JPH0814921B2 - Shutter open / close mechanism for disk cartridges - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention moves to a cartridge main body so as to open and close a signal reading or signal writing opening formed on both upper and lower surfaces of a cartridge main body accommodating a disk such as an optical disk or a magneto-optical disk. The present invention relates to a shutter opening / closing mechanism for a disc cartridge that opens / closes a shutter member that is freely attached.

[0002]

2. Description of the Related Art Conventionally, optical disks and magnetic disks used as signal recording media for recording and / or reproducing apparatuses are:
In order to protect the signal recording surface, the signal recording surface is housed in the cartridge body, and is mounted on the recording and / or reproducing apparatus while being housed in the cartridge body.

A disc cartridge which is constructed by accommodating a disc in the cartridge main body is used for recording and / or recording.
Alternatively, the upper and lower surfaces are provided with openings facing a pickup device such as an optical pickup device that reads or writes information signals when mounted on a reproducing device. In addition, the opening of the disc cartridge is inadvertently opened except when it is mounted in the recording and / or reproducing apparatus, dust is attached to the disc stored in the cartridge body, or the disc is damaged. To prevent this, a shutter member that closes the opening is movably provided.

Therefore, recording and / or recording of a disc player using this type of disc cartridge as a signal recording medium.
Alternatively, the reproducing apparatus is provided with a shutter opening / closing mechanism that opens / closes the shutter member by a mounting operation of the disc cartridge.

[0005]

By the way, in the recording and / or reproducing apparatus using the disc cartridge as the signal recording medium as described above, the disc cartridge is correctly inserted into the device and the shutter member is operated by the shutter opening / closing mechanism. As a result, an opening for reading or writing a signal is opened, and an information signal can be read or written only when the pickup device faces the disk through the opening. Therefore, if the disc cartridge is erroneously inserted and the shutter member is mounted in the recording and / or reproducing apparatus without the shutter opening / closing mechanism being opened, the information signal cannot be read or written.

The shutter member covers the disk table of the disk rotation driving device and the insertion hole exposed by the pressing member for pressing and supporting the disk continuously to the opening for reading or writing the signal. In the disk cartridge formed as described above, if the shutter member is not opened, the disk housed in the cartridge body cannot be chucked in the disk rotation drive device and driven to rotate.

In a recording and / or reproducing apparatus such as a disk player using the above-mentioned disk cartridge as a signal recording medium, the shutter member is opened only when the disk cartridge is properly inserted into the disk. It is necessary to prohibit the mounting of the disc cartridge into the device when the disc cartridge is erroneously inserted and cannot be mounted in the mounting portion.

Therefore, the present invention realizes a reliable movement operation of the shutter member for opening and closing the signal reading or signal writing opening provided in the cartridge main body, and surely by the mounting operation to the recording and / or reproducing apparatus. An object of the present invention is to provide a shutter opening / closing mechanism for a disc cartridge, which enables an opening operation of the opening and further simplifies a moving operation mechanism of a shutter member arranged on the recording and / or reproducing apparatus side. .

Further, the present invention prevents an erroneous insertion such as a disc cartridge being inserted in a state where the shutter member is not opened, or the disc cartridge is inserted in the wrong insertion direction, and the recording and / or reproducing apparatus is prevented. It is an object of the present invention to provide a shutter opening / closing mechanism for a disc cartridge, which can realize protection of the side mechanical portion.

[0010]

In order to achieve the above-mentioned object, a shutter opening / closing mechanism of a disk cartridge according to the present invention has an opening for reading or writing a signal on the upper surface and the lower surface of a cartridge body accommodating a disk. And the upper surface of the cartridge body,
In the shutter member of the disk cartridge including a shutter member attached to the lower surface and the front side surface to open and close the opening, an engaging hole is provided from a part of the front wall of the shutter member to the lower plate. The disk is provided with a projection that is provided so as to face the insertion direction of the disk cartridge and that selectively engages with the engagement hole. One of the projections is engaged with the engagement hole. A pair of shutter opening / closing arms that open and operate the shutter member by being pressed by the cartridge and rotated. Then, the projection of the other shutter opening / closing arm that does not open the shutter member when the disc cartridge is normally inserted is inserted into the concave portion provided on the front side surface of the cartridge body, so that the disc cartridge is mounted at a predetermined insertion position. When the disk cartridge is abnormally inserted, the projection of the other shutter opening / closing arm does not enter the recess and abuts against a stopper provided opposite to the insertion direction of the disk cartridge, whereby the disk cartridge It is designed so as to restrict the mounting at a predetermined insertion position.

[0011]

In the shutter opening / closing mechanism of the disk cartridge according to the present invention, when the disk cartridge is properly inserted, the projection provided on one of the pair of shutter opening / closing arms has the engagement hole formed on the shutter member of the disk cartridge. And the protrusion provided on the other side enters into the recess provided on the front side surface of the cartridge body. Then, the one shutter opening / closing arm having the projection engaged with the engaging hole of the shutter member is pressed by the disk cartridge to move the shutter member in the direction of opening the opening formed in the cartridge body.

When the disc cartridge is inserted in an insertion state other than normal insertion, the other shutter opening / closing arm other than the shutter opening / closing arm whose projection is engaged with the engaging hole provided in the shutter member of the disk cartridge. The projection provided on the front side of the cartridge body is restricted from entering the recess provided on the front side surface of the cartridge body, and the projection abuts a stopper provided opposite to the insertion direction of the disk cartridge to reach a predetermined insertion position of the disk cartridge. Are restricted from being installed.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. Configuration of Disc Cartridge (See FIGS. 2, 3, 4, 5, and 6) First, the disc cartridge 1 applied to the present invention will be described.

As shown in FIGS. 2 and 3, the disk cartridge 1 includes an upper half 2 and a lower half 3 which are formed by molding a synthetic resin, for example, and have a substantially flat plate shape. A cartridge body 5 formed by butting and engaging and fixing with a plurality of screws 4, and a disc-shaped disk 6 provided with signal recording surfaces on both sides rotatably accommodated in the cartridge body 5, for example, a magneto-optical disk. A signal read by an optical pickup for writing an information signal to or reading an information signal from the disc and the disc 6 provided on each of the upper half 2 and the lower half 3 constituting the cartridge body 5. Alternatively, a shutter member 9 movably attached to the cartridge body 5 for opening and closing the signal writing openings 7 and 8 is used as a main component. , It is formed as a double-sided use type.

Upper half 2 constituting the cartridge body 5
The lower half 3 and the lower half 3 are provided at the same position so that the write protection members 10 for prohibiting writing on the disk 6 are mounted in the opposite positions when they are butt-engaged with each other. It is formed symmetrically except for points. The upper half 2 and the lower half 3 are formed so as to form a space sufficient to rotatably accommodate the disc 6 when they are butt-joined to each other.
The left and right side walls 11, 11, the front side wall 12, and the rear side wall 13 of the cartridge body 5 are butt-joined to the peripheral edges of the upper half 2 and the lower half 3 as shown in FIG. The rising walls 11a, 11b, 12 that make up the
a, 12b, 13a, 13b are formed.

Further, in the central portion of the upper half 2 and the lower half 3, a disk rotation driving device provided on the recording and / or reproducing device side for rotating the disk 6 housed in the cartridge body 5. Disc table insertion holes 14 and 15 which are exposed by the disc table, and a signal for continuously exposing the disc table insertion holes 14 and 15 to expose a part of the disc 6 to the outside of the cartridge body 5 in the radial direction. Openings 7 and 8 for reading or writing signals
Has been drilled. That is, these openings 7 and 8 are
The upper halves 2 and 3 are formed in a substantially rectangular shape from the central portion thereof to the front side wall 12 to which the shutter member 9 is attached. The inner surfaces of the upper half 2 and the lower half 3 are abutted against each other on a circle having a diameter slightly larger than the outer diameter of the disk 6 centered on the disk table insertion holes 14 and 15. A plurality of arcuate ribs 16 that form a position restricting wall that restricts the horizontal position of 6 and that also form a disk storage portion are provided in a protruding manner.

A recording and / or reproducing apparatus for the disc cartridge 1 is provided at both corners of the rear side surface of the upper half 2 and the lower half 3 opposite to the front side surface to which the shutter member 9 is attached. The positioning pins provided on the device are fitted to each other when mounted on the device, and two positioning holes 17, 17 and 18, 18 for mounting and positioning are provided to position the positioning pins with respect to a predetermined position where they are planted. Has been.

Then, the rear wall positions near the reference holes 17, 17 and 18, 18 provided in the upper half 2 and the lower half 3 and the rising walls at both corners on the front side where the shutter member 9 is mounted. 11a, 11b, 12a, 12b, 13
In the area surrounded by a and 13b and the arcuate rib 16, screw fixing portions 19, 19 and 19, 19 to which screws 4 for fixing the upper half 2 and the lower half 3 are screwed are respectively provided. One pair is provided.

As described above, the screw fastening portions 19, 19 and 1
The upper half 2 and the lower half 3 provided with the disks 9 and 19 accommodate the disk 6, and the disk 6 fixedly coupled by screwing the screw 4 to the screw fixing portions 19, 19 and 19, 19. The cartridge main body 5 that rotatably accommodates is constructed.

Further, on the outer surface along the front side surface where the openings 7 and 8 of the upper half 2 and the lower half 3 are provided, the openings 7 and 8 are formed.
A slide guide groove 20 that slides a shutter member 9 that opens and closes 8 is provided.

The slide guide grooves 20 are provided on the upper and lower surfaces of the cartridge body 5 so as to face each other.
The shutter member 9 which is slidably attached via the is formed by bending a metal plate such as a stainless plate into a substantially U shape. That is, the shutter member 9 includes an upper shutter plate 22 and a lower plate which are upper plates enough to simultaneously cover the openings 7 and 8 and the disc table insertion holes 14 and 15 on both upper and lower sides of the front wall 21 which is a connecting piece. The lower shutter plate 23 is formed by bending so as to face each other.
Further, the shutter member 9 forms a slide guide portion 24 with respect to the cartridge main body 5 by the side of the front wall 21 connecting the upper shutter plate 22 and the lower shutter plate 23 and the front wall 21. The slide guide portion 24 further extends from one end of the upper shutter plate 22 and the lower shutter plate 23 in the slide guide groove 20 direction. Therefore, the shutter member 9 is formed in a substantially L-shape in plan view.

Guide pieces 25, 25, which are guided by engaging a slide guide groove 20 formed by cutting and raising a part of the slide guide portion 24 of the shutter member 9 to the upper and lower surfaces, respectively. It is provided facing. Also,
A ridge portion 26 formed by drawing is formed between the guide pieces 25, 25, and a thickness caused by forming the slide guide portion 24 to be longer than the width of the upper and lower shutter plates 22, 23. It is designed to prevent bending in the direction.

Further, on one end side of the front wall 21 of the shutter member 9, when the shutter member 9 is in the first position with the openings 7 and 8 closed, the lock member 27 provided on the cartridge body 5 is provided. A bent portion 28 for locking that engages is formed by cutting and raising. Further, the shutter member 9 includes
From the front wall 21, there is provided an engagement hole 29 into which a shutter opening / closing pin, which is a protrusion provided so as to be set up at the tip of each of a pair of shutter opening / closing arms described later provided on the recording and / or reproducing apparatus side, is selectively engaged. It is provided across the lower shutter plate 23 as shown in FIG. That is, the engagement hole 29 is provided by forming an L-shaped cutout from the front wall 21 to the lower shutter plate 23, and the shutter opening / closing pin provided on the shutter opening / closing arm is provided in the thickness direction of the disc cartridge 1. Is formed so as to be orthogonally engaged with. When the shutter member 9 is located at the first position where the shutter member 9 closes the openings 7 and 8 and the disc table insertion holes 14 and 15, the engagement hole 29 is located in the cartridge body 5.
It is provided at a position deviated from the center in the left-right direction of the cartridge body 5 and at a position facing the projection pressed portion 27c on the free end side of the lock member 27 provided at one corner portion on the front surface side of the cartridge body 5. In addition, the engagement hole 2 of the shutter member 9
At the other end of the front wall 21 facing the side where 9 is formed,
When the disc cartridge 1 is inserted and operated, the shutter opening / closing pin that does not engage with the engagement hole 29 that is not used for opening / closing the shutter member 9 can easily ride on the front wall 21 and escape, so that the inward direction can be avoided. A bent tilt guide portion 30 is provided.

The shutter member 9 formed as described above
Is attached so as to cover the front side surface from the upper surfaces of the upper and lower halves 2 and 3 of the cartridge body 5.
Slide guide groove 24 of the cartridge body 5 with which the
It is slidably attached by being guided by. In this way, on the front side surface side of the cartridge main body 5 to which the shutter member 9 is slidably attached, a projection and a cover of a shutter opening / closing arm formed by locating a part of the front side wall 12 inward of the cartridge main body 5. A slide groove 31 on which the lock bent portion 28 slides is provided. The lower half 3 side portion of the slide groove 31 is formed as a notch recess 32 for escaping the shutter opening / closing pin so that a protrusion provided so as to stand upright on the shutter opening / closing arm can enter and slide. There is. The notch recess 32 is formed with a depth sufficient to enter the shutter opening / closing pin so that the shutter opening / closing pin is embedded therein. When the shutter opening / closing pin enters the notch recess 32 through the engaging hole 29, Part of it does not stick out.

Further, the openings 7 and 8 and the disk table insertion hole 1 formed on both upper and lower surfaces of the cartridge body 5.
The sliding range of the shutter member 9 is regulated over the opening 7, 8 and one side of the insertion holes 14, 15 including the peripheral edges of the shutter 4, 15, that is, the side where the slide guide portion 24 of the shutter member 9 does not project. A concave portion 33 is formed. Then, the shutter member 9 has the openings 7, 8 and the disc table insertion hole 14, within the range of the concave portion 33.
It is moved between a first position where the opening 15 and 15 are closed and a second position where the openings 7 and 8 and the insertion holes 14 and 15 are opened.

Furthermore, this disc cartridge 1
As shown in FIG. 4, when the shutter member 9 is located at the first position where the shutter member 9 closes the openings 7 and 8 and the disk table insertion holes 14 and 15, as shown in FIG. A lock member 27, which is formed by molding a synthetic resin and has a lock recess 35 that locks the shutter member 9, engages with the locked bending member 28. The lock member 27 is an elastic displacement portion 27 formed in a semi-circular shape from one side of the attachment base portion 27 a attached to the upper half 3.
The shutter member 9 is moved to one side surface located on the free end side of the lock recess 35 with which the bent portion 28 of the shutter member 9 formed in the middle of one side surface of the projection pressed portion 27c via b is engaged. A concave cutout escape portion 37 through which the bent portion 28 is inserted at the time of operation is provided.

Further, on the front side surface side of the cartridge body 5, there is provided a recess 38 into which the shutter opening / closing pin provided in the other shutter opening / closing arm in which the shutter opening / closing pin does not engage with the engaging hole 29 of the shutter member 9 is inserted. There is. The disc cartridge 1 is normally inserted into the recess 38,
When the shutter opening / closing arm 9 is opened by one of the pair of shutter opening / closing arms that are rotated by the disc cartridge 1, the shutter member 9
The shutter opening / closing pin that is planted in the other shutter opening / closing arm that does not contribute to the operation of is inserted into the shutter opening / closing arm. That is, as shown in FIG. 6, the recess 38 is provided with the shutter member 9
Is operated by one of the shutter opening / closing arms and is provided at a position facing outward when it reaches the second position where the openings 7, 8 and the disc table insertion hole 14.15 are opened,
A shutter opening / closing pin of the shutter opening / closing arm is formed so as to be cut in a part of the upper half 2 on the front side wall 12 side so as to be inserted perpendicularly to the thickness direction of the disk cartridge 1, and the shutter opening / closing pin is inserted. At this time, it is formed so as not to project from the cartridge body 5.

Structure on the side of recording and / or reproducing device (see FIGS. 1, 7 and 8) Next, the structure on the side of the recording and / or reproducing device into which the disk cartridge 1 having the above-mentioned structure is inserted and mounted. explain.

Although not shown, a reference hole 1 provided in the disc cartridge 1 is provided in the recording and / or reproducing apparatus.
7, 17 or 18 and 18 are provided with height positioning pins for positioning the mounting position of the disc cartridge 1 and support pins for supporting the flat surface of the disc cartridge 1, and the disc cartridge 1 is provided in the horizontal direction and the height direction. A disc mounting portion 41 that is positioned and mounted is configured. Further, as shown in FIG. 1, in the disc mounting portion 41, a disc rotation drive device 43 having a disc table 42 for rotationally driving the disc 6 in the disc cartridge 1, and the disc 6 is synchronized with the disc table 42. A chucking device or the like (not shown) for sandwiching the disk 6 on the disk table 42 so that the disk 6 can be integrally rotated is provided. Further, the disc cartridge 1 mounted in the disc mounting portion 41 is disposed so as to face the lower surface side of the disc cartridge 1 and is moved along the radial inner and outer peripheries of the disc 6 to write an information signal on the signal recording surface of the disc 6. An optical pickup device 44 is provided for performing the above operation and reading the written information signal.

Then, the disc cartridge 1 which is inserted into the disc mounting portion 41 formed inside the device through a disc insertion / removal opening provided in an outer casing which constitutes the main body of the device.
A cartridge support frame 45 that supports the cartridge is disposed. The cartridge support frame 45 is vertically movably supported on a chassis in which mechanical parts such as a disk rotation drive device 43 and a pickup device 44 are provided. The cartridge support frame 45 arranged in this way is
It is formed in a flat plate shape having substantially the same width as the disc cartridge 1,
A cartridge support portion 46 having a U-shaped cross section, into which both side portions of the disk cartridge 1 are inserted and supported,
47 are provided facing each other. The front side of the cartridge support frame 45 is the disk cartridge 1
An opening 48 for receiving is formed. The cartridge support frame 45 is supported with the opening 48 facing the disc insertion / ejection opening when the disc cartridge 1 is inserted and removed, and the disc cartridge 1 is moved over the positioning pins and the support pins when the disc cartridge 1 is mounted. It is mounted on the chassis so as to be vertically movable so as to be supported in the lowered position.

A pair of first and second shutter opening / closing arms 5 are provided on the inner side of the cartridge supporting frame 45 facing the receiving opening 48 of the disc cartridge 1, facing the insertion direction of the disc cartridge 1.
1, 52 are provided. The first and second shutter opening / closing arms 51 and 52 are cylindrical shaft insertion portions 55 that are inserted into support shafts 53 and 54 that are erected on both inner sides of the cartridge support frame 45 at their base ends. , 56 are provided, and first and second shutter opening / closing pins 57, 58 which selectively engage with the engaging holes 29 provided in the shutter member 9 of the disk cartridge 1 are set up at the tips, and the shafts are inserted. From the parts 55, 56 to the first and second opening / closing pins 57, 5
It is formed with the same length up to 8.

The support shafts 53 and 54 are erected at symmetrical positions with respect to the center of rotation of the disk rotation drive device 43, which is the center of insertion of the disk cartridge 1.
Then, the first and second shutter opening / closing arms 51, 52
Is configured such that the first and second shutter opening / closing pins 57 and 58 are projected in opposite directions so that the shaft insertion portions 55 and 56 are attached to the support shaft 5.
It is rotatably attached by being inserted through 3, 54. In this way, the pair of first and second shutter opening / closing arms 51, 52 having the same length to be mounted via the support shafts 53, 54 symmetrical about the insertion center of the disc cartridge 1
Are to be mounted symmetrically around the insertion center of the disc cartridge 1.

When the first and second shutter opening / closing arms 51 and 52 are rotated about the respective support shafts 53 and 54 toward the opposite sides, the first and second shutter opening / closing arms 51 and 52 are planted at the tip ends in the middle of the rotation. First and second shutter opening / closing pins 57, 58
Are formed to have overlapping lengths.

Further, the first and second shutter opening / closing arms 51, 52 do not contact the opening / closing arms 51, 52 with the disk cartridge 1 when the disk cartridge 1 is inserted. 57,
Since 58 is engaged with the engagement hole 29 of the shutter member 9, it is attached to the support shafts 53, 54 at a distance larger than the thickness of the disc cartridge 1 in the height direction.

Further, the first and second shutter opening / closing pins 57 and 58 are formed with a length long enough to engage with the engaging hole 29 provided in the shutter member 9 of the disc cartridge 1 to be inserted. . As shown in FIG. 8, the first and second shutter opening / closing pins 57 and 58 are rotated when the first and second shutter opening / closing arms 51 and 52 are simultaneously rotated on the same plane of the disk cartridge 1. The first and second shutter opening / closing pins 57 and 58 are formed with a height that cannot be abutted at the overlapping positions of the rotation loci.

The first and second shutter opening / closing arms 51, 52 mounted as described above are spring-locked so as to project from the shaft insertion portions 55, 56 so as to be substantially orthogonal to the shutter opening / closing arms 51, 52. Tension springs 60 stretched between the shafts 59, 59 are urged to rotate outward on both sides of the cartridge support frame 45, which are directions away from each other.
Then, the first shutter opening / closing arm 51 is set up at the tip when the first signal recording surface of the disk 6 is inserted so as to face the optical pickup device 44 with the upper surface of the disk cartridge 1 facing upward. The rotation biasing position is regulated by the first arm regulating piece 61 so that the first shutter opening / closing pin 57 is located at a position facing the engaging hole 29 of the shutter 9. In addition, the second shutter opening / closing arm 52
When the second signal recording surface of the disk 6 is inserted so that the lower surface of the disk cartridge 1 faces upward and the second signal recording surface of the disk 6 faces the optical pickup device, the second shutter opening / closing pin 58 erected at the front end of the disk cartridge 1 causes the shutter member 9 The rotation urging position is regulated by the second arm regulating piece 62 so as to be located at a position opposed to the engaging hole 29.

The first and second arm restricting pieces 6 are located at both inner sides of the cartridge supporting frame 45.
1, the disk cartridge 1
A pair of disc cartridge insertion restricting protrusions 63, 63 for restricting the inserting position of the disc are erected. The disc cartridge 1 is inserted until it comes into contact with the insertion regulation protrusions 63, 63, whereby the shutter member 9 moves from the first position to the second position by the first or second shutter opening / closing arms 51, 52. Then, the signal reading or signal writing openings 7 and 8 are completely opened.

Further, a pair of first and second shutter opening / closing arms which are pressed and rotated by the inserted disk cartridge 1 are provided on the inner side of the disk mounting portion 41 facing the insertion direction of the disk cartridge 1. 51,5
The second or first shutter opening / closing pin 58 or 57 provided on the other shutter opening / closing arm 52 or 51 which does not contribute to the opening / closing of the shutter member 9 among the two does not enter the recess 38 of the cartridge main body 5 and When rotated while projecting onto the front side wall 12 or the rear side wall 13, the second or first shutter opening / closing pin 58 or 5
7 collides, and the first and second shutter opening / closing arms 51,
A stopper 64 is provided which prevents the rotation of 52 and restricts the mounting of the disc cartridge 1 at a predetermined insertion position.

Shutter member 9 of disk cartridge 1
Opening Operation of Next, the opening operation of the shutter member 9 by the shutter opening / closing mechanism having the pair of first and second shutter opening / closing arms 51 and 52 configured as described above will be described.

Opening operation when the disc cartridge 1 is inserted with the first surface of the disc 6 facing the optical pickup device (see FIGS. 1, 7, 9 and 10) First, as shown in FIG. When the disc cartridge 1 is inserted from the disc insertion / ejection opening with the optical pickup device facing the first signal recording surface of the disc 6 with the upper surface of the disc cartridge 1 facing upward, as shown in FIGS. 7 and 8. The first shutter opening / closing pin 57 at the tip of the first shutter opening / closing arm 51 engages with the engagement hole 29 of the shutter member 9. At this time, the first shutter opening / closing pin 57
By pressing the pressed portion 27c of the lock member 27 provided in the cartridge body 5 to displace the lock member 27, the locked bent portion 28 is disengaged from the lock recess 35 of the lock member 27, and the shutter member 9 is released. Can be slid.

On the other hand, the second shutter opening / closing pin 58 at the tip of the second shutter opening / closing arm 52 rides on the inclined guide portion 30 formed at the other end of the shutter member 9 to reach the second shutter opening / closing arm 52.
The shutter opening / closing arm 52 of FIG. 7 precedes the first shutter opening / closing arm 51 and resists the biasing force of the tension spring 60.
It is rotated in the direction of the middle arrow A. That is, the second shutter opening / closing arm 52 is rotated in advance by the amount by which the first shutter opening / closing pin 57 on the first shutter opening / closing arm 51 side is engaged with the engagement hole 29. When the disc cartridge 1 is further inserted in this state, the disc cartridge 1 is pressed to rotate the first shutter opening / closing arm 51 in the direction of arrow B in FIG. 7 against the biasing force of the tension spring 60. Start. At this time, since the first shutter opening / closing pin 57 is engaged with the engagement hole 29 of the shutter member 9 and the shutter member 9 is unlocked, the first shutter opening / closing arm 51 is rotated. As the shutter member 9 is moved, the shutter member 9 is opened,
8 and the disc table insertion holes 14 and 15 are rotated from the first position to the second position side where the openings 7 and 8 and the disc table insertion holes 14 and 15 are opened. Then, when the disk cartridge 1 is further inserted and inserted until it abuts on the insertion restriction protrusions 63, 63, the shutter member 9 is completely moved to the second position by the first shutter opening / closing arm 51, as shown in FIG. Then, the openings 7 and 8 and the disc table insertion holes 14 and 15 are opened.

On the other hand, the second shutter opening / closing arm 52 rotated prior to the first shutter opening / closing arm 51 slides the shutter opening / closing pin 58 on the front wall 21 from the inclined guide portion 30 of the shutter member 9. While being rotated, the shutter member 9 is moved to the second position where the openings 7 and 8 and the disc table insertion holes 14 and 15 are opened. Enter the recess 38.

That is, when the disc cartridge 1 is normally inserted and the shutter member 9 completely opens the openings 7 and 8 and the disc table insertion holes 14 and 15,
The shutter opening / closing pin 58 of the second shutter opening / closing arm 52 that does not contribute to the operation of the shutter member 9 enters the recess 38 without colliding with the stopper 64, and the disc cartridge 1 abuts on the insertion restricting protrusions 63, 63. The first and second shutter opening / closing arms 5 inserted up to
1 and 52 are rotated to be mounted to a predetermined insertion mounting position.

When the disc cartridge 1 is mounted to the predetermined mounting position, the cartridge support frame 45 that supports the disc cartridge 1 is lowered to the disc rotation drive device 43 and the pickup device 44, and the disc 6 is loaded. The disc 6 is clamped and supported on the disc table 42 so that the disc 6 can be rotated.

Opening operation when the disk cartridge 1 is inserted with the second surface of the disk 6 facing the optical pickup device. Further, the lower surface of the disk cartridge 1 faces upward, and the second surface of the disk 6 is optically picked up. When the disc cartridge 1 is inserted so as to face the device, the second shutter opening / closing arm 52 is reversed, contrary to the case where the first surface of the disc 6 faces the optical pickup device described above.
The second shutter opening / closing pickup 58 at the tip engages with the engaging hole 29 of the shutter member 9, and the first shutter opening / closing pin 57 at the tip of the first shutter opening / closing arm 51 is formed at the other end of the shutter member 9. The vehicle is in a state of riding on the tilt guide portion 30. Then, the first shutter opening / closing arm 5
1 is rotated against the biasing force of the tension spring 60 prior to the second shutter opening / closing arm 52.

Then, when the disc cartridge 1 is inserted until it abuts on the insertion regulating protrusions 63, 63, the shutter member 9 is moved to the second position by the second shutter opening / closing arm 52, and the openings 7, 8 and the disc table. The insertion holes 14 and 15 are completely opened, and the first shutter opening / closing arm 51 is rotated while sliding the shutter opening / closing pin 59 on the front wall 21 from the inclined guide portion 30 of the shutter member 9, and the shutter member is opened. It enters into the concave portion 38 of the cartridge body 5 which is covered by 9.

The other operation is the same as the operation of the first shutter opening / closing arm 51 and the second shutter opening / closing arm 52 when the first surface of the disk 6 is inserted so as to face the optical pickup device. The detailed description is omitted here.

Shutter of disc cartridge is not open (see FIG. 11) Further, even if the first surface or the second surface of the disk 6 faces the pickup device and is inserted from the shutter member 9 side, the first shutter opening / closing arm A first shutter opening / closing pin 57 protruding from the tip of the first shutter 51 or a second shutter opening / closing pin 5 protruding from the front of the second shutter opening / closing arm 52.
When 8 is inserted into the disc mounting portion 41 without engaging with the engaging hole 29 of the shutter member 9, the shutter opening / closing arms 51 and 52 both move the shutter opening / closing pins 57 and 58. It is rotated while being ridden on the front wall 21 of. Then, the shutter opening / closing pin 57 or 58 of the other shutter opening / closing arm 51 or 52 that does not contribute to the opening / closing of the shutter member 9.
Also, since the shutter member 9 is not opened, it cannot enter the recess 38, and the shutter opening / closing pin 5 is inserted before the disc cartridge 1 abuts on the insertion restricting protrusions 63, 63.
7 and 58 come into contact with the stopper 64, the mounting of the disc cartridge 1 at a predetermined insertion mounting position is prohibited, the disc rotation driving device 44 is prevented from being dropped, and the disc 6 is sandwiched and supported on the disc table 42. Is prohibited.

Further, the disc cartridge 1 is inserted from the shutter member 9 side, and the first shutter opening / closing arm 5 is inserted.
The first shutter opening / closing pin 57 at the tip of No. 1 or the second shutter opening / closing pin 58 at the tip of the second shutter opening / closing arm 52 engages with the engagement hole 29 of the shutter member 9 to the inner side of the disc mounting portion 41. Shutter member 9
Is moved in the second position direction for opening the openings 7 and 8 of the disc cartridge 1 and the disc table insertion holes 14 and 15, but as shown in FIG. If the shutter member 9 is not completely moved to the second position due to the removal of the shutter member or the like, the concave portion 38 provided on the front surface side of the cartridge main body 5 will have the shutter member 9
The shutter opening / closing pin 57 or 58 of the other shutter opening / closing arm 51 or 52 which does not contribute to the opening / closing of the shutter member 9 remains covered with a part of the concave portion 3
8, the shutter opening / closing pins 57 and 58 come into contact with the stopper 64 before the disk cartridge 1 comes into contact with the insertion regulating projections 63, 63, so that the disk cartridge 1 can be mounted at a predetermined insertion mounting position. Forbidden, the disc rotation drive device 44 is prevented from being dropped into the disc rotation drive device 44, and the disc 6 is prohibited from being sandwiched and supported by the disc table 42.

Incorrectly inserted disk cartridge (see FIG. 1)
2) Further, the disk cartridge 1 is moved to the shutter member 9
If the wrong insertion is performed from the rear side surface facing the mounting side of the shutter member 9 without inserting the shutter member 9 from the side, the shutter member 9 is inserted without any movement operation. 2 shutter opening / closing arms 51, 5
2 is the first and second shutter opening / closing pins 57, 5 at each tip
8 is mounted on the flat rear side wall 13 of the disc cartridge 1 and rotated while being kept in contact with the flat side wall 13. Then, the shutter opening / closing pins 57 and 58 of any one of the shutter opening / closing arms 51 and 52 cannot be inserted into the cartridge main body 5, and are mounted on the flat rear side wall 13 of the disc cartridge 1 and left protruding. As shown in FIG. 12, the shutter opening / closing pin 5 is inserted before the disc cartridge 1 comes into contact with the insertion regulation protrusions 63, 63.
7 and 58 come into contact with the stopper 64, and the mounting of the disc cartridge 1 at a predetermined insertion mounting position is prohibited.

[0051]

As described above, in the shutter opening / closing mechanism of the disc cartridge according to the present invention, when the disc cartridge is inserted in an insertion state other than normal insertion,
The protrusion provided on the other shutter opening / closing arm other than the shutter opening / closing arm having the protrusion engaged with the engaging hole provided on the shutter member of the disk cartridge is restricted from entering the concave portion provided on the front side surface of the cartridge body. When the projection is abutted against the stopper provided opposite to the insertion direction of the disc cartridge, the mounting of the disc cartridge at the predetermined insertion position is restricted, so that the shutter member is not opened. Therefore, it is possible to surely prevent erroneous insertion such as a disc cartridge being inserted or an erroneous insertion direction, and it is possible to protect the disc cartridge and the recording and / or reproducing apparatus side mechanical unit.

When the disc cartridge is inserted in a normal insertion state, a reliable movement operation of a shutter member for opening and closing a signal reading or signal writing opening provided in the cartridge body is realized, and recording is performed. And / or the opening operation of the opening can be surely performed by the mounting operation to the reproducing device.

[Brief description of drawings]

FIG. 1 is a perspective view showing a shutter opening / closing mechanism of a disc cartridge according to the present invention.

FIG. 2 is a perspective view from the upper surface side of a disk cartridge applied to the present invention.

FIG. 3 is an exploded perspective view of the disc cartridge.

FIG. 4 is a plan view showing the inner surface side of the upper half of the disk cartridge.

FIG. 5 is a perspective view from the lower surface side of the disc cartridge.

FIG. 6 is a perspective view of the disc cartridge with a shutter member opened.

FIG. 7 is a plan view showing a state where a disc cartridge is inserted into the shutter opening / closing mechanism according to the present invention.

FIG. 8 is a front view showing first and second shutter opening / closing arms.

FIG. 9 is a perspective view showing a state where the disk cartridge is brought into contact with and engaged with first and second shutter opening / closing arms.

FIG. 10 is a plan view of the disc cartridge with the shutter member opened.

FIG. 11 is a plan view of the shutter member of the disc cartridge in an unopened state.

FIG. 12 is a plan view showing a state where the disc cartridge is inserted from the rear side surface side.

[Explanation of symbols]

 1 Disc Cartridge 5 Cartridge Body 6 Disc 7, 8 Opening 9 Shutter Member 12 Front Side Wall 13 Rear Side Wall 14, 15 Disc Table Insertion Hole 22 Upper Shutter Plate 23 Lower Shutter Plate 38 Recess 51 for Shutter Opening / Closing Pin First Shutter opening / closing arm 52 Second shutter opening / closing arm 57 First shutter opening / closing pin

Claims (1)

[Claims] 1. An opening for reading or writing a signal is formed on an upper surface and a lower surface of a cartridge main body accommodating a disk, and the opening is attached to an upper surface, a lower surface and a front side surface of the cartridge main body. An engaging hole is provided in the shutter member of the disc cartridge including a shutter member that opens and closes from a part of the front wall of the shutter member to the lower plate, and is provided so as to oppose in the insertion direction of the disc cartridge. Each of the protrusions has a protrusion that selectively engages with the engaging hole, and one of the protrusions is pressed by the disc cartridge and is rotated while being engaged with the engaging hole. A shutter opening / closing arm for opening and closing the shutter member is provided, and the shutter portion is provided when the disc cartridge is normally inserted. When the protrusion of the other shutter opening / closing arm does not open, the protrusion of the other shutter opening / closing arm is inserted into the concave portion provided on the front side surface of the cartridge main body, so that the disc cartridge can be mounted at a predetermined insertion position. The projection of the other shutter opening / closing arm does not enter into the concave portion and abuts against a stopper provided so as to face the insertion direction of the disc cartridge so as to regulate the mounting of the disc cartridge at a predetermined insertion position. The shutter opening / closing mechanism of the disk cartridge made.