JPH0430708Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention will be explained in the following order.

A: Industrial application field B: Conventional technology C: Problem that the invention attempts to solve D: Means for solving the problem E: Effect F: Example F-1 Configuration of disk cartridge (1st A
(Figures to Figures 2B) F-2 Shutter mounting structure (Figures 3 and 4) F-3 Shutter abutment regulation part (Figure 5) F-4 Other examples of shutter abutment regulation part ( (Figure 6) F-5 Disk support device (Figures 1A and 1B) F-6 Shutter and support member drive mechanism (Figures 1A, 1B, and 7) F-7 Drive to disk player Mounting operation G: Effect of the invention A Industrial application field The present invention is a disk cartridge in which a disk is rotatably stored in the cartridge and is mounted on a disk player to record and/or play back the disk. In particular, the present invention relates to a cartridge having a shutter for opening and closing an opening provided in the cartridge.

B. Conventional technology Traditionally, draw discs (DRAW/DISC)
2. Description of the Related Art A disk cartridge is known in which a disk that can be written (recorded) and read (reproduced) by an optical method or a magneto-optical method is rotatably housed in the cartridge.

Disks stored in this type of disk cartridge must be reliably protected from scratches and dust. Therefore, this disk cartridge has a shutter in which a part of the disk faces outward in the radial direction and an opening where a pick-up for writing and reading faces is closed except when it is installed in a disk player. is provided. This shutter is attached via a sliding member slidably attached to a guide shaft provided on the front side of a cartridge containing a disk. and,
A sliding operation is performed in synchronization with the mounting operation of the disc cartridge on the disc player, and an opening operation is performed to open the opening. Furthermore, when the cartridge is removed from the disc player, the shutter is moved back by a return mechanism provided within the cartridge main body to close the opening.

C. Problems that the invention aims to solve By the way, the cartridge body that houses the disk is molded from synthetic resin for ease of manufacture, and the shutter is made of a thin metal plate such as a stainless steel plate for strength and other reasons. It is formed by bending. The shutter opens and closes the opening by sliding the slide recesses provided on both the upper and lower surfaces of the cartridge body, but when the shutter reaches the position to close the opening, it comes into contact with one side of the slide recess. , a part of the synthetic resin cartridge body is scraped off to generate shavings. In particular, since one side of the slide recess that comes into contact with the shutter when it reaches the position where it closes the opening is located near the opening, shavings may fall into the cartridge body and adhere to the disc stored here, causing the disc to close. There is also a risk that the signal recording surface of the device will be contaminated, resulting in signal loss during recording and reproduction.

Further, the appearance of the cartridge body is spoiled due to the scraping caused by the contact of the shutter as described above.

Therefore, the present invention prevents the shutter from coming into contact with the cartridge body when the lid is closed as described above, and even when the cartridge body is made of synthetic resin and the shutter is made of metal, the cartridge body is The object of the present invention is to provide a disk cartridge that ensures disk protection by eliminating scraping and preventing the generation of shavings.

D. Means for Solving the Problems The disk cartridge according to the present invention includes a cartridge body composed of a pair of upper and lower halves for rotatably storing a disk, and an opening provided in the cartridge body from which a pick-up is exposed. a shutter that slides parallel to the front end of the cartridge body between a closed position in which the opening is closed and an open position in which the opening is open; a slide recess provided in the plane of the cartridge body corresponding to the range of movement of the shutter between the closed position and the open position; and a guide portion attached to the shutter and provided near the front end of the cartridge body. A disc cartridge comprising: a sliding member that is guided by the shutter and slides integrally with the front end of the cartridge body in parallel with the front end of the cartridge body; and urging means that urges the shutter toward a closed position that closes the opening. , when the shutter is in the closed position that closes the opening, the end of the shutter on the closed position side is prevented from coming into contact with the cartridge body, and the slide recess is at a position on the closed position side that overlaps with the slide recess. The above-mentioned object is achieved by providing an abutment regulating portion for positioning on one or both of one end side of the sliding member and one side of the front end side of the cartridge body.

E Effect In the disk cartridge according to the present invention,
The shutter moves within a sliding recess provided in the plane of the cartridge body over a range of movement between a closed position and an open position.

When the shutter is moved to the closed position where the opening is closed, the end of the shutter on the closed position side is restricted from contacting the cartridge body by the contact regulating portion, and overlaps with the slide recess. This closes the opening of the cartridge body.

F. Embodiments Hereinafter, embodiments of the disk cartridge of the present invention will be described based on the drawings. In this embodiment, a disk called a draw disk (DRAW-DISC) that can be written (recorded) and read (reproduced) by an optical method, a magneto-optical method, etc. is used.

F-1 Configuration of disk cartridge (1st A)
(Fig. 2B) First, as shown in Fig. 1A, Fig. 1B, and Fig. 2A, the disk cartridge rotates the disk 5 into the cartridge main body 4, which consists of upper and lower halves 2 and 3 molded from synthetic resin. It is freely stored horizontally, and the upper and lower halves 2 and 3 are fitted from above and below and fixed with screws or the like. This disk cartridge is constructed as a so-called A and B double-sided disk cartridge in which recording surfaces are formed on both the upper and lower surfaces of the disk 5.

Next, the upper and lower halves 2 and 3 have a pair of upper and lower circular central openings 7a corresponding to the center hole 6 of the disk 5;
7b, and rectangular front openings 8a, 8b (see FIGS. 1A and 1B) facing a pair of upper and lower writing and reading pick-ups that are continuous with the center openings 7a, 7b. . Note that both front openings 8a and 8b are provided at the center position in the left-right direction on the front end side of the cartridge main body 4.
Further, the horizontal position of the disk 5 is regulated by, for example, a large number of ribs 9 integrally provided on the inner surface of the lower half 3. Furthermore, a pair of left and right guide grooves 10a and 10b with a substantially U-shaped cross section are provided at both left and right ends of the cartridge body 4, which are used when the cartridge body 4 is attached to a disc player (not shown). A pair of left and right positioning pin insertion holes 11a and 11b are provided at both ends for inserting and positioning a pair of left and right positioning pins (not shown) inside the disc player. Further, a pair of left and right notches 12a and 12b are provided at both left and right ends of the rear end of the cartridge 4, which are used when automatically loading and ejecting the cartridge into a disk player. .

F-2 Shutter mounting structure (Figures 3 and 4) Next, open and close the pair of upper and lower front openings 8a and 8b as shown in Figures 1A, 1B, 3, and 4. The mounting structure of the shutter 14 will be explained.

First, the shutter 14 is formed of a metal plate such as a stainless steel plate, and has a substantially U-shaped cross section, and has a side that connects the upper and lower shutter plates 15a and 15b together at the side. It is configured by a face plate 16. and,
At the front end of the cartridge body 4, the upper and lower halves 2 and 3
A guide shaft 18 is installed horizontally in the middle portion 17 of the guide shaft 18, and a sliding member 19 made of synthetic resin or the like is slidably attached to the guide shaft 18.
Note that the front end side 19a of the sliding member 19 is exposed outside the upper and lower halves 2 and 3. Further, a shutter 14 is fitted into both upper and lower planes of the upper and lower halves 2 and 3 on the front end side of the cartridge main body 4, and the shutter 1
A pair of upper and lower slide recesses 20a and 20b on which the upper and lower shutter plates 15a and 15b of 4 slide are provided.

These slide recesses 20a, 20b are formed continuously with the openings 8a, 8b so as to surround the openings 8a, 8b, as shown in FIG.

Next, when installing the shutter 14, insert the shutter 14 to the outside of the front end of the cartridge 4 from the direction of arrow a shown in FIG. 2, and as shown in FIG. Fits into the slide recesses 20a and 20b.
After this, a pair of left and right screws 22 are inserted into a pair of left and right screw insertion holes 22a provided in the side plate 16 of the shutter 14, and the side plate 16 is moved by the screws 22 to the front side surface 19a of the sliding member 19. Fasten with screws. In this case, both screws 22 may be self-tapping, or a pair of metal nuts may be insert-molded when the sliding member 19 is molded from the synthetic resin.

As described above, the shutter 14 attached to the sliding member 19 is guided by the guide shaft 18 to the closed position shown in FIG. in the left-right direction between the position where the lid is closed from above and below) and the open position shown in FIG. It is opened and closed by sliding in the directions of arrows b and c.

F-3 Shutter Contact Regulation Portion (Fig. 5) By the way, in the disk cartridge according to the present invention, one end of the sliding member 19 to which the shutter 14 is attached, that is, the shutter 14 is located at the front opening 8a, 8b is closed, one side 1 of the intermediate portion 17 of the cartridge body 4 is reached.
As shown in FIG. 5, an abutment regulating portion 21 is provided on the side opposite to the cartridge body 7a, protruding from one side of the shutter 14 and regulating the abutment of the shutter 14 to the cartridge body 4. The above contact regulating part 21
is a width W ₂ that is slightly wider than the width W ₁ of the shutter 14
The sliding member 19 is formed with a protruding portion that protrudes from one side of the shutter 14 when the shutter 14 is attached. Also,
The amount of protrusion of the contact regulating portion 21 from one side of the shutter 14 is determined by the width of the stepped portions 8c and 8d along one side of the front openings 8a and 8b of the slide recesses 20a and 20b.
It is considered to be smaller than W ₃ .

By providing the contact regulating portion 21 as described above, when the shutter 14 is closed, one side of the shutter 14 is provided with the slide recesses 20a and 20b.
Before the sliding member 19 comes into contact with the rising surfaces of the stepped portions 8c and 8d, the sliding member 19 slides over the intermediate portion 17 of the cartridge body 4.
The slide is regulated by coming into contact with one side 17a.
Therefore, the shutter 14 is connected to the cartridge body 4.
Never come into contact with.

At this time, one side of the shutter plates 15a, 15b of the shutter 14 is connected to the slide recesses 20a, 2.
The front opening 8 is located on the steps 8c and 8d of 0b.
a and 8b are completely closed.

F-4 Another example of the contact regulating part of the shutter (Fig. 6) Furthermore, the above-mentioned contact regulating part 21 is provided on the inner surface of the lower half 3 constituting the cartridge body 4, as shown in Fig. 6. You can. That is, one side of the shutter plates 15a and 15b is located in the slider recess 2.
0a, 20b and closes the front openings 8a, 8b, but the steps 8c, 8
A protrusion is provided so as to abut one end of the sliding member 19 and restrict sliding at a position that does not abut the rising surface of d.

Alternatively, the contact regulating portion 21 may be provided on each of the sliding member 19 and the lower half 3 as described above.

F-5 Disk Support Device (FIGS. 1A and 1B) Next, the disk 5 support device within the cartridge body 4 will be described.

First, as shown in FIGS. 1A and 1B, four supporting members 24a to 24d are installed at four corners of the lower half 3 to support four locations on the outer periphery 5a of the disk 5.
is installed. These support members 24a~
As shown in FIG. 7, 24d is a support part 25 having a substantially U-shaped cross section and a fan-shaped gear 26 integrally provided therein. It is inserted into four fulcrum shafts 28 that are integrally provided at the four corners of 3.
These supporting members 24a to 24d are rotated at a rotation angle θ of approximately 90° between the supporting position and the non-supporting position with respect to the outer periphery 5a of the disk 5, respectively, as shown by the arrows e and f.
It is configured to be rotatable in the direction.

Next, according to the support device for the disk 5 configured as described above, when the disk cartridge is not in use such as during storage, all four support members 24a to 24d are aligned with the arrow e as shown in FIG. 1A. direction and moved to the support position, and is inserted above and below the outer periphery 5a of the disk 5, and the pair of upper and lower support pieces 25
Between a and 25b, four locations 5a on the outer periphery of the disk 5 are sandwiched and supported from above and below. As a result, the disk 5 has the upper and lower halves 2 and 3 as shown in FIG. 2A.
It is supported in a floating state at an intermediate position between the upper and lower halves 2 and 3, with a gap between the upper and lower sides with respect to the inner surface of the housing.

When the disk cartridge is attached to the disk player, all four supporting members 24a to 24d are rotated in the direction of arrow f and moved to the non-supporting position, as shown in FIG. 1B, and the outer circumference 5 of the disk 5 is
a, and the support for the disk 5 is released. Then, as shown in FIG. 2B, the disk cartridge is attached to a predetermined cartridge attachment position in the disk player by the cartridge attachment member 39, and the central opening 7a of the upper and lower halves 2, 3 is opened.
Turntable 40 inserted into 7b from above and below
The peripheral portion of the center hole 6 of the disk 5 is clamped from above and below by the clamper 41 and the clamper 41 .

F-6 Shutter and support member drive mechanism (Figures 1A, 1B, and 7) Next, the shutter 14 and the four support members 24
The drive mechanisms of a to 24d will be explained.

First, as shown in FIG. 1A, FIG. 1B, and FIG.
A pair of left and right sliding members 43a, 43b made of synthetic resin or the like are attached to the front end sides of 0a, 10b so as to be slidable in the directions of arrows g and h, which are the front and rear directions. A pair of parallel racks 45a, 45b are integrally provided inside the sliding members 43a, 43b. Also, there is a rack 4 on the inside of the sliding member 19 to which the shutter 14 is attached.
6 are integrally provided. Of the four supporting members 24a to 24d, one pair on the left and right 24a and 24
b, 24c and 24d are a pair of left and right links 47a,
47b. In addition,
In this case, both links 47a and 47b are also symmetrical, and both front and rear ends of these links are connected to the support member 24a.
, 24b, 24c, and 24d are pivotally connected to each of the fan-shaped gears 26 via a pair of pins 48a, 48b.

Then, the rack 45a of one sliding member 43a
and the sliding member 1 to which the shutter 14 is attached.
9 racks 46 are shown in Figures 1A, 1B and 7.
As shown in the figure, they are connected by a gear train 50 consisting of four gears 49a to 49d. Furthermore, the rack 45a of one sliding member 43a and the fan-shaped gear 26 of the support member 24a on one side and on the front side are interlocked via gears 49a and 49e.

In addition, the rack 45b of the other sliding member 43b and the fan-shaped gear 26 of the support member 24c on the other side and the front side are connected to two gears 53a, as shown in FIGS. 1A, 1B, and 7. 53b. Another gear 55 is meshed with a gear 53c arranged between the two gears 53a and 53b.

A pair of torsion springs 57a and 57b are attached to the gear 49 disposed in the middle of the gear train 50 and the gear 55 meshed with the gear train 54.

That is, as shown in FIGS. 8 and 9, the gears 49c, 55 are integrally formed with a boss 58 inserted into the outer periphery of the support shafts 51a, 56a, and an annular rib 59 provided on the outer periphery of the upper surface. An annular recess 6 is provided between the boss 58 and the rib 59.
0 is formed. On the other hand, both torsion springs 57a, 5
7b is formed of, for example, a torsion coil spring or a spiral spring, and these torsion springs 57a, 57
A coil-shaped torsion acting portion 61 b is wound around the outer periphery of the boss 58 within the recess 60 . One end 62a of these torsion springs 57a, 57b is locked to a spring locking portion 63 provided on the gears 49c, 55, and the other end 62b is locked to the inner surface 3b of the lower half 3, for example.
It is locked by a spring locking part 64 such as a pin provided integrally with the.

Then, due to the torsional repulsion force by the torsion acting portion 61 of both the torsion springs 57a, 57b, both gears 49c,
55 is urged to rotate in the direction of arrow i in FIG. 1A. The rotational force of these gears 49c, 55 is transmitted to the sliding members 43a, 43 via gear trains 50, 54.
racks 45a, 45b and 46 of b and 19;
The force is transmitted to the fan-shaped gears 26 of both the support members 24a and 24c, and the pair of left and right sliding members 43a and 43b are urged to slide in the direction of the arrow h in FIG. Arrow b in Figure 1A
The pair of left and right support members 24a and 24b on the front side are urged to rotate in the direction of arrow e in FIG. 1A.

Note that the pair of left and right support members 24a, 2 on the rear side
4b is linked to the pair of left and right support members 24a, 24b on the front side by a pair of links 47a, 47b, so the pair of left and right support members 24a, 24b on the rear side also follow the arrow e in FIG. 1A. is urged to rotate in the direction.

Next, according to the drive mechanism configured as described above, when the disk cartridge is not in use, such as during storage, both sliding members 43
a and 43b are slid in the direction of arrow h and moved back toward the front end of the cartridge body 4. In conjunction with this, the shutter 14 is slid in the direction of arrow b and returned to the closed lid position, and both front openings 8a and 8b are closed by both shutter plates 15a and 15b, as shown in FIG. has been done. At this time, as described above, the contact regulating portion 21 at one end of the sliding member 19
is one side 17a of the intermediate portion 17 of the cartridge body 4.
The shutter 14 is in contact with the cartridge body 4.
The backward movement position is restricted so as not to come into contact with the front openings 8a and 8b, as shown in FIG.

In addition, similarly to this, four supporting members 24a to 2
4d is rotated in the direction of arrow e in FIG. 1A, and the second
As shown in Figure A, the disk 5 is supported in a floating state at an intermediate position between the upper and lower halves 2 and 3.

F-7 Installation operation into the disk player Next, the disk cartridge is installed into the disk player and used. At this time, as shown in Figure 1B, the disk cartridge is inserted horizontally into the disk player in the direction of arrow j. When inserted, the pair of left and right release protrusions 67a and 67b provided inside the disc player engage the pair of left and right guide grooves 10a and 10b of the cartridge 4 and the sliding grooves 44a and 4.
4b. Then, both of these release protrusions 67a, 67b are connected to the pair of left and right sliding members 4.
3a, 43b in the direction of arrow g against the spring force of both torsion springs 57a, 57b, both racks 45a,
45b drives both gear trains 50,54.

That is, one rack 45a rotates gear 49a of gear train 50 in the direction of arrow k. Then, the gears 49c and 49d are rotated by the gear 49b in the directions of arrows m and n, respectively, the rack 46 is driven by the gear 49c, and the shutter 14 is slid in the direction of the arrow c via the sliding member 19, as described above. As described above, the cartridge main body 4 is moved to the open position, and both front openings 8a and 8b of the cartridge main body 4 are opened. At the same time, one support member 24a on the front side is rotated in the direction of arrow f by the gear 49e via the fan-shaped gear 26, and one link 47a is slid in the direction of arrow o to support the other support member on the rear side. The member 42b is also rotated in the direction of arrow f. The other rack 47b rotates the gear 53a of the gear train 54 in the direction of the arrow q, and the other support member 24c on the front side is rotated in the direction of the arrow f by the gear 53b via the sector gear 26, and the other link 47b is moved in the direction of arrow r, and the other support member 24d on the rear side is also rotated in the direction of arrow f. In this way, the four supporting members 24
a to 24d are simultaneously rotated in the direction of arrow f, and the support of the disk 5 is released. At this time, the gear 55 is rotated in the direction of arrow s by the gear 53c. As the gears 49c and 55 rotate in the directions of the arrows m and s, the torsion acting portions 61 of the torsion springs 57a and 57b are brought into contact with the outer periphery of the boss 58, as shown by dashed lines in FIGS. 8 and 9. The shutter 14 and the sliding members 43a, 43b, 4 are twisted up and changed to a small diameter state, and the shutter 14 and the sliding members 43a, 43b, 4 are attached to both the torsion springs 57a and 57b.
All the return forces of the supporting members 24a to 24d are charged.

After the disk cartridge has been inserted in the direction of arrow j in FIG. 1B, the disk cartridge is inserted into the cartridge mounting member 3 as shown in FIG. 2B.
The disk 5, which has been mounted at a predetermined cartridge mounting position by 9 and released from support by the four supporting members 24a to 24d, is mounted on the turntable 40, and a pickup (for recording and/or playback) is mounted on the turntable 40. (not shown) is inserted, for example, into the front opening 8b on the lower half 3 side and brought close to the lower recording surface of the disk 5. After that, the turntable 40 rotates the disk 5 into the upper and lower halves 2 and 3.
At the same time, the head scans the lower recording surface of the disk 5 in the radial direction, thereby performing desired recording or reproduction on the lower recording surface.

Then, after recording or playing back the disk 5, the first
As shown in FIG.
0b and both sliding grooves 44a, 44b in the direction of arrow h. Then, both torsion springs 5
Due to the spring force charged in 7a and 57b, both sliding members 43a and 43b are moved back in the direction of arrow h, and in conjunction with this, the shutter 14 is moved in the direction of arrow b.
At the same time, both front openings 8a and 8b are closed again by being slid in the direction and returned to the closed position.
The supporting members 24a to 24d are simultaneously rotated in the direction of the arrow e, and the disk 5 is again moved to the upper and lower halves 2,
It is supported in a floating state at an intermediate position between the top and bottom of 3.

G. Effects of the invention As described above, in the disk cartridge according to the invention, when the shutter that opens and closes the opening provided in the cartridge body is moved to the closed position where the opening is closed, the closed position side of the shutter The end portion of the cartridge body is prevented from coming into contact with the cartridge body by the abutment regulating portion, so that the cartridge body is prevented from being scraped off by the shutter. Since it is possible to prevent the cartridge body from being scraped off, even if the cartridge body is made of synthetic resin and the shutter is made of metal, it is possible to reliably suppress the generation of scraped powder from the cartridge body due to this shutter. This prevents the shavings from adhering to the disk.

Further, the shutter moves within a slide recess provided in the plane of the cartridge body over a range of movement between a closed position and an open position, and when moved to a closed position that closes the opening,
Since the end of the shutter on the closed position side overlaps with the slide recess provided in the cartridge body to close the opening, it is possible to reliably prevent dirt from entering the cartridge body.

Furthermore, since the shutter extends into the slide recess provided in the plane of the cartridge body, it is prevented from protruding from the plane of the cartridge body, so that it may be accidentally moved due to getting caught, etc. The opening can be reliably closed without any problems.

In this manner, the generation of abrasive powder from the cartridge body is prevented and the opening is securely closed, so that the disks housed in the cartridge body can be securely protected.

[Brief explanation of the drawing]

1A and 1B are plan views showing the disk cartridge according to the present invention when not in use and when in use, with the upper half of the cartridge removed;
Figure 2A is a view taken along the line A-A in Figure 1A, and Figure 2B is a view taken along line A-A in Figure 1A.
The figures are a view taken along the line B--B in Figure 1B, Figure 3 is an exploded perspective view showing the mounting structure of the shutter to the cartridge, Figure 4 is an enlarged view taken in the direction of Figure 1A - line arrows, and Figure 5 is FIG. 6 is a front view of the shutter in the closed position, showing another embodiment of the present invention, and FIG. 7 is a view of the shutter shown in FIG. Enlarged view, Figure 8 is the first
FIG. 9 is an enlarged view of FIG. 8 in the direction of the arrows. 4...Cartridge body, 5...Disk, 5
a...Outer periphery, 8a, 8b...Front opening, 14...
...Shutter, 19...Sliding member, 20a, 20
b...Slide recess, 21...Abutment regulating part.

Claims (1)

[Scope of Claim for Utility Model Registration] A cartridge body composed of a pair of upper and lower halves for rotatably storing a disk, an opening provided in the cartridge body from which a pick-up is exposed, and a front end of the cartridge body. a shutter that slides in parallel to move between a closed position in which the opening is closed and an open position in which the opening is open; a slide recess provided on the plane of the cartridge body corresponding to a movement range extending over the range; and a guide portion provided near the front end of the cartridge body to which the shutter is attached, so that the cartridge body can move integrally with the shutter. A disk cartridge having a sliding member that slides parallel to a front end of a cartridge main body, and a biasing means that biases the shutter toward a closed position that closes the opening, wherein the shutter closes the opening. When the shutter is in the closed position, the slider slides an abutment regulating part that prevents the end of the shutter on the closed position side from coming into contact with the cartridge main body, and also positions the slide recess at a position on the closed position side that overlaps the slide recess. A disk cartridge provided on one or both of one end side of the member and one side of the front end side of the cartridge main body.