JP3104190B2 - Disc player - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc player, and more particularly to a disc player having a double-sided playing mechanism.

[Summary of the Invention] The present invention relates to a double-sided play type disc player, which comprises: The distance between the pickup and the disc is kept constant on both sides AB.

[Conventional technology]

2. Description of the Related Art In recent years, so-called double-sided performance players capable of continuously playing (playing) both sides of AB without taking out a disk have become widespread in disk players, particularly video disk players.

This double-sided player has a support mechanism for supporting the optical pickup movably in the disk radial direction corresponding to both surfaces AB of the disk placed on the turntable, and firstly corresponds to the surface of the disk A. After the optical pickup is moved along the support mechanism and the reproduction on the A side is performed, the optical pickup is then moved to the support mechanism corresponding to the disk B side to perform the reproduction on the B side. Be operated.

In a double-sided player configured as described above,
The distance between the optical pickup and the disk is
Although it is necessary to keep it constant with the side surface, it is difficult to accurately define this due to variations in the thickness of the disk and the relationship in the component configuration.

For this reason, conventionally, a height adjustment (height adjustment) mechanism is provided in the optical pickup itself, whereby the optical pickup is moved up and down to keep the distance to the disk constant.

[Problems to be solved by the invention]

As described above, conventionally, a special optical pickup having a height adjusting mechanism was required, which required a lot of cost, and was a major obstacle to reducing the price of the disc player.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a disc player which can ensure a constant distance of an optical pickup to a disc without having a height adjustment mechanism in the optical pickup itself, and solves the above problems. With the goal.

[Means for solving the problem]

In order to achieve the above object, a disc player according to the present invention includes a first support mechanism disposed on a lower surface of a disk and supporting an optical pickup so as to be movable in a radial direction of the disk, and a first support mechanism disposed on an upper surface of the disk. A second support mechanism that is connected to the first mechanism and supports the optical pickup so as to be movable in the radial direction of the disc; and a second support mechanism disposed outside the first and second support mechanisms. A reversing mechanism for rotating the optical pickup, which has been moved from one of the first and second support mechanisms by rotation, to the other support mechanism, and a first support mechanism side A skew adjustment mechanism for adjusting the skew of the first support mechanism and the second support mechanism by rotating the first and second support mechanisms about a support shaft, respectively; 2 Provided on the support mechanism side, in which the supporting shaft of the second supporting mechanism comprising and an adjusting mechanism for moving toward or away from the plane of the disc.

[Action]

In the disk player of the present invention having the above configuration, the optical axis of the optical pickup moved in the radial direction of the disk by the first or second support mechanism by the skew adjustment mechanism is set to be perpendicular to the surface of the disk. In addition to being adjustable, the adjustment mechanism moves the second support mechanism toward and away from the disk surface, so that the second support mechanism is supported by the second support mechanism. The distance between the optical pickup and the surface of the disk can be made equal to the distance between the optical pickup and the surface of the disk when supported by the first support mechanism.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, (1) is a chassis of a double-sided play type disc player, a spindle motor (2) is fixed to the bottom of the chassis (1), and a turntable (2) attached to a spindle shaft of the motor (2). 3) The disk D is placed on the top and driven to rotate. This disk D is AB
Signals are recorded on both sides. In this drawing, the lower surface is the A surface and the upper surface is the B surface.

Support mechanisms (5) and (6) for supporting the optical pickup (4) so as to be movable in the radial direction of the disk are respectively formed on both sides of the AB of the disk D.

Here, the lower support mechanism (5) corresponding to the surface A of the disk D is the first support mechanism, and the upper support mechanism (6) corresponding to the surface B of the disk D is the second support mechanism. Department.

These support mechanisms (5) and (6)
Support frame (7) arranged opposite to the A and B surfaces of
And (8) and guide shafts (9) and (10) fixed to the support frames (7) and (8) in the disk radial direction, and the optical pickup (4) is provided with the guide shaft (9) or (10), and is moved along by this by a predetermined driving means (for example, a linear motor).

An elevating / reversing mechanism (11) is provided between the two support mechanisms (5) and (6) and located outside the two support mechanisms (5) and (6) (outside the disk D). ing.

The lifting / reversing mechanism (11) has a lifting / lowering engagement pin (12) that is moved up and down between the guide shafts (9) and (10) of the support mechanisms (5) and (6). First, the guide shaft (9) of the lower support mechanism (5) corresponding to the side A of the disk D
When the optical pickup (4) is guided and moved along and the reproduction of the disk A surface is completed, the optical pickup (4)
Is moved beyond the outer end of the guide shaft (9), and is engaged with the lifting / lowering engagement pin (12) waiting to move to the lowered position.
Then, the elevating / reversing mechanism (11) operates to raise the optical pickup (4) integrally with the elevating / engaging pin (12) and to reverse its direction. Move inward and move to B of disk D
The guide shafts (1) of the upper support mechanism (6) corresponding to both sides
0), and the guide is moved along this to reproduce the surface of the disc B.

The disc player according to the present embodiment adjusts the skew (tilt adjustment) of the optical pickup (4) with respect to the disc D.
The structure can be performed.

That is, the support frame (7) of the lower support mechanism (5)
Is supported on the chassis (1) via a support shaft (13) at one end thereof, that is, on the inner peripheral end of the disk, so as to be able to turn (tilt) in the vertical direction. The ends are bent vertically upward.
On the other hand, the support frame (8) of the upper support mechanism (6) also supports the chassis (1) via the support shaft (14) at the inner peripheral end of the disk so as to be rotatable (tilted) in the vertical direction. The other end of the support frame (8) is engaged and connected to the upper end of a vertical portion (7a) of the lower support frame (7) via a connection shaft (8a).

A skew adjustment drive mechanism (15) is formed between the lower support mechanism (5) and the chassis (1), and the lower support mechanism is operated by the operation of the skew adjustment drive mechanism (15). The mechanism (5) rotates vertically (in the direction of the arrow a) with the support shaft (13) as a fulcrum, and at the same time, the upper support mechanism (5) connected to the lower support mechanism (5). 6) is also rotated in the vertical direction (the direction of arrow b) with the support shaft (14) as a fulcrum, whereby the optical pickup (4) supported by one of the upper and lower support mechanisms (5) or (6) is rotated. The skew adjustment for the disk D is performed,
That is, the optical pickup (4) is adjusted so that the optical axis is always perpendicular to the surface of the disk D. The operation of the skew adjustment drive mechanism (15) is controlled by a detection signal of a skew sensor (not shown) provided so as to move integrally with the optical pickup (4).

In the thus configured disc player of the present example, in order to ensure that the distance of the optical pickup (4) to the disc D is constant between the side A and the side B,
A rotation fulcrum of the upper support mechanism (6) corresponding to the side B;
That is, an adjustment mechanism (16) that can move the support shaft (14) in the direction of coming and going with respect to the surface of the disk D, that is, in the vertical direction (the direction of arrow c)
Is provided.

An example of the adjustment mechanism (16) will be described with reference to FIG. 2. First, a long hole (17) as a vertically long guide portion is formed in the chassis (1) side, and the upper support mechanism portion (6) is formed. The support shaft (14) as a pivot point of ()
Are movably inserted along. A swing arm (18) as an engagement member is pivotally attached to the chassis (1) at one end thereof by a pivot (19) so as to be freely rotatable (swing) up and down. The support shaft (14) moves up and down by 18). That is, an engagement recess (18a) is formed at the free end of the swing arm (18), and the support shaft (14) is engaged with the engagement recess (18a). ), The support shaft (14) is vertically moved integrally.

A window (20) is formed in the center of the swing arm (18), and an adjustment pin (21) is rotatable on the chassis (1) side so as to correspond to the window (20). Is pivoted to. The outer peripheral surface of the adjustment pin (21) is in contact with the upper and lower edges of the window (20), and the rotation axis (21a) is eccentric.

When the tip of a screwdriver is inserted into an operation groove (22) formed in the front end surface of the adjustment pin (21), for example, and rotated, the eccentric rotation of the adjustment pin (21) causes the window hole (20) to open. The upper and lower edges are pressed, so the swing arm (18)
Is pivoted about the pivot (19), and at the same time, the support shaft (14) is moved up and down in the direction in which the support shaft (14) comes into contact with and separates from the surface of the disk D (the direction of arrow c). Is varied.

The optical pickup (4) is supported by the upper support mechanism (6) by changing the height of the upper support mechanism (6) corresponding to the surface B of the disk D in this manner. In this state, the distance between the optical pickup (4) and the surface of the disk D is set such that the optical pickup (4) is supported by the lower supporting mechanism (5) corresponding to both surfaces A of the disk D. Can be adjusted to be the same as that of. The inclination of the upper support mechanism (6) caused by the vertical movement of the support shaft (14) is corrected by the operation of the skew adjustment mechanism described above.

As described above, in the disc player of the present embodiment, the optical pickup is formed by vertically moving the support shaft (14), which is the pivot of the upper support mechanism (6), toward and away from the surface of the disc D. (4) Since the distance from the disk D is kept constant, there is no need to use a special optical pickup with a height adjustment mechanism in the optical pickup itself as in the prior art, and it is used for a general single-sided play type disk player. A double-sided play type disc player can be commercialized using an ordinary optical pickup. Therefore, the production cost can be kept low, which can greatly contribute to the price reduction of the double-sided playing type disc player.

In the above embodiment, the support shaft (14) is manually operated.
An example of the adjusting mechanism (16) in which the distance between the optical pickup (14) and the disk D is adjusted by moving the optical pickup (14) up and down has been shown. The adjusting mechanism (16) is a manual mechanism as shown in FIG. The present invention is not limited to this, and it may be possible to automatically control using an electric mechanism.

Further, various changes and changes can be made in other units without being limited to the configuration shown in the present embodiment, and it goes without saying that the present embodiment does not specify the present invention.

〔The invention's effect〕

As is apparent from the above description, in the disk player of the present invention, the optical axis of the optical pickup moved in the radial direction of the disk by the skew adjustment mechanism in the first or second support mechanism is perpendicular to the surface of the disk. Not only can be adjusted so that the second support mechanism is moved toward and away from the surface of the disk by the adjustment mechanism, so that the second support mechanism is supported by the second support mechanism. The distance between the optical pickup in the state where the optical pickup is located and the surface of the disk is the same as the distance between the optical pickup and the surface of the disk when the state where the optical pickup is supported by the first support mechanism. it can.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a double-sided playing type disc player showing an embodiment of the present invention, and FIG. 2 is a configuration example of an adjusting mechanism thereof. In the figure, D is a disc, (4) is an optical pickup,
(5) is a support mechanism (first support mechanism), (6) is a support mechanism (second support mechanism), (11) is a lifting / reversing mechanism, and (13) is a support shaft (one of (14) is a support shaft (the other support shaft), (15) is a skew adjustment drive mechanism, (16) is an adjustment mechanism, (17) is a long hole (guide), and (18) is swinging. The moving arm (engaging member), (21) is an adjusting pin.

 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-113970 (JP, A) JP-A-63-87612 (JP, U)

Claims (2)

(57) [Claims] A first optical pickup disposed on a lower surface side of the disk for movably supporting the optical pickup in a radial direction of the disk;
And a second support mechanism disposed on the upper surface of the disk and connected to the first support mechanism and supporting the optical pickup so as to be movable in the radial direction of the disk. The optical pickup disposed outside the first and second support mechanisms and rotated by one of the first and second support mechanisms by rotation to move the optical pickup to the other side. A reversing mechanism for moving to the first supporting mechanism; and a first and a second mechanism provided on the first supporting mechanism.
A skew adjustment mechanism for adjusting the skew of the first support mechanism and the second support mechanism by rotating each of the support mechanisms about a support shaft; and a side of the second support mechanism. And an adjustment mechanism for moving the support shaft of the second support mechanism in the direction of coming and going with respect to the surface of the disk. 2. An adjusting mechanism according to claim 1, wherein said adjusting mechanism includes an engaging member which engages with a support shaft of said second support mechanism, an adjusting pin for swinging said engaging member, and a support shaft of said second support mechanism. 2. The disc player according to claim 1, further comprising: a guide portion for guiding the disc in a direction in which the disc contacts and separates from the surface of the disc.