JPH08287638A - Disk cartridge - Google Patents

Abstract

PURPOSE: To prevent the play of a disk and to eliminate dusts generated in a case by providing a stopper in the end of a slider and bringing this into contact with the outer periphery of the disk during unuse so as to fix the disk in the case. CONSTITUTION: A slider 4 is freely slidably attached to one end of a case 1A. The slider 4 is pressed in the front end direction of the slider by a spring 5 provided between the slider and the case 1A. A stopper is provided in the pressing direction of the spring 5 and the rear end of the slider 4 in its opposite side. When a cartridge is unloaded from a disk device and windows 11 and 21 are closed, the stopper is brought into contact with the outer periphery of a disk 3 by means of the movement of the slider 4 and the disk 3 is fixed in the case 1A. Thus, the play of the disk 3 is prevented during unuse and dusts generated in the case is further reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly, to a disk cartridge capable of preventing rattling of the disk when not in use and further reducing dust in the case. It is a thing.

[0002]

2. Description of the Related Art As is well known, disk cartridges are
An information recording medium mainly composed of a case formed as a substantially rectangular flat box body and a disk as a recording medium enclosed in the case, and recording information magnetically or optically. Further, a window for writing information to the disc or reading the information from the disc is opened on the surface of the case, and such a window is closed by a shutter when not in use to prevent dust from entering. . The shutter is mounted on a slider slidably attached to one side edge of the case and biased in one direction by a spring.

[0003]

By the way, the dust adhering to the surface of the disk not only enters from the outside but also
It also occurs inside the case, and the generation of such dust is
It may cause a seek error. That is, the disc in the case is relatively loosely enclosed due to the compatibility with various drive mechanisms in the disc device, and there is appropriate rattling in the case, which causes a problem that dust is generated from the case itself.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent rattling of a disk when not in use and to further reduce dust generation in a case. The present invention is to provide a disc cartridge.

[0005]

DISCLOSURE OF THE INVENTION A disc cartridge of the present invention is formed as a flat box having a substantially rectangular shape, and a case in which a window is opened on its board surface, and a disc as a recording medium enclosed in the case. A slider that is slidably attached to one side edge of the case and is urged in one direction by a spring; and a shutter that is attached to the slider to open and close the window. A stopper is provided at the end of the slider on the side opposite to the urging direction of (1), which comes into contact with the outer peripheral edge of the disk when the window is closed.

[0006]

[Operation] The stopper provided at the end of the slider is
When the window is closed, it abuts against the outer peripheral edge of the disk to fix the disk in the case and prevent collision with the inner surface of the case.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk cartridge according to the present invention will be described with reference to the drawings. FIG. 1 is a development view showing the structure of the disk cartridge of the present invention. FIG. 2 is a plan view showing the internal structure of each of two shells as a case used in the disc cartridge of the present invention. FIG.
FIG. 4 is a plan view of a main part inside a shell showing a slider and its operation. FIG. 4 is a plan view of a main part inside the shell showing the slider and its operation. FIG. 5 is a side view showing the structure of the slider. FIG. 6 is a view on arrow AA in FIG. 5, and is a rear view showing the shape of the rear end portion of the slider. 7 is a BB arrow view in FIG. 6, and is a cutaway view showing the internal structure of the slider rear end portion. FIG.
FIG. 7 is a sectional view taken along the line C-C in FIG. 6, showing the internal structure of the slider rear end portion and the stopper.
FIG. 9 is a plan view showing the structure of the pressing plate at the lower end of the shutter. FIG. 10 is a rear view of the pressing plate and is a diagram showing a planar shape of the adhesive layer provided on the pressing plate. Figure 11
FIG. 6 is an explanatory diagram showing a method of attaching a shutter to a slider. Hereinafter, in this embodiment, the disk cartridge is abbreviated as "cartridge".

As shown in FIG. 1, the cartridge of the present invention is substantially the same as the conventional cartridge, and is formed as a flat box having a substantially rectangular shape, and the windows (11) and (21) are formed on the board surface thereof. An opened case (1A),
It is mainly composed of a disk (3) as a recording medium enclosed in the case.

The case (1A) is constructed by laminating two shells (1) and (2) each having a substantially rectangular thin plate shape. The shell (1) is a member forming the back side of the cartridge, and a window (11) for exposing the recording area and the drive hub on the back surface of the disk (3) is opened in the shell. The shell (2) is a member forming the front side of the cartridge, and a window (21) for exposing the recording area on the surface of the disc (3) is opened in the shell. Note that the reference numeral (7) is the same as in FIG.
The knob for opening and closing the write-protection hole (27) shown in (3) is shown. By arranging the knob (7) in the space partitioned by the corners of both shells (1) and (2), , The shell (1) can be operated from the knob operation hole (17).

The shells (1) and (2) are integrally manufactured by injection molding a thermoplastic resin such as polycarbonate. As shown in FIGS. 1 and 2, on the inner surfaces of the shells (1) and (2), there are integrally provided girders and the like for forming an appropriate internal space when these are bonded together. The disk (3) is provided with arc-shaped ribs (12), (1) on the inner surfaces of the shells (1), (2).
2) and the ribs (22), (22), etc. are housed with a proper gap in a substantially end-column cylindrical space.

The disk (3) shown in FIG. 1 is, for example, an optical disk, and as is well known, the disk usually has a groove by injection molding a polycarbonate resin using a mold equipped with a stamper. A transparent circular substrate is prepared, and a dielectric layer, a magneto-optical recording layer, a light reflecting layer made of metal, a protective layer made of an ultraviolet curable resin, and the like are sequentially provided on the substrate. At the center of the disc (3) is provided a drive hub that is attracted and held by a magnet clamp when loaded in the disc device.

Further, as shown in FIGS. 1 and 3, a slider (4) is slidably attached to one side edge of the case (1A). That is, in the slider (4), the projections provided on both sides of the rear end of the slider (4) have the groove (16) at the edge of the shell (1) and the groove (2 at the edge of the shell (2) shown in FIG.
6) slidably engaged with the guide ribs provided on both sides of the front end of the guide rib (1) at the edge of the shell (1).
Guide ribs (25) on the inner wall surface of 5) and on the edge of the shell (2)
Is slidably locked by the inner wall surface of the.

The slider (4) comprises a shell (1),
Although it is slidably engaged with (2), sliding is performed smoothly by making the contact portion between the slider (4) and the shells (1), (2) a rough surface and reducing the friction coefficient. You can also The rough surface is formed on one or both of the contact surfaces of the slider (4) and the shells (1), (2). Examples of the method for forming the rough surface include a graining process using an electric discharge process, a blasting process (sandblasting process), a honing process for polishing with particles, and an electric discharge machining process. These roughening treatments are usually
It is applied to the surface of a molding die for forming the slider (4) or the shells (1) and (2), and the above is applied to the surface of the molded product (the surface of the cartridge body or the fitting portion of the slider). The above process may be directly performed after molding. As the degree of such roughening treatment, Rmax of the treated surface is 5 to 5.
The range of 50 μm, preferably 10 to 30 μm is suitable.

As shown in FIGS. 1 and 3, the slider (4) is moved in one direction by the spring (5) interposed between the slider and the case (1A), that is, in the front end direction of the slider. Is urged to. In the slider (4), the end on the side where the spring (5) is attached,
That is, the end opposite to the biasing direction of the spring (5) is called the rear end.

By the way, as the spring (5), as shown in FIG. 1, a helical spring having both ends formed in long legs is usually used. Such a spring (5) is preferably shaped such that each long leg is elongated with the coil portion as the center. When the spring (5) is formed with the coil portion as the center, the spring can be mounted before and after the spring in the assembly of the cartridge, and the working efficiency thereof can be improved.

The tips of the long legs of the spring (5) are shown in FIG.
As shown in Fig. 1, the coil portion is bent in a direction along the winding direction, and as shown in Figs. 1 and 3, the tip of one bent long leg is located behind the slider (4). The tip end of the other long leg portion that is inserted into the end and is bent is inserted into the recessed portion of the corner of the shell (2) located on the rear end side of the mounted slider (4).

Explaining the structure of the slider (4) in more detail, the slider (4) has a rectangular cross section as shown in FIG. 5 by injection molding a thermoplastic resin such as polyacetal or polyoxymethylene. Is integrally formed as a rod-shaped body. Then, as shown in FIGS. 5 and 6, the rear end portion of the slider (4) is provided with left and right hooking pieces (42) and (41) by a groove (46) cut from the bottom surface side of the slider. It has a shape divided into two. The groove (46) is provided so as not to impede the movement of one long leg of the spring (5) when the spring (5) expands and contracts, that is, one long leg can pass through the groove. It also plays a role of forming a clearance margin of the hook portions (43) and (44) when the slider (4) is fitted into the shells (1) and (2).

As described above, each of the hooking pieces (42), (41) is formed in a state of being hung downward from the rod-shaped body of the slider (4), and the outside of the left hooking piece (42). The latching portion (44) bulging outward is in the groove (16) of the edge of the shell (1), and the latching portion (43) bulging outward in the latching piece (41) on the right side is formed. Shell (2) Edge groove (2
6) respectively.

Further, the groove (46) between the respective hooking pieces (42), (41) is laterally expanded inside the rod-shaped body of the slider (4), and the expanded space is An insertion path (47) is provided for inserting the tip of one long leg of the spring (5). Such an insertion path (47) opens at the rear end surface of the rod-shaped body of the slider (4). Then, as shown in FIGS. 6 and 7, an inverted trapezoidal locking portion (48) for locking the tip of the inserted spring (5) is formed above the insertion path (47).

As shown in FIG. 7, the end face of the engaging portion (48) directed to the front end side of the slider (4) is gradually moved toward the front end side of the slider (4), and the ceiling face of the insertion path (47) is gradually increased. It is preferable that the inclined surface is close to When the locking portion (48) inside the rear end portion of the slider (4) is formed as described above, when the spring (5) is mounted, the bent tip end of the spring (5) is inserted into the insertion path. It can be easily inserted into the back side of the locking portion (48) at the rear end of the insertion path along the line (47), and a more efficient assembling work can be realized.

The reference numeral (49) is a slider (4).
This is a window portion opened on the left side surface of the rod-shaped main body, and the tip of the inserted spring (5) is slightly locked to the window portion (49), so that confirmation in the insertion work of the spring (5) is performed. And prevents the inserted spring (5) from falling off.

In the present invention, as shown in FIGS. 1 and 3, a stopper (45) is provided at the end of the slider (4) on the side opposite to the urging direction of the spring (5), that is, at the rear end of the slider (4). ) Is the main feature. Specifically, the stopper (45) is, as shown in FIGS. 6 and 8,
By extending the right hooking piece (42) downward, it is integrally formed with the hooking piece.

The length of the stopper (45) is, as shown in FIG. 4, the case (1A) (the shell (1A) (shell (4)) opposite to the side where the rider (4) is mounted by the bias of the spring (5). The length is such that it contacts the outer peripheral portion of the disc (3) and presses it when it moves to the end of (2)). The lower end of the stopper (45) is in the shape of an arc that substantially follows the outer circumference of the disc (3), as shown in FIG. That is, the stopper (45) contacts the outer peripheral edge of the disc (3) when the windows (11) and (21) are closed by the shutter (6) described later, and has a function of preventing rattling of the disc. Have.

On the other hand, as shown in FIGS. 2 and 4, the rib (1) of the shell (1) located on the rear end side of the slider (4) is used.
2) and the rib (22) of the shell (2) are notched (13) and (2) near the slider (4).
3) is formed. The notches (13) and (23) are large enough for the stopper (45) to pass through when the slider (4) moves, and
The opening is made as small as possible in order to reduce the intrusion of dust into the storage space of the disk (3).

On the slider (4), as shown in FIG.
A shutter (6) for opening and closing the windows (11) and (21) is attached. The shutter (6) is usually
It is formed by bending a thin metal plate into a flat U-shape. The shutter (6) has its parallel plate portions arranged on the respective board surfaces of the shells (1) and (2), and the shell (1).
As shown in FIG. 9, the lower end edge of the one flat plate portion disposed on the surface of is held by a holding edge (61) made of a thin metal plate.

Further, as shown in FIG. 6, a region (10) where the shutter (6) moves on the board surface of the shell (1).
The a) is in a state of being carved from the surface of the shell (1) by a depth corresponding to the plate thickness of the shutter (6). The area (10b) adjacent to the lower edge of the shutter (6) is the moving area (10a) of the shutter (6).
It is carved slightly shallower than the above, and such an area is used as an adhesive area of the above-mentioned pressing edge (61). Therefore,
Even when the lower edge of the shutter (6) is pressed by the pressing edge (61), a sufficient gap is secured between the pressing edge (61) and the moving area (10a) for the plate thickness of the shutter (6). Therefore, the operation of the shutter (6) is not restricted.

As shown in FIG. 9, the pressing edge (61) is attached to the above-mentioned adhesive region (10b) via an adhesive layer (62) provided on the back surface thereof. As shown in FIG. 10A, the adhesive layer (62) of the pressing edge (61) follows the shape of the curved lower end corners of the pressing edge (61), Is formed on about half of the back surface of the. Such an adhesive layer (62) is formed by attaching a resin film coated with an adhesive on both sides or transferring an adhesive printed in advance on another film.

When the adhesive layer (62) is formed on the entire surface of the lower half region of the rear surface of the pressing edge (61), both ends are formed in an arc shape in the state as shown in FIG. 10 (b), for example. Compared with the adhesive layer, the peripheral portion of the pressing edge (61) can be bonded more reliably, which is effective in preventing the pressing edge (61) from peeling off.

The assembly of the cartridge of the present invention is the same as the conventional one. As shown in FIG. 1, first, the disk (3) is first placed inside the rib (22) of the shell (2) and one side of the shell (2). The slider (4) is placed on the shell, the knob (7) is placed on the corner of the shell (2), and then the shell (1) is put on. The two laminated shells (1) and (2) have screw holes (18) and (1) shown in FIG.
8) and (28), (28) ...
They are integrated by inserting the screws (8), (8) ... Of the book and tightening them. The slider (4)
Can also be fitted after the shell is assembled.

Then, as shown in FIG. 1, a shutter (6) is fixed by screws (9) and (9) to the upper edge of the slider (4) facing the outside of the shell, and FIG. Shell (1) corner recess and shell (2) shown in
The spring (5) is inserted into the space formed by the recesses in the corners and attached to the rear end side of the slider (4).

By the way, in the cartridge as described above, a high manufacturing accuracy is required, but in particular, it is important to compensate the smooth opening / closing operation of the shutter for a long period of time in order to prevent generation of dust. is there. That is, it is important that the shutter (6) is attached accurately and firmly.

Specifically, as shown in FIGS. 1 and 9, the shutter (6) folded in a folded state is mounted so as to sandwich the slider (4) with respect to the upper edge of the slider (4), and , Tightened with screws (9). In the step of attaching the shutter (6), it is preferable to use a vise (50) having a specific structure, as shown in FIG.

That is, as shown in FIG. 11, the vise (50) has a pair of arms (51), which are formed so that their side surfaces facing each other are flat and are kept in parallel with each other so as to be able to approach and separate from each other, (52) and each arm (51),
It is composed of sandwiching pieces (53) and (54) attached to the upper edge near the tip of (52). Then, the sandwiching pieces (53) and (54) are connected to the arms (51) and (52), respectively.
It is made possible to adjust the protruding length with respect to.

In the mounting process of the shutter (6),
The cartridge equipped with the shutter (6) is held by the vise (50). In Vise (50),
Shutter (6) with a pair of arms (51), (52)
It is possible to hold the board surface of No. 1 and the board surface of each shell (1), (2), and at the same time, hold both side surfaces of the slider (4) by the holding pieces (53), (54).

That is, when the screws (9) and (9) are screwed by using the vise (50), the holding pieces (53),
By adjusting the protrusion length of (54) and the protrusion angle with respect to the arms (51) and (52) in advance, the parallel relationship between the axis of the slider (4) and the ridge of the bent portion of the shutter (6) can be precisely adjusted. Since it can be set and the slider (4) can be attached more accurately, the smooth operation of the shutter (6) can be compensated.

As described above, the cartridge of the present invention is a case (1A) which is formed as a flat box having a substantially rectangular shape, and the windows (11) and (21) are opened on the board surface thereof.
A disk (3) as a recording medium enclosed in the case, and a slider (4) slidably attached to one side edge of the case (1A) and biased in one direction by a spring (5). And a shutter (6) attached to the slider to open and close the windows (11) and (21)
A disk cartridge with a spring (5)
A stopper (45) is provided at the end of the slider (4) on the side opposite to the urging direction of the disk (3) so as to contact the outer peripheral edge of the disk (3) when the windows (11) and (21) are closed. There is.

Therefore, as shown in FIG. 3, the stopper (45) provided at the end of the slider (4) has the window (11) when the cartridge is loaded in the disk device.
When (21) and (21) are opened, they separate from the disc (3), allowing the disc (3) to rotate freely. Then, as shown in FIG. 4, the stopper (45) causes the cartridge (1) to be ejected from the disk device and the window (1
Slider (4) when 1) and (21) are closed
Is brought into contact with the outer peripheral edge of the disc (3) to fix the disc in the case. In other words, in the cartridge of the present invention, it is possible to prevent the disc (3) from rattling when not in use, and to prevent the disc (3) from colliding with the inner surface of the case. It is possible to further reduce dust.

In the present invention, the stopper may be provided on the hooking piece (41) or both of the hooking pieces (41) and (42). Further, the rear end portion of the slider (4) can be provided in various forms such as being directly provided on the rod-shaped main body of the slider (4).

[0039]

As described above, according to the disc cartridge of the present invention, it is possible to prevent the disc from rattling when not in use and to prevent the disc from colliding with the inner surface of the case. It is possible to further reduce dust generation.

[Brief description of drawings]

FIG. 1 is a development view showing the structure of a disc cartridge of the present invention.

FIG. 2 is a plan view showing the internal structure of two shells as a case used in the disc cartridge of the present invention.

FIG. 3 is a plan view of a main part inside a shell showing a slider and its operation.

FIG. 4 is a plan view of a main part inside a shell showing a slider and its operation.

FIG. 5 is a side view showing the structure of a slider.

6 is a view taken along the line AA in FIG. 5, and is a rear view showing the shape of the rear end portion of the slider.

7 is a BB arrow view in FIG. 6, and is a cutaway view showing the internal structure of the slider rear end portion.

8 is a sectional view taken along the line CC in FIG. 6, showing the internal structure of the slider rear end portion and the stopper.

FIG. 9 is a plan view showing the structure of a pressing plate at the lower end of the shutter.

FIG. 10 is a rear view of the pressing plate, showing the planar shape of the adhesive layer provided on the pressing plate.

FIG. 11 is an explanatory diagram showing a method of attaching a shutter to a slider.

[Explanation of Codes] 1A: Case 1: Shell 11: Window 2: Shell 21: Window 3: Disc 4: Slider 45: Stopper 5: Spring 6: Shutter

Claims (1)

[Claims] 1. A case, which is formed as a substantially rectangular flat box body and has a window opened on its board surface, a disk as a recording medium enclosed in the case, and a slide on one side edge of the case. In a disk cartridge provided with a slider freely attached and biased in one direction by a spring, and a shutter attached to the slider to open and close the window, a slider of the slider on the side opposite to the biasing direction of the spring is provided. The disk cartridge, wherein a stopper is provided at an end portion of the disk, the stopper being in contact with an outer peripheral edge of the disk when the window is closed.