JP2002288961A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently suppress dust from entering into a cartridge main body without increasing cost so much in a disk cartridge in which a recording disk is stored in the cartridge main body. SOLUTION: In the disk cartridge 1A with the cartridge main body 2 in which an opening is formed, a shutter 3 made possible to be slid to the cartridge main body 2 and capable of opening/closing the opening, it is further provided with a thickness direction pressurizing means 43 and a radius direction pressurizing means to pressurize the shutter 3 to the cartridge main body 2 in the thickness direction of the cartridge main body 2 and the radius direction of the recording disk at a state that the opening is closed by the shutter 3. A flange part 63 to project toward the side of the cartridge main body 3 is further provided to a peripheral part of the shutter 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge in which a recording disk such as an optical disk, a magnetic disk, or a magneto-optical disk is housed.

[0002]

2. Description of the Related Art In recent years, in a magneto-optical disk device or the like, a high-density recording has been promoted by making a light spot smaller than before. Accordingly, the spacing between the unit including the condenser lens (hereinafter, referred to as “head”) and the disk is 0.1 mm or less, and the thickness of the protective film of the recording disk is 0.1 mm or less.

Therefore, when a disk cartridge in which a recording disk is housed in a cartridge main body (case) is used, if a relatively large amount of dust is present in the cartridge main body, the wind caused by the rotation of the recording disk is increased. Dust floats along with the flow of air, and this gets into the spacing between the head and the recording disk. Further, even when dust adheres to the surface of the recording disk, the dust will fit into the spacing between the head and the recording disk.

If the recording disk continues to rotate in such a state, the recording disk and the head may be damaged and may be damaged. For this reason, there is an increasing need to take measures against dust.

As a countermeasure against dust, there is a method of preventing dust entering the cartridge body from adhering to the recording disk, and a method of removing dust. The former method is disclosed in, for example, JP-A-5-325469. This publication discloses a technique for performing antistatic treatment on at least a recording / reproducing area of a recording disk and an inner surface of a cartridge body facing the area. On the other hand, the latter method is disclosed in, for example, JP-A-11-213600. This publication discloses a technique of providing a dust collection passage in a cartridge body, arranging a dust collection filter in the dust collection passage, and passing dust-containing air through the dust collection filter to remove dust. ing.

However, means for preventing dust from adhering to the recording disk and removing dust are merely measures against dust that has entered the cartridge body, and must be said to be ex post measures. Therefore, it is better to take measures to prevent dust from entering the case as much as possible. For such measures, see, for example,
No. 5,0022, and Japanese Utility Model Laid-Open No. 7-41771.

[0007] The technique disclosed in Japanese Patent Application Laid-Open No. 10-50022 discloses a shutter for opening and closing an opening for accessing a head with respect to a recording disk accommodated in a cartridge main body. A pressing means for pressing one side of the shutter against one side of the case is provided. On the other hand, the technique disclosed in Japanese Utility Model Laid-Open Publication No. 7-41771 is provided with a lock mechanism so that the shutter is not easily opened by means other than the drive device.

However, in these techniques,
Due to the complicated structure of the pressing means and the lock mechanism, the working efficiency in the manufacturing process is poor and the manufacturing cost is disadvantageous.In addition, it cannot be said that dust intrusion into the cartridge body is not sufficiently suppressed. There is still room for improvement.

The present invention has been made in view of the above circumstances, and in a disk cartridge in which a recording disk is housed in a cartridge main body, the intrusion of dust into the cartridge main body is accompanied by a significant increase in cost. It is an object of the present invention to be able to sufficiently suppress the occurrence of a spill.

[0010]

According to the present invention, the following technical measures are taken to solve the above-mentioned problems.

A disk cartridge provided according to a first aspect of the present invention has a cartridge body having an internal space capable of accommodating a recording disk and having an opening communicating with the internal space; A shutter that is slidable with respect to the opening and that can open and close the opening, and has any one of the following four features.

A first feature is that a thickness direction pressing means for pressing the shutter in the thickness direction of the cartridge main body with respect to the cartridge main body when the opening is closed by the shutter is further provided.

The thickness direction pressing means is constituted, for example, as a shutter guide having a pressing portion for guiding the slide of the shutter and pressing the shutter against the cartridge body. The pressing portion is formed of, for example, a leaf spring.

In a preferred embodiment, one of the pressing portion and the cartridge main body is provided with a convex portion which comes into contact with the other of the pressing portion and the cartridge main body when the opening is closed by the shutter.
Also, on the other of the pressing portion and the cartridge body,
You may provide the convex part which the said convex part contacts in the state where the opening part was closed with the shutter.

In addition to the shutter guide or in place of the shutter guide, the thickness direction pressing means may be constituted by a convex portion. The projection is provided, for example, on one of the shutter and the cartridge main body, and comes into contact with the other of the shutter and the cartridge main body when the opening is closed by the shutter. More specifically, this projection has, for example, a slide in which a shutter can be moved along a guide provided on the cartridge body, and one of the guide and the slide has an opening closed by a shutter. At
The other end of the guide and the slide can be configured to ride on.

A second feature is that a shutter is slidable with respect to the cartridge body and can open and close an opening,
In a state in which the opening is closed by the shutter, the shutter is pressed against the cartridge body in the radial direction of the recording disk, and radial pressing means having locking portions provided on each of the shutter and the cartridge body is provided. It is. In the radial pressing means, for example, one of the locking portions of the shutter and the cartridge main body has an elastic portion which can be deflected in the radial direction, and the elastic portion is provided on one of the shutter and the cartridge main body. The shutter is pressed against the cartridge body in the radial direction by being locked by the stopper and displaced in the radial direction. The locking part of the shutter
It is preferable to provide at each of both ends of the slide body.

A third feature is that a flange portion protruding toward the cartridge body is provided on a peripheral portion of the shutter,
A contact surface that directly or indirectly comes into contact with the flange when the opening is closed by the shutter is provided around the opening. The flange portion is made of, for example, an elastic material.

In a preferred embodiment, one of the flange portion and the contact surface is provided with a shield member at a portion facing the other. The shield member is
For example, it is made of an elastic material.

A fourth feature is that a lock mechanism for maintaining a state in which the opening is closed by the shutter is provided.
This lock mechanism is configured to include, for example, a lock body having a fixed portion fixed to the cartridge main body and a swing portion that is swingable via a spring portion.

In a preferred embodiment, the locking state is established by engaging the convex portion on one of the shutter and the lock body with the concave portion on the other of the shutter and the locking member, and the rocking portion is rocked. Then, the engagement state is released to be set to the unlocked state.

The shutter is preferably subjected to an antistatic treatment. This antistatic treatment may be performed on one or both of the inner and outer surfaces of the shutter.

A disk cartridge provided by the second aspect of the present invention has an internal space capable of accommodating a recording disk, a first opening communicating from the first surface side to the internal space, and the first surface. A cartridge body in which a second opening communicating with the internal space is formed from a second surface side opposite to the first surface; and a slidable with respect to the cartridge body to open and close the first opening. A first shutter, which is slidable independently of the first shutter with respect to the cartridge body,
A second shutter capable of opening and closing the opening.

In a preferred embodiment, one of the first and second shutters is provided with a concave guide portion extending in the sliding direction, and the other of them has a convex guide portion fitted into the concave guide portion. Is provided.

In a preferred embodiment, when the first or second opening is closed by the first or second shutter, the first or second shutter is moved relative to the cartridge body in the thickness direction of the cartridge body. The apparatus further includes thickness direction pressing means for pressing.

The thickness direction pressing means is configured as, for example, a shutter guide which guides the slide of the first or second shutter and has a pressing portion for pressing the first or second shutter against the cartridge body. The pressing portion is configured as, for example, a leaf spring.

In a preferred embodiment, one of the pressing portion and the cartridge main body is closed with the first or second shutter by the first or second shutter, and the pressing portion and the cartridge main body are closed. Is provided with a convex portion that abuts on the other side. Further, a convex portion that contacts the convex portion when the opening is closed by the first or second shutter may be provided on the other of the pressing portion and the cartridge body.

In addition to or instead of the shutter guide, the thickness direction pressing means may be constituted by a convex portion. The projection is provided on one of the first or second shutter and the cartridge body, for example.
In a state where the opening is closed by the first or second shutter, the first or second shutter and the other of the cartridge main body are brought into contact with each other. This projection is
More specifically, for example, the first or second shutter has a slide movable along a guide provided on the cartridge body, and the first or second shutter is attached to one of the guide and the slide by the first or second shutter. With the first or second opening closed, the other end of the guide and the slide can be configured to ride up.

In a preferred embodiment, the first or second shutter is pressed against the cartridge body in the radial direction of the recording disk with the first or second opening closed by the first or second shutter. Radial pressing means is further provided.

The radial pressing means is constituted, for example, as one having a locking portion provided on each of the first or second shutter and the cartridge body. In this case, the locking portion of one of the first and second shutters and the cartridge body has, for example, an elastic portion that can be deflected in the radial direction, and the elastic portion is formed of the first or second shutter and the cartridge. The first or second shutter is configured to be pressed radially against the cartridge body by being locked in one locking portion of the main body and being displaced in the radial direction. It is preferable that the locking portion of the first or second shutter is provided at each of both ends of the slide body.

In a preferred embodiment, a flange protruding toward the cartridge body is provided on the peripheral edge of the first or second shutter, and the first or second shutter is provided around the first or second opening. Accordingly, a contact surface that directly or indirectly contacts the flange portion in a state where the first or second opening is closed is provided. This flange portion is made of, for example, an elastic material.

In a preferred embodiment, one of the flange portion and the contact surface is provided with a shield member at a portion facing the other. The shield member is made of, for example, an elastic material.

In a preferred embodiment, the state where the first or second opening is closed by the first or second shutter is maintained by the lock mechanism. The lock mechanism includes, for example, a lock body having a fixed portion fixed to the cartridge body and a swing portion that is swingable via a spring portion. In this case, for example, the projection is formed in one of the first and second shutters and the lock body and the depression in the other of the first and second shutters and the recess is engaged with each other, whereby the locked state is established. The unlocked state is established by releasing the engaged state.

Preferably, at least one of the first and second shutters is subjected to an antistatic treatment.

In any of the first and second aspects of the present invention, the cartridge body is connected to the first case and the second case.
It is preferable to have a case, and to provide a convex portion on one peripheral portion of the first and second cases, and to provide a concave portion for fitting the convex portion on the other peripheral portion of the first and second cases.
The projections and depressions are preferably provided circumferentially so as to surround the recording disk.

Further, the inner space of the cartridge body may have a portion whose height increases toward the outside in the radial direction of the recording disk.

The surface of the recording disk is preferably subjected to at least one of an antistatic treatment and a water-repellent treatment. It is preferable that the cartridge body is also subjected to an antistatic treatment. Further, the internal space may be surrounded by a charging layer. The charging layer is formed by, for example, attaching a cloth or a sheet having charged fine cilia.

It is preferable that a desiccant is sealed in the cartridge body in order to prevent dust from adhering to the recording disk due to moisture.

[0038]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disk cartridge according to an embodiment of the present invention will be specifically described below with reference to FIGS. Here, FIG. 1 is an overall perspective view showing an example of a disk cartridge according to the present invention, and FIG.
FIG. 3 is an overall perspective view of the upper case as viewed from the inside, FIG. 4 is an overall perspective view of the lower case as viewed from the inside, and FIG. 6 is a cross-sectional view taken along the line BB in FIG. 1, FIG. 7 is a cross-sectional view taken along the line CC in FIG. 1, and FIG. Perspective view, FIG. 9
FIG. 10 is a sectional view taken along line DD of FIG. 1, FIG. 10 is a perspective view of a principal part for explaining the slider, FIG. 11 is a plan view for explaining the operation of the slider, and FIG. FIG. 13 is a plan view for explaining the operation of the lock body.
FIG. 14 is a sectional view taken along line EE in FIG.

As shown in FIGS. 1 and 2, the disk cartridge 1A is
The recording disk D is housed in the cartridge 0, and has a shutter 3 that can move relative to the cartridge body 2.

As the recording disk D, a magnetic disk,
An optical disk and a magneto-optical disk can be used. In the present invention, it is preferable to perform at least one of an antistatic treatment and a water-repellent treatment on the surface of the recording disk D.

As the antistatic treatment, for example, DLC
(Diamond-like carbon), a method of forming an antistatic layer with carbon, tungsten disulfide, molybdenum disulfide, a surfactant, or a coating agent containing at least one of them. By performing such an antistatic treatment, the generation of static electricity on the recording disk D can be suppressed. Therefore, even if dust enters the internal space 20, the dust can be suppressed from adhering to the recording disk D. .

On the other hand, the water-repellent treatment includes, for example, a method of coating a fluororesin or a silicon resin. By performing such a water-repellent treatment, the recording disk D
The adhesion of moisture to the recording disk D is suppressed, and the moisture is scattered from the recording disk D by the rotation of the recording disk D. Therefore, even if dust enters the internal space 20, it is possible to avoid a state in which the dust remains on the surface of the recording disk D due to moisture, thereby suppressing the adhesion of the dust to the recording disk D. be able to.

The cartridge body 2 includes an upper case 4 and a lower case 5 formed of, for example, resin, and a plurality of screws N1.
Has the form joined by. The bonding between the upper case 4 and the lower case 5 may be performed using an adhesive or the like, and the bonding method is not particularly limited in the present invention.

As shown in FIGS. 2 to 4, openings 40 and 50 are formed in the upper case 4 and the lower case 5, respectively. The opening 40 of the upper case 4 is formed on the bottom wall of the concave region 41 on the outer surface of the upper case 4. The opening 50 of the lower case 5 is also formed on the bottom wall of the concave region 51 as expected from FIGS. These openings 40 and 50 allow access of an optical head and a magnetic head (not shown) to a recording layer and a reproducing layer of the recording disk D, and insertion of a spindle (not shown) for rotating the recording disk D. It is for doing. Of course, the opening for the optical head or the magnetic head and the opening for the spindle may be formed separately.

The concave region 41 of the upper case 4 has a rib 42 extending along the opening 40 as best seen in FIG.
Is provided. The side surface 42a of the rib 42 and the wall surfaces 41a and 41b that define the concave region 41 constitute a contact surface. As shown in FIG. 9, a rib 52 similar to that of the upper case 4 is also formed in the concave region 51 of the lower case 5, and as shown in FIGS.
The contact surface is constituted by a and the wall surfaces 51 a and 51 b defining the concave region 51.

A shutter guide 43 having a function of guiding the slide of the shutter 3 is provided on the outer surface of the upper case 4 as is clearly shown in FIGS.
The shutter guide 43 has a pressing portion 43a configured as a leaf spring, and forms a thickness direction pressing unit. In FIG. 1, reference numeral 43c denotes a cut into the shutter guide 43. The notch 43c adds a spring property to the pressing portion 43a.
c is not always necessary. The pressing portion 43a protrudes above the concave region 41, and protrudes toward the concave region 41 as shown in FIG.
Is provided. The convex portion 53b is also provided on the outer surface of the lower case 5.
Guide 53 having a pressing portion 53a provided with
Is provided.

The shutter guides 43, 53 are
For example, it can be formed by pressing a metal plate or by resin molding. Therefore,
In constructing the thickness direction pressing means, the cost does not increase so much.

When the shutter guides 43 and 53 are formed of resin, it is preferable that the surfaces thereof are subjected to an antistatic treatment. Then, the amount of dust existing around the shutter guides 43, 53 can be reduced by preventing dust from adhering to the shutters 43, 53, and the intrusion of dust into the internal space 20 can be suppressed. Of course, the same effect can be obtained when the shutter guides 43 and 53 are formed of metal.

For the antistatic treatment, the same method as the antistatic treatment for the recording disk D can be adopted, and the shutter guides 43 and 53 are formed using a conductive resin material.
The entirety of the shutter guides 43 and 53 may be conductive.

FIGS. 3 and 6 show the inner surface of the upper case 4.
An annular convex portion 44 is formed in a substantially circumferential shape as is clearly shown in FIG. The diameter of the annular convex portion 44 is
Is slightly larger than the diameter. An annular groove 45 is formed on the outer periphery of the annular protrusion 44. On the other hand, a circular concave portion 54 is provided on the inner surface side of the lower case 5 so that the annular convex portion 44 of the upper case 4 is fitted to the outside as well shown in FIGS. An annular convex portion 55 that fits into the annular groove portion 45 of the case 4 is provided.

FIG. 6 shows a state in which the upper case 4 and the lower case 5 are connected to each other.
Is formed so as to be externally fitted by the circular concave portion 54 of the lower case 5 and the annular convex portion 55 of the lower case 5 is fitted to the annular groove portion 45 of the upper case 4. Dust hardly enters the cartridge body 2 as compared with a case where the peripheral portions are flat surfaces and the upper case 4 and the lower case 5 are joined to each other in this flat surface. In other words, as shown in FIG. 3, the annular convex portion 45 of the upper case 4 serves as a wall to prevent dust from entering the internal space 20. As shown in FIG. 6, the contact interface between the upper case 4 and the lower case 5 at the peripheral edge of the upper case 4 and the lower case 5 has an uneven shape. The distance is longer than in the case where the contact interface is a flat surface, and since the path is complicated, dust does not easily enter the internal space 20.

In the present embodiment, as shown in FIG. 6, the bottom surface 45 of the region surrounded by the annular convex portion 45 of the upper case 4
a, and the bottom surface 55a of the circular concave portion 54 of the lower case 5
The thickness of at least the peripheral portion is reduced. Therefore, in a state where the upper case 4 and the lower case 5 are combined,
The height of at least a part of the peripheral portion of the internal space 20 is increased. The gas in the internal space 20 when the recording disk D is rotated flows radially outward along the surface of the recording disk D, and flows radially inward along the inner surfaces of the upper case 4 and the lower case 5. Flow to the side. Therefore, if the height of a part of the peripheral portion of the internal space 20 is increased, the gas flow at the peripheral portion of the internal space 20 can be smoothly turned back, and the flow velocity of the gas and thus the flow velocity of the dust can be reduced by the nozzle effect. Expected to grow. As a result, an effect of suppressing the adhesion of dust to the recording disk D is expected.

At the center of one edge of the lower case 5, a notch 56 is provided as well shown in FIG. Each of both sides of the cutout 56 is shown in FIGS.
0, three guide grooves 57A, 57
A guide portion 57 having a B is provided. The guide portion 57 is connected via a bridge portion 58 as shown in FIG.

A notch 46 is also provided at the center of one edge of the upper case 4 as shown in FIG. 3, and both sides of the notch 46 are clearly shown in the drawing. Although not provided, two guide portions 47 connected via a bridge portion 47 are provided. These guide portions 47 are also provided with three guide grooves 47A and 47B. At the end of the guide groove 47B, a convex portion 47b having a tapered surface is provided as is well shown in FIG.

As shown in FIG. 6, charging layers 48 and 58 are formed on the inner surfaces of the upper case 4 and the lower case 5. These charged layers 48 and 58 are made of, for example, a cloth or a sheet having a chargeability and having fine cilia (for example, a knitted or woven fabric using wool or the like, a nonwoven fabric or a felt,
Staples (short fibers) on a base cloth or the like, or a raised cloth. By forming such charged layers 48 and 58, even if dust enters the internal space 20, the dust adheres to the charged layers 48 and 58, so that the adhesion of dust to the recording disk D can be suppressed. In particular, when the recording disk D rotates, the dust flows along the inner surfaces (the charged layers 48 and 58) of the upper case 4 and the lower case 5, so that the dust in the internal space 20 is removed by the charged layer 4
8, 58 to remove efficiently.

On the inner surfaces of the upper case 4 and the lower case 5,
Instead of the charging layers 48 and 58, an antistatic layer is formed of carbon such as DLC (diamond-like carbon), tungsten disulfide, molybdenum disulfide, a surfactant, or a coating agent containing at least one of these. Alternatively, the antistatic layer may be formed by attaching a metal foil or the like. Of course, upper case 4
Also, an antistatic layer may be provided on the outer surface of the lower case 5 or each of the upper case 4 and the lower case 5 may be formed of a conductive resin to prevent the entire cartridge body 2 from being charged. In this case, the disk cartridge 1
A is prevented from adhering dust to the disc cartridge 1
Since the amount of dust existing around A is reduced, the intrusion of dust into the internal space 20 can be suppressed.

As shown in FIG. 3, the cartridge body 2
The desiccant 9 may be stored in the inside. In this case, the humidity inside the cartridge body 2 is reduced, so that the adhesion of moisture to the recording disk D, and hence the adhesion of dust, can be suppressed. Examples of the desiccant 9 include silica gel.

The shutter 3 has openings 4 in the upper case 4 and the lower case 5 as best seen in FIGS.
It opens and closes 0,50. The shutter 3 has a shutter body 6 and a slider 7 as shown in FIGS. 1 and 7, and each opening 40,
The state where 50 is closed is fixed.

As shown in FIGS. 7 and 8, the shutter main body 6 is formed by a pair of plate-like portions 61 and 62 from a base 60.
Have a U-shaped cross-section extending. Base 60
Is provided with a through hole 60a, and the shutter body 6 is fixed to the slider 7 using the through hole 60a. Of course, the shutter body 6 may be fixed to the slider 7 with an adhesive, or a protrusion may be provided on the slider 7 at a position corresponding to the through hole 60a of the shutter body 6, and the protrusion may be formed in the through hole. The shutter main body 6 may be fixed to the slider 7 by caulking in a state where the shutter main body 6 is inserted into the slider 60.

On the other hand, each of the plate portions 61 and 62 is formed in such a size that the openings 40 and 50 formed in the upper case 4 or the lower case 5 can be completely closed as shown in FIG. . As shown in FIG. 8, flange portions 63 and 64 are provided on the inner surfaces of the plate-like portions 61 and 62 along the long edge and the short edge, respectively. The flange 63,
Cut portions 63a and 64a are provided in a part of the short edge portion of the shutter body 6 in 64 so that the ribs 42 and 52 do not interfere with the shutter 3 when the shutter 3 is assembled. These flange portions 63 and 64 are formed of an elastic material such as rubber, for example. When the shutter 3 slides with respect to the cartridge body 2, the flange portions 63 and 64 are formed in concave regions of the cases 4 and 5. 41, 51
Move through a slight gap with the bottom surfaces 41c and 51c of the first and second surfaces.
Thus, the flange portions 63, 64 and the bottom surfaces 41c, 51
By providing a gap between the shutters c, the shutter 3 can be smoothly opened and closed, and the generation of dust due to sliding can be suppressed. Then, when the openings 40 and 50 are closed by the shutter 3, the side surfaces of the flange portions 63 and 64 are connected to the side surfaces 42a of the ribs 42 and 52 of the cases 4 and 5 as best seen in FIGS. 52a and concave region 4
Wall surfaces 41a, 41b, 51a, 51 that define 1, 51
b (see FIG. 2). The bottom surfaces of the flange portions 63 and 64 are in contact with the bottom surfaces of the concave regions 41 and 51 of the cases 4 and 5, and the pressing portions 43 a and 53 a of the shutter guides 43 and 53 cause the respective plate portions 61 and the shutter body 6 to move. Are pressed by the respective cases 4 and 5.

As shown in FIG. 5, convex portions 61a and 62a are formed at the tips of the plate portions 61 and 62, respectively. The projections 61 a and 62 a are provided at positions where the projections 43 a of the shutter guide 43 abut when the openings 40 and 50 of the cases 4 and 5 are closed by the shutter 3. Therefore, when the openings 40 and 50 are closed by the shutter 3, the convex portions 43b of the shutter guide 43 abut against the convex portions 61a and 62a of the plate portions 61 and 62, and the respective plate portions 61 and 62 are connected to the flange portions. 63, 64 (the bottom surface 41 of the concave region 41, 51).
c, 51c). As a result, the flange 6
The state in which the third and the third 64 are in contact with the bottom surfaces 41c and 51c of the concave regions 41 and 51 is appropriately maintained. In particular, if the flange portions 63 and 64 are made of an elastic material such as rubber, the airtightness in the cartridge body 2 is further improved.
In addition, the convex parts 61a and 62a provided in each plate-shaped part 61 and 62 are provided.
Is not always necessary, and even if this portion is flat, it is only necessary that the shutter guides 43, 53 have protrusions 43a, 53a. Further, the shutter guides 43 and 53 may be flat surfaces, and the plate-shaped portions 61 and 62 may be provided with protrusions only.

The shutter body 6 is formed by pressing a metal plate or molding a resin, and then forming the plate-shaped portion 6.
It can be formed by fixing the flange portions 63 and 64 to the peripheral portions of the flanges 1 and 62. Of course, the shutter 3 may be formed by forming the shutter body 6 as two members and individually fixing them to the slider 7. When the shutter body 6 is formed of resin, the shutter body 6
It is preferable that an antistatic treatment is applied to the surface of the substrate. Then, the amount of dust existing around the shutter main body 6 can be reduced by preventing dust from adhering to the shutter main body 6, and the intrusion of dust into the internal space 20 of the cartridge main body 2 can be suppressed. .

On the other hand, the slider 7 is shown in FIGS.
As shown in FIG. 7, the slider body 70 has a rod-like shape as a whole, and has locking portions 71 and 72 at both ends. Such a slider 7 may be integrally formed by machining or resin molding, or may be formed by forming the slider body 70 and the locking portions 71 and 72 as separate bodies and then integrating them. You may. Also,
It is preferable that the slider 7 is also subjected to an antistatic treatment.

The slider body 70 has two guide grooves 74 formed between the three convex guides 73 extending in the longitudinal direction on each of the front and back surfaces thereof, and has an uneven shape. Each of the convex guides 73 is formed so as to fit into the guide grooves 47a and 57a of each of the cases 4 and 5, as best seen in FIGS. Guide groove 47 for 4 and 5
A and 57A are slidable. At the end of the slider body 70 (on the side of the locking portion 72), an engaging projection 70a that projects in the width direction of the slider body 70 is provided.

The locking portions 71 and 72 are shown in FIGS.
As shown in FIG. 1, two bar-shaped portions 71B, 71C, 7 are provided in parallel from the base portions 71A, 72A at a predetermined interval.
2B and 72C have an extended F-shape. These locking portions 71 and 72 are provided at portions deviated in the thickness direction of the slider main body 70 with respect to the engaging projections 70a.

The locking projections 71b, 72 protruding in the width direction of the slider body 70 are provided at the tips of the rods 71B, 72B.
b is provided at the tip of each of the rod-shaped portions 71C and 72C.
c, 72c are provided. Base 71A of locking portion 71
Is provided with a through hole 71a extending in the thickness direction. The slider 3 is connected to the upper case 4 via a spring B using a through hole 71a, as best seen in FIGS. The spring B connects the shutter 3 and the upper case in a state where the spring 3 is contracted from the natural state. Therefore, when no external force is applied to the shutter 3, the spring B
The shutter 3 is urged to the right side in FIG. 3 (the left side in FIG. 11) by the elastic restoring force of
Is closed.

When the slider 7 is moved, the locking portions 71,
72 also moves according to the guide groove 47B of the upper case 4. When the openings 40 and 50 of the cases 4 and 5 are closed, the locking projection 71c rides on the projection 47b of the guide groove 47B as shown in FIG. This allows
A force acts on the slider body 70 in the direction indicated by arrow D in the figure. As a result, as shown in FIGS. 5 and 9, one plate-shaped portion 61 of the shutter main body 6 is pressed by the upper case 4, and the other plate-shaped portion 62 is pressed by the lower case 5 by the reaction, and The state in which the portions 63 and 64 appropriately contact the bottom surfaces 41c and 51c of the concave regions 41 and 51 of the cases 4 and 5 is maintained. Also, the slider body 2 has a spring B
As shown in FIG. 9, the flange portions 63 and 64 form the contact surfaces 41 a, 42 a and 51.
a, 52a is properly maintained.

On the other hand, when the openings 40, 50 of the cases 4, 5 are closed, the locking projections 71b, 72b are provided on the upper case 4 as shown in FIGS. Locked by the parts 49a, 49b. This allows
The rods 71B and 72B exert a force in a direction away from the rods 71C and 72C, and the slider 7 and the shutter 3
Is pressed against the cartridge body 2 in the radial direction (arrow C) of the cartridge body 2. As a result, FIG.
As shown in FIG.
The state of being appropriately pressed against 51b is maintained. Further, if the flange portions 62A, 62B are made of an elastic material such as rubber, the airtightness inside the cartridge body 2 is further enhanced.

As shown in FIGS. 12 to 14, the lock body 8 is connected to a fixing portion 80 fixed to the hill 49C provided on the upper case 4 via a spring portion 81. And a swing portion 82 which is swingable with respect to the fixed portion 80. Such a lock body may be formed by pressing or machining a metal plate, or may be integrally formed by resin molding.
After the spring portion 81 and the swing portion 82 are individually formed, they may be integrally formed. As described above, since the lock body 8 can be easily formed, there is not much increase in cost in constructing the lock mechanism. Of course, lock body 8
Is preferably subjected to an antistatic treatment.

The fixing portion 80 has two through holes 80a, 80
b. In these through holes 80a, 80b,
The convex portion 49c of the hill 49C is fitted, so that
The fixing portion 80 is fixed to the lock 9, and the entire lock body 8 is disposed above the locking portions 71 and 72 of the slider 3 in FIG.

The spring portion 81 is constituted by a pair of flexible torsion bars 81a and 81b, and can be displaced in the radial direction (arrow A) of the upper cover 4 with respect to the fixed portion 80. . Of course, the spring portion 81 may be constituted by one or three or more torsion bars,
The spring property may be provided by providing a slit or a through hole.

The swing portion 82 has an engaging recess 82A and an ear piece 82B. In each case 4,
In a state in which the openings 40 and 50 of the slider body 5 are closed, the engaging projections 70a of the slider body 70 are engaged with the engaging recesses 82A. As a result, the slider main body 70 and, consequently, the shutter 3 are fixed to the cartridge main body 2 via the lock body 8, so that the shutter 3 does not easily slide. On the other hand, as shown in FIG.
Is closed, the end 82b is exposed. Therefore, when the end portion 82b is pressed (arrow B), the swinging portion 82 swings with respect to the fixed portion 80 (arrow A), and the locked state of the engaging convex portion 70a with the engaging concave portion 82A is released. The shutter 3 is in a state where the shutter 3 slides easily.

The disk cartridge 1A described above
Then, the shutters 3 allow the openings 40,
In a state where the shutter 50 is closed, the state in which the flange portions 63 and 64 provided on the shutter 3 are in contact with the cases 4 and 5 is appropriately maintained, and the airtightness in the cartridge body 2 is high. In addition, intrusion of dust into the internal space 20 can be sufficiently suppressed. In addition, each opening 40,5
In the closed state of 0, since the slider 7 is locked and the shutter 3 does not slide carelessly, the entry of dust can be suppressed from this point as well. further,
Since each of the cases 4 and 5 is connected by fitting the convex portions 44 and 55 and the concave portions 45 and 54, it is possible to prevent dust from entering the internal space 20 from that point. If the surfaces of the cartridge body 2 and the shutter 3 are subjected to antistatic treatment, the adhesion of dust to the surface of the disk cartridge 1A is suppressed, and the amount of dust existing around the disk cartridge 1A is reduced. Intrusion of dust into the space 20 can be suppressed.

On the other hand, even if dust enters the internal space 20, the surface of the recording disk D is subjected to an antistatic treatment or a water-repellent treatment, and the inner surfaces of the cases 4, 5 are subjected to an antistatic treatment or a charging treatment. By doing so, it is possible to suppress the attachment of dust to the recording disk D. As a result, breakage of the recording disk D and the head can be suppressed.

Next, the disk cartridge according to the second and third embodiments of the present invention will be described with reference to FIGS.
8 will be described. Here, FIG. 15 is a sectional view corresponding to the line AA in FIG. 1 of the disk cartridge according to the second embodiment of the present invention, and FIG. 16 is a sectional view taken along the line DD in FIG. FIG. 17 is a sectional view corresponding to the line AA in FIG. 1 of the disk cartridge according to the third embodiment of the present invention, and FIG. 18 is a sectional view of the disk cartridge in FIG. It is sectional drawing corresponding to a line. In these drawings, the same reference numerals are given to the same members or elements as those of the disk cartridge 1A according to the above-described first embodiment of the present invention, and description thereof is omitted here.

The basic structure of the disk cartridge 1B shown in FIGS. 15 and 16 and the disk cartridge 1C shown in FIGS. 17 and 18 are the same as those of the disk cartridge 1A described with reference to FIGS. is there. The disk cartridges 1B and 1C have a shutter 3B
Is different from the disc cartridge 1A.

The shutter 3B of the disc cartridge 1B
Is a shutter main body 6 as shown in FIGS.
The flanges 63B, 64B are provided by bending the peripheral edges of the plate-like portions 61B, 62B of B. Also in the shutter 3B, the flange portion 63
Since the shutters 3B and 64B are provided, it is possible to avoid a gap between the shutter 3B and each of the cases 4 and 5 when the shutters 3B close the openings 40 and 50 of each of the cases 4 and 5. In addition, intrusion of dust into the internal space 20 can be suppressed. Since such a shutter main body 6B can be formed by pressing a metal plate or the like, there is almost no increase in cost due to the provision of the flange portions 63B and 64B.

On the other hand, in the shutter 3C of the disc cartridge 1C, as shown in FIGS. 17 and 18, when the openings 40, 50 of the cases 4, 5 are closed by the shutter 3C, the flanges 63C, 64C The shield members 65C and 66C are arranged between the contact surfaces 41a, 41b, 42a, 51a, 51b and 52a. The shield members 65C, 66C are made of an elastic material such as rubber, for example, and have flange portions 63C, 64C or contact surfaces 41a, 41b,
42a, 51a, 51b and 52a are connected via an adhesive or the like. In this configuration, the airtightness in the cartridge main body 2 is further enhanced by the interposition of the shield member 65C, and the intrusion of dust can be suppressed more reliably.

Next, a disk cartridge according to a fourth embodiment of the present invention will be described with reference to FIGS. Here, FIG. 19 is an overall perspective view of a disk cartridge according to a fourth embodiment of the present invention, and FIG.
Is a sectional view taken along line FF of FIG. 19, and FIG. 21 is an overall perspective view of the slider.

The disc cartridge 1D employs a two-shutter system, and is configured such that the opening 40 of the upper case 4 and the opening 50 of the lower case 5 can be individually opened and closed. This is different from the disc cartridges 1A, 1B, 1C according to the first to third embodiments.

This disk cartridge 1D has an upper shutter 9A and a lower shutter 9B. Each of the shutters 9A and 9B has shutter bodies 90A and 90B and sliders 91A and 91B.

Each of the shutter bodies 90A and 90B has a section L
It has a character shape and is formed, for example, by pressing a metal plate. Each shutter body 90
A and 90B are sliders 91A and 91 using screws N2.
B is fixed. Of course, each shutter 90A, 9
OB may be fixed to the sliders 91A and 91B by using an adhesive or by caulking.

Each of the sliders 91A and 91B has a rod shape as a whole. The upper slider 91A is provided with a convex guide 92A extending in the longitudinal direction, while the lower slider 91B is fitted with the convex guide 92A. Concave guide 9
2B are provided. Thereby, the upper slider 91A
And the lower slider 1B are slidable independently of each other in the same or opposite directions.

Each of the sliders 91A and 91B has two convex portions 92A and 92B extending in the longitudinal direction and two concave portions 93A and 93B provided therebetween. The convex portion 92A of the upper slider 91A is fitted in a guide groove 47A provided in the upper case 4, and the upper slider 91A is slidable with respect to the upper case 4. On the other hand, the protrusion 92B of the lower slider 91B fits into the guide groove 57A provided in the lower case 5, and the lower slider 91B is
Is slidable. When no external force is applied to the sliders 91A and 91B, the sliders B are individually urged by the springs B so that the openings 40 and 50 are closed.

Therefore, since the sliders 91A and 91B are independent of each other and slidable with respect to the cases 4 and 5, the upper body 4 is fixed by the shutter bodies 92A and 92B fixed to the sliders 91A and 91B. The opening 40 and the opening 50 of the lower case 5 can be individually opened and closed. If the opening 40 of the upper case 4 and the opening 50 of the lower case 5 can be individually opened and closed in this way, for example, while information is recorded or reproduced on the recording disk D by one opening 40, the other is opened. Can be maintained in a closed state, so that the two openings 4 can be
In comparison with the case where 0 and 50 are simultaneously opened, the inner space 2
The possibility of dust entering the inside of the space is significantly reduced.

Of course, in the present embodiment, each shutter 9 is provided similarly to the disk cartridges 1A to 1C according to the above-described first to third embodiments of the present invention.
A, 9B are attached to the cartridge
The recording disk D may be configured to be pressed in the thickness direction and the radial direction. In this case, it is necessary to press the upper shutter 9A and the lower shutter 9B individually, and therefore, as shown in FIG. 21, two locking portions 94A, 94B, 95A, 95B are individually applied to the sliders 91A, 91B. And the locking projections 94Aa, 94Ab, 94Ba, 94Bb, 95 of the locking portions 94A, 94B, 95A, 95B.
The convex portions (49a, 49b) with which Aa, 95Ab, 95Ba, 95Bb are engaged or the convex portions (47
It is necessary to provide b) not only in the upper case 4 but also in the lower case 5 (see FIGS. 11 and 14). Also, using two lock bodies 8 (see FIG. 13), each shutter 9A,
9B may be configured to be individually lockable.

[0087]

As described above, according to the present invention,
Not only can the intrusion of dust into the internal space of the disk cartridge be suppressed, but also the ingress of dust into the recording disk can be suppressed. As a result, it is possible to prevent dust from entering between the recording disk and the head, and to avoid damage to the head and the recording disk.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an example of a disk cartridge according to the present invention.

FIG. 2 is an overall perspective view showing a state where a shutter is removed from the disk cartridge of FIG. 1;

FIG. 3 is an overall perspective view of the upper case as viewed from the inside.

FIG. 4 is an overall perspective view of the lower case viewed from an inner surface side.

FIG. 5 is a sectional view taken along line AA of FIG. 1;

FIG. 6 is a sectional view taken along the line BB of FIG. 1;

FIG. 7 is a sectional view taken along the line CC of FIG. 1;

FIG. 8 is a partial perspective overall perspective view of a shutter body.

FIG. 9 is a sectional view taken along the line DD in FIG. 1;

FIG. 10 is a cross-sectional perspective view of a main part for describing a slider.

FIG. 11 is a plan view for explaining the operation of the slider.

FIG. 12 is an overall perspective view of a lock body.

FIG. 13 is a plan view for explaining the operation of the lock body.

FIG. 14 is a sectional view taken along the line EE in FIG. 13;

FIG. 15 is a sectional view of the disk cartridge according to the second embodiment of the present invention, corresponding to the line AA in FIG. 1;

FIG. 16 shows the disc cartridge of FIG. 15;
FIG. 4 is a sectional view corresponding to line DD of FIG.

FIG. 17 is a sectional view of the disk cartridge according to the third embodiment of the present invention, corresponding to the line AA in FIG. 1;

FIG. 18 shows the disc cartridge of FIG. 17;
FIG. 4 is a sectional view corresponding to line DD of FIG.

FIG. 19 is an overall perspective view of a disk cartridge according to a fourth embodiment of the present invention.

FIG. 20 is a sectional view taken along the line FF in FIG. 19;

FIG. 21 is an overall perspective view of a slider.

[Explanation of symbols]

1A, 1B, 1C, 1D Disc cartridge 2 Cartridge main body 20 Internal space 3, 3B, 3C, 9A, 9B Shutter 40, 50 Opening 43 Shutter guide 43b, 53b Projection (thickness pressing means) 47b Projection (thickness direction) Pressing means) 49a, 49b Convex part (constituting radial pressing means) 61 Shutter body 61a Convex part (thickness pressing means) 63, 64 Flange part 7 Slider 71b, 72b Locking convex part (constituting radial pressing means) 71c, 72c Convex part (thickness direction pressing means) 8 Lock body 80 Fixed part 81 Spring part 82 Swinging part D Recording disk

Claims (10)

[Claims] 1. A cartridge main body having an internal space capable of accommodating a recording disk and having an opening communicating with the internal space, and slidable with respect to the cartridge main body to open and close the opening. And a thickness direction pressing means for pressing the shutter against the cartridge body in a thickness direction of the cartridge body when the opening is closed by the shutter. A disk cartridge, characterized in that: 2. A cartridge main body having an internal space capable of accommodating a recording disk and having an opening communicating with the internal space, and slidable with respect to the cartridge main body to open and close the opening. A shutter which presses the shutter in a radial direction of the recording disk against the cartridge body in a state where the opening is closed by the shutter, and a locking mechanism provided on each of the shutter and the cartridge body. And a locking portion of one of the shutter and the cartridge body has an elastic portion that can be deflected in the radial direction. The shutter is locked by one of the locking portions of the shutter and the cartridge body, and is displaced in the radial direction. And by, characterized in that said shutter is configured to be pressed against the radially with respect to the cartridge body, the disk cartridge. 3. A cartridge main body having an internal space capable of accommodating a recording disk and having an opening communicating with the internal space, and the cartridge main body being slidable with respect to the opening to open and close the opening. A disk cartridge comprising: a shutter which is capable of protruding toward a side of the cartridge main body at a peripheral portion of the shutter; and a shutter which is provided around a periphery of the opening. A disk cartridge having a contact surface that directly or indirectly comes into contact with the flange when the opening is closed. 4. A cartridge body having an internal space capable of accommodating a recording disk and having an opening communicating with the internal space, and being slidable with respect to the cartridge body so as to open and close the opening. And a lock mechanism for maintaining a state in which the opening is closed by the shutter. The lock mechanism is swingable via a fixed portion fixed to the cartridge body and a spring portion. A disk cartridge comprising a lock body having a swinging part. 5. An internal space capable of accommodating a recording disk, a first opening communicating with the internal space from a first surface side, and a second opening from a second surface side opposite to the first surface. A cartridge body formed with a second opening communicating with the internal space, a first shutter slidable with respect to the cartridge body and capable of opening and closing the first opening, A second shutter slidable independently of the first shutter and capable of opening and closing the second opening. 6. When the first opening or the second opening is closed by the first shutter or the second shutter, the first shutter or the second shutter is moved relative to the cartridge body. 6. The disc cartridge according to claim 5, further comprising a thickness direction pressing means for pressing the cartridge body in a thickness direction. 7. In a state where the first opening or the second opening is closed by the first shutter or the second shutter, the first shutter or the radial direction of the recording disk with respect to the cartridge body. 7. The disk cartridge according to claim 5, further comprising a radial pressing unit that presses the second shutter. 8. A peripheral portion of the first shutter or the second shutter is provided with a flange protruding toward the cartridge body, and a periphery of the first opening or the second opening. The first shutter or the second shutter includes the first shutter.
The disk cartridge according to any one of claims 5 to 7, further comprising a contact surface that directly or indirectly comes into contact with the flange when the opening or the second opening is closed. 9. A state in which the first shutter or the second shutter closes the first opening or the second opening is maintained by a lock mechanism.
9. The disk cartridge according to any one of items 1 to 8, 10. A semiconductor device comprising a first case and a second case, wherein a projection is provided on a peripheral portion of one of the first case and the second case, and the other of the first case and the second case. The disk cartridge according to any one of claims 1 to 9, wherein a concave portion in which the convex portion fits is provided in a peripheral portion.