JPH0677374B2 - Optical disk device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an optical disk device for reproducing signals from signal surfaces formed on both surfaces of an optical disk or recording signals on both surfaces of the optical disk, and particularly for signal recording. Alternatively, the present invention relates to a device for transferring a reproducing pickup in the radial direction of the disc.

(Prior Art) In a general optical video disc reproducing apparatus,
When playing back signals recorded on both sides of an optical disk, it is necessary to take out the disk from the device when the signal playback on one side is completed, turn the disk over, and load it into the device again to play the other signal side. . Therefore, there is a problem that the operation is tedious and complicated.

On the other hand, there has been proposed a device capable of continuously reproducing a signal from both signal surfaces without turning the disc over (Japanese Patent Laid-Open No. Sho 61-206).
57-169936 (G11B7 / 12)). The apparatus is equipped with a crank arm (161) on a transfer device (164) including a rotation mechanism (162) and a feed mechanism (163) as shown in FIG.
A pickup (160) for signal reproduction is provided at the tip of the arm. In the device, an optical disc (10)
The spindle motor (21) rotates the spindle at high speed, and the feed mechanism (163) operates to pick up (160)
Is moved in the radial direction of the disc to reproduce the signal surface of the disc, and after the reproduction of one side of the disc is completed, the rotation mechanism (162) drives the crank arm (161) to rotate 180 degrees, thereby picking up (160). Is reversed toward the other side of the disc. Therefore, both sides of the disc can be continuously reproduced by a single pickup.

Incidentally, in the optical disc of the video disc device, it is standardized to provide a recording portion for various code signals such as a lead-in code and a lead-out code at a predetermined position on the disc signal surface for controlling the reproducing operation of the device. Has been done. For example, the lead-in code is recorded across several hundred tracks (lead-in recording section) on the innermost circumference of both signal surfaces,
The start point of the video signal recording portion to be reproduced is detected by reading the code with the pickup.

(Problems to be solved) To perform faithful signal reproduction in an optical disk device,
The tracking operation of the pickup needs to be performed with high accuracy, and therefore the pickup must move accurately while maintaining a predetermined height on the radial line of the optical disc. However, in the above conventional device, the transfer device (16
4) has two driving mechanisms that operate differently, that is, a rotating mechanism (16
2) and the feed mechanism (163) are connected, and the pickup is supported not only to reciprocate but also to move and rotate. Therefore, as the degree of freedom of movement of the pickup increases, the positioning accuracy of the pickup increases. Inevitable,
It was extremely difficult to accurately position the pickup on the radial line of the disc by reversing the crank arm.

(Means for Solving the Problems) A first object of the present invention is to provide an optical disc device capable of reproducing signals from both sides of the disc or recording signals on both sides of the disc. It is an object of the present invention to provide a transfer device having a simple structure that can transfer accurately.

The second object of the present invention to be solved at the same time is to provide the above first object.
With the optical disk device configured to achieve the purpose of
When the reproducing surface or recording surface is switched from one side of the disc to the other side in order to continuously reproduce the signal from both sides of the disc or to record the signal continuously to both sides of the disc, the pickup (31), after reversing the disc, It is an object of the present invention to provide a configuration that allows the lead-in recording unit provided on the innermost peripheral portion to move to a facing position.

The optical disk device according to the present invention has a pickup (31) for reproducing a signal from the optical disk or recording a signal on the optical disk mounted on a support base (30) and having a spindle motor (21) at a predetermined position of a chassis. Is provided with a guide mechanism (5) for guiding the movement of the support base (30), and the support base (30) is linked to the conveying means and moved on the guide mechanism (5).

The guide mechanism (5) is provided in parallel to each other with the disc rotation surface sandwiched between the pair of linear movement guide portions for guiding the pickup (31) along the disc radial line, and the disc outer peripheral sides of the both linear movement guide portions. And an arc-shaped guide portion that connects the ends of each other to each other.

The support base (30) is transported by the support base (30).
A pair of leads for detecting whether or not the feed motor (40) for conveying the disc along the guide mechanism (5) and the pickup (31) are installed at positions facing the innermost peripheral portion of the disc signal surface. An in-switch (97) (98) and a motor control circuit (193) for controlling the rotation of the feed motor (40) based on the detection signal are provided, and a reproduction surface or a reproduction surface is formed from one signal surface of the disk to the other signal surface. When switching the recording surface, the feed motor (40) is driven to invert the support base (30) through the arcuate guide portion of the guide mechanism (5), and then linear movement or the inner circumference of the disc is guided along the guide portion. It moves to the moving end on the side.

(Operation) The support base (30) reciprocates along each guide portion of the guide mechanism (5) by the operation of the conveying means. After the signal reproduction or recording on one side of the disc is completed, the support base (30) equipped with the pickup (31) is conveyed in one direction on the guide mechanism (5) when the reproduction or recording operation of the other side is started. Is
It reverses through the arc-shaped guide portion and moves to a position facing the signal surface.

The carrier means of the support base (30) drives the feed motor (40) until the lead-in switch arranged on the signal surface side to be reproduced after turning the support base (30) is turned on, and then the support base (30). ) Is conveyed along the linear movement guide portion of the guide mechanism (5), and the pickup (31) is installed at a position facing the innermost peripheral portion of the disc signal surface. After that, the motor control circuit (193) reversely rotates the feed motor (40),
The pickup (31) is moved to the outer peripheral side of the disc, the lead-in code is first read from the lead-in recording section, and then the start point of the signal recording section to be reproduced or recorded is detected based on the code, The reproduction of the recording section is started.

(Advantages of the Invention) In the pickup transfer device according to the present invention, the support base (30) having the pickup (31) and the guide mechanism (5) only reciprocate in one direction. Unlike the device, the guide mechanism (5) has a simple structure because it does not rotate in the circumferential direction of the disk. Further, it is easy to accurately dispose the guide mechanism (5) at a predetermined position of the chassis to which the disk drive motor is attached, which allows the movement path of the support base (30) to be precisely on the disk radius line. It is possible to match. However, the pickup (31) is directly fixed to the support base (30). As a result, the pickup (31) moves accurately while maintaining a predetermined height on the disc radius line.

Of course, as described above, even when the signal is reproduced from both sides of the disc (10) or the signal is recorded on both sides of the disc, the pickup (31) is set to the other side after the reproduction and recording of one side are completed. Since the lead-in code can be read by being transferred to the position facing the innermost peripheral portion of the signal surface, it is possible to continuously perform reproduction and recording on both sides of the disk.

(Embodiment) FIGS. 1 to 29 show an optical video disk reproducing apparatus equipped with a pickup transfer device according to the present invention.

First, the outline of the video disc reproducing apparatus will be described.

As shown in FIG. 2, a rotation drive device (2) for an optical disk (10) is arranged inside a cabinet (1) formed in a flat rectangular parallelepiped shape, and the rotary drive device (2) is arranged so as to face the device. A circuit board (on which a pickup device (3) and a guide mechanism (5) constituting the pickup transfer device of the invention are arranged, and electric circuits such as a control circuit, a tracking control circuit, and an image signal processing circuit of these devices are formed ( 9) is equipped. Further, the disc tray (71) on which the optical disc (10) is to be mounted has an opening (1) provided on the front panel (11).
It is reciprocally driven by a loading mechanism, which will be described later, so that it can be retracted in and out of the disk drive, and a disk ejection position where a disk can be placed and taken out and a disk storage position above the disk drive device (2).

A main chassis (13) shown in FIG. 16 is arranged inside the cabinet (1), and a sub-chassis (14) shown in FIG. 17 is fixed to a substantially central portion of the main chassis (13). .

As shown in FIG. 1, a disk drive device (2) including a spindle motor (21) and a turntable (22) is attached to the subchassis (14), and the pickup device is opposed to the drive device (2). (3) and a guide mechanism (5) are provided.

The pickup device (3) is equipped with a pickup (31) composed of an optical system including a semiconductor laser and an objective lens at a substantially central portion of a support base (30).

As is well known, in a video disc reproducing apparatus, the optical axis of the pickup (31) is jumped to the inner or outer peripheral side of the disc during the vertical blanking period of the reproduced video signal to reproduce a still image and double speed. Special reproduction such as reproduction is performed. This jump operation can be achieved by using various known means such as an electromagnetic drive system in which a permanent magnet is arranged in a movable part including an objective lens and the magnet is driven by a drive coil. When the reading beam is swung to jump the tracks to be reproduced by a predetermined number of tracks, a control signal having a magnitude corresponding to the predetermined number of track widths is sent to the jump control circuit connected to the drive coil.

The pickup device (3) is equipped with a self-propelled mechanism (4) including a gear mechanism arranged on both sides of the support base (30) and a feed motor (40) for driving the gear mechanism.

The guide mechanism (5) includes left and right guide rails (51) (52) each formed in a U shape. The two guide rails (51) and (52) are parallel to each other as shown in FIGS. 2 and 5, and each of the guide rails is also parallel to the disk radius line D extending in the disk tray movement direction. (14) It is fixed to the top.

Each of the guide rails (51) (52) has a downward linear movement guide portion A extending horizontally below the disc (10) set on the turntable (22) and the disc (10) as shown in FIG. An upper linear movement guide portion B extending horizontally above
It is composed of an arcuate guide portion C that connects both guide portions A and B. Therefore, the pickup device (3) reproduces the back surface of the disc (10) while being guided by the downward linear movement guide portion A, and then is reversed by passing through the arc-shaped guide portion C and is inverted to the upper surface side of the disc (10). It is possible to reproduce the surface of the disk while moving to and being guided by the upper straight guide portion B.

In addition, in order to fix the upper straight guide portion B at a predetermined position,
As shown in the figure, fix the top chassis (17) on both guide rails (51) (52), and then further attach the top chassis (17).
The end portion of is fixed to a frame (18) supported on the main chassis (13).

In order to guide the linear movement of the pickup device (3) more accurately, as shown in FIGS. 1, 6 and 18, the linear movement of the guide rail onto the top chassis (17) and the sub-chassis (14). An upper guide pole (6) and a lower guide pole (61) are supported in parallel with the guide portion. On the other hand, in the support base (30) of the pickup device (3),
As shown in FIG. 12, a slide groove (35) having an arcuate cross section is formed to allow the guide pole to penetrate therethrough. When the pickup device (3) reproduces a signal, the slide groove (35) slides on the peripheral surfaces of the guide poles (6) and (61), which prevents rattling during linear movement and improves tracking accuracy. Is planned.

Load an optical disc in the video disc playback device,
The operation when the signal is reproduced will be described with reference to FIGS. 28 (a) to 28 (d).

After placing the disc (10) on the disc tray (71) ejected from the cabinet (1) as shown in FIG. 28 (a),
The disc tray (71) is housed in the cabinet by driving a loading mechanism described later (FIG. 28 (b)).
As a result, the disc tray (71) enters the space at the center of the guide mechanism (5), and the disc (10) moves to the disc storage position on the rotation shaft of the disc drive device (2) in the cabinet. Next, the chucking mechanism, which will be described later, is driven to lower the disc tray (71), thereby setting the disc (10) to the disc device position on the turntable (22) of the disc drive device (2) (28th). Figure (c)). After that, the disc drive (2) rotates the disc (10) at a high speed, and the feed motor (40) drives the pickup device (3) to reciprocate to reproduce the disc (10) ( First
Figure 28 (d)).

Next, the configuration of each part of the video disc reproducing apparatus will be described in detail.

The support base (30) of the pickup device (3) comprises a sub base (34) having a pickup (31) mounted on a main base (33) provided with a self-propelled mechanism (4) as shown in FIG. Deployed and configured.

As shown in FIGS. 3 and 4, the self-propelled mechanism (4) is a left gear mechanism that is provided on the left guide rail (51) side of the main base (33) and is driven by a feed motor (40).
It is composed of a left gear mechanism arranged on the right guide rail (52) side and a right gear mechanism connected via a connecting shaft (47). The left gear mechanism is the first to fifth gears (41) (42) (43)
(44) (45) and the left drive gear (46), the feed motor (40) is rotated by the first gear (4) fixed to the motor shaft.
1) to the large gear portion (42a) of the second gear (42), the small gear portion (42b), the large gear portion (43a) of the third gear (43), the small gear portion (43b), the fourth gear ( It is transmitted to the left drive gear (46) via the large gear portion (44a) and the small gear portion (44b) of 44) and the large gear portion (45a) and the small gear portion (45b) of the fifth gear (45).
In addition, the right gear mechanism includes the fifth gear (45) and the connecting shaft (47).
And a right drive gear (49) meshing with the gear. The small gear portion (45b) and the sixth gear (48) of the fifth gear, and the left drive gear (46) and the right drive gear (49) are designed to have the same specifications, respectively.
Each pivot of the left drive gear (46) and the right drive gear (49) is on a line E which passes through the center of the pickup (31) and is orthogonal to the movement path D of the pickup (31) as shown in FIG. It is provided in accordance with.

As shown in FIG. 3, the left roller (140) and the right roller (141) are rotatably attached to the rotary shafts of the left drive gear (46) and the right drive gear (49), respectively. Further, the leading roller (1) is provided at the same height position as the right roller (141) in front of the side wall of the main base (33) on the right guide rail (52) side.
04) is pivotally supported.

As shown in FIG. 10, the sub-base (34) is pivotally supported (138) (138) on the main base (33) in the vicinity of the right and left drive gears (49) (46). The pivotal support has pins (34a) (34a) protruding parallel to the rotary shaft of the drive gear on both sides of the sub-base (34) and fitted into the recesses of the main base (33) as shown in FIG. At the same time, the pin (34a) is pressed down by the leaf spring (139).

The optical axis of the pickup (31) needs to be maintained perpendicular to the signal surface of the optical disc, but if the disc itself is deformed, the optical axis of the pickup (31) is corrected so that The base (33) has a sub-base (3
A tilt mechanism (103) is provided for slightly rotating the sub-base (34) by slightly rotating the pin (4) around the pin (34a). The tilt mechanism (103) includes a main base (3
3) A cam body (135) formed integrally with a drive gear (134) pivotally supported on the cam body (1) and a cam body (1) projecting from the sub-base (34).
A cam follower (137) that engages with a spiral cam groove (136) recessed in 35) and a gear mechanism (133) such as a worm gear (132) that transmits the rotation of the motor (131) to the drive gear (134). ) And the sub-base (3
It is composed of an optical sensor (130) for detecting the inclination of 4) and an electric circuit (not shown) for converting a detection signal of the sensor into a drive control signal for the motor (131).

Further, as shown in FIG. 12, on the back surface of the pickup device (3), the upper guide pole (6) and the lower guide pole (6) are provided.
1) Sliding groove (3
5) is longly recessed in the moving direction of the pickup device (3). Therefore, when the pickup device (3) moves along the linear movement guide portion of the guide mechanism (5), the slide groove (35) is moved to the lower guide pole (61) or the upper guide pole (as shown in FIG. 6). You will be guided in horizontal movement by fitting in 6),
The pickup (31) moves from the disc (10) at a predetermined height position without rattling.

The left guide rail (51) and the right guide rail (52) constituting the guide mechanism (5) are each formed in a U shape as shown in FIGS. 1, 7, 8, and 9. ing.

The left guide rail (51) has a left rack portion (53) with which the left drive gear (46) of the self-propelled mechanism (4) meshes over the entire lengths of the linear movement guide portions A and B and the arc-shaped guide portion C. ) Is formed, and the left roller (140) of the pickup device (3) is fitted over the entire length of the arc-shaped guide portion C and a part of both linear movement guide portions A and B, and a U-shaped left guide. A groove (55) is formed.

On the other hand, on the right guide rail (52), the right roller (141) and the leading roller (104) of the self-propelled mechanism (4) are provided over the entire lengths of the linear movement guide portions A and B and the arc-shaped guide portion C. A right guide groove (56) to be fitted is formed, and the right drive gear (49) of the pickup device (3) extends over the entire length of the arcuate guide C and a part of both linear movement guides A and B. A right rack portion (54) that meshes is formed.

The pickup device (3) is conveyed by driving the left drive gear (46) with respect to the left rack part (53) when moving the lower linear movement guide part for signal reproduction. At this time, the right roller (141) and the leading roller (104) are guided by the right guide groove portion (56), and the slide groove (35) slides on the lower guide pole (61). Therefore, the pickup device (3) smoothly reciprocates even when only the left drive gear (46) is driven. Therefore, as shown in FIG. 5, the pickup (31) has a radial line D of the disc (10).
It moves exactly, without falling off the top.

When the reproduction of the upper surface is completed after the reproduction of the rear surface of the disc (10), as shown in FIGS. 8 and 9, the pickup device (3) slips out of the lower guide pole (61) and the left roller. At the same time that the (140) fits into the left guide groove (55), the right drive gear (49) meshes with the right rack (54). Therefore, in the pickup device (3), the three rollers (140) (141) (104) have their respective guide groove portions (55) (5).
Driven by both drive gears (46) and (49) with respect to both rack parts (53) and (54) while being guided by 6), ascends to the disk upper surface side along the arcuate guide part C as shown in FIG. And flip. In this process, the pickup device (3)
Is not guided by the guide pole, but both drive gears (46) and (49) drive the respective rack portions (53) and (54), so that a reliable raising operation is performed.

By further transporting the inverted pickup device (3) toward the center of the disc, the slide groove (35) is fitted into the upper guide pole (6) (Fig. 6), and the left roller (14)
0) and the right drive gear (49) separate from the left guide groove portion (55) and the right rack portion (54), respectively. Therefore, thereafter, in the pickup device (3), the right roller (141) and the leading roller (104) are guided by the right guide groove portion (56), and the slide groove (35) slides on the upper guide pole (6). While driving the left drive gear (46) to the left rack part (53)
The signal is reproduced on the upper surface of the disk (10) by being conveyed by the drive of. Also in this case, the pickup device (3) smoothly reciprocates under the guidance of the upper guide pole (6), and the pickup (31) does not come off from the disc radius line.

As shown in FIG. 13, the sub chassis (14) and the top chassis (17) are provided with limit switches (hereinafter referred to as SW and SW) that detect when the pickup device (3) reaches the moving end on the inner circumference side of the disc. Lower lead-in SW (98)
And an upper lead-in SW (97). On the other hand, as shown in FIG. 12, a projection piece (36) for operating the lead-in SWs (97) (98) is formed on the bottom of the pickup mounting (3).

FIGS. 14 and 15 show the mounting structure of the right guide rail (52) to the sub chassis (14). The right guide rail (52) is entirely made of synthetic resin, and both ends of the rack portion (54) are projecting pieces (57) (58) projecting from the guide rail main body in which the guide groove portion (56) is formed. And the hooks (57a) (58a) are provided at the tips of the protrusions (57) (58). Further, notches (57b) (58b) are formed in the outer peripheral side of the rack portion at the base end portions of the projecting pieces (57) (58).
Therefore, the projecting pieces (57) (58) can be elastically deformed in the opening direction.

Further, the positioning pins (59a) (59) are provided on the upper end surface and the lower end surface of the linear movement guide portions A and B of the right guide rail (52).
b) are projected respectively.

On the other hand, the top chassis (17) and the subchassis (14) are provided with locking holes (102a) (102b) for locking the hooks (57a) (58a) of the projecting pieces (57) (58), and Small holes (120a) (120b) into which the positioning pins (59a) (59b) are fitted are described at predetermined positions, respectively.

As shown in FIG. 15, the right guide rail (52) fits the positioning pins (59a) (59b) into the small holes (120a) (120b), and each chassis (14) (17) by screws (122). )
Fixed to. Further, the projecting pieces (57) (58) are elastically deformed in the opening direction, respectively, so that the hook portions (57a) (58b) are locked in the locking holes (102a) (102b) of each chassis. As a result, both ends of the right rack portion (54) are held in a state of being expanded outward from the pick circle at the center of the rack.

Therefore, when the pickup device (3) shifts from the linear movement guide portion of the guide rail to the arc-shaped guide portion,
When the right drive gear (49) starts to mesh with the end portion of the right rack portion (54), the tooth depth of the tooth surface of the right drive gear (49) and the right rack portion (54) is initially shallow. Since the depth of removal is deeper, the shock at the start of meshing is reduced.

As shown in FIG. 16, a sub chassis (14) is fixed at a predetermined position in the center of the main chassis (13). The left side frame (15) and the right side frame (16) are fixed to both sides of the main chassis (13), and the support frame (18) is provided at the substantially central position of the upper ends of both side frames (15) and (16).
Is erected. The support frame (18) is fitted to pins (124) (124) integrally molded at predetermined positions on the upper ends of both side frames (15) (16) to be positioned with respect to the main chassis (13). , It is fixed to both side frames (15) (16) by screws (123) (123).

The top chassis (17) is fixed on the left guide rail (51) and the right guide rail (52) fixed on the sub chassis (14) as described above.
The end of 7) is fitted to a pin (125) integrally molded at a predetermined position of the support frame (18) to be positioned with respect to the main chassis (13), and screws (123) (123)
It is fixed to the support frame (18) by.

With the above structure, the left guide rail (51) and the right guide rail (52) can be accurately fixed to the sub chassis (14) at predetermined positions with high rigidity.

As shown in FIG. 17, the sub chassis (14 has a motor mounting frame (66) that defines the mounting position of the spindle motor (21) and a pole support for supporting the base end of the lower guide pole (61). The base (65) is formed by integral molding of total resin, and as shown in Fig. 18, the lower guide pole (6
1) fit the base end into the pole support base (65),
The tip portion is fixed on the sub chassis (14) by a screw (67) with a spacer (62) sandwiched between the tip part and the sub chassis (14). The upper guide pole (6) is fixed to the top chassis (17) with screws by sandwiching spacers (63) (64) between both ends of the pole and the top chassis (17).
As a result, the upper guide pole (6) and the lower guide pole (61) are supported at a predetermined height above each chassis (17) (14) in an accurate posture parallel to the disk radius line. .

Next, the loading mechanism (7) and the chucking mechanism (8) will be described with reference to FIGS. 19 to 27.

The loading mechanism (7) horizontally conveys the disc (10) together with the disc tray (71), and the disc ejection position shown in FIG. 2 and the disc storage position at the inner part of the latter tray holder (73) are located at two positions. It can move back and forth between them. As shown in FIGS. 19 and 20, the tray holder (7
A pair of guide rollers (74a) are provided on the inner surfaces of both side plates of 3).
(74b) is projected inward. On the other hand, as shown in FIGS. 21 and 22, guide grooves (17) into which the guide rollers (74a) (74b) are fitted are provided on both sides of the disc tray (71).
1) (172) is recessed. As a result, the disc tray (71) is guided to reciprocate on the tray holder (73).

As shown in FIG. 20, the tray holder (73) is provided with a loading motor (70) and a loading gear (79) linked to the motor. On the other hand, on the back surface of the disc tray (71), as shown in FIG. 22, a rack (180) meshing with the loading gear (79) is formed along the moving direction of the disc tray (71). Therefore, the disc tray (71) has the loading motor (70).
Driven by, it appears and disappears from the opening (12) of the front panel (11).

The tray holder (73) includes a tray-out switch (93) and a tray-out switch (93) that detect the states of the disc tray (71) when the disc tray (71) moves to both moving ends in the projecting and retracting direction, that is, the disc ejecting position and the disc storing position.・ In SW (94) is provided. On the other hand, as shown in FIG. 21, the disc tray (71) is provided with both SW (93) (94)
Pins (177) and (178) for respectively operating the are projected downward.

The chucking mechanism (8) moves the tray holder (73) holding the disc tray (71) up and down to move the disc on the disc tray (71) back and forth between two positions, a disc storage position and a disc device position. Along with
At the disc mounting position, the disc retainer (81) described later
The disk (10) is clamped onto the turntable (22) of the disk drive device (2) by means of.

As shown in FIG. 19 and FIG. 20, a pair of slide shafts (78a) (78b) are respectively provided on both side walls of the tray holder (73) so as to project outward, and each slide frame (15) (16 )
Describes a pair of vertical guide holes (182a) (182b) into which the slide shafts (78a) (78b) are slidably fitted. Therefore, the tray holder (73) is supported on the main chassis (13) so as to be able to move up and down.

Loading plates (72) are provided on the outer surfaces of the left and right side frames (15) and (16), respectively, as shown in FIGS. 19 and 23. The loading plate (72) is provided with a pair of slide pins (185a, 185b) protruding toward the side frames (15, 16). On the other hand, the vertical guide holes (182a) (182b) are provided in the side frames (15) (16).
A pair of horizontal guide holes (181a) (181b) into which the slide pins (185a) (185b) are slidably fitted are provided in the vicinity of the upper part of each. Thereby, each loading plate (72) is supported so as to be reciprocally movable in the horizontal direction with respect to the side frames (15) (16).

In addition, as shown in FIG. 23, the loading plate (72) has cam grooves (183) each having a high cam portion, a low cam portion, and an inclined cam portion connecting the both cam portions, as shown in FIG.
a) (183b) is opened, and the slide shaft (7
The tips of 8a) and (78b) penetrate. Furthermore, in the center of the loading plate (72), the side frame (15)
A long hole (184) through which a pivot (111) protruding from (16) penetrates is opened horizontally.

As shown in FIG. 20, both side frames (15) (16) are used to reciprocally drive the pair of loading plates (72).
A pair of chucking gears (88) (88) that are rotatably connected to each other are pivotally supported at the lower end of the
Both gears (88) (88) are rotationally driven by a chucking motor (80) arranged on the back surface of the main chassis (13). On the other hand, as shown in FIG. 23, a rack member (108) with which the chucking gear (88) meshes is fixed to the loading plate (72).

Therefore, by driving the chucking motor (80), both loading plates (72) are moved to the position shown in FIG. 24 (a).
As shown in (b), it will reciprocate in the horizontal direction at the same time. The left side frame (15) has a tray up to detect both moving ends of the loading plate (72).
The SW (95) and the tray down SW (96) are arranged, and the tray holder (73) is provided with a pair of projecting pieces (186) (187) for operating these SW (95) (96).

As shown in FIG. 24 (a), when the disc tray (71) is ejected, the loading plate (72) is located at the moving end on the front panel (11) side. Further, in the tray holder (73), the slide shafts (78a) (78b) are in sliding contact with the high-order cam portions of the cam grooves (183a) (183b),
It is in sliding contact with the upper ends of the vertical guide grooves (182a) (182b) and is located at the upper moving end.

After the disc tray (71) is housed in the tray holder (73) by the driving of the loading motor (70), the chucking motor (80) is driven to drive the disc tray (71) as shown in FIG. 24 (b). Move the loading plate (72) to the back of the device. During this process, the slide shaft (78a) (7
8b) is moved to the lower moving end along the vertical guide grooves (182a) (182b) by driving the cam grooves (183a) (183b), and the slide shafts (78a) (78b) are The sliding contact is made with the lower cam portions of the cam grooves (183a) (183b) and with the lower end portions of the vertical guide grooves (182a) (182b).

As a result, the disc tray (71) is
3) and descends, and as shown in FIG. 28 (c), the disc (10) is placed on the turntable (2) of the disc drive (2).
2) Set above, the disc tray (71) is held at a position lower than the disc (10).

In order to hold the disc (10) on the turntable (22), the tray holder (73) is equipped with the clamp member (82) that constitutes the chucking mechanism (8) as shown in FIGS. 19 and 20. To be done.

The clamp member (82) includes a disc holding plate (81) pivotally supported by a bearing (87) in the central portion,
It has a pair of arms (83) (83) on both sides. The base end of each arm (83) is provided with a U-shaped groove (85) into which the support shaft (76) protruding outward from the tray holder (73) is fitted, and at the arm tip, A cam surface (84) extending in an arc shape on the vertical surface is formed. The clamp member (82)
As shown in FIG. 26, a spring (86) stretched between both arms (83) and the tray holder (73) biases the shaft (76) downward, and The cam surface (84) is in sliding contact with the slide pin (185b) protruding from the loading plate (72).

Therefore, as shown in FIG. 26 (a), the loading plate (72) is located at the moving end on the front panel (11) side,
When the tray holder (73) is located at the rising end, the arm (83) is driven by the pin (185b) with respect to the cam surface (84) to move to the counterclockwise rotating end against the spring (86). is there. From this state, as shown in FIG. 26 (b), when the loading plate (72) moves to the back of the apparatus and the tray holder (73) descends, the arm (83) moves with the movement of the pin (185b). The arm (83) is held in a substantially horizontal posture by being rotated clockwise by the urging force of the spring (86).

As a result, as shown in FIG. 27, the disc retainer (81) provided on the clamp member (82) presses the disc (10) downward at its central portion. As a result, the disc (10) is clamped between the disc holding plate (81) and the turntable (22),
The spindle motor (21) is surely driven to rotate.

As shown in FIG. 21, the front panel (11) is provided with a door (110) for opening and closing the opening (12). The door (110) is driven by a door opening / closing mechanism (101) described below.
The disc tray (71) is opened when it is ejected from the opening (12), and is closed after the disc tray (71) is housed in the cabinet (1).

As shown in FIGS. 24 (a) and 24 (b), the door opening / closing mechanism (101) swings the door (110) pivotally supported by the front panel (11) in conjunction with the chucking mechanism (8). It is driven by a lever (112).

As shown in FIG. 23, the lever (112) has a pivot hole (1
15), a long hole (113) in the center and a U-shaped groove (11
4) have. The pivot (115) of the lever (112) has the pivot (11) protruding from the left side frame (15).
The tip end of 1) is fitted and the tip end of the slide shaft (78a) projecting from the tray holder (73) is engaged with the long hole (113).

On the other hand, as shown in FIG. 25, the door (110) has arms (118) projecting from both ends, and a pivot pin (116) provided at the base end of the arm is supported by the front panel. It can rotate around the support pin in an angle range of about 90 degrees. Arm (11
A drive pin (117) is projectingly provided at the tip of 8), and the drive pin (117) is engaged with the U-shaped groove (114) of the lever (112). Therefore, as shown in FIGS. 24 (a) and 24 (b), the door (110) is opened / closed by the lever (112) meeting as the tray holder (73) moves up and down.

As shown in FIG. 21, the disc tray (71) has an opening (107) through which the turntable (22) of the disc drive device (2) is exposed. On the surface of the disc tray (71), a large disc mounting portion (175) having a diameter of approximately 30 cm and a small disc mounting portion (176) having a diameter of approximately 20 cm are formed, and the large disc mounting portion (175) is provided. A window (170) is opened for hanging a finger on the end of the small-diameter disc when taking it out.

Further, on both sides of the disc tray (71), there are notches (173) (174) through which the outer peripheral end of the large disc mounting part (175) is exposed when the large-diameter disc is mounted. It is provided. Therefore, when the disc is taken out from the disc tray (71), it is possible to put a finger on the end of the disc protruding from the notches (173) and (174), so that the disc take-out operation is easy.

With the disc tray (71) ejected from the cabinet (1), the large disc mounting portion (175) has an opening (12).
Not completely exposed and the rear edge remains inside the cabinet (1), but the opening (12) in the front panel (11) is
As shown in FIG. 21, the upper edge (12a) has an arcuate shape that bulges upward, which facilitates the loading and unloading of the disc on the disc tray (71).

FIG. 29 shows an electric circuit for operating the mechanism of the video disc reproducing apparatus.

Operations such as loading and chucking are performed by the system controller (9
1) controlled by. System controller (9
The input port of 1) has a key input device (92) equipped with various operation keys such as a power key and a PLAY key, the tray-out SW (93), the tray-in SW (94), and the tray-up SW.
(95), tray down SW (93), upper lead-in SW (9
7) and lead-in SW (98) are connected. or,
The output port of the system controller (91) is for displaying an operating mode such as "loading" on the CRT to be connected to the video disc playback device and the display device (90) provided on the front panel. Motor control for sending drive signals to the display control circuits (99) (109) that generate video signals, the loading motor (70), the chucking motor (80), the spindle motor (21), and the feed motor (40), respectively. Circuit (190) (19
1) (192) (193) are connected. The rotation of the spindle motor (21) is detected by a rotation detection circuit (194) including a photocoupler arranged on the turntable (22), and the detection signal is detected by the system controller (9).
Connect to the input port of 1).

Next, an operation example of the electric circuit will be outlined with reference to FIGS. 30 to 33. Incidentally, FIG. 30 is a reproduction mode setting operation from power-on to a normal reproduction mode, FIG. 31 is a stop operation, FIG. 32 is an eject operation, and FIG. 33 is a reproduction surface changed from a disc lower surface to an upper surface. This shows the reverse reproduction operation at that time.

(1) Playback mode setting operation (Fig. 30) When the power key on the key input device (92) is turned on,
The stop operation shown in FIG. 31 is executed. The system controller (91) first determines whether the lower lead-in SW (98) is ON (213), and if it is OFF, drives the feed motor (216) and turns the spindle motor OFF (21
7) Then, return to the judgment (213). Pickup device (3)
Moves to the innermost periphery of the signal surface below the disc (10) and the lower lead-in SW (98) turns on, the feed motor turns off.
(214) After that, it is confirmed (215) that the spindle motor (21) is completely stopped, the mode is shifted to the stop mode, and the operation of the eject key is awaited.

As shown in Fig. 30, when the eject key is turned on (20
1), unloading operation is executed. That is, the system controller (91) operates the motor control circuit (190) and drives the loading motor (70) until the tray out SW (93) is turned on, as shown in FIG. 28 (a). The disc tray (71) is ejected from the cabinet (1).

After placing the disc (10) on the disc tray (71),
When you turn the PLAY key (ON) (204), the tray-in SW (9
4) Drive the loading motor (70) until it turns on (20
5) Then, as shown in Fig. 28 (b), the disc tray (7
Store 1) in cabinet (1).

When the tray-in SW (94) is turned on (206), the system controller (91) operates the motor drive circuit (191) to drive the chucking motor (207) until the tray-down SW (96) is turned on. ), And lower the disc tray (71) as shown in FIG. 28 (c). As a result, the disc (10) is mounted on the disc drive device (2).

When the tray down switch (96) is turned on (208), the system controller (91) causes the spindle motor (21) to rotate, and the rotation detection circuit (194) indicates that the rotation speed of the motor has reached 1800 rpm. After detecting (209) and further detecting the lead-in recording section provided on the inner circumference of the disk (210), the jump control circuit is operated (211),
After the lead-in code written in the lead-in recording section is read at high speed and the lead-in recording section is exited (21
2) Switch to normal playback mode.

In the normal reproduction mode, the motor control circuit (193) and the signal reproduction circuit (not shown) are operated to drive the feed motor (40) to move the pickup device (3) while the signal is transmitted from the rotating disc (10). To play.

When the signal reproduction on one side of the disk (10) is completed, the spindle motor (21) is switched to the reverse rotation and the feed motor (40) is switched to the high speed rotation, so that the pickup device (3) as shown in FIG. Is quickly moved from the lower linear movement guide portion A to the upper linear movement guide portion B via the arcuate guide portion C. The pickup device (3) is an upper lead-in SW
Move the upper linear movement guide B until (97) turns ON,
It reaches the innermost part of the signal surface of the disc (10).

After that, the motor control circuit (193) and the signal reproduction circuit are operated again, and the feed motor (40) is driven to move to the outer peripheral side of the pickup device (3) disc,
The signal surface of the disc is reproduced.

(2) Stop operation (Fig. 31) and eject operation (Fig. 31)
(Fig. 32) When the STOP key is turned ON during signal reproduction, the stop operation shown in Fig. 31 is executed as described above.

Also, as shown in Fig. 32, if the eject key is turned on,
First, after the stop operation (218) is executed and the signal reproduction is stopped, the chucking motor (80) is driven (221) until the tray up SW (95) is turned on, and the chucking motor (80) is driven (221) in FIG. 28 (b). Raise the disc tray (71) as shown in. As a result, the disc (10) is separated from the disc drive device (2).

When the tray up switch (95) turns on (220), the system controller (91) turns on the tray out switch (93).
Drive the loading motor (224) until
8 The disc tray (71) is ejected from the cabinet (1) as shown in FIG. Tray out SW (93) is ON
Then, the loading motor (70) and the chuck motor (80) are turned off (222) (223). As a result, the disc (10) can be taken out.

(3) Reverse reproduction operation (Fig. 33) For example, when the key for instructing reproduction of the upper surface is operated during reproduction of the lower surface of the disc, first, the display control circuit (99)
(109) is activated, the CRT image display is interrupted, and the CRT is
"J-turn" is displayed on the screen and the screen of the display device (90). In addition, after the spindle motor (21) is rotated in the reverse direction, the feed motor (40) is rotated at high speed until the upper lead-in SW (97) is turned on, so that the pickup device (3) is moved to the inner peripheral portion of the disc upper surface. Move quickly towards.

When the upper lead-in SW (97) turns on (227), confirm that the spindle motor (21) has reached 1800 rpm (229)
Then, after detecting the lead-in recording portion provided on the inner circumference of the disc (230), the jump control circuit is operated (231) to quickly read the lead-in code and escape from the lead-in recording portion ( 232), it is determined whether or not the normal playback mode is set (233). In the case of the normal playback mode, the display indicating the normal playback mode is displayed on the CRT, and the mute operation of the screen is turned off. Move to. If it is determined in the judgment (233) that the program reproduction mode is set, the CRT is displayed and the program reproduction mode is entered. In the program reproduction mode, the feed motor (40) is controlled according to a preset program, and the signals are reproduced in a predetermined order from the plurality of image recording units formed on the disc.

The configuration of each part of the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made within the technical scope described in the claims.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a pickup transfer device according to the present invention, FIG. 2 is a perspective view showing the external appearance of a video disk reproducing device, and FIG. 3 is a plan view showing a main part of the pickup transfer device. FIG. 5 is a left side view of the self-propelled mechanism, FIG. 5 is a plan view showing the positional relationship between the pickup device and the guide mechanism with respect to the optical disc, FIG. 6 is a front view of the pickup transfer device, and FIG. 8 is a side view showing
The figure is a perspective view showing the main parts of the pickup device and the guide mechanism, FIG. 9 is a perspective view of the device of FIG. 8 seen from a different direction, FIG. 10 is a perspective view of the pickup device, and FIG. Sectional view, FIG. 12 is a perspective view of the pickup device as seen from the back side, FIG. 13 is a side view showing a position where a pair of lead-in switches are arranged, and FIG. 14 is an exploded perspective view of a right guide rail.
FIG. 15 is a sectional view showing the assembly structure of the right guide rail to the chassis, FIG. 16 is a perspective view of the main chassis and the sub chassis, FIG. 17 is a perspective view of the sub chassis, and FIG. 18 is a guide pole mounting structure. FIG. 19 is a partially cutaway side view showing, FIG. 19 is a plan view showing a chucking mechanism, FIG. 20 is a main chassis,
FIG. 21 is an exploded perspective view of the tray holder and the clamp member, FIG. 21 is a perspective view of the disc tray removed from the cabinet, FIG. 22 is a rear view of the disc tray constituting the loading mechanism, and FIG. 23 is an exploded perspective view showing the chucking mechanism. Fig. 24 is a side view showing the operation of the loading plate. Fig. 25 is an exploded perspective view showing the main part of the door opening / closing mechanism.
FIG. 26 is a view showing the operation of the chucking mechanism as viewed from the inside of the main chassis, FIG. 27 is a partially cutaway side view showing a disk chucking state, and FIG. FIG. 29 is a block diagram showing an electric circuit for explaining a series of operations until completion of king, FIG.
FIG. 33 to FIG. 33 are flowcharts showing the operation of the electric circuit, and FIG. 34 is a side view showing the structure of the conventional pickup transfer device. (10) …… Optical disc, (21) …… Spindle motor (30) …… Support base, (31) …… Pickup (40) …… Feed motor, (5) …… Guide mechanism (51) …… Left guide Rail, (52) …… Right guide rail (13) …… Main chassis, (14) …… Sub chassis (17) …… Top chassis, (18) …… Support frame (11) …… Front panel, (107 ) …… Opening (110) …… Door, (112) …… Lever (7) …… Loading mechanism (71) …… Disc tray, (173) (174) …… Notch (8) …… Chucking mechanism (80) …… Chucking motor (81) …… Disk holding plate

Claims (1)

[Claims] 1. An optical disc apparatus comprising a pickup (31) for reproducing signals from both sides of the optical disc or recording signals on both sides of the optical disc, wherein the pickup (31) is mounted on a support base (30). A guide mechanism (5) for guiding the movement of the support base (30) is arranged at a predetermined position of a chassis to which a spindle motor (21) for rotating and driving an optical disk is attached, and the support base (30) is conveyed. The guide mechanism (5) is moved in a linked manner to the means, and the guide mechanism (5) is arranged in parallel to each other with the disc rotation surface interposed therebetween to guide the pickup (31) along the disc radial line. The support base transporting means includes a support base (30) as a guide mechanism (5), and a linear movement guide part and an arcuate guide part that connects the ends of the two linear movement guide parts on the outer peripheral side of the disk to each other. Along A feed motor (40) for conveying and a pair of lead-in switches (97) (98) for detecting whether or not the pickup (31) is installed at a position facing the innermost peripheral portion of the disc signal surface. And a motor control circuit (193) that controls the rotation of the feed motor (40) based on the detection signal, and when the reproduction surface or recording surface is switched from one signal surface of the disc to the other signal surface of the disc, the feed motor The optical disc is characterized in that the support base (30) is inverted by the movement through the arcuate guide portion of the guide mechanism (5) and then linearly moved or moved to the moving end on the inner peripheral side of the disc along the guide portion. apparatus.