JP2518069Y2 - Optical disc playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an optical disc record reproducing apparatus 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, a digital recording / reproducing system using a PCM (pulse code modulation) technique is becoming popular in order to achieve reproduction with as high fidelity as possible. This is called digital audio, and it has been established in principle that the audio characteristics do not depend on the characteristics of the recording medium and are significantly superior to those of the conventional analog method. . A recording medium intended for a disc (disc) is called a DAD system, and there are optical, electrostatic and mechanical reproducing systems as well.

For example, the optical disc record reproducing device by the CD (compact disc) system among the optical reproducing systems has a diameter
12mm, 1.2mm thick transparent disk with a metal film having pits corresponding to digital (PCM) data formed by CLV (constant linear velocity) method with a variable rotation speed of about 500 to 200 rpm. Rotate with. At the same time, this disc is linearly tracked to reproduce digitized data from the inner circumference side to the outer circumference side by an optical pickup incorporating a semiconductor laser and a light conversion element. This disc has a pitch of 1.
The size is 6 μm, and a huge amount of information capable of performing stereo reproduction for about 1 hour is recorded on one side thereof.

Then, in the above-mentioned optical disc record reproducing apparatus, what is required next is to simplify the handling of the disc so as to be compatible with various uses, while ensuring miniaturization with a simple structure without waste. That is.

As a concrete target of such a request, a user conventionally holds a disc directly in his / her hand and mounts it on a disc drive unit and stores it in a disc case. It is considered that the structure of the so-called cassette type that can be mounted simplifies the handling of the disc and protects the disc. In this case, it is not only necessary to store the disc in the disc case, but it is possible to meet various demands as an optical disc record reproducing device in association with each mechanical unit such as a pickup driving mechanism and a disc driving unit. There must be.

(Problems to be Solved by the Invention) This invention has been made in view of the above demands of the cassette type, and it is possible to achieve a reliable operation with a simple configuration and to simplify the handling of the disk. An object is to provide an optical disc record reproducing device.

[Configuration of Device] (Means and Actions for Solving Problems) In this device, an optical disk is housed in a disk case, and is attached / detached to / from a disk drive section provided corresponding to the case housing section. In the optical disc record reproducing apparatus, the first detecting means for detecting that the disc case is accommodated in the case accommodating portion, the urging means for generating an urging force, and the disc case for accommodating the case. A position where the disk case is completely housed in the case housing part, and a lock member for applying an urging force generated by the urging means to the disk case to lock the disk case, and a position where the disk case is completely housed in the case housing part. Second for detecting the lock state of the lock member for locking the disc case with
And a control means for controlling the mounting of the disc drive member of the disc drive part and the optical disc in the disc case in response to the detection of the first and second detection means. This enables highly accurate reproduction or recording of the disc housed in the disc case.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

1 and 2 show the front side and the back side of an optical disc record reproducing apparatus according to an embodiment of the present invention, in which 10 is a housing 11 (not shown in FIG. 2). It is the main chassis housed inside. This main chassis 10
A turntable 12 which constitutes a disk drive unit is disposed at a substantially central portion of the so as to be movable in the axial direction (directions of arrows A and B). As the turntable 12 moves in the direction of arrow A, the turntable 12 penetrates through the through hole 13a of the disc case 13 and is fitted into the clamper (not shown) through the hole 14a of the disc 14 so as to be able to drive the disc. A drive unit 17 including a stator 15 and a rotor 16 is connected to a shaft 12b on the back side of the main chassis 10 as shown in FIG. One end of an elevating lever 18 is engaged with the rotor 16 of the drive unit 17 . The middle part of the lifting lever 18 is the shaft 18a.
Is rotatably supported on the main chassis 10 via
A spring member 19 applies a spring force to the turntable 1 on the turntable 1a.
It is attached to urge 2 in the direction of arrow B. The other end of the lift lever 18 is engaged with a disc holding drive cam 21 formed on one surface of the cam gear 20.
A switch driving portion 21a is formed corresponding to the mode detection switch 22 arranged on the main chassis 10 (see FIG. 4). The cam gear 20 is rotatably supported by the main chassis 10, and a worm gear 25 fitted to a rotation shaft of a drive motor 24 is meshed with a gear portion 20a thereof via an intermediate gear 23. An engaging protrusion 26 for releasing the disk case is formed on the other surface of the cam gear 20 so as to correspond to the cam 21, and one end of the ejection slider 27 corresponds to the engaging protrusion 26. The discharge slider 27 is supported by the main chassis 10 so as to be movable in the directions of arrows C and D as shown in FIG.
A spring member 28 is attached to the intermediate portion so as to apply the spring force in the direction of arrow C. A switch drive unit 27a is formed in the middle of the discharge slider 27, and a position detection switch 29 provided on the main chassis 10 corresponds to the switch drive unit 27a. An engaging portion 27b is formed at the other end of the ejection slider 27, and an engaging pin 30a formed at one end of the first ejecting lever 30 corresponds to this engaging portion 27b. An intermediate portion of the first discharge lever 30 is rotatably supported by the main chassis 10 via a rotation shaft 30b, and a spring member 31 provides a spring force between the one end portion and the main chassis 10. 5 It is attached so as to be applied counterclockwise in FIG.
The middle portion of the second discharge lever 32 is rotatably supported on the other end of the first discharge lever 30 via a rotation shaft 32a. The second discharging lever 32 has a detaching portion 33, which is inclined downward in the discharging direction (direction of arrow C) at one end and faces the end portion of the disc case 13 (see FIG. 6), and at the other end portion. A discharging portion 34 is formed so as to face an end portion of the disc case 13. An engaging portion 32b is formed at one end of the second discharging lever 32 so as to correspond to the protruding portion 10a planted at a predetermined position of the main chassis 10.

Further, the main chassis 10 is provided with a case accommodating portion 35 corresponding to the case insertion hole 11a of the case 11 (see FIG. 1). Disc case guiding guides 36, 36 are formed on both sides of the case accommodating portion 35, and the disc case 13 is guided in the guides 36, 36 so that the disc case 13 can move in and out in the directions of arrows C and D. A pair of slide guide receiving pins 37, 37 are provided near the insertion hole on one end side of the turntable 10 on the lower surface of the case accommodating portion 35, and a pair of positioning pins are provided on the other end side of the main chassis 10. 38, 38 (only one side is shown in FIG. 1) are positioning holes 13b, 13 of the disk case 13.
It is provided corresponding to b. Positioning holding springs 39, 39 are arranged on the upper surfaces of the guide portions 36, 36 at predetermined intervals corresponding to the upper surface of the disk case.

Further, on the other part of the main chassis 10, for example, an optical pickup 40 for disk recording / reproducing is provided movably in the directions of arrows C and D via a guide shaft 41, and in its stopped state, transfer control is performed in the direction of arrow D most. To be done. A linear motor 42 is arranged at one end of the pickup 40, and a speed detector 43 is arranged at the other end. Similarly, in the niria motor 42 and the speed detector 43, for example, permanent magnets 42b and 43b are attached to the side walls of the yoke members 42a and 43a that are magnetized in the thickness direction, respectively. Each yoke member 42
a and 43a are drive coils 42d, in which bobbins 42c and 43c are wound.
43d is arranged so as to be movable in the directions of arrows C and D. The bobbins 42c and 43c of the drive coils 42d and 43d are the pickup 40
To be fixed. The niria motor 42 and the speed detector 43 are arranged on the main chassis 10 such that the magnetized surfaces of the yoke members 42a, 43a are substantially orthogonal to each other.

A holding member 44 for holding a pickup is rotatably arranged on the main chassis 10 via a rotation shaft 44a. The holding member 44 is provided with the receiving pins 37, 37 of the guide portions 36, 36.
7 is disposed in an intermediate portion between the positioning pins 38 and 38 with a spring member (not shown) biased in a counterclockwise direction in FIG.
44b is formed (see FIG. 7). An engaging portion 44c is formed at the other end of the holding member 44 so as to correspond to the pickup 40. The holding member 44 is rotationally controlled in association with the movement of the disk case 13, and in this state, the locking portion is held.
44c is separated from the pickup 40 located most in the direction of the arrow D (see (b) in the figure), and the side portion of the pickup 40 is locked in the extended state (see (a) in the figure).

Further, one end of a disk case locking member 45 is rotatably supported by the main chassis 10 in correspondence with the case accommodating portion 35. As shown in FIGS. 8 and 9, a spring member 46 is attached to the middle portion of the locking member 45 so as to apply the spring force thereof clockwise, and a locking portion 45a is provided at the other end. It is formed so as to correspond to the recess 13C formed in the disc case 13. A switch driving portion 45b is formed at the other end of the lock member 45 so as to correspond to the disk case lock detection lock detection switch 47 arranged in the main chassis 10. This locking member 45
When the disc case 13 is inserted into the case accommodating portion 35 to a predetermined position, the disc case 13 is urged to rotate counterclockwise in the figure against the spring force of the spring member 46, and the switch drive portion 45b. Are rotated in the same direction, and the lock detection switch 4
7 is once turned off (see FIGS. 9 (a) and 9 (b)), and then the lock portion 45a is locked in the recess of the disc case,
The switch drive unit 45b operates the lock detection switch 47 again to turn it on (see FIG. 9 (c)). Further, a case detection switch 48 for detecting a disc case is arranged on the main chassis 10 in correspondence with the case accommodating portion 35. The case detection switch 48 is turned on by the disc case 13 when the disc case 13 is accommodated in the case accommodating portion 35 (see FIG. 8C).

In addition, the main chassis 10 has an erasure prevention lever 49
The intermediate portion of is rotatably arranged via a rotation shaft 49a.
A detection portion 49b corresponding to an erroneous erasure prevention claw 50 formed on the disc case 13 is formed at one end of the erroneous erasure prevention lever 49, and a drive portion 49c is connected to the disc drive portion at a detection switch 51 at the other end. Corresponding to. The erroneous erasure prevention lever 49 is urged clockwise in FIG. 1 via a spring member (not shown). Then, this erasure prevention lever 49
When the disc case 13 is attached to the case accommodating portion 35,
The detection unit 49b is rotated by the spring force of a spring member (not shown) depending on the presence or absence of the erroneous erasure prevention claw 50 of the disc case 13 to turn off the detection switch 51 and stop the disc drive unit to stop the disc drive. Stop recording.

Now, the optical disc record reproducing apparatus configured as described above operates as follows.

That is, the disk case 13 in which the disk 14 is housed when the reproducing or recording operator is operated is inserted into the housing 11.
When inserted in the direction of arrow D from 11a, the disc case 13
Is guided by the holding springs 39, 39 and the receiving pins 37, 37 of the guide portions 36, 36 to move (see FIGS. 5A and 5B), the drive portion 44b of the holding member 44 at its tip portion. Is rotated clockwise in FIG. 7 against the spring force of the spring member (not shown) to separate the locking portion 44c from the pickup 40 (see FIG. 7). Then, when the disc case 13 is inserted to a predetermined position, the disc case 13 locks by rotating and biasing the lock member 45 against the spring force of the spring member 46 at time T _{1 as} shown in FIG. The detection switch 47 is turned off once (see FIG. 9 (b)), and then at time T ₂ , the disk case
The positioning pins 38, 38 of the main chassis 10 are engaged with the positioning holes 13b, 13b of 13 and the case detection switch 48 is turned on at the tip thereof. Next, at time T ₃ , the disk case 13 is locked with the lock portion 45a of the lock member 45 in the recess 13c, and the lock detection switch 47 is turned on (see FIG. 9 (c)). Then, the drive motor 24 is driven as shown in FIG. 5 (c), and the cam gear 20 is rotationally driven, and the cam 21 of the cam gear 20 causes the lift lever 18 to use the spring force of the spring member 19 in accordance with the rotation. The turntable 12 is moved in the direction of arrow A by rotating the turntable 12 against it. This allows the turntable
The engaging portion 12a of 12 passes through the through hole 13a of the disc case 13 and through the hole 14a of the disc 14 and the clamper (not shown).
Is drivably fitted to the shaft (see FIG. 3 (b)). At this time, in the cam gear 20, the switch driving portion 21a of the cam 21 turns on the mode detection switch 22 to stop the drive motor 24 (see FIG. 5 (d)). Where the above turntable
The drive unit 17 of 12 is driven and the pickup 40 is drive-controlled via the niria motor 42 and the speed detector 43 to perform disk reproduction or recording.

When recording the disc, the disc case 13
As described above, when the disk housing 13 is housed in the case housing portion 35 at time T ₃ , the presence or absence of the erroneous erasure prevention claw 50 of the disk case 13 is detected by the detection unit 49a of the erroneous erasure prevention lever 49. As a result, the erroneous erasure prevention lever 49 turns off the detection switch 51 in a state in which the erroneous erasure prevention claw 50 of the disk case 13 is not detected, and stops the drive of the disk drive unit to prevent erroneous erasure due to re-recording.

Next, when reproduction or recording of the disk is completed and a stop operating member (not shown) is operated, the drive of the niria motor 42 is stopped first, 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. 5 (e)). Then, as the cam gear 20 rotates, the elevating lever 18 is first inverted by the cam 21 to move and urge the turntable 12 in the direction of arrow B as shown in FIG. (1), and one end of the ejection slider 27 is engaged with the engaging protrusion 26. And
When the cam gear 20 is further driven to rotate, the engaging projection 26 urges the ejection slider 27 to move in the direction of arrow D against the spring force of the spring member 28 to turn off the position detection switch 29, and The engaging portion 27b of the ejection slider 27 is connected to the first ejection lever 3
The first ejection lever 30 is urged to rotate in the clockwise direction in the drawing by being brought into contact with the engagement pin 30a of 0. As a result, the first discharge lever 30 is rotationally biased together with the second discharge lever 32 as shown in FIGS. 6 (a), (b) and (c), and the second discharge lever 32 is The detaching portion 33 lifts one end of the disc case 13 to detach the positioning pins 38, 38 from the positioning holes 13b, 13b. Then, when the ejection slider 27 is further moved in the direction of the 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 rotated.
Is brought into contact with the protrusion 10a of the main chassis 10. As a result, when the ejection slider 27 is further moved in the direction of arrow D, the second ejection lever 32 is turned counterclockwise in the figure about the rotation shaft 32a with respect to the first ejection lever 30. The ejecting portion 34 ejects the disc case 13 to a predetermined position in the case accommodating portion 35 (see FIG. 5 (f)). 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 the original position by the spring force of the spring member 28. On the other hand, the first and second discharge levers 30 and 32 are respectively reversed by the spring force of the spring member 31 and returned to their original positions (Fig. 5 (g)).
reference). At the same time, the discharge slider 27 is
The position detection switch 29 is turned on by 27a, and the drive motor 2
Stop 4

Here, when the disk case 13 is pulled out in the direction of arrow C and separated from the case accommodating portion 35, the holding member 44 moves to the seventh position.
As shown in FIG. 3A, the spring force of the spring member (not shown) causes the spring member to rotate counterclockwise in the drawing to lock the locking portion 44c.
Thus, the side portion of the pickup 40 is regulated so as to be held in a state in which it is located at the outermost peripheral portion with respect to the turntable 12.

As described above, the optical disc record reproducing device detects the disc case 13 mounted in the case accommodating portion 35 by the case detection switch 48 and is locked at the disc drive position by the lock member 45 by the lock detecting portion switch 47. Is configured to drive the disk by controlling the drive motor 24 in the state of detecting, the safety is improved and the operation is ensured, and the disk is stored in the disk case 13 as much as possible. Highly accurate drive control of the disk 14 is possible.

It is needless to say that the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.

[Advantages of the Invention] As described in detail above, according to the present invention, an optical disc record reproducing apparatus is provided which has a simple structure, ensures reliable operation, and simplifies disc handling. can do.

[Brief description of drawings]

1 and 2 are configuration explanatory views showing an optical disc record reproducing apparatus according to an embodiment of the present invention, and FIGS. 3 and 4 are sectional views and perspective views showing a main part of FIG. FIG. 5 is a diagram showing the operating state of FIGS. 1 and 2, and FIG.
The figure which shows the principal part of the discharge mechanism of FIG. 7, FIG. 7 is FIG. 1 and 2
FIG. 8 is a view showing a pickup holding mechanism of the figure, FIGS. 8 and 9 are views showing a locking mechanism of the disc case, and FIG.
FIG. 7 is a timing chart diagram shown for explaining the operation of the figure. 10 …… Main chassis, 11 …… Case, 11a …… Insertion hole, 1
2 …… Turntable, 13 …… Disc case, 13a ……
Through hole, 14 ... Disc, 14a ... Hole, 12a ... Engagement part, 12
b …… axis, 15 …… stator, 16 …… rotor, 17 …… driving part, 18 …… elevating lever, 18a …… axis, 19 …… spring member, 2
0 …… Cam gear, 21 …… Cam, 21a …… Switch drive part,
22 …… Mode detection switch, 20a …… Gear part, 23 …… Intermediate gear, 24 …… Drive motor, 25 …… Worm gear, 26…
… Engaging protrusions, 27 …… Discharge slider, 28 …… Spring members,
27a …… Switch drive, 29 …… Position detection switch, 27b
...... Engagement part, 30 ...... First ejection lever, 30a ...... Engagement pin, 30b ...... Rotation shaft, 31 ...... Spring member, 32 ...... Second ejection lever, 32a ...... Rotation shaft , 33 ...... Release part, 34 ...... Ejection part, 32b ...... Engagement part, 10a ...... Projection part, 35 ...... Case storage part, 36 ...... Guide part, 37 ...... Receiving pin, 38 ...... Positioning pin , 13b …… positioning hole, 39 …… holding spring, 40 …… pickup, 41 …… guide shaft, 42 …… niria motor, 43 ……
Speed detector, 42a, 43a ...... yoke member, 42b, 43b ...... permanent magnet, 42c, 43c ...... bobbin, 42d, 43d ...... drive coil, 44
…… Holding member, 44a …… Rotary shaft, 44c …… Locking part, 45 ……
Lock part, 13c ... Recessed part, 45b ... Switch drive part, 47 ...
… Lock detection switch, 48 …… Case detection switch, 49
…… Erase prevention lever, 49a …… Rotation axis, 50 …… Erase prevention claw, 49b …… Detection part, 49c …… Drive part, 51 …… Detection switch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kaoru Morinaga 33, Shinisogo-cho, Isogo-ku, Yokohama-shi, Toshiba Sound Factory Co., Ltd. (56) Bibliography 60-183973 55247 (JP, U) Actual opening Sho 58-148766 (JP, U) Actual opening Sho 57-195663 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. An optical disc record reproducing apparatus in which an optical disc is accommodated in a disc case and is attached to or detached from a disc drive portion provided corresponding to the case accommodating portion. First detecting means for detecting that the disk case is housed in the case housing portion, biasing means for generating a biasing force, and a position of the biasing means at a position where the disk case is completely housed in the case housing portion. A lock member that applies a generated biasing force to the disc case and locks the disc case, and a locked state of the lock member that locks the disc case at the position where the disc case is completely accommodated in the case accommodating portion are detected. Second detecting means, and a disk drive member of the disk drive portion and the disk case in response to the detection of the first and second detecting means. Optical disc record reproducing apparatus for and control means for controlling the mounting of said optical disc, characterized by comprising a.