JPH10308048A - Recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the space between the inner wall of a cartridge case and an optical disk incorporated in this cartridge case. SOLUTION: Two positioning shafts 12 are provided at the end part of a chassis 3, and two supporting parts 3g are provided at the another position of the chassis 3. This chassis 3 is in the state turned downward around a turning fulcrum 3f when the cartridge case 2 is not mounted, but when it is mounted while being placed on a tray, the chassis 3 is turned upward around the turning fulcrum 3f, and the positioning shafts 12 are fitted into fitting holes on the bottom surface 2d of the cartridge case 2 through an opening part of the tray, then the supporting parts 3g are abutted on the bottom surface 2d. At this time, the abutting surfaces of the positioning shafts 12 are abutted on this bottom surface 2d, then the position of the cartridge case 2 in the direction of thickness is settled by these positioning shafts and the supporting members 3g.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus for recording / reproducing information on / from a disk-shaped recording medium accommodated in a cartridge case, and more particularly to a positioning and a stabilizing posture of the cartridge case during operation. .

[0002]

2. Description of the Related Art FIG. 6 shows a disc-shaped recording medium for recording or reproducing information (here, an example of a recording medium on which optical recording or reproduction is performed, and such a recording medium is hereinafter referred to as an optical disk) is a cartridge. FIG. 2 is a perspective view showing an example of a disk cartridge housed in a case, wherein 1 is an optical disk, 1a is a center hole, 2 is a cartridge case,
2a and 2b are fitting holes, 2c is an opening, and 2d is a bottom surface.

In FIG. 1, a disk cartridge is
The optical disc 1 is rotatably stored in the cartridge case 2. On the bottom of the cartridge case 2,
An opening 2c for exposing a part of the optical disk 1, and a fitting hole 2 for positioning the cartridge case 2 when the disk cartridge is mounted on a recording / reproducing apparatus.
a and 2b are provided.

Here, the bottom surface 2d of the cartridge case 2
Assuming that two directions parallel to X and Y are the X and Y directions and the thickness direction of the cartridge case 2 is the Z direction, the opening c extends in the Y direction and exposes a radial portion including the center hole 1a of the optical disc 1. The two fitting holes 2a and 2b are arranged along a side of the cartridge case 2 parallel to the X direction.

An apparatus for recording or reproducing information on or from the optical disk 1 accommodated in the cartridge case 2 as described above, that is, a conventional example of a recording / reproducing apparatus is described in, for example, JP-A-7-161112. ing. Hereinafter, this will be described with reference to FIG. In the figure, 3 is a chassis, 3f is a rotation fulcrum, 4 is an optical pickup, 8 is a turntable, 9 is a spindle motor, 12 is a positioning shaft, 12a is a contact surface, 21 is a rotation pin, 22 Is a housing, 25 is a tray, 25a is a mounting surface, 25b is an opening,
26 is a cartridge retainer, 27 is a top chassis, and portions corresponding to FIG. 6 are denoted by the same reference numerals.

First, in FIG. 7A, a turntable 8 as a mounting surface on which the optical disk 1 stored in the cartridge case 2 is mounted is fixed to a rotating shaft of a spindle motor 9 on the chassis 3. In addition, the positioning shaft 12 (here, the fitting shaft 2 (here, the fitting hole 2 b) is detachably fitted with the two positioning fitting holes 2 a (the fitting holes 2 b are not shown) provided in the cartridge case 2. (Only one is shown). These positioning shafts 1
2 is provided with a contact surface 12a. When the positioning shaft 12 is fitted into the fitting holes 2a and 2b of the cartridge case 2, the contact surface 12a contacts the bottom surface 2d of the cartridge case 2. Further, an optical pickup 4 for recording or reproducing information on the optical disk 1 is provided on the lower surface side of the chassis 3 so as to be reciprocally movable away from the turntable 8 side.

[0007] The chassis 3 is attached to the back of the housing 22 by a pivot 3f, and is rotatable up and down around the pivot 3f. A rotating pin 21 is provided at a front end of the chassis 3 in the housing 22. The rotating pin 21 is vertically moved by a driving member (not shown) to rotate the chassis 3. It rotates vertically about the fulcrum 3f.

An opening 22 is formed in the front side wall of the housing 22.
a, and a tray 25 is provided so as to be movable in the directions of arrows A and A ′ through the opening 22a, so that the tray 25 can be put into or out of the housing 22. ing. The movement of the tray 25 is performed by a tray driving member (not shown) in which a gear meshes with a rack gear (not shown) provided on the back surface of the tray 25.

As shown, the tray 25 is
When the disk cartridge is ejected from the tray 25, the disc cartridge to be mounted is mounted on the mounting surface 25a formed on the bottom of the tray 25.
Can be mounted on top. When a tray operation button (not shown) is operated, a tray 2 with a disc cartridge mounted thereon is operated.
5 is moved in the direction of arrow A by the above-mentioned tray driving means, and the cartridge case 2 containing the optical disk 1 is conveyed into the housing 22 to be in the state shown in FIG. 7B.

In the state shown in FIG. 7 (b), as shown, the chassis 3 is pivoted downward, so that the movement of the tray 25 is not hindered. Also,
Top Chassis 27 Fitted on Case 22 and Top Surface
Is provided with a cartridge holder 26 having elasticity at the center portion and the near side of the housing 22.
The cartridge holder 2 presses the cartridge case 2 against the mounting surface 25 a of the tray 25, and stabilizes the cartridge case 2 with respect to the tray 25.

When the tray 25 moves to a predetermined position in the housing 22, a detector (not shown) detects this, the tray 25 stops, and the rotating pin 21 is lifted by the above-mentioned driving member (not shown). As a result, the chassis 3 rotates upward about the pivot 3f. At the same time, the positioning shaft 12, the turntable 8, the spindle motor 9, the optical pickup 4 and the like are lifted. Here, at the bottom of the tray 25, two openings 2 through which the positioning shaft 12 passes and protrude toward the mounting surface side.
5b (here, only one is shown), an opening through which the turntable 8 penetrates, and an opening through which the light beam from the optical pickup that moves as described above passes.

When the chassis 3 is rotated upward about the rotation fulcrum 3f and is in a state parallel to the tray 25 as shown in FIG. 25b through the mounting surface 25a of the tray 25
And fit into the fitting holes 2a and 2b of the cartridge case 2. At this time, the mounting surfaces 12a of the positioning shafts 12 abut on portions around the fitting holes 2a and 2b on the lower surface of the cartridge case 2. As a result, the cartridge case 2
The positions in the X and Y directions are fixed. The turntable 8 is connected to the cartridge case 2 through the opening of the tray.
Thus, the optical disc 1 housed in the cartridge case 2 is mounted on the turntable 8. At this time, the hub 8a of the turntable 8 is fitted into the center hole 1a of the optical disc 1, whereby the rotation center of the optical disc 1 is set at the center of the center hole 1a. Further, a portion around the center hole 1a of the optical disc 1 is pressed against the turntable 8 by a clamper (not shown), whereby the optical disc 1 is fixed (clamped) to the turntable 8. In such a state, the recording or reproduction range from the inner circumference to the outer circumference of the optical disc 1 along the moving path of the optical pickup 4 is controlled by the opening provided in the tray 25.
Is exposed to

In the state shown in FIG. 7C, the contact position between the contact surface 12a of the positioning shaft 12 and the bottom surface 2d of the cartridge case 2 and the bottom surface 2 of the cartridge case 2
The thickness direction (Z-direction) of the cartridge case 2 is determined by the contact point between d and the mounting surface 25a of the tray 25. The optical disc 1 is held by the turntable 8 at a position where a gap with the inner wall of the cartridge case 2 is secured.

In the state shown in FIG. 7C, the optical disc 1 is rotated by the spindle motor 9 and the optical pickup 4 moves in the recording or reproduction range from the inner circumference to the outer circumference of the optical disc 1 while moving. By irradiating the optical disc 1, information is recorded or reproduced on the optical disc 1.

[0015]

By the way, high-density recording is required more and more in the future, but in order to cope with this, it is essential to maintain high dimensional accuracy of each component. In particular, the optical axis of the light beam emitted from the optical pickup 4 for recording or reproducing and the optical disc 1
It is required that the angle between the recording and playback surfaces be very accurate, and in particular, that the angle be made very square with very high accuracy.
In order to satisfy such demands, it has become difficult to manage only the precision of the parts, and it has become necessary to secure the required precision with a mechanical adjustment mechanism.

As a method using such an adjusting mechanism,
There are two methods, a method of adjusting the amount of inclination of the optical axis of the optical pickup 4 and a method of adjusting the amount of inclination of the optical disc 1. The latter method, whose configuration can be relatively simplified, is
It is expected to spread in the future.

This method of adjusting the amount of tilt of the optical disk 1 adjusts the amount of tilt of the optical disk 1 without changing the position of the cartridge case 2. In the worst case, the outer circumferential end surface of the optical disc 1 may be positioned at the cartridge case 2 if the gap between the cartridge case 2 and the positioning direction in the thickness direction (Z direction) of the cartridge case 2 is large.
A problem of rubbing against the inner wall of the vehicle.

In the above-mentioned conventional technique, the position in the thickness direction of the optical disk 1 stored in the cartridge case 2 is determined by the position in the thickness direction of the turntable 8 mounted on the chassis 3. On the other hand, the position of the cartridge case 2 in the thickness direction is the contact surface 12 of the positioning shaft 12 provided on the chassis 3.
The position of the tray 2 is determined by the position of the bottom surface 2d of the cartridge case 2 that contacts the cartridge case 2 and the position of the mounting surface 25a of the tray 25 with which the bottom surface 2d of the cartridge case 2 contacts. In this case, the side where the bottom surface 2d of the cartridge case 2 contacts the contact surface 12a of the positioning shaft 12 is lifted from the contact surface 25a of the tray 25,
The opposite side is in contact with the contact surface 25a of the tray 25.

Therefore, the variation in the positioning of the optical disk 1 in the thickness direction is affected by the dimensional accuracy of the turntable 8 and the mounting accuracy to the chassis 3, whereas the variation in the positioning of the cartridge case 2 in the thickness direction is The influence of the dimensional accuracy of the positioning shaft 12 and the mounting accuracy on the chassis 3 depends on the dimensional accuracy of the tray 25 and this tray 2.
The influence of the dimensional accuracy of the parts to be fitted with the cartridge 5 is superimposed (that is, not only the accuracy of the parts attached to the chassis 3 but also the accuracy of the tray 25 which is a part separate from the chassis 3). Influences the positioning variation in the direction). Therefore, there is a problem that the variation in the positioning of the cartridge case 2 in the thickness direction with respect to the optical disc 1 becomes large, and the outer peripheral end surface of the optical disc 1 is easily rubbed with the inner wall of the cartridge case 2.

An object of the present invention is to solve such a problem, reduce the amount of variation in positioning in the thickness direction of the cartridge case, and define a gap between the outer peripheral end surface of the disc-shaped recording medium and the inner wall of the cartridge case. It is another object of the present invention to provide a recording / reproducing apparatus which can secure the information.

Another object of the present invention is that the disk-shaped recording medium is an optical disk, and the adjustment range of the perpendicularity between the optical axis of the irradiation light from the optical pickup and the recording or reproducing surface of the optical disk is widened. It is another object of the present invention to provide a recording / reproducing device which can be used.

[0022]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is directed to a surface which can be fitted into and removed from two fitting holes for positioning a cartridge case, and which comes into contact with the bottom surface of the cartridge case. A positioning shaft,
A support member that contacts the bottom surface of the cartridge case at a position different from the positioning shaft is provided on the chassis, and the positioning shaft and the support member are passed through the bottom of the tray provided with the mounting surface for mounting the cartridge case. An opening is provided to protrude toward the cartridge case mounted on the mounting surface, and the tray mounting the cartridge case is positioned in the housing and the chassis is rotated by the rotating operation to mount the positioning shaft mounting surface and the support member. With this, the cartridge case is positioned in the thickness direction.

As described above, since the positioning accuracy in the thickness direction of the cartridge case is determined by the component accuracy between the positioning shaft and the support member on the chassis, the influence of the dimensional accuracy of other components such as the tray is minimized. Thus, such a variation in positioning can be suppressed.
Therefore, a gap between the optical disk placed on the turntable and the inner wall of the cartridge case can be secured with high accuracy, and the perpendicularity between the optical axis of the light emitted from the optical pickup and the recording or reproducing surface of the optical disk can be secured. Can be widened.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. First, the configuration of an embodiment of the recording / reproducing apparatus according to the present invention will be described with reference to FIGS. Here, FIG. 2 is a plan view showing the configuration of the chassis 3 as viewed from the front side of the housing, FIG. 3 is a side view of the chassis 3 as viewed from the arrow B side, and FIG. 4 (a) is from the arrow C side of FIG. Front view, FIG. 4
4B is a cross-sectional view showing an enlarged part of the right part of FIG. 4A, and FIG. 4C is a cross-sectional view showing an enlarged part of the left part of FIG. 4A. Yes, 3a, 3b, 3c, 3d
Is a mounting portion, 3e is an opening portion, 3g and 3h are support portions, 5 is a main feed guide, 6 is a sub feed guide, 7 is a screw, 9a is a stator substrate, 10 is a leaf spring, 11 is an adjusting screw, 13 Is a positioning shaft, 13a is a contact surface, 14 is a feed motor, 15 is an encoder gear, 15a is a gear, 15b is a slit plate, 16 is a photocoupler, 17 is an intermediate gear, 18
Is a two-stage gear, 18a is a large gear, 18b is a small gear, 19 is a rack gear, 20 is a pressing spring, 23 and 24 are detection switches, 28 is a board, and 30 is a reference pin. Are the same and are denoted by the same reference numerals, and redundant description is omitted.

In FIG. 2 to FIG.
An opening 3e whose side is substantially rectangular in the direction of arrow C is provided. Along the respective sides of this opening 3e in the direction of arrow C, the main feeding guide 5 and the sub feeding guide 6 of the optical pickup 4 are provided. Are provided in parallel with each other. The feed main guide 5 has both ends fixed to mounting portions 3 a and 3 b provided on the chassis 3 by screws 7, and the feed sub guide 6 also has mounting ends provided with the both ends on the chassis 3. 3c and 3d are fixed by screws 7. The optical pickup 4 is slidably mounted on the main feed guide 5 and the sub feed guide 6. The moving range of the optical pickup 4 includes the range from the innermost periphery to the outermost periphery on the recording or reproducing surface of the optical disk (not shown) to be mounted. Or it is on the innermost peripheral side of the reproduction surface. The opening 3e allows the optical pickup 4 to move within this movement range without being disturbed by the chassis 3, and allows the light beam from the optical pickup 4 to irradiate the mounted optical disk. .

A feed motor 14 for the optical pickup 4 is attached to the right corner of the rear of the chassis 3 when viewed from the arrow C, and its rotation shaft projects from the rear surface of the chassis 3.
An encoder gear 15 including a slit plate 15b having a large number of slits and a gear 15a is fixed to a portion of the rotating shaft on the rear surface side of the chassis 3. This gear 15
a meshes with an intermediate gear 17 rotatably provided on the rear surface of the chassis 3, and this intermediate gear 17 meshes with a large gear 18 a of a two-stage gear 18 rotatably provided on the rear surface of the chassis 3. And the small gear 18b of the two-stage gear 18
Are engaged with a rack gear 19 fixed to the optical pickup 4.

With this structure, when the feed motor 14 rotates, the rotational driving force is applied to the gear 1 of the encoder gear 15.
5a, transmitted to the two-stage gear 18 via the intermediate gear 17,
The rotational driving force is converted into a horizontal driving force by the meshing between the small gear 18b of the two-stage gear 18 and the rack gear 19,
The optical pickup 4 moves in the direction of arrow C and the opposite direction along the main and sub guides 5 and 6 for feeding.

The slit plate 1 of the encoder gear 15
5b, a photocoupler 16 composed of a light emitting element and a light receiving element arranged so as to sandwich the slit.
When the slit plate 15b rotates, an electric signal which alternates between high and low levels is generated. A control signal for controlling the number of rotations of the feed motor 14 is formed from the electric signal, and is controlled so that the moving speed of the optical pickup 4 becomes a predetermined speed.

Although not shown, in order to prevent backlash between the small gear 18b of the two-stage gear 18 and the rack gear 19, for example, the rack gear 19 is biased by a spring in one of the moving directions. .

As in the prior art described with reference to FIG. 7, the chassis 3 has one end at the back as viewed in the direction of arrow C, as shown in FIG. And a vertical direction (arrow D,
(D 'direction). Further, similarly to the related art described with reference to FIG. 7, a rotation pin 21 for rotating the chassis 3 in the vertical direction is fixed to the left and right of the front end of the chassis 3 when viewed in the direction of arrow C. .

As viewed in the direction of arrow C of the chassis 3, the spindle motor 6
And a turntable 8 fixed to the rotating shaft. A stator substrate 9a on which a drive circuit for the spindle motor 9 is mounted is integrally formed with the spindle motor 9. The stator substrate 9a is attached to the chassis 3 at three points, namely, two adjustment screws 11 and reference pins 30 shown in FIG. The specific configuration is shown in FIG.
This will be described using (a) to (c).

The reference pin 30 is fitted to a positioning hole (not shown) of the stator substrate 9a, and is fixed to the chassis 3 in a stepped shape so that positioning in the directions of arrows E and E 'can be performed. . One end of the stator substrate 9 a fitted to the stepped portion of the reference pin 30 is fixed to the chassis 3, and the other end is pressed by the pressing spring 20 and attached to the reference pin 30. The two adjustment screws 11 pass through openings (not shown) provided in the stator substrate 9a and pass through the chassis 3
Is screwed into a screw hole of the chassis 3 through an opening of a leaf spring 10 having one end fixed to the screw hole. Thereby, the stator substrate 9a is configured to be attached to the chassis 3 via the leaf spring 10.

Therefore, by loosening or tightening these two adjustment screws 11, the stator substrate 9a
Can be adjusted with the reference pin 30 as a fulcrum.

A detection switch 2 for detecting the initial position of the optical pickup 4 is provided on the stator substrate 9a.
3 are provided.

Projections 3i and 3j are formed from the left and right sides of the front end of the chassis 3 when viewed in the direction of arrow C, respectively.
A positioning shaft 12 having a contact surface 12a on one protrusion 3i and a positioning shaft 13 having a contact surface 13a on the other protrusion 3j are implanted. A substrate 28 on which three detection switches 24 are mounted is attached to one of the protrusions 3i and 3j, here, the protrusion 3j. Based on the combination of the detection results of the three detection switches 24, The type of the optical disk (not shown) housed and mounted in the case is detected.

Further, side walls 3k are formed vertically on both sides of the chassis 3 as viewed from the arrow C, and convex portions 3g, 3 are formed on a part of the top end surfaces of these side walls 3k.
h is formed. These support portions 3g and 3h, together with the positioning shafts 12 and 13, determine the position of the cartridge case in the thickness direction.

FIG. 1 is a side view showing a state in which the cartridge case 2 is mounted in this embodiment, viewed from the same direction as FIG. 3, wherein the cartridge case is shown in a sectional view and the tray is shown. Not. The parts corresponding to the above-mentioned drawings are denoted by the same reference numerals.

6, the cartridge case 2 has the structure shown in FIG. 6, and when the cartridge case 2 is mounted, fitting holes 2a and 2b formed in the bottom surface 2d of the cartridge case 2 are provided. The positioning shafts 12 and 13 (only the positioning shaft 12 is shown) are fitted into the fitting holes 2a and 2b, respectively.
Contact surfaces 1 of these positioning shafts 12 and 13 around the
2a and 13a (FIGS. 2 and 4) are in contact with each other, and a support portion 3 provided on the top end surfaces of both side walls 3k of the chassis 3 is provided.
g and 3h are in contact with the bottom surface 2d of the cartridge case 2.

As described above, in this embodiment, the position of the cartridge case 2 in the thickness direction is determined by the contact surfaces 12 a and 13 a of the positioning shafts 12 and 13 provided on the chassis 3.
And the support portions 3g and 3h, the tray 25 has no relation to the positioning of the cartridge case 2 in the thickness direction. The position in the thickness direction of the optical disk 1 in the cartridge case 2 is determined by the position in the thickness direction of the turntable 8 attached to the chassis 3 as in the conventional technique described with reference to FIG.

Here, the straight line connecting the centers of the positioning shafts 12 and 13 is used as a reference position, and the position of the straight line connecting the vertices of the support portions 3g and 3h is determined by the cartridge case 2 in order to stably support the cartridge case 2. The support portions 3g and 3h are formed in the cartridge case 2 having the outer dimensions shown in FIG.

FIG. 5 is a view showing the mounting operation of the cartridge case 2 in this embodiment. Reference numeral 25c denotes an opening, and portions corresponding to those in the preceding drawings are denoted by the same reference numerals.

In FIG. 4A, the support portions 3g and 3h (only the support portion 3g is shown) are provided on the chassis 3 so that the support portions 3g and 3g are provided on the bottom of the tray 25. An opening 25c (only one of which is shown) for 3h is provided. Other configurations are shown in FIG.
This is the same as the related art described in the above.

Now, when the cartridge case 2 is placed on the mounting surface 25a of the tray 25 drawn out from the inside of the housing 22 and a predetermined operation is performed, the tray 25 on which the cartridge case 2 is mounted moves in the direction of the arrow. Then, the cartridge case 2 is transported into the housing 22. The tray 25
When the driving force is transmitted from a tray driving member (not shown) to a rack gear (not shown) provided on the back surface thereof, the can move in the direction of arrow A or A '. At this time, the chassis 3 is pivoted downward about the pivot point 3f, whereby the tray 25 can move without any hindrance.

When the tray 25 reaches a predetermined position shown in FIG.
7 is pressed against the mounting surface 25a of the tray 25 by a cartridge case retainer 26 provided on the tray 7.

When a detector (not shown) detects the state shown in FIG. 5B, a driving member (not shown) moves the rotation pin 21 fixed to the chassis 3 upward, thereby moving the chassis 3 to the rotation fulcrum 3f. Pivoting upwards to the center, FIG.
The state shown in FIG.

In this state, the optical disk 1 is placed on a turntable 8 fixed to the rotating shaft of the spindle motor 9 and clamped, and the positioning shafts 12 and 13 provided on the chassis 3 are opened by the opening of the tray 25. The fitting hole 2a of the cartridge case 2 through the portion 25b;
2b are fitted, and the cartridge case 2 is positioned in the X and Y directions (FIG. 6). Also, the positioning shaft 1
The contact surfaces 12a and 13a of FIGS. 2 and 13 (FIGS. 2 and 4) are in contact with the bottom surface 2d of the cartridge case 2, and the support portions 3g and 3h of the chassis 3 are also connected to the opening 25c of the tray 25.
And comes into contact with the bottom surface 2d of the cartridge case 2 to be in the state shown in FIG. Thereby, positioning in the Z direction (FIG. 6), which is the thickness direction of the cartridge case 2, is performed.

As described above, the cartridge case 2 has the contact surfaces 12 a, 13 of the positioning shafts 12, 13.
Since the whole is lifted from the contact surface 25a of the tray 25 by the support member 3a and the support portions 3g and 3h, positioning in the thickness direction is performed, and the mounting surface 25a of the tray 25 has no relation to such positioning. Such positioning is not affected by sliding components such as the tray 25, and is determined by the accuracy of the contact surfaces 12a, 13a of the positioning shafts 12, 13 with the chassis 3 and the support portions 3g, 3h, thereby minimizing variations in component dimensions. Can be suppressed. Therefore, a gap between the optical disk 1 and the inner wall of the cartridge case 2 can be accurately secured and held.

Here, using the cartridge case 2, the perpendicularity between the optical axis of the light beam emitted from the optical pickup 4 and the recording or reproducing surface of the optical disk 1 in the state shown in FIG. can do. That is, as described with reference to FIGS.
Although the inclination of the stator substrate 9a with respect to the surface of the chassis 3 can be adjusted, the stator substrate 9a is formed integrally with the spindle motor 9, and the turntable 8 is fixed to the rotation shaft of the spindle motor 9. Thus, the inclination of the recording or reproducing surface of the optical disk 1 mounted can be adjusted by using the adjusting screw 11, whereby the perpendicularity between the optical axis of the light beam and the recording or reproducing surface of the optical disk 1 can be adjusted. It can be set with high precision.

This is because, as described above, if the positioning of the cartridge case 2 can be set with high precision, the inclination of the optical disk in the cartridge case 2 can be further adjusted by adjusting the perpendicularity. Thus, the gap between the optical disc 1 and the inner wall of the cartridge case 2 can be set as desired with higher accuracy.

Further, since the perpendicularity can be adjusted in this manner, the rubbing between the optical disk 1 and the inner wall of the cartridge case 2 can be easily confirmed, and the assembly process of the apparatus can be simplified. That is, if the inclination of the rotation axis of the turntable 8 is changed by such adjustment, it is possible to confirm by sound or the like that the optical disk in the cartridge case 2 begins to rub against the inner wall of the cartridge case. , The start of rubbing in each direction is detected, and from this, the amount of tilt adjustment that determines the perpendicularity between the optical axis of the light beam and the recording or reproducing surface of the optical disk 1 is determined. Can be. Since such adjustment of the squareness can be easily performed, it is not necessary to pay strict attention to the squareness when assembling the apparatus, and the adjustment of the squareness may be performed by the adjustment work.

In addition, together with the mounting operation of the cartridge case 2 or after the mounting, the detection switch 2
4 (FIG. 2), the type of the optical disk 1 is detected, and recording or reproduction according to the type is performed.

The embodiment of the present invention has been described above, but the present invention is not limited only to this embodiment. For example, in the above embodiment, the support portions 3g and 3h are formed integrally with the chassis 3, but they may be attached to the chassis 3 as separate members.

It is apparent that the positioning of the cartridge case 2 in the X, Y, and Z directions in the present invention can be applied to a cartridge case of a disk other than an optical disk such as a magnetic disk.

[0054]

As described above, according to the present invention,
The positioning of the mounted cartridge case is performed by the positioning member and the support member provided on the chassis, and the positioning is performed regardless of the tray on which the cartridge case is mounted and conveyed. The types of members can be reduced. Therefore, it is possible to minimize the influence of the dimensional variation of the parts on the positioning and to improve the positioning accuracy of the cartridge case, and to reduce the distance between the disc-shaped recording medium rotating during recording or reproduction and the inner wall of the cartridge case. An accurate gap can be reliably secured.

[Brief description of the drawings]

FIG. 1 is a side view showing a mounted state of a cartridge case in an embodiment of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a plan view showing components inside a housing of the embodiment shown in FIG. 1;

FIG. 3 is a side view as viewed from an arrow B side in FIG. 2;

FIG. 4 is a front view as viewed from an arrow C side in FIG. 2;

FIG. 5 is a view showing a cartridge case mounting operation of the embodiment shown in FIG. 1;

FIG. 6 is a perspective view showing an example of a cartridge case containing an optical disk.

FIG. 7 is a diagram showing a cartridge case mounting operation of an example of a conventional recording / reproducing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Optical disk 2 Cartridge case 2a, 2b Fitting hole 2c Opening 2d Bottom surface 3 Chassis 3f Rotating fulcrum 3g, 3h Supporting part 4 Optical pickup 8 Turntable 9 Spindle motor 9a Stator substrate 10 Leaf spring 11 Adjusting screw 12 Positioning shaft 12a 13a Contact surface 21 Rotating pin 22 Housing 25 Tray 25a Mounting surface 25b, 25c opening

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsumi Nishijima 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Visual Information Media Division of Hitachi, Ltd. (72) Inventor Ikuo Nishida Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa No. 292 Hitachi, Ltd. Video and Information Media Division (72) Inventor Juichiro Nagai 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture, Japan Multimedia System Development Headquarters, Hitachi, Ltd. (72) Inventor Hitoshi Takizawa Kanagawa 292 Yoshida-cho, Totsuka-ku, Yokohama-shi

Claims (5)

[Claims] 1. A cartridge case accommodating a disk-shaped recording medium and provided with a plurality of positioning means is externally mounted at a first position and transported to a second position.
A tray for mounting the recording medium in a state where information can be recorded or reproduced at a position, and a chassis having a movable support structure, and fitted on the chassis to the positioning means of the cartridge case. A positioning member having a contact surface with the bottom surface of the cartridge case, a turntable for mounting the recording medium in the cartridge case and rotating the recording medium by rotation of a motor, and the rotating recording medium A recording / reproducing apparatus provided with a pickup means for recording or reproducing information on the chassis, wherein the chassis is provided with a support member for supporting the cartridge case together with the positioning member in contact with a bottom surface of the cartridge case. A recording / reproducing apparatus characterized by the above-mentioned. 2. The recording / reproducing apparatus according to claim 1, wherein the support member is formed integrally with the chassis. 3. The device according to claim 1, wherein the support member is 87 mm to 10 mm from the reference position with a straight line connecting the centers of the two positioning members as a reference position.
A recording / reproducing apparatus characterized in that the position is set within a range of 8 mm. 4. The recording / reproducing apparatus according to claim 1, wherein the tray is provided with an opening through which the support member penetrates. 5. The recording / reproducing apparatus according to claim 1, further comprising means for adjusting a tilt of a rotation axis of the turntable.