JP2553657Y2 - Disk loading device - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, when two kinds of disks having different outer diameters are selectively inserted and mounted on a disk mounting portion of a disk tray, the center of the disk is centered on the disk mounting portion. The present invention relates to a disk loading device which automatically matches and is loaded at a position concentric with a turntable at a disk reproduction position.

[0002]

2. Description of the Related Art Conventionally, when a plurality of types of disks having different outer diameters are selectively inserted and mounted on a disk mounting portion of a disk tray, the center of the disk is automatically set to the center of the disk mounting portion. A disk loading device which is adapted to be loaded at a position concentric with the turntable at the disk reproducing position is known.

In such a conventional apparatus, a plurality of types of circular concave portions are provided concentrically on the surface of a disk mounting portion of a disk tray corresponding to the outer diameter of the disk, and the corresponding disks are placed in these circular concave portions. By fitting, the center of the disk automatically matches the center of the disk mounting portion. Further, as shown in Japanese Patent Application Laid-Open No. 2-58759, a disk is moved to a center position of a disk mounting portion by rotating two rotation arms provided opposite to each other and at a predetermined distance by a predetermined angle. Some have been proposed.

[0004]

In the former device described above, a plurality of types of circular concave portions must be provided concentrically on the surface of the disk tray of the disk tray in accordance with the outer diameter of the disk. Therefore, the disk tray must be thickened, which hinders a reduction in the thickness of the entire apparatus.

In addition, when a disk is inserted and mounted on the disk mounting portion, at least half of the disk tray must be pulled out of the outer case (apparatus frame), so that operability is poor.

Further, the latter conventional apparatus has a problem that a sensor for detecting the position of the disk is required.

The present invention has been made in view of the above circumstances. When two types of disks having different outer diameters are selectively inserted and mounted on a disk mounting portion of a disk tray, the center of the disk is as described above. The disc can be inserted into the disc loading section without thickening the disc tray while being able to be automatically fitted to the center of the disc loading section and loaded in the concentric position of the turntable at the disc playback position. It is an object of the present invention to provide a disk loading device in which the amount of pulling out the disk tray to the outside of the outer case is small and a sensor for detecting the position of the disk is not required.

[0008]

In order to achieve the above object, a disk loading device according to the present invention selects two types of disks having different outer diameters to be inserted radially at a disk insertion / removal position on a disk mounting portion. The disc tray is placed on the disc tray, and is moved in the disc insertion direction to transfer the disc onto a turntable at a disc playback position. The first contact portion and the second contact portion which are provided so that the distance from the center of the disc mounting portion can be displaced at the same time are substantially equal in the distance between the two contact portions from the center of the disc mounting portion. Are provided symmetrically with respect to the disc insertion direction, and the first contact portion and the second contact portion are attached to the disc tray by using a spring. Day The disc is urged so as to contact the outer peripheral edge of the disc inserted and mounted on the disc mounting portion, and the first contact portion and the second contact portion are maximally moved toward the center of the disc mounting portion. A stopper means for regulating the displacement position is provided.

[0009]

The small-diameter disk inserted and mounted on the disk mounting portion is provided symmetrically with respect to the left and right, and interlocks with each other on the near side and the back side in the disk inserting direction to displace while keeping the distance from the center of the disk mounting portion substantially equal. By contacting the outer peripheral edges of the left and right first and second contact portions which are displaced and biased toward the center, the disk is effectively aligned with the center of the disk mounting portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a disk reproducing apparatus provided with a disk loading device according to the present invention. In FIG. 1, reference numeral 1 denotes an apparatus frame (outer case), in which the inside is as shown in FIG. The apparatus board 2 and the tray guide 3 are disposed.

The device board 2 is provided with a turntable 6 which is rotated by a motor (not shown). A disk is loaded on the turntable 6 and rotates integrally with the turntable 6.

Further, a pickup unit 4 for reading information recorded on a disk is mounted on the device substrate 2. The pickup unit 4 is reciprocated in the radial direction of the disk indicated by arrows A and B by a motor 5 that is controlled to rotate forward and reverse.

On the other hand, the tray guide 3 disposed between the top plate 1a of the apparatus frame 1 and the apparatus board 2 has its rear end both sides rotatably attached to the rear end both sides of the apparatus board 2. I have. Guide grooves 3a on both sides of the tray guide 3,
3b, a disk tray 7 on which a disk is placed is provided.
Arrow C between the disk playback position and the disk insertion / removal position,
It is mounted so that it can reciprocate in the D direction. The disc tray 7 is provided on the device substrate 2 and reciprocates by engaging with a projection 51a of a slide member 51 that is reciprocated by selectively transmitting the force of a motor 5 for driving the pickup unit 4.

The motor for reciprocating the pickup unit 4 and the motor for reciprocating the disk tray 7 may be different from each other.

The disc tray 7 has an upper plate 7a and a lower plate 7b, and a gap is provided between the upper and lower plates 7a and 7b. On the upper surface of the lower surface plate 7b, two disks having different outer diameters to be radially inserted at the disk insertion / removal position are provided.
Discs 8 and 9 of different types (for example, outer diameters of 12 cm and 8 cm)
And a disk mounting portion 10 for mounting the information.
A position regulating portion 11 formed of an annular step is provided on the periphery of the disk mounting portion 10. This position regulating unit 11
Is in contact with the outer peripheral edge of a disk 8 having a larger outer diameter (hereinafter, referred to as a large-diameter disk) mounted on the disk mounting portion 10 so that the center of the disk mounting portion 10 of the large-diameter disk 8 The misalignment from O is regulated within a predetermined range.

As shown in FIG. 3, the upper plate 7a of the disk tray 7 exposes only approximately half of the disk mounting portion 10 on the front side so that the disk can be easily inserted and removed along the disk surface. The mounting part 10 is covered. This top plate 7
On the upper surface a, a pair of disk pressing mechanisms 12, 12 are provided symmetrically with respect to the disk insertion direction. These disc holding mechanisms 12, 12 have the same configuration which is symmetrical in the left-right direction.
A rotating arm (connection member) 14.

The first pivot arm 13 has a substantially middle portion pivotally attached to the upper surface of the upper plate 7a of the disc tray 7 by a shaft 15. One end 13a of the first rotating arm 13 is lowered by one step through the step 13b, and is inserted movably through an arc-shaped first long hole 16 centered on the shaft 15 of the upper surface plate 7a. , And extends below the upper surface plate 7a. At a predetermined position on the lower surface of the one end portion 13a of the first rotating arm 13, a first contact portion 17 made of a projection is provided so as to protrude. An engagement pin 18 is provided at a predetermined position on the upper surface of the other end 13 c of the first rotating arm 13.

The second rotating arm 14 has a substantially L-shape.
a is rotatably mounted on the upper surface of the upper surface a. One end 14a of the second rotating arm 14 is lowered by one step via a step 14b, and is inserted movably through a second arc-shaped long hole 20 centered on the shaft 19 of the upper surface plate 7a. , And extends below the upper surface plate 7a. At a predetermined position on the lower surface of one end of the second rotating arm 14, a second contact portion 21 made of a projection is provided so as to protrude. The other end 14c of the second rotating arm 14 is raised by one step via the step 14d. This other end 1
An engagement long hole 22 is formed at a predetermined position of 4c. The engagement pin 18 of the first rotating arm 13 is inserted into the engagement long hole 22.
Are movably engaged with each other so that the two rotating arms 13 and 14 rotate in opposite directions in conjunction with each other. The first and second contact portions 1 are linked by the rotation arms 13 and 14.
Numerals 7 and 21 are displaced between the near side and the far side of the disc tray 7 in the disc insertion direction while maintaining a relationship that the distance from the center O of the disc mounting portion 10 is substantially equal.

A torsion spring (spring means) 23 is provided between the first rotating arm 13 and the upper plate 7a of the disc tray 7.
Has been erected. One end of the torsion spring 23 is fixed to the upper surface of the upper plate 7a, and the other end is connected to the upper surface of a substantially intermediate portion of the first rotating arm 13. The torsion spring 23 contacts the first contact portion 17 and the second contact portion 21 with the outer peripheral edges of the large-diameter disk 8 and the small-diameter disk 9 inserted and mounted on the disk mounting portion 10 of the disk tray 7. The first rotation arm 13 is urged to rotate in the direction of contact.

One end (stopper means) 16 of the first elongated hole 16
a and the one end (stopper means) 20a of the second elongated hole 20 contact the first turning arm 13 and the second turning arm 14 so that the first contact portion 17 and the second contact portion 21 can be displaced. The shortest distance from the center O of the disc mounting portion 10 is restricted. This shortest distance is determined to be about the radius of the small-diameter disk 9 (radius-permissible range of misalignment).

As shown in FIG. 3, guide portions 24 and 25 formed of long holes corresponding to the large-diameter disk 8 and the small-diameter disk 9, respectively, are provided at symmetric positions of the top plate 3c of the tray guide 3 in the disk insertion direction. Is provided. These guide portions 24 and 25 selectively engage and guide an engaging portion 26 formed of a projection provided on the first rotating arm 13 so that the first contact portion 17 and the second The contact portion 21 is pressed against the disc tray 7 against the urging force of the torsion spring 23.
Is displaced toward the outside by an amount that allows the predetermined range of misalignment.

Further, a clamper member 28 is vertically movably fitted in a fitting hole 27 formed substantially in the center of the upper surface plate 7a of the disk tray 7. The clamper member 28 has a disk shape, and the outer peripheral edge 28a is supported on the peripheral upper surface 27a of the fitting hole 27 as shown in FIG. A projection 29 is protruded from substantially the center of the upper surface of the clamper member 28.
An annular engagement groove 30 is provided on the lower surface of the clamper member 28. The turntable 6 is provided in the engagement groove 30.
As shown in FIG. 7, an annular engaging projection 31 protruding from the upper surface of the first engaging member is detachably engaged. The outer peripheral surface from the substantially middle portion to the upper end side of the engaging projection 31 is a tapered surface 32 (center misalignment correcting means) whose diameter gradually decreases toward the upper end side.

The clamper member 28 is urged downward by a clamper spring 33 abutting on the projection 29. The clamper spring 33 has one end fixed to an upper surface of a pedestal 34 projecting from an upper surface of the top plate 3c of the tray guide 3 with a screw 35. When the turntable 6 is at the lowered position and is not clamped, the clamper spring 33 has a substantially middle portion in contact with the projection 29 of the clamper member 28 through a through hole 36 formed in the top plate 3c of the tray guide 3, and The end abuts on the upper surface of the top plate 3c of the tray guide 3 so as to be able to freely come and go.

The engaging projection 31 of the turntable 6
Engages in the engaging groove 30 of the clamper member 28 through the center hole 8a of the large-diameter disk 8 or the center hole 9a of the small-diameter disk 9, and pushes up the clamper member 28 against the urging force of the clamper spring 33. As a result, the large-diameter disk 8 or the small-diameter disk 9 is pressed against the upper surface of the turntable 6 and clamped. At this time, the large-diameter disk 8 or the small-diameter disk 9 which is placed on the disk mounting portion 10 of the disk tray 7 at the disk reproducing position and whose misalignment is within a predetermined range, is turned inside the center holes 8a, 9a. When the engaging projection 31 of No. 6 is inserted, the misalignment is corrected by the action of the tapered surface 32.

An insertion hole 38 through which the entire turntable 6 is inserted is formed at the center of the disk mounting portion 10 of the lower plate 7b of the disk tray 7. Further, a through hole 39 for avoiding collision between the clamper spring 33 and the top plate 1a when the clamper member 28 is lifted is formed at a substantially central portion of the top plate 1a of the apparatus frame 1.

Next, the operation will be described.

When the disk tray 7 is at the disk insertion / removal position, the amount of the disk tray 7 pulled out from the apparatus frame 1 is less than half. In this state, as shown in FIG. 4, when the large-diameter disk 8 is inserted in the radial direction onto the disk mounting portion 10 of the disk tray 7, the large-diameter disk 8
The outer peripheral edges of the first and second abutment portions 17 and 21 abut against the first and second abutment portions 17 and 21 so that the first and second abutment portions 17 and 21 move away from the center O of the disc mounting portion 10. 1,
The second rotating arms 13 and 14 rotate against the biasing force of the torsion spring 23. Thereafter, the outer peripheral edge of the large-diameter disk 8 comes into contact with the position regulating portion 11, whereby the misalignment of the large-diameter disk 8 from the center O of the disk mounting portion 10 is regulated within an allowable range.

When the disk tray 7 moves in the direction of arrow D and reaches the disk reproducing position after such a state, the large-diameter disk 8 is positioned above the turntable 6. With the movement of the disc tray 7 in the direction of arrow D, the engaging portions 26 of the first left and right rotating arms 13
The guide is engaged with guide portions 25 located on the left and right sides of the tray guide 3. When the disc tray 7 reaches the disc reproducing position, the engaging portion 26 is engaged with the lower end concave portion 25a of the guide portion 25, and the left and right first and second contact portions 1 are provided.
The discs 7 and 21 are displaced toward the outside of the disc tray 7 against the biasing force of the torsion spring 23 by an amount allowing the misalignment within the above-mentioned predetermined range, and are separated from the outer peripheral edge of the large-diameter disc 8. (See FIG. 4).

After such a state, the turntable 6 is raised, and the engaging projection 31 engages with the engaging groove 30 of the clamper member 28 through the center hole 8a of the large-diameter disk 8. . At this time, the misalignment of the large-diameter disk 8 within the predetermined range is corrected by the action of the tapered surface 32 of the engagement projection 31. At the same time, the large-diameter disk 8 is slightly separated from the disk mounting portion 10 and is held between the turntable 6 and the clamper member 28.

When the turntable 6 is further raised, the large-diameter disc 8 and the clamper member 28 are lifted against the urging force of the clamper spring 33, and the large-diameter disc 8 and the large-diameter The disc 8 is strongly pressed on the turntable 6. Thus, the large-diameter disk 8 is loaded at a concentric position on the turntable 6.

Thereafter, the turntable 6 is rotated, the large-diameter disk 8 and the clamper member 28 are rotated together with this, and the pickup unit 4 is moved in the radial direction of the large-diameter disk 8 to perform a reproducing operation.

On the other hand, as shown in FIG. 5, when the small-diameter disk 9 is inserted in the radial direction on the disk mounting portion 10 of the disk tray 7, the outer peripheral edge of the small-diameter disk 9 is moved to the first left and right sides. , And are pressed against the second contact portions 17 and 21. In this case, the small-diameter disk 9 contacts the first contact portion 17 and pushes the first rotating arm 13 right and left, and after the largest diameter portion passes through the first contact portion 17, the first contact portion 17 17
And is pushed into the inner part of the disc tray 7. When the outer peripheral edge of the small-diameter disc 9 comes into contact with the second contact portion 21, the small-diameter disc 9 is pushed back to the near side by the second contact portion 21. Then, in a state where the disk mounting portion 10 is in contact with the first and second abutting portions 17 and 21 which are displaced while maintaining a relation of being equidistant from the center O of the disk mounting portion 10 in conjunction with each other, To the center O of

That is, when the small-diameter disk 9 is eccentric to the near side, the small-diameter disk 9 contacts the first contact portion 17 and pushes the first contact portion 17 outward. Then, the second contact portion 21, which is displaced outward in conjunction with this, separates from the outer peripheral edge of the small-diameter disk 9, so that the small-diameter disk 9 is pushed by the first contact portion 17 and the disk mounting portion 10 Center O
Displaced to the side. On the other hand, when the small-diameter disk 9 is eccentric to the back side, the small-diameter disk 9 contacts the second contact portion 21 and pushes the second contact portion 21 outward. Then, the first contact portion 17 which is displaced outwardly in conjunction with this is moved.
Is separated from the outer peripheral edge of the small-diameter disk 9, the small-diameter disk 9 is pushed by the second contact portion 21 and
Is displaced to the center O side.

Due to the pressing action of the first and second contact portions 17 and 21 against such eccentricity of the disk 9, the small-diameter disk 9 is brought into contact with the first and second contact portions 17 and 21 respectively. It is aligned with the center O of the mounting section 10.

When the small-diameter disk 9 is eccentric to the left or right in the disk insertion direction, the first,
The second contact portions 17, 21 are displaced outward. At this time, the first and second abutting portions 17 and 21 on the opposite sides are to be displaced inward with the displacement of the small-diameter disk 9.
First and second long holes 16 and 20 of second rotating arms 13 and 14
Since the maximum displacement position is limited by the rotation restriction by one end of the disk, the force for pressing the small-diameter disk 9 is lost. As a result, the small-diameter disk 9 is pushed back toward the center O of the disk mounting portion 10 by receiving the pressing force from the first and second contact portions 17 and 21 on the side where the small-diameter disk 9 is eccentric.

The centering of the small-diameter disk 9 is effectively performed by the pushing action of the first and second contact portions 17 and 21 toward the inside of the small-diameter disk 9 in the disk insertion direction and the left-right direction as described above. Is made.

Thereafter, when the disk tray 7 moves in the direction of arrow D and reaches the disk reproduction position, the small-diameter disk 9 is positioned above the turntable 6. Then, as the disc tray 7 moves in the direction of the arrow D, the engaging portions 26 of the first left and right rotating arms 13 are engaged and guided by the guide portions 24 located inside the left and right sides of the tray guide 3.

When the disc tray 7 reaches the disc reproducing position, the engaging portion 26 is engaged with the lower end concave portion 24a of the guide portion 24, and the left and right first and second contact portions 17, 2 are provided.
1 is displaced toward the outside of the disc tray 7 by an amount allowing the misalignment in the predetermined range against the urging force of the torsion spring 23, and is separated from the outer peripheral edge of the small-diameter disc 9 (FIG. 5). reference).

After such a state, as in the case of the large-diameter disk 8 described above, the small-diameter disk 9 is loaded at a concentric position on the turntable 6 and a reproducing operation is performed.

As described above, according to the embodiment apparatus to which the present invention is applied, the first and second rotating arms 13 and 14 which are urged by the torsion spring 23 and are interlocked with each other. The second contact portions 17 and 21 are displaced while keeping the distance from the center O of the disc mounting portion 10 substantially equal, and the shortest displacement distance to the center O is regulated.
Accordingly, the periphery of the small-diameter disk 9 is formed by the first and second contact portions 17 and 21 of the pair of left and right first and second rotating arms 13 and 14.
The small-diameter disk 9 is accurately aligned with the center O of the disk mounting portion 10 (within an allowable misalignment range)
Will be aligned.

When the small-diameter disk 9 is eccentric, it is separated from one of the first and second abutting portions 17, 21. That is, when the small-diameter disk 9 is eccentric in the disk insertion direction, the first and second contact portions 17 and 21 are removed. When the eccentricity is left and right away from one of the abutting portions 17 and 21, the maximum amount of rotational displacement inward of the rotating arms 13 and 14 is regulated, so the first eccentric direction is opposite to the eccentric direction. Since the small-diameter disc 9 is separated from the first and second contact portions 17 and 21, the first and second contact portions 1 on the contacting side are separated from each other.
It is pushed inward at 7 and 21 and displaced. As a result, the center alignment of the small-diameter disk 9 with respect to the disk mounting portion 10 is effectively performed.

The configuration of the present invention is not limited to the above-described embodiment. For example, in the embodiment, the torsion spring 2 is disposed between the first rotating arm 13 and the disc tray 7.
3, the torsion spring 23 may be provided between the second rotating arm 14 and the torsion spring 23. In addition, the torsion spring 23 is connected to the pair of left and right first pivot arms 13, 1.
3 or between the second rotating arms 14, 14.

In the embodiment, the engaging portion 26 guided by the guide portions 24 and 25 is engaged with the lower concave portions 24a and 25a so as to regulate the position of the disc tray 7 at the disc reproducing position. However, when the position of the disc tray 7 is regulated by another means, the lower end recess 24 is required.
a and 25b are unnecessary. The point is that the guides 24 and 25 use the first and second contact portions 17 and 21 for the disks 8 and 9.
The first and second rotating arms 13 and 14 holding the discs are slightly displaced outward at the disc reproducing position to release the discs 8 and 9 from being pressed by the first and second contact portions 17 and 21. I just want it.

Further, the clamps of the discs 8 and 9 by the clamper member 28 may be magnet clamps or the like which are more often used than before. Also, regarding the stopper, the first or second rotating arm 13, 14
May be one that only regulates one of the rotation ranges. In short, the present invention can be variously modified without departing from the gist thereof.

[0046]

As described above, according to the disk loading device of the present invention, when two types of disks having different outer diameters are selectively inserted and mounted on the disk mounting portion of the disk tray, the center of the disk is set. Automatically aligns with the center of the disc loading section and can be loaded concentrically with the turntable at the disc playback position, but without increasing the thickness of the disc tray, and placing the disc on the disc loading section. This has the advantages that the amount of pulling out the disk tray to the outside of the outer case when inserting and placing the disk tray is small, and that a sensor for detecting the position of the disk is not required.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disc reproducing apparatus having a disc loading device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a tray guide and an apparatus substrate of the disc reproducing apparatus.

FIG. 3 is a partially cutaway plan view of the disc loading device of the present invention.

FIG. 4 is a plan view of a disc tray showing a state where the large-diameter disc is loaded in the apparatus.

FIG. 5 is a plan view of a disc tray showing a state where the small-diameter disc is loaded in the apparatus.

FIG. 6 is an explanatory diagram of an operation of a misalignment correction unit of the apparatus.

FIG. 7 is an explanatory diagram of the operation of the misalignment correction means of the apparatus.

[Explanation of symbols]

 O Center of disk mounting part 3 Tray guide 6 Turntable 7 Disk tray 8 Large diameter disk 9 Small diameter disk 10 Disk mounting part 11 Position control part 12 Disk pressing mechanism 13 First rotating arm (connection member) 14 Second rotation Arm (connecting member) 17 First contact part 21 Second contact part 23 Torsion spring (spring means) 24 Guide part 25 Guide part 26 Engaging part 37 Misalignment correcting means

Claims (1)

(57) [Scope of request for utility model registration] 1. A disc mounting portion for inserting two kinds of discs having different outer diameters inserted in a radial direction at a disc insertion / removal position.
(10) alternatively is placed on a disc tray (7) for transferring on a turntable in the disc playback position the disk moves to the disc inserting direction, the disc insertion of the disk tray of this A first abutment portion (17 ) and a second abutment portion (18 ), which are provided on the front side and the back side in the direction such that the distance from the center of the disk mounting portion is displaceable,
A pair of connecting members (13, 14 ) are connected by connecting members (13, 14 ) so that the distances between these two contact portions from the center of the disk mounting portion are substantially equal, and are provided symmetrically with respect to the disk inserting direction. A disc holding mechanism (12 ), and a spring means (23 ) for bringing the first contact portion and the second contact portion into contact with the outer peripheral edge of a disc inserted and mounted on the disc mounting portion of the disc tray. Stopper means (16a, 20a ) provided on the disc tray and for regulating the shortest distance of the first contact portion and the second contact portion from the center of the disc mounting portion; Engaging portions provided on the tray guide (3 ) supported by the disk press mechanism in accordance with the movement of the disk tray to the disk playback position, respectively. (26 ) Selective engagement plan And the first contact portion and the second contact portion at the disc reproducing position allow a predetermined range of misalignment toward the outside of the disc tray against the urging force of the spring means. A disk loading device comprising: a guide portion (24, 25 ) for displacing only.