JPH08297899A - Discoid recording medium recording and/or reproducing device - Google Patents

Abstract

PURPOSE: To stabilize chucking operation and recording and reproducing operation of an optical disk by providing a chucking arm to be oscillated in lifting and lowering positions as against a main surface of a chassis by a driving mechanism and a torsion spring between side walls of the chassis. CONSTITUTION: A loading and unloading roller for loading and unloading the optical disk 2 onto and from a turntable 10, a chucking arm 4 in an approximately U-shape to the main surface 3A of the chassis and the chucking driving mechanism 11 for oscillating the arm 4 into the lifting and lowering positions are provided in the chassis 3. Both end parts of two torsion springs 7A and 7B are fitted to the arm 4 and the side walls 3B and 3C of the chassis respectively. When the arm 4 is in the lifting position by the driving mechanism 11, specified elastic force is worked in the orthogonal direction to the main surface 3A on the springs 7A and 7B, and the optical disk 2 is so pressurized and held by the roller 6. Then, when the arm 4 is in the lowering position, small elastic force is worked in the same direction on the springs 7A and 7B to perform holding the disk with such pressurization.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a read-only optical recording medium (generally called a CD-ROM), a rewritable optical recording medium, and a rewritable magneto-optical medium by optical modulation or magnetic field modulation. The present invention relates to a recording and / or reproducing apparatus for a disc-shaped recording medium used for writing and / or reading an information signal to / from a disc-shaped recording medium such as a recording medium.

[0002]

2. Description of the Related Art Conventionally, a recording and / or reproducing apparatus such as a CD-ROM player uses a disc-shaped recording medium as an optical recording medium for information signals and records information signals recorded in a signal recording area of a magneto-optical disk. Or the information signal is recorded in the signal recording area. As a disk-shaped recording medium,
CD-ROMs, magneto-optical disks, etc. have been put to practical use.

Here, as an example, a reproducing apparatus for a CD-ROM (hereinafter referred to as an optical disk) will be described. A conventional optical disc reproducing apparatus generally includes a reproducing unit including an optical pickup, a moving mechanism unit that moves the reproducing unit with respect to a signal recording area of the optical disc, a disc driving unit that rotationally drives the optical disc, and a chuck that holds the optical disc. It is configured with a king part.

The reproducing section is equipped with an optical pickup,
It is provided at a position facing the signal recording area of the optical disc. The moving mechanism unit includes a guide shaft that movably supports the optical pickup and a moving motor that moves the optical pickup, and moves the optical pickup of the reproducing unit along the radial direction of the optical disc. The disk drive is
A spindle motor is provided, and this spindle motor drives the optical disc to rotate. The reproducing unit, the moving mechanism unit, and the disc driving unit are mounted on the chassis.

As shown in FIG. 6, the chucking portion provided in the optical disk reproducing apparatus 21 includes a chassis 23 and a chassis 23.
A turntable (not shown) on which an optical disc is placed,
A chucking arm 24, which has a chucking plate (not shown) for holding an optical disc and is swingably supported by a chassis 23, the chassis 23 and the chucking arm 2
The first coil spring 27A and the second coil spring 27B, both ends of which are attached to 4 and 4, respectively, temporarily hold an optical disk which is provided in parallel with the chucking arm 24 and which is inserted into and removed from the chucking arm 24. It comprises a holding member (not shown) and a chucking drive mechanism for moving the chucking arm 24 with respect to the turntable.

A main surface 23A of the chassis 23 is formed in a substantially rectangular plate shape, and rising side walls 23B and 23C facing both sides of the main surface 23A are provided, respectively. The turntable is formed in a disc shape and is provided on a spindle motor (not shown) of the disk drive unit. Then, the center portion of the optical disc is placed on the turntable.

The chucking arm 24 is formed into a substantially U-shaped cross section, and fulcrum holes 24A and 24B are formed at both ends thereof. In the chucking arm 24, fulcrums 28A and 28B are inserted into fulcrum holes 24A and 24B, respectively, and these fulcrums 28A and 28B are erected on rising side walls 23B and 23C of the chassis 23, respectively. Therefore, the chucking arm 24 is attached to the rising side walls 23B and 23C of the chassis 23 by the support shaft 28.
It is swingably supported via A and 28C.

The chucking arm 24 is provided with spring mounting portions 24C and 24D on both sides,
One ends of the first and second coil springs 27A and 27B are attached to the spring attachment portions 24C and 24D, respectively. Furthermore, this chucking arm 24 has
A chucking member (not shown) is provided across both sides.

In the optical disc reproducing apparatus 21 configured as described above, the optical disc is placed on the turntable when reproducing the information signal of the optical disc. Then, in the optical disk reproducing apparatus 21, the chucking arm 24 is located at a position (hereinafter, referred to as a raised position) separated from the main surface 23A of the chassis 23 and adjacent to the main surface 23A of the chassis 23 (hereinafter, referred to as a rising position). , The lower position).

The chucking arm 24 includes first and second chucking arms 24.
The first and second coil springs 27A and 27B are moved to the lowered position against the elastic force of the coil springs 27A and 27B.
A and 27B are elastically displaced.

Then, in the optical disk reproducing apparatus 21, the chucking arm 24 is moved to the lowered position, so that the chucking plate of the chucking arm 24 presses the optical disk placed on the turntable.
Therefore, the optical disc mounted on the turntable is held by the chucking plate of the chucking arm 24.

In the optical disk reproducing device 21, the disk drive section rotationally drives the optical disk held by the chucking plate of the chucking arm 24, and the optical pickup of the reproducing section reproduces the information signal of the optical disk.

[0013]

As described above, in the optical disk reproducing apparatus 21, the spring mounting portions 24C and 24D of the chucking arm 24 are attached to the main surface 23A of the chassis 23.
First and second coil springs 27A, 27 installed upright
One end of B is attached respectively.

Therefore, the optical disk reproducing device 21 is
As shown in FIGS. 7 and 8, when the chucking operation of the optical disc is performed, the first and second coil springs 27A and 27B are moved along with the lowering of the chucking arm 24.
Is compressed and elastically displaced. The elastic displacement of the first and second coil springs 27A and 27B is increased in proportion to the descending distance of the chucking arm 24, and the elastic force is increased.

Therefore, in the optical disk reproducing apparatus 21, the main surface 23A of the chassis 23 is pressed by the elastic force of the first and second coil springs 27A and 27B, and the entire chassis 23 is deformed such as warped or distorted. There was a problem that it did. Therefore, the optical disc reproducing device 21 causes the chassis 23 to be deformed,
There is a problem that a predetermined clearance cannot be secured for the chucked optical disc.

That is, the optical disk reproducing device 21 has a problem that the clearance between the optical disk and a member adjacent to the optical disk becomes small when the optical disk mounted on the turntable is tilted or vibrated. .

Therefore, the present invention provides a recording and / or reproducing apparatus for a disk-shaped recording medium, which can improve the stability of the chucking operation of the disk-shaped recording medium and stabilize the recording / reproducing operation. The purpose is to do.

[0018]

In order to achieve the above-mentioned object, a recording and / or reproducing apparatus for a disk-shaped recording medium according to the present invention comprises a chassis provided with rising sidewalls facing each other on both sides of a main surface. A turntable on which a disc-shaped recording medium is placed and which is rotationally driven by a drive motor arranged on the main surface of the chassis, and a chucking member which holds the disc-shaped recording medium placed on the turntable. A chucking arm that is swingably supported on the rising side wall of the chassis, and a rising position that separates the chucking arm from the main surface of the chassis and a lower position that adjoins the main surface of the chassis. Holding for temporarily holding the disk-shaped recording medium that is inserted into and removed from the chucking driving means that moves and the chucking arm that is parallel to the chucking arm Comprising wood and, a torsion spring having one end and the other end portion attached to the chucking arm to impart movement habit of direction of moving the raised position attached by chucking arm to the chassis. The torsion spring is provided such that the straight line connecting both ends is inclined with respect to the direction orthogonal to the main surface of the chassis.

[0019]

In the recording and / or reproducing apparatus for the disk-shaped recording medium according to the present invention constructed as described above, the torsion spring for imparting the movement habit to the chucking arm has a straight line connecting both ends of the torsion spring to the chassis. Is attached so as to be inclined with respect to the direction orthogonal to the main surface of.

Therefore, the chucking arm is provided with elasticity in a direction orthogonal to the main surface of the chassis, which is a component force of the elastic force of the torsion spring acting in the tilting direction, at a raised position spaced from the main surface of the chassis. Power is given. That is, the chucking arm has a habit of moving in a direction in which the chucking arm is moved to a raised position by an elastic force in a direction perpendicular to the main surface of the chassis, and is inserted into and removed from a gap facing the holding member. Hold the medium under pressure.

The chucking arm moves one end of the torsion spring as it moves to the lower position adjacent to the main surface of the chassis. For this reason, as the one end of the torsion spring is moved, the inclination angle formed by the straight line connecting the both ends with respect to the direction orthogonal to the main surface of the chassis is gradually increased.

Further, in the recording and / or reproducing apparatus for the disk-shaped recording medium, when the chucking arm is moved to the lower position adjacent to the main surface of the chassis, the elastic force of the torsion spring is tilted in the inclined direction. To work. Therefore, in the torsion spring, the elastic force in the direction orthogonal to the main surface of the chassis, which is the component of the elastic force acting in the tilt direction, becomes small.

That is, in the disk recording medium recording and / or reproducing apparatus, when the chucking arm is moved to the lowered position, the elastic force of the torsion spring acting in the direction orthogonal to the main surface of the chassis is reduced. There is.

[0024]

Embodiments of the recording and / or reproducing apparatus for a disk-shaped recording medium according to the present invention will be described below with reference to FIGS. An optical disc reproducing apparatus 1 according to an embodiment applied to a read-only optical recording medium (hereinafter, simply referred to as an optical disc) which is currently put into practical use as a disc-shaped recording medium will be described.

The optical disk reproducing apparatus 1 according to the embodiment is roughly composed of a reproducing section having an optical pickup 11, a moving mechanism section (not shown) for moving the reproducing section with respect to a signal recording area of the optical disk 2, and rotationally driving the optical disk 2. The disk drive unit and the chucking unit that holds the optical disk are provided.

Although not described in detail, the reproducing section includes an optical pickup 11 and is provided at a position facing the signal recording area of the optical disc 2. Then, this reproducing unit reads out and reproduces the information signal of the optical disc 2 by the optical pickup 11. The moving mechanism section includes a guide shaft for movably supporting the optical pickup and a moving motor for moving the optical pickup, and moves the optical pickup 11 of the reproducing section along the radial direction of the optical disc 2. The disk drive unit includes a spindle motor 9 and drives the optical disk 2 to rotate. The reproducing unit, the moving mechanism unit and the disc driving unit are connected to the chassis 3
Implemented in each.

The chucking portion, which constitutes the main part of the optical disc reproducing apparatus 1 of the embodiment, is supported by the chassis 3, the turntable 10 provided on the spindle motor 9 of the disc drive unit, and the chassis 3 so as to be swingable. The chucking arm 4 and the chucking plate 5 provided on the chucking arm 4 are provided.

Further, the optical disk reproducing apparatus 1 includes the first torsion spring 7A and the second torsion spring 7B, both ends of which are attached to the chassis 3 and the chucking arm 4, and the optical disk 2 with respect to the turntable 10. And a chucking drive mechanism 11 for moving the chucking arm 4 between an ascending position and a descending position.

The main surface 3A of the chassis 3 is formed in a substantially rectangular plate shape, and the rising side walls 3 facing both sides of the main surface 3A.
B and 3C are provided respectively. Turntable 1
Reference numeral 0 is formed in a disc shape and is supported by a rotary shaft 9A of a spindle motor 9 included in the disk drive unit.
Then, the central portion of the optical disc 2 is placed on the turntable 10.

The chucking arm 4 is formed in a substantially U-shaped cross section, and fulcrum holes 4A and 4B are formed at both ends thereof. The chucking arm 4 has fulcrum holes 4A, 4
The support shafts 8A and 8B are inserted through B.
A and 8B are erected inside the rising side walls 3B and 3C of the chassis 3, respectively. Therefore, both ends of the chucking arm 4 are swingably supported by the rising side walls 3B and 3C of the chassis 3 via the support shafts 8A and 8B.

The chucking plate 5 is formed in a substantially rectangular plate shape, and a chucking portion 5A is provided at a substantially central portion. Both ends of the chucking plate 5 are fixed over the chucking arm 4.

The first torsion spring 7A and the second torsion spring 7B have one end attached to the spring attachment projections 4C and 4D provided on the chucking arm 4, and the other end attached to the chassis 3. Rising side wall 3
They are attached to spring attachment protrusions 3E and 3F provided on B and 3C, respectively.

Then, these first torsion springs 7A
The second torsion spring 7B is, for example, with respect to a direction in which the straight line connecting both ends is orthogonal to the main surface 3A of the chassis 3 in a state where the chucking arm 4 is located at the raised position,
It is inclined by an inclination angle θ _{1 of} about 30 ° to 50 °.

Both ends of the disk inserting / removing roller 6 are rotatably supported on the rising side walls 3B, 3C of the chassis 3 via a supporting shaft (not shown), and are rotationally driven by a roller driving mechanism (not shown). . The disc insertion / removal roller 6 is provided with an elastic member such as rubber on the outer peripheral portion thereof to prevent the optical disc 2 from being inserted / removed from being damaged.

The facing distance between the disk inserting / removing roller 6 and the chucking arm 4 is determined by the turntable 1
Disk insertion / removal opening 1 for inserting / removing the optical disk 2 with respect to 0
A. Therefore, the disc insertion / removal roller 6 is rotationally driven by the roller driving mechanism to place the optical disc 2 inserted in the disc insertion / removal opening 1A on the turntable 10. Also, the disc insertion / removal roller 6
Is driven to rotate by the roller drive mechanism, and ejects the optical disc 2 placed on the turntable 10 to the disc insertion / ejection slot 1A.

Although a detailed description is omitted, the chucking drive mechanism 11 generally includes a drive motor (not shown) and a gear group (not shown) rotationally driven by the drive motor.
A cam gear 11A that is rotationally driven by this gear group,
One end of the cam gear 1 is connected to the chucking arm 4.
The drive pin 11B is driven by 1A. The chucking drive mechanism 11 moves the drive pin 11B through the gear group and the cam gear 11A when the drive motor is rotationally driven. The drive pin 11B is moved to move the chucking arm 4 to the raised position and the lowered position.

The operation of chucking the optical disk 2 in the optical disk reproducing apparatus 1 configured as described above,
The change in elastic force of the first and second torsion springs 7A and 7B acting in the direction orthogonal to the main surface 3A of the chassis 3 will be described with reference to FIGS.

First, in the optical disc reproducing apparatus 1, the optical disc 2 is inserted into the facing gap between the disc inserting / removing roller 6 and the chucking arm 4 which constitute the disc inserting / removing port 1A.

When the chucking arm 4 is located at the raised position, the optical disk reproducing apparatus 1 has the elastic force F _{1 of} the first and second torsion springs 7A and 7B as shown in FIG.
, Respectively, in a direction inclined by a predetermined inclination angle θ ₁ with respect to the direction orthogonal to the main surface 3A of the chassis 3.

The elastic force F ₁ of the first and second torsion springs 7A and 7B acting in the inclined direction is the chassis 3
Elastic force F _V1 acting in a direction orthogonal to the main surface 3A of the chassis and elastic force F _H1 acting in a direction parallel to the main surface 3A of the chassis 3.
It is the synthetic power with. Therefore, the first and second torsion springs 7A, 7B is configured to impart an elastic force F _V1 in the chucking arm 4 imparts the elastic force F _V1 in the main surface 3A of the chassis 3.

Therefore, the optical disc 2 inserted into the disc insertion / removal opening 1A has the first and second torsion springs 7
The chucking arm 4 to which the elastic forces F _V1 of A and 7B are applied is pressed and held by the disc insertion / removal roller 6. That is, the first and second torsion springs 7A, 7A
B, the elastic force F ₁ of the elastic force F _V1 sufficient to push the optical disc 2 to the disc insertion roller 6 is set.

The optical disk reproducing apparatus 1 drives the disk inserting / removing roller 6 to rotate so that the optical disk 2 inserted into the disk inserting / ejecting opening 1A is pulled inside the apparatus. Then, the optical disc 2 pulled in by the disc insertion / removal roller 6 is placed on the turntable 10 at the center.

In the optical disk reproducing apparatus 1, when the optical disk 2 is placed on the turntable 10, the chucking drive mechanism 11 is driven. In the optical disk reproducing device 1, the chuck gear 11 is driven to rotate the cam gear 11A via the gear group. The cam gear 11A is driven to rotate, whereby the drive pin 1
Move 1B. The optical disc reproducing apparatus 1 moves the drive pin 11B to move the drive pin 11B.
The chucking arm 4 connected to is moved.

That is, the chucking arm 4 uses the drive pins 11B as pivotal fulcrums on the support shafts 8A and 8B.
Moved to the lowered position. In the optical disk reproducing device 1, the chucking plate 5 is moved by moving the chucking arm 4 to the lowered position. In the optical disc reproducing apparatus 1, the chucking plate 5 is moved so that the chucking portion 5A is turned on.
The optical disc 2 placed on the top is pressed and held.

Then, in the optical disk reproducing apparatus 1, when the chucking arm 4 is located at the lowered position, the elastic force F _{2 of} the first and second torsion springs 7A and 7B is applied to the chassis 3 as shown in FIG. Is tilted by a tilt angle θ ₂ larger than the tilt angle θ ₁ with respect to the direction orthogonal to the main surface 3A.

First and second torsion springs 7A, 7B
The elastic force F ₂ is a combined force of the elastic force F _V2 acting in the direction orthogonal to the main surface 3A of the chassis 3 and the elastic force F _H2 acting in the direction parallel to the main surface 3A of the chassis 3. Therefore, these first and second torsion springs 7A, 7B
Applies an elastic force F _V2 smaller than the above-mentioned elastic force F _V1 in a direction orthogonal to the main surface 3A of the chassis 3.

That is, the elastic force exerted by the first and second torsion springs 7A, 7B in the direction orthogonal to the main surface 3A of the chassis 3 acts when the chucking arm 4 is in the lowered position. the elastic force F _2, the elastic force F ₁ acting in the chucking arm 4 is positioned in the raised position
Small compared to.

As described above, in the optical disc reproducing apparatus 1 of the embodiment, the straight line connecting both ends of the first and second torsion springs 7A and 7B attached to the chucking arm 4 and the chassis 3 is the chassis 3 by the direction perpendicular to the main surface 3A is inclined at angle theta _1, when the pressing and holding the optical disc 2 chucking arm 4 is moved to the lowered position, perpendicular to the main surface 3A of the chassis 3 The elastic force F _V2 in the moving direction is reduced.

Therefore, the optical disc reproducing apparatus 1 has the elastic force F applied in the direction orthogonal to the main surface 3A of the chassis 3.
_By reducing _V2 , adverse effects such as deformation of the main surface 3A of the chassis 3 are reduced. Therefore, in the optical disc reproducing apparatus 1, a predetermined clearance between the optical disc 2 and a member adjacent to the optical disc 2 is secured.

Therefore, the optical disk reproducing apparatus 1 can improve the stability of the chucking operation and can reduce the weight because the rigidity of the chassis 3 is unnecessary. Further, the optical disc reproducing apparatus 1 can stabilize the reproducing operation by surely chucking the optical disc 2.

In the optical disc reproducing apparatus 1, the straight line connecting both ends of the first and second torsion springs 7A and 7B with respect to the direction perpendicular to the main surface 3A of the chassis 3 has an inclination angle θ.
_By increasing ₁ as needed, when the chucking arm 4 is moved to the lowered position, the first and second torsion springs 7A and 7B cause the main surface 3 of the chassis 3 to move.
The elastic force F _V2 acting in the direction orthogonal to A can be further reduced.

Further, in the embodiment, the optical disk reproducing apparatus 1 applied to the read-only optical disk is shown, but of course, a rewritable optical recording medium or other magneto-optical material which can be rewritten by optical modulation or magnetic field modulation. It may be applied to a recording medium.

[0053]

As described above, according to the recording and / or reproducing apparatus for the disk-shaped recording medium of the present invention, the straight line connecting both ends is provided so as to be inclined with respect to the direction orthogonal to the main surface of the chassis. By providing a torsion spring, the deformation of the chassis that occurs when the optical disc mounted on the turntable is chucked is reduced, and
The weight of the chassis can be reduced. Therefore, the recording and / or reproducing apparatus for this disc-shaped recording medium can improve the stability of the chucking operation of the disc-shaped recording medium.

[Brief description of drawings]

FIG. 1 is a perspective view showing an optical disk reproducing device according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the optical disc reproducing apparatus.

FIG. 3 is a side view showing a main part of the optical disc reproducing apparatus.

FIG. 4 is a schematic cross-sectional view showing a main part of the optical disc reproducing apparatus.

FIG. 5 is a schematic cross-sectional view showing a main part of the optical disc reproducing apparatus.

FIG. 6 is a perspective view showing a conventional optical disc reproducing apparatus.

FIG. 7 is a schematic cross-sectional view showing a main part of a conventional optical disk reproducing device.

FIG. 8 is a schematic sectional view showing a main part of a conventional optical disc reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical disk reproducing device 2 Optical disk (disc-shaped recording medium) 3 Chassis 3A Main surface 3B, 3C Rising side wall 4 Chucking arm 5 Chucking plate (chucking member) 6 Disc insertion / removal roller (holding member) 7A, 7B Torsion spring 9 Spindle Motor (Drive Motor) 10 Turntable 11 Chucking Drive Mechanism (Chucking Drive Means)

Claims (2)

[Claims] 1. Recording and / or recording of information signals on a disk-shaped recording medium
Alternatively, in a recording and / or reproducing apparatus for a disc-shaped recording medium having a recording and / or reproducing means for reproducing, a chassis provided with rising sidewalls facing each other on both sides of a main surface and a disc-shaped recording medium are mounted. A turntable driven by a drive motor arranged on the main surface of the chassis, and a chucking member for holding a disk-shaped recording medium placed on the turntable. A chucking arm that is movably supported; a chucking drive unit that moves the chucking arm to an elevated position where it is separated from the main surface of the chassis and a lowered position that is adjacent to the main surface of the chassis; A holding member that is provided in parallel with the king arm and temporarily holds a disk-shaped recording medium that is inserted into and removed from a gap facing the chucking arm, and one end And a torsion spring attached to the chucking arm and the other end of which is attached to the chassis to provide a movement habit in a direction of moving the chucking arm to a raised position. The torsion spring is attached to the chucking arm and the chassis. A recording and / or reproducing apparatus for a disk-shaped recording medium, wherein a straight line connecting both ends is inclined with respect to a direction orthogonal to the main surface of the chassis. 2. A holding member, which is formed in a roller shape and whose both ends are rotatably supported on the rising side wall of the chassis, and a drive means for rotatably driving the holding member. The holding member is rotatably driven. The disc recording medium recording and / or reproducing apparatus according to claim 1, wherein the disc recording medium is inserted into and removed from the turntable.