JPH0668483A - Both-side access mechanism of optical disk drive - Google Patents

Abstract

PURPOSE:To provide the both-side access mechanism of the optical disk drive which can evade a collision between a cassette and an optical head at the time of cassette loading. CONSTITUTION:This access mechanism has a couple of sliders 14 and 15 which support optical heads 11 and 12 slidably along a radius direction of an optical disk, driving coils 18-21 which are fixed to the optical heads 11 and 12, magnetic circuits 22-25 which generate driving forces for sliding the optical heads 11 and 12 along the sliders 14 and 15 with the driving coils, and hinges 16 and 17 which support the sliders 14 and 15 so that they can slant and oscillate to the optical disk surfaces around their one-end sides. The spiders 14 and 15 can be rotated between a 1st rotation position for disk reproduction and a 2nd rotation position for the loading and unloading of a cassette 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reproducing apparatus, and more particularly to a double-sided access mechanism of an optical disk drive for reproducing both sides of an optical disk.

[0002]

2. Description of the Related Art Conventionally, in an optical disk drive for performing single-sided reproduction of an optical disk housed in a cassette,
As shown in FIG. 3, loading of the cassette is performed by moving the cassette 2 in which the optical disc D is housed in a fixed position where the optical head 1 is on standby in the horizontal and vertical directions with respect to the disc surface. When the loading is completed, the objective lens mounting portion 1a of the optical head 1 is inserted into the opening provided in the cassette 2, and the disc can be reproduced.

However, when considering a configuration in which two optical heads are fixedly arranged facing each other in order to reproduce both sides of an optical disk, the distance between the optical heads is smaller than the thickness of the cassette, that is, the optical heads are obstacles. As a result, the cassette cannot be transported to the target position.

[0004]

Thus, when an existing optical head access mechanism is used to construct a double-sided reproduction optical disk drive, the optical head becomes an obstacle and the cassette can be loaded to a target position. There was a problem that I could not do it.

The present invention is intended to solve such problems, and an object thereof is to provide a double-sided access mechanism for an optical disk drive which can avoid a collision between a cassette and an optical head during cassette loading / unloading. .

[0006]

In order to achieve the above-mentioned object, the double-sided access mechanism of the optical disk drive of the first invention has two optical heads for reproducing both sides of the optical disk housed in the cassette. In a double-sided access mechanism of an optical disk drive that is opposed to each other with a pair of sliders, a pair of sliders that respectively support the optical heads so as to be slidable along the radial direction of the optical disk, and fixed to the optical heads. A drive coil, a magnetic circuit that generates a drive force for slidingly moving each of the optical heads along the slider between the drive coil, and each slider on the optical disk surface with one end of each slider as an axis. A rotary support member that supports the tilting and swinging movement, and the sliders,
Through the rotation support member, there are provided means for rotating between a first rotation position during disk reproduction and a second rotation position during loading / unloading of the cassette.

In order to achieve the above-mentioned object, the double-sided access mechanism of the optical disk drive of the second invention is designed to perform double-sided reproduction of the optical disk stored in the cassette.
In a double-sided access mechanism of an optical disc drive in which two optical heads are arranged to face each other with the optical disc interposed therebetween,
A pair of sliders that respectively support the optical heads so as to be slidable along the radial direction of the optical disk, drive coils fixed to the optical heads, and the optical heads slide along the sliders. A magnetic circuit that generates a driving force for moving between the drive coil and the drive coil; a rotation support member that supports one of the sliders so as to be tiltable and swingable with respect to the optical disk surface about one end thereof as an axis; And a means for rotating the slider between a first rotation position during disk reproduction and a second rotation position during loading / unloading of the cassette via a rotation support member.

[0008]

According to the first aspect of the invention, each slider is supported so that it can be tilted and swung with respect to the optical disk surface with its one end serving as an axis, and at the time of disk reproduction, it reaches the first rotational position where the distance between the optical heads is narrowed. Each slider is tilted, and when loading / unloading the cassette, each slider is tilted to the second rotation position where the distance between the optical heads is widened.

According to the second aspect of the invention, one slider is supported so that one end thereof can be tilted and oscillated with respect to the optical disk surface, and at the time of disk reproduction, the first rotational position where the distance between the optical heads is narrowed. The slider is tilted up to, and when loading / unloading the cassette, the slider is tilted to the second rotation position where the distance between the optical heads is widened. Therefore, according to these inventions, it is possible to avoid a collision between the cassette and the optical head at the time of loading / unloading the cassette.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing the configuration of a double-sided access mechanism of an optical disc drive according to an embodiment of the present invention.

In the figure, reference numerals 11 and 12 respectively denote two optical heads which are vertically opposed to each other with the optical disc interposed therebetween in order to reproduce both sides of the optical disc contained in the cassette 13. The optical heads 11 and 12 are supported by a pair of sliders 14 and 15, respectively, and are reciprocated along the sliders 14 and 15 in the radial direction of the optical disk. Further, one ends of the sliders 14 and 15 are supported by the housing via hinges 16 and 17, respectively, and the sliders 14 and 15 are rotatable about the hinges 16 and 17, that is, tilted and oscillated with respect to the optical disk surface. It is free. The sliders 14 and 15 are connected to the loading mechanism and the unloading mechanism via a connecting mechanism (not shown) so as to rotate in association with the loading operation and the unloading operation of the cassette 13.

Two drive coils 18, 19, 20 and 21 are fixed to the optical heads 11 and 12, respectively. Each drive coil 18, 19, 20, 21 has a porcelain circuit 22, 23, 2 fixed to the housing, respectively.
4, 25 center yokes 26, 27, 28, 29 are inserted. In addition, each drive coil 18, 19, 2
The vertical dimension of the center yoke insertion opening at 0 and 21 is
The optical head 11 accompanying the tilt swing of the sliders 14 and 15,
In consideration of the amount of vertical movement of 12, the vertical dimension of the cross section of the center yoke is larger.

Next, the operation of this double-sided access mechanism will be described with reference to FIG. When cassette loading is started from the state of FIG. 2A, as shown in FIG. 2B, the sliders 14 and 15 that support the optical heads 11 and 12 are linked to the hinges 16 and 17, respectively. It rotates in the directions of arrows A and A ′, respectively, centering on one end portion supported by.

While the cassette 13 is being conveyed in the horizontal direction, that is, in the direction of arrow B, the sliders 14 and 15 reach the limit of rotation, whereby the path of the cassette 13 is opened. After that, when the cassette 13 reaches the disc reproducible position shown in FIG. 2C and the loading is completed, as shown in FIG. 2D, the sliders 14 and 15 move in the opposite direction, that is, the arrows C and C. Rotate in the 'direction,
It returns to the state of (a). As a result, the objective lens mounting portions 11a and 12a of the optical heads 11 and 12 are inserted into the openings (not shown) provided on both sides of the cassette 13, respectively, so that both sides of the disc can be reproduced.

Further, when the cassette 13 is unloaded (discharged), the sliders 14 and 15 for supporting the optical heads 11 and 12 are similarly rotated.

That is, immediately before the unloading operation is actually started, the sliders 14 and 15 move to the cassette 1
3 is the direction of opening the retreat, that is, the arrow A in FIG.
It rotates in the A'direction. After this, when the cassette 13 is almost completely discharged, the sliders 14 and 15 are closed in the direction in which the cassette 13 is retracted, that is, arrows C and C '.
After the cassette 13 is completely ejected, the sliders 14 and 15 are returned to their original states.

Thus, according to the double-sided access mechanism of the optical disk drive of this embodiment, even if the two optical heads 11 and 12 for double-sided reproduction are arranged to face each other with the optical disk in between, collision with the optical heads 11 and 12 is prevented. The loading / unloading operation of the cassette 13 can be performed without inviting.

In this embodiment, each optical head 11,
12 is configured to move up and down together, the cassette 13
By adding not only horizontal movement but also vertical movement, that is, movement in the thickness direction of the optical disk to the loading / unloading operation of 1, it is possible to move only one optical head up and down.

[0019]

As described above, according to the optical disk drive of the present invention, even if the optical heads for double-sided reproduction are arranged to face each other with the optical disk in between, the cassette loading / loading can be performed without causing a collision with the optical head. An unloading operation can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of a double-sided access mechanism of an optical disc drive according to an embodiment of the present invention.

FIG. 2 is a diagram showing an operation of the double-sided access mechanism shown in FIG. 1 when loading a cassette.

FIG. 3 is a diagram showing how a cassette is loaded in a conventional single-sided reproduction optical disk drive.

[Explanation of reference numerals] 11, 12 ... Optical head, 13 ... Cassette, 14, 15
... Slider, 16,17 ... Hinge, 18, 19, 20,
21 ... Drive coil, 22, 23, 24, 25 ... Porcelain circuit, 26, 27, 28, 29 ... Center yoke.

Claims (2)

[Claims] 1. A double-sided access mechanism of an optical disc drive, wherein two optical heads are arranged to face each other with the optical disc sandwiched therebetween in order to perform double-sided reproduction of the optical disc housed in a cassette. A pair of sliders, each of which is slidably supported along a direction, a drive coil fixed to each of the optical heads, and a driving force for slidingly moving each of the optical heads along the slider. A magnetic circuit generated between the coil and a coil; a rotation support member that supports each slider so as to be tiltable and swingable with respect to the optical disc surface with one end of each slider as an axis; and each slider through the rotation support member. The first rotation position and the loading / unloading of the cassette during disk reproduction. Sided access mechanism of an optical disc drive characterized by comprising a means for rotating each between the second rotational position in the. 2. A double-sided access mechanism of an optical disc drive, wherein two optical heads are arranged to face each other with the optical disc sandwiched therebetween in order to perform double-sided reproduction of the optical disc housed in a cassette. A pair of sliders, each of which is slidably supported along a direction, a drive coil fixed to each of the optical heads, and a driving force for slidingly moving each of the optical heads along the slider. A magnetic circuit generated between the coil and a coil; a rotation support member that supports one of the sliders so as to be tiltable and swingable with respect to the optical disk surface with one end thereof as an axis; and the one slider, the rotation support member. Through the first rotation position and the loading / unloading of the cassette. Sided access mechanism of an optical disc drive characterized by comprising means for pivoting between a second rotational position when.