No mechanism is required, and the device configuration is simplified.

In addition, turntable (50) and spindle motor (5
In a disk player that only raises and lowers 1), since the pickup unit is not included in the lifting unit, the lifting unit is smaller and lighter than before, so that not only the mechanism for driving this unit up and down is simplified, but also the lifting unit An empty space for moving the unit is reduced, and the entire apparatus is reduced in size and weight.

(Example) Hereinafter, an example in which the present invention is applied to a compatible disk player capable of reproducing signals of a plurality of types of disks having different diameters and thicknesses, such as a compact disk and a laser disk, will be described in detail.

It should be noted that the examples are for explaining the present invention,
It should not be construed to limit or reduce the scope of the claimed invention.

Overall Configuration As shown in FIG. 1, a tray (44) is provided in a front panel opening (11) of a cabinet (1) so as to be able to protrude and retract, and the tray (44) is fixed to a chassis (13) in the cabinet (1). The reciprocating movement is guided by the plurality of support members (16).

In the cabinet (1), a tray driving mechanism (4) for reciprocatingly driving the tray (44), and a motor elevating mechanism (E) for driving the spindle motor together with the turntable (50) on the chassis (13). 5), a pickup device (9) including an optical pickup (90) and a tilt mechanism (100), a driving gear mechanism (2) for driving these mechanisms, and a disc clamping mechanism including a clamper (70) ( 7) is deployed. The turntable (50) is attached to the chassis (13) so as to be able to move up and down as described later, and projects upward from a central hole (17) provided in the chassis (13).

The driving gear mechanism (2) uses a loading motor (21) as a power source to drive a belt transmission mechanism (22) and a first gear (2).
3), second gear (24), third gear for relay (3), fourth
Power is transmitted to the tray drive mechanism (4) through the path of the gear (27) and the fifth gear (41), and the sixth gear (37) and the second gear (24) mesh with the third gear (3). An output unit for the pickup device (9);
The gear (3) constitutes an output unit for driving the turntable (50) up and down.

The tray (44) is provided with a mounting portion for a plurality of types of disks, and an opening (46) from which the turntable (50) is to be exposed is provided at the center of the mounting portion.

 Hereinafter, the configuration of each mechanism will be described in detail.

Driving gear mechanism (2) FIGS. 10 (a) and 10 (b) show a loading motor (21), a belt transmission mechanism (22),
And the first to fifth gears (23) (23) (24) (3) (27)
(41) is a plan view and a cross-sectional view showing a line along a power transmission path to the tray drive mechanism. Also,
11 (a) and (b) show a loading motor (21), a belt transmission mechanism (22), a second gear (24), a third gear (3), and a sixth gear (37), which are connected to a power source for the pickup device. It is the top view and sectional drawing which show in a line along with the transmission path.

Each of the gears has a multi-stage structure having a different configuration in the height direction. The second gear (24) includes a large-diameter gear (25) constantly meshing with the first gear (23), a pinion (26) meshable with a rack (98) constituting the pickup device, and a small-diameter gear ( 20). The third gear (3) has a main gear portion (31) meshing with the small-diameter gear portion (20) of the second gear (24) formed all around, and has a tooth surface only in a predetermined angle range. And a sub-gear part (32). The upper portion of the main gear portion (31) has a toothless portion (31a) over substantially a half circumference.
Is provided. The fourth gear (27) is the third gear (3).
And a large-diameter gear part (29) that can mesh with the auxiliary gear part (32). The fifth gear (41) is a gear (42) that always meshes with the large-diameter gear (29) of the fourth gear (27), and a rack (45) that constitutes a tray drive mechanism.
And a pinion part (43) which always meshes. or,
The sixth gear (37) is a main gear (3) of the third gear (3).
1) a gear part (38) that always meshes with the rack (98)
And a pinion part (39) which always meshes.

The third gear (3) has first and second convex surfaces (34) and (35) of cylindrical surfaces over a predetermined angle range above the main gear portion (31) and the auxiliary gear portion (32). The gear (27) has a cylindrical concave surface (27) between the small-diameter gear (28) and the large-diameter gear (29).
a), the sixth gear (37) has a cylindrical concave surface (37a) formed above the pinion portion (39). The convex surfaces (34) and (35) of the third gear (3) are engageable with the concave surface (27a) of the fourth gear (27) and the concave surface (37a) of the sixth gear (37), respectively.

Tray drive mechanism (4) As shown in FIG. 1, a rack (45) extending in the tray retracting direction is attached to the back surface of the tray (44), and the rack (45) and the pinion portion of the fifth gear (41) are attached. (43) is engaged with.

Therefore, when the first gear (23) is driven counterclockwise by the loading motor (21) as shown in FIG.
The third gear (3) rotates counterclockwise via the gear (24), and the auxiliary gear (32) of the third gear (3) is rotated by the fourth gear (2).
7) meshes with the small-diameter gear part (28). Thereby, the rotation of the loading motor (21) is further transmitted to the fifth gear (41) via the fourth gear (27), and the pinion (43) of the fifth gear (41) is driven in the tray housing direction. Because As a result, the tray (44) is carried into the cabinet from the disc discharge position shown in FIGS. 1 and 2 into the cabinet as shown in FIG. 3, and is finally set at the loading completion position shown in FIG. is there. In this state, the tray (44)
The front edge of the cabinet (1) closes the front panel opening (11) of the cabinet (1).

In the tray loading process, the turntable (50) is held at the lower end as described later, and the pickup (90) is set at a low position that does not interfere with the tray (44) due to the operation of the tilt mechanism (100). (See FIGS. 7 and 8).

In this process, the pinion portion (26) of the second gear (24) and the rack (98) of the pickup device (9) are disengaged from each other (see FIGS. 2 to 4), and the pinion portion ( Two
6) idling.

The gear portion (38) of the sixth gear (37) shown in FIG. 11 and the toothless portion (31a) of the main gear portion (31) of the third gear (3) are opposed to each other, and FIGS. As shown in FIG. 4, the concave surface (37a) formed on the sixth gear (37) engages with the second convex surface (35) formed on the third gear (3), and the sixth gear (37) is stopped. Locked in. Therefore, the rack (98) of the pickup device (9) is not driven in this process.

In the tray loading completed state shown in FIG.
The meshing between the auxiliary gear portion (32) of the gear (3) and the small-diameter gear portion (28) of the fourth gear (27) is cut off, and the first convex surface (34) of the third gear (3) and the fourth gear. The concave surface of (27) (27
a) is engaged, and the fourth gear (27) is locked in the stopped state. Therefore, in this state, the tray (44) is also locked to the loading completion position.

The unloading of the tray (44) is performed by rotating the loading motor (21) in reverse and rotating the fifth gear (41) clockwise.

Motor elevating mechanism (5) As shown in FIG. 12, two guide shafts (18) and (18) project downward from the rear surface of the chassis (13). Elevating is guided. A spindle motor (51) is attached to the motor base (52), and a turntable (50) is fixed to an output shaft of the motor. A plurality of positioning seats (53) are provided on the upper surface of the motor base (52) to define the rising end of the motor base (52) against the rear surface of the chassis (13). Three pins (54) protrude.

A pair of slide drive plates (55) and (55) are arranged on both sides of the motor base (52), and each slide drive plate (55) is provided with a plurality of guide members protruding from the rear surface of the chassis (13). (19), the tray is supported so as to be able to reciprocate in the tray retracting direction (see FIGS. 7 to 9). First to third cam grooves (56), (57), (58) extending obliquely are recessed on the inner surfaces of the slide drive plates (55), (55), respectively. As shown in FIG. 13, the first cam groove (56) and the third cam groove (58) have the same shape, and the inclined cam portions (56a) (58a).
And horizontal cam portions (56b) and (58b). On the other hand, the second cam groove (57) includes a first inclined cam portion (57a) and a second inclined cam portion (57b) having a smaller inclination angle than the cam portion. A long hole (55a) and a locking portion (55b) are formed at the rear end of the slide drive plate (55).

As shown in FIG. 12, pins (54) protruding from both sides of the motor base (52) engage with the respective cam grooves (56) (57) (58) of the slide drive plates (55) (55), respectively. Slide drive plate (55)
And a pair of left and right cam mechanisms for raising and lowering the motor base (52) by reciprocating drive of the motor base.

A relay drive plate (64) and a spring (59) are interposed between the slide drive plates (55) and (55). The relay drive plate (64) has the protrusions (67) and (67) formed on both sides of the slide drive plate (55) fitted in the long holes (55a) of the slide drive plate (55) with a margin. The spring (59) is locked by a support piece (66) projecting downward from the front edge of the relay drive plate (64), and both ends of the spring are locked by the locking portions (55) of the slide drive plates (55) and (55). 55
b) is engaged.

A long hole (65) with which a pin (62) of a drive lever (6) described later is engaged is provided on the upper surface of the relay drive plate (64).

Therefore, the relay drive plate (64) is driven by the drive lever (6).
Is moved rearward, the slide drive plates (55) and (55) are pulled rearward via the spring (59), and the motor base (52) is driven upward by the operation of the cam mechanism. .

7 to 9 show how the spindle motor (51) rises. As shown in FIG. 7, when the tray (44) is being loaded, the slide drive plates (55) are at the most advanced position, and the spindle motor (51) and the turntable (50) are different from the tray (44). It is set to a low standby position that does not interfere.

After the tray (44) reaches the loading completion position as shown in FIG. 8, when the slide drive plate (55) moves rearward (leftward in the figure) by pulling of the spring (59), the pin of the motor base (52) is moved. (54) is driven by the inclined cam portions (55a) (57a) (58a) of the first, second and third cam grooves (56) (57) (58) of the slide drive plate (55), and the motor base ( With 52), the spindle motor (51) and the turntable (50) rise. In this process, the turntable (50) lifts the disk (120) on the tray (44) from the tray mounting surface, and abuts the disk on the clamper (70) of the disk clamp mechanism (7).

When the slide drive plate (55) is further pulled to the left, the two pins (5) in front of and behind the motor base (52) as shown in FIG.
4) (54) rides on the horizontal cam portions (56b) (58b) of the first and third cam grooves (56) (58) of the slide drive plate (55), and at the same time the pin (5) at the center of the motor base (52). 54) shifts to the second inclined cam portion (57b) of the second cam groove (57) of the slide drive plate (55). In this state, the slide drive plate (55) is further slightly pulled to the left, so that the second
The positioning seat (53) on the motor base (52) is pressed against the rear surface of the chassis (13) by driving the cam portion (57b),
The turntable (50) is precisely positioned at the rising end,
Will be retained. At this time, turntable (5
The disc (120) on 0) is securely clamped by the disc clamp mechanism (7) as described later.

In the state shown in FIG. 9, the spring (5
9) is elastically deformed, and the projecting piece (6
7) (67) is the slot (55a) (55) of the slide drive plate (55).
It moves backward within the margin of a). Accordingly, the positioning seat (53) of the slide drive plate (55) is pressed against the chassis (13) by the repulsive force of the spring (59).

Next, a mechanism for rotating the drive lever (6) will be described.

As shown in FIGS. 2 to 6, an L-shaped drive lever (6) is rotatably mounted on a support shaft (60) on a chassis (13), and is provided at one end of the lever. The cam follower (61) is engaged with the spiral cam groove (33) formed on the back surface of the third gear (3), and the relay drive plate (62) of the pin (62) provided at the other end of the lever as described above. 64) It is engaged with the long hole (65).

As shown in FIGS. 19 and 20, the cam groove (33) of the third gear (3) has a first cam portion (33a) having a constant radius, and second and third cam portions having a gradually decreasing radius. (33b) (33c)
A fourth cam portion (33d) in which the radius of the outer peripheral wall of the cam groove increases to increase the groove width from W to X in the figure;
And a cam section (35e). 1st cam part (33a)
Engages with the cam follower (61) of the drive lever (6) while the tray is being driven, and the second and third cam portions (33b) (33c)
Engages with the cam follower (61) for driving the motor elevating mechanism (5), and the fifth cam portion (35e) engages with the cam follower (61) during pickup transfer.

In the tray loading shown in FIGS. 2 to 4, the cam follower (61) of the driving lever (6) is engaged with the first cam portion (33a) of the third gear (3), and the third gear ( Even if 3) rotates, the drive lever (6) does not rotate but remains stopped at the clockwise rotation end. Therefore, the two slide drive plates (55) and (55) are installed at the front (left side in the figure) moving end, and the turntable (50) is held at the lower end.

Thereafter, when the third gear (3) is further driven counterclockwise, as shown in FIG. 15, the cam follower (61) of the drive lever (6) is moved to the cam groove (33) of the third gear (3). Driven by the second cam portion (33b), the drive lever (6) rotates counterclockwise. As a result, the slide drive plate (55) is driven backward, and the turntable (50) is raised from the position shown in FIG. 7 to the position shown in FIG. 8 within the operating range of the second cam portion (33b).

Further, when the third gear (3) is driven in the counterclockwise direction to operate the third cam portion (33c) of the cam groove (33), the relay drive plate (64) is moved to the rearward movement end in FIG. Upon reaching, the turntable (50) is raised from the position of FIG. 8 to the position of FIG. 9, and the disk clamp is performed.

Disc Clamp Mechanism (7) The disc clamp mechanism (7) obtains a clamping force by magnetic force, and is attached to a metal support member (71) fixed on a chassis (13) as shown in FIG. The support member (71) forms a flat yoke.

As shown in FIG. 14, the disk clamp mechanism (7)
A disk-shaped clamper (70) and a ring-shaped permanent magnet (7
4) and a holder (75) for holding the magnet (74). The magnet (74) fixed to the holder (75) is located above the support member (71), and the clamper ( 70) and the holder (7) holding the magnet (74)
5) and the clamper (70) are integrated. The support member (71) has a central hole (72) through which the shaft portion (70a) of the clamper (70) penetrates with a margin, and a seat for receiving the magnet (74) is provided on the upper surface of the support member (71). (73) is provided at a plurality of locations.

Accordingly, when the turntable (50) is lowered as shown in FIG. 7, the magnet (74) is moved by the magnetic force between the magnet (74) and the support member (71) so that the magnet (74) rests on the support member (71). 7
In close contact with 3), the clamper (70) is installed at the descending end which is maximally separated from the support member (71).

Thereafter, as shown in FIGS. 8 to 9, after the tray loading is completed, the clamper (70) is pushed up by the disc (120) on the turntable (50) while the turntable (50) is being lifted. When the turntable (50) reaches the rising end as shown in FIG.
4) floats from the seat (73) on the support member (71), and the magnet (7
A constant magnetic gap G is formed between 4) and the support member (71).

As a result, the clamper (70) causes the turntable (5) due to the magnetic attraction between the magnet (74) and the support member (71).
The pressure is reduced toward 0), and the disc (120) is clamped between the tar table (50) and the clamper (70), thereby completing the disc clamping.

According to the disk clamp mechanism (7), the size of the magnet (74) can be freely designed even if the magnetic gap G is slightly different due to the difference in the thickness of the disk to be clamped. Regardless, a sufficient clamping force can be obtained.

The clamp releasing operation after the signal reproduction, that is, the lowering operation of the turntable (50) is performed by rotating the third gear (3) clockwise.

Pickup Device (9) As shown in FIG. 1, on the chassis (13), a guide shaft (92) extending in the tray retracting direction is provided on one side of the turntable (50). A slide base (91) provided with a pickup (90) and the like has an end on the driving gear mechanism (2) side slidably engaged with the guide shaft (92) and an opposite end on the chassis. (13) It is slidably mounted on the top, thereby picking up (90)
Reciprocates exactly along the radius line of the turntable (50).

A rack (98) extending in the sliding direction is integrally attached to the slide base (91). The pinion (26) and the sixth gear of the second gear (24) are attached to the rack (98). The pinion portion (39) of (37) meshes, and the slide base (91) is reciprocated.

As shown in FIG. 21, a turning base (93) to which a pickup (90) is directly fixed is provided on the slide base (91), and protrudes outward on both sides of the turning base (93). The pair of pivots (95) and (95) are supported on a slide base (91), and the rotation base (93) is supported rotatably within a certain vertical angle range. The rotation base (93) is provided with a spring (9) interposed between the rotation base (93) and the slide base (91).
It is urged downward by 6).

The pickup device (9) is equipped with a tilt mechanism (100) for adjusting the inclination of the optical axis of the pickup (90) during signal reproduction. The tilt mechanism (100) retracts the pickup (90) together with the rotation base (93) in order to avoid interference between the tray (44) and the pickup (90) during tray loading shown in FIG. Also serves as a mechanism.

As shown in FIG. 21, the tilt mechanism (100)
3) a cam member (103) having a pin (94) protruding rearward at the end, a spiral cam surface (104) with which the pin (94) slides, and a cam member (103). ), And a motor (101) serving as a power source of the gear mechanism (102). Accordingly, the pin (94) slides along the cam surface (104) by rotating the cam member (103) in the forward and reverse directions by driving the motor (101),
The rotation base (93) is driven up and down.

The cam surface (104) is shown in FIGS. 22 (a) and (b) and FIG.
It has a first slope (104a) with a steep slope and a second slope (104b) with a gentle slope as shown in FIGS. (A) and (b), and a pin (94) slides on the first slope (104a). In the process, Fig. 22 (a)
As shown in (b), the rotating base (93) at the descending end is rapidly raised, and after the operation of the second slope (104b), the 23rd rotation is performed.
The rotation base (93) is brought to a horizontal posture as shown in FIGS. Then, at the time of signal recording / reproducing described later, the original tilt adjustment operation is performed by the operation of the second slope (104b) centering on the horizontal state of FIGS. 23 (a) and 23 (b).

A first photo sensor (106) for detecting a state where the pickup (90) is installed at the lower end as shown in FIGS. 22 (a) and (b) is provided on the chassis (13), and FIG. (A) As shown in (b), a second photo sensor (10) for detecting a state where the rotation base (93) is installed in a horizontal posture.
7) and slide base (91)
A reflection plate (105) for reflecting light from the photosensors (106) and (107) is provided on the back surface of the photosensor.

The rotation base (9) from FIG. 22 (b) to FIG.
The rotation angle of 3) is approximately 8 degrees, and the fluctuation of the inclination angle during the original tilt adjustment operation is ± 2.5 degrees.

By the operation of the tilt mechanism (100), as shown in FIGS.
0) is set at the lower end, and after the loading is completed as shown in FIG. 9, the pickup (90) rises to a height position having a predetermined interval with the disc (120) on the turntable (50).

Therefore, as described above, only the turntable (50) and the spindle motor (51) are moved up and down, and the pickup device (9) is used to pick up the disc (120) during signal reproduction even with the disc player installed on the chassis (13). The distance from (90), that is, the focal length of the optical system of the pickup (90) can be set to an appropriate value.

During disc unloading, the pickup (90) drops again, and the pickup (90) and the tray (44)
Is avoided.

Next, a pickup transfer mechanism for driving the rack (98) shown in FIG. 1 to reciprocate the pickup (90) on the slide base (91) will be described.

When the third gear (3) is further rotated in the counterclockwise direction from the disc clamping completed state shown in FIGS. 5 and 16, as shown in FIG. 17, the main gear () of the third gear (3) is rotated. 31)
Of the third gear is disengaged from the sixth gear (37).
The engagement of the main gear (31) of the gear (3) with the gear (38) of the sixth gear (37) starts.

As a result, the sixth gear (37) rotates clockwise as shown in FIG. 17, and the pinion (39) of the sixth gear (37) moves the rack (98) fixed to the slide base (91) to the left. Start driving towards. As a result, FIGS. 18 and 11 (a) and (b)
As described above, the rack (98) meshes with the sixth gear (37) and also meshes with the pinion (26) of the second gear (24), so that the power of the loading motor (21) is A first path to the rack (98) via the second gear (24) and a second path to the rack (98) via the second gear (24), the third gear (3) and the sixth gear (37). The power is transmitted to the slide base (91) through two power transmission paths.

The first power transmission path includes a loading motor (2
1) between the first gear (23) and the second gear (98)
Since only two gears of the gear (24) are interposed, less backlash occurs between the gears than in the second power transmission path, and therefore, the transfer control of the pickup (90) during signal reproduction can be performed accurately. Can be performed.

Further, the pick-up device (9) has a cam groove (33) of the third gear (3) and a driving lever (6) at the time of pick-up transfer.
The side pressure release mechanism for releasing the pressure contact state with the cam follower (61) is provided.

 Hereinafter, the side pressure releasing mechanism will be described.

In the disk clamp completed state shown in FIG. 16, the drive lever (6) receives the repulsive force of the spring (59),
Clockwise rotation is being applied. Therefore, since the cam follower (61) of the drive lever (6) is pressed against the outer peripheral wall of the cam groove (33) of the third gear (3), the third gear (3) is driven in this state. If the pickup is to be transferred, the cam follower (61) and the cam groove (33)
If the frictional force with the wall surface is applied as a load and the load varies depending on the assembly state of the apparatus, the pickup transfer control cannot be performed accurately.

Therefore, a claw (63) is formed on the drive lever (6), and an L-shaped side pressure release having a hook (81) engageable with the claw (63) is formed on the chassis (13). A lever (8) is provided. The side pressure release lever (8) has a protruding piece (83) on the side opposite to the hook (81), and is rotatably supported by a support shaft (82) on the chassis (13). (13) is urged clockwise by a spring (84) stretched between them. On the other hand, on the back surface of the slide base (91) that constitutes the pickup device (9), a convex portion (99) that can contact the protruding piece (83) of the lateral pressure release lever (8) is formed downward. .

As shown in FIG. 16, when the drive lever (6) is at the counterclockwise rotating end and the slide base (91) is installed at the right moving end, the convex portion ( 9
9) Presses the protruding piece (83) of the lateral pressure release lever (8),
The side pressure release lever (8) is held at a counterclockwise rotating end against the spring (84). Therefore, the claw piece (63) of the drive lever (6) and the hook (81) of the lateral pressure release lever (8) are separated.

Thereafter, as shown in FIG. 17, when the third gear (3) rotates slightly counterclockwise and the sixth gear (37) is driven to move the slide base (91) to the left, the convex portion (99) The lateral pressure release lever (8) rotates clockwise with the movement of the lever, and the hook portion (81) of the lever releases the hook piece (6) of the drive lever (6).
Move toward 3). Further, the cam follower (61) of the drive lever (6) shifts from the third cam portion (33c) of the cam groove (33) shown in FIG. 19 to the engagement state with the fourth cam portion (33d). Since the groove width of the fourth cam portion (33d) is widened from W to X in the outer circumferential direction, the cam follower (61) moves along the outer circumferential wall of the cam portion, so that the drive lever (6) is moved. Rotates slightly clockwise from the position in FIG. 16 to the position in FIG. As a result, the hook piece (63) of the driving lever (6) and the hook (81) of the lateral pressure release lever (8) are in the second position.
The state immediately before the engagement is reached as shown in FIG.

Then, the third gear (3) further rotates counterclockwise,
When the slide base (91) moves to the left, further rotation of the lateral pressure release lever (8) in the clockwise direction causes the hook portion (81) of the lever to move as shown in FIG. (63), and the clockwise rotational urging force of the spring (59) used for the drive lever (6) is received by the engagement, and the drive lever (6)
Can no longer rotate clockwise and stops.

At the same time, the cam follower (61) of the drive lever (6) is connected to the fourth cam portion (33) of the cam groove (33) shown in FIG.
The cam follower (61) moves away from the outer peripheral wall of the cam groove (33) along with the shift, and the cam follower (61) moves from the cam groove (33) to the fifth cam portion (33) having a larger groove width. 33) The lateral pressure exerted on the wall is released. As a result, the third gear (3)
Can drive the second gear (24) and the sixth gear (37) without receiving the resistance from the cam follower (61) of the drive lever (6).

As shown in FIG. 6, in the process of reciprocating the pickup (90) from the outer periphery to the inner periphery of the disk, that is, during signal reproduction, the drive lever (6) remains locked in the pressure measurement released state. And the cam follower (61) of the lever (6) contacts the inner peripheral wall and the outer peripheral wall in the fifth cam portion (33e) of the cam groove (33) shown in FIG. Relative movement without.

The engagement release operation between the claw piece (63) of the drive lever (6) and the hook portion (81) of the lateral pressure release lever (8) after signal reproduction is performed by rotating the third gear (3) clockwise. Then, the slide base (91) is moved toward the moving end on the outer peripheral side of the disk, and the side pressure release lever (8) is rotated counterclockwise by the projection (99) of the slide base (91). Driving of the fourth cam portion (33d) of the cam groove (33) of the third gear (3) causes the drive lever (6) to rotate slightly counterclockwise (see FIG. 17).

Support structure of chassis (13) The chassis (13) is a cabinet (1) as shown in FIG.
It is supported by a plurality of columns (14) projecting from the base (12) at the bottom, and the head of the column (14) and the chassis (1) are supported.
3), a cushioning member (1) made of elastic material such as rubber
5) is interposed.

Therefore, even if an exciting force is applied to the base (12) in accordance with the operation of each of the above-described mechanisms, the exciting force is applied to the buffer member (1).
Vibration that is absorbed by 5) and hinders signal reproduction by the pickup (90) does not occur.

Such a vibration suppression structure is realized by disposing all mechanisms such as a driving gear mechanism (2), a tray driving mechanism (4), a disk clamp mechanism (7), and a pickup device (9) on a fixed chassis (13). It is a thing.

Motor integrated clamp device (110) In the above embodiment, the spindle motor (5
1) The motor-integrated turntable device has a turntable (50) attached to the output shaft of (1), but only the turntable (50) is provided on the base (52), and a spindle motor for rotating the disk Can be incorporated in the disk clamp mechanism (7) shown in FIG.

FIGS. 25 to 27 show a motor-integrated clamping device (11).
0) is shown.

In the motor-integrated clamp device (110) shown in FIG. 25, a magnet (111) is attached to the head of a clamper (70) via a back yoke (122), and a coil is placed at a position facing the magnet (111). Deploying the coil (112)
Is supported by a non-magnetic member (115) fixed on the chassis. The rotary yoke (116) constituting a motor together with the back yoke (122), the magnet (111) and the coil (112) is fixed to a clamper (70). A thrust bearing (113) is interposed between the elastic member (114) fixed to the non-magnetic member (115) and the head of the clamper (70).

Accordingly, as the turntable (50) rises, the disk (120) on the turntable (50) is moved to the elastic member (1).
When the clamper (70) is pushed up against the clamp 14), a repulsive force of the elastic member (114) generates a clamping force. In this state, when the coil (112) is energized, the rotary yoke (116) It is driven to rotate together with the clamper (70). In this case, even if the height position of the clamper (70) differs depending on the type of disk, the distance between the magnet (111) and the rotary yoke (116) does not change, so that the motor rotation torque is maintained at a constant value.

In the motor-integrated clamp device (110) shown in FIG. 26, the stator yoke (117) is placed on the non-magnetic member (115).
And fix the coil (112) on the stator yoke (117).
Has been deployed. At a position facing the coil (112), a magnet (111) supported by a clamper (70) via a back yoke (122) is provided. In this case, a clamping force is obtained by a magnetic attraction force between the magnet (111) and the stator yoke (117) constituting the motor.

In a motor-integrated clamp device (110) shown in FIG. 27, a plurality of engaging pieces (118) are protruded from a clamper (70), and a shaft portion (121) is attached to the engaging pieces (118). The shaft (121) is engaged with the magnet (111) via a back yoke (122) at the upper end of the shaft (121). Further, the clamper (70) and the shaft portion (121) are connected by an elastic member (119). Therefore, even if the height position of the clamper (70) differs due to the difference in the thickness of the disk, the position fluctuation is absorbed by the elastic member (119), and the gap between the magnet (111) and the coil (112) is reduced. It is almost constant. As a result, the disc clamping force and the motor rotation torque are maintained at the predetermined values.

By mounting the motor-integrated clamp device (110) as described above, only the turntable (50) can be raised and lowered with respect to the chassis (13), and the weight of the lifting and lowering unit can be further reduced.

The description of the above embodiments is for the purpose of describing the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing the entire structure of a disc player according to the present invention, FIGS. 2 to 6 are plan views showing a series of operations from a tray eject state to a signal reproducing state, and FIGS. FIG. 9 is a series of partially cutaway side views showing the operation of a motor elevating mechanism, a disc clamp mechanism, and a tilt mechanism. FIGS. 10 and 11 are explanatory diagrams showing shapes and meshing states of each gear of a driving gear mechanism. FIG. 12 is an exploded perspective view of a motor elevating mechanism, FIG. 13 is a side view of a slide drive plate, FIG. 14 is an exploded perspective view of a disk clamp mechanism, and FIGS.
FIG. 19 is a series of plan views showing the operation of the drive lever and the side pressure release lever, FIG. 19 is a rear view of the third gear, FIG. 20 is a diagram showing a cam curve, FIG. 21 is a perspective view of the pickup device, and FIG. 23 (a) and 23 (a) are plan views showing the operation of the tilt mechanism, respectively, and FIGS. 22 (b) and 23 (b) are FIGS. 22 (a) and 23 (a), respectively. 24 is a partially cutaway side view showing a chassis elastic support structure, and FIGS. 25 to 27 are cross-sectional views each showing a schematic configuration of a motor-integrated clamp device. (1) Cabinet, (13) Chassis (2) Drive gear mechanism, (33) Cam groove (4) Tray drive mechanism, (44) Tray (5) Motor Lifting mechanism (50) Turntable (51) Spindle motor (6) Drive lever (61) Cam follower (7) Disc clamp mechanism (70) Clamper (74) ... magnet (8) ... side pressure release lever, (9) ... pickup device (90) ... pickup, (93) ... rotating base (100) ... tilt mechanism, (104) ... cam surface

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Toshihide Hamaguchi 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-64-89068 (JP, A) 1-196784 (JP, A) Fully open 1986-121576 (JP, U)

Claims (1)

(57) [Claims] 1. A tray (44) supported on a chassis (13) so as to be reciprocally movable in a horizontal direction, and the tray (44) is driven from a disc discharge position to a loading completion position above a turntable (50). A tray drive mechanism (4)
The turntable (5) is provided on the chassis (13) so as to be able to reciprocate along the radius line of the turntable (50).
0) A slide base reciprocatingly driven between a first position facing the innermost peripheral portion of the disk to be clamped on the upper side and a second position facing or further outside the outermost peripheral portion of the disk. (91), a retractable position supported on the slide base (91) so as to be able to move up and down, below the reciprocating transition path of the tray (44), and a height position for signal recording or reproduction approaching the tray (44). Pickup that is driven up and down between (90)
And pick up during the tray loading process (9
0) is a disc player installed at the retracted position, wherein a rotating base (93) on which a pickup (90) is mounted is provided on the slide base (91) so as to be rotatable vertically, and Dynamic base (93) with tilt mechanism (100)
The tray is driven up and down, and during tray loading, the pickup (90) is lowered to the retracted position,
A disc player pickup device that adjusts the direction of the optical axis of the pickup (90) during signal reproduction.