JPS63288477A - Optical disk device - Google Patents

Abstract

PURPOSE:To narrow the width of the whole of a device by arranging a pair of straight movement guide parts, along which a pickup is guided on a disk radial line, in parallel with the disk insertion direction and arranging an arcuate guide part in the deep side in the disk insertion direction. CONSTITUTION:When a supporting base 30 is horizontally moved along straight movement guide parts A and B arranged in parallel with the disk insertion direction, a pickup 31 is moved back and forth on the signal face of a disk in the disk insertion direction to reproduce or record a signal on the signal face. In case of switching to recording or reproducing operation of the other face, the supporting base 30 on which the pickup 31 is mounted is carried on a guide mechanism 5 in one direction and is inverted through an arcuate guide part C and is moved to a position facing the signal face. That is, the width of the device is not increased by the presence of the guide part C because the arcuate guide part C is arranged in the deeper side of the device in comparison with straight movement guide parts A and B. Thus, the width of the device is narrowed as much as possible with the diameter of the optical disk as the limit.

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.

On the other hand, a device has been proposed that can reproduce signals continuously from both signal sides without turning the disc over (Japanese Patent Laid-Open No. 57-189938 ([;1187/12)]. This device is shown in Fig. 34. As shown, a crank arm (161) is installed on a transfer device (164) equipped with a rotation mechanism (162) and a feed mechanism (163). In addition, a pickup (160) for signal reproduction is provided at the tip of the arm.

In this device, the optical disk (10) is rotated at high speed by a spindle motor (21), and the feed ti
The pickup (160) is moved in the radial direction of the disk by the operation of the ll (163) to reproduce the signal side of the disk, and after the reproduction of one side of the disk is completed, the pickup (160) is moved in the radial direction of the disk.
11 (162) drives the crank arm (181).
The pickup (16
0) toward the other side 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. For example, a 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 video signal recording to be played back is detected.

(problems 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 conventional device described above, Equipment (164
) are two drive mechanisms with different operations, namely the rotation mechanism (1
62) 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) A first object of the present invention is to reproduce signals from both sides of a disk by moving a pickup along a radius line of the disk in an optical disk device capable of recording signals on both sides of the disk. 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.
To provide a configuration of a pickup transfer device that can make the width of the entire device as narrow as possible in an optical disk device configured to achieve the object of the present invention, thereby making it possible to install the optical disk device even in a narrow place. be.

The optical disc device according to the present invention has an opening (12) in the front panel (11) of the device for inserting the optical disc into the device, and a spindle motor (12) for rotating the optical disc located deep inside the opening. 21) was deployed.

A pickup (31) for reproducing signals from or recording signals on an optical disc is mounted on a support base (30).

Further inside the spindle motor (21), a guide mechanism (5) for guiding the movement of the support base (30) is disposed at a predetermined position on the chassis to which the spindle motor (21) is attached; The support base (30) is connected to the conveying means and is moved on the guide mechanism (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 the compatible line movement guide part. and an arcuate guide section that connects the ends of the disc to each other, the compatible line movement guide section is arranged parallel to the disk insertion direction, and the arcuate guide section is arranged on the back side in the disk insertion direction. (Function) The optical disc (10) is mounted on the spindle motor (21) in the device through the opening (12) of the front panel (11), and in this state, the rear half of the disc (10) is It is accommodated in the internal space of the letter-shaped guide mechanism (5).

The support base (30) reciprocates along each guide portion of the guide mechanism (5) by the operation of the conveying means. Support base (
30) moves horizontally along the linear movement guide section, the pickup (31) reciprocates on the disk signal surface in the disk insertion direction, and regenerates the signal surface for recording.Signal reproduction on one side of the disk After recording is completed, the pickup (31) is used when moving to playback and recording operations on the other side.
The support base (30) carrying the signal is transported in one direction on the guide mechanism (5), reversed through the arcuate guide portion, and moved to a position facing the signal plane.

(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); Since rotational movement in the circumferential direction of the disk is not performed unlike in other devices, the structure of the guide mechanism (5) is simple. Further, it is easy to accurately arrange the guide mechanism (5) at a predetermined position on the chassis to which the disk drive motor is attached.
This allows the movement path of the support base (30) to precisely align with the disk radius line. However, the pickup (31) is directly fixed to the support base (30). As a result, the pickup (31) is
The disk will move accurately on the radius line while maintaining a predetermined height.

Further, the guide mechanism (5) is installed in the device with the arc-shaped guide part protruding from the disk storage space, but the arc-shaped guide part is arranged toward the back side of the device with respect to the linear movement guide part. Therefore, the width of the apparatus does not increase due to the presence of the arc-shaped guide part, and the linear movement guide part can be arranged to overlap the disk storage space.

Therefore, in the optical disc device according to the present invention, the width of the device can be made as narrow as possible within the limits of the diameter of the optical disc.

(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> is located approximately in the center of the sub-chassis (14) shown in FIG.
) is fixed.

As shown in FIG. 1, a disk drive device (2) consisting of a spindle motor (21) and a turntable (22) is attached to the sub-chassis (14). (
2>, a pickup device (3) and a guide mechanism (5) are arranged.

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 the reading beam is swung to jump the track to be reproduced 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 (3) is equipped with a self-propelled mechanism (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 guide rail (51) (52) is connected to a disc 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 disk (10) is guided by the downward linear movement guide section A.
) After playing the back side of the disc (10), it passes through the arcuate guide part C, turns around and moves to the top side of the disc (10), and while being guided by the upper straight guide part B, it is possible to play the disc surface. It is.

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(1) to (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 disk tray (71) enters the space in the center of the guide mechanism (5), and the disk tray (71) enters the space in the center of the guide mechanism (5), and the disk tray (71) moves toward the rotation axis of the disk drive device (2) in the cabinet. Next, the disc tray (71) is lowered by the drive of the chucking mechanism described later, thereby placing the disc (10) in the disc drive bag! (
2) to the disc mounting position on the turntable (22) (Fig. 28(c)). Then, the disc drive device (2) rotates the disc (10) at high speed, and the feed motor (40) ) drives the pickup device (3) to reciprocate and pick up the disk (10).
(Fig. 28(d)).

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

Pick up device! ! The support base (30) of (3) is
As shown in FIG. 10, 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 mechanism (4) is disposed.

As shown in FIGS. 3 and 4, the self-propelled machine 1 (4) is equipped with a left gear mechanism that is installed on the left guide rail (51) side of the main base (33) and driven by a feed motor (40). , right guide rail (52) ([1), and consists of a right gear mechanism that is connected to the left gear mechanism via the connecting shaft (47).The left gear mechanism has the first to fifth gears (4
1) (42) (43) (44) (45) and a left drive gear (46), the rotation of the feed motor (40) is controlled from a first gear (41) fixed to the motor shaft to a second gear. (42) Large gear part (42a), small gear part (42b)
, the canine tooth portion (43a) of the third gear (43), and the small gear portion (
43b), the large gear part (44a) of the fourth gear (44), the small gear part (44b), and the large gear part (45) of the fifth gear (45).
45a), the left drive gear (46
) will be communicated to. 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 (45b)
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) (48) near the main base (
33) Pivots (138) (138) mounted on the top have 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 bottle (34a) is fitted into the recess of the main base (33), and the bottle (34a) is pressed down by a leaf spring (139).

The optical axis of the pickup (31) must be maintained perpendicular to the signal surface of the optical disc, but if the disc itself is deformed, the main The base (33) is provided with a tilt mechanism (103) that slightly rotates the sub-base (34) around the bin (34a) to finely adjust the attitude of the sub-base (34). The tilt mechanism (103) is
A drive gear (134) pivotally supported on the main base (33).
) and a cam body (135) formed integrally with the sub-base (
a cam follower (13) that engages with a spiral cam arm (136) that protrudes from the cam body (135) and is recessed in the cam body (135);
The rotation of the motor (131) is controlled by the drive gear (134).
A gear mechanism (133) such as a worm gear (132)
) and the sub-base (34) for the signal surface of the optical disc.
It is composed of an optical sensor (130) that detects the inclination of the motor (131), and an electric circuit (not shown) that converts the detection signal of 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) is slidably penetrated through the slide groove (
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 device 1 (5), the slide groove (35) is connected to 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 double-sided 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 A pickup device (3) straddles part of the moving guide parts A and H.
U-shaped left guide groove into which the left roller (140) fits (
55) is formed.

On the other hand, the right guide rail (52) has a self-propelled mechanism (
A right guide groove (56) into which the right roller (141) and leading roller (104) of 4) are fitted is formed, and also extends over the entire length of the arcuate guide portion C and part of the double-sided linear movement guide portions A and H. and the right drive gear (49) of the pickup device (3).
A right rack part (54) is formed that makes a sound.

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, the pickup (31) moves accurately without coming off the radial line of the disk (10), as shown in FIG.

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 pulled out from the lower guide pole (61), At the same time that the left roller (140) is fitted into the left guide arm (55), the right drive gear <49> is fitted 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 pole, but the redrive gear (46) (49)
drives the respective rack parts (53) and (54), so that a reliable lifting operation is performed.

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 left guide dipping portion (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 section (56), and the slide groove (35) slides on the upper guide ball (6). While moving, 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 (1) 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 downstream 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 the rack part (54) Both ends are formed as protrusions (57) (58) protruding from the guide rail main body in which the guide groove (56) is formed, and the tips of the protrusions (57) (58) are provided with hook parts ( 57a) and (58a) are provided.Furthermore, cutouts (57b) and (58b) are provided on the outer circumferential side of the rack portion at the proximal end of the protruding piece 5) (58). Therefore, the projecting pieces (57) and (58) can be elastically deformed in the opening direction.

Furthermore, positioning bins (59a) are provided on the upper and lower end surfaces of the linear movement guide parts A and B of the right guide rail (52).
(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 (58m) (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) (1
20b) and fixed to each chassis (14) and (17) with screws (122). Also, a protrusion (5
7) By elastically deforming (58) in the opening direction, the hook parts (57a) and (58b) fit 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) Since the depth of engagement of the tooth surfaces is initially shallow and gradually deepens, the shock at the beginning of the amount of engagement 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 in 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 described above, the top chassis (17) is fixed on the left guide rail (51) and right guide rail (52) fixed on the sub-chassis (14), and the end of the top chassis (17) is , is fitted into a bin (125) integrally molded at a predetermined position of the support frame (18) to position it relative to the main chassis (13), and a screw (
123) (123) is fixed to the support frame (18).

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 subchassis 14) by a motor mounting frame (66) that defines the position, and a ball support for supporting the base end of the lower guide ball (61). The base (65) is formed by integral molding of synthetic resin. As shown in FIG. 18, the lower guide ball (61) has its base end fitted into the ball support stand (65), and its distal end screwed into the subchassis (14) with a spacer (62) in between. (67) is fixed onto the subchassis (14). Further, the upper guide ball (6) is fixed to the top chassis (17) with screws, with spacers (63, 64) interposed between both ends of the ball and the top chassis (17). As a result, the upper guide ball (6) and the lower guide ball (61) are placed in each chassis (17) in an accurate posture parallel to the disk radius line.
(14) It will be supported at a predetermined height above.

Next, the loading mechanism (
7) and the chucking mechanism (8) will be described.

The loading mechanism (7) horizontally transports the disk (lO) together with the disk tray (71) to the disk 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, the guide rollers (74a) are provided on both sides of the disc tray (71) as shown in FIGS. 21 and 22.
Guide grooves (171) and (172) into which the guide grooves (74b) fit are provided. 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, the back surface of the disc tray (71) has an iso groove with which the loading gear (79) is engaged.
is formed along the moving direction of the disk tray (71). Therefore, the disk tray (71) is moved out and out of the opening (12) of the front panel (11) by driving the loading motor (70).

The tray holder (73) has a disc tray (71).
A tray-out SW (93) and a tray-in SW (94) are provided for detecting these states, respectively, when the disc moves to the re-movement end in the ejection/removal direction, that is, the disc ejection position and the disc storage position. . On the other hand, as shown in FIG. 21, the disk tray (71) has bins (177) and (178) protruding downward at both ends in the protruding and retracting direction for operating the SWs (93 and 94), respectively. There is.

The chucking mechanism (8) moves up and down the tray holder (3) holding the disc tray (71),
The disc on the disc tray (71) is reciprocated between two positions: a disc storage position and a disc mounting position, and at the disc mounting position, a disc holding plate (81), which will be described later, holds the disc (10) in the disc drive device (
2) is clamped onto the turntable (22).

As shown in Figures 19 and 20, the tray holder (7
A pair of slide shafts (78a) and (7
8b) to protrude 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.

Loading plates (72) are disposed 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> has a pair of slide pins (185a) (185b) protruding toward the side frames (15) (16). On the other hand, the side frame (15) (1
6) has the slide bin (185g) (185b) near the top of the vertical guide hole (182m) (182b).
) are slidably fitted into a pair of horizontal guide holes (181a).
(181b) have been established respectively. This allows each loading plate (72) to connect to the side frame (15).
(16) is supported so as to be able to reciprocate in the horizontal direction.

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.
183m) (184b) are opened, and the tips of the slide shafts (78a) (78b) pass through each cam groove. Furthermore, in the center of the loading plate (72), there is a pivot (
A long hole (184) through which the hole (111) passes is opened in the horizontal direction.

In order to reciprocate the pair of loading plates (72), both side frames (15) (
A pair of chucking gears (88) (88) are pivotally supported at the lower end of the main chassis (13), and a pair of chucking gears (88) are rotatably connected to each other. ) 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 plate (72).

Therefore, by driving the loading motor (70), the double-ended loading plate (72) is moved as shown in FIG.
) As shown in (b), they move back and forth in the horizontal direction at the same time. Furthermore, the left side frame (15) is equipped with a tray that detects both moving ends of the loading plate (72).
Up SW (95) and Tray Down 5W (96
), and a pair of protrusions (186) and (187) for operating these SW (95) and (96) are also provided on the tray holder (73).

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.

Moreover, the tray holder (73) has a slide shaft (78a).
(78b) is in sliding contact with the high cam part of each cam groove (183a) (183b), and the vertical guide groove (182m>
(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), the loading plate (72
) to the back of the device. In this process, the slide shafts (78a) (78b) cam grooves (183a) (1
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).
3a) While slidingly contacting the lower cam part of (183b),
It comes into sliding contact with the lower ends of the vertical guide grooves (182a) and (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 tray (71)
is held at a position further below the disk (10).

In order to hold the disc (10) on the turntable (22), as shown in Figs. 19 and 20, a clamp member (82) constituting the chucking machine (8) is attached to the tray holder (73). be equipped.

The clamp member (82) has a bearing (87) in the center.
It is provided with a disk presser ff1 (81) which is pivotally supported by a disk presser ff1 (81), and a pair of arms (83) (83) on both sides. The base end of each arm (83) is recessed with a U-shaped groove (85) into which the support shaft (76) protruding outward from the tray holder (73) is fitted, and the arm tip is provided with a U-shaped groove (85).
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 rotated downward about the support shaft (76) by a spring (86) stretched between both arms (83) and the tray holder (73). f dimension, and the cam surface (84) protrudes from the loading plate (72).
185b).

Therefore, as shown in FIG. 26(a), when 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, Figure 26 (b
), when the loading play (72) 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 bottle (185b) moves.
) is held in a nearly 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 the opening (12). The 'R (110) is driven by a door opening/closing mechanism (101) to be described later, so that the disc tray (71) is opened at the opening (12).
) when the disc is being ejected from the disc tray (7).
1) is housed in the cabinet (1) and then closed.

The door opening mechanism (101) is as shown in FIG. 24(,)(b).

A door (110) pivotally supported on the front panel (11) is driven by a lever (112) that swings in conjunction with the chucking mechanism (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 (tiz).
the groove (114). Therefore, Fig. 24 (,
) As shown in (b), the door (1
10) are opened and closed.

As shown in FIG. 21, the disc tray (71) has an opening (107) through which the turntable (22) of the disc drive unit Tl (2>) exits.The surface of the disc tray (71) has a large disk mounting part (175) with a diameter of 30 cm and a small disc mounting part (175) with a diameter of 20 cm.
76), and the large disc mounting portion (175) has a window (175) for pushing up when taking out the disc.
70) 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), as shown in FIG. 21, the upper edge (12a) has an upwardly bulging arcuate shape, which facilitates the loading and unloading of disks onto and from 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 configured by a microcomputer.
1). System controller (
The input board 91) includes a key manual device (92) equipped with various operation keys such as a power key and a PLAY key, the tray-out SW (93), and the tray-in SW (
94), tray up SW (95), tray down SW (96), up-doin SW (97)
, and downlink SW (98) are connected. Further, the output port of the system controller (91) includes a CRT to be connected to a video disc playback device, and a display device 17 disposed on the front panel.
(To 90>, each display control circuit (99
) (109), the loading motor (70), the chucking motor (80), the spindle motor (21)
, and a motor control circuit (190) (191) (192) that sends drive signals to the feed motor (40), respectively.
) (193) is connected. Spindle motor (
The rotation of 21) is detected by a rotation detection circuit (194) consisting of a photocoupler etc. installed on the turntable (22).
The detection signal is detected by the system controller (
Connect to the input port of 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 bag T1
When the power key located at (92) is turned on, the stop operation shown in FIG. 31 is executed.

First, the system controller (91)
Determine whether W (98) is ON or not (213) L, OF
In the case of F, 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 circumference of the signal surface below the disk (10) and the lower lead-in SW (98) is turned on, the feed motor is turned off.
Set it to FF (214), then turn the spindle motor (2
1) confirms that it 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 tray out 5W (93) is turned on.
The loading motor (70) is driven until the disc tray (71) is ejected from the cabinet (1) as shown in FIG.

After placing the disc (10) on the disc tray (204), turn on the PLAY key (204).
The loading motor (70) is driven (205) until the input SW (94) is turned on, and then the
As shown in the figure, insert the disc tray (71) into the cabinet (1).
).

When the tray-in SW (94) is turned on (206
), the system controller (91) is a motor control circuit (
191), and then operate the tray down SW (96
) is turned on (207).
) L, as shown in Figure 28(c), insert the disc tray (7).
1) Lower it. As a result, the disk (10) is loaded into the disk drive device (2).

Tray, when down SW (98) is turned on (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 the rotation speed has reached 00rp- (209), and the f& (210) detects the lead-in recording section provided on the inner circumference of the disk, and operates the jump control circuit (211). , reads out the lead-in code that has been inserted into 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 on one side of the disk (10) is completed, the spindle motor (21) switches to reverse rotation, and the feed motor (40> switches to high speed rotation, so that the pickup device (3) 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 circumference 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 (71
) to rise. This causes the disk (10) to separate from the disk drive device (2).

When the tray up SW (95) is turned on (22
0), the system controller (91) drives the loading motor (224) until the tray out SW (93) is turned ON, and moves the disk tray (71) into the cabinet (224) as shown in FIG. 28 (cl). 1) Discharge from. When tray out SW (93) is turned on (220), loading motor (70) and chucking motor (80) are turned off (222) (2
23), as a result, the disk (10) can be taken out.

(3) Reverse playback operation (Fig. 33) For example, when a key instructing playback of the top side of the disc is operated during playback of the bottom side of the disc, first, the display v control circuit (99
) (109), interrupts the CRT image display, and displays "J turn" on the CRT screen and the screen of the display device (90). In addition, after rotating the spindle motor (21) in the reverse direction, the upstream-doiff SW (
By rotating the feed motor (40) at high speed until the switch 97) 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 (22)
), after confirming that the spindle motor (21) has reached 1800 rpm (229), and detecting the one-doin recording section provided at the inner circumference of the disk (230), activate the jump control circuit (231). After reading the lead-in code quickly and escaping from the lead-in recording section (
232), determine whether or not normal playback mode is to be set (233) L, in the case of normal playback mode,
A display indicating the normal playback mode is displayed on the CRT, the screen mute operation is turned off, and the mode is shifted to the 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,
Shift to 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 DESCRIPTION OF THE 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 disc playback device, and Fig. 3 is a main part of the pickup transfer device. 4 is a left side view of the self-propelled mechanism, FIG. 5 is a plan view showing the positional relationship of the pickup device and the guide mechanism with respect to the optical disk, FIG. 6 is a front view of the pickup transfer device, and FIG. 7 8 is a side view showing each guide part of the guide mechanism, FIG. 8 is a perspective view showing the main parts of the pickup device and the guide mechanism,
Figure 9 is a perspective view of the device in Figure 8 viewed from a different direction, Figure 10 is a perspective view of the pickup device, Figure 11 is a sectional view of the pivot, and Figure 12 is a slope view of the big up device from the back side. 13 is a side view showing the arrangement position of a pair of lead-in switches, FIG. 14 is an exploded perspective view of the right guide rail, and FIG. 15 is a sectional view showing the assembly structure of the right guide rail to the chassis. Figure 16 is a perspective view of the main chassis and subchassis, Figure 17 is a perspective view of the subchassis,
Figure 8 is a partially cutaway side view showing the guide ball mounting structure.
Fig. 19 is a plan view showing the chucking mechanism, Fig. 20 is an exploded perspective view of the main chassis, tray holder, and clamp member, Fig. 21 is an oblique view of the disk tray removed from the cabinet, and Fig. 22 shows the loading mechanism. 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 parts of the door opening/closing mechanism; Fig. 26 is a diagram showing the operation of the chucking mechanism, as seen from the inside of the main chassis, Fig. 27 is a partially cutaway side view showing the disc chucking state, and Fig. 28 is a diagram showing the disc loading state. FIG. 29 is a block diagram showing the electric circuit; FIGS. 30 to 33 are flowcharts showing the operation of the electric circuit; FIG. 34 is a conventional pickup transfer device. FIG. (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 tatN (80)...Chucking motor (81)...Disc holding plate $7 Figure 19/l Figure 22 YEI Otori ■ 1. Incident Indication of patent application No. 12443828 Title of the invention Optical disk device 3 Person making the amendment Applicant (188) Sanyo Electric Co., Ltd. 4, Agent 4-10-1 Nakamiya, Asahi-ku, Osaka 535
No. 2 (1) In the drawings, "Fig. 1", "Fig. 6", "Fig. 8", "Fig. 10", "Fig. 16", and "Fig. Figure 6j, r Figure 8j, r Figure 10, 1, r Figure 16, 1, corrected to Figure 26, 1. (2) Specification, page 19, line 11, ``At the same time as fitting'' Correct it to 1 at the same time as r is fitted. (3) Specification page 19, line 13 [Rollers (140) (141) (142) J are corrected to r rollers (140) (141) (104) J. (4) Page 28, line 3 of the specification: “Cam groove (183m) (184b)”
183a) (183b) Amended to J. (5) Specification page 28, line 19 [Loading motor (70) J is corrected to r chucking motor (80) J. (6) On page 33, line 20 of the specification, ``For pushing up when taking out a disk'' was corrected to 1 for hooking your finger on the edge of the disk when taking out a small diameter disk. (7) On page 41, line 12 of the specification, "set" is corrected to 1, which is set at t. that's all

Claims (1)

[Claims] (1) In an optical disk device equipped with a pickup (31) for reproducing signals from both sides of an optical disk or recording signals on both sides of an optical disk, the front panel (1) of the device is
1) has an opening (
12), and a spindle motor (21) for rotationally driving the optical disk is provided in the inner part of the opening (12), the pickup (31) is mounted on the support base (30), and the spindle motor (21) A guide mechanism (5) for guiding the movement of the support base (30) is disposed at a predetermined position on the chassis to which the spindle motor (21) is attached, further inside the support base (30). are connected to a conveying means and moved on a guide mechanism (5), which guide mechanisms (5) are arranged parallel to each other across the disk rotation surface and guide the pickup (31) along the disk radius line. It is composed of a pair of linear movement guide parts and an arcuate guide part that connects the disk outer peripheral side ends of both linear movement guide parts to each other, and both linear movement guide parts are arranged parallel to the disk insertion direction and circular. An optical disc device characterized in that the arcuate guide portion is disposed on the back side in the disc insertion direction.