JPH0487062A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To quickly and smoothly shift a signal reproduction mechanism between both positions of reproduction by securing the smooth and continuous movements within a single vertical plane for the horizontal shift of the signal reproduction mechanism between both positions of reproduction and the vertical shift of the mechanism for a disk clamping operation respectively. CONSTITUTION:A mobile chassis 2 containing a signal reproduction mechanism 140 is provided together with a guide support mechanism which guides the reciprocating motions of the chassis 2 on a vertical plane including both positions of reproduction, and a mobile chassis drive mechanism which drives the reciprocating motions of the chassis 2 along the guide support mechanism. Thus the continuous movements are secured within the same vertical shift plane for the approximately horizontal shift of the chassis 2 between both positions of reproduction and the up-down shift of the chassis 2 for clamping and releasing operations of a disk. As a result, the driving load is reduced for the chassis 2 and the chassis 2 can be smoothly moved with a tray drive mechanism provided at only the single side of the chassis 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a disc playback device that plays back signals from a disc-shaped recording medium such as a compact disc or a laser disc.

(Prior Art) Conventionally, as a disc playback device that can selectively play back two discs using a single pickup, a signal playback mechanism including a pickup and a turntable is reciprocated along a horizontal plane, and A horizontally moving type disc playback device (Japanese Patent Laid-Open No. 61-80654
(G11B17/22) ), a subchassis is pivotably supported on a fixed chassis so that it can rotate in a horizontal plane and in a vertical plane, and a signal reproducing mechanism installed on the subchassis can be rotated in a horizontal plane. A rotary type disc playback device (unexamined Japanese Patent Application Publication No. 2003-130001) that clamps the disc by moving it downward to a first playback position and a second playback position, and then rotates it upward along a vertical plane to reproduce a signal. Showa 63-304480CG1
1B21/12)) etc. are known.

(Problem to be solved) However, in a horizontally moving type disc playback device, in addition to the mechanism that drives the signal playback mechanism in the horizontal direction, a mechanism for moving the clamper up and down is required, making the configuration complicated. was there.

In addition, rotary disk playback devices require a mechanism for rotating the signal playback mechanism in a horizontal plane and a mechanism for rotating it in a vertical plane, as well as a mechanism for switching between these drive mechanisms, resulting in a complex configuration. In addition, since the rotation direction is turned at right angles, it takes time to move between replay positions, and furthermore, there is a problem in that noise is generated when the signal replay mechanism suddenly changes direction.

An object of the present invention is to selectively move a single signal reproducing mechanism to a first reproducing position and a second reproducing position to provide a disc reproducing apparatus capable of reproducing signals from a disc set at both reproducing positions. By making the horizontal movement between the replaying positions of the playback mechanism and the vertical movement for disc clamping smooth and continuous movements within a single vertical plane, the structure is simple and can be made compact. Another object of the present invention is to provide a disc reproducing device in which a signal reproducing mechanism can be quickly and smoothly moved between reproducing positions.

(Means for Solving the Problems) A disc playback device according to the present invention includes a movable chassis (2) equipped with a signal playback mechanism (140), and a reciprocating movement of the movable chassis (2) in a vertical plane passing through both playback positions. It includes a guide support mechanism that guides movement, and a movable chassis drive mechanism that drives the movable chassis (2) back and forth along the guide support mechanism.

The movable chassis guide support mechanism moves the movable chassis (
a first guide support part that guides the attitude change of the movable chassis (2) until one end on the moving direction side of the movable chassis (2) is at approximately the same height and the other end is lowered to a second attitude; and a signal regeneration mechanism. From the third posture of the movable chassis (2) with (140) set at the second playback position, the movable chassis (
a second guide support part that guides the attitude change of the movable chassis (2) until one end on the moving direction side of the movable chassis (2) is at approximately the same height and the other end is lowered to a fourth attitude; 2) a third guide support portion that guides movement in the substantially horizontal direction between the second attitude and the fourth attitude.

The guide support mechanism of the movable chassis (2)
It is equipped with two guide support plates (11) and (15) erected in front and back across the vertical movement plane of 2), and these guide support plates (
11) and (15), a first guide groove (12) (16) extending substantially horizontally is formed on one playback position side, and a horizontal portion (13a) is formed on the other playback position side. (
17a) and vertical parts (13b) (13b) (13c) (17b) (17c) that bend from both ends of the horizontal part and extend upward.
) are formed with second guide grooves (13) (17), and first shaft parts (21) (2) protruding from the movable chassis (2).
1) and the second shaft portions (22) (22) into the first guide groove (
12) It is slidably engaged with (16) and the second guide grooves (13) and (17).

In addition, the movable chassis drive mechanism has one guide support plate (15
); and a drive mechanism (3) for reciprocating the drive slide member (4). The second shaft portion (22) of the movable chassis (2)
) is formed into a 7-shaped groove (51) into which the 7-shaped groove (51) is fitted, and the slope of the 7-shaped groove (51) allows the second guide groove (17) (7) of the second shaft part (22) to be connected to the vertical part (17b). (17c)l:
Driving along the line is performed.

(Operation) The movable chassis (2) is moved to the terminal end of the first guide support part and held in the first position, and the signal reproducing mechanism (140)
is set to the first playback position, turn the turntable (1
10) is raised to the highest position at one end of the travel stroke, thereby clamping the disc on the turntable (110) and making it possible to reproduce signals from the disc.

When the movable chassis drive mechanism is operated from the state where the movable chassis (2) is held in the first posture, the movable chassis (2)
) is guided by the first guide support part, and while one end is maintained at approximately the same height, the other end is lowered and rotated to the second posture. During this process, the disk is unclamped.

When the movable chassis drive mechanism is further operated, the movable chassis (2) is guided by the third guide support section, moves substantially horizontally from the second attitude, and is set to the fourth attitude below the second playback position. At this time, one end of the movable chassis (2) will be installed at the same height position as the height in the first attitude, and the other end will be installed at a position lower than the height position. .

When the movable chassis drive mechanism is further operated from this state, the movable chassis (2) is guided by the second guide support part, and while the one end is maintained at approximately the same height, the other end is raised. do. This allows the movable chassis (2) to move to the second position.
It moves to the end of the guide support and rotates to the third position. At this time, the signal reproducing mechanism (140) is set to the second reproducing position. Also, during this process, turntable (1
10) rises to the highest position, thereby clamping the disc on the turntable (110) and making it possible to reproduce signals from the disc.

(Effects of the Invention) In the disc playback device according to the present invention, by driving the movable chassis (2) in one direction along the continuous movement guide mechanism, the movable chassis (2) is moved approximately horizontally between the playback positions of the movable chassis (2). movement in the direction, and vertical movement of the movable chassis (2) for clamping and releasing the disk.
Performed by successive movements within the same vertical movement plane.

Therefore, the load when driving the movable chassis (2) is small, and smooth movement can be achieved by simply disposing the tray drive mechanism, for example, only on one side of the movable chassis (2).

Also, no special lumbar drive mechanism is required.

As a result, the device configuration can be simplified and downsized, and the signal reproducing mechanism can be quickly moved between the two reproducing positions.

(Example) Hereinafter, an example of a disc playback device according to the present invention will be described in detail along with the drawings. The examples are for illustrating the present invention, and should not be construed to limit or reduce the scope of the invention described in the claims.

First, an outline of the configuration of the disc playback device will be explained, and then the specific structure of each component will be explained in detail.

In the following description, the tray ejection direction is referred to as the front, the tray storage direction is referred to as the rear, and the left and right directions are the left and right directions in each drawing used for the description.

L body side view 11 As shown in Figure 1, the disc playback device has a pair of left and right trays (7) (71) on the front of a flat cabinet (1).
Both trays (7) (
71) The two discs above can be selectively played back by a single optical pickup (100).

Guide and support plates (11) and (15) are provided upright at the front and rear of the cabinet (1), respectively, and both guide and support plates (11) (
15), a movable chassis (2) is supported so as to be able to reciprocate from side to side, and a pickup (100) and a turntable (110) are installed on the movable chassis (2). The turntable (110) is powered by a spindle motor (1) installed on a movable chassis (2) as shown in Figure 2.
11) is fixed to the output shaft and rotated at high speed. A drive mechanism consisting of a driving mechanism (3) provided on the back of the rear guide support plate (15), and first and second drive slide members (4) and (5) is connected to the movable chassis (2), and thereby Pickup (100) and turntable (110)
) are the left and right trays (7) (71) installed in the storage position.
) It is possible to move back and forth between

Each tray (7) (71) has an opening (
72) is provided.

Two guide shafts (103) (103) extending in the direction of tray ejection and retrieval are installed on the movable chassis (2), and these guide shafts allow the pickup (100)
The reciprocating movement of the disk in the radial direction is guided. The pickup (200) includes a pickup transfer mechanism (101).
) are connected, and the pickup is moved during signal reproduction.

Further, a pair of side rail members (81) (81) and a center rail member (82) extending along the tray ejection/removal direction are installed on both sides and the center of both guide support plates (11) (15), Both trays (7) (7) are connected by these rail members.
1) The reciprocal movement of the appearance and appearance is guided. Both trays (7)
(71) is selectively driven back and forth by a tray drive mechanism (8) provided in the center of the front guide support plate (11). A mode control mechanism (6) is interposed between the tray drive mechanism (8) and the movable chassis drive mechanism, which controls the engagement and disengagement of the tray drive mechanism (8) with the trays (7) and (71). controlled.

The direction of movement of the pickup is the same as the direction of ejection and retraction of the tray, while the direction of movement of the movable chassis is perpendicular to the direction of ejection and retraction of the tray.

As shown in FIG. 1, disk clampers (121) (one clamper is not shown) are provided above each tray (7) (71) in the storage position, and these clampers are connected to the rail members (81) (81). ) (82), it is attached to a support member (122) that is movable up and down within a certain range and freely rotatable, and constitutes a disk clamp mechanism (120). In addition, the disk clamp mechanism (120) is
A magnetic system is adopted in which the clamping force is obtained by a magnet (not shown) fixed to the clamper (121).

As shown in FIG. 3 of the chassis, the front guide support plate (11) and the rear guide support plate (15) have a first guide groove (15) on the left side of each of the arcuate guide grooves ( 12) (16)
, On the right side, there are horizontally long U-shaped second guide grooves (13) (17).
has been established. The first guide groove (12) (16) is
The curved portions (12a) 06a) have short horizontal portions (12b) (12c) (16b) (16c) at both ends. In addition, the horizontal portions of the second guide grooves (13) and (17) (
13) (17) Vertical parts on both sides (13b) (13c)
(17b) (17c) are the first guide groove (12) (
16), and the horizontal part and the vertical part are circular arc parts (13d) with a relatively large radius of curvature.
)(13e)(17d)(17e).

On both sides of the movable chassis (2), there are first holes projecting forward and backward, respectively.
Shaft portions (21) (21) and second shaft portions (22) (22) are formed, and the first shaft portions (21) (21) are inserted into the first guide grooves (12) (16). The portions (22) (22) are slidably engaged with the second guide grooves (13) (17). A sub-chassis (102) is installed on the movable chassis (2) via a vibration isolating member (106), and the aforementioned guide shaft (103) (10) is attached to the sub-chassis (102).
3) A signal reproducing mechanism (140) consisting of a pickup (100), a pickup transfer mechanism (101), a turntable (110), etc. is provided. Therefore, as shown in FIG. 8, the movable chassis (2) and the signal regeneration mechanism (140) on the chassis
It moves from the lower position of the other clamper (121) to the lower position of the other clamper (121) while swinging from side to side. That is, at the left moving end in FIG. 8, the movable chassis (
The first shaft part (21) of 2) is located at the left end of the first guide groove (16) of the rear guide support plate (15), and the first shaft part (21) of
) is located at the left end of the second guide groove (17), and the movable chassis (2) maintains a horizontal attitude. In the process of moving from this position to the right, the movable chassis (2) lowers its left side and tilts significantly, returns to a substantially horizontal position, passes below the central rail member (82) in this position, and then returns to the center rail member (82). After lowering the left side and taking a greatly tilted posture, we finally reached the first axis (21
) comes into contact with the right end of the first guide groove (16), the second shaft part (22) comes into contact with the right end of the second guide groove (17),
The movable chassis (2) returns to a horizontal position. When the movable chassis (2) passes below the central rail member (82), the turntable (110) descends to the lowest position to avoid interference with the central rail member (82).

When the movable chassis (2) is installed at the left and right moving ends, the turntable (110) is connected to the clamper (121).
the turntable (110).
If a disk is placed on top, disk clamping is performed.

Movable Chassis Drive As shown in FIGS. 4 and 5, a base member (18) is provided on the rear guide support plate (15) to protrude rearward, and a protrusion extending in the longitudinal direction is provided on the base member (18). A rear guide support plate (15) of the protrusion (181) is formed.
On the side, a rack (18
2) is formed.

The first driving slide member (4) is attached to the protrusion (181).
) are slidably engaged with grooves recessed in the longitudinal direction, and the first driving slide member (4) can reciprocate along the protrusion (181). The first drive slide member (4) is a seventh drive slide member (4).
As shown in the figure, the rack section (
41) are formed, and a first cam surface (43) and a second cam surface whose heights change laterally and project laterally along the rack section (41) are formed below the rack section (41). (44)
and a third cam surface (45) are sequentially formed. The first cam surface (43) each has two convex portions (431) (433) and a concave portion (432) (434), and the second cam surface (44)
is four convex parts (441) (443) (445) (4
47) and three concave portions (442), (444), and (446), and each third cam surface (45) has one convex portion (451).
and a recess (452). These cam surfaces are provided with first, second and third mode switches (131) (131), which will be described later.
32) and (133) are respectively engaged, whereby mode detection is performed. Moreover, on the top surface of the rack part (41),
A positive cam portion (42) is recessed so that the height of the cam curve on the horizontal plane changes in four steps in the sliding direction. The cam portion (42) is connected to the mode control mechanism (6) to switch tray drive modes as described later.

Furthermore, as shown in FIGS. 4 and 5, a second drive slide member (5) is engaged on the base member (18) so as to be slidable in the same direction as the first drive slide member (4). The second driving slide member (5) is formed with a rack portion (52) extending in the sliding direction as shown in FIG. 6, and has a 7-shaped groove (51) formed in the vertical wall portion. The figure 7 groove (5
1) has short horizontal parts (51b) at both ends of the V-shaped part (51a).
) (51c) is provided.

The driving mechanism (3) for reciprocating the first driving slide member (4) is a base member (18) as shown in FIGS. 4 and 5.
), and a driving motor (31) serving as a power source;
A driving gear (32) attached to the motor shaft, a reduction gear (32) consisting of a large diameter gear part (34) and a pinion part (35).
33), the pinion part (35) meshing with the rack part (41) of the first driving slide member (4).

An idler gear (36) is pivotally supported on a shaft protruding downward from the back surface of the first driving slide member (4), and the idler gear (36) engages with the rack (182) on the base member (18) at the same time. , the rack part (5) of the second driving slide member (5)
2) (see Figure 15).

Therefore, when the first driving slide member (4) is reciprocated by the driving mechanism (3), the idler gear (3)
6) reciprocates and rotates in forward and reverse directions, causing the second drive slide member (5) to reciprocate in the same direction as the first drive slide member (4) at twice the speed.

In the figure 7 groove (51) of the second drive slide member (5),
A second shaft portion (22) protruding from the movable chassis (2) is engaged. Therefore, when the second drive slide member (5) reciprocates, the second shaft part (22) is driven by the pressing force of the inner wall of the figure-7 groove (51), and the movable chassis (2) moves into the first guide groove ( 12) (16) and the second guide groove (13) (
17). Figures 10 to 14
The figure shows the driving process from the left moving end to the right moving end of the movable chassis (2).

In the state shown in Fig. 10, the second driving slide member (5) is installed at the left moving end, and the second shaft portion (22) is in the figure-7 groove (
51), and is located at the upper end of the vertical portion of the second guide groove (17). When the second driving slide member (5) moves to the right from this state, the second shaft portion (22) of the movable chassis (2) is pressed down against the slope of the figure-7 groove (51) as shown in FIG. and descends along the vertical part of the second guide groove (17), and in this process, the first shaft part (21) of the movable chassis (2) moves over the horizontal part (16b) of the first guide groove (16). move horizontally. Therefore, the movable chassis (2) rotates counterclockwise about the first shaft portion (21), the turntable (110) separates from the clamper (121), and the disk clamp is released.

When the second driving slide member (5) further moves to the right,
As shown in Fig. 12, the second shaft part (22) moves horizontally along the second guide groove (17) while remaining located at the lower end of the V-shaped groove (51), and the first shaft part (21) moves horizontally along the second guide groove (17). It moves to the right while slightly moving up and down along the curved part (16a) of the first guide groove (16). In this process, the movable chassis (2) is set in a substantially horizontal position.

Then, as shown in FIG. 13, when the second shaft part (22) reaches the terminal end of the horizontal part of the second guide groove (17), the first shaft part (
21) passes through the curved portion (16a) of the first guide groove (16) and rides onto the horizontal portion (16c) on the right side. During this process, the movable chassis (2) gradually rotates counterclockwise and tilts.

When the second driving slide member (5) further moves to the right from this state, the second shaft portion (22) is pressed against the slope of the figure 7 groove (51) and is pushed to the right side of the second guide groove (17). The vertical part of (
17c), and finally reaches the upper end of the vertical part (17c) of the second guide groove (17) as shown in FIG. Part (5
1b). In addition, a movable chassis (2
) moves horizontally on the horizontal portion (16c) on the right side of the first guide groove (16). As a result, the movable chassis (2) rotates clockwise about the first shaft portion (21) and is held in a horizontal position.

Along with this, the turntable (110) rises to a height position where it contacts the clamper (121), and a disk clamping operation is performed.

In addition, the first and second guide grooves (1) of the front guide support plate (11)
2) Regarding the engagement of (13) with the first and second shaft portions (21) and (22) of the movable chassis (2), the same operation as that from FIG. 10 to FIG. 14 is performed; The movable chassis (2) does not tilt in the front-back direction.

When the driving motor (31) rotates in the opposite direction, the operation in the opposite direction is performed from the state shown in FIG. 14 to the state shown in FIG. 10.

In the reciprocating movement of the movable chassis (2), if the rotational speed of the drive motor (31) is constant, the movable chassis (
The horizontal movement speed in 2) is fast in the middle of the movement,
It becomes slower near both moving ends. For example, when the movable chassis moves to the left as shown in FIG. 9, the second shaft portion (22) slides along the horizontal portion (17a) of the second guide groove (17),
The first shaft portion (21) is connected to the curved portion (16) of the first guide groove (16).
In the process of sliding along a), the movable chassis moves in the horizontal direction at a relatively high speed V1, but the second shaft portion (2
2) slides along the arc portion (17d) of the second guide groove (17), and the first shaft portion (21) slides along the arc portion (17d) of the second guide groove (17).
), the movement direction of the second shaft part (22) gradually changes from the horizontal direction to the vertical direction, so the movement of the first shaft part (21) at this time speed V
, is greatly reduced from the speed ■, and the first shaft portion (21
) comes into contact with the end of the first guide groove (16), the impact is slight, and problems such as impact noise do not occur.

Note that the above effect can be obtained if the radius of curvature R of the outer peripheral surface of the arcuate portions (17d) (17e) is slightly larger than the diameter of the second shaft portion (22), but in order to obtain a sufficient effect, for example, It is desirable that the size is approximately twice the diameter of the second shaft portion (22).

As described above, the reciprocating movement of the movable chassis (2) is performed by the second shaft portion (22) of the movable chassis (2) by the second driving slide member (5) provided on the rear guide support plate (15). ), and when the movable chassis (2) is installed at the moving end for signal reproduction as shown in FIG. 10 or 14, the forward guidance of the movable chassis (2) as shown in FIG. The second shaft portion (22) on the side of the support plate (11) has a second guide groove (13
) is suspended in the air at the upper end of the vertical part (13b) or (13c). Therefore, in order to reliably hold the movable chassis (2) in a stable horizontal position even when an impact force is applied from the outside, it is necessary to It is effective to support them. For this purpose, a movable chassis locking mechanism (9
) is provided.

As shown in FIG. 3, the movable chassis locking mechanism (9) includes a locking member (91) that extends across both front guide and support plates (11) and (15), and a second guide groove of the front guide and support plate (11). (
13) Rectangular lock holes (14) (14) opened close to the left side of the raindrop holders (13b) (13c), respectively.
It is equipped with. The locking member (91) is attached to the back surface of the movable chassis (2) so as to be able to reciprocate in the axial direction. A pressed shaft portion (92) is provided to protrude through the portion (22) and can emerge from the 7-shaped groove (51) of the second driving slide member (5). A square lock shaft portion (93) that can be fitted into the lock hole (14) with a slight margin is protruded from the end portion on the 11) side. Movable chassis (2) and lock member (91
) as shown in FIGS. 3 and 25, and the lock member (91) is attached to the rear guide support plate (15).
It is biased towards the side.

In order to press the locking member (91) toward the front guide support plate (11) against the spring (90), as shown in FIG. On both sides,
A pair of pressing pieces (53) and (54) each have a horizontal portion (51b).
) (51c) and protrudes inward so as to cover it.

The pressing pieces (53) (54) are formed thin and have appropriate elasticity.

When the movable chassis (2) is installed at the left moving end as shown in Figures 5 and 10, the right pressing piece (54)
presses the pressed shaft portion (92) toward the front guide support plate,
The lock shaft portion (93) shown in FIG.
1) into the lock hole (14) on the right side. As a result, the movable chassis (2) is locked, and the load acting on the lock shaft (93) is supported by the wall surface of the lock hole (14).

At this time, the two first shaft portions (2) of the movable chassis (2)
1) The load acting on (21) is the first guide groove (12) (
16), and one second shaft portion (2) on the rear guide support plate (15) side
2) is supported by the horizontal part (51c) of the 7-shaped groove (51) as shown in Fig. 5, and the load acting on the other second shaft part (
22) is supported by the lock hole (14). Therefore, the movable chassis (2) is reliably supported at its four corners and maintains a stable horizontal posture.

During the movement process of the movable chassis (2) shown in FIGS. 11 to 13, the pressing piece (54) separates from the pressed shaft (92), and the locking member (91) is biased by the spring (90). Move to the rear guide support plate (15) side and lock the lock shaft (9
3) is pulled out from the lock hole (14).

Thereafter, when the movable chassis (2) moves to the right moving end as shown in Fig. 14, the left pressing piece (53) of the second drive slide member (5) presses the pressed shaft (92). ,
The lock shaft portion (93) shown in FIG.
1), and the movable chassis (2) is locked in the same manner as described above.

In addition, in order to easily fit the lock shaft portion (93) of the lock member (91) into the lock hole (14), the horizontal portion (51b) of the figure-7 groove (51) is inserted as shown in FIG. (51
On the bottom surface of c), protruding portions (51d) and (51e) slightly protruding upward are formed at the end on the figure 7 portion (51a) side.

Therefore, for example, in the process of transitioning from the state shown in FIG. 13 to the state shown in FIG. At this time, the movable chassis (2) rotates slightly counterclockwise from the horizontal position, assumes a position with the left side tilted slightly higher, and then returns to the horizontal position.

Figures 30 to 35 show the movable chassis (2
) is moving from a greatly tilted position to a position slightly raised above the horizontal position, and then returns to the horizontal position again, when the lock shaft (93) of the lock member (91) touches the front guide support plate ( 11) represents the operation of fitting into the lock hole (14).

As shown in FIG. 33, the movable chassis (2) is tilted significantly, and the lock shaft (93) of the lock member (91) is in the lock hole (1).
4), the pressing piece (54) presses against the suppressed shaft (9) of the locking member (91) as shown in
2), the lock shaft portion (93) maintains a non-contact state with the front guide support plate (11). Thereafter, as shown in Fig. 34, the movable chassis (2) is in a position slightly raised from the horizontal position, and the lock shaft (93) floats a short distance from the lower wall of the lock hole (14). ,
In this state, as shown in FIG. 31, the pressing piece (54) presses the pressed shaft (92) and locks the lock shaft (93) into the lock hole (
14). Then, as the movable chassis (2) returns to the horizontal position as shown in Fig. 35, the lock shaft (93) hits the lower wall of the lock hole (14), and the horizontal position of the movable chassis (2) is maintained. be done. At this time, as shown in FIG. 32, the pressed shaft portion (92) is
), and the lock shaft (93) is pushed into the lock hole (
14) remains inserted.

As mentioned above, the movable chassis (2) is once lifted slightly above the horizontal position, and the locking member (91)
Since the lock shaft (93) fits into the lock hole (14), the lock shaft (93) does not get caught on the lower opening edge of the lock hole (14), and the insertion operation is performed reliably. .

As shown in FIG.
1), and a slide lever (62) extending horizontally from above the rear guide support plate (15) toward the front guide support plate.
It is equipped with. The rotation lever (61) is pivoted (611) on the rear guide support plate (15) at the center, and the cam follower (612) provided at the lower end is connected to the cam portion (42) of the first drive slide member (4). ), and the upper end of the lever is connected to the end of the slide lever (62).

FIGS. 15 to 19 show the cam portion (42) of the first driving slide member (4) and the first, second, and third cams in the movable chassis driving process from FIG. 10 to FIG. It shows the movement of surfaces (43), (44), and (45). As the first driving slide member (4) moves to the left, the rotating lever (61) is engaged with the cam portion (42).
rotates to move the slide lever (62) back and forth.

As shown in FIG. 20, the slide lever (62) is supported on the central rail member (82) so as to be able to reciprocate within a predetermined range.
62) The end is connected to the tray drive mechanism (8).

The tray drive mechanism (8) is equipped with a motor (83) fixed to the front guide support plate (11) as a power source, and the rotation of the motor is controlled by a pair of left and right wheels attached to a swing lever (86) shown in FIG. is transmitted to the pulleys (84) (84), and rotationally drives the switching gears (85) (85) provided integrally with these pulleys. Furthermore, as shown in FIG. 20, a pair of left and right tray drive gears (80) (80) are installed on a base plate (19) fixed to the front guide support plate (11). Each tray drive gear (80) includes a large-diameter gear portion (801) to which the switching gear (85) engages and disengages as the swing lever (86) swings in a horizontal plane, and a large-diameter gear portion (801) that On the other hand, on the back side of the trays (7) and (71), there are rack parts (73) on both sides that extend in the direction in which the trays come in and out, as shown in Fig. 24. The pinion portion (802) of the tray drive gear (80) is always engaged with the rack portion (73).

Therefore, by selectively meshing the pair of switching gears (85) (85) of the tray drive mechanism (8) with one of the tray drive gears (80) by the operation of the mode control mechanism (6), one The tray can be driven back and forth.

Figure 22 shows the mode control mechanism (6) and the tray drive mechanism (
8) shows the connection structure with. A support shaft (88) that extends through the center hole (87) of the swing lever (86) is provided on the base plate (19), and the swing lever (86) is centered around the support shaft (88). It can be rotated in forward and reverse directions. Moreover, on the base plate (19), there are wedge parts (891) (
891) is installed so as to be able to slide in the left and right direction. The switching slide (89) switches either one of the wedge portions (891) by reciprocating.
) is a pair of protrusions (
861) (861) toward the front, thereby rotating the rocking lever (86) in the forward and reverse directions in a horizontal plane, thereby switching the power transmission path to both trays as described above.

A switching member (63) is interposed between the switching slide (89) and the slide lever (62) of the mode control mechanism (6). The switching member (63) is connected to the base plate (19).
A support shaft (67) protruding upward passes through the central hole (64) and can be rotated in forward and reverse directions, and at its eccentric position there is a first pin (65) projecting upward and a second pin protruding downward. 2 pin (66
) are formed with a predetermined opening angle from each other. The first pin (65) passes through a hole (68) in the slide lever (62), and the second pin (66) passes through a central hole (892) in the switching slide (89).

Therefore, the longitudinal movement of the slide lever (62) is converted into the lateral movement of the switching slide (89) via the switching member (63), thereby switching the power transmission path.

When the first driving slide member (4) is installed at the right moving end as shown in Fig. 15, that is, when the signal reproducing mechanism (
140) is to play the disc on the right tray (7), the slide lever (6) is pressed as shown in Figure 27.
2) is at the end of movement spaced apart from the front guide support plate (11) and rotates the switching member (63) counterclockwise, whereby the switching slide (89) is at the end of movement on the left; The left switching gear (85) and the tray drive gear (80) are meshed with each other. Therefore, in this state, it is possible to reciprocate the tray (71) on the left side of FIG. 1 (see FIG. 25).

As shown in FIG. 17, when the first driving slide member (4) moves to the approximate center of its travel, that is, when the signal reproducing mechanism (
When the switching member (140) is under the central rail member (82), the slide lever (62) moves slightly in the direction approaching the front guide support plate (11) as shown in FIG. 63) slightly clockwise, thereby moving the switching slide (89) to an intermediate position. In this state, the switching member (63) has both wedge portions (891) (891) connected to the same projecting piece (86) of the swing lever (86).
861) (861) and press the swing lever (
86) is set to an intermediate position, thereby disengaging the switching gears (85) (85) from the tray drive gears (80) (80).

Furthermore, as shown in FIG. 19, when the first driving slide member (4) moves to the left moving end, that is, the signal reproducing mechanism (1
40) is to play the disc on the left tray (71), the slide lever (6
2) is at the moving end closest to the front guide support plate (11), and the switching member (63) is further rotated clockwise, thereby moving the switching slide (89) to the right moving end. , the right switching gear (85) and the tray drive gear (80) are brought into mesh with each other. Therefore, in this state, it is possible to reciprocate the tray (7) on the right side of FIG. 1 (see FIG. 26).

As shown in FIG. 16, after the signal regeneration mechanism (140) is farthest apart below the right clamper (see FIG. 11), the engaged state shown in FIG. 29 is set for a while, and the engagement state shown in FIG. tray (7) can be driven. Also, for a while until the signal reproducing mechanism (140) is installed under the left hand rubber as shown in FIG. 18 (see FIG. 13), the engaged state shown in FIG. 27 is set.
The tray (71) on the left side of FIG. 1 can now be driven.

Also, on the front guide support plate (11), there are
As shown in Figure 6, first and second tray switches (134) and (135) are provided to detect the storage completion state and ejection completion state of each tray (7) (71), and the signals from these switches Starting and stopping of the motor (83) is controlled based on this.

13111 As shown in Fig. 25, when the signal reproducing mechanism (140) such as the pickup (100) or turntable (110) is playing the disc on the right tray (7), the right switching gear (85) and tray drive gear (85)
0), it is necessary to lock the tray (7) in the storage position. Also, as shown in Figure 26, the signal reproducing mechanism (140) is located on the left tray (71).
When the upper disk is to be played, the left switching gear (85) and the tray drive gear (80) are disengaged, so it is necessary to lock the tray (71) in the storage position. Therefore, as shown in FIG. 1, a tray lock mechanism (70) is provided on the central rail member (82).

The tray lock mechanism (70) has a support shaft (7) erected on the central rail member (82) as shown in FIG. 20 and FIG.
Tray lock member (75) rotatably supported by 8)
and recesses (74) (74) formed on both sides of the tray (7) (71) as shown in FIG. The tray lock member (75) is as shown in FIGS. 20 and 23.
A bin (76) is provided at a laterally eccentric position to protrude upward, and an engaging protrusion (77) that can engage with the recess (74) of the tray is directed toward the rear guide support plate (15). It protrudes horizontally. The pin (76) is the slide lever (62)
It engages with a notch (621) provided in the. Therefore, as the slide lever (62) reciprocates, the engaging protrusion (7)
7) rotates in the left-right direction as shown by the arrow in FIG.

In the state shown in FIG. 25, the slide lever (62) is at the end of movement on the rear guide support plate (15) side, the tray lock member (75) is rotated clockwise to the end of rotation, and the engaging protrusion ( 7
7) engages with the recess (74) of the right tray (7),
Lock the tray (7). In addition, in the state shown in FIG. 26, the slide lever (62) is at the end of movement on the front guide support plate (11) side, and the tray lock member (75) is rotated counterclockwise to the end of rotation, and the engagement protrusion (77) engages with the recess (74) of the left tray (71), and the tray (71)
) to lock.

Pickup As shown in Figure 25, a rack (105) extending in the axial direction of the guide shaft (103) is attached to the pickup (100), and the rack (105) is connected to the movable chassis (2) via a reduction gear mechanism. Upper feed motor (104)
It is connected to. Therefore, the pickup (100) is transferred along the guide shaft (103) by controlling the rotation of the feed motor (104), and the pickup (100) is transferred along the guide shaft (103).
) can perform signal reproduction.

iUni Hemostasis 11 In the disc playback device described above, as shown in FIG.
The first playback mode is clamped above and is the playback target, and the movable chassis (2) is clamped on the left side tray (71).
), and the disc on the tray is clamped on the turntable (110) to be played, and the second playback mode is realized mainly by the rotation of the movable chassis (2). disc clamp release mode,
A signal regeneration mechanism movement mode is set, which is mainly achieved by horizontal movement of the movable chassis (2). In addition, the operation of the signal reproducing mechanism movement mode includes an idle mode in which it is impossible to drive any of the trays (7) (71) during the period when the movable chassis (2) passes under the slide lever (62). exists.

In order to detect each of the above modes, a first
, second and third mode switches (131) (132) (
133), and these switches are turned on and off by first, second and third cam surfaces (43), (44) and (45) formed on the first driving slide member (4), respectively. FIG. 36 shows the front and rear positions of the slide lever (62) and the on/off states of each switch in each of the modes.

In the first playback mode shown in FIG. 15, the first mode switch (131) and the second mode switch (132)
is turned on, and the third mode switch (133) is turned off.

In the disk clamp release mode shown in FIG. 16, the first mode switch (131) and the third mode switch (133) are off, and the second mode switch (133) is off.
2) is switched from off to on. In the idle mode shown in FIG. 17, the first mode switch (131) and the second mode switch (132) are off, and the third mode switch (133) is switched from off to on. In the disk clamp release mode shown in FIG.
The first mode switch (131) is off, the third mode switch (133) is on, and the second mode switch (133) is on.
32) is switched from on to off. Furthermore, in the second playback mode shown in FIG. 19, the first mode switch (13
1) and the third mode switch (133) are on,
The second mode switch (132) is switched from off to on.

Therefore, all modes can be detected by the on/off signals from the first to third switches, and various operational controls for each of the mechanisms can be realized based on this.

Mustache 11 fraud 1 An example of the operation of the disc playback device will be described below.

In the first playback mode shown in FIGS. 1, 10, and 15, when the disc is clamped on the turntable (110), rotating the tray drive motor (83) clockwise will cause the tray ( 71) is ejected, the motor is stopped by switching the second tray switch (135), and the tray ejecting operation is completed. Tray (71
), the tray is stored in the cabinet (1) by reversing the motor (83), and the motor is stopped by switching the second tray switch (135). The storage operation is completed.

Next, when issuing an ejection command to the right tray (7),
The drive motor (31) is activated and the first drive slide member (4) is driven to the position shown in FIG. 16.

As a result, the movable chassis (2) is lowered and the disk clamp is released. Then, when the first tray switch (134) and the third mode switch (133) are turned off and the second mode switch (132) is turned from off to on (disc clamp release mode), the drive motor (31) is turned off. Stop. During this process, the slide lever (62) moves forward, which causes the tray rotor member (75) to rotate counterclockwise, causing the right tray (75) to move forward.
) to the locked state of the left tray (71). Also, at this point, the right-hand switching gear (85) as shown in FIG. 29 meshes with the tray drive gear (80), making it possible to drive the right-hand tray (7). By starting the tray drive motor (83) in this state, the tray (7) is ejected and stored, and the disc on the tray can be replaced.

From this state, when the first driving slide member (4) is further driven to the left, the movable chassis (2) moves horizontally at high speed, and in the process of passing around 1/2 of its total stroke,
As the slide lever (62) retreats from the front position to the rear position, the third mode switch (133) is switched from off to on. Also, the second mode switch (
132) is turned off, and the idle mode shown in FIGS. 12, 17, and 28 is detected.

When the first drive slide member (4) further moves to the left,
The second mode switch (132) is turned on, and as a result, the left switching gear (85) meshes with the tray drive gear (80) as shown in FIG. 27, and the left tray (71) can be driven. It has become. Therefore, it is possible to start the ejection operation of the tray (71) in this state.

Thereafter, after the second mode switch (132) is turned off, the driving motor (31) is reversed and stopped when the second mode switch (132) is turned on. As a result, the disk clamp release mode shown in FIGS. 13, 18, and 27 is set. Even in this state, the left tray (7) can be ejected and stored.

Furthermore, the first driving slide member (4) is moved to the left in FIG. 1, and when the first mode switch (131) is turned on and the second mode switch (132) is turned on, the driving motor ( 31), the second reproduction mode shown in FIGS. 14, 19, and 29 is set, and the right tray (7) can be ejected and stored.

The above operation is just an example, and various other operations can be realized. For example, after ejecting the right tray (7) in the state shown in Fig. 16, setting the state shown in Fig. 18, and ejecting the left tray (7). By performing the ejection operation (71), it is also possible to set both trays to the ejection state at the same time.

In the above disc playback device, the movable chassis (2)
The horizontal movement between the two trays (7) (71) (signal reproduction mechanism movement mode) and the lifting and lowering of the movable chassis (2) (disc clamping operation) are performed within the same vertical plane orthogonal to the tray ejection direction. Since the movement is smooth and continuous, and there is no sudden change in the direction of movement, the load when driving the movable chassis (2) is small, and the rear guide support plate of the movable chassis (2) is Smooth movement is realized by the drive mechanism provided only on the 5) side, and a simple movement guide mechanism may be provided on the front guide support plate (]1) side of the first drive slide member (4).

Therefore, not only can the load on the drive motor (31) be reduced, but also the drive mechanism for moving the signal reproducing mechanism between trays and for disk clamping operations can be extremely simple, making it possible to downsize.

However, the shape of the first guide grooves (12) and (16) for guiding the movement of the first shaft part (21) of the movable chassis (2) is formed into an arc shape that is gently curved downward, and the second Shaft part (2
The shape of the second guide groove (13) (17) that guides the movement of the chassis (2) is formed into a horizontally long U-shape to give the movable chassis (2) a unique movement as shown in Figure 8. When the chassis (2) passes under the slide lever (62), the signal reproducing mechanism (140) is lowered to the lowest position, and the amount of rotation of the movable chassis (2) necessary for disc clamping is lowered. was set as small as possible.

This makes it possible to make the entire device thinner.

Further, by providing the mode control mechanism (6), it becomes possible to switch and drive both trays with a single motor (83), thereby simplifying the device configuration and reducing the weight.

Further, the transfer direction of the pickup (100), that is, the axial direction of the guide shaft (103), and the rotation axis of the movable chassis (2), that is, the axial direction of the second shaft portion (22) (22) are parallel to each other. Since it is set, pick up (100
) Regardless of the position of the pickup (100
) and the turntable (110), a good operational feeling can be obtained when replacing the disc.

The above description of the embodiments is for illustrating the present invention, and should not be construed to limit or reduce the scope of the invention described in the claims.

Further, it goes without saying that the configuration of each part of the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the technical scope of the claims.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing the overall configuration of a disc playback device according to the present invention, FIG. 2 is a perspective view seen from the rear of FIG. 1, and FIG. 3 is an exploded perspective view of a movable chassis guide mechanism. Fourth
The figure is a perspective view of the movable chassis drive mechanism, Figure 5 is an enlarged perspective view of the main part of Figure 4, Figure 6 is a perspective view of the second drive slide member, and Figure 7 is the first drive slide member. 8 is a rear view showing a series of movements of the movable chassis and signal reproducing mechanism, FIG. 9 is an explanatory view of the deceleration effect by the second guide groove of the rear guide support plate, and FIGS. 10 to 14 is a rear view of the advancement showing the operation of the movable chassis drive mechanism, 1st
5 to 19 are a series of plan views corresponding to FIGS. 10 to 14, FIG. 20 is a perspective view of the mode control mechanism and tray drive mechanism, and FIG. 21 is a perspective view of the tray drive motor and swing pulley mechanism. An enlarged perspective view, FIG. 22 is an exploded perspective view of the mode control mechanism and tray drive mechanism, FIG. 23 is a perspective view of the tray locking member, and FIG. 24 is a perspective view showing the back side of the tray.
25 and 26 are plan views showing the drive states of the left and right trays and the position of the signal reproducing mechanism, respectively;
7 to 29 are a series of plan views showing the power transmission path switching operation of the tray drive mechanism; FIGS. 30 to 32 are a series of plan views showing the operation of the movable chassis lock mechanism;
3 to 35 are front views corresponding to FIGS. 30 to 32, respectively, and FIG. 36 is a timing chart showing each device mode and the switching states of the first to third mode switches. (75)...Tray lock member (80)...Tray drive gear (83)...Motor mechanism (14)...Lock hole (110)...Turntable switch (74)... Recess (8)...Tray drive mechanism (82)...Central rail member (9)...Movable chassis lock (93)...Lock shaft (100)...Pickup (131)...No. 1 mode switch (132)... 2nd mode switch (133)... 3rd mode switch (11)... Front guide support plate (12) (16)... 1st guide groove (2)... Movable Chassis (4)...First drive slide (5)...Second drive slide (6)...Mode control mechanism (7) (71)...Tray (15)...Rear guide support plate (13) (17)...Second guide groove (3)...Driving mechanism door member (62)...Slide lever (70)...Tray rotor mechanism No. 35

Claims (1)

[Claims] [1] Pickup (100) and turntable (1
selectively moving the signal reproducing mechanism (140) including 10) to a first reproducing position and a second reproducing position on the same surface;
In a disc playback device capable of reproducing signals from a disc set in both playback positions, the signal playback mechanism (
140), a guide support mechanism that guides the reciprocating movement of the movable chassis (2) in a vertical plane passing through both the reproduction positions, and a guide support mechanism that guides the movable chassis (2) along the guide support mechanism. a movable chassis drive mechanism that reciprocates by reciprocating the movable chassis (
a first guide support part that guides the attitude change of the movable chassis (2) until one end on the moving direction side of the movable chassis (2) is at approximately the same height and the other end is lowered to a second attitude; and a signal regeneration mechanism. From the third posture of the movable chassis (2) with (140) set at the second playback position, the movable chassis (
a second guide support part that guides the attitude change of the movable chassis (2) until one end on the moving direction side of the movable chassis (2) is at approximately the same height and the other end is lowered to a fourth attitude; 2) A third guide support section that guides movement in a substantially horizontal direction between the second attitude and the fourth attitude. [2] The guide support mechanism for the movable chassis (2) includes two guide support plates (11) and (15) that are erected in front and back across the vertical movement surface of the movable chassis (2). Each of the support plates (11, 15) is provided with a first guide groove (12) (16) extending substantially horizontally on one of the playback positions, and a horizontal section on the other playback position. (13a
) (17a) and vertical parts (13b) (13c) (17b) (17c) that bend from both ends of the horizontal part and extend upward.
second guide grooves (13) (17) are formed, and the first shaft parts (21) (21) and second shaft parts (22) (22) protruding from the movable chassis (2) are connected to the first shaft parts (21) (21) and second shaft parts (22) (22). Guide groove (12)
2. The disc playback device according to claim 1, wherein the disc playback device is slidably engaged with the second guide groove (16) and the second guide groove (13) and (17). [3] The first guide grooves (12) (16) are formed in an arc shape that gently bulges downward, and the first shaft portions (21) (21
) passes through a substantially intermediate position of the first guide groove (12) (16), and the second shaft portion (22) (22) passes through the second guide groove (13).
(17), the signal reproducing mechanism (140) is set at the lowest position during the travel, halfway between the first reproducing position and the second reproducing position. 3. The disk playback device according to claim 2, wherein the disk playback device passes under a fixing member installed on both the guide support plates (11) and (15) at the position. [4] The movable chassis drive mechanism has one guide support plate (1
The drive slide member (4) includes a drive slide member (4) installed to be slidable in the horizontal direction along the drive slide member (4), and a driving mechanism (3) for reciprocating the drive slide member (4). ) includes a second shaft portion (2) of the movable chassis (2).
2) into which the V-shaped groove (51) is fitted, and the slope of the V-shaped groove (51) allows the vertical portion (17b) ( 3. The disk reproducing apparatus according to claim 2, wherein the disk reproducing apparatus is driven along the line 17c).