JPH0487060A - Mobile object transfer mechanism for signal reproducer - Google Patents

Abstract

PURPOSE:To quickly and smoothly change the moving direction of a mobile object by forming a 1st guide groove extending in the 1st direction at an initial position of transfer and also a 2nd guide groove including a 2nd groove part extending in the 2nd direction after bending at the end of a 1st groove part extending in the 1st direction at a position of reproduction respectively. CONSTITUTION:In a process when a mobile object moves toward a 1st direction from its initial position, a 1st axis part 21 slides along a 1st guide groove 16 and at the same time a 2nd axis part 22 slides along a 1st groove part 17a of a 2nd guide groove 17. When the part 22 moves into an arc part 17d of the groove 17, the moving direction of the part 22 is gradually turned to the 2nd direction from the 1st direction. In this process the velocity component of the part 22 set in the 1st direction is gradually reduced. Then the part 22 has finally a contact with the termination of the inner wall of the groove 16 at a speed approximate to zero. Under such conditions, the part 22 slides along a 2nd groove part 17b of the groove 17 and at the same time the mobile object moves in the 2nd direction. Then the mobile object stops at the position of reproduction. Thus the moving direction of the mobile object can be quickly and smoothly changed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a signal reproducing device for reproducing signals from a signal recording medium such as a compact disc or a cassette tape.

(Prior Art) Conventionally, a disc playback device is known that can selectively play back one of two discs arranged side by side using a single pickup. This device pivots a subchassis on a fixed chassis so as to be rotatable in a horizontal plane and rotatable in a vertical plane, and rotates a signal reproducing mechanism installed on the subchassis in a horizontal plane to generate a first signal. The disc is moved downward between the playback position and the second playback position, and then rotated upward along a vertical plane to clamp the disc and perform signal playback (Japanese Patent Laid-Open No. 63-304480 (G11B21/1
2) ).

(Problem to be Solved) However, in the above disc playback device, the direction of the signal playback mechanism is abruptly changed from moving in the horizontal direction to moving in the vertical direction. When switching, the signal reproducing mechanism collides with the horizontal moving end due to inertial force, causing an impact noise.

To prevent this, it is necessary to slow down the rotation of the motor that drives the signal regeneration mechanism at the end of horizontal movement.
This causes a problem in that it takes time to reach the signal reproduction position.

An object of the present invention is to move a movable body equipped with a signal recording medium or a signal reproducing mechanism (140) from an initial position in a first direction, and then move it in a second direction different from the first direction. In a signal reproducing device that conveys a signal to a predetermined signal reproducing position, by devising the shape of the guide groove that guides the movement of the movable body, it is possible to It is an object of the present invention to provide a movable body conveyance mechanism in which a speed component in one direction gradually decreases, impact noise accompanying a change in direction is suppressed, and the direction of movement can be quickly and smoothly changed.

(Means for Solving the Problems) A movable body transport mechanism of a signal reproducing device according to the present invention moves a movable body mounted with a signal recording medium or a signal reproducing mechanism (140) from an initial position in a first direction and in a second direction. The mechanism transports the signal reproducing movable body to a predetermined signal reproducing position through directional movement, and includes a guide support mechanism that guides the reciprocating movement of the signal reproducing movable body, and a drive mechanism that drives the movable body reciprocatingly along the guide support mechanism. It is equipped with

As shown in FIG. 9, the movable body guide support mechanism includes a guide support plate (15) installed along the movement path of the movable body. A first guide groove (16) extending in the first direction is formed, and a first groove part (17a) extending in the first direction is formed on the playback position side.
) and a second groove (17b) that is bent from the terminal end of the first groove and extends in the second direction.
are formed, and the first groove part (17a) and the second groove part (17a) are formed.
b) are connected by a smooth circular arc portion (17d). The first guide groove (16) and the second guide groove (17) are provided with first shaft portions (21) protruding from both ends in the moving direction of the movable body.
) and the second shaft portion (22) are slidably engaged with each other. Further, the radius of curvature R of the outer circumferential wall of the circular arc portion (17d)
is formed larger than the diameter of the second shaft portion (22).

(Function) In the movable body, the first shaft portion (21) and the second shaft portion (22) are guided by the first guide groove (16) and the second guide groove (17) of the guide support plate (15), Continuously moves from the initial position to the signal playback position.

In the process of moving from the initial position in the first direction, as shown in FIG. 9, the first shaft part (21) slides along the first guide groove (16), and the second shaft part (22) 2 guide grooves (17)
The movable body moves at a relatively high speed V according to the operation of the drive mechanism.

After that, when the second shaft part (22) enters the arc part (17d) of the second guide groove (17), the moving direction of the second shaft part (22) gradually changes from the first direction to the second direction. During this process, the velocity component of the second shaft portion (22) in the first direction gradually decreases. Therefore, the first guide groove (
16) is gradually decelerated in accordance with a decrease in the velocity component of the second shaft portion (22) in the first direction, and finally the movement speed V2 of the first guide groove (16) is reduced at a speed close to zero. It will touch the end of the inner wall.

In this state, by sliding the second shaft part (22) along the second groove part (17b) of the second guide groove (17), the movable body moves in the second direction and reaches the regeneration position. Stop.

(Effects of the Invention) According to the movable body transport mechanism of the signal reproducing device according to the present invention,
When changing the moving direction of the movable body from the first direction to the second direction, the first shaft part (21) will not collide with the end of the first guide groove (16) at high speed, so that the direction The impact noise accompanying the change is suppressed, and the direction of movement can be changed quickly and smoothly.

(Example) Hereinafter, an example in which the present invention is implemented in a disc playback device will be described in detail with reference to 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 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 support plates (11) and (15) are installed at the front and rear of the cabinet (1), respectively, and both guide support plates (11)
A movable chassis (2) is supported by (15) 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),
These guide shafts allow pickup (Ioo
) 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, 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). ) 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 Russian Federation, the front guide support plate (11) and the rear guide support plate (15) each have a first guide groove in the form of an arc that gently swells downward and curves on the left side. (12) (16)
, On the right side, there are horizontally long U-shaped second guide grooves (13) (17).
has been established. The first guide grooves (12) and (16) have short horizontal portions (
12b) (12c) (16b) (16c). In addition, the horizontal part of the second guide groove (13) (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 part (21) (21) and second shaft part (22) (22)
are formed, and the first shaft part (21") (21) is connected to the first guide groove (12) (16), and the second shaft part (22) (22)
are slidably engaged with the second guide grooves (13) and (17). A vibration isolation member (106) is mounted on the movable chassis (2).
A sub-chassis (102) is installed through the sub-chassis (102), and the aforementioned guide shaft (103) is attached to the sub-chassis (102).
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. 8, there is a movable chassis (2) and a signal reproducing mechanism (140) on the chassis. , from the lower position of one clamper (121) to the other clamper (
121) while swinging from side to side. That is, at the left end of movement in FIG.
15) is located at the left end of the first guide groove (16), and the second
The shaft portion (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, then returns to a substantially horizontal position,
In this position, it passes under the center rail member (82), lowers its left side again, takes a largely tilted position, and finally reaches the first
The shaft (21) abuts the right end of the first guide groove (16), the second shaft (22) abuts the right end of the second guide groove (17), and 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.

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) extends in the longitudinal direction on the base member (18). 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) (
447) and three recesses (442) (444) (446
), and each of the third cam surfaces (45) has one convex portion (45
1) and a recess (452). These cam surfaces are provided with first, second and third mode switches (131), which will be described later.
(132) and (133) are respectively engaged, whereby mode detection is performed. 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.

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 binion 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 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 drive 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), exactly 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 horizontally at a relatively high speed V, but the movable chassis moves horizontally at a relatively high speed V.
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).
In the process of sliding on the horizontal part (16b) of 6), the moving direction of the second shaft part (22) gradually changes from the horizontal direction to the vertical direction, so that the first shaft part (21) at this time The moving speed V is greatly reduced from the speed V, and the first shaft portion (2
1) 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).

As described above, the reciprocating movement of the movable chassis (2) is achieved by moving the movable chassis (2) back and forth through the second shaft portion (22) of the movable chassis (2) by means of the second driving slide member (5) provided on the rear guide support plate (15). 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 jar roof ivy mechanism (9) as shown in FIG.
is provided.

As shown in FIG.
91) and the second guide groove (13) of the front guide support plate (11).
) are provided with rectangular lock holes (14) (14) opened close to the left sides of both vertical parts (13b) (13c), respectively.

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.
1), the second drive slide member (5) is inserted through the second shaft portion (22) at the end on the rear guide support plate (15) side.
Pressed shaft portion (92) that can emerge from the 7-shaped groove (51)
is provided protrudingly, and a square shaft-shaped lock shaft portion (93) that can be fitted into the lock hole (14) with a slight margin is provided protrudingly from the end on the front guide support plate (11) side. There is. A spring (90) is stretched between the movable chassis (2) and the lock member (91) as shown in FIGS. 3 and 25, and the lock member (91) is attached to the rear guide support plate (15) side. It is strong.

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) (54) are respectively located at the horizontal portion (51b)
It protrudes inward so as to cover (51c). 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 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 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), as shown in FIG. 6, the horizontal portion (51b) of the figure-7 groove (51) (51c
) are formed with protruding parts (51d) and (51e) slightly upwardly protruding at the end on the V-shaped part (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.
represents the operation of fitting into the opening/pocket hole (14) of the front guide support plate (11).

As shown in Fig. 33, the movable chassis (2) is tilted greatly, and the lock shaft (93) of the lock member (91) is inserted into the opening/pocket hole (
14), the pressing piece (54) touches the pressed shaft part (91) of the locking member (91) as shown in FIG.
92), the lock shaft portion (93) maintains a non-contact state with the front guide support plate (11). after that,
As shown in Fig. 34, when the movable chassis (2) is in a slightly elevated position compared to the horizontal position, the lock shaft (93) floats a short distance from the lower wall of the lock hole (14). As shown in FIG. 31, the pressing piece (54) presses the pressed shaft (92) to fit 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, 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.
4), and the lock shaft portion (93) remains fitted into the lock hole (14).

As mentioned above, the movable chassis (2) is once lifted slightly above the horizontal position, and the opening/tuck member (91
) fits into the lock hole (14), the lock shaft (93) will not get caught on the lower opening edge of the lock hole (14), and the insertion operation can be performed reliably. It will be done.

The mode and tray mode control mechanism (6) includes a rotary lever (6) extending vertically along the rear guide support plate (15) 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 movable chassis driving process 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 with each other.

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 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 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) equally abutting both protrusions (861) (861) of the swing lever (86), and the switching member (63)
86) is set to an intermediate position, thereby both switching gears (85) (85) and tray drive gears (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 Cun Rubber as shown in FIG. 18 (see FIG. 13), the anastomotic 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.

-Llz I'' Jin and pseudo 1 As shown in Figure 25, when the signal reproducing mechanism (140) such as the pickup (100), turntable (110), etc. is reproducing the disc on the right tray (7), , right side 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. As shown in FIGS. 20 and 23, the tray locking member (75) has a pin (76) projecting upward at a laterally eccentric position, and a locking member that can engage with the recess (74) of the tray. A mating convex portion (77) is provided to protrude horizontally toward the rear guide support plate (15). The pin (76) is attached to the slide lever (62
) is engaged with a notch (621) provided in the hole. Therefore,
As the slide lever (62) reciprocates, the engagement protrusion (
77) 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.

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.

Hige U cliff 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 locking member (75) to rotate counterclockwise and 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 (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 second guide grooves (13) and (17) for guiding the movement of the movable chassis (2) are formed into a horizontally long U-shape.
By applying the unique movement as shown in the figure, when the movable chassis (2) passes under the slide lever (62), the signal reproducing mechanism (140) is lowered to the lowest position and the disc is The amount of rotation of the movable chassis (2) required for clamping is 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.

For example, the present invention can be implemented not only in a disc playback device but also in a cassette tape transport mechanism in a video tape recorder or the like.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing the overall configuration of a signal reproducing device according to the present invention, FIG. 2 is a perspective view seen from the rear of FIG. 1,
Figure 3 is an exploded perspective view of the movable chassis guide mechanism, Figure 4 is a perspective view of the movable chassis drive mechanism, Figure 5 is an enlarged perspective view of the main parts of Figure 4, and Figure 6 is the second drive mechanism. FIG. 7 is a perspective view of the first driving slide member, FIG. 8 is a rear view showing a series of movements of the movable chassis and signal reproducing mechanism, and FIG. 9 is a second guide of the rear guide support plate. 10 to 14 are rear views showing the operation of the movable chassis drive mechanism, and FIGS. 15 to 19 are a series of planes corresponding to FIGS. 10 to 14. 20 is a perspective view of the mode control mechanism and tray drive mechanism, FIG. 21 is an enlarged perspective view of the tray drive motor and swing pulley mechanism, and 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 lock member, Fig. 24 is a perspective view showing the back side of the tray, and Fig. 24 is a perspective view of the tray lock member.
5 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. , FIGS. 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 lock mechanism. 5 is a timing chart showing switching states of modes and first to third mode switches. (7) (71)...Tray (74)...Recess (8)...Tray drive mechanism (82)...Central rail member (9)...Movable jar top (93)...Lock Shaft portion (100)...Pickup (131)...First mode switch (132)...Second mode switch (133)...Third mode switch (70)...Tray lock mechanism (75)...・Tray lock member (80)...Tray drive gear (83)...Motor vine mechanism (14)...Lock hole (110)...Turntable switch (11)...Front guide support plate ( 12) (16)...First guide groove (2)...Movable chassis (4)...First drive slide (5)...Second drive slide (6)...Mode control mechanism ( 15) Rear guide support plate (13) (17) Second guide groove (3) Drive mechanism door member (62) Slide lever No. 85

Claims (1)

[Claims] (1) Signal recording medium or signal reproducing mechanism (140
) is moved from an initial position in a first direction, and then moved in a second direction different from the first direction to convey the movable body to a predetermined signal reproduction position. The transport mechanism includes a guide support mechanism that guides the reciprocating movement of the movable body, and a drive mechanism that reciprocates the movable body along the guide support mechanism, and the movable body guide support mechanism is configured to move along the movement path of the movable body. Guide support plate installed along the (
15), a first guide groove (16) extending in the first direction is formed on the initial position side of the guide support plate (15), and a first guide groove (16) extending in the first direction is formed on the playback position side. A second groove part (17a) that extends from the first groove part (17a) and a second groove part (17b) that bends from the terminal end of the first groove part and extends in the second direction.
A guide groove (17) is formed, the first groove part (17a) and the second groove part (17b) are connected by a smooth arc part (17d), and a first shaft part protrudes from both ends in the direction of movement of the movable body. (21) and the second shaft portion (22) are connected to the first guide groove (16).
) and the second guide groove (17), respectively, and the radius of curvature of the outer circumferential wall of the arcuate portion (17d) is formed to be larger than the diameter of the second shaft portion (22). A movable body transport mechanism for a signal recording and reproducing device, characterized in that: