JPH0487061A - Disk reproducing device - Google Patents

Abstract

PURPOSE:To quickly eject the disks regardless of the position of a pickup set at ejection of a disk by setting the rotary shaft of a mobile chassis in parallel or approximately in parallel to the transfer direction of the pickup. CONSTITUTION:A rotary shaft C of a chassis 2 is set in parallel or approximately in parallel to the transfer direction B of a pickup 100. Therefore both a turntable 110 and the pickup 100 can be turned from a tray transfer path when the chassis 2 is turned by a prescribed angle regardless of the position of the pickup 100 set at ejection of a disk. Thus it is possible to start the drive of a tray and to quickly eject the disks with the position of the pickup 100 kept as it is at ejection of the disk.

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 method for clamping a disc on a turntable in a disc playback device, a sub-chassis is pivotably supported on a fixed chassis so as to be movable up and down, and the disc is placed at a certain height from the fixed chassis. A method is known in which a clamp mechanism is provided, a turntable provided on the sub-chassis is raised, and the disc is clamped to the upper disc clamp mechanism (for example, Japanese Patent Laid-Open No. 63-304
480 (GlIB21/12)).

FIG. 38 shows an example of the configuration of a conventional disc playback device employing the above-mentioned disc clamp method, in which a pickup (100) and a turntable (110) are arranged on a movable chassis (2), and the movable chassis (2) The shaft portions (220) (2;!0) protruding from both rear ends are pivoted to the pair of support plates (Ilb) (15b), and
A shaft part (210) protruding from the front end of the movable chassis (2)
) is driven up and down by a drive mechanism (not shown), and the movable chassis (2) is rotated as indicated by arrow A in the figure. The pickup (100) is reciprocated in the direction of arrow B, that is, in the direction orthogonal to the rotation axis C of the movable chassis (2).

Further, a disk to be clamped on the turntable (110) is reciprocated in the direction of the arrow in the figure by a disk tray and tray drive mechanism (not shown), and the disk is loaded and ejected.

(Problem to be Solved) In a conventional disc playback device, when ejecting a disc, the pickup (100) is first moved to the moving end on the turntable (110) side, and then moved to the movable chassis (2). Rotate the turntable (11) downward.
0) and the pickup (100) were evacuated from the tray transition path. The movable chassis (2) moves the pickup (100) toward the turntable (110).
This is to avoid interference between the pickup (100) and the tray by setting the descending distance of the pickup (100) as large as possible as the pickup (100) rotates.

Therefore, if the pickup (100) is set at a position apart from the turntable (110) when ejecting the disk, there is a problem in that the start of the disk ejecting operation is delayed by the time taken to transport the pickup (100).

The purpose of the present invention is to provide a pickup (10
0) To provide a disc playback device capable of quickly ejecting a disc regardless of the position.

(Means for Solving the Problems) As shown in FIG. 37, the disc playback device according to the present invention rotates the rotation axis C of the chassis (2) in a direction perpendicular to that of the conventional device, that is, the direction in which the pickup (100) is moved. It was installed parallel or substantially parallel to direction B.

(Function) Regardless of the position of the pickup (100), the distance from the rotation axis of the movable chassis (2) to the pickup (100) is constant, and that distance is the same as the rotation axis C in the conventional device.
This is equivalent to the distance between the pickup (100) and the pickup (100) which is the maximum distance away from the turntable (110).

Therefore, the descending distance of the pickup (100) when the movable chassis (2) is rotated by a certain angle in the six directions of arrows is the same as the descending amount of the turntable (110) regardless of the position of the pickup (100). be.

(Effects of the Invention) According to the disc playback device according to the present invention, the turntable (110) can be rotated by rotating the movable chassis (2) by a predetermined angle regardless of the position of the pickup (100) when the disc is ejected. Since the pickup knob (100) can be retracted from the tray transfer path, the tray drive can be started and the disk can be quickly ejected while maintaining the position of the pickup (100) when ejecting the disk. .

(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 the front, the tray storage direction is the rear, and the left and right directions are the left and right directions in each drawing used for the description.

As shown in Figure 1, the planned λ Outline 1 composition 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) supports a movable chassis (2) 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 (11) installed on a movable chassis (2) as shown in Figure 2.
1) is fixed to the output shaft and driven to rotate 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 the two.

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),
The pickup (100
) is guided to reciprocate in the disk radial direction. The pickup (100) includes a pickup transfer mechanism (10
1) are linked, 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, whereas 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). ) It is attached to a support member (122) fixed to (82) so as to be able to move up and down within a certain range and freely rotate, thereby forming a disk clamp mechanism (120). The disk clamp mechanism (120) employs a magnetic system in which a 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 (12) on the left side of each of the arc-shaped guide grooves (12) that gently bulge downward and curve. )(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) (16a) have short horizontal portions (12b) (12c) (16b) (16c) at both ends. Also, the vertical portions (13b) (13c) on both sides of the horizontal portions (13) (17) of the second guide grooves (13) (17).
(17b) (17c) are the first guide grooves (12) (1
6) A circular arc portion (13d) that is slightly inclined in a direction away from the horizontal portion and the vertical portion has a relatively thick radius of curvature.
They are smoothly connected by (13e), (17d), and (17e).

On both sides of the movable chassis (2), there are first holes projecting forward and backward, respectively.
Shaft part (21) (21) and second shaft part (22) (22)
are formed, the first shaft portions (21) (21) are formed in the first guide grooves (12) (16), and the second shaft portions (22) (22) are formed in the second guide grooves (13) (17). is slidably engaged with. A sub-chassis (102) is installed on the movable chassis (2) via a vibration isolating member (106), and the above-mentioned guide shaft (103) (
A signal reproducing mechanism (140) consisting of a pickup (103), a pickup (100), a pickup transport mechanism (101), a turntable (110), etc. is provided. Therefore, as shown in FIG.
) will move while swinging from side to side. That is, at the left moving end in FIG. 8, the first shaft portion (21) of the movable chassis (2)
It is located at the left end of the first guide groove (16) of the second shaft (
22) is located at the left end of the second guide groove (17), and the movable chassis (2) maintains a horizontal posture. 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 reach the first axis (
21) comes into contact with the right end of the first guide groove (16), and the second
The shaft portion (22) comes into contact with the right end portion of the second guide groove (17), and the movable chassis (2) returns to the 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.

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 base member (18) is provided on the base member (18) and extends in the longitudinal direction. A protrusion (181) is formed, and a rear guide support plate (15) of the protrusion (181)
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. Each of the first cam surfaces (43) has two convex portions (431) (433) and two concave portions (432) (434), and the second cam surface (44)
) has 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). On these cam surfaces are first, second and third mode switches (131) (described later).
132) and (133) are respectively engaged, thereby performing mode detection. Further, a positive cam part (42) is recessed in the upper surface of the rack part (41), and 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.

Further, as shown in FIGS. 4 and 5, a second drive slide member (5) is engaged on the base member (I8) 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 driving 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 to the first guide position ( 12) (16) and second guide groove (13)
(17). Figures 10 to 1
FIG. 4 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 part (22) of the movable chassis (2) is pressed down against the slope of the figure-7 groove (5I) as shown in Fig. 11. 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 7-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 bays (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
2 is greatly decelerated from the speed V, 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 circumferential 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).

Rotating Chassis Lock As described above, the reciprocating movement of the movable chassis (2) is achieved by the second drive slide member (5) provided on the rear guide support plate (15), which allows the movable chassis (2) to move back and forth through the second shaft portion (22) of the movable chassis (2). When the movable chassis (2) is installed at the moving end for signal reproduction as shown in FIG. 10 or 14, the forward guiding support of the movable chassis (2) as shown in FIG. The second shaft portion (22) on the plate (11) side 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) as shown in FIG.
is provided.

As shown in Fig. 3, the movable jar 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 (
13) Square lock holes (14) (14) opened close to the left side of both vertical parts (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). At the end on the 11) side, there is a square shaft-shaped opening/shaft part (93) that can be fitted into the lock hole (14) with a slight margin.
is installed protrudingly. Movable chassis (2) and mouth/tuck members (
91) and the spring (90) as shown in Figures 3 and 25.
is stretched, and the lock member (91) is attached to the rear guide support plate (1).
5) It is biased toward 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 opened and locked, and the load acting on the lock shaft (93) is transferred through the opening and locking hole (14).
It will be supported by the wall.

At this time, the two first shaft parts (21
) (21) is the first guide groove (12) (16
) is supported by the horizontal portions (12b) (16b) of
As shown in Fig. 5, the load acting on the 7-shaped groove (51) is supported by the horizontal part (51c), and
) 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 locking 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 driving 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 inserting into the opening/pocket 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) touches the pressed shaft (9) of the locking member (91) as shown in FIG.
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 again as shown in Fig. 35, it hits the lock shaft (93) or 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) has a central portion pivoted (611) on the rear guide support plate (15), and a cam follower (612) provided at the lower end that connects 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 process of driving the movable chassis from FIG. 10 to FIG. It shows the movement of surfaces (43), (44), and (45). As the first drive slide member (4) moves to the left, the rotary lever (61) 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 801) and a pinion part (802) provided integrally with the pinion part (802).

On the other hand, on the back side of the trays (7) and (71), rack parts (73) extending in the direction of tray ejection and retrieval are formed on both sides as shown in FIG. ) are always in mesh.

Therefore, by selectively meshing the pair of switching gears (85) (85) of the tray drive mechanism (8) with one of the tray drive gears (8o) 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 the forward and reverse directions. Moreover, on the base plate (19), there are wedge parts (891) (8
A switching slide (89) with a switch 91) is installed so as to be slidable in the left-right direction. The switching slide (89) is
Due to its reciprocating movement, one of the wedge portions (891)
is a pair of protrusions (86) provided at both ends of the swing lever (86).
61) (861) toward the front, thereby rotating the swinging lever (86) in the horizontal plane in forward and reverse directions, 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 center hole (64) and can be rotated in forward and reverse directions, and at its eccentric position there are a first bottle (65) projecting upward and a second bottle projecting downward. 2 bottles (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 into 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) equally abutting both protrusions (861) (+361) of the swing lever (86), and the switching member (63) is set to an intermediate position, thereby both switching gears (85) (85) and tray drive gear (80') (
80") has been disengaged.

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.

Tray lock As shown in Fig. 25, when the signal reproduction mechanism (140) of the pickup (100), turntable (110), etc. or the disc on the right tray (7) is to be played, the right switching gear (85) ) and tray drive gear (8
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 bottle (76) is a 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 four parts (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.

1 In the above-mentioned disc playback device, 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) are arranged, 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.
It will be turned off. 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 1 Supervision 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 switched 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.
) changes 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, which engages either the left switching gear (85) or the tray drive gear (80) as shown in Fig. 27, allowing the left tray (71) to 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, in the state of Fig. 16, the right side)
), and then set the state shown in FIG. 18 and perform the ejection operation of the left tray (71). It is also possible to set both trays to the eject 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 (15) of the movable chassis (2) is Smooth movement is realized by the drive mechanism provided only on the ) side, and a simple movement guide mechanism may be provided on the front guide support plate (11) 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 a circular arc shape that is gently curved downward, and Part (22
) The shape of the second guide groove (13) (17) that guides the movement of the movable chassis (2) is formed into a horizontally long U-shape to give the movable chassis (2) a unique movement as shown in Fig. 8. (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) required for disc clamping is reduced. It 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 portions (22) (22) are parallel to each other. Since it is set, pick up (100)
Regardless of the position of the pickup (100) during disk ejection operation, the slight rotation of the movable chassis (2)
Since the turntable (110) can also be retracted, 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, the configuration of each part of the present invention is not limited to the above embodiments, and various modifications can be made within the technical scope of the claims.

For example, the present invention can be implemented in a single-type playback device capable of playing back one disc as shown in FIG. 37. In this device, the first shaft portions (21) (21) protruding forward and backward from the left end of the movable chassis (2) are pivoted to a pair of support plates (11a) and (15a), and the movable chassis The second shaft portions (22) (22) are slidably engaged with the elongated holes (13f) (17f') of the support plates (lla) (15b) before and after the right end of (2).

A driving slide member (4a) is attached to the rear support plate (15a).
is provided, thereby driving the second shaft portion (22) up and down, thereby rotating the movable chassis (2) in the direction of the arrow in the figure. The pickup (100) is reciprocated in the direction of arrow B, that is, in a direction parallel to the rotation axis C of the movable chassis (2).

Further, a disk to be clamped on the turntable (110) is reciprocated in the direction of the arrow in the figure by a disk tray and tray drive mechanism (not shown), and loading and unloading operations of the disk are performed.

Of course, the effects of the present invention can also be obtained with this device.

[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 tray drive motor and swinging booby mechanism. 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, FIG. 24 is a perspective view showing the back side of the tray,
25 and 26 are plan views showing the driving states of the left and right trays and the position of the signal reproducing mechanism, respectively, and FIGS. 27 to 29 are a series of plan views showing the power transmission path switching operation of the tray drive mechanism. 30 to 32 are a series of plan views showing the operation of the movable chassis locking mechanism, FIGS. 33 to 35 are front views corresponding to FIGS. 30 to 32, respectively, and FIG. 36 is a series of plan views showing the operation of the movable chassis locking mechanism. FIG. 37 is an exploded perspective view showing another embodiment of the present invention, and FIG. 38 is a perspective view of a conventional device. (11)...Front guide support plate (15)...Rear guide support plate (12) (16)...First guide groove (13)
) (17)... Second guide groove (2)... Movable chassis (3)... Drive mechanism (4)... First drive slide member (5)... Second drive slide member ( 6)...Mode control mechanism (62)...Slide lever (7) (71)...Tray (70)...
・Tray lock mechanism (74)... recess (
75)...Tray lock member (8)...Tray drive mechanism (80)...Tray drive gear (82)...Central rail member (83)...Motor (9)...Movable chassis Lock mechanism (93)...Lock shaft (14)...Lock hole (100)...Pickup (110)...Turntable (131)...First mode switch (132)... Second mode switch (133)...Third mode switch m-th release

Claims (1)

[Claims] (1) A turntable (110) and a pickup (10) that is reciprocated in the radial direction of the turntable are mounted on a movable chassis (2) that can rotate up and down about a horizontal axis.
0), the movable chassis (2) is raised, and the disc on the turntable (110) is pressed against and clamped by the disc clamp mechanism (120). A disk reproducing device characterized in that it is installed parallel or substantially parallel to the transport direction of the pickup (100).