JP2854690B2 - Shutter opening and closing mechanism for optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention is used for an optical disk drive for recording and reproducing information on an optical disk recording medium housed in a cartridge. The present invention relates to a shutter opening / closing mechanism for an optical disk drive that opens and closes a shutter provided in a camera.

(Prior Art) In recent years, optical disks having a large recording density, a large capacity, and excellent random access have been widely used. An optical disk drive is used for recording and reproducing information on and from an optical disk.

In the optical disk drive, a drive is disposed in a housing-shaped main body, and a cartridge containing an optical disk is inserted into the drive, and the drive is mounted on a turntable connected to a spindle motor of the drive. The optical disk is engaged and the optical disk is driven.

On the other hand, in a cartridge containing an optical disk, an opening is formed on one side of the cartridge when the optical disk is used on one side, and openings are formed on both sides of the cartridge when the optical disk is used on both sides. This opening is opened and closed by a shutter. This shutter is
When the cartridge is not inserted into the optical disk drive main body, the opening is closed. When the cartridge is inserted into the main body, the cartridge is opened by a shutter opening / closing mechanism provided in the driving device and driven by an insertion operation of the cartridge into the driving device.

Conventionally, the shutter opening / closing mechanism has been a mechanism for moving a shutter from an opening by a cartridge insertion operation, so that it has been a complicated link mechanism or a large-scale mechanism.

Further, when opening the shutters formed on both sides to open the openings formed on both sides of the cartridge, the shutter opening / closing mechanism has a more complicated configuration.

In addition, the thickness of a cartridge having an opening on both sides of a cartridge is different from that of a cartridge having an opening on one side. A cartridge having an opening on both sides records and reproduces information on both sides of an optical disc. As a result, the thickness of the cartridge for storing the optical disk used on both sides increases.

In addition, a cartridge having an opening formed on one side has a small thickness because the optical disk uses only one side, and a cartridge for storing the optical disk is thin.

However, since the optical disk drive into which the cartridge is inserted is formed so as to correspond to the cartridge having a certain thickness, for example, a shutter opening / closing mechanism configured exclusively for a thin cartridge requires opening the shutter of the thick cartridge. Can not do. In addition, a shutter opening / closing mechanism configured exclusively for a thick cartridge cannot open the shutter of a thin cartridge. Therefore, there is a disadvantage that different types of cartridges cannot be used.

(Problems to be Solved by the Invention) As described above, the mechanism is complicated if the shutter opening / closing engagement portion is provided close to the side surface of the cartridge. In some cases, reliable operation of the shutter opening / closing mechanism is hindered. To prevent this, a method of taking a sufficient size in the thickness direction of the cartridge so as not to interfere with the operation of the left and right shutter opening / closing mechanisms can be considered, but this hinders miniaturization.

Further, there is a problem that it is impossible to cope with cartridges having different thicknesses.

In view of the above, the present invention provides a shutter opening / closing device for an optical disk drive that has a simple configuration, can be miniaturized, can reliably open a shutter, and can open a shutter of a cartridge having a different thickness. The purpose is to do.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, according to the invention described in claim (1), the invention is used for an optical disk drive for driving an optical disk, and the optical disk is housed therein. An optical disk drive shutter opening / closing mechanism for opening / closing an opening of a cartridge, the shutter opening / closing mechanism being disposed on the front side in the cartridge insertion direction within the optical disk drive, and engaging with a shutter of the cartridge inserted into the optical disk drive. A first sliding means and a second sliding means for opening and closing the shutter by inserting the cartridge into the optical disk drive, and a first sliding means and a second sliding means. Regulating means for regulating only one of the engagement pieces of the second sliding means to engage with the shutter. That.

In the invention according to claim (2), a detecting means which operates depending on the shape of the cartridge when the cartridge is inserted into the optical disk drive device is provided, and the regulating means operates in conjunction with the detecting means. It is characterized by.

The invention according to claim (3) is characterized in that the detecting means operates depending on the thickness of the cartridge.

According to the invention described in claim (4), there is provided a shutter opening / closing mechanism for an optical disk drive, which is used in an optical disk drive for driving an optical disk and opens and closes an opening of a cartridge in which an optical disk is stored. First moving linearly with each other in a substantially opening / closing direction of the shutter;
And second sliding means, and first and second sliding means provided on the first and second sliding means and engaging with the shutter when the cartridge is inserted into the optical disk drive. An engagement piece, and first and second levers slidably disposed in the optical disc drive so as to be rotatable forward in the cartridge insertion direction and slidably supporting the first and second sliding means. The first and second levers are turned by the insertion operation of the cartridge, and the first or second sliding means opens the shutter by this turning movement.

(Operation) According to the first aspect of the present invention, the cartridge inserted into the optical disk drive is provided with the first sliding means and the second sliding means disposed on the front side in the insertion direction of the cartridge. One of the engagement pieces of the moving means abuts and engages the front end face.

At this time, the restricting means restricts only one of the first sliding means and the second sliding means to engage with the shutter.

As a result, only the other unrestricted sliding means of the first sliding means and the second sliding means operates to open the shutter.

According to the invention described in claim (2), the detecting means detects the shape of the cartridge inserted into the optical disk drive, and regulates the operation of the regulating means. That is, the restricting means is operated in accordance with the shape of the cartridge, and one of the first sliding means and the second sliding means is engaged with the shutter depending on the type of the cartridge.

According to the invention described in claim (3), the operation of the regulating means can be regulated in accordance with the thickness of the cartridge, whereby, for example, when a thin cartridge is used as a different cartridge, one of the engagements is performed. Only one piece engages and opens the shutter.

According to the invention described in claim (4), the first and second levers are rotated by the insertion operation of the cartridge, and the first and second sliding means are moved to the shutter by utilizing the rotational movement. The shutter can be opened by sliding in the opening and closing directions.

At this time, since the sliding means is provided so as to be slidable in the shutter opening and closing direction, the engaging state when engaging the engaging piece provided on the sliding means with the shutter and sliding the shutter is ensured. Can be maintained.

(Example) Next, an example of a shutter opening / closing mechanism for an optical disk drive according to the present invention will be described. 2 to 6 are views of FIG. 1 (a) viewed from below. Fig. 1 (b)
Shows an optical disk drive main body 2. The optical disk driving device main body 2 has a housing shape, in which the driving device 1 is housed, and a cartridge 3 in which an optical disk is housed is inserted into the inside from the insertion opening 2a.

First, the cartridge 3 in which the optical disk 5 driven by the driving device 1 is stored will be described, and then the driving device 1 and the shutter opening / closing mechanism 29 provided in the driving device 1 will be described.

<Cartridge> As shown in FIG. 1, the cartridge 3 has a thin housing shape and contains an optical disk 5 therein. The cartridge 3 has openings 7 on both front and back surfaces (however, only the front opening is shown in FIG. 1 and the rear opening is omitted). These openings 7 can be opened and closed by a slidable shutter 9.

The shutter 9 is slidable in the width direction of the cartridge 3 (the direction of arrow a in FIG. 1). In a normal state, that is, in a state in which the cartridge 3 is not inserted into the driving device 1, the cartridge 3 is positioned at the center in the width direction of the cartridge 3 by the urging force of a spring (not shown) so as to close the opening 7.

As shown in FIG. 1, the cartridge 3 is a cartridge holder inserted into the optical disk drive 1.
It is pushed into 11.

<Drive Device> As shown in FIG. 1, the cartridge holder 11
The cartridge receiving portion 11a is formed in a flat plate shape, and both ends are bent at substantially right angles in the same direction, and then the ends are bent at substantially right angles in the same direction. This cartridge receiving portion 11a
The cartridge 3 inserted in the optical disk drive 1 is inserted above.

Holder pins 11b and 11c project from both sides of the cartridge holder 11 in the horizontal direction. These holder pins 11b, 11c are movably inserted in long holes 13a, 13b and 15a, 15b formed in the pair of side plates 13, 15, respectively. For this reason, the cartridge holder 11
Are slidable in the insertion direction and the extraction direction (arrow b direction) of the cartridge 3.

The pair of side plates 13 and 15 are L-shaped, and are fixed to upper both sides of the base 53. The base 53 is fixed in the main body of the optical disk drive by fixing means (not shown).

Further, rectangular through holes are formed in the four corners of the cartridge holder 11, and from inside the through holes, the cartridge pressing portions of the plate-shaped pressing springs 17a and 17b are provided to protrude toward the cartridge receiving portion 11a. ing. These holding springs 17a, 17
b presses the cartridge 3 inserted between the cartridge receiving portion 11a and the flat portion 12 of the cartridge holder 11 against the cartridge receiving portion 11a. Thus, the cartridge 3 is held in the cartridge holder 11.

A substantially L-shaped detection lever 19 is rotatably supported by a support shaft 21 supported by the flat portion 12 between the holding springs 17a and 17b on the left side plate 15 side. A detection piece 19a is provided at one side end of the detection lever 19. The detection piece 19a is inserted into a notch formed in the flat portion 12 of the cartridge holder 11, and protrudes toward the cartridge receiving portion 11a.

The detecting piece 19a contacts the front end surface of the cartridge 3 inserted into the cartridge receiving portion 11a, and detects the thickness of the cartridge 3.

One end of a tension coil spring 23 is fixed between the detection piece 19a and the shaft 21. The tension coil spring 23 is disposed in a notch 24 formed in the flat portion 12 of the cartridge holder 11, and the other end is fixed to a side portion of the notch 24. Therefore, the detection lever 19 is pressed around the shaft 21 counterclockwise in FIG. 1 by the urging force of the tension coil spring 23.

On the other hand, a step is formed at the other end of the detection lever 19, and an elongated hole 19b is formed at the step. The projection 25a is inserted into the elongated hole 19b. The protrusion 25a is provided at one end of the regulating lever 25.

The regulating lever 25 has a substantially L-shape and is rotatably supported by a support shaft 27. At the other end of the regulating lever 25, a regulating piece 25b penetrating through a rectangular through hole 26 formed in the flat portion 12 of the cartridge holder 11 is provided.

A shutter opening / closing mechanism 29 for opening the shutter 9 that closes the opening 7 of the cartridge 3 is provided on the front side of the cartridge holder 11 in the insertion direction of the cartridge 3.

<Shutter Opening / Closing Mechanism> As shown in FIGS.
A shutter opening / closing mechanism 29 is provided on the front side in the insertion direction of the shutter. This shutter opening / closing mechanism 29 has two sliders 3
1 and 33, and a first lever 35 and a second lever 37 to which these sliders 31 and 33 are connected.

As shown in FIG. 2, the slider 31 has an engagement piece 31b formed in contact with the front side surface 9b of the shutter 9 of the cartridge 3 inserted into the cartridge holder 11, and has a center along the longitudinal direction. A convex portion 31a is formed in the portion. One end of a first lever 35 is connected to a side portion of the slider 31 by a support shaft 39 so as to be relatively rotatable.

The other end of the first lever 35 is rotatably supported on the back side of the cartridge holder 11 by a support shaft 41. Also, the first
One end of the lever 35 is pressed clockwise in FIG. 2 around the support shaft 41 by the urging force of a torsion coil spring 43 fixed at one end to the back side of the cartridge holder 11 (see FIG. 1).

The slider 33 has a shutter 9 of the cartridge 3 at its end.
An engagement piece 33b is formed to abut on the front side surface 9a. On the back side of the slider 33, a concave portion 33a is formed at the center along the longitudinal direction. The protrusion 31 is provided in the recess 33a.
a is inserted. In this state, the slider 31 and the slider 33 are relatively movable along the longitudinal direction. One end of a second lever 37 is rotatably connected to a side of the slider 33 by a support shaft 45.

The other end of the second lever 37 is a spindle 47 and a cartridge holder.
11 is rotatably supported on the back side. The second lever 37 is pressed counterclockwise in FIG. 2 around the support shaft 47 by the biasing force of a torsion coil spring 49 whose one end is supported on the back side of the cartridge holder 11.

Next, the operation of the present embodiment will be described with reference to FIGS.

First, a case where a thick cartridge containing a double-sided optical disc for recording / reproducing information on both sides is inserted into the optical disc drive will be described, and then a thin cartridge containing an optical disc for recording / reproducing information on one side will be described. The case of inserting into the optical disk drive will be described.

<Insertion of Thick Cartridge> A case where the thick cartridge 3 is inserted into the driving device 1 and the shutter 9 is opened will be described.

As shown in FIG. 3A, the cartridge 3 is
It is inserted into the optical disk drive main body 2 shown in FIG. 1 (b) from the insertion opening 2a and then into the cartridge holder 11. When the cartridge 3 is pushed into the cartridge holder 11, the cartridge 3 is pushed by the holding springs 17a and 17b.
Is pressed against the cartridge receiving portion 11a.

When the cartridge 3 is pushed into the cartridge holder 11 as it is, the front side surface 3a of the cartridge 3 comes into contact with the detection piece 19a of the detection lever 19. In this case, the detection piece 19a comes into contact with the front side surface because the cartridge 3 is thick.

When the cartridge 3 is pushed further into the cartridge holder 11, the detection piece 19 a of the detection lever 19 is pressed by the front side surface 3 a of the cartridge 3, and the detection lever 19 is pushed against the urging force of the tension coil spring 23. 3 is rotated counterclockwise in FIG. Slot 19b at the other end of detection lever 19
The regulating lever 25 is also supported by the support shaft 27 by the projection 25a
Around the detection lever 19 in the opposite direction (clockwise in FIG. 3A).

When the cartridge 3 is further pushed into the cartridge holder 11, the detection piece 19a of the detection lever 19 slides on the side surface 3b of the cartridge 3, and the rotation of the detection lever 19 stops.

At this time, when the regulating lever 25 rotates in the opposite direction (clockwise in FIG. 3A) to the detecting lever 19, the regulating piece
25b moves outward (in the direction of the arrow (b) in FIG. 3), and the restricted state is released. That is, when the state of restriction by the restriction piece 25b is released, the second lever 37 is moved outward by the urging force of the spring 49 while maintaining the state of contact with the restriction piece 25b according to the movement of the restriction piece 25b. (The direction of the arrow (b) in FIG. 3).

A slider 33 rotatably connected to the second lever 37 by a support shaft 45 is a fitting portion of the slider 31 rotatably connected to the first lever 35 by a support shaft 39. , And the engagement pieces 31b, 33b of the sliders 31, 33 are arranged substantially symmetrically. That is, when the restriction state by the restriction piece 25b is released, the engagement pieces 31b and 33b are arranged at symmetrical positions, and both of the engagement pieces 31b and 33b are engaged with the shutter 9 of the cartridge 3. Becomes possible.

That is, when the thick cartridge 3 is inserted, one of the engagement pieces 31b, 33b faces the front end face 3a of the cartridge 3 regardless of whether the orientation of the cartridge 3 is front or back when the thick cartridge 3 is inserted. When the cartridge 3 is inserted, the engaging piece 31b or 33b engages with the shutter 9 and can be released.

Instead of detecting the cartridge 3 with the detection lever 19,
The position of the second lever 37 or the slider 33 may be manually set in advance.

Further, when the cartridge 3 is pushed into the cartridge holder 11, the engagement piece 31 a of the slider 31 is engaged with the end surface 9 b of the shutter 9 of the cartridge 3.

When the cartridge 3 is pushed in as it is, the slider 31 is pressed against the front side surface 3a of the cartridge 3, so that the first lever 35 rotates around the support shaft 41 in the direction of arrow (c) in FIG. It starts rotating against the urging force of the torsion coil spring 43 (see FIGS. 3 (a) and 3 (b)).

For this reason, the slider 31 rotatably connected to the first lever 35 by the support shaft 39 is moved rightward in FIG. 3A together with the shutter 9 engaged with the engagement piece 31b. Go to

On the other hand, the engagement piece 33b of the slider 33 rotatably connected to the second lever 37 by the support shaft 45 is pressed by the front side surface 3a of the cartridge 3, and the second lever 37 is supported by the support shaft 47. 3 starts rotating against the biasing force of the torsion coil spring 49 in the direction of arrow (d) in FIG. 3, and the recess 33a of the slider 33 is fitted so that the movement is restricted in one direction. The slider 31 slides on the projection 31a of the slider 31 and moves the engagement piece 33b along the front side surface 9a of the shutter 9. The cartridge 3 that has been pushed in until the shutter 9 is opened is locked by locking means (not shown) to prevent it from jumping out (see FIG. 4).

Next, a case where the cartridge 3 is rotated 180 ° and inserted into the optical disk drive 1, that is, a case where the cartridge 3 is inserted into the optical disk drive 1 with its upside down state explain.

When the cartridge 3 is rotated by 180 ° and inserted into the cartridge holder 11, the cartridge 3 is pressed against the cartridge receiving portion 11a by the pressing springs 17a and 17b, and the front side surface 3a of the cartridge 3 comes into contact with the detection piece 19a of the detection lever 19. When pressed, the detection lever 19 rotates about the support shaft 21 against the urging force of the spring 23, and the other end of the detection lever 19 has a long hole.
The regulating lever 25 is rotated by the projection 25a engaged with 19b.

When the cartridge 3 is further pushed into the cartridge holder 11, the detection piece 19a of the detection lever 19 slides on the side surface 3c of the cartridge 3, and the rotation of the detection lever 19 stops. Further, the second lever 37 is rotated by the urging force of the spring 49, and comes into contact with the restricting piece of the restricting lever 25 which rotates in conjunction with the detection lever 19 when the cartridge 3 is inserted.
The slider 33 rotatably connected to the first lever 35 and the support shaft 39 also slides on the fitting portion of the projection 31a of the slider 31 rotatably connected to the first lever 35 and the support shaft 39. The cartridge 31 is moved, and the respective engagement pieces 31b and 33b of the sliders 31 and 33 are disposed at substantially symmetric positions, and the end face 9b of the shutter 9 of the cartridge 3 and the engagement piece 33b of the slider 33 are moved.
Can be engaged. When the cartridge 3 is pushed into the cartridge holder 11 as it is, the sliders 31 and 33 are pressed by the front side surface 3a of the cartridge 3, so that the first lever 35,
The second lever 37 starts rotating around the support shafts 41 and 47 in the directions shown by arrows (c) and (d) in FIG. 3 against the urging forces of the springs 43 and 49, respectively. Is moved together with the shutter 9 engaged with the engaging piece 33b of the slider 33 rotatably connected to the support shaft 45, and is rotatable about the first lever 35 and the support shaft 39. With the rotation of the first lever 35, the connected slider 31 slides and moves in the concave portion 33a of the slider 33 fitted so that the movement is restricted in one direction. The joint piece 31b moves along the side surface 9a of the shutter 9. The cartridge 3 pushed in until the shutter 3 is opened is locked to the cartridge holder 11 by locking means (not shown) to prevent the cartridge 3 from popping out.

<Insertion of Thin Cartridge> Next, a case where a thin cartridge is inserted into the optical disk drive 1 will be described.

When the thin cartridge 51 is pushed into the cartridge holder 11, the cartridge 51 is pressed against the cartridge receiving portion 11a by the front pressing springs 17a and 17b. When the cartridge 51 is inserted into the back of the cartridge holder 11 as it is, the front side surface 51a of the cartridge 51 does not come into contact with the detection piece 19a of the detection lever 19, and proceeds as it is. ) The first lever 35 which rotates around the support shaft 41 by the force in the direction of the arrow (a) and is locked to a locking piece (not shown) is rotatably connected by the support shaft 39. The end face 53b of the shutter 53 is engaged with the engagement piece 31b of the slider 31. On the other hand, the second lever 37 is a regulating lever 25 which is interlocked with the detection lever 19 to which the urging force of the spring 23 is applied. Is locked at an asymmetrical position rotated in the direction of FIG. 5 (d) as compared with the first lever 35 by the restriction piece 25b.
The engagement piece 33b of the slider 33 rotatably connected with the support shaft 45 with the 37 is moved toward the center of the thin cartridge 51,
The cartridge 51 moves to a position that does not face the concave portion provided in the cartridge 51 (see FIGS. 5A and 5B).

If there is no such action, the engaging piece 33b engages with the concave portion of the thin cartridge 51, and the second lever 37 cannot rotate with the insertion of the disc, so that the thin cartridge
51 cannot be inserted.

Insert thin cartridge 51 into cartridge holder 11
Of the torsion coil spring 43, it rotates in the direction of the arrow (C), and the first lever 35
The slider 31 rotatably connected by the engaging piece 31b
Moves together with the shutter 53 engaged with the shutter. The second lever 37 is rotatably connected to the second lever 37 by a support shaft 45.
Engagement piece 33b of slider 33 that moves in only one direction by fitting with 31a
Abuts against the front side surface 53a of the shutter 53 that has moved, and moves toward the center of the thin cartridge 51 together with the second lever 37 that rotates in the direction of the arrow (d) against the urging force of the torsion coil spring 49. . Until the shutter 53 is opened, the cartridge 11 pushed into the cartridge holder 11 is locked by locking means (not shown) in order to prevent it from jumping out (see FIG. 6).

Thus, in the present embodiment, the sliders 31, 33, the detection lever
19. Since the regulating lever 25, the first and second levers 35 and 37 are provided, and the shutters 9 and 53 are opened, the number of parts can be reduced, and the number of parts can be reduced to the width of the cartridge. And miniaturization becomes possible.

In addition, the shutters of the cartridges having different thicknesses can be opened and closed, respectively, for the optical disk using both sides and the optical disk using one side, so that the compatibility of opening and closing the shutter of the cartridge can be obtained.

[Effects of the Invention] As described above, according to the shutter opening / closing mechanism for an optical disk drive according to the present invention, the shutter can be reliably opened with a simple configuration, miniaturization is possible, and cartridges having different thicknesses can be used. An excellent effect that the shutter can be opened can be obtained.

[Brief description of the drawings]

FIG. 1A is a perspective view showing a driving device and a cartridge containing an optical disk driven by the driving device, and FIG. 1B is a perspective view showing an optical disk driving device main body in which the driving device is disposed. FIG. 2 is a perspective view showing the relationship between the cartridge and the shutter opening / closing mechanism, and FIG.
3 is a rear view showing the relationship between the shutter opening / closing mechanism and the cartridge, FIG. 3B is a front view showing the cartridge and the cartridge holder, and FIG. 4 is a view showing the shutter opening / closing mechanism and the cartridge when the cartridge is completely pushed into the cartridge holder. FIG. 5A is a rear view showing the relationship, and FIG. 5B is a rear view showing the relationship between the shutter opening / closing mechanism and the cartridge when a thin cartridge is pushed into the cartridge holder.
FIG. 6 is a front view when the thin cartridge is pushed into the cartridge holder, and FIG. 6 is a rear view showing the relationship between the cartridge and the shutter opening / closing mechanism when the thin cartridge is completely pushed into the cartridge holder. DESCRIPTION OF SYMBOLS 1 ... Driving device, 3, 51 ... Cartridge 5 ... Optical disk, 7 ... Opening 9, 53 ... Shutter 11 ... Cartridge holder 19 ... Detection lever, 19a ... Detection piece 25 ... Regulation lever, 25a regulating piece 29 shutter opening / closing mechanism 31, 33 slider 35 first lever 37 second lever

Claims (4)

(57) [Claims] 1. A shutter opening / closing mechanism for an optical disk drive, used for an optical disk drive for driving an optical disk, for opening and closing an opening of a cartridge containing an optical disk, wherein the cartridge in the optical disk drive is provided. An engaging piece that is arranged on the front side in the insertion direction and engages with a shutter of the cartridge inserted into the optical disk drive, and that opens and closes the shutter by an insertion operation of the cartridge into the optical disk drive; A first sliding means and a second sliding means; and a regulation for restricting only one of the engagement pieces of the first sliding means and the second sliding means to engage with the shutter. And a shutter opening / closing mechanism for an optical disk drive. 2. The apparatus according to claim 1, further comprising: detecting means which operates depending on the shape of the cartridge when the cartridge is inserted into the optical disk drive, wherein the regulating means operates in conjunction with the detecting means. Item (1): A shutter opening / closing mechanism for an optical disk drive. 3. A shutter opening / closing mechanism for an optical disk drive according to claim 2, wherein said detecting means operates depending on a thickness of said cartridge. 4. A shutter opening / closing mechanism for an optical disk drive for use in an optical disk drive for driving an optical disk, for opening and closing an opening of a cartridge in which the optical disk is stored, wherein the shutter substantially opens and closes a shutter of the cartridge. First and second sliding means linearly moving relative to each other; and provided on the first and second sliding means, wherein the first and second sliding means engage with the shutter when the cartridge is inserted into the optical disk drive. A first and a second engagement piece that is engaged with the first and second engagement pieces; a second engagement piece that is rotatably disposed forward in the cartridge insertion direction in the optical disc driving device and slidably supports the first and second sliding means; A first lever and a second lever, and the first and second levers are inserted by an insertion operation of the cartridge.
A shutter opening / closing mechanism for an optical disk drive, wherein the first or second sliding means opens a shutter by this rotating motion.