JPS6171460A - Disc reproducing device - Google Patents

Abstract

PURPOSE:To use the same drive source for a feed mechanism and a loading mechanism by interlocking the loading mechanism with the feed mechanism and switching the on/off of the delivery of torque of the mechanisms with an engaging/disconnecting mechanism. CONSTITUTION:A feed loading motor 85 is arranged on the side of a guide shaft 80 and the torque of the motor 85 is delivered to a large diameter gear 89 arranged near one side of a head base 82 via a belt 86, a pulley 87 and a small diameter gear 88 fixed coaxially to the said pulley 87. Then the loading mechanism 111 is actuated in interlocking with the feed mechanism 92 and the on/off of the delivery of the torque from the feed mechanism 92 to the loading mechanism 11 is switched by the engaging/disconnecting mechanism 112. Thus, the feed mechanism 92 and the loading mechanism 111 are driven by the single loading motor 85.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disc playback device used for playing back discs such as compact discs and optical video discs.

[Prior art]

To explain the configuration of this type of disc playback device using a compact disc player as an example, a typical compact disc player automatically transports the disc inserted into the device to a fixed position where it can be played, and then moves the pickup head to the fixed position. It is arranged to move in the radial direction with respect to the t-disc to reproduce the disc. Such a device is capable of performing the above operations by transporting a n1t-disc placed in the device to a fixed position where it can be played (played), and transporting a nine-disk placed in the device to a fixed position where it can be played (played); The disk drive includes a loading mechanism for moving the pickup head to the eject position, and a feed mechanism for moving the pickup head in the radial direction with respect to the disk.

Incidentally, in such a conventional disc playback device, the drive sources (motors) and drive systems for the loading mechanism and the feed mechanism are provided completely separately.

[Problem that the invention seeks to solve]

If the drive sources and drive systems for the loading mechanism and the feed mechanism are configured as completely separate systems as described above, not only will a drive motor be required for each mechanism, but a transmission mechanism for the drive force between the upper and lower speed reduction mechanisms will also be required. Since it is required for each system, the configuration of the device becomes complicated and problems arise in that the space 7 actor deteriorates.

In order to solve the above-mentioned problems, the present invention deals with the problem of how to drive the feed mechanism, loading machine, and mechanism with the same drive source.

[Ninth Means for Solving the Problem] The present invention is configured such that the loading mechanism operates in conjunction with the feed mechanism, and the feed mechanism performs the feeding operation to transport the pickup head to a certain position, and then In addition, an engagement/disengagement mechanism is provided that engages/disengages the power transmission path from the feed mechanism to the loading mechanism and switches on/off the transmission of power from the feed mechanism to the loading mechanism. t-characteristic.

〔Example〕

1 to 21 are diagrams showing one embodiment of the present invention, and are diagrams showing an embodiment in which the present invention is applied to a compact disc player.

The disc playback device (compact disc player) described here is a disc (:1 impact disc) t-
It consists of a disc magazine case A to store the disc and a device body B, and the disc is stored in the disc magazine case AK5.
2: This disk magazine case At
- It is constructed so that the entire case is loaded into the main body B of the device, and the discs stored in the disc magazine case are played back in the stored state.

FIG. 1 shows the configuration of the main parts of the device body B as well as the configuration of the disk magazine case A17).

As shown in this figure, the disk magazine case A is a plate-shaped body that is rectangular in plan view and has a constant thickness. This case A can rotatably accommodate a disc 1t in the playback state, and has a clamper insertion hole 2 formed on its top side, and a turntable insertion hole 3 and a laser beam introduction hole on its bottom side. 4 is formed, and a rack gear 5 is formed on the negative side.

The main structure of the device body B is shown in FIGS. 1 to 6. As shown in these figures, a chassis 7 is disposed within the exterior case (not shown) of the device body B, and
A carrier 8.8 is attached to this chassis 7, and furthermore, two pumps 9 and a holder 1O are supported. The chassis 7 has side plate portions 11° 11 formed at its left and right sides that are bent downward, and a long hole 12 extending in the front-rear direction is formed in the side plate portion 11. There is. Career 8 is
The chassis 7 has a shape that is approximately symmetrical between the left side of the chassis 7 and the right side of the chassis 7.

7 to 14 show details of the carrier 8 arranged on the right side. As shown in these figures, the carrier 8 has a guide bin 14, 15 formed on one side of its plate-shaped main wall 13, and a cam protrusion 16 and a carrier rack gear 17 formed on the other side. Furthermore, a synchro rack gear 18 is formed on the lower surface of the front half of the main wall portion 13.

The upper surface of the earthen wall portion 13 includes a flat portion 19a and a flat portion 19.
a sloped portion 19i+ that slopes downward from the front end of a, and a flat portion 19c that extends slightly forward from the lower end of this sloped portion 19t+.
The cam surface 19 consists of.

The guide bin 15 includes a guide portion 20 that projects laterally from the main wall portion 13, and an engaging portion 21 that further projects in any direction from the guide portion 20. The cam protrusion 16 includes a flat part 16a along the upper edge of the earth wall part 13, an inclined part 161 that slopes diagonally downward from the front end of this flat part, and a flat part 16c that extends forward from the lower end of this inclined part 1613. It consists of

Note that the carrier 8 disposed on the left side has substantially the same configuration as above, but differs from the above configuration in that the carrier rack gear 17 is not formed. The carriers 8.8 formed in this way each have a guide pin 14.15.
? It is loosely fitted into the elongated hole 12 and is attached to the chassis 7 so as to be movable in the front-rear direction. In this case guide bin 15
, the guide part 20 is located inside the elongated hole 12, and the engaging part 2
1 is located protruding inward of the chassis 7. At the lower ends of the side plates 11.11 of the chassis 7, holes 22.11 are formed in the side plates 11, 11, as shown in FIG.
A shaft 23 is rotatably mounted through the shaft 22t, and a synchro pinion gear 24, 24 is fixed to the end of the shaft 23 projecting outward from the side plate 11. These synchro pinion gears 24.24 are $
As shown in FIGS. 3 to 5, the synchro rack gears 18 and 18 of the carriers 8 and 8 are engaged with each other. Based on this configuration, when one of the carriers 8, 8 moves in the longitudinal direction, the synchronized pinion gear 24, 24, the shaft 23, and the other move in exactly the same way, that is, synchronously. Move forward and backward.

The clamper 9 has a disk 1t mounted at the center of the lower surface of the support plate 25.
- A disc-shaped clamper body 26't to be held is attached. The support plate 25 has front and rear side plate portions 27, 27.28° 28 formed on both sides thereof, respectively, and elongated holes 29.
29, 30.30 are formed. Side plate part 28.28
There is a pin 31゜311i through the 2 pump arm 32j3
One end of each of the two member arms 32 and 32 is rotatably attached to the chassis 7, and the other end of the two member arms 32.
72: Rotatably attached to the protrusion 34.33 via a pin 34.34t. Seven lower pins 35.3 are provided at the lower end of the side plate portion 27 so as to protrude inwardly from the support plate 25.
5 is fixed, and 7 lower pin 35.35 engages the cam surface 19.19 of the carrier 8.8.

The holder IOU is a member that is housed inside the disk magazine case A't- to hold it, and is formed into a window frame shape in plan view and is an upper member. This holder lO has an opening 37 formed at its front end for inserting the disk magazine case At, and openings 38.3 at both sides thereof.
A support protrusion 39 is formed at the upper part of the opening 38 on one side (on the right side). A holder arm 41 is attached to both sides of the front end of the holder 10 through a pin 40.40t.
41 is rotatably mounted, and the holder arm 41
．． The other end of 41 is fixed to the side plate 11 of the chassis 7 through a long hole 42.42 formed therein, and a multiplication table bin 43, 43 is fitted therein. Further, pins 44, 44, 45° 45 are fixed to both sides of the holder lO, respectively, and these pins 44, 44, 45, 45 are connected to clampers 9, 9, respectively.
It is inserted into the elongated hole 29°29.30.30.

Under the above configuration, the holder IO can move vertically within the range in which the pins 43, 43 can move relative to each other within the elongated holes 42°42. The clamper arm 32, 32f of the clamper 9 can be rotated vertically in a substantially wet state. In this case, holder 1
The vertical movement of the clamper 9 relative to 0 is carried out by the pull pin 44.
．． 44, 45 degrees 45 are limited within the range in which they can be moved relative to each other within the long holes 29, 29, 30, 30. Here, the clamper 9 is always urged upward with respect to the holder 10 by a hold spring 46, 46 interposed between the lower surface of the clamper 9 and the upper surface of the holder 10. .

A limit switch 4B is attached to one opening 38 of the holder 10. This limit switch 48 is for detecting whether the disk magazine case A is inserted into a certain position in the holder 10 or not.
As shown in Figure 2, the actuator 49 is connected to the holder 1.
It protrudes inward from 0.

A synchro pinion gear 24.24 is fixed to the lower end of the side plate 11.11 of the chassis 7, and a shaft body 23 is disposed thereon. Both ends of the shaft body 23 protrude outward from the synchro pinion gear 24.24. One end of each arm 55 and 55 is rotatably attached to the
ing. Pins 56 . A flang spring 58.degree. 58 is stretched between it and 57. Here, the bin 56.56 projects outwardly from the clamping arm 55.55, while also projecting inwardly (in the direction of the carrier 8), and this inwardly projecting portion is the carrier 8, Under this structure, the clamper 9 is always urged downward by the flanged springs 58, 58.

In this case, the working length of the spring 58.58 is the 20th
The states shown in Figures (a) to (0) (Figure 20 (a) is before loading, Figure 20 (a) is during loading, and Figure 20 (C) is the playback status. L3a and L2 are set so that a small spring constant is sufficient to obtain a sufficient lamp force.

A support protrusion 6 is provided at the lower end of one side plate part 11 of the chassis 7 at a position facing the support protrusion 39 of the holder 10.
A carrier pinion gear 62 is formed on the upper surface of this protrusion 60 and inside the recess 61 is a carrier pinion gear 62 on the outer peripheral surface.
A sedge line joint 63 is rotatably supported. Details of the spline joint 63 and carrier pinion gear 62 are shown in Figure 15! This is shown in Figure 17. As shown in these figures, the tin line joint 63 is a cylindrical member, and its hole 63a
An engaging groove 64 is formed on the inner surface of the hole 63a in the axial direction of the hole 63a.
・is formed. The carrier pinion gear 62 is integrally formed on the outer peripheral surface of the upper end of the spline joint 63. This carrier pinion gear 62 is engaged with the carrier rack gear 17 of the carrier 8 in the next state when the spliner intro 3 is supported as described above. On the other hand, the support protrusion 39 of the holder 10 is inserted into a spline joint 63 on the outer circumferential surface of the lower end, and is rotatably supported. Spline shaft 65 butterfly, 1st
It has the shape shown in FIG. 8, and has an engaging portion 66 on the outer circumferential surface of the lower end thereof that engages with the engaging groove 64 of the spline joint 63. This sedge line shaft 65 is
The lower end St- is inserted into the hole 63a of the spline joint 63, and in the next state, it is movable up and down relative to the spline joint 63, and when the spline joint 63 rotates, the engaging portion 66 ... are engaged with the engagement grooves 64, so that they rotate together with the spline joint 63. Moreover, this spline shaft 7 65 is
The outer diameter of the lower end of the shaft is smaller than the inner diameter of the hole 63a of the spline joint 63, and the engaging part 66 is semicircular when viewed from the side. The engaging portion 66 for the spline joint 63
It can be tilted slightly around the part where ... is formed.

A disc-shaped friction plate 67 is fixed to the upper end of the spline shaft 65, and a loading pinion gear 68 is rotatably attached to the upper surface of the primary friction plate 67, and the supporting protrusion 39 and the loading pinion gear 68 are connected to each other. Interposed between the clutch spring 69 and the clutch spring 69 is wound. Here, the loading pinion gear 68 has a part of its outer periphery passed through the opening 38t of the holder 10.
When the disk magazine case A is inserted into the holder 10, it meshes with the rack gear 5 of the case A. This driving pinion gear 68 is formed to have a larger diameter than the carrier pinion gear 62, and has a gear ratio larger than l to the carrier pinion 62.

As a result, when the loading pinion gear 68 is rotated to transfer the disk magazine case A, as will be described later, a slight movement of the carrier 8 causes the disk magazine case A to move significantly. This loading pinion gear 68 is constantly pressed against the friction plate 67 by the clutch spring 69, and when rotated with a force exceeding a certain value, it can rotate with sluggishness against the friction plate 67. When the friction plate 67 rotates together with the spline shaft 65, it rotates together with the friction plate 67, and when an overload is applied during rotation, it lags against the friction plate 67, allowing only the friction plate 67 side to rotate. Thus, the friction plate 67 and the loading pinion gear 68 constitute a friction clutch mechanism 70t.

A disk drive upper plate 75 is fixed to the central lower surface of the chassis 7, and a turntable 76 is fixed to a rotating shaft of the Tanabata 75 that projects upward from the chassis 7. Here, the turntable 76 is located opposite the clamper main body 26 of the clamper 9.

Below the rear end of the chassis 7, as shown in FIGS. 1 and 6, there are two guide shafts 7) 80 extending in the front and back direction.
．． 80 are arranged. These guide shafts 80
．． A head base 82 to which a pickup head 81 is attached is attached to the head 80 so as to be movable in the front and rear directions. Support wall guide shafts 80 and 80 each having an n hole 83t are inserted into the head base 82 to have an n* configuration. On the side of one guide shaft 80 there is a feed
A loading motor 85 is provided, and the rotational force of this motor 85 is transmitted to one side of the head base 82 through a belt 86, a gooey 87, and a gear 88 that is coaxially fixed to this gooley 87 and has a small diameter. A nine-diameter gear 89 is placed nearby.
It is designed to be transmitted to A feed/four-way loading pinion gear 90 is fixed coaxially above the gear 89, and this feed/loading pinion gear 90 is meshed with a feed/loading rack gear 9 constructed on one side of the helad base 82. ing.

Based on this configuration, the feed loading motor 85
When t-rotated, Guri 87, gear 8g, 89
The rotational force decelerated by 2, etc. is transmitted to the pinion 90, and this pinion gear 90 moves the rack gear 91t, and the head base 82 moves forward or backward. Here, the signal reading section 81a of the pickup head 81 is
When the disc magazine case A is placed in a fixed position where the disc 1t can be reproduced, the signal recorded on the disc 1 is read by moving in the front and back direction just below the laser beam introduction hole 4. I can do it. here,
As described above, the head base 82 has a range in which the pickup head Sl0g reading part 81a can read the signal of the disc l, that is, the signal reading part 34a is located at the lead-in position of the disc 1 (where the signal of the disc l is recorded). Not only can you move the range from the start end position of the track mentioned above (usually the innermost track position) to the lead-out position of disc 1 (the last end position of the track mentioned above, usually the outermost track position), but also the following The signal reading section 8 allows the mode switching mechanism 112 to switch between loading, play, and eject modes.
11! L can be moved from the lead-out position to a predetermined position on the outside in the medial direction of the disc 1, that is, until a bushing rod 93 of a bushing switch 94 contacts a stopper 110 km, which will be described later. The above mechanism for moving the pickup head 81yk constitutes a feed mechanism 92 together with a tracking servo control device so that the optical heat point of the pickup head 810 always aligns with the signal track recorded on the disk 1.

An engagement step 82a is formed at the other end of the head base 82.
2 moves in the direction of arrow P □ direction C, and when carrier 8
to move the carrier 8 in the direction of arrow P□. i9. On the top surface of the other end of the head base 82,
A bushing switch 94 is attached with a bushing rod 93 protruding rearward. In addition, the head base 82
A guide 95.95 is formed on the upper surface of the other side,
Inside these guides 95j95 is the bushing rod 93.
A slide hook 96 is attached so that the slide hook 96 can be moved in the left and right direction intersecting with the slide hook 96. A bottle 97 is fixed to the upper surface of one end of the slide hook 96, and one end of a return spring 98 is hooked to the bottle 97. Bins 99 and 100 are fixed to the upper surface of the slide pace 82, and the middle part of the return spring 98 is wound around the bin 99, and the other end is hooked to the bin 10G. Based on this configuration, the slide hook 96 is always urged (by the return spring 98) in the direction of arrow P3 (to the left).

The bushing switch 94 is configured to provide a trigger to a control circuit that controls on/off of the feed/rotating motor 85, and also operates to switch between the loading mode, the eject mode, and the playback mode as described in 4. It is constructed as a so-called gusset switch.

The details of the configuration of this switch 94 are shown in FIG. That is, in this switch 94, the bushing rod 93 is initially moved in the direction of the arrow P2, and the n1 switch body 10
When the switch body 102 is locked inward (in the position shown by the solid line in the figure), the circuit inside the switch body 102 is set to the active state. When the bushing rod 93 is further pushed a little in the direction of arrow P2 in this state, the above-mentioned lock is released, and the bushing rod 93 is urged by a spring (not shown) and moves in the direction of arrow P1, as indicated by the two-dot chain line in the figure. Move to the protruding position shown. At this time, the electric circuit within the switch body 102 is turned off. Then, when the bushing rod 93 is pushed again in the direction of arrow P2, the cylindrical rod 93 is locked at the initial solid line position, and the circuit within the switch body 102 is turned on.

The bushing rod 94 of this bushing switch 94 has an operating rod part 104 formed at the tip of a crown part 103, and an operating protrusion 105 extending rearward at the rear end of the bushing rod part 104. are formed and are being formed.

As shown in FIG. ) side has a cam surface 1. “08 has been formed.

This slide 7 hook 96 moves the main wall @ 107 to the operating protrusion 1.
05 and the main frame portion 104, and the cam surface 108t
- It is arranged so as to abut the operating protrusion 105 and intersect with the bushing rod 94 in a cross shape.

Based on the above configuration, the bush switch 94
- In JilJC, in which the a-ad 93 is moved in the direction of arrow P2 and locked at the solid line position, the cam surface 10B of the slide hook 96 is pushed by the operating protrusion 105, so that - this slide 7 The claw 96 is moved in the direction of arrow P4 and located at the protruding position (solid line position). From this state, the bushing rod 93 is pushed slightly in the direction of arrow P2,
After the above four locks are released, the bushing rod 93 is moved to the arrow P.
0 direction and protrudes to the position shown by the two-dot chain line, the operating protrusion 105 moves in the arrow PY direction, and the cam surface 108 of the slide hook 96 becomes in a state where it can move in the arrow P3 direction. This slide hook 96 moves in the direction of arrow P3 by the biasing force of the return spring 98 and retreats to the position shown by the two-dot chain line.

The slide lever 96, which operates as described above, is located protruding in the direction of arrow P4 in the state shown in FIG. In this state, the head base 82 is located at arrow J? ,
When the slide hook 96 moves in the direction shown in FIG.
2 may move the carrier 8 forward. ! If the slide hook 96 moves backward in the direction of arrow P3, the slide hook 96 will not engage with the engaging portion 21.

A stopper 11G is disposed behind the movement path of the head base 82, with which the bushing rod 93 of the bushing switch 94 comes into contact when the head base 82 moves a predetermined distance in the direction of arrow P. Based on this #II configuration, the bushing switch 94 can be switched when the head base 82 moves back and forth (in the direction of arrow P2゜P) and the bushing rod 93 comes into contact with the stone/<110. ing.

In the above configuration, a mechanism for moving the head base 82 in the forward direction and a mechanism for rotating the loading pinion gear 68t in conjunction with the movement of the head base 82 as described later constitutes a loading mechanism 111t. M1 Head base 82 Button switch 94, Slide foot/96, Return spring 98, Engagement part 2 of carrier 8
1 constitutes an engagement/disengagement mechanism 112t that switches on/off transmission of power from the feed mechanism 92 to the loading mechanism 111.

In the above configuration, the loading switch 48 and the bushing switch 94 constitute a part of the control circuit, and control the feed/receiving motor 850: ON/OFF'f. Next, the control circuit receives various operation commands by operating a play button, a stop button, a loading button, an eject button, etc. (not shown) provided on the device body B.

Next, regarding the operation of the disk playback device having the above configuration during disk playback, FIGS. 1 to 6 and 201
, will be explained with reference to FIG.

First, the device main body B is in a standby state before inserting the dimension magazine case At, and as shown in FIG. 20(a), the clamper 9 and the holder 10 are raised to enter the ratio state. At this time, the bushing rod 9 of the bushing switch 94
3 is moved in the direction of arrow P2 and locked in the north position as shown in FIG. 21(a).

To play the disc 1, the disc 1 is stored and the next disc magazine case A is inserted into the holder 10 as shown in FIG. 20(c).

To be more specific, the disc magazine case A is connected to an actuator 49 whose tip end is a loading switch 48.
, and manually insert the rack gear 5 until the tip thereof meshes with the loading pinion gear 68. Then, the loading switch 48 is turned on, thereby turning on the feed/loading motor 85. When the feed/loading motor 85 rotates, this rotational force is transmitted to the feed/loading pinion gear 90.
This pinion gear 90 moves the helad base 82 to the arrow P□
move in the direction. When the head base 82 moves in the direction of arrow P1, as shown in FIG. At the same time, the carrier 8 moves in the direction of arrow P. When the carrier 8 moves in the same direction, the carrier pinion gear 62 meshing with the caliber rack gear 17 of the carrier 8 rotates as shown in FIG. 20 (1)). This causes the spline joint 63 to rotate and the spline shaft 6.
5. The $ swing plate 67 rotates. When the friction plate 67 rotates,
The loading pinion gear 68 that is in pressure contact with this nine rotates, and the two
The lock gear 5 is engaged, and the disk magazine case A is moved in the direction of arrow P1, that is, inward of the holder 10. Here, the inner end of the bottle JI3 fixed to the clamping arm 55 is initially in contact with the flat part 16a of the cam protrusion 16 as shown in FIG. Figure 20 (1) as you move in the direction
), the clamping arm 55 rotates in the direction of arrow P5 while gradually pulling the flang spring 5B. Fixed 7 oroabin 3
5 is initially in contact with the flat portion 19aKi of the cam surface 19 of the carrier 8 as shown in FIG. 20 (IL), but as the carrier 8 moves in the direction of the arrow P,
As shown in FIG. As a result, the spring 2 member 9 has a hold spring 46
While lowering the holder 10 via the holder 10, the holder 10 also lowers itself. Here, the members attached to the spline shaft 65, such as the loading pinion gear 68, descend together with the holder 10 while rotating, since the spline shaft 65 and the spline joint 63 are spline-coupled. As shown in FIG. 21(C), the disk magazine case A moving in the direction of the arrow P1 thus descends together with the holder 10, with the center of its turntable insertion hole 3 being located at the center blade of the turntable 76. Here, the follower bin 35 comes into contact with the flat part 190 of the cam surface 19, as shown in FIG. 20(C), and positions the clamper 9 and holder 10 at the lower limit position. It, the pin 56 comes into contact with the flat portion 16cVci of the cam protrusion 16, and the clamping arm 55t is further rotated in the direction of arrow P5 to strongly pull the flang spring 58. The friend clamper 9 moves relatively close to the holder IO by deforming the shield spring 46 so that the flang spring 58 is strongly pulled as described above.
The clamper body 26 enters the case A through the disc magazine case A glue 2 and the clamper insertion hole 2, and is placed above the disc l of the disc magazine case A, and the clamper 1 is inserted into the case A.
20. On the other hand, at this time, since the disc magazine case A supported by the holder 10 is lowered, the turntable 76 relatively enters the turntable insertion hole 3 of the disc magazine case A and comes into contact with the lower surface of the disc 1. Thus, the disk 1 in the disk magazine case A is moved through the clamper 12 (l) of the case person.
These two members are held between the main body 26 and the turntable 76.

In this operation, when the turntable insertion hole 3 of the disk magazine case A approaches the upper part of the turntable 76, the tip of the disk magazine case A is inserted into the holder 10.
It comes into contact with a 7t stopper (not shown) and stops its movement. Here, the moving length of the carrier 8 up to this point is shorter than the moving length of the disk magazine case A, but the loading pinion gear 68 relative to the carrier pinion gear 62
Since the gear ratio is greater than l, the disk magazine case A moves a much longer distance than the moving length of the carrier 8 and comes into contact with the stopper as described above. At this time, the loading pinion gear 68, together with the friction plate 67, forms the clutch mechanism 70t, so even though the friction plate 67 is rotating, it slips against the friction plate 67 and prevents its rotation. Stop. Thereafter, the disk magazine case A descends in a state where it meshes with the loading pinion gear 68 which slips against the friction plate 67, and reaches the lower limit position.

When the t7t1 holder 1G descends, the holder 10 is supported by the chassis 7 via the holder arm 41t, and is supported by the clamper 9, as well as by the clamper 9.
Since the holder 10 is supported by the chassis 7 via the 2-member arm 32, the holder 10 rotates the holder arm 41 and the clamper arm 32 in a slight arc in the front-rear direction (in the direction of arrows P2 and P1). . Therefore,
The spline shaft 65, whose upper end is supported by the holder 10, tilts slightly in the front-rear direction at its upper end. Here, the spline shaft 65 can tilt relative to the spline joint 63 as described above. Therefore, at this time, power is transmitted from the spline joint 63 to the spline shaft 65 without any problem.

On the other hand, when the disk magazine case A is placed in a fixed position where playback is possible as described above, the bushing rod 93 of the bushing switch 94 comes into contact with the stopper 110, as shown in FIG. 21(C). This cancels the loading mode and enters the playback (acting) mode. That is, when the bushing rod 93 comes into contact with the stopper 110, the bushing rod 93 is relatively pushed a little in the direction of the arrow P2, and then the bushing rod 93 projects in the direction of the arrow P0 by the action of a sliding ring (not shown). This turns off the bushing switch 94. When the bush switch 94 is turned off, the control circuit operates the feed/loading motor 85t after a certain time lag.
-Reverse. Furthermore, the slide hook 96 is moved back in the direction of arrow P3 by the force of the return spring 98. When the motor 85 is driven in the reverse direction, the head base 82 is moved in the direction of arrow P2 as shown in FIG.

In addition, when moving the head base 82 at this time,
Since the engagement stepped portion 81 separates from the engagement portion 21, the carrier 8
remains in that position. When the head base 82 moves in the direction of arrow P2, the signal reading section 81a of the pickup head 81 moves directly below the laser beam introduction hole 4 of the disk magazine case A in the direction of arrow P2. When the signal reading section 81a reaches the lead-in position of the disk 1, the head base 82 comes into contact with a limit switch (not shown), which causes the feed/loading motor 85 to
stops, and the movement of the head base 82 stops.

When the lead-in position is detected as described above, the disk drive motor 75 is turned on, the turntable 76 rotates, and the disk 1 rotates together with the turntable 76. The feed/loading motor 85 is turned on each time the tracking servo by the trunking arm 2- and the like reaches its limit, and moves the pink-up head 81t-arrow P□ by a predetermined amount in the force direction. In this way, the signal reading section 81a of the pickup head 81 properly reads the signal recorded on the disc 1 through the laser beam introduction hole 4t, and the reproduction of the disc is improved.

When the reproduction of the disc Φ is completed, a lead-out detection device (not shown) detects the end of the track on which the signal of the disc I is recorded, and this detection signal is sent to the control circuit. The control circuit switches the feed/loading motor 85 from the regeneration mode to the ejection preparation mode based on the above signal. As a result, the head base 82
21(e) to 21(f), the pickup head 81 is moved away from the disk 1 in the direction of arrow P1. And the bush switch 94
The bushing rod 83 comes into contact with the stopper ll0K, and the bushing switch 94 is turned on. At this point, the device shifts to eject mode. That is, at this time, the bushing rod 93 comes into contact with the stopper 110 and moves in the direction of arrow P2, so that the slide 7 claw 96 projects in the direction of arrow P4. When the control device is set, the button switch 9
4 turns on and feeds after a certain time lag.
Reverse loading Tanabata 85. This causes the head base 82 to move in the direction of arrow P2. Here, since the slide hook 96 protrudes in the direction of arrow P4, this slide hook 96 engages with the engaging portion 21 of the carrier 8 as shown in FIG.
Move in two directions. When the carrier 8 is moved in the direction of arrow P2, the carrier rack gear 17 rotates the carrier pinion gear 62 in the same way as in the case of loading the container as described above, thereby causing the grinder 7) 65 and the friction plate 67 to rotate.
rotates, and the loading pinion gear 68 rotates.

At this time, the loading pinion gear 68 rotates in the opposite direction to that during loading, and moves the disk magazine case At in the direction of arrow P2. The rear end of the disk magazine case A is the loading switch 4B.
When the feed/loading motor 85 is separated from the actuator 49, the control circuit turns off the feed/loading motor 85, thereby terminating the eject mode. In this way, the device returns to its initial state as shown in FIG.

Thus, according to this disc playback device, the loading mechanism 111 is operated in conjunction with the feed mechanism 92, and the loading mechanism 111 is operated from the feed mechanism 92.
Engagement/disengagement mechanism 112 for turning on/off transmission of power to
Since the feed mechanism 92 is switched by
The loading mechanism 111t can be driven by a single feed/loading motor 85, thereby simplifying the configuration of the device and improving the space 7 actor.

In addition, since the engagement/disengagement mechanism 112 uses the nine-button switch 94 configured as a pushbutton switch, it is possible to turn on and off power transmission between the feed mechanism 92 and the loading mechanism 111. By switching this bushing switch 94, the rotation of the feed/loading motor 850 can be controlled, and there is no need to provide a separate switch for controlling the feed/loading motor 85. This switching of power transmission on and off is configured so that power transmission is turned on in the eject mode, so that case A can be transferred to the eject position by power transmission from the feed mechanism 92. The device can be put into a standby state in preparation for the next loading operation, and the power transmission is turned off in the playback mode, so that the feed mechanism 92 is not used as a pick-up head during playback. You can concentrate on driving without any extra load.

In the above embodiment, the disks are stored in a disk magazine case and loaded into the device body, but it is also possible to provide a tray or the like for feeding the disks on the device body side and load the disks directly into the device body. may be configured.

[Effects of the Invention] According to this invention, the loading mechanism is interlocked with the t-feed mechanism, and the power transmission of these mechanisms is switched on and off by the engagement/disengagement mechanism.
The drive source for the feed mechanism and the loading mechanism can be the same, and the power transmission of the drive source can be rationally switched, which simplifies the configuration.
Space 7 actors can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Figure 1 is a plan view of the main parts of a disc playback device, Figure 2 is a plan view of the disc playback device, and Figure 3 is a top view of the disc playback device. ■Fixation side scream~
Figure 4 is a side view of the second factor IV-IV; is a plan view of the carrier, FIG. 8 is a front view of the same, FIG. 9 is a cross-sectional view of the 8th prisoner IX-IX fixation, FIG. 10 is a rear view of the carrier, and FIG. 11 is a fixation view of FIG. 8 XI-XI. A side view, FIG. 12 is a fixed side view of FIG. 8 16 is a plan view of the spline joint and carrier pinion gear, Figure 16 is a vertical sectional view taken along the line M-M in Figure 15, and Figure 17 is Figure 16)
8 is a front view of the spline shaft, FIG. 19 is a perspective view showing details of the bushing switch and slide hook, and FIGS.
1A to 1B are explanatory diagrams of the operation of the disc reproducing apparatus. A...Case (tisf magazine case), B
...Device body, 1 ...Disc, 85
・・・・・・Drive source (feed/loading motor)
, 92...feed mechanism, 111...
Loading mechanism, 112... Engagement/disengagement mechanism.

Claims (1)

[Claims] A loading mechanism that transports a disc or a case containing a disc between an eject position where it is loaded and unloaded and a fixed position where the disc can be played, and a pickup head that reads the signal recorded on the disc. In the disc playback device, the loading mechanism is configured to operate in conjunction with the feeding mechanism, and the feeding mechanism is configured to operate in conjunction with the feeding mechanism. When the pickup head is moved to a certain position by performing an operation, the power transmission path from the feed mechanism to the loading mechanism is engaged/disengaged to switch on/off the transmission of power from the feed mechanism to the loading mechanism. A disc playback device characterized by being provided with an engagement/disengagement mechanism.