JPH056600Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to an optical disc record playback device suitable for, for example, an optical DAD (digital audio disc) system or an optical disc file system.

(Prior Art) Recently, in the field of audio equipment, digital recording and reproducing methods that utilize PCM (pulse code modulation) technology are becoming popular in order to achieve as high fidelity reproduction as possible. This is called digital audio, and it has been established in principle that the audio characteristics are far superior to conventional analog systems without depending on the characteristics of the recording medium. A system that uses a disk as a recording medium is called a DAD system, and playback methods include optical, electrostatic, mechanical, etc. For example, among optical playback methods, CD
An optical disc record playback device using the (compact disc) method uses a transparent disc with a diameter of 12 mm and a thickness of 1.2 mm, on which a metal film with pits corresponding to digitized (PCM) data is formed.
Approximately 500~200r by CLV (constant linear velocity) method
Rotate at a variable rotation speed of p/m. At the same time, the digitized data is reproduced from the disk using an optical pickup containing a semiconductor laser and a light conversion element in a linear tracking manner from the inner circumference to the outer circumference. This disk has a pitch of 1.6 .mu.m, and a huge amount of information is recorded on one side, allowing for approximately one hour of stereo playback.

The next requirement for the above-mentioned optical disc record playback device is to ensure compactness with an efficient and simple configuration, and to simplify the handling of the disc so that it can be used in a variety of ways. That's true.

Conventionally, the specific targets of such requests are:
By configuring it as a so-called cassette type, the user can hold the disk directly in his hand and attach it to the disk drive unit, then store it in a disk case and attach it to the disk drive unit in the stored state. It has been considered to simplify the handling of disks and to protect them.

On the other hand, this type of disc record playback device is
It must be able to meet various demands for miniaturization in relation to various mechanical parts such as a pickup drive mechanism and a disk drive unit. In other words, compared to the conventional system in which the disk is attached to and removed from the turntable without being housed in a disk case,
This is because the configuration includes many factors that increase the size of the entire device.

(Problems to be solved by the invention) This invention was made in view of the above-mentioned requirements for the cassette type.It has a simple structure, can be made compact, and can simplify disk handling. The purpose of the present invention is to provide an optical disc record playback device.

[Structure of the device] (Means and effects for solving the problem) This device is constructed by attaching and detaching an optical disk to and from a disk drive unit provided in a disk storage section while the optical disk is housed in a disk case. In the optical disc record playback device, a regulating member provided in the disc accommodating part and engaging with a part of the disc case accommodated therein to regulate the position of the disc case; a sloping part that has a light sloping surface that controls the disc case, and that releases the engagement between the regulating member and the disc casing when the slanted surface slides on the disc casing; A discharge member is integrally provided with a discharge portion for discharging the disk case from the disk housing portion after the case position restriction is released, and the inclined portion acts on the discharge member first with respect to the disk case. and a discharge drive mechanism that controls the drive so that the discharge section is activated, so that the discharge operation of the disk case from the disk storage section can be performed in one step.

(Example) Hereinafter, an example of this invention will be described in detail with reference to the drawings.

Figures 1 and 2 show the front and back sides of an optical disc record playback device according to an embodiment of this invention, in which reference numeral 10 denotes a housing 11 (not shown in Figure 2). The main chassis is housed inside. A turntable 12 constituting a disk drive section is disposed approximately at the center of the main chassis 10 so as to be movable in the axial direction (directions of arrows A and B). As this turntable 12 moves in the direction of arrow A, the through hole 13 of the disk case 13
It has an engaging portion 12a that penetrates into the interior from a hole 14a of the disk 14 and is fitted to a clamper (not shown) so that the disk can be driven. As shown, a drive section 17 consisting of a stator 15 and a rotor 16 is connected. One end of a lift lever 18 is engaged with the rotor 16 of the drive unit 17 .
The intermediate portion of the lift lever 18 is rotatably supported by the main chassis 10 via a shaft 18a, and a spring member 19 is attached to the shaft 18a to apply its spring force to bias the turntable 12 in the direction of arrow B. It will be worn. A cam 21 for holding and driving a disk formed on one side of a cam gear 20 is engaged with the other end of the elevating lever 18, and a switch driving section 21a is disposed in the main chassis 10 on this cam 21. It is formed corresponding to the mode detection switch 22 (see FIG. 4). The cam gear 20 is rotatably supported by the main chassis 10, and a worm gear 25, which is fitted to the rotating shaft of a drive motor 24 via an intermediate gear 23, is meshed with the gear portion 20a of the cam gear 20. Further, on the other side of the cam gear 20, an engagement protrusion 26 for disengaging the disk case is provided on the cam 2.
1, and one end of a discharge slider 27 corresponds to this engagement protrusion 26. As shown in FIG. 5, this discharge slider 27 is supported by the main chassis 10 so as to be movable in the directions of arrows C and D.
A spring member 28 is attached to the intermediate portion so as to apply its spring force in the direction of arrow C. A switch drive section 27a is formed in the middle of the discharge slider 27, and a position detection switch 29 disposed on the main chassis 10 is connected to the switch drive section 27a.
will be addressed. An engaging portion 27b is formed at the other end of the discharge slider 27, and this engaging portion 27b
corresponds to an engagement pin 30a formed at one end of a first ejection lever 30 constituting an ejection member.
This first ejection lever 30 has a rotating shaft 30 in the middle part.
The spring member 31 is rotatably supported by the main chassis 10 via the spring member b, and a spring member 31 is engaged between one end of the spring member 31 and the main chassis 10 so as to apply its spring force in the counterclockwise direction in FIG. An intermediate portion of a second ejection lever 32 is rotatably supported at the other end of the first ejection lever 30 via a rotation shaft 32a. The second ejection lever 32 has, for example, a detachment part 33 formed at one end thereof, which is inclined downward in the ejection direction (direction of arrow C), facing the end of the disk case 13 (see FIG. 6), and at the other end. A discharge portion 34 is formed facing the end of the disk case 13. Then, this second ejection lever 3
An engaging portion 32b is provided at one end of the main chassis 1.
The protrusion 10a is formed at a predetermined position of the protrusion 10a.

The main chassis 10 also has a case housing portion 35 corresponding to the case insertion hole 11a of the housing 11.
(See Figure 1). A guide section 3 for guiding the disk case is provided on both sides of the disk storage section 35.
6 and 36 are formed, and the disk case 13 is guided in and out of the guide portions 36 and 36 in the directions of arrows C and D. A pair of sliding guide receiving pins 37, 37 are provided on the lower surface of the disc accommodating portion 35 near the insertion hole at one end of the turntable 10, and a pair of positioning pins are provided at the other end of the turntable 10. 38, 38 (only one side is shown in FIG. 1) are provided corresponding to the positioning holes 13b, 13b of the disk case 13. Holding springs 39, 39 for positioning are arranged on the upper surfaces of the guide portions 36, 36 at a predetermined distance from each other, corresponding to the upper surface of the disk case.

Further, in the other part of the main chassis 10, for example, an optical pickup 40 for recording and reproducing a disk is disposed so as to be movable in the directions of arrows C and D via a guide shaft 41, and when it is stopped, the optical pickup 40 is moved most in the direction of arrow D. Ru. A linear motor 42 is disposed at one end of the pickup 40, and a speed detector 43 is disposed at the other end. This linear motor 4
Similarly, permanent magnets 42b and 43b are respectively attached to the side walls of yoke members 42a and 43a which are magnetized in the thickness direction, and each yoke corresponds to the permanent magnets 42b and 43b. Drive coils 42d and 43d, which are wound around bobbins 42c and 43c, are attached to members 42a and 43a as indicated by arrows C and 43d, respectively.
It is arranged to be movable in the D direction. The bobbins 42c and 43c of the drive coils 42d and 43d are fixed to the pick-up 40, respectively. The linear motor 42 and the speed detector 43 are arranged on the main chassis 10 so that the magnetized surfaces of the yoke members 42a and 43a are substantially perpendicular to each other.

Further, a holding member 44 for holding a pickup is rotatably disposed on the main chassis 10 via a rotation shaft 44a. This holding member 44 is disposed at an intermediate portion between the receiving pins 37, 37 of the guide portions 36, 36 and the positioning pins 38, 38, and is biased counterclockwise in FIG. 7 via a spring member (not shown). A driving portion 44b that comes into contact with the disk case 13 is formed at one end of the driving portion 44b (see FIG. 7). A locking portion 44c is formed at the other end of the holding member 44 so as to correspond to the pickup 40. This holding member 44 is attached to the disk case 13.
The locking portion 44c is rotated in conjunction with the in/out movement of the pick-up 40, and in its engaged state, the locking portion 44c is separated from the pick-up 40 located furthest in the direction of arrow D (see FIG. Lock it (see a in the same figure).

Further, one end of a disk case locking member 45 is rotatably supported on the main chassis 10 in correspondence with the case housing portion 35.
The middle part of this locking member 45 is
As shown in the figure, a spring member 46 is engaged so as to apply its spring force clockwise in the figure, and a lock part 45a is formed at the other end corresponding to the recess 13c formed in the disk case 13. be done. At the other end of this locking member 45, a switch driving section 45b is connected to a lock detection switch 4 for detecting a disk case lock, which is disposed in the main chassis 10.
7. When the disk case 13 is inserted into the case accommodating portion 35 to a predetermined position, the lock member 45 is urged to rotate counterclockwise in the figure by the disk case 13 against the spring force of the spring member 46. The switch drive section 45b is rotated in the same direction, turning off the lock detection switch 47 once (see FIGS. 9a and 9b), and then turning off the lock detection switch 47.
When a is locked in the recess of the disk case, the lock detection switch 47 is activated again by the switch drive section 45b.
to turn it on (see Figure 9c). Also,
A case detection switch 48 for detecting a disk case is provided in the main chassis 10 in correspondence with the case housing section. This case detection switch 4
8 is turned on by the disk case 13 when the disk case 13 is accommodated in the case accommodating portion 35 (see FIG. 8c).

Further, an intermediate portion of an erroneous erasure prevention lever 49 is rotatably disposed on the main chassis 10 via a rotation shaft 49a. A detection portion 49b corresponding to the erroneous erasure prevention claw 50 formed on the disk case 13 is formed at one end of this erroneous erasure prevention lever 49,
At the other end, a drive section 49c corresponds to a detection switch 51 connected to the disk drive section. The erroneous erasure prevention lever 49 is biased clockwise in FIG. 1 via a spring member (not shown). When the disk case 13 is attached to the case accommodating portion 35, this erroneous erasure prevention lever 49 is activated by a spring member (not shown) depending on the presence or absence of the erroneous erasure prevention claw 50 of the disk case 13. is rotated by the spring force to turn off the detection switch 51,
The disk drive unit is stopped to prevent disk recording.

Now, the optical disc record reproducing apparatus constructed as described above operates as described below.

That is, the disk case 13 in which the disk 14 is housed after the playback or recording operation is operated.
When the disk case 13 is inserted into the insertion hole 11a of the housing 11 in the direction of arrow D, the disk case 13 is inserted into the guide portions 36, 3.
6 retaining springs 39, 39 and receiving pins 37, 37
(Fig. 5 a, b)
), the driving portion 44 of the holding member 44 at its tip end.
b is rotated clockwise in FIG. 7 against the spring force of the spring member (not shown) to separate the locking portion 44c from the pick-up 40 (see FIG. 7).
When the disk case 13 is inserted to a predetermined position, the disk case 13 locks the locking member 45 into the spring member 4 at time _T1 as shown in FIG.
The lock detection switch 47 is turned off once against the spring force of 6 (see FIG. 9b), and then, at time T ₂ , the positioning hole 13b of the disk case 13,
13b is the positioning pin 3 of the main chassis 10.
8 and 38 are engaged, and the case detection switch 48 is turned on at the tip thereof. Next, at time _T3 , the lock portion 45a of the lock member 45 is locked in the recess 13c of the disk case 13, and the lock detection switch 47 is turned on (see FIG. 9c). Then, the drive motor 24 is driven as shown in FIG. 5c, and the cam gear 20 is rotationally driven.
Along with this rotation, the cam 21 of the cam gear 20 rotates the lift lever 18 against the spring force of the spring member 19, thereby moving the turntable 12 in the direction of arrow A. As a result, the engaging portion 12a of the turntable 12 is drivably fitted into the clamper (not shown) through the hole 13a of the disk case 13 and the hole 14a of the disk 14 (see FIG. 3b). reference). At this time, in the cam gear 20, the switch drive section 21a of the cam 21 turns on the mode detection switch 22 to stop the drive motor 24 (fifth
(see figure d). Here, the drive section 17 of the turntable 12 is driven, and the pickup 40 is driven.
is driven and controlled via a linear motor 42 and a speed detector 43 to perform disk reproduction or recording.

In addition, during the above-mentioned disc recording, when the disc case 13 is housed in the case accommodating part 35 at time T ₃ as described above, the presence or absence of the accidental erasure prevention claw 50 of the disc case 13 is determined by the accidental erasure prevention lever 49. It is detected by the detection unit 49a. As a result, the erroneous erasure prevention lever 49 turns off the detection switch 51 in a state where the erroneous erasure prevention claw 50 of the disk case 13 is not detected, stops the drive of the disk drive unit, and prevents erroneous erasure due to rerecording.

Next, when the disc playback or recording is completed and a stop operation member (not shown) is operated, first the drive of the linear motor 42 is stopped and the turntable 12 is stopped. At this time, the drive motor 24 is driven again, and the cam gear 20 is rotationally driven (see FIG. 5e). Then, as the cam gear 20 rotates, the cam 21 first reverses the elevator lever 18 and urges the turntable 12 to move in the direction of arrow B as shown in FIG. After that, the ejection slider 2 is disengaged from the disc case 13, and then the ejection slider 2 is disengaged from the engagement protrusion 26.
One end of 7 is engaged. When the cam gear 20 is further driven to rotate, the engagement protrusion 26 urges the ejection slider 27 to move in the direction of arrow D against the spring force of the spring member 28, turning off the position detection switch 29, and turning off the position detection switch 29. , the engagement portion 27a of the ejection slider 27 is connected to the engagement pin 30a of the first ejection lever 30.
The first ejecting lever 30 is urged to rotate clockwise in the figure. As a result, the first ejection lever 30 is urged to rotate together with the second ejection lever 32 as shown in FIGS. Lift one end of 13 and insert its positioning hole 13b,
The positioning pins 38, 38 are removed from 13b. Then, when the ejection slider 27 is further moved in the direction of arrow D, the first ejection lever 30 is rotated in the same direction, and the engaging portion 32b of the second ejection lever 32 is moved to the protrusion of the main chassis 10. It is brought into contact with the portion 10a. As a result, when the ejection slider 27 is further moved in the direction of arrow D, the second ejection lever 32 is reversed in the counterclockwise direction in the figure with respect to the first ejection lever 30 about the rotation shaft 32a. The disk case 13 is ejected from the ejection portion 34 to a predetermined position in the case storage portion 35 (see FIG. 5f). Then, one end of the ejection slider 27 that engages with the engagement protrusion 26 of the cam gear 20 is disengaged, and the ejection slider 27 is returned to its original position by the spring force of the spring member 28. on the other hand,
The first and second unloading levers 30, 32 are each reversed by the spring force of the spring member 31 and returned to their original positions (see FIG. 5g). At the same time, the discharge slider 27 turns on the position detection switch 29 with its switch drive section 27a, and the drive motor 24
to stop.

Here, when the disk case 13 is pulled out in the direction of arrow C and removed from the case housing part 35,
As shown in FIG. 7a, the holding member 44 is rotated in the counterclockwise direction in the figure by the spring force of the spring member (not shown), and the locking portion 44c of the holding member 44 is rotated in the counterclockwise direction in the figure.
The side portion of the turntable 12 is regulated so as to be held at the outermost position with respect to the turntable 12.

In this way, the optical disc record reproducing apparatus has a detachment part 33 on the second ejection lever 32, and the detachment part 33 lifts and tilts one end of the disc case 13, thereby opening the positioning holes 13b and 1.
3b, the positioning pins 38, 38 are removed from the disk case 13, and the ejecting operation can be performed in one step, so the operation can be controlled accurately. simplification is realized.

Further, in the optical disc record reproducing apparatus, the second ejecting lever 32 having a detaching part 33 and an ejecting part 34 is rotatably arranged with respect to the first ejecting lever 30. After the disk case 13 is removed by the detachment portion 33 in conjunction with the rotation, when the first ejection lever 30 is further rotated, the disk case 13 is interlocked and reversed, and the disk case 13 is ejected by the ejection portion 34. With this configuration, a large ejection stroke can be secured in a narrow space, so that miniaturization can be promoted as much as possible.

Note that this invention is not limited to the above embodiments,
It goes without saying that various other modifications can be realized without departing from the gist of the invention.

[Effects of the invention] As detailed above, according to this invention, it is possible to provide an optical disc record playback device that has a simple configuration, can be downsized, and can simplify disc handling. I can do it.

[Brief explanation of the drawing]

1 and 2 are configuration explanatory diagrams showing an optical disc record playback device according to an embodiment of the invention, FIGS. 3 and 4 are sectional views and perspective views showing the main parts of FIG. 2, Figure 5 is a diagram showing the operating state of Figures 1 and 2, Figure 6 is a diagram showing the main parts of the ejection mechanism in Figure 5, and Figure 7 is the pick-up holding mechanism in Figures 1 and 2. 8 and 9 are diagrams showing the locking mechanism of the disk case, and FIG. 10 is a timing chart shown to explain the operation of FIG. 9. 10...Main chassis, 11...Casing, 11
a...Insertion hole, 12...Turntable, 13...
...Disc case, 13a...Through hole, 14...Disk, 14a...Hole, 12a...Engaging part, 12
b... shaft, 15... stator, 16... rotor,
17... Drive unit, 18... Elevating lever, 18a...
...Shaft, 19... Spring member, 20... Cam gear, 2
1...Cam, 21a...Switch drive unit, 22...
...Mode detection switch, 20a...Gear portion, 23
... Intermediate gear, 24 ... Drive motor, 25 ... Worm gear, 26 ... Engagement protrusion, 27 ... Discharge slider, 28 ... Spring member, 27a ... Switch drive section, 29 ... Position detection switch , 27b...
...Engaging portion, 30...First ejection lever, 30a...
...Engagement pin, 30b... Rotating shaft, 31... Spring member, 32... Second ejection lever, 32a... Rotating shaft, 33... Separation part, 34... Ejection part, 32b...
...Engagement part, 10a...Protrusion part, 35...Case accommodating part, 36...Guiding part, 37...Receiving pin, 38...
...Positioning pin, 13b...Positioning hole, 39...
...Holding spring, 40...Pickup, 41...Guide shaft, 42...Linear motor, 43...Speed detector, 42a, 43a...Yoke member, 42b, 4
3b...Permanent magnet, 42c, 43c...Bobbin,
42d, 43d... Drive coil, 44... Holding member, 44a... Rotating shaft, 44c... Locking part, 45
...Lock part, 13c...Recessed part, 45b...Switch drive part, 47...Lock detection switch, 48
...Case detection switch, 49... Erroneous erasure prevention lever, 49a... Rotation shaft, 50... Erroneous erasure prevention claw, 49b... Detection section, 49c... Drive section, 51
...Detection switch.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An optical disc record playback device in which an optical disc is installed in a disc case and is attached to and removed from a disc drive unit provided in a disc accommodating part, comprising: A regulating member provided in the disk accommodating portion and engaging with a part of the disk case accommodated therein to regulate the position of the disk case, and a light slope controlling the disk case accommodated in the disk accommodating portion. and a slope portion that releases the engagement between the regulating member and the disk case when the slope slides on the disk case, and after the position restriction of the disk case is released due to the movement of the slope portion, the disk a discharge member integrally provided with a discharge portion for discharging the case from the disk housing portion; and a discharge member that is connected to the disk case;
1. An optical disk record reproducing device comprising: an ejection drive mechanism that controls drive so that the inclined portion acts first, and then the ejection portion acts. (2) The ejection member is rotatably provided, the inclined portion is formed at one end, the ejected portion is formed at the other end, and the ejecting member is biased to rotate after the inclined portion acts. The optical disk record reproducing apparatus according to claim 1, characterized in that the ejecting section is configured to operate.