JPS63288479A - Optical disk device - Google Patents

Abstract

PURPOSE:To prevent a pickup from obstructing the way by transporting a supporting base to a lower straight movement guide part of a guide mechanism at the time of operating a chucking mechanism. CONSTITUTION:In case that the chucking mechanism is operated to set a disk to a spindle motor 21, a position detector of a supporting base carrying means detects whether a supporting base 30 exists in a lower straight movement guide part A of a guide mechanism 5 or not, and a motor control circuit drives a feed motor 40 to transport the supporting base to the lower straight movement guide part A if it does not exist there. Consequently, the pickup 31 and the supporting base 30 are arranged under the disk rotating face, and the disk is moved upward and downward in the internal space of the guide mechanism 5 in this state. Thus, the pickup 31 is kept out of the way in case of movement of the disk.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an optical disc device for reproducing signals from signal surfaces formed on both sides of an optical disc or recording signals on both sides of the disc, and particularly for signal recording. Alternatively, the present invention relates to a device for transporting a reproduction pickup in the radial direction of a disk.

(Prior art) In a general optical video disc playback device,
When reproducing signals recorded on both sides of an optical disc, it is necessary to remove the disc from the device once signal reproduction on one side is complete, turn the disc over, and load it into the device again to reproduce the signal on the other side. . Therefore, there is a problem that the operation is extremely complicated.

In response to this, a device has been proposed that can reproduce signals continuously from both signal sides without turning the disc over (Japanese Patent Application Laid-open No. 57-169936 (G11B7/12)). This device is as shown in FIG. A transfer device (164) equipped with a rotation mechanism (162) and a feed mechanism (163) is equipped with a crank arm (161), and a pickup (160) for signal reproduction is provided at the tip of the arm.

In this device, an optical disc (10) is rotated at high speed by a spindle motor (21), and a pickup (160) is moved in the radial direction of the disc by the operation of a feed mechanism (163) to reproduce the disc signal surface. After the playback of one side of the disc is completed, the rotation mechanism (16
2) rotates the crank arm (161) 180 degrees, thereby inverting the pickup (160) toward the other surface of the disk.

Therefore, both sides of the disc can be continuously reproduced using a single pickup.

Furthermore, it has become standard for optical discs for video disc devices to have recording sections for various code signals, such as lead-in codes and lead-out codes, for controlling the playback operations of the device, at predetermined positions on the disc signal surface. 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 sides, and by reading the code with a pickup,
The starting point of the recording section of the video signal to be played back is detected.

(Problem to be solved) In order to perform faithful signal reproduction in an optical disk device,
It is necessary to perform the tracking operation of the pickup with high precision, and for this reason, the pickup must move accurately on the radius line of the optical disk while maintaining a predetermined height. However, in the above conventional device, the transfer device (164
) has two drive mechanisms with different operations, namely the rotation mechanism (16
2) and the feed mechanism (163), and the pickup is supported so that it can not only reciprocate but also move and rotate.As the degree of freedom of movement of the pickup increases, the positioning accuracy of the pickup increases. However, it was extremely difficult to accurately position the pickup on the disk radius line by reversing the crank arm.

(Means for Solving the Problems) The first object of the present invention is to regenerate signals from both sides of a disc by moving a pickup along the radius line of the disc in an optical disc device capable of recording signals on both sides of the disc. It is an object of the present invention to provide a transfer device with a simple configuration that can transfer with high precision.

Moreover, the second object to be solved by the present invention at the same time is the above-mentioned first object.
A transfer device configured to achieve the purpose of
10) is lowered from above the spindle motor (21) and attached to the motor. In an optical disk device equipped with a chucking mechanism (8), the pickup may get in the way when operating the chucking mechanism (8). The object of the present invention is to provide a configuration of a pick-up transfer device that is not required.

The optical disc device according to the present invention includes a pickup (
31) is mounted on the support base (30), and at a predetermined position of the chassis to which the optical disk drive motor is attached,
a guide mechanism (5) that guides movement of the support base (30);
), and the support base (30) is connected to the conveying means and moved on the guide structure (5).

The guide mechanism (5) includes a pair of linear movement guide parts that are arranged parallel to each other across the disk rotating surface and guide the pickup (31) along the disk radius line, and a pair of linear movement guide parts on the disk outer circumferential side of both linear movement guide parts. and an arcuate guide section that connects the ends of the guide section with each other.

Further, the means for transporting the support base (30) is the support base (30).
0) along the guide mechanism (5), and the support base (30) is the guide mechanism (5).
A position detector detects whether or not the feed motor (40
), and when operating the chucking mechanism (8), the support base (30) is used as a guide machine! <5) to move to the downward linear movement guide section.

(Function) Operate the chucking machine t11 (8) to remove the disc (
10) to the spindle motor (21), first, the position detector of the support base conveying means is connected to the support base (3).
0) is present in the downward linear movement guide of the guide mechanism (5), and if not, the motor control circuit drives the feed motor (40) to move the support base (30)
is moved to the downward linear movement guide section. As a result, the pickup (31) and the support base (30) are positioned below the disk rotation surface, and in this state,
The disk (10) can move up and down in the internal space of the guide mechanism (5). Then, the chucking mechanism (
8), the disk (10) is connected to the spindle motor (21
) is attached to the motor shaft.

Therefore, the pickup (31) and the pickup transfer device do not get in the way when moving the disk (10).

After the installation of the disc (10) is completed, the support base (3
0) moves back and forth along each guide section of the guide mechanism (5) by the operation of the transport means. Signal regeneration on one side of the disk is performed after recording is completed and when transitioning to playback and recording operations on the other side. , a support base (30) equipped with a pickup (31)
) is conveyed in one direction on the guide mechanism (5), reverses through the arcuate guide section, and moves to a position facing the signal plane. Therefore, it is possible to continuously record or reproduce signals on both sides of the disc.

(Effects of the Invention) In the pickup transfer device according to the present invention, the support base (30) on which the pickup (31) is mounted only reciprocates in one direction along the guide mechanism (5); The structure of the guide mechanism (5) is simple because it does not rotate in the circumferential direction of the disk like a device.
5) can be easily placed accurately at a predetermined position on the chassis to which the disk drive motor is attached, and thereby the movement path of the support base (30) can be precisely aligned with the disk radius line. It is. However, the pickup (31) is directly fixed to the support base (30).

As a result, the pickup (31) accurately moves on the disk radius line while maintaining a predetermined height.

As mentioned above, when operating the chucking mechanism, the pickup does not interfere with the movement of the disk.

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

First, an overview of the video disc playback device will be described.

As shown in FIG. 2, a rotary drive device (2) for an optical disk (10) is disposed inside a cabinet (1) formed in the shape of a flat rectangular parallelepiped. 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 for these devices) are formed. 9) is equipped. Further, the disc tray (71) on which the optical disc (10) is to be placed is arranged so as to be retractable from the opening (12) provided in the front panel (11), and has a disc ejection position where the disc can be placed and taken out. and a disk storage position above the disk drive device (2) by a loading mechanism, which will be described later.

A main chassis (13) shown in Fig. 16 is disposed inside the cabinet (1).
3), there is a sub-chassis (14) shown in FIG.
) is fixed.

A disk drive device (2) consisting of a spindle motor (21) and a turntable (22) is attached to the sub-chassis (14) as shown in FIG.
A pickup device (3) and a guide mechanism (5) are disposed opposite to the device (2).

The pickup device (3) includes a pickup (31) that includes an optical system including a semiconductor laser and an objective lens, etc., mounted substantially in the center of a support base (30).

As is well known, in a video disc playback device, a pickup <
By jumping the optical axis of 31) to the inner or outer circumference of the disc, special playback such as still image playback or double speed playback is performed. This jumping operation can be achieved using various well-known means, such as an electromagnetic drive method in which a permanent magnet is disposed in a movable part including an objective lens and the magnet is driven by a drive coil. When swinging the signal reading beam to make the tracks to be played jump by a predetermined number of tracks,
A control signal having a magnitude corresponding to the width of the predetermined number of tracks is sent to a jump control circuit connected to the drive coil.

The pickup device F (3) is equipped with a self-propelled machine 1 (4) consisting of a gear mechanism disposed on both sides of a support base (30) and a feed motor (40) that drives the gear mechanism. .

The guide mechanism (5) includes left and right guide rails (51, 52) formed in a U-shape, respectively.The two guide rails (51, 52) are shown in FIGS. 2 and 5. so that the guide rails are parallel to each other, and each guide rail is parallel to the disk semi-meridian extending in the disk tray movement direction.
It is fixed onto the sub-chassis (14).

Each kite rail (51) (52) is connected to a disk (1) set on a turntable (22) as shown in FIG.
0) from a lower linear movement guide part A that extends horizontally below, an upper linear movement guide part B that extends horizontally above the disk (10), and an arcuate guide part C that connects both guide parts A and B. configured. Therefore, the pickup device (3) plays the back side of the disc (10) while being guided by the downward linear movement guide part A, and then reverses by passing through the arcuate guide part C and moves to the upper surface of the disc (10). The disc surface can be played back while being guided by the upper linear guide section B.

In addition, in order to fix the upper linear guide part B in a predetermined position, the first
As shown in Figure 6, a top chassis (17) is fixed on both guide rails (51) and (52), and the end of the top chassis (17) is attached to a support provided on the main chassis (13). Fix it to the frame (18).

In order to more accurately guide the linear movement of the pickup device (3), the guide rail is moved linearly onto the top chassis (17) and sub-chassis (14) as shown in Figures 1, 6 and 18. An upper guide ball (6) and a lower guide ball (61) are supported in parallel with the guide portion, respectively. On the other hand, the support base (30) of the pickup device (3)
As shown in FIG. 12, a slide groove (35) with an arcuate cross section through which the guide ball can pass is provided. When the pickup device (3) reproduces a signal, the slide groove (35) slides on the circumferential surface of the guide balls (6) (61), thereby preventing wobbling during linear movement.
Tracking accuracy can be improved.

Load the optical disc into the video disc playback device,
The operation during signal reproduction will be explained based on FIGS. 28(a) to 28(d).

After placing the disk (10) on the disk tray (71) ejected from the cabinet (1) as shown in FIG. 28(a), the disk tray (71) is moved into the cabinet by driving the loading mechanism described later As a result, the disc tray (71) enters the space in the center of the guide machine 111 (5), and the disc (10)
moves to the disk storage position on the rotating shaft of the disk drive device (2) in the cabinet. Next, the disc tray (71) is lowered by driving the chucking mechanism described later, thereby setting the disc (10) to the disc mounting position on the turntable (22) of the disc drive device (2) (28th Figure (C)). Thereafter, the disk drive device (2) rotates the disk (10) at high speed, and the feed motor (40) drives the pickup device (3) to reciprocate.
0) (FIG. 28(d)).

Next, the configuration of each part of the video disc playback device will be described in detail.

The support base (30) of the pickup device (3)
As shown in Figure 0, it is constructed by disposing a sub-base (34) on which a pickup (31) is mounted on a main base (33) on which a self-propelled machine t* (4) is disposed.

As shown in FIGS. 3 and 4, the self-propelled mechanism (4) includes a left gear mechanism provided on the left guide rail (51) side of the main base (33) and driven by a feed motor (40); It is arranged on the right guide rail (52) side and consists of a left gear (return structure) and a right gear mechanism connected via a connecting shaft (47).The left gear mechanism has first to fifth gears (41).
(42) (43) (44) (45) and a left drive gear (46), the rotation of the feed motor 40) is
From the first gear (41) fixed to the motor shaft, the second gear (42) has a large gear part (42a), a small gear part (42b),
The large gear part (43a) and the small gear part (4
3b), the large gear part (44a) of the fourth gear (44), the small gear part (44b), and the large gear part (4) of the fifth gear (45).
5a), left drive gear (46) via small gear part (45b)
/\Reportedly. Further, the right gear mechanism has the fifth gear (4
5) and the sixth gear (
48) and a right drive gear (49) that meshes with the gear. The small gear part (45b) of the fifth gear and the sixth gear 4
8), and the left drive gear (46) and right drive gear (49) are each designed to the same specifications. In addition, the left drive gear (4
6) and the right drive gear (49), as shown in FIG. ing.

As shown in FIG. 3, a left roller (140) and a right roller (141) are rotatably attached to the rotation shafts of the left drive gear (46) and right drive gear (49), respectively.

Furthermore, the right guide rail (52) of the main base (33)
A leading roller (104) is pivotally supported in front of the side wall at the same height as the right roller (141).

As shown in Figure 10, the sub-base (34) connects the right and left drive gears (49) (46) to the main base (
33) The pivot portion (138) pivoted on the sub-base (34) has pins (34a) (34a) protruding from both sides of the sub-base (34) parallel to the rotation axis of the drive gear. As shown in FIG. 11, the pin (34m) is fitted into the recess of the main base (33), and the pin (34m) is pressed down by the leaf spring (139).

The optical axis of the pickup (31) must be maintained perpendicular to the signal surface of the optical disc, but in order to correct the direction of the optical axis of the pickup (31) when the disc itself is deformed. A tilt mechanism (103) is provided on the main base (33) to slightly rotate the sub-base (34) around the pin (34m) to finely adjust the attitude of the sub-base (34). The tilt mechanism (103) includes a drive gear (13) pivotally supported on the main base (33).
4), and a cam follower (135) that engages with a spiral cam groove (136) that protrudes from the sub-base (34) and is recessed in the cam body (135).
7), and the rotation of the motor (131) is controlled by the drive gear (13).
Gear mechanism (1) such as a worm gear (132) that transmits to
33) and the sub-base (3
4), and an electric circuit (not shown) that converts a detection signal from the sensor into a drive control signal for the motor (131).

Further, on the back side of the pickup device (3), as shown in FIG. 12, the upper guide ball (6) and the lower guide ball (
61) has an arc-shaped cross section through which it can slide (
35) is long and recessed in the direction of movement of the pickup device (3). Therefore, when the pickup device (3) moves on the linear movement guide section of the guide mechanism (5), the slide clearer (35) moves toward the lower guide ball (61) as shown in FIG.
Alternatively, the pickup (31) is fitted into the upper guide ball (6) and guided in horizontal movement, and the pickup (31) moves at a predetermined height position from the disk (10) without wobbling.

The left guide rail (51) and 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 both drawing line movement guide parts A and B.
A left rack portion (53) with which the left drive gear (46) of the self-propelled mechanism (4) meshes is formed over the entire length of the arcuate guide portion C, and the left rack portion (53) is formed over the entire length of the arcuate guide portion C A pickup device (3) straddles part of the line movement guide parts A and H.
The left roller (140) fits into the U-shaped left guide section (
55) is formed.

On the other hand, on the right guide rail (52), the self-propelled machine 11
1 (4) right roller (141) and leading opening roller (104)
) into which a right guide groove (56) is formed,
The right drive gear (4
A right rack part (54) with which the parts 9) are engaged is formed.

When the pickup device (3) is moved along the downward linear movement guide section for signal reproduction, it is transported by driving the left drive gear (46) with respect to the left rack section (53). At this time, the right roller (141) and the leading roller (104) are guided by the right guide groove (56), and the slide groove (35) slides on the lower guide ball (61). Therefore, the pickup device (3) is connected to the left drive gear (46).
Even when driven by a chisel, it moves back and forth smoothly. Therefore, as shown in FIG. 5, the pickup (31) moves accurately without coming off the radial line of the disk (10).

After the playback of the back side of the disk (10) is completed, when moving to playback of the top side, as shown in FIGS. 8 and 9, the pickup device (3) is removed from the lower guide ball (61), At the same time that the left roller (140) is fitted into the right guide groove (55), the right drive gear (49) is inserted into the right rack part (54).
mesh with. Therefore, in the pickup device (3), the three rollers (140, 141, and 142) are guided by the respective guide grooves (55, 56), and the redrive gears for both the racks (53, 54) (46)
(49), the disk rises toward the upper surface of the disk along the arcuate guide portion C and is reversed, as shown in FIG. In this process, the pickup device (3) is not guided by the guide ball, but the redrive gear (46) (49)
drives the respective rack parts (53) and (54),
Perform a reliable upward movement.

By further conveying the reversed pickup device (3) toward the center of the disk, the slide groove (35) fits into the upper guide ball (6) (Fig. 6), and the left roller (1)
40) and the right drive gear (49) are respectively connected to the right guide groove (5).
5) and the right rack section (54). Therefore, after that, the pickup device (3) is moved so that the right roller (141) and the leading roller (104) are guided by the right guide groove (56), and the slide groove (35) slides on the upper guide ball (6). At the same time, the left rack section (53) is transported by the drive of the left drive gear (46), and signals are reproduced from the upper surface of the disk (10).

In this case as well, the pickup device (3) moves back and forth smoothly under the guidance of the upper guide ball (6), and the pickup (31) does not deviate from the disk radius line.

As shown in FIG. 13, the sub chassis (14) and the top chassis <17> are equipped with a limit switch (hereinafter referred to as SW) that detects when the pickup device (3) reaches the end of movement on the inner circumference side of the disk. A lower lead-in SW (98) and an upper lead-in 5W (97) are provided, respectively. On the other hand, at the bottom of the pickup device (3), as shown in FIG.
7) A protrusion (36) is formed to operate (98).

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 provided with protrusions (57) (58) that protrude from the guide rail body in which the guide groove portion (56) is formed. The projecting pieces (57) and (58) are provided with hook portions (57a) and (58a) at their tips. In addition, notches (57b) and (58b) are formed in the base end portions of the protruding pieces (57) and (58) on the outer peripheral side of the rack portion. Therefore, the projecting pieces (57) and (58) can be elastically deformed in the opening direction.

Furthermore, positioning bins (59a) (
59b) are provided in a protruding manner.

On the other hand, the top chassis (17) and sub chassis (14)
) has hook portions (57) of the projections (57) (58).
a) Locking hole (102a) for locking (58a) (10
2b) and small holes (120a) (120b) into which the positioning pins (59a) (59b) are fitted are opened at predetermined positions, respectively.

The right guide rail (52) connects the positioning bins (59a) (59b) to the small holes (120a) (as shown in Fig. 15).
120b) and fixed to each chassis (14) and (17) with screws (122). Also, the protrusion (
57 and 58 are elastically deformed in the opening direction, and the hook portions (57a) and (58b) are inserted into the locking holes (58b) of each chassis.
102a) Lock to (102b). As a result, both ends of the right rack section (54) are held in a state expanded outward from the pitch circle at the center of the rack.

Therefore, when the pickup device (3) moves from the linear movement guide section of the guide rail to the arcuate guide section,
When the right drive gear (49) starts to mesh with the end of the right rack part (54), the right drive gear (49) and the right rack part (54)
4) The meshing depth of the tooth surfaces is initially shallow and gradually deepens, so 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). On both sides of the main chassis (13) are left side frames (
15) and the right side frame (16) are fixed, and a support frame (18) is constructed approximately at the center of the upper end portions of both side frames (15) and (16). Support frame (1
8) are bins (124) (124) integrally molded at predetermined positions on the upper ends of both side frames (15) (16).
It is fitted into the main chassis (13) to be positioned with respect to the main chassis (13), and is also fixed to both side frames (15) and (16) by screws (123) and (123).

Further, as mentioned above, the l-tube jersey (17) is fixed on the left guide rail (51) and right guide rail <5Z> fixed on the sub-chassis (14), and the end of the top chassis (17) is positioned with respect to the main chassis (13) by fitting into a bottle (125) integrally molded at a predetermined position of the support frame (18), and the support frame (18) is fixed by screws (123) (123).
Fixed.

With the above structure, the left guide rail (51) and the right guide rail (52) are fixed to predetermined positions with respect to the sub-chassis (14) with high rigidity and precision.

As shown in FIG. 17, the spindle motor (21) is mounted on the sub-chassis <14) with a motor mounting frame (66) that defines the position and a motor mounting frame (66) for supporting the base end of the lower guide ball (61). A ball support stand (65) is formed by integral molding of synthetic resin. 18th [2! As shown in
The lower guide ball (61) has its base end attached to the ball support stand (65).
), and the tip end is fixed onto the sub-chassis (14) with a screw (67) with a spacer (62) interposed between the distal end and the sub-chassis (14). In addition, the upper guide ball (6) has both ends of the ball and the top chassis (17).
It is fixed to the top jersey (17) with screws, with spacers (63) and (64) sandwiched between them. As a result,
The upper guide ball (6) and the lower guide ball (61) are
Hold each chassis (
17) It will be supported at a predetermined height above (14).

Next, the loading v1 side (7) and the chucking mechanism (8) will be described based on FIGS. 19 to 27.

Loading t[(7) horizontally transports the disc (10) together with the disc tray (71) to the disc ejection position shown in FIG. 2 and the tray holder (73) described later.
) This allows reciprocating movement between two disc storage positions at the back. As shown in FIGS. 19 and 20, a pair of guide rollers (74a) and (74b) are provided to protrude inward from the inner surfaces of both side plates of the tray holder (73), respectively. On the other hand, on both sides of the disc tray (71) there are 21
As shown in the figure and FIG. 22, the guide roller (74a)
A guide groove (1) 1) (172) into which the guide groove (74b) is fitted is recessed. This allows the disc tray (71)
is guided in reciprocating movement 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) to which the motor is connected. On the other hand, as shown in FIG. 22, a rack <180) with which the loading gear (79) meshes is formed on the back surface of the disc tray (71) along the moving direction of the disc tray (71). Therefore, the disk tray (71) is moved from the front panel () by the loading motor ()0).
11) appears and disappears from the opening (12).

The tray holder (73) has a disc tray (71).
A tray-out SW (93) and a tray-in 5W (94) are provided for detecting these states when the disc moves to both ends of movement in the ejection/removal direction, that is, the disc ejection position and the disc storage position. On the other hand, as shown in No. 2111J, the disc tray (71) has pins (177) and (178) protruding downward at both ends in the protruding and retracting direction for operating the SWs (93) and (94), respectively. .

The chucking mechanism (8) moves up and down a tray holder (73) holding a disc tray (71),
The disc on the disc tray (71) is reciprocated to two positions, a disc storage position and a disc mounting position, and at the disc mounting position, a disc presser f, which will be described later, is moved.
The disk (10) is moved onto the turntable (22) of the disk drive device (2) by f1 (81).

As shown in Figures 19 and 20, the tray holder (7
A pair of slide shafts (78a) and (7
8b) protrudes outward, and each side frame (
15) In (16), the slide shaft <78a) (7
8b) are slidably fitted into the pair of vertical guide holes (182a).
) (182b) respectively. Therefore, the tray holder (73) is supported on the main chassis (13) so as to be movable up and down.

There are loading plates on the outer surfaces of the left and right side frames (15) and (16) as shown in Figures 19 and 23.
(72) are arranged respectively. The loading play
) (72) has a pair of slide bins (185a) (185) facing the side frames (15) and (16).
b) is provided protrudingly. On the other hand, side frame (15)
(16) has vertical guide holes (182a) (182b
) near the upper part of the slide pin (185a) (1
A pair of horizontal guide holes (181
a) (181b) have been established respectively. As a result, each loading plate (72) is connected to the side frame (1).
5) It is supported so that it can reciprocate in the horizontal direction relative to (16).

In addition, the loading plate (72) has cam grooves (as shown in FIG. 23) at both ends in the front-rear direction, each consisting of a high cam part, a low cam part, and an inclined cam part connecting both cam parts.
183a) (184b) are opened, and the tips of the slide shafts (78a) and (78b) pass through each cam groove. Furthermore, in the center of the loading plate (72),
Pivots (11) protruding from the side frames (15) (16)
A long hole (184) through which 1) passes is opened in the horizontal direction.

In order to reciprocate the pair of loading plates (72), as shown in FIG.
A pair of chucking gears (88) (88) are pivotally supported at the lower end of the main chassis (16) and are connected to each other so as to be rotatable together, and a chucking motor ( 80) by both gears (88)
(88) is rotationally driven. 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 play (72).

Therefore, by driving the loading motor (70), the double-ended loading plate (72) is moved as shown in FIG.
)(+)), they move back and forth in the horizontal direction at the same time. Furthermore, the left side frame (15) has a tray up SW (95) and a tray down 5W (9) that detect both moving ends of the loading plate (72).
6), and a pair of protrusions (188) <187) for operating these SW (95) and (96) are also provided on the tray holder (73).

As shown in No. 24 (Z(a)), the disk tray (71)
In the ejected state, the loading plate (72)
is located at the moving end on the front panel (11) side. The tray holder (73) also has a slide shaft (78a).
) (78b) is in sliding contact with the high cam portion of each cam groove (183a) (183b), and the vertical guide groove (182a)
(182b) and is located at the upper moving end.

After storing the disc tray (71) deep into the tray holder (73) by driving the loading motor (70), driving the chucking motor (80);
As shown in Figure 24(b), loading play) (7
2) is moved to the back of the device. During this process, the slide shafts (78a) ()8b) are inserted into the cam grooves (183a) (
By driving the vertical guide groove (182a) (
182b) to the lower end of the movement, and at the end of the movement, the slide shafts (78a) (78b) are aligned with the cam grooves (182b).
3a0183b), and also comes into sliding contact with the lower end portions of the vertical guides 7fA (182a) (182b).

As a result, the disc tray (71) is attached to the tray holder.
(73), and as shown in FIG. 28(c), the disk (10) is set on the turntable (22) of the disk drive device (2), and the disk rake 71)
is held at a position further below the disk (10).

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

The clamp member (82) has a bearing (8) in the center.
It is provided with a disk holding plate (81) which is pivotally supported by a disk, and a pair of arms (83) (83) on both sides. The proximal end of each arm (83) is recessed with a U-shaped socket (85) into which the supporting shaft (76) protruding outward from the tray holder (73) is fitted, and the tip of the arm is A cam surface (84) extending in an arc shape on a vertical plane is formed.

As shown in FIG. 26, the clamp member <82) is tilted downward about the support shaft (76) by a spring (86) stretched between both arms (83) and the tray holder (73). As the cam surface (84) is biased, the slide bin (72) protrudes from the loading brake (72).
185b).

Therefore, as shown in FIG. 26(a), if the loading plate (72) is located at the moving end on the front panel (11) side and the tray holder (73) is located at the rising end, The arm (83) is at the end of rotation in the counterclockwise direction against the spring (86) due to the drive of the pin (185b) against the cam surface (84). From this state, the second
As shown in Figure 6(b), the loading plate (72)
When the tray holder (73) moves to the back of the device and the tray holder (73) descends, the arm (83) rotates clockwise due to the bias of the spring (86) as the bin (issb) moves, and the arm (83) It is held in a substantially horizontal position.

As a result, as shown in FIG. 27, the clamp member (82)
The disc presser (81) installed at the disc (10)
Press down on the center. As a result, the disk (10) is held between the disk holding plate (81) and the turntable (22), and is reliably rotated by the spindle motor (21).

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 equipped with a door opening/closing machine 1ull (101), which will be described later.
), the disc tray (71) moves into the opening (
It opens when the disc tray (71) is being ejected from the cabinet (12), and closes after the disc tray (71) is housed in the cabinet (1).

The door opening/closing mechanism (101) includes a door (110) pivoted on the front panel (11), as shown in FIGS. 24(a) and (b).
is driven by a lever (112) that swings in conjunction with the chucking machine 1 (8).

As shown in FIG. 23, the lever (112) has a pivot hole (115) at its base end, a long hole (113) at its center, and a U-shaped groove (114) at its distal end. The tip of the pivot shaft (111) protruding from the left side frame (15) is fitted into the pivot hole (115) of the lever (112), and the elongated hole (
113), the tip of the slide shaft (78a) protruding from the tray holder (73) is engaged.

On the other hand, as shown in FIG. 25, the door (110) has arms (118) protruding from both ends, and a pivot pin (116) provided at the base end of the arm is supported by the front panel. It is possible to rotate around the support pin within an angular range of approximately 90 degrees. A drive bin (117) is provided protruding from the tip of the arm (118), and the drive bin (117) is connected to the U of the lever <112).
″4 groove (114). Therefore, as shown in Fig. 24 (
As shown in a) and (b), the lever (112) rotates as the tray holder (73) moves up and down, thereby opening and closing the door (110).

As shown in Figure 21, the disc tray (71) has an opening (10) through which the turntable (22) of the disc drive device (2) exits. Disc tray (
71) has a large disk mounting part (with a diameter of 30 cm) on the surface.
175) and a small disk mounting part (17
6), and the large disc mounting part (175) has a window (17) for pushing up when taking out the disc.
0) has been established.

Further, on both sides of the disc tray (71), there are notches (173) (17
4) is provided. Therefore, the disk tray (71
) When removing the disc from the notch (173) (1
74), it is easy to take out the disc because you can put your finger on the edge of the disc.

With the disc tray (71) ejected from the cabinet (1), the large disc mounting section (175) is placed in the opening (
12), and the far end is not completely exposed from the cabinet (
1), but the opening (1) of the front panel (11)
2) has an upwardly curved upper edge (12m) as shown in FIG. 21, which makes it easy to place and take out the disk on the disk tray (71).

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

Operations such as loading and chucking are performed by a system controller (9) configured by a microcomputer.
1). System controller (
The input port of 91) includes a key manual device (92) equipped with various operation keys such as a power key and a PLAY key, the tray-out 5W (93), the tray-in 5W (94),
Tray up sw (95), tray down 5W (9
6), the upper lead-in SW (97), and the lower lead-in SW (98) are connected. Further, the output port of the system controller (91) displays the 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, respectively. display control circuits (99) (109) that generate video signals for
Motor control circuits (190) (191) (192) (193) are connected to send drive signals to the loading motor (70), chucking motor (80), spindle motor (21), and feed motor (40), respectively. has been done. The rotation of the spindle motor (21) is
Detected by a rotation detection circuit (194) consisting of a photo coupler etc. installed on the turntable (22),
The detection signal is connected to the input port of the system controller (91).

Next, an example of the operation of the above electric circuit will be outlined with reference to FIGS. 30 to 33. Furthermore, Fig. 30 shows the playback mode setting operation from power-on to the normal playback mode, Fig. 31 shows the stop operation, Fig. 32 shows the eject operation, and Fig. 33 shows the changing of the playback surface from the bottom of the disc to the top. This represents the actual reverse playback operation.

(1) Playback mode setting operation (Figure 30) Key manual device (
When the power key provided at 92) is turned on, the stop operation shown in FIG. 31 is executed.

First, the system controller (91)
W Determine whether (98) is ON or not (213) L, ○F
If FV), the feed motor is driven (216), the spindle motor is turned off (217), and the process returns to the above judgment (213). When the pickup device (3) moves to the innermost periphery of the signal surface below the disk (10) and the lower lead-in sw (98) is turned on, the feed motor is turned off.
F (214), then spindle motor (21
) has completely stopped (215), shifts to stop mode, and waits for the eject key to be operated.

As shown in Figure 30, when the eject key is turned on (
201), an unloading operation is performed. That is,
The system controller (91) is a motor control circuit (19).
0) and the tray out sw (93) is turned on.
The loading motor (7o) is driven until the disk tray (71) is ejected from the cabinet (1) as shown in FIG. 28(a).

After placing the disc (1o) on the disc tray (71), when the PLAY-1i-1 is turned on (204), the loading motor (70) is driven (204) until the tray-in SW (94) is turned on. 205) Then, as shown in FIG. 28(b), the disc tray (71) is housed in the cabinet 1).

When Tray I'y SW (94) turns on (2
0G), the system controller) roller (91) operates the motor control circuit <191), and the tray down SW
Drive the chucking motor until (9G) turns ON (
207) L, lower the disk tray (71) 3 as shown in FIG. 28(c). As a result, the disk (1o
) is attached to the disk drive (2).

Tray down SW (?6) is ON.7) t(20)
8) The system controller (91) rotates the spindle motor (21) so that the rotational speed of the motor is 18
The rotation detection circuit (194) detects that r! (210), operating the jump control circuit (211) to read the lead-in code written in the lead-in recording section at high speed;
After escaping from the lead-in recording section (212), the mode shifts to normal playback mode.

In the normal playback mode, the motor control circuit (193) and the signal playback circuit (not shown) are operated, and the pickup device (3) is moved by the drive of the feed motor (40) while the signal is output from the rotating disk (10). Play.

When the signal reproduction from one side of the disk (10) is completed, the spindle motor (21) is switched to reverse rotation, and the foot motor (40) is switched to high speed rotation, and the pickup device (3) is rotated as shown in FIG. The downward linear movement guide part A
From there, through the arcuate guide section C, it is quickly moved to the upward linear movement guide section B. The pickup device (3) moves along the upward linear movement guide section B until the upper lead-in SW (97) is turned on, and reaches the innermost peripheral portion of the signal surface of the disk (10).

Thereafter, the motor control circuit (193) and the signal reproduction circuit are operated again, and the pickup device (3) is moved toward the outer circumference of the disk by driving the feed motor (40), and the signal surface of the disk is reproduced.

(2) Stop operation (FIG. 31) and eject operation (FIG. 32) When the 5TOP key is turned on during signal reproduction, the stop operation shown in FIG. 31 is executed as described above.

Further, as shown in FIG. 32, when the eject key is turned on, the stop operation (218) is first executed, and after signal reproduction is stopped, the chucking motor ( 80) is driven (221)
Then, as shown in FIG. 28(b), the disk tray () 1
) to rise. This causes the disk (10) to separate from the disk drive device (2).

Tray up 5W (95) turns on (220)
, the system controller (91) is the tray out 5
The loading motor is driven (224) until W (93) is turned ON, and the disk tray (71) is ejected from the cabinet (1) as shown in FIG. 28(d). When tray out SW (93) is turned on (220
), the loading motor (70) and the chucking motor (80) are turned off (222) (223). As a result, the disc (10) can be taken out.

3) Reverse playback operation (Figure 33) For example, when a key instructing playback of the top side of the disc is operated while the bottom side of the disc is being played back, the display system (wholesale circuit (99)
) (109), interrupts the image display on the CRT, and displays "J turn" on the CRT screen and the screen of the display device (90).Also, rotates the spindle motor (21) in reverse. After that, go uphill 5W (9
By rotating the foot motor (40) at high speed until the switch 7) is turned on, the pickup device (3) is quickly moved toward the inner circumference of the upper surface of the disk.

When the upper lead-in SW (97) is turned on, (227
), confirms that the spindle motor (21) has reached 1800 rpm (229) L, detects the lead-in recording section provided on the inner circumference of the disk (230), activates the jump control circuit (231) , After quickly reading the lead-in code and escaping from the lead-in recording section (232), it is determined whether or not the normal playback mode is to be set (233) L. In the case of the normal playback mode, normal playback is performed on the CRT. A display indicating the mode is displayed, the mute operation on the screen is turned off, and the mode is shifted to normal playback mode. Further, if it is found in the judgment (233) that the program playback mode is set, a display indicating the program playback mode is displayed on the CRT, and the mode is shifted to the program playback mode. In the program reproduction mode, the feed motor (40) is controlled according to a preset program, and signals are reproduced in a predetermined order from a plurality of image recording sections formed on the disk.

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

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a pickup transfer device according to the present invention, FIG. 2 is a perspective view showing the external appearance of a video disc playback device, FIG. 3 is a plan view showing main parts of the pickup transfer device, and FIG. The figure is a left side view of the self-propelled mechanism, Figure 5 is a plan view showing the positional relationship of the pickup device and guide mechanism with respect to the optical disk, Figure 6 is a front view of the pickup transfer device, and Figure 7 is each guide of the guide mechanism. Side view showing parts, No. 8
Figure 9 is a perspective view showing the pickup device and main parts next to the guide fi, Figure 9 (2) is a perspective view of the device in Figure 8 seen from a different direction, Figure 10 is a perspective view of the pickup device, and Figure 11 is the main part of the pickup device. Figure 12 is a sectional view of the branch, Figure 12 is a slope view of the pickup device seen from the back side, Figure 13 is a side view showing the installation position of a pair of lead-in switches, Figure 14 is an exploded slope view of the right guide rail, Figure 14 is an exploded slope view of the right guide rail. Figure 15 is a sectional view showing the assembly structure of the right guide rail to the chassis, Figure 16 is a slope view of the main chassis and subchassis, Figure 17 is a slope view of the subchassis, and Figure 18 is a guide ball mounting structure. FIG. 19 is a partially cutaway side view, FIG. 19 is a plan view showing the chucking mechanism, and FIG.
Figure 0 is an exploded perspective view of the main chassis, tray holder, and clamp member, Figure 21 is a perspective view of the disc tray removed from the cabinet, Figure 22 is a rear view of the disc tray that constitutes the loading mechanism, and Figure 23 is an exploded perspective view of the main chassis, tray holder, and clamp member. FIG. 24 is an exploded perspective view showing the king mechanism, FIG. 24 is a side view showing the operation of the loading plate, FIG. 25 is an exploded perspective view showing the main parts of the door opening mechanism, and FIG. 26 is a view showing the operation of the chucking mechanism. FIG. 27 is a partially cutaway side view showing the disc chucking state, and FIG. 28 is a diagram illustrating a series of operations from disc loading to completion of chucking. Second
Figure 9 is a block diagram showing the electric circuit, Figures 30 to 3
3 is a flowchart showing the operation of the electric circuit, and FIG. 34 is a side view showing the configuration of a conventional pickup transfer device. (10>...Optical disk (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)...Disc presser plate Applicant: Sanyo Electric Co., Ltd. Procedural amendment [voluntary], Incident indication Patent Application No. 62-124436, title of the invention: Optical disk device, person making the amendment: Applicant (188) Sanyo Electric Co., Ltd., agent: 4-10-12 Nakamiya, Asahi-ku, Osaka 535
Figure 1, Figure 16, and Figure 26 are attached to Attachment R 1.
Fig. 1r Fig. 6 1, “Fig. 8 1,” Fig. 10 1, r Fig. 16
Figures j and r 26 Corrected to Figure 1. (2) On page 20 of the specification, line 1, "at the same time as it fits" was amended to "R and at the same time it fits" to J. (3) Specification page 20, line 3 [Roller (140) (141) (142) J is corrected to C roller (140) (141) (104) J. (4) Statement box page 28, line 13 [Cam groove (183m) (184b) Change J to “cam groove (
183m) (183b) Corrected to J. (5) Specification, page 29, line 9, “Loading motor (70) J is corrected to r chucking motor (80) J.” (6) Specification, page 34, line 10 [Push-up operation when taking out the disc Correct ``to do this'' to ``to put your finger on the edge of the disk when taking out a small-diameter disk.'' (7) Page 42, line 2 of the specification, ``It is set'' is set to 1. Corrected to. that's all

Claims (1)

[Claims] (1) The spindle motor that rotates the optical disk (
21) and a chucking mechanism (21) for lowering the optical disk onto the spindle motor (21) and attaching it to the motor shaft.
8) and a pickup (31) for reproducing signals from both sides of the optical disk or recording signals on both sides of the optical disk, the pickup (31) being mounted on the support base (30), Spindle motor (2
A guide mechanism (5) that guides the movement of the support base (30) is disposed at a predetermined position of the chassis to which the support base (30) is connected to a conveying means. ), and the guide mechanisms (5) are arranged parallel to each other across the disk rotating surface, and the guide mechanisms (5)
31) includes a pair of linear movement guide parts that guide the disk along the disk radius line, and an arcuate guide part that connects the ends of the two linear movement guide parts on the disk outer circumferential side to each other, and the support base conveying means , the support base (30) is guided by the guide mechanism (5).
); a position detector for detecting whether or not the support base (30) is present in the downward linear movement guide section of the guide mechanism (5); and a motor control circuit (193) that controls the rotation of the feed motor (40) based on the feed motor (40), and when operating the chucking mechanism (8), the support base (30) guides the downward linear movement of the guide mechanism (5). 1. An optical disc device characterized in that the optical disc device is configured to perform a transition to an optical disk.