JPH0795389B2 - Disco Cartridge - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly, to a shape of a shutter for closing a window hole formed in the cartridge case when not in use and a disk drive device. The present invention relates to a forming position of engaging means for engaging the provided shutter opening / closing lever.

[Conventional technology]

A disk cartridge that is mounted on a recording / reproducing apparatus and has a disk-shaped recording medium housed in a cartridge case for recording / reproducing information by magnetic means or optical means has a spindle for rotationally driving the disk-shaped recording medium. Further, a window hole for inserting a head for recording / reproducing information via the disk-shaped recording medium is provided. Therefore, if the window hole is always opened, dust may adhere to the disk-shaped recording medium when not in use, or fingers or foreign matter may come into contact with the disk-shaped recording medium during handling, resulting in the disk-shaped recording medium. There is a risk of soiling or damaging the surface of the.

In order to prevent such an accident, there has been conventionally known a disk cartridge which is provided with a shutter for closing the window hole when not in use to prevent foreign matter from entering.

The applicant of the present application has previously attached a slider 33 to a guide rail 32 extending along the front edge of the cartridge case 31 as a disk cartridge of this type, as shown in FIG. It has been proposed that a shutter 34 be attached to the Japanese Patent Application No. 60-224508 (Japanese Patent Application Laid-Open No. 62-8257).
No. 8))).

As shown in FIG. 14, the shutter 34 is formed by bending a thin metal plate such as stainless steel into a U shape so that the window hole 35 formed in the cartridge case 31 can be covered with a width and a length. There are formed an upper piece 34a and a lower piece 34b, and a front piece 34c having a width substantially equal to the thickness of the cartridge case 31. The front piece 34c side of the upper piece 34a and the lower piece 34b is formed wider than the tip by extending the side of the return side in the right angle direction, and the front side formed with the same width as this.
It is connected to 34c. In the front side 34c, when the shutter 34 is set at the window hole closing position of the cartridge case 31, the front side 34c is located at the end on the moving side of the center line YY corresponding to the center line OO of the window hole 35. A through hole 36 having a width narrower than the width of the piece 34c is formed, and two screw insertion holes 37, 37a are formed in a substantially central region.

As shown in FIG. 15, the slider 33 is made of a synthetic resin having excellent lubricity such as polyacetal, and is formed in a prismatic shape having a length substantially equal to the width W of the front piece 34c of the shutter 34. At the symmetrical positions on the upper and lower surfaces thereof, concave grooves 38, 38a into which the guide rail 32 erected along the front edge of the cartridge case 31 can be fitted can be formed. Further, on the front surface of the slider 33, there are a hook hole 39 corresponding to the through hole 36 formed in the shutter 34, and screw holes 40, 40a corresponding to the screw insertion holes 37, 37a formed in the shutter 34. Opened.

The slider 33 is slidably attached to the front edge of the cartridge case 31 by straddling the groove 38, 38a on the guide rail 32. In addition, the shatter 34 is an upper piece 34a.
And the lower piece 34b are superposed on both sides of the cartridge case 31, respectively, and the back surface of the front piece 34c is brought into contact with the slider 33 and the front surface to form the through hole 3
6 and hook hole 39, screw insertion holes 37, 37a and screw holes 40, 40
After matching a, screw 41, screw 41, from the outside of 37a
By screwing 41a into the screw holes 40, 40a, the slider 3
Stuck on 4. Further, the tip end portion of the shutter 34 is movably held by the pressing plate 42 in the cartridge case 31.

The disk cartridge described above proposed by the applicant of the present application has the shutter 34 attached to the cartridge case 31 via the slider 33 made of synthetic resin having excellent lubricity. The cartridge case is not abraded by the metallic shutter, and it is possible to prevent the abrasion powder from adhering to the disk-shaped recording medium, the defective operation of the shutter, and the generation of abnormal noise. Also, the front piece 34 of the shatter 34
Since the width W of c is formed to be wider than the width of the upper piece 34a and the lower piece 34b, and is attached to the cartridge case 31 via the slider 33 formed to have a length substantially equal to the width of the front piece 34c, It is characterized in that the contact length between the guide rail 32 and the slider 33 becomes large and the operating stability of the slider 33, that is, the shutter 34 becomes good.

[Problems to be solved by the invention]

However, the following problems were found in the actual manufacture of the above disk cartridge.

That is, since the width W on the front piece 34c side of the upper piece 34a and the lower piece 34b of the shutter 34 is formed wider than the front end portion, it is possible to remove the material when punching the work that is the source of the shutter 34 from the sheet-shaped metal original plate. Is inefficient, and the manufacturing cost of the shutter 34 and thus of the disk cartridge becomes high.

In addition, a hook hole 39 and a shutter 34 recessed in the slider 33 are provided.
By overlapping the through hole 36 formed in the disk drive, an engaging means for engaging the shutter opening / closing lever provided in the disk drive is formed. Then it is difficult to strictly open the through hole 36 at a position corresponding to the hook hole 39 of the shutter 34,
When the shutter 34 is attached to the slider 33, the through hole 36
If the hook holes 39 and the hook holes 39 are displaced from each other and the aesthetic appearance of the product is deteriorated, or the accuracy of engagement between the shutter opening / closing lever and the engaging means varies, a problem may occur. Further, when precision sheet metal processing is performed on the shatter 34 to prevent such a problem, some problems arise when the manufacturing cost of the shatter 34 becomes high.

[Means for solving the problem]

The present invention aims to reduce the manufacturing cost of the disk cartridge by simplifying the shape of the shutter, and at the same time, to prevent the positional deviation between the through hole and the hook hole and to prevent the problems, the slider is attached to the front piece of the shutter. The shutter opening / closing lever provided in the disk drive device is engaged with the protrusion of the slider that is formed longer than the length and protrudes outward from the side of the shutter when the slider and the shutter are combined together. It is characterized in that an engaging means for fitting is formed.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 12.

First, referring to FIG. 1, a schematic structure of a disk cartridge according to the present embodiment will be described. The disk cartridge is mainly composed of a synthetic resin cartridge case 1.
A disk-shaped recording medium 2 rotatably housed in the cartridge storage case 1, and the cartridge storage case 1.
The slider 3 is slidably attached to the front edge of the slider, and the shutter 4 is attached to the slider 3.

The cartridge case 1 is composed of a lower case 6 and an upper case 7. By connecting the two cases 6 and 7 with a plurality of screws (not shown), the disk-shaped recording medium 2 and other structures are formed. A space for housing the component is formed.

As shown in FIG. 2, on the inner surface of the lower case 6, a joining wall 8 having a constant height is provided upright on the peripheral edge excluding the front edge portion (the insertion side into the disk drive). A guide ridge 9 having a height lower than this is erected in a straight line. Also,
On the inner peripheral surfaces of the joining wall 8 and the guide protrusion 9 of the lower case 6, a circular partition wall 10 having the same height as the joining wall 8 is provided upright. Further, a window hole 11 for inserting the spindle and the recording / reproducing head is formed in a portion from the central portion to the front edge of the lower case 6. Further, at the front edge of the lower case 6, there is provided a recess 12 for inserting a shutter opening / closing lever provided in a drive device for mounting the disk cartridge, and one end of the front edge is provided. To the side,
A return spring retaining pin 13 is provided upright.

As shown in FIG. 3, the upper case 7 is basically formed in the same shape and size as the lower case 6, but there is nothing corresponding to the recess 12 of the lower case 6, and the lower case A small hole 13a for inserting the tip portion of the pin 13 is formed at a position corresponding to the return spring retaining pin 13 of 6.

As shown in FIG. 4, the shutter 4 is formed by bending a thin metal plate such as stainless steel into a substantially U-shape. The upper piece 4a and the lower piece 4b among the constituent parts of the shutter 4 are formed to have a width and a length capable of covering the window hole 11 opened in the cartridge case 1, and the tip of the lower case 6 and A pressing portion 4d for contacting the surface of the upper case 7 is formed. This upper piece 4a and lower piece 4b and front piece
As shown in detail in Fig. 5, the connecting part with 4c is about 1mm.
A chamfer 5 of about the width is applied, and along with this, the front piece 4c
The width s is smaller than the width S of the upper piece 4a and the lower piece 4b. At the center of the front piece 4c, an inwardly stepped portion 14 is provided as shown in FIG. In the step portion 14,
As shown in FIG. 7, the center line A of the upper piece 4a and the lower piece 4b is
-A through hole 15 is opened on A and notches are formed on both sides of it.
16,16a is cut. Needless to say, the lateral width d of the front piece 4c is formed to be substantially equal to the thickness T of the cartridge case 1.

As shown in FIG. 8, the slider 3 is formed into a substantially prismatic shape that can be fitted between the upper piece 4a and the lower piece 4b of the shutter 4, and the lower case is provided at opposite positions on both sides. 6 and guide grooves 9 projecting along the front edge of the upper case 7 are provided with concave grooves 18, 18a for slidably fitting. Further, on the front surface 3a facing the front piece 4c of the shutter 4,
Two locking claws with a space substantially equal to that of the cutouts 16 and 16a.
19, 19a are provided in a protruding manner, and a protrusion 20 capable of being tightly inserted into the through hole 15 is provided in a position between the two locking claws 19, 19a corresponding to the through hole 15. Also, as shown in FIG.
When the locking claws 19 and 19a are engaged with the notches 16 and 16a,
The slider 3 protruding outward from the side portion of the shutter 4
On the front surface of the projecting portion 3a, a recess 21 for inserting a shutter opening / closing lever is provided so as to penetrate from the substantially central portion to one side.
As shown in FIG. 10, a hooking pin 23 for hooking one end of the shutter return spring is provided at the tip of the protrusion 3a.

The slider 3 can be formed of any material such as a synthetic resin having excellent lubricity such as nylon, tetrafluoroethylene, polyethylene, polyacetal, polypropylene, or a metal material having excellent lubricity.

As shown in FIG. 11, the slider 3 is provided with the recessed grooves 18 and 18a on the guide ridge 9 so that the cartridge case 1 can be provided.
Is slidably attached to the front edge of the. Further, in the shutter 4, the upper piece 4a and the lower piece 4b are superposed on both surfaces of the cartridge case 1, respectively, and the rear surface of the front surface 4c is moved to the front surface 3a of the slider 3.
And a locking claw that abuts on the front surface 3a of the slider 3
By engaging 19, 19a with the notches 16, 16a of the shutter 4, it is fixed to the slider 3 by one touch.
At this time, the projection 20 projecting from the front surface 3a of the slider 3 is inserted into the through hole 15 formed in the shutter 4, and the relative movement between the members 3 and 4 is restricted. A holding portion 4d formed at the tip of the shutter 4 is movably held by a holding plate 24 as shown in FIG. The slider 3 and the shutter 4 are composed of a return spring retaining pin 13 provided on the cartridge case 1 and a retaining pin provided on the slider 3.
A return spring (not shown) stretched between 23 always biases the window hole 11 in the closing direction. Shattered 4
The stop position of the shutter 4 is brought into contact with the start end 9a of the guide ridge 9 provided upright on the front edge of the lower case 6 and the step 3b formed on the slider 3, so that the shutter 4 and the cartridge case It is regulated not to collide directly with 1.

When the disk cartridge constructed as described above is inserted into the disk drive, for example, when the A side of the disk cartridge is inserted toward the recording / reproducing head side, as shown in FIG. Of the two shutter opening / closing levers 25, 25a provided in the apparatus, the shutter opening / closing lever 25 for the A surface is recessed in the slider 3
When the disc cartridge is inserted into the disc 21, the shutter 4 is sequentially moved to the right side in the drawing as the disc cartridge is inserted. At this time,
The shutter opening / closing lever 25a for the B side is initially contacted with the front edge portion of the disk cartridge, and sequentially moves to the left side in the drawing as the disk cartridge is inserted, and slides on the front piece 4c of the shutter 4. To do. In this case, the chamfer 5 is provided at the connecting portion between the upper piece 4a and the lower piece 4b of the shutter 4 and the front piece 4c, so that the shutter opening / closing lever 25 for the B side can move from the front edge of the disk cartridge to the shutter 4a. When moving to the front piece 4c, it can be easily ridden and there is no problem such as poor usability. In this way, when the disk cartridge is inserted to the predetermined position of the disk drive device, the window hole 11 is completely released.

When the B side of the disk cartridge is inserted toward the recording / reproducing head side, the shutter opening / closing lever engaged with the recess 21 is replaced by the B side shutter opening / closing lever 25a. Is the same.

In the disk cartridge of the above-mentioned embodiment, the width s of the front piece 4c is formed slightly narrower than the width S of the upper piece 4a and the lower piece 4b. There is almost no waste in material removal when punching,
It is possible to reduce the manufacturing cost of the shutter 4 and thus of the disk cartridge. Further, since the projection 3a of the slider 3 projecting outward from the side of the shutter 4 is provided with the recess 21 for engaging the tip of the shutter opening / closing lever, the shutter 4 and the above-mentioned recess are formed as in the conventional case. Problems such as the position of the portion 21 not matching do not occur. further,
Both members 3, 4 can be integrated by simply engaging the locking claws 19, 19a protruding from the slider 36 with the notches 16, 16a formed in the shutter 4. Installation work is greatly simplified. Further, since the projection 20 projecting from the front surface 3a of the slider 3 is fitted into the through hole 15 formed in the shutter 15 slightly tightly, the slider 3 and the shutter 4 can be relatively moved. Moreover, since an unreasonable external force does not act on the locking claws 19 and 19a, an accident such as breakage of the locking claws 19 and 19a does not occur. In addition, a step is formed on the front piece 4c of the shutter 4.
Since 14 is formed, the locking claws 19 and 19a and the projection 20 do not project to the outside of the cartridge case, and there is no problem such as interference with devices in the drive device.

The present invention relates to the shapes of the slider and the shutter, the shape of the disk cartridge, the type of the disk-shaped recording medium housed in the disk cartridge,
The materials of the slider and the shutter, and the means for attaching the cartridge case and the slider are not limited to those in the above-mentioned embodiments, but can be designed and selected arbitrarily.

〔The invention's effect〕

As described above, in the disk cartridge according to the present invention, the width of the front piece of the shutter is formed to be slightly narrower than the width of the upper piece and the lower piece. There is almost no waste in material removal when punching, and it is possible to reduce the manufacturing cost of the shutter and eventually the disk cartridge. In addition, since the recessed portion for engaging the tip of the shutter opening / closing lever provided in the disk drive device is provided in the protruding portion of the slider protruding outward from the side portion of the shutter, the slider and the shutter are not separated from each other. Alignment can be facilitated.

[Brief description of drawings]

FIG. 1 is a perspective view showing the entire structure of a disk cartridge according to the present invention, FIG. 2 is a plan view seen from the inside of a lower case, and FIG. 3 is a plan view seen from the inside of an upper case. The figure is a perspective view of the shutter, FIG. 5 is a sectional view of the shutter of FIG. 4, FIG. 6 is a side view of the shutter of FIG. 4, and FIG.
FIG. 8 is a plan view of the shutter, FIG. 8 is a perspective view of the slider, FIG. 9 is a perspective view showing a mounting state of the slider and the shutter, FIG. 10 is a side view of the slider of FIG. 8, and FIG. FIG. 12 is a cross-sectional view of a main part of a disk cartridge having a shutter attached thereto, FIG. 12 is a plan view of the main part for explaining the operation of the slider and the shutter, and FIG. 13 is a perspective view of the disk cartridge previously proposed by the applicant of the present application. FIG. 14 is a perspective view of the previously proposed shutter, and FIG. 15 is a perspective view of the previously proposed slider. 1: Cartridge case, 2: Disk-shaped recording medium, 3: Slider, 4: Shutter, 4a: Upper piece, 4b: Lower piece, 4c: Front piece, 6: Case, 7: Upper case, 9: Guide ridge , 11: window hole, 18, 18a: concave groove, 19, 19a: locking claw, 20: protrusion, 21: concave portion

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Aizawa 1-88, Tora, Ibaraki, Osaka Prefecture Hitachi Maxell Co., Ltd. (72) Inventor Masahiro Suzuki 1-88, Tora, Ibaraki, Osaka Hitachi Maxel Co., Ltd.

Claims (1)

[Claims] 1. A cartridge case, which comprises an upper case and a lower case and has window holes for inserting a spindle and a head on both sides, and a disk shape rotatably housed inside the cartridge case. A disk cartridge comprising a recording medium, a slider slidably mounted along the front edge of the cartridge case, and a shutter that slides with the slider to open and close the window hole. The slider is formed in a length longer than the length of the front piece of the shutter, and when the slider and the shutter are integrally combined, the protrusion of the slider protrudes outward from the side of the shutter, and is provided in the disk drive device. A disk cartridge including an engaging means for engaging the shutter opening / closing lever.