JP2003263847A - Pickup feeding device, and recording and/or reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly feed an optical pickup in the radius direction of an optical disk by suppressing the occurrence of in deflection in a guide shaft. <P>SOLUTION: A pickup feed mechanism 59 which feeds the optical pickup 56 recording and reproducing signals to and from the optical disk in the radius direction of the optical disk 3 has guide shafts 61 and 62 which support the optical pickup 56 movably in the radius direction of the optical disk 3, and a base 16 where both end parts of the guide shafts 61 and 62 are supported is provided with positioning projection parts 66 and 67 which position the guide shafts 61 and 62 and a fixing screw 68 for fixing the guide shafts 61 and 62 positioned at the positioning projection parts 66 and 67 successively on a straight line crossing the guide shafts 61 and 62 almost at right angles across the guide shafts 61 and 62. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to recording and / or recording a signal on an optical disk such as an optical disk or a magneto-optical disk.
Also, the present invention relates to a pickup feeding device that feeds an optical pickup that performs reproduction in a radial direction of an optical disc, and a recording and / or reproducing device that includes such a pickup feeding mechanism.

[0002]

2. Description of the Related Art For example, a disc reproducing apparatus for reproducing an information signal from an optical disc drives a disc rotation drive mechanism for rotating the optical disc and an information signal for the optical disc rotationally driven by the disc rotation drive mechanism. An optical pickup for reproduction and a pickup feed mechanism for feeding the optical pickup in the radial direction of the optical disc are provided, and these are supported by the base of the apparatus body.

The disk rotation driving mechanism has a disk table integrally attached to the rotation shaft of a spindle motor, and the optical disk mounted on this disk table is rotationally driven by the spindle motor. The optical pickup is an optical system in which a light beam emitted from a light source is condensed by an objective lens and applied to a signal recording surface of an optical disc, and a returning light beam reflected from the signal recording surface of the optical disc is detected by a photodetector. And a biaxial actuator that displaces and drives the objective lens in the focusing direction and the tracking direction based on the detection signal from the optical disc detected by the photodetector, and reads the information signal recorded on the optical disc. At the same time, focusing control and tracking control of the objective lens with respect to the optical disk are performed. The pickup feed mechanism includes a feed base on which an optical pickup is mounted, a main shaft and a sub shaft that are guide shafts that movably support the feed base in the radial direction of the optical disk, a rack member provided on the feed base, It has a gear group including gears and feed screws that are meshed with the rack member, and a drive motor that rotationally drives the gear group and displaces the rack member in the direction along the guide shaft. The pickup feed mechanism moves the optical pickup in the radial direction of the optical disc while displacing and driving the feed base in the direction along the guide axis together with the rack member.

[0004]

By the way, in the above-mentioned disk reproducing apparatus, when the main shaft or the auxiliary shaft as the guide shaft is bent, it becomes very difficult to cope with the high density recording / reproducing system.

Specifically, in the above-mentioned pickup feed mechanism, since the optical pickup mounted on the feed base is fed in the radial direction of the optical disk along the main shaft and the sub shaft, the guide shafts are bent. in case of,
The so-called skew is caused by the tilt of the optical pickup or the change in the distance between the optical pickup and the optical disc between the inner and outer circumferences of the optical disc.
(Skew) and R-Dependece (R-Dependece) will deteriorate accuracy.

In this case, in a mechanical deck system having a margin such as a skew margin, it is possible to allow such deterioration of accuracy, but in a high density magneto-optical recording system, for example, a slight bending occurs in the guide shaft. Even just doing this will greatly affect the overall system. Therefore, in order to support such a high density recording / reproducing system, it is extremely important that the guide shaft does not bend.

Therefore, the present invention has been proposed in view of such conventional circumstances, and suppresses the occurrence of bending of the guide shaft, and appropriately feeds the optical pickup in the radial direction of the optical disc. It is an object of the present invention to provide a pickup feeding device capable of performing the above.

Further, the present invention provides a recording and / or reproducing apparatus capable of appropriately recording and / or reproducing a signal on an optical disc by providing such a pickup feeding mechanism. To aim.

[0009]

A pickup feeding device according to the present invention records and / or records signals on an optical disc.
Alternatively, a base for supporting an optical pickup for reproduction in a radial direction of the optical disc, having a guide shaft for movably supporting the optical pickup in the radial direction of the optical disc, and supporting both ends of the guide shaft. A positioning protrusion for positioning the guide shaft and a fixing screw for fixing the guide shaft positioned on the positioning protrusion are provided side by side on a straight line substantially orthogonal to the guide shaft with the guide shaft interposed therebetween. It is characterized by that.

As described above, in the pickup feeding device according to the present invention, since the positioning projection and the fixing screw are provided side by side on a straight line substantially orthogonal to the guide shaft with the guide shaft interposed therebetween, It is possible to appropriately position and fix the guide shaft on the base while suppressing the occurrence of bending of the guide shaft.

Further, the pickup feeding device according to the present invention feeds an optical pickup for recording and / or reproducing a signal to and from the optical disc in the radial direction of the optical disc, and operates the optical pickup. The base has a guide shaft that is movably supported in the radial direction, and both ends of the guide shaft are supported on a base. A positioning protrusion that positions the guide shaft and a fixing that fixes the guide shaft positioned on the positioning protrusion are fixed. The present invention is characterized in that a screw and an engaging projection that engages with a groove formed around the axis of the guide shaft are provided.

As described above, in the pickup feeding device according to the present invention, since the groove formed around the guide shaft and the engaging projection provided on the base are engaged, the positioning projection is formed. The guide shaft can be prevented from moving in the axial direction when the and the fixing screw positionally fix the guide shaft to the base.

Further, the recording and / or reproducing apparatus according to the present invention includes a disk rotation driving mechanism for rotationally driving an optical disk, and recording and / or reproducing of a signal for an optical disk rotationally driven by the disk rotation driving mechanism. And an optical pickup for moving the optical pickup in the radial direction of the optical disc, and a base for supporting the disc rotation drive mechanism and the pickup feed mechanism. The base has a guide shaft that is movably supported in the radial direction, and both ends of the guide shaft are supported on a base. A positioning protrusion that positions the guide shaft and a fixing that fixes the guide shaft positioned on the positioning protrusion are fixed. The screws and the guide shaft are placed side by side on a straight line substantially orthogonal to the guide shaft. The one in which the features.

As described above, in the recording and / or reproducing apparatus according to the present invention, in the pickup feed mechanism, the positioning protrusion and the fixing screw are provided side by side on a straight line substantially orthogonal to the guide shaft with the guide shaft interposed therebetween. Therefore, the guide shaft can be appropriately positioned and fixed to the base while suppressing the occurrence of bending of the guide shaft.

Further, the recording and / or reproducing apparatus according to the present invention records and / or reproduces a signal on / from a disk rotation driving mechanism for rotationally driving an optical disk and an optical disk rotationally driven by the disk rotation driving mechanism. And an optical pickup for moving the optical pickup in the radial direction of the optical disc, and a base for supporting the disc rotation drive mechanism and the pickup feed mechanism. The base has a guide shaft that is movably supported in the radial direction, and both ends of the guide shaft are supported on a base. A positioning protrusion that positions the guide shaft and a fixing that fixes the guide shaft positioned on the positioning protrusion are fixed. With screws,
The present invention is characterized in that an engaging protrusion that engages with a groove formed around the axis of the guide shaft is provided.

As described above, in the recording and / or reproducing apparatus according to the present invention, in the pickup feeding mechanism, the groove portion formed around the guide shaft and the engaging protrusion provided on the base are engaged with each other. Therefore, when the positioning protrusion and the fixing screw positionally fix the guide shaft to the base,
It is possible to prevent the guide shaft from moving in the axial direction.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An example in which the present invention is applied to a disk recording / reproducing apparatus for recording / reproducing information signals on / from a magneto-optical disk rotatably housed in a disk cartridge will be described with reference to the drawings. The details will be described.

The disc recording / reproducing apparatus 1 shown in FIG. 1 is portable and has a disc cartridge 2 as a recording medium.
Are using.

In the disc cartridge 2 used in the disc recording / reproducing apparatus 1, a magneto-optical disc 3 of about 64 mm is rotated on a cartridge body 2c formed by abutting a pair of upper half 2a and lower half 2b. It is stored as much as possible.

At the center of the magneto-optical disc 3, there is provided a chucking plate 4 which is mounted on a disc table 54 of the disc recording / reproducing apparatus 1 described later. The chucking plate 4 is made of a magnetic material such as metal so as to be magnetically attracted by the magnet 55 provided on the disk table 54. That is, the magneto-optical disk 3 is mounted on the disk table 54 by the chucking plate 4 being magnetically attracted by the magnet 55.

In the cartridge body 2c which rotatably accommodates the magneto-optical disk 3, the cartridge body 2c is located on the surfaces of the upper half 2a and the lower half 2b, which face each other, in the substantially central position on the front side.
A recording / reproducing opening 5 is formed so that a part of the signal recording area of the magneto-optical disk 3 is exposed to the outside over the inner and outer circumferences. Of these, the opening 5 on the upper half 2a side is for allowing the magnetic head 77a for applying a magnetic field to the magneto-optical disk 3 to enter the inside of the cartridge body 2c, and the opening on the lower half 2b side (see FIG. (Not shown) is for exposing the optical pickup 56 to the magneto-optical disk 3.

A shutter member 6 for opening / closing the recording / reproducing opening 5 is slidably attached to the front side of the cartridge body 2c. The shutter member 6 is a flat plate member that is bent in a substantially U-shape along the outer shape of the cartridge body 2c, and each main surface portion is large enough to close the recording / reproducing opening 5. Has been formed. The shutter member 6 opens the recording / reproducing opening 5 only when loaded in the disc recording / reproducing apparatus 1, and when not in use, the recording / reproducing opening 5 is opened.
To block.

Further, a substantially circular opening (not shown) is formed in the center of the lower half 2b to expose the chucking plate 4 of the magneto-optical disk 3 to the outside, and the disk cartridge 2 is a disk. When loaded in the recording / reproducing apparatus 1, the chucking plate 4 is attached to the disc table 54 through this opening.

The disc cartridge 2 as described above is loaded into the disc recording / reproducing apparatus 1 with one side face orthogonal to the front face of the cartridge body 2c as an insertion end. At this time, the shutter member 6 is slid along the front surface of the cartridge body 2c. As a result, the disc cartridge 2 is opened in the recording / reproducing opening 5, and is ready for recording / reproducing with respect to the magneto-optical disc 3.

The disc recording / reproducing apparatus 1 using the disc cartridge 2 as described above is provided with an apparatus main body 10 into which the disc cartridge 2 is loaded.
The outer casing 11 of 0 is provided with an insertion / removal opening 11a into / from which the disc cartridge 2 is inserted / removed. A lid 12 is openably and closably attached to the insertion / removal opening 11a in order to prevent dust and the like from entering the inside of the apparatus body 10. The lid 12 opens the insertion / removal opening 11a only when the disc cartridge 2 is inserted / removed. Further, on the outer casing 11 of the apparatus body 10, operation buttons 13 for performing various operations such as recording, reproduction, editing, and volume control, and a liquid crystal display for displaying the operating status, the remaining power of the internal power supply, and the like. A panel 14 and the like are provided.

As shown in FIGS. 2 and 3, the apparatus main body 10 is held by the cartridge holder 15 for holding the disk cartridge 2 inserted from the insertion / removal opening 11a inside the outer casing 11, and the cartridge holder 15. The base 16 on which the disc cartridge 2 is mounted, and the base 16 on which the cartridge holder 15 is inserted and removed for inserting and removing the disc cartridge 2 through the opening 11 a of the outer casing 11.
The holder operating member 17 is moved between the disk cartridge 2 and the mounting position where the disk cartridge 2 is mounted.

The cartridge holder 15 has a main surface portion 15a facing the upper half 2a of the disc cartridge 2,
A pair of side surface portions 15b, 15c facing both side surface portions of the disc cartridge 2 and a pair of side surface portions 15b, 1
Disk cartridge 2 inserted along the inner surface of 5c
The insertion end and the back surface portion 15d facing each other are made of sheet metal integrally formed, and have an inner shape corresponding to the disc cartridge 2.

A magnetic head 77a, which will be described later, is provided in the main surface portion 15a of the cartridge holder 15 with an opening 5 for recording / reproducing.
An opening 18 for the head corresponding to the opening 5 on the upper half 2a side of the disk cartridge 2 is formed so as to enter the inside of the disk cartridge 2 through the through hole.
Further, the main surface portion 15a has a disk cartridge 2
In order to stably hold the disk cartridge 2 in the cartridge holder 15, an elastic displacement piece 19 is formed to press the disk cartridge 2 held in the cartridge holder 15 toward the base 16 side. The elastic displacement piece 19 is integrally formed with the main surface portion 15a by punching out the periphery thereof, and the tip portion is bent toward the base 16 side.

The cartridge holder 15 is provided with a pair of guide pins 20 on the back side of the pair of side surface portions 15b and 15c so as to project outward. Also,
A pair of guide projections 21 shorter than the guide pins 20 are formed on the front sides of the pair of side surface portions 15b and 15c so as to project outward. A shutter opening / closing mechanism (not shown) for opening / closing the shutter member 6 of the disk cartridge 2 is provided on the side surface portion 15c facing the front surface side of the disk cartridge 2. When the disc cartridge 2 is inserted into the cartridge holder 15, the shutter opening / closing mechanism opens the recording / reproducing opening 5 while sliding the shutter member 5 along the front surface of the cartridge body 2c, while the disc cartridge 2 is opened. When is discharged from the cartridge holder 15, the shutter member 6 is slid along the front surface of the cartridge body 2c while closing the recording / reproducing opening 5.

The base 16 has a main surface portion 16a facing the main surface portion 15a of the cartridge holder 15, a pair of side plate portions 16b and 16c facing the pair of side surface portions 15b and 15c of the cartridge holder 15, and the cartridge holder 15
The cartridge holder 15 described above is made of sheet metal integrally formed with a back surface portion 15d and an opposite back plate portion 16d.
Together with this, it constitutes a storage space in which the disc cartridge 2 is stored.

On the main surface portion 16a of the base 16, a plurality of positioning protrusions 22 for positioning when the disc cartridge 2 is mounted are formed to project. The lower half 2b of the disc cartridge 2 is provided with positioning recesses (not shown) that are engaged with the plurality of positioning projections 22, and the positioning projections 22 are engaged with these positioning recesses. By doing so, the disc cartridge 2 is positioned and fixed on the main surface portion 16a. In addition, an opening 23 for pickup corresponding to the opening 5 on the lower half 2b side of the disc cartridge 2 is formed in the main surface portion 16a so that an optical pickup 56, which will be described later, faces the magneto-optical disc 3. . Further, a leaf spring 24 for holding the shutter member 6 slid in the opening direction is attached to the main surface portion 16a. The leaf spring 24 is cantilevered on a surface opposite to the surface facing the disc cartridge 2, and a pressing protrusion 24a for pressing the shutter member 6 is provided at the tip end portion of the leaf spring 24. It is bent and formed so as to protrude from the hole portion 25 formed in the side toward the surface side facing the disc cartridge 2.

A pair of side plate portions 16b, 16c of the base 16
A pair of vertical slits 26 through which the above-mentioned pair of guide pins 20 of the cartridge holder 15 are inserted are cut out in the vertical direction.

The holder operating member 17 is provided between a main surface portion 17a facing the main surface portion 15a of the cartridge holder 15, a pair of side surface portions 15b and 15c of the cartridge holder 15 and a pair of side plate portions 16b and 16c of the base 16. The pair of slide portions 17b, 17c to be arranged is made of a sheet metal integrally formed.

On the main surface portion 17a of the holder operating member 17,
The cutout portion 27 for weight reduction has a pair of slide portions 17.
a connecting portion 28a connecting the b and 17c on the front side, and a pair of side edge portions 28b and 2 formed by extending from the connecting portion 28a to the rear side along the pair of slide portions 17b and 17c.
A notch is formed leaving 8c.

A pair of slide portions 1 of the holder operating member 17
7b and 17c have a pair of front and rear guide pins 29, respectively.
Are formed so as to project outward. On the other hand, base 1
A pair of front and rear horizontal slits 30 into which the guide pins 29 are inserted are formed in the pair of side plate portions 16b and 16c of the six cutouts in the front-rear direction. Therefore, the holder operating member 17 is supported slidably with respect to the base 16 in the insertion / removal direction of the disc cartridge 2.

A pair of front and rear cam slits (not shown) into which the pair of guide pins 20 and the pair of guide protrusions 21 of the cartridge holder 15 described above are respectively inserted are provided in the pair of slide portions 17b and 17c. Has been formed. These cam slits have a step shape that rises from the front surface side toward the back surface side, and when the pair of guide pins 20 and the pair of guide protrusions 21 are located at the end portions on the front surface side,
The cartridge holder 15 is held at a height at which the disc cartridge 2 is mounted, and the pair of guide pins 20
When the pair of guide protrusions 21 are located at the rear end portions, the cartridge holder 15 is moved to the disc cartridge 2
Hold it at the height at which it is inserted and removed. The pair of back-side guide pins 20 move vertically in the vertical slit 26 of the base 16 as the holder operating member 17 slides in the insertion / removal direction of the disc cartridge 2. Therefore, when the holder operating member 17 slides in the inserting direction of the disc cartridge 2, the holder operating member 17 moves the cartridge holder 15 to the mounting position while lowering the cartridge holder 15, and slides in the ejecting direction of the disc cartridge 2. At this time, while raising the cartridge holder 15, the cartridge holder 15 is moved to the insertion / removal position. In this way, the cartridge holder 15 is supported so as to be able to move up and down between the mounting position and the insertion / removal position.

Further, on the main surface portion 16a of the base 16, the holder operating member 17 is located on the surface opposite to the surface facing the disk cartridge 2.
First tension coil spring 3 for urging in the direction in which is inserted
1, a slide lever 32 that slides the holder operating member 17 in the direction in which the disc cartridge 2 is ejected against the bias of the first tension coil spring 31, and the slide lever 32 is inserted into the disc cartridge 2. The second tension coil spring 33 that urges in the direction and the holder operating member 17 that is moved in the ejection direction of the disc cartridge 2 against the urging force of the first tension coil spring 31.
And an eject lever 34 that pushes the disc cartridge 2 held by the cartridge holder 15 toward the opening 11a side of the outer casing 11, and urges the eject lever 34 in the direction in which the disc cartridge 2 is ejected. A third tension coil spring 35 is provided.

One end of the first tension coil spring 31 is hooked on a hooking piece 36 projectingly formed on one slide portion 17b of the holder operating member 17, and the other end is fixed to the base 1.
The holder operating member 17 is urged in the direction in which the disc cartridge 2 is inserted by being hooked by the hooking piece 37 formed to project from the one side plate portion 16b of the No. 6 side.

The slide lever 32 is made of an elongated flat plate member, and a pair of guide holes 38 are formed in both longitudinal ends of the slide lever 32 in the front-rear direction. On the other hand, a pair of headed guide pins 39 are attached to one side plate portion 16b of the base 16 in a state of being inserted through the pair of guide holes 38. Therefore, this slide lever 3
2 has a pair of headed guide pins 39 and a pair of guide holes 38.
The disk cartridge 2 is slidably supported in the insertion / removal direction by relatively moving inside. Further, the slide lever 32 has a first pressing piece 40a whose rear end portion is bent inward and a second pressing piece 40b formed to project in the middle portion thereof. Also, the second pressing pieces 40a, 40b are configured to come into contact with the pressed pieces 41a, 41b projectingly formed on the one slide portion 17b of the holder operating member 17. Therefore, the slide lever 32 slides in the ejecting direction of the disc cartridge 2 against the bias of the second tension coil spring 33, so that the first and second slide levers 32 are slid.
While pressing the pressing pieces 40a, 40b of the pressing pieces 41a, 41b, the holder operating member 17 is slid in the ejecting direction of the disc cartridge 2.

One end of the second tension coil spring 33 is hooked on a hooking piece 42 formed on the slide lever 32 so as to project, and the other end is hooked on one side plate portion 16b of the base 16 so as to project. By being hooked on the piece 43,
The slide lever 32 is urged in the direction in which the disc cartridge 2 is inserted.

The eject lever 34 is composed of a substantially L-shaped flat plate member, and is provided with a support shaft 44 on a back plate portion 16d of the base 16 and a corner portion on the side plate portion 16b side through a support shaft 45. A space between the one end 34a and the other end 34b is rotatably supported in the arrow R ₁ direction and the arrow R ₂ direction.

At one end 34a of the eject lever 34, a contact piece 46 for contacting the disc cartridge 2 is provided.
Is bent and formed inward of the cartridge holder 15 through an opening 47 formed in the main surface portion 15a of the cartridge holder 15. Further, at one end 34a of the eject lever 34, a restricting piece (not shown) for restricting the rotation of the third tension coil spring 35 in the direction of the arrow R ₁ is formed in a protruding manner. on the other hand,
The back plate portion 16d of the base 16 is provided with a guide portion 48 having a guide hole 48a for guiding the restriction piece. The guide hole 48 a is provided in the back plate portion 16 of the base 16.
d is formed over the intermediate portion of the discharge direction of the disk cartridge 2 from that by restricting piece of the eject lever 34 abuts against the end of the discharge direction of the disk cartridge 2, the eject lever 34 by the arrow R ₁ It regulates the angular range of rotation in the direction.

The other end 3 of the eject lever 34
A roller 50, which is in sliding contact with one side edge portion 17b of the holder operating member 17, is rotatably attached to 4b via a support shaft. Then, the eject lever 34 is
The other end 34b comes into contact with a locked piece 49 projectingly formed on one side edge 28b of the holder operating member 17 when rotated in the direction of the arrow R ₁ . As a result, the holder operating member 17 urged by the first tension coil spring 31 is stopped from moving in the insertion direction of the disc cartridge 2.

The third tension coil spring 35 has a hook hole 5 formed at one end 34a of the eject lever 34 at one end thereof.
1 and the other end of the holder operating member 17 is hooked by a hooking piece 52 formed on one side edge 28b of the holder operating member 17 to urge the eject lever 34 in the direction of arrow R _1. is doing.

As shown in FIGS. 2, 3 and 4, the apparatus main body 10 includes a disk rotation drive mechanism for rotationally driving the magneto-optical disk 3 housed in the disk cartridge 2, and the disk rotation drive mechanism. It has a recording / reproducing mechanism for recording or reproducing an information signal on or from the magneto-optical disk 3 which is rotationally driven.

The disk rotation drive mechanism is a spindle motor 53 which serves as a drive source for rotating the magneto-optical disk 3.
The spindle motor 53 is located substantially at the center of the main surface portion 16a of the base 16 and is arranged so that the drive shaft 53a projects toward the upper surface side. This drive shaft 53a
A disk table 54 is attached to the chuck table 4 of the magneto-optical disk 3.
A magnet 55 for magnetically attracting the chucking plate 4 is embedded in the disc table 54, and when the disc cartridge 2 held by the cartridge holder 15 is moved to the mounting position, the magneto-optical disc 3 is inserted. The chucking plate 4 is a magnet 55
Is magnetically attracted to. As a result, the magneto-optical disk 3 housed in the disk cartridge 2 is moved to the disk table 5
4, the magneto-optical disk 3 is rotatable together with the disk table 54.

The recording / reproducing mechanism has an optical pickup 56 for irradiating a light beam to one main surface of the magneto-optical disk 3 which is exposed from the recording / reproducing opening 5 of the disk cartridge 2 at the time of recording or reproducing. is doing.

The optical pickup 56 focuses a light beam coming from a semiconductor laser (not shown), which is a light source, by an objective lens 57 and irradiates the signal recording surface of the magneto-optical disc 3 with the light beam. Based on an optical system for detecting the returning light beam reflected on the signal recording surface of the disc by a photodetector (not shown) such as a light receiving element, and a detection signal from the magneto-optical disc 3 detected by the photodetector. And a biaxial actuator 58 for displacing and driving the objective lens 57 in a focusing direction parallel to the optical axis of the objective lens 57 and a tracking direction orthogonal to the optical axis direction of the objective lens 57. 3 performs recording / reproducing operation of an information signal with respect to No. 3, and also performs focusing control and tracking control of the objective lens 57 with respect to the magneto-optical disk 3.

The optical pickup 56 is moved by the pickup feeding mechanism 59 in the radial direction of the magneto-optical disk 3. This pickup feeding mechanism 59
As shown in FIGS. 4, 5 and 6, the optical pickup 5
It has a feed base 60 for supporting 6 and a pair of guide shafts 61, 62 for movably supporting the feed base 60 in the radial direction of the magneto-optical disk 3.

The feed base 60 is an optical pickup 56.
Is arranged so as to face the pickup opening 23 of the base 16, and an insertion hole 63 through which one guide shaft (hereinafter referred to as the main shaft) 61 is inserted is formed in the center of the side surface in the front-rear direction. A support portion 64 and a pair of support pieces 65 that sandwich the other guide shaft (hereinafter, referred to as a sub shaft) 62 are formed to project in mutually opposite directions. Therefore, the feed base 60 is supported so as to be movable in the radial direction of the magneto-optical disk 3 in the pickup opening 23 along the pair of guide shafts 61 and 62.

The pair of guide shafts 61 and 62 are arranged parallel to each other in the radial direction of the magneto-optical disk 3, and both ends thereof are fixedly supported around the pickup opening 23 of the base 16. Specifically, on the main surface portion 16a of the base 16 to which both ends of the pair of guide shafts 61 and 62 are fixedly supported, positioning projections 66 and 67 for positioning the guide shafts 61 and 62, and a positioning projection 66. , 6
A fixing screw 68 for fixing the guide shafts 61, 62 positioned at 7 is provided side by side on a straight line orthogonal to the guide shafts 61, 62 with the guide shafts 61, 62 interposed therebetween.

The positioning projections 66 for positioning both ends of the main shaft 61 are a pair of projections formed by drawing the main surface portion 16a of the base 16 as shown in FIGS. The main shaft 61 is positioned so as to be parallel to the radial direction of the magneto-optical disk 3 by being brought into contact with the pair of positioning protrusions 66. Further, the surface 66 a of the positioning protrusion 66 that comes into contact with the main shaft 61 is flattened along the axial direction of the main shaft 61, and by increasing the contact area with the main shaft 61,
It is possible to suppress the deformation of the main shaft 61 and the positioning protrusion 66 due to the tightening of the fixing screw 68.

On the other hand, as shown in FIGS. 9 and 10, the positioning projections 67 for positioning both ends of the counter shaft 62 are formed by bending a part of the main surface portion 16a of the base 16. The auxiliary shaft 62 is positioned so as to be parallel to the radial direction of the magneto-optical disk 3 by being brought into contact with the pair of bent pieces.

The positioning protrusions 66 and 67 formed of such protrusions and bent pieces can be directly and easily formed on the base 16 by drawing or bending the base 16. It is possible to reduce the number of parts and the manufacturing cost. In addition, here, the positioning protrusion 66 on the main shaft 61 side is used as a protrusion by drawing, and the positioning protrusion 67 on the auxiliary shaft 62 side is used as a bent piece by bending, but these positioning protrusions 66, 67 are used. There is no particular limitation as to whether the projection or the bent piece is used.

As shown in FIGS. 4 and 5, the guide shafts 61 and 62 positioned by the positioning protrusions 66 and 67 face the positioning protrusions 66 and 67 with the guide shafts 61 and 62 interposed therebetween. The fixing screw 68 arranged in this way positions and fixes the base 16.

Specifically, as shown in FIGS. 7 and 8 and FIGS. 9 and 10, the main surface portion 16a of the base 16 is
The above-mentioned positioning protrusions 66 and 67 and the screw holes 69 for attaching the fixing screws 68 are formed so as to be aligned on a straight line orthogonal to the guide shafts 61 and 62 with the guide shafts 61 and 62 interposed therebetween. . The fixing screw 68 is screwed into the screw hole 69 of the base 16 so that the head portion 68 a of the fixing screw 68 is provided.
Holds the guide shafts 61 and 62 together with the positioning protrusions 66 and 67, and presses the guide shafts 61 and 62 toward the main surface portion 16a of the base 16.

In this case, the positioning projections 66, 67 and the fixing screws 68 are provided on the base 16 so as to be aligned on a straight line orthogonal to the guide shafts 61, 62 with the guide shafts 61, 62 interposed therebetween. While suppressing the bending of the guide shafts 61 and 62 due to the tightening of the fixing screw 68,
Both ends of these guide shafts 61 and 62 can be appropriately positioned and fixed to the main surface portion 16a of the base 16.

On the other hand, when the positioning protrusions 66 and 67 and the fixing screws 68 are provided on the base 16 without being aligned on a straight line orthogonal to the guide shafts 61 and 62 with the guide shafts 61 and 62 interposed therebetween. In this case, shear stress due to the tightening of the fixing screw 68 acts on the guide shafts 61 and 62. In this case, the guide shafts 61 and 62 are bent, and the optical pickup 56 that is fed between the inner and outer peripheral sides of the magneto-optical disk 3 is tilted, or the optical pickup 56 and the magneto-optical disk are separated. The change in the distance to the disk 3 deteriorates the accuracy such as so-called Skew and R-Dependece.

As described above, in the pickup feed mechanism 59 to which the present invention is applied, the positioning projections 66 and 67 for positioning the guide shafts 61 and 62 and the positioning projections 66 and 67.
Since the fixing screws 68 for fixing the guide shafts 61, 62 positioned on the base 16 are provided on the base 16 side by side on a straight line orthogonal to the guide shafts 61, 62 with the guide shafts 61, 62 interposed therebetween. It is possible to accurately position and fix the guide shafts 61 and 62 with respect to the base 16 so that the guide shafts 61 and 62 are parallel to the radial direction of the magneto-optical disk 3 while suppressing the occurrence of bending. It is possible.

Further, as shown in FIGS. 7 and 8 and FIGS. 9 and 10, the main surface portion 16a of the base 16 is positioned between the positioning projections 66 and 67 and the fixing screw 68, and is provided with a guide shaft. The mounting portion 70 on which the parts 61 and 62 are mounted is formed so as to protrude by drawing the main surface portion 16 a of the base 16. The mounting portion 70 includes guide shafts 61, 62.
Is another positioning protrusion for positioning in the height direction. By matching the dimension in the height direction at both ends of the guide shafts 61 and 62, the distance between the optical pickup 56 and the magneto-optical disk 3 is reduced. It is possible to prevent the change over the inner and outer circumferences of the magneto-optical disk 3. Further, the mounting portion 70 is formed in a long shape along the axial direction of the guide shafts 61 and 62, and the upper end surface that abuts the guide shafts 61 and 62 is flattened. In this way, the mounting portion 7
0 and the guide shafts 61 and 62 have a large contact area, whereby the guide shaft 6 is tightened by the fixing screw 68.
It is possible to suppress the deformation of 1, 62.

Further, the pair of guide shafts 61 and 62 are provided with a groove portion 71 formed around the guide shafts 61 and 62 in order to prevent the guide shafts 61 and 62 from moving in the axial direction by tightening the fixing screw 68. An engagement protrusion 72 formed to protrude from the main surface portion 16a of the base 16 is engaged.

Specifically, the groove portion 71 is located in the vicinity of the end portion of the main shaft 61 on the inner peripheral side of the magneto-optical disk 3 and in the vicinity of the end portion of the auxiliary shaft 62 on the outer peripheral side of the magneto-optical disk 3, and these guide shafts are provided. 61 and 62 are formed so as to be cut out over the entire circumference. On the other hand, the engaging protrusion 72 is provided with the guide shafts 61, 6
The main surface portion 1 of the base 16 is located immediately below the second groove portion 71.
6a is formed by drawing. The guide shafts 61, 62 prevent the guide shafts 61, 62 from moving in the axial direction with respect to the base 16 when the fixing screw 68 is tightened by the engagement protrusions 72 engaging with the groove portions 71. It is possible. Further, even if the fixing screw 68 is loosely tightened, it is possible to prevent the guide shafts 61 and 62 from moving in the axial direction. Therefore, the pair of guide shafts 61 and 62 are
It is accurately positioned and fixed to the base 16.

In the pair of guide shafts 61 and 62, the positioning protrusions 66 and 67 and the mounting portion 70 described above are engaged with the groove 71 instead of the engaging protrusion 72. It is also possible to adopt a structure in which the movement of the guide shafts 61, 62 in the axial direction is prevented.

Further, the mounting portion 70 and the engaging projection 7 described above are provided.
2 can be directly and easily formed on the base 16 by drawing the base 16,
It is possible to reduce the number of parts and the manufacturing cost.

The pickup feeding mechanism 59 is shown in FIG.
And, as shown in FIG. 6, along the pair of guide shafts 61, 62 supported by such a base 16, the feed base 6
As a drive mechanism for displacing 0 in the radial direction of the magneto-optical disk 3, a feed screw 73 arranged in parallel with the main shaft 61 and a drive motor 7 for rotationally driving the feed screw 73.
4 and a rack spring 75 that is engaged with the feed screw 73 and is moved in the axial direction of the feed screw 73 by the rotational driving of the drive motor 74.

The feed screw 73 is formed integrally with the drive shaft of the drive motor 74, and a spiral screw thread portion 73a is formed on the outer peripheral surface thereof. Drive motor 7
Reference numeral 4 is a so-called stepping motor, which rotationally controls the feed screw 73 according to a drive pulse. These are supported by a bracket 76 attached to the main surface portion 16a of the base 16 by screwing or the like.
The bracket 76 is made of a flat plate member whose both ends are bent at right angles in the same direction, and the drive motor 74 is attached by screwing or the like with the feed screw 73 penetrated at one end, and the bearing provided at the other end. The feed screw 73 is rotatably supported by axially supporting the tip of the feed screw 73.

The rack spring 75 is made of an elastically displaceable member such as a metal material or a resin material. One end of the rack spring 75 is attached to the feed base 60 supporting the optical pickup 56 by screwing, and the other end thereof is in the axial direction of the feed screw 73. It has a support piece 75a formed by extending along. The support piece 75a is elastically displaceable in a direction of pressing the feed screw 73, and a rack portion 75b that is engaged with the screw thread portion 73a of the feed screw 73 is integrally formed at the tip end portion thereof. There is.

The pick-up feeding mechanism 59 includes a feed screw 7
While the 3 is rotationally driven by the drive motor 74, the rack spring 75 is displaced and driven in the axial direction of the feed screw 73 by the engagement of the screw screw portion 73a and the rack portion 75b. As a result, the optical pickup 56 is fed together with the feed base 60 in the direction along the pair of guide shafts 61 and 62, that is, in the radial direction of the magneto-optical disk 3.

As described above, in the pickup feed mechanism 59 to which the present invention is applied, since the pair of guide shafts 61 and 62 can be appropriately positioned and fixed to the base 16 without causing bending, The base 60 can be appropriately slid along the pair of guide shafts 61 and 62, and the optical pickup 56 mounted on the feed base 60 is appropriately fed over the inner and outer circumferences of the magneto-optical disc 3. It is possible.

Further, as shown in FIG. 2, the recording / reproducing mechanism applies an external magnetic field to the other main surface of the magneto-optical disc 3 which is exposed from the recording / reproducing opening 5 of the disc cartridge 2 at the time of recording. It has a magnetic head 77a for applying.

The magnetic head 77a is attached to the tip of the head attachment arm 77 so as to be opposed to the objective lens 57 of the optical pickup 56 via the magneto-optical disk 3. The head mounting arm 77 is made of an elastically displaceable member, and biases the magnetic head 77a toward the magneto-optical disk 3 side through the head opening 18 of the cartridge holder 15. In addition, the magnetic head 7
Reference numeral 7a denotes an optical pickup 56 which constitutes a recording / reproducing mechanism.
The base end portion of the head mounting arm 77 is supported by the feed base 60 via a substantially U-shaped connecting member 78 so as to be moved in the radial direction of the magneto-optical disk 3 in synchronism with.

Further, the magnetic head 77a is moved up and down in a direction in which it can be brought into contact with and separated from the magneto-optical disk by a head elevating mechanism. This head elevating mechanism elevates and lowers a cam lever 79 slidably supported on the main surface portion 15a of the cartridge holder 15 and a magnetic head 77a attached to the tip of a head attaching arm 77 by sliding the cam lever 79. Head lifting plate 80
And have.

The cam lever 79 is made of a flat plate member such as a metal plate, and a pair of guide holes 81 (not shown) are formed at both ends in the insertion / removal direction of the disc cartridge 2 in the front-rear direction. ing. On the other hand, a pair of headed guide pins 82 are attached to the main surface portion 15a of the cartridge holder 15 while being inserted into the pair of guide holes 81. Therefore, the cam lever 79 is slidably supported in the insertion / removal direction of the disc cartridge 2 by the relative movement of the pair of headed guide pins 82 in the pair of guide holes 81.

The cam lever 79 is slidably contacted with the head elevating plate 80 at the tip of a first cam leg 79a extending from the space between the pair of guide holes 81 toward the head elevating plate 80. It has a cam portion 83 that operates. The cam portion 83 is formed by bending the tip end portion of the first cam leg 79a, and the surface in sliding contact with the head elevating plate 80 is an inclined surface 83a rising in the insertion direction of the disc cartridge 2. ing.

The cam lever 79 is bent from the side opposite to the first cam leg 79a along one side surface portion 15b of the cartridge holder 15, and is inclined toward the disc cartridge inserting direction while the base 16 is being inclined.
The second cam leg 79b is formed so as to extend toward the main surface portion 16a.

The head elevating plate 80 is arranged at a position facing the head opening 18 of the cartridge holder 15, and a pair of support arms 84 is provided at both ends of the head mounting arm 77 on a side substantially orthogonal to the head mounting arm 77. Disk cartridge 2
Is formed so as to project in the insertion direction of. On the other hand, the main surface portion 15a of the cartridge holder 15 is provided with a pair of support portions 86 that rotatably support the tip end portions of the pair of support arms 84 via a support shaft 85. Therefore, the head elevating plate 80 supports the base end side of the head mounting arm 77 slidably in contact with the inner and outer peripheries of the magneto-optical disk 3 and swings in the direction in which the head mounting arm 77 moves toward and away from the magneto-optical disk 3. It is movable.

Further, the main surface portion 1 of the cartridge holder 15
An elastic displacement piece 87 for urging the head elevating plate 80 in a direction approaching the magneto-optical disk 3 is formed on 5a. The elastic displacement piece 87 is formed integrally with the main surface portion 15a of the cartridge holder 15 by punching out the periphery thereof, and the tip end portion thereof is the head lift plate 80.
The head elevating plate 80 is urged in the direction of approaching the magneto-optical disk 3 by being brought into contact with.

A pair of abutting pieces 88 abutting against the main surface portion 15a of the cartridge holder 15 are formed at both ends of the head elevating plate 80 on the side substantially orthogonal to the head mounting arm 77, The pair of abutting pieces 88 regulate the movement of the head elevating plate 80 in the direction of approaching the magneto-optical disk 3.

Further, the connecting member 78 for supporting the substrate portion of the head mounting arm 77 has a head regulating arm 89 for regulating the movement of the head mounting arm 77 by the head elevating plate 80 in the direction away from the magneto-optical disk 3. However, the head mounting arm 77 is mounted along the surface opposite to the surface facing the magneto-optical disk 3.

A cam piece 90 slidably contacting the head lift plate 80 with the cam portion 83 of the cam lever 79 described above.
The cam piece 90 is in sliding contact with the inclined surface 83 a of the cam portion 83 when the cam lever 79 is slid in the insertion / removal direction of the disc cartridge 2.

As shown in FIG. 4, the main surface portion 16a of the base 16 is located on the surface opposite to the surface facing the disk cartridge, and the cam lever 79 is inserted in the disk cartridge 2 in the insertion / removal direction. First to slide
Slide lever 91 and this first slide lever 9
The fourth tension coil spring 92 for urging the first tension lever 1 toward the ejection direction of the disc cartridge 2, and the first slide lever 91 against the urging force of the fourth tension coil spring 92 toward the insertion direction of the disc cartridge 2. The second slide lever 93 to be slid and the first slide lever 91
And a conversion lever 94 that makes the sliding directions of the second slide lever 93 and the second slide lever 93 opposite to each other.

The first slide lever 91 is made of an elongated flat plate member, is arranged along the side edge portion of the base 16 on the side plate portion 16b side, and is provided at both ends in the longitudinal direction thereof. A pair of guide holes 95 are formed in the front-rear direction. On the other hand, a pair of headed guide pins 96 are attached to the main surface portion 16a of the base 16 in a state of being inserted into the pair of guide holes 95. Therefore, the first slide lever 91 is slidably supported in the insertion / removal direction of the disc cartridge 2 by the relative movement of the pair of headed guide pins 96 in the pair of guide holes 95. Further, the first slide lever 91 includes the second cam leg 79 of the cam lever 79 described above.
An insertion hole 97 through which b is inserted is formed.

One end of the fourth tension coil spring 92 is hooked on a hooking piece 98 formed on the first slide lever 91 so as to project, and the other end is hooked on the main surface portion 16 a of the base 16. By being hooked on the stop piece 99,
The first slide lever 91 is urged in the ejection direction of the disc cartridge 2.

The second slide lever 93 is made of an elongated flat plate member, is arranged in parallel with the first slide lever 91, and has a pair of guide holes 100 at both longitudinal ends thereof. It is formed in the front-back direction. On the other hand, a pair of headed guide pins 101 are attached to the main surface portion 16a of the base 16 in a state of being inserted into the pair of guide holes 100. Therefore, the second slide lever 93 is supported so as to be slidable in the insertion / removal direction of the disc cartridge 2 by the relative movement of the pair of headed guide pins 101 in the pair of guide holes 100.

The conversion lever 94 is rotatably supported between one end and the other end via a support shaft 102 provided on the main surface portion 16a of the base 16, and the first end is provided at both ends thereof. The first engagement protrusion 103a and the second engagement protrusion 1 that are engaged with the slide lever 91 and the second slide lever 93.
03b is formed to project toward the base 16. On the other hand, the first slide lever 91 and the second slide lever 93 are located near the front-side guide holes 95 and 100, and the first engagement protrusion 103a and the second engagement protrusion 103a are formed. A first engagement hole 104a and a second engagement hole 104b that are engaged with 103b are formed. Therefore, the conversion lever 94 is capable of sliding the first slide lever 91 and the second slide lever 93 in opposite directions by being rotated around the support shaft 102.

An operating lever 106 is rotatably supported by the second slide lever 93 via a support shaft 105 provided near the guide hole 100 on the front surface side.
The actuating lever 106 is for sliding the second slide lever 93 in the insertion direction of the disc cartridge 2, and the second slide lever 93 from the base end portion.
Is formed so as to extend along with, and the middle portion is bent in a direction orthogonal to the second slide lever 93, so that the tip portion is formed to extend toward the one side plate portion 16b side of the base 16. It has a substantially L shape.
A guide hole 107 that draws an arc around the support shaft 105 is formed in the middle of the operating lever 106. on the other hand,
The second slide lever 93 is formed with an engagement protrusion 108 that is engaged with the guide hole 107. Therefore, in the operating lever 106, the angular range in which the engaging protrusion 108 is rotated about the support shaft 105 is restricted by the relative movement of the engaging protrusion 108 in the guide hole 107.

A locking piece 110 for locking one end of the fifth tension coil spring 109 is formed at the base end of the operating lever 106 so as to project in the opposite direction to the tip end. The other end of the tension coil spring 109 is hooked on a hooking piece 111 formed by extending from the second slide lever 93 in the direction opposite to the tip of the actuating lever 106. Therefore, the fifth tension coil spring 109 is
The actuating lever 106 is biased to one side in the rotating direction. At this time, in the actuating lever 106, the engaging projection 108 is brought into contact with one end of the guide hole 107, and the tip end portion of the restricting piece 112 is projectingly formed on the second slide lever 93.
Is contacted with. As a result, rotation of the operating lever 106 urged by the fifth tension coil spring 109 in one direction is restricted.

At the tip of the operating lever 106, the drive gear 1 axially supported by the main surface portion 16a of the base 16 is provided.
A cam piece 114 that abuts the pressing protrusion 113a of the protrusion 13 is formed to project. The cam piece 114 is used for the drive gear 11
By rotating 3 in one direction, the drive gear 1
By pressing the flat first pressed edge 114a pressed by the pressing protrusion 113a and the drive gear 113 in the other direction, the pressing protrusion 113 of the drive gear 113 is rotated.
It has a taper-shaped second pressed edge 114b that is pressed by a.

The drive gear 113 has, on its main surface facing the base 16, a pressing projection 113a which comes into contact with the cam piece 114 of the operating lever 106 described above. The drive gear 113 is rotationally driven by a drive motor 115 provided on the main surface portion 16 a of the base 16. Further, between the drive gear 113 and the drive motor 115, the drive motor 1
In order to adjust the driving force transmitted from 15 to the drive gear 113, a plurality of gears and the drive motor 11 that are meshed with each other are adjusted.
A gear group 116 composed of a worm gear attached to the drive shaft of No. 5 is arranged.

When the drive gear 113 is rotated in one direction by the drive motor 115, the pressing protrusion 113a presses the first pressed edge 114a of the cam piece 114, causing the operating lever 106 to move to the second slide lever. It is slid together with 93 in the insertion direction of the disc cartridge 2. The second slide lever 93 is provided on the main surface portion 16a of the base 16.
Is slid in the insertion direction of the disc cartridge 2, the regulating piece 1 of the second slide lever 93 described above is inserted.
A regulating edge 117 is provided that regulates the movement of the second slide lever 93 in the inserting direction by abutting on the regulating edge 117.

On the other hand, the drive gear 113 is the drive motor 11
When rotated in the other direction by 5, the pressing protrusion 113a presses the second pressed edge 114b of the cam piece 114,
The actuating lever 106 is rotated in the other direction against the biasing force of the tension coil spring 109. In addition, the above-described slide lever 32 has the drive gear 1 that is rotated in the other direction.
The pressed piece 11 that is pressed by the pressing protrusion 113a of 13
8 is formed to project. The slide lever 32 slides in the ejecting direction of the disc cartridge 2 when the pressed piece 118 is pressed by the pressing protrusion 113 a of the drive gear 113.

In the disc recording / reproducing apparatus 1 configured as described above, first, the disc cartridge 2 is attached to the outer casing 11
When the disc cartridge 2 is inserted into the cartridge holder 15 through the opening 11a, the disc cartridge 2 pushes the contact piece 46 of the eject lever 34 while resisting the bias of the third tension coil spring 35. Rotate in the direction of arrow R ₂ . When the disc cartridge 2 is inserted to the position where it is held by the cartridge holder 16, the locked state of the other end 34b of the eject lever 34 with respect to the locked piece 49 of the holder operating member 17 is released. Then, the holder operating member 17 biased by the first tension coil spring 31 causes the disk cartridge 2 to move.
Cartridge holder 1 while sliding in the insertion direction
5 is moved down to the main surface portion 16a side of the base 16 together with the disk cartridge 2. As a result, the disc cartridge 2 held by the cartridge holder 15 is moved from the insertion / removal position to the mounting position.

At this time, in the disc cartridge 2, the shutter member 5 is slid along the front surface of the cartridge body 2c by the shutter opening / closing mechanism to open the recording / reproducing opening 5. The shutter member 6 slid in the opening direction is held by the leaf spring 24 provided on the main surface portion 16 a of the base 16. Further, in the disc cartridge 2, the positioning projection 22 is engaged with the positioning recess provided in the lower half 2b,
The base 16 is positioned and fixed on the main surface portion 16a. The magneto-optical disc 3 housed in the disc cartridge 2 is mounted on the disc table 54 by the chucking plate 4 being magnetically attracted by the magnet 55.

As a result, the disc recording / reproducing apparatus 1 becomes ready for recording / reproducing with respect to the magneto-optical disc 3 housed in the disc cartridge 2.

Next, by operating the operation button 13 from this state, during reproduction, the spindle motor 53
The magneto-optical disc 3 mounted on the disc table 54
To rotate. Then, while the optical pickup 56 is being fed in the radial direction of the magneto-optical disk 3 by the pickup feeding mechanism 59, the optical pickup 56 is directed to one main surface of the magneto-optical disk 3 which is exposed from the recording / reproducing opening 5 of the disk cartridge 2. Then, the information signal is reproduced while irradiating the laser light.

On the other hand, at the time of recording, the head elevating mechanism lowers the magnetic head 77a to expose the magneto-optical disk 3 from the recording / reproducing opening 5 of the disk cartridge 2 to the outside.
The magnetic head 77a is brought into contact with or close to the other main surface.

Specifically, in the head elevating mechanism, the drive motor 115 rotationally drives the drive gear 113 in one direction, so that the pressing protrusion 113a of the drive gear 113 causes the first pressed edge of the cam piece 114. 114a is pressed, and the operating lever 106 is slid in the ejecting direction of the disc cartridge 2 together with the second slide lever 93. Along with this, the conversion lever 94 is rotated, and the first slide lever 91 is slid in the insertion direction of the disc cartridge 2 against the bias of the fourth tension coil spring 92. Further, the cam lever 79 in which the second cam leg 79b is inserted into the insertion hole 97 of the first slide lever 91 is slid in the insertion direction of the disc cartridge 2 together with the first slide lever 91. At this time, the cam piece 90 of the head elevating plate 80 has the cam portion 83 of the cam lever 79.
Is slidably contacted with and moves downward along the inclined surface portion 83a of the cam portion 83. Along with this, the head elevating plate 80 descends, and the magnetic head 77a attached to the tip of the head attaching arm 77 descends in the direction approaching the magneto-optical disc 3 through the head opening 18. As a result, the magnetic head 76 comes into contact with or comes close to the magneto-optical disk that faces the outside from the recording / reproducing opening 5 of the disk cartridge 2.

From this state, the magneto-optical disk 3
While the optical pickup 56 and the magnetic head 77a, which are arranged to face each other via the recording medium, are moved by the pickup feeding mechanism 59 in the radial direction of the magneto-optical disk 3, the optical pickup 56 moves outward from the recording / reproducing opening 5. While irradiating the one main surface of the magneto-optical disk 3 with laser light, the magnetic head 77a applies an external magnetic field to the other main surface of the magneto-optical disk 3 facing outward from the recording / reproducing opening 5. As a result, the information signal is recorded.

When the recording operation is completed, the head elevating mechanism reverses the operation described above, that is, the drive motor 115 rotationally drives the drive gear 113 in the other direction, so that the tip of the head mounting arm 77 is moved. The magnetic head 77a attached to the section is raised and returned to the original position again.

By the way, when such a recording / reproducing operation is performed, even if a slight bending of the guide shafts 61 and 62 described above has a great influence on the overall system, they are supported by the base 16. It is extremely important that the guide shafts 61 and 62 do not bend.

Therefore, the pickup feed mechanism 5 described above is used.
In order to prevent the guide shafts 61 and 62 from bending, the base 16 that supports both ends of the guide shafts 61 and 62 has positioning protrusions 66 and 67 for positioning the guide shafts 61 and 62. And a fixing screw 68 for fixing the guide shafts 61, 62 positioned on the positioning protrusions 66, 67 with the guide shafts 61, 62 sandwiched therebetween.
It is provided so as to line up on a straight line orthogonal to 1, 62.

As a result, in the disc recording / reproducing apparatus 1 to which the present invention is applied, the guide shafts 61 and 62 are prevented from being bent and are arranged so as to be parallel to the radial direction of the magneto-optical disc 3. The guide shafts 61 and 62 can be accurately positioned and fixed to the base 16. Therefore, in the disc recording / reproducing apparatus 1, the optical pickup 56, which is fed between the inner and outer circumferences of the magneto-optical disc 3, is tilted, or the optical pickup 56 and the magneto-optical disc 3 are tilted. It is possible to prevent deterioration in accuracy such as so-called skew (Skew) and R-Dependece due to the change in distance, and to add a new component to support a high-density recording / reproducing system. It is possible to appropriately feed the optical pickup 56 in the radial direction of the optical disk without adding it.

Next, the disk cartridge 2 is attached to the outer casing 11
When ejecting from the opening 11a of the
By making the drive gear 113,
5 is driven to rotate in the other direction. Then this drive
The pressing protrusion 113 a of the gear 113 is attached to the slide lever 32.
The pressed piece 118 is pressed and the slide lever 32 is moved to the second position.
Disc cartridge against the bias of the tension coil spring 33
Slide it in the discharge direction of the wedge 2. With this,
First and second pressing pieces 40a, 4 of the slide lever 32
0b does not press the pressed piece 41 of the holder operating member 17,
The holder operating member 17 to the disk cartridge 2
Slide in the discharge direction. This allows the cartridge
The holder 15 moves up together with the disc cartridge 2.
It Then, the cartridge holder 15 is inserted from the mounting position.
When the holder operation member 17 is moved to the detached position,
The side edge 17b on one side is in sliding contact with the roller 50.
The eject lever 34 is attached to the third tension coil spring 35.
Powered by arrow R₁Rotate vigorously in the direction. Then,
The contact piece 46 of the eject lever 34 is attached to the cartridge holder.
Do not press the disk cartridge 2 held by the disk 15.
The disk cartridge 2 is attached to the opening of the outer casing 11.
It is discharged from 11a to the outside. Also, the arrow R ₁In the direction
The other end 34b of the rotated eject lever 34 is held.
By contacting with the locked piece 49 of the operation member 17,
The holder operation biased by the first tension coil spring 31.
The working member 17 moves in the insertion direction of the disc cartridge 2.
Lock it.

As a result, the disc cartridge 2 held by the cartridge holder 15 can be moved from the mounting position to the insertion / removal position and can be ejected to the outside from the opening 11a of the outer casing 11.

The drive motor 115 is driven by the drive gear 113.
By further rotating the lever in the other direction, the engagement between the pressing protrusion 113a of the drive gear 113 and the pressed piece 118 of the slide lever 32 is released, and the slide lever 32 biases the second tension coil spring 33. As a result, the disc cartridge is returned to the end on the insertion side.

Also, the pressing protrusion 113a of the drive gear 113
By pressing the second pressed edge 114b of the cam piece 114, the operating lever 106 is rotated in the other direction against the biasing force of the fifth tension coil spring 109. Then, the drive motor 115 further drives the drive gear 113 to rotate in the other direction, so that the pressing protrusion 113 a of the drive gear 113 and the second pressed edge 114 b of the cam piece 114.
Is disengaged, and the operating lever 106 is returned to the one side in the rotating direction again by the urging force of the fifth tension coil spring 109. As a result, in the disc recording / reproducing apparatus 1, the disc cartridge 2 is returned to the state before being loaded in the apparatus body 10.

In this disc recording / reproducing apparatus 1,
By forcibly sliding the slide lever 32 in the ejection direction of the disc cartridge 2, the disc cartridge 2 held by the cartridge holder 15 is moved from the mounting position to the insertion / removal position, and the opening 1 of the outer casing 11 is opened.
It is also possible to discharge from 1a to the outside.

The present invention is not necessarily limited to the disc recording / reproducing apparatus 1 for recording / reproducing information signals on / from the magneto-optical disc 3 housed in the disc cartridge 2 described above. The present invention can be widely applied to recording and / or reproducing devices equipped with a pickup feeding mechanism for feeding the disc in the radial direction.
Further, as an optical disc used in such a recording and / or reproducing apparatus, in addition to the above-described magneto-optical disc 3, a reproduction-only disc in which an audio signal, an image signal, an information signal such as a program are recorded in advance. Examples include optical disks, write-once optical disks that can write these information signals only once, and rewritable optical disks that can repeatedly rewrite these information. These optical disks can be rotated in a disk cartridge. It may be stored in.

[0109]

As described in detail above, according to the present invention, it is possible to suppress the occurrence of bending of the guide shaft and to appropriately feed the optical pickup in the radial direction of the optical disc. Therefore, it is possible to properly record and / or reproduce the signal on the optical disc.

[Brief description of drawings]

FIG. 1 is a perspective view showing the outer appearance of a disc recording / reproducing apparatus to which the present invention is applied.

FIG. 2 is a perspective view showing a configuration of a device body of the disc recording / reproducing device.

FIG. 3 is a perspective view showing a configuration of a base of the disc recording / reproducing apparatus.

FIG. 4 is a plan view showing a configuration of a base of the disc recording / reproducing apparatus.

FIG. 5 is a plan view showing a configuration of a pickup feeding mechanism to which the present invention is applied.

FIG. 6 is a side view showing a configuration of the pickup feed mechanism.

FIG. 7 is a plan view of a main part showing a mounted state of a main shaft of the pickup feed mechanism.

FIG. 8 is a cross-sectional view of essential parts showing a mounted state of a main shaft of the pickup feed mechanism.

FIG. 9 is a plan view of relevant parts showing a mounting state of a sub shaft of the pickup feeding mechanism.

FIG. 10 is a sectional view of an essential part showing a mounting state of a sub shaft of the pickup feeding mechanism.

[Explanation of symbols]

1 disc recording / reproducing device, 2 disc cartridge, 3 magneto-optical disc, 10 device body, 15 cartridge holder, 16 base, 17 holder operating member, 31 first tension coil spring, 32 slide lever, 33 second tension coil spring, 34 Eject lever, 35 Third tension coil spring, 53 Spindle motor, 54 Disc table, 56 Optical pickup, 59 Pickup feed mechanism (device), 6
0 Feed base, 61 One guide shaft (spindle), 62
Other guide shaft (secondary shaft), 66, 67 positioning protrusion, 68 fixing screw, 70 mounting portion, 71 groove portion, 72
Engagement protrusion, 73 Feed screw, 74 Drive motor, 75
Rack spring, 77a magnetic head, 77 head mounting arm, 79 cam lever, 80 head lifting plate, 91
First slide lever, 92 fourth tension coil spring, 93 second slide lever, 94 conversion lever,
106 Actuating Lever, 109 Fifth Extension Coil Spring, 113 Drive Gear, 115 Drive Motor, 116
Gear group

Claims (12)

[Claims] 1. Recording and / or recording of a signal on an optical disc
Alternatively, in a pickup feed device for feeding and operating an optical pickup for reproduction in a radial direction of an optical disc, a guide shaft for movably supporting the optical pickup in the radial direction of the optical disc is provided, and both ends of the guide shaft are provided. On the supported base, a positioning protrusion that positions the guide shaft and a fixing screw that fixes the guide shaft positioned on the positioning protrusion are straight lines that are substantially orthogonal to the guide shaft with the guide shaft interposed therebetween. A pickup feeding device, which is provided side by side on top. 2. The pickup feeding device according to claim 1, wherein the positioning protrusion is formed on the base by drawing. 3. The pickup feed device according to claim 1, wherein a surface of the positioning protrusion that contacts the guide shaft is flattened. 4. The pickup feed device according to claim 1, wherein the base is provided with an engagement protrusion that engages with a groove formed around the guide shaft. 5. The base is further provided with another positioning projection for positioning the guide shaft in the height direction, the positioning projection being located between the positioning projection and the fixing screw. The pickup feeding device according to claim 1. 6. Recording and / or recording a signal on an optical disc
Alternatively, in a pickup feed device for feeding and operating an optical pickup for reproduction in a radial direction of an optical disc, a guide shaft for movably supporting the optical pickup in the radial direction of the optical disc is provided, and both ends of the guide shaft are provided. The base to be supported is engaged with a positioning projection for positioning the guide shaft, a fixing screw for fixing the guide shaft positioned on the positioning projection, and a groove formed around the axis of the guide shaft. An engaging protrusion is provided. 7. A disk rotation drive mechanism for rotating and driving an optical disk, an optical pickup for recording and / or reproducing a signal to and from an optical disk rotationally driven by the disk rotation drive mechanism, and the optical pickup described above. The optical disc includes a pickup feed mechanism for moving the optical disc in the radial direction, and a base for supporting the disc rotation drive mechanism and the pickup feed mechanism. The pickup feed mechanism moves the optical pickup in the radial direction of the optical disc. A guide shaft that supports the guide shaft, and a positioning protrusion that positions the guide shaft on the base on which both ends of the guide shaft are supported;
A fixing screw for fixing the guide shaft positioned on the positioning protrusion, and the fixing screw are provided side by side on a straight line substantially orthogonal to the guide shaft with the guide shaft interposed therebetween. And / or a playback device. 8. The recording and / or reproducing apparatus according to claim 7, wherein the positioning protrusion is formed on the base by drawing. 9. The recording and / or reproducing apparatus according to claim 7, wherein a surface of the positioning protrusion that contacts the guide shaft is flattened. 10. The recording and / or reproducing apparatus according to claim 7, wherein the base is provided with an engaging projection that engages with a groove formed around the guide shaft. apparatus. 11. The base is provided with another positioning projection for positioning the guide shaft in the height direction, the positioning projection being located between the positioning projection and the fixing screw. The recording and / or reproducing apparatus according to claim 7. 12. A disk rotation drive mechanism for rotationally driving an optical disk, an optical pickup for recording and / or reproducing a signal on an optical disk rotationally driven by the disk rotation drive mechanism, and the optical pickup as described above. The optical disc includes a pickup feed mechanism for moving the optical disc in the radial direction, and a base for supporting the disc rotation drive mechanism and the pickup feed mechanism. The pickup feed mechanism moves the optical pickup in the radial direction of the optical disc. A base having a guide shaft that supports the guide shaft, and both ends of the guide shaft are supported, and a positioning protrusion that positions the guide shaft, and a fixing screw that fixes the guide shaft positioned on the positioning protrusion. And an engaging protrusion that engages with a groove formed around the axis of the guide shaft. Recording and / or reproducing apparatus, characterized in that it is.