JP3367088B2 - MD-CD compatible player - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an MD-CD (mini disk-compact disk) compatible player applied to a magneto-optical recording / reproducing apparatus. 2. Description of the Related Art Mini discs (M
The configuration is different between D) and a compact disc (CD) not stored in the cartridge. For example, in the case of MD, the chucking surface and the recording surface do not match, and there is a step, whereas in the case of CD, the chucking surface and the recording surface match. Therefore, when the MD and the CD are set on the same turntable, the recording surface of the MD and the C
Since the position is different from the recording surface of D, it cannot be reproduced by the same player. Therefore, the MD has a player dedicated to the MD, C
A player dedicated to CD is prepared in D so that MD and CD can be set at the same time, and recording / reproduction of MD or CD becomes possible by switching operation of recording / reproduction operation. However, in order to prepare separate mechanisms for the MD and the CD, a larger installation space is required as compared with a recording / reproducing apparatus using only the MD or the CD. Had the problem of doing so. Also,
There is a problem that it is difficult to configure both mechanisms with only one of the recording and reproducing devices. The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to drive a turntable with a common motor and use an MD.
Another object of the present invention is to provide an MD-CD compatible player which can cope with any of CDs and saves space. SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an MD turntable fitted on a spindle and an MD magnet provided on a lower surface of the MD turntable through an attraction magnet. C that can be attached to and detached from the turntable
A compact disk mounted on the CD turntable by engaging with a turntable for D and a groove formed around the MD turntable and adsorbing to a clamp magnet provided on the upper surface of the MD turntable; CD clamper for clamping the
A compact disc is provided between the D turntable and a spring for abutting the CD turntable on the MD turntable, and a recording surface when the compact disc is set and a minidisc when the MD cartridge is set The recording surface of was made to be the same surface position. When no MD or CD is set, M
The turntable for D and the turntable for CD are integrated by an attraction magnet. Then, after placing the CD on the CD turntable for recording or reproducing the CD, the CD clamper is engaged with the groove formed on the upper surface of the MD turntable. The CD is set in a state where the CD is held between the CD turntable and the CD clamper. Also, in order to record or reproduce MD, M
Depending on the mounting force to set the D cartridge on the MD turntable and the weight of the MD cartridge,
The CD turntable integrated with the D turntable is separated from the MD turntable, and the MD is set on the MD turntable. Then, the recording surfaces of the set MD and CD are positioned at the same surface position. Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a plan view of an MD-CD compatible player according to the present invention, FIG. 2 is a cross-sectional view of an MD-CD compatible player with a compact disc (CD) set, and FIG. Sectional view of an MD-CD compatible player in a set state,
4 is an enlarged view of a main part of FIG. 2, and FIG. 5 is an enlarged view of a main part of FIG. As shown in FIGS. 1 to 3, an MD-CD compatible player 1 includes an MD turntable 4 on which a mini disc (MD) 3 stored in an MD cartridge 2 is mounted, and a compact disc (CD). A) CD turntable 6 for mounting 5), CD clamper 7 for holding CD5 between CD turntable 6, and spring 8 for abutting CD turntable 6 on MD turntable 4. It is configured. The MD turntable 4 is shown in FIGS.
As shown in FIG. 2, the spindle 12 is rotatably mounted on a chassis 10 via a spindle bearing 11 and is fitted to a tip end of a spindle 12. Also, the upper surface 4a of the MD turntable 4
A clamp magnet 14 is fixed to the magnetic plate 13 attached to the CD clamper 7 so as to be flush with the upper surface 4a.
An annular groove 16 is formed in which an annular protrusion 15 formed on the clamper 7 is engaged. Further, on the lower surface 4b of the MD turntable 4, an attraction magnet 17 for adsorbing the CD turntable 6 is fixed to be flush with the lower surface 4b. A pulley 18 is fitted on the rear end of the spindle 12, and a belt 19
And a spindle drive motor (not shown) is connected thereto. Note that a DD (direct drive) motor may be attached to the rear end of the spindle 12 via a coupling in order to directly drive the spindle 12 without using the pulley 18 or the belt 19. The CD turntable 6 comprises a concave portion 6a for accommodating the entire MD turntable 4 and an annular flat portion 6b on which the CD 5 is placed. A hole 6c opened at the center is loosely inserted into the spindle bearing 11. I have. Further, the CD turntable 6 is brought into contact with the lower surface 4b of the MD turntable 4 by a coiled spring 8 loosely inserted between the chassis 10 and the CD turntable 6 around the outer periphery of the spindle bearing 11. The turntable 4 is urged to be accommodated in the recess 6a. The CD clamper 7 is formed in a disk shape.
One end of a clamper support plate 20 is attached to the center of the upper surface 7a, the magnetic plate 13 is attached to the lower surface 7b, and an annular protrusion 15 is formed on the outer periphery of the magnetic plate 13. The other end of the clamper support plate 20 is attached to the chassis 10 via a shaft 21 so that the clamper support plate 20 is rotatable and the CD clamper 7 can be stopped at an arbitrary position. It should be noted that the annular projection 15 is formed in the opening 5 of the CD 5.
The outer diameter of the annular projection 15 is such that
It is slightly smaller than the inner diameter of the opening 5a of the CD5. In addition, the outer peripheral surface of the projection 15 is such that the tip of the projection 15 is C
D5 is formed in a tapered shape so that it can be easily inserted into the opening 5a. The operation of the MD-CD compatible player 1 configured as described above will be described. First, CD
The CD clamper 7 is opened (in a state separated from the MD turntable 4) to reproduce the CD 5, and the CD 5 is inserted into the CD.
On the turntable 6 for use. At this time, as shown in FIG. 4, the CD turntable 6 is brought into contact with the MD turntable 4 by the spring 8 and the magnetic force of the magnetic force is applied by the attractive force of the attracting magnet 17.
It is integrated with the D turntable 4. Next, the CD clamper 7 is turned to rotate the CD5.
Is brought into a closed state by contacting from above with the projection 15
In the opening 5a. At the same time, the protrusion 15 is fitted with the groove 16 of the MD turntable 4. Further, the magnetic plate 13 of the CD clamper 7 is attracted to the clamp magnet 14 of the MD turntable 4. Therefore, CD5
Is sandwiched between the flat portion 6b of the CD turntable 6 integrated with the MD turntable 4 and the CD clamper 7, and is positioned so that the position of the recording surface 5b is the same as the position of the flat portion 6b. You. On the other hand, the CD clamper 7 is opened to reproduce the MD3. At this time, as shown in FIG.
The CD turntable 6 is in contact with the MD turntable 4 by a spring 8 and is integrated with the MD turntable 4 by the attraction force of the attraction magnet 17. Next, the MD cartridge 2 is set so that the MD turntable 4 is inserted into the opening 2a formed on the lower surface of the MD cartridge 2. At this time,
The CD turntable 6 is placed under the MD cartridge 2 by overcoming the attraction force of the attraction magnet 17 acting between the MD turntable 4 and the CD turntable 6 and the elastic force of the spring 8 with respect to the CD turntable 6. The MD cartridge 2 is set on the MD turntable 4 with a mounting force that can be depressed with. Then, as shown in FIG. 5, the MD cartridge 2 has the elasticity of the spring 8,
Fit to MD turntable 4. And MD3
Depends on the shape of the MD turntable 4 to be fitted.
The recording surface 3a is positioned such that the position of the recording surface 3a is the same as the position of the recording surface 5b of the CD 5 set on the CD turntable 6. Note that the outer diameter of the CD turntable 6 is formed larger than the inner diameter of the opening 2a of the MD cartridge 2 so that the CD turntable 6 can be pushed down on the lower surface of the MD cartridge 2. The CD clamper 7, as shown in FIG.
The upper surface of the MD cartridge 2 may be pressed to be used as a mechanism for preventing the MD cartridge 2 from floating, or may be floated so that no external force is applied to the MD cartridge 2. Further, the clamp operation can be performed only when the CD 5 is set. When the MD cartridge 2 is taken out, the CD turntable 6, which has been pushed down by the weight of the MD cartridge 2, comes into contact with the MD turntable 4 by the elastic force of the spring 8, and the attracting magnet 17 Is integrated with the turntable 4 for MD. Here, the elastic force of the spring 8 is set so that the CD turntable 6 is attached to the lower surface 4b of the MD turntable 4.
It may be set to such an extent that it can be pushed up to the position where the attraction force of the attraction magnet 17 fixed to the device acts.
By doing so, no extra load is applied when the turntables 4 and 6 rotate. As described above, according to the present invention, a recording / reproducing apparatus capable of recording / reproducing both a mini-disc and a compact disc and saving space can be constructed with a simple structure. I can do it.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an MD-CD compatible player according to the present invention. FIG. 2 is a cross-sectional view of an MD-CD compatible player with a compact disc (CD) set. MD with disk (MD) set
FIG. 4 is an enlarged view of an essential part of FIG. 2 FIG. 5 is an enlarged view of an essential part of FIG. 3 [Description of reference numerals] 1. MD-CD compatible player, 2 MD cartridge, 3 mini Disk (MD), 3a ... MD recording surface, 4 ... MD turntable, 4a ... MD turntable upper surface, 4b ... MD turntable lower surface, 5
… Compact disc (CD), 5b… CD recording surface,
6 ... CD turntable, 7 ... CD clamper, 8 ...
Spring, 10: chassis, 12: spindle, 13
... magnetic plate, 14 ... magnet for clamping, 15 ... protrusion,
16: groove, 17: magnet for adsorption.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 25/04 101 G11B 17/028 601 G11B 17/028 611

Claims (1)

(57) Claims 1. An MD turntable fitted on a spindle and a CD detachable from the MD turntable via an attraction magnet provided on the lower surface of the MD turntable. And a compact disc mounted on the CD turntable by engaging with a groove formed around the MD turntable and adsorbing to a clamp magnet provided on the upper surface of the MD turntable. A CD clamper to be clamped; a spring compressed between a chassis and the CD turntable for abutting the CD turntable on the MD turntable; and a recording surface when the compact disc is set. And that the recording surface of the mini disc when the MD cartridge is set is the same surface position. MD-CD compatible player to.