JPH10149657A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize and satisfy the opening/closing operability of a shutter through a slider and to improve the durability as to a disk cartridge utilizing the system to open the shutter including the slider to both directions, by attaining the stable production less in assembling failures at the time of automatic assemblage of the shutter and remarkably increasing the assemblability. SOLUTION: The disk cartridge is constituted in such a manner that the slider connected to the shutter consists of a 1st slider 6 and a pair of 2nd sliders 7, 7 inserted with pressure and held by a spring 8 to both ends of the 1st slider, and stopper projecting wall surfaces 23, 24 of the surface assembled with the 2nd slider or a case confronted with the 2nd slider are formed to the guiding slopes with a prescribed angle θ against the vertical surface, and a pair of sliders 7, 7 abutted thereon is incorporated to the case by separating each other to the outside direction from the end surface of the 1st slider against the pressing force of the spring 8. Thus, even though the slider is divided to the 1st slider 6 and 2nd slider 7, the temporary incorporation is ensured without the play by being inserted/held when a pair of 2nd sliders 7, 7 is always pressed in contact with the 1st slider and incorporated to the case, and also the generation of resin powder is prevented and the error in the molding dimension is absorbed, thereby the incorporation is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a disk-shaped medium,
More particularly, the present invention relates to a disk cartridge in which a double-sided or single-sided recordable / reproducible optical disk, a magneto-optical disk and the like are rotatably housed in a case.

[0002]

2. Description of the Related Art In general, an information medium, for example, a disk medium such as a magnetic disk, an optical disk or a magneto-optical disk is used as a disk cartridge housed in upper and lower cases. It is known that a shutter for opening and closing the opening is provided. However, conventionally, for a disk cartridge containing a disk-shaped medium capable of recording / reproducing on both sides, many methods of opening the shutter in both directions have been proposed. For example,
In Japanese Patent Publication No. Hei 7-153221, return spring members are provided on both sides of the sliding shutter independently to urge the shutter in the closing direction.

[0003]

However, in this double opening type construction, the assemblability of the shutter is not considered, and the assembling of the upper and lower cases, the shutter and the return spring is extremely difficult, and the mass productivity is extremely poor. For example, when incorporating a spring member before combining the upper and lower cases, if the spring is locked to the slider, it will come off the case due to the elastic force of the spring,
In the configuration where automation and labor saving of assembly are very difficult, and the upper and lower cases are combined and the spring is incorporated,
Although there is no problem described above, it is necessary to open a wide opening for inserting the spring on the front side of the case, there is a problem of intrusion such as dust inside, and the slider etc. are exposed to the outside, so the user can In addition to the problem of poor durability due to inadvertent touching and damage, the use of sliders also requires consideration of the generation of shavings, and when considering molding size errors, looseness may occur in combinations. If the parts are easily made thinner, the tendency is further increased, which may hinder the opening and closing operability of the shutter, making it difficult to reduce the size of the disk cartridge including the shutter, and having sufficient assemblability or operation reliability. It could not be said. SUMMARY OF THE INVENTION The present invention is intended to eliminate these conventional disadvantages, and provides a disk cartridge which has good shutter opening / closing characteristics, is easy to assemble, is compact, and has high operation reliability, even when the shutter of the disk cartridge is opened in both directions. Is to do.

[0004]

According to the present invention, a recordable / reproducible disk-shaped medium is rotatably housed in a case having an opening through which a recording / reproducing head or a drive shaft can be inserted. A disk cartridge comprising a shutter for opening and closing the opening, an upper plate and a lower plate, and a connecting plate for connecting the upper and lower plates in a substantially U-shaped section, and the shutter slidably provided via a slider. Wherein the slider slides by engaging a guide portion provided on the case, and slides by engaging a guide portion provided on the case, and holds the both ends of the first slider by springs. A pair of second sliders, the surface of which the second slider or the case facing the second slider is assembled is a guide inclined surface, and the pair of second sliders is moved to the first position against the urging force of the spring. Slider end face It is obtained by a configuration in which incorporated in the case by spaced apart from each other.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, the shutter has a substantially U-shaped cross section and slides over the front end of the upper and lower cases. A slider fixed to the shutter is provided with a guide on the inner surface of the case. The section guides sliding from the closed state to the open state of the shutter. The shutter is slidably guided by a first slider that slides and engages with a guide portion provided on the case, and a spring is movably disposed at substantially both ends in the width direction of the shutter inside the case. When the shutter moves to the left open position, the left second slider contacts the first slider and moves toward the closed position when the shutter moves to the left open position. A restoring force is applied, and the second slider on the right is in contact with the case. That is, the first slider is sandwiched between a pair of second sliders by a spring, and when the second slider cooperates with the first slider, the second slider is integrally connected to the first slider so that there is no slanting or rattling. It has good dynamic running properties, while the side fixed to the case has good fixing properties,
Moreover, the pair of second sliders can be assembled into one of the upper and lower cases in a state where they are engaged with both ends of the first slider against the spring elastic restoring force. A guide inclined surface is used as a mounting surface with the opposing case, and a pair of second
Since the sliders are separated from each other and assembled into the case, the shutter is securely fixed to the first slider after the upper and lower cases have been fixed, so that the shutter can be fixed to the first slider. The width can be improved, and the state of engagement and disengagement between the second slider and the first slider is also stabilized, so that the shutter can move smoothly, and is durable and can be used safely.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to an example of a disk cartridge accommodating an optical disk shown in FIGS. 1 to 7. A double-sided or single-sided recording / reproduction can be performed inside a case composed of an upper case 1 and a lower case 2. The disk-shaped medium 10 of a suitable information medium is rotatably accommodated, and the drive shaft insertion holes 11 and 21 and the head insertion holes 12 and 22 are formed in the case.
A cartridge provided with a shutter 4 for opening and closing the opening slidably in a shutter sliding area 5 one step lower than the outer surface of the case, wherein the shutter 4 includes an upper plate 41 and a lower plate 42.
And a connecting plate 43 for connecting the upper and lower plates 41 and 42 to have a substantially U-shaped cross section, and the shutter 4 includes a first slider 6 and a second slider 7 for sliding guide on the shutter 4. A spring 8 of an elastic member that urges the shutter 4 in the closing direction.
Which was equipped with a preparative, a first slider 6 which slides in engagement with the guide portion 9 provided on the case 1 to the shutter 4, engaged with the guide portion 9 ₁ provided on the case 1 A pair of second sliders which slide and are held by springs 8 at both ends of the first slider.
A slider 7 is provided, and an enclosing wall 72 for fitting an end of the first slider 6 on both sides of a spring engaging portion 71 provided on the second slider 7, for example, a cross section substantially reverse to cover the end of the first slider. An L-shaped wall is provided on both sides of the spring locking portion 71 as a center, and the second sliders 7, 7 are pressed against the first slider 6 so as to be freely separated from each other, and the respective second sliders 7, 7 are placed at the center of the case. And the shutter 4 is opened and closed in both directions by being pressed and fixed to a stopper protruding wall surface provided in the case along both edges of the opening.

The first slider 6 and the second slider 7 have a vertically symmetrical structure, and the second slider 7 holds the first slider 6 with a spring 8 and holds the same. Upper and lower cases 1 and 2
After fixing the shutter 4, the shutter 4 is fixed to the first slider 6. That is, the shutter 4 is fixed to the first slider 6 and moves at the same time. Second sliders 7, 7 are provided at both ends of the first slider 6 so as to sandwich the first slider 6.
The sliders 6 and 7 receive the elastic force of tension by the spring 8 and urge the first slider 6 to the closing position.

In this case, both ends of the first slider 6 are formed in a substantially U-shaped holding portion 61 having a gap through which the spring 8 is inserted.
The spring 8 is a tension coil spring, and the center of the coil spring 8 substantially coincides with the center of the portion covered by the surrounding wall 72 so that the shutter 4 can smoothly move. To

The stopper projection wall surfaces 23 and 24 of the second slider 7 or the surface of the case facing the second slider 7 are formed as guide inclined surfaces having a predetermined angle θ with respect to the vertical plane. A pair of second sliders 7,
The first slider 6 and the second slider 7 are separated from each other outwardly from the end surface of the first slider and are incorporated in the case in opposition to the urging force of the spring 8. The sliders 7, 7 are constantly pressed into contact with the first slider 6, and are caught when assembled into the case, so that there is no looseness and the assembling is ensured, the generation of resin powder can be prevented, and the molding dimensions can be reduced. The error can be absorbed and the integration can be simplified.

The second slider 7 is pressed by springs 8 against guide inclined surfaces of stopper projecting wall surfaces 23 and 24 at both ends of a connecting portion 25 provided at the front end side of the head insertion holes 12 and 22 of the case. The contact surface on the second slider 7 side is formed as a guide inclined surface, and the vertical or inclined stopper projecting wall surface 23,
Alternatively, the pair of second sliders 7 may be separated from each other in the outer direction by contacting the second sliders 24.

The first slider 6 comprises upper and lower cases 1 and 2
The spring 8 is disposed in a gap 26 between the connecting portions 25 formed on the front end side 28 of the head insertion holes 12 and 22 of the connecting portion 25.
The guide recess 67 of the first slider 6 is fitted to the first slider 6 so that it can slide freely. Further, a concave portion 66 formed in the first slider 6 and a connecting plate 43 of the shutter 4 are provided.
A guide projection 74 that fits into the square hole formed by the above, such as a supporting rod or a rod-like member, and a plate-like guide 75 that fits into the concave portion 27 or the concave groove provided on the inner surface of the case, for example, the mating surface of the upper and lower cases. Are provided in the second slider, respectively, to help the sliding of the second slider 7 and the first slider 6 and to increase the holding function on the fixed side.

In this case, the second slider 7 has the first
Protruding the guide projections 74 and the guides 75 on both sides of the mating abutment surface to be joined to the slider 6 with good spacing provides good balance and good assemblability. In addition, it is considered that the guide projection 74 and the recess 66 have a tapered surface so as to be easily fitted. Further, the guide 75 is preferably provided on a spring engaging portion 71 formed on the second slider 7. Since a holding portion 61 having a substantially U-shaped cross section having an interval for inserting the spring 8 is provided at both ends of the first slider 6, a spring engaging portion 71 of the second slider is provided at an interval between the holding portions 61. Is suitable as a holding portion of the second slider 7 that is left on the stopper protruding wall surface 23 in a form in which it is fitted and disposed.

Further, a lower shutter sliding area 5 of the case in which the shutter 4 slides is provided with a guide 3 by a fixing means such as fusion or adhesion to hold the free ends of the shutter upper and lower plates, thereby providing the upper and lower casings. The first slider 6 provided on the shutter 4 that slides across the front side ends of the shutters 1 and 2 has reinforcing portions 62 at both ends for reinforcing the projecting portion 44 of the shutter to which the shutter opening / closing operation member contacts. Mounting hole 45 provided
It is preferable to provide a protruding portion 63 that fits into the projection.

As shown in FIGS. 2 to 4, the first slider 6 has a U-shaped holding portion 61 on both sides of which the second slider 7 abuts. The spring 8 is inserted into the gap between the U-shaped holding portions 61, and a projection 63 is provided in the middle of the spring 8. The projection 63 enters the projection 44 of the shutter 4, and is further moved by the elastic arm 65 between the two projections 63. Fixed to 4. FIG.
Is a detailed view of the second slider 7. The second slider 7 has a spring locking portion 71 for locking the spring 8 and an enclosing wall 72 that wraps the U-shaped portion 61 of the first slider 6 from the outside. together with a, a rail 73 is fitted into the guide 9, 9 ₁ of the case inner surface, and projecting the支杆74 that fits into the recess 66 of the first slider 6, a first slider 6 second slider 7 are integrated to make the movement of the shutter 4 smooth, and the durability is also improved.

With such a structure of the first and second sliders 6 and 7, when the shutter 4 is opened, the first slider 6 and the second slider 7 can be opened and closed integrally. During assembly, the first slider 6, the second slider 7 (two pieces), and the spring 8 are temporarily assembled and easily assembled into the lower case 2 (one of the upper and lower cases). Can be inserted into the head insertion hole 1 of the case.
2, the gap 2 in the connecting portion 25 provided on the front end side 28 of
It is preferable that the spring 8 is housed in the guide 6 and the guide recess 67 of the first slider 6 is fitted from both ends of the connecting portion 25 so that the guide slides easily. Furthermore, the first wall covered by the surrounding wall 72
The pressed portion at the end of the slider 6 is formed as a holding portion 61 having a substantially U-shaped cross section so as to cover the coil spring 8, and the surrounding wall 72 is made substantially coincident with the center of the coil spring 8, so that the temporary assembly during assembly is stable. Operation and the opening and closing of the shutter 4 after assembly stabilizes the operation. Since the upper and lower cases 1 and 2 have substantially the same shape, the lower case 2 has been described, but the same applies to the upper case 1.

The shutter 4 is fixed to the first slider 6, for example, from the closed state to the open state of the shutter 4 by the convex guide portion 64 of the first slider 6 and the guide portion 9 on the inner surface of the case. Guide sliding. In addition, two erroneous erasure preventing members 13 for selectively setting whether or not recording on the disk is possible are provided inside the case so as to be independently movable for the upper surface and the lower surface of the disk. In addition,
The shutter 4 is formed by injection molding using a polyacetal resin or the like to have a substantially U-shaped cross section. However, if a resin is used, a metal (for example, stainless steel or surface-treated aluminum) is used.
In comparison with the conventional method, there are advantages that it is inexpensive, lightweight, and can be made relatively easily even with a complicated shape.

In the figure, 19 is a label area, and 20 is a positioning hole for a disc cartridge.

[0018]

According to the present invention, a recordable / reproducible disk-shaped medium is rotatably housed in a case having an opening through which a recording / reproducing head or a drive shaft can be inserted, and the opening is provided. The upper and lower plates are shutters that open and close,
A disk cartridge having a substantially U-shaped cross section from a connecting plate connecting the upper and lower plates, the shutter being slidably provided via a slider, and a spring for biasing the shutter in a closing direction. A first slider slidable by engaging the slider with a guide portion provided on the case, and slidingly engaging and engaging a guide portion provided on the case with springs at both ends of the first slider. A pair of second sliders, the surface of which the second slider or the case facing the second slider is assembled is a guide inclined surface, and the pair of second sliders is moved to the first position against the urging force of the spring. By being configured to be separated from each other on the slider end surface and incorporated into the case, the slider can be incorporated into one of the upper and lower cases in a state where it is engaged with both ends of the first slider against the spring elastic restoring force. 1 sla Since the second slider and a spring in Da and its opposite ends can also be previously assembled stable,
The assembly can be assembled in the lower case or the upper case, and then the other case can be combined and fixed, so that the assemblability can be greatly improved. The slider is always in pressure contact with the case side and is caught when assembled into the case, so that there is no play during transportation, resin powder can be prevented, and errors in molding dimensions can be absorbed, simplifying assembly, In the automatic assembling, it is possible to produce a stable production with a small assembly defect, and to stabilize the temporary assembling during the assembling with the downsized shutter mechanism including the first slider and the second slider, and to use an inexpensive shutter material. The shutter can be opened and closed in one direction or both sides, and the shutter opening / closing operability is improved, the durability is improved, and the shutter is downsized. It can have high disk cartridge reliable by the shutter opening and closing operation in configuration.

[Brief description of the drawings]

FIG. 1 is a perspective view of a separated state showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of the shutter of FIG. 1 in a separated state.

3A and 3B show a first slider of the example of FIG. 2, wherein FIG. 3A is a front view, FIG. 3B is a longitudinal sectional view taken along line AA, FIG. 3C is a plan view, FIG. e) is a bottom view.

FIG. 4 is a perspective view of the example of FIG. 3, (a) is an overall perspective view,
(B) is a partial perspective view cut from the center.

5 (a) is a plan view, FIG. 5 (b) is a front view, FIG. 5 (c) is a cut-away plan view taken along line BB, and FIG. It is a perspective view.

FIGS. 6A and 6B show a state in which a shutter is incorporated and the upper and lower cases are removed, wherein FIG. 6A is a partially cut plan view and FIG. 6B is a front view.

FIG. 7 is an enlarged vertical sectional view taken along line CC of FIG. 6;

FIGS. 8A and 8B are partially enlarged views of a slider and a case, in which FIG. 8A is a perspective view of the slider and the case, and FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Upper case 2 Lower case 3 Guide 4 Shutter 5 Shutter sliding area 6 First slider 7 Second slider 8 Spring 9, 9 ₁ Guide part 10 Disk 11, 21 Drive shaft insertion hole 12, 22 Head insertion hole 13 Erroneous erasure prevention Member 20 Positioning hole 23, 24 Stopper protruding wall surface 27 Concave portion 41 Upper plate 42 Lower plate 43 Connecting plate 44 Projecting portion 61 U-shaped holding portion 62 Reinforcement portion 63 Projecting portion 64 Guide portion 66 Recessed portion 71 Spring locking portion 72 Enclosure wall 73 Rail 74 Guide protrusion 75 Guide

Claims (4)

[Claims] 1. A recording / reproducing disk-shaped medium is rotatably housed in a case having an opening through which a recording / reproducing head or a drive shaft can be inserted, and a shutter for opening and closing the opening is provided. In a disk cartridge having an upper plate, a lower plate, and a connecting plate for connecting the upper and lower plates and having a substantially U-shaped cross section, the shutter is slidably provided via a slider. A first slider slidable by engaging a guide portion provided, and a pair of second sliders slidably engaged by a guide portion provided on a case and held by springs at both ends of the first slider. The second slider or the surface facing the case facing the second slider is a guide inclined surface, and the pair of second sliders are separated from each other on the first slider end surface against the urging force of the spring. Case A disk cartridge characterized in that it is incorporated in a disk cartridge. 2. The disk cartridge according to claim 1, wherein said second slider is spring-pressed to guide inclined surfaces at both ends of a connecting portion provided at a front end side of a head insertion hole of a case. 3. The first slider has a spring disposed in a gap between connecting portions formed at a front end side of a head insertion hole of a case, and a guide recess of the first slider is fitted into the connecting portion. The disk cartridge according to claim 1 or 2, wherein: 4. The first slider is provided with a substantially U-shaped cross-section holding portion having an interval for inserting the spring at both ends thereof,
4. The disk cartridge according to claim 1, wherein a spring locking portion of the second slider is fitted and disposed in a space between the holding portions.