JPH0814955B2 - Disco Cartridge - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly to a disk cartridge having an erroneous erasure prevention mechanism for preventing erroneous erasure of information recorded on a disk-shaped recording medium. .

[Conventional technology]

As a conventional disk cartridge, for example,
There are those disclosed in JP-A-59-138066 and JP-A-60-163287.

FIG. 10 is a cross-sectional view of the essential parts of the former configuration. In the figure, 30 is the lower half of the cartridge case, 31
Is a long hole provided in the lower half 30, 32 is a wall formed in a corner of the lower half 1, 33 is a pair of recesses provided on the lower side of the wall 32 near the center of the case, and 34 is a wall 32 Movers, 35a and 3 arranged so as to be reciprocally movable in a space partitioned by
5b is an elastic portion provided in the longitudinal direction of the wall 32 so as to project from the upper and lower portions of the mover 34, and 36a and 36b are elastic portions 35a and 35b.
The protrusions 37 formed on the ends of the recesses 33 and engaging with the protrusions formed on both ends of the recess 33 are formed on the upper half and the long holes 31 are formed.
Is a hole having an opening that matches the left half of the.

With the above configuration, the state shown in FIG.
Due to this, the hole 37 is hidden, the hole 37 and the long hole 31 do not communicate with each other, and the optical signal for detection does not penetrate the disk cartridge, so new recording is not permitted.

Next, when the mover 34 is moved to the right in the figure, the protrusion 36
The movable element 34 is set to a stable position in a state in which the movable element 34 rides on the protrusion on the right side of the concave portion 33. In this state, the elastic parts 35a and 35b
The space between them overlaps the hole 37, and the hole 37 and the long hole 31 communicate with each other. As a result, a through hole is formed in the disk cartridge through the hole 37, light from the light emitting element reaches the light receiving element, and a detection signal is generated. A write enable signal is generated based on this signal.

When moving the mover 34, the tip of the finger or the like is used.

[Problems to be solved by the invention]

However, in the case of the conventional disk cartridge, the one having an asymmetrical shape in a part of its constituent parts when constructing the erroneous erasure prevention mechanism Since the lower surface, in the case of JP-A-60-163287, had no choice but to use an erroneous erasure prevention claw, etc., automation in the assembly process was not easy. Further, in the case of the structure as disclosed in JP-A-59-138066, the upper surface 15 of the mover 14 is located at the lower half 1b.
Since it is exposed on the surface of the movable body 14, the mover 14 is apt to be moved by mistake during use, and there is a risk of erasing valuable data by mistake.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and an object of the present invention is to provide a disk cartridge which facilitates automation of assembly and can surely prevent erroneous erasure. It is in.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a disk cartridge which rotatably accommodates a disk-shaped recording medium by an upper case and a lower case and enables recording and reproduction on the disk-shaped recording medium. Round holes for detection that are opened in each of the cases by matching the positions of
An elliptical groove communicating with each of the round holes and formed on the inner surface of the round hole, a slit formed in the center of one of the grooves in the longitudinal direction, and reciprocally fitted into each of the grooves. And a mover having symmetrical ends.

[Action]

According to the above-mentioned means, since the mover is formed in a symmetrical shape, there is no restriction on the front and back sides, and a disk cartridge which can be easily automated can be constructed.

〔Example〕

The disk cartridge according to the present invention will be described in detail below.

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing essential parts, and FIGS. 3 (a) and 3 (b) are plan views showing details of groove shapes, FIG. 4 and FIG. FIG. 5 is a plan view showing the inner surfaces of the upper case and the lower case, FIGS. 6 and 7 are explanatory views of the operating position of the mover according to the present invention, and FIGS. 8 and 9 are erroneous erasing mechanisms according to the present invention. FIG.

As shown in FIG. 1, a disk cartridge ridge is composed of the cartridge ridge case 1 and the cartridge ridge case 2.
A disk-shaped recording medium (not shown) is rotatably loaded between the cases. On the surfaces of the cases 1 and 2, there is arranged a shutter 3 capable of exposing a predetermined portion of the disk-shaped recording medium in the radial direction, and the shutter 3 is provided by a slider 4 provided on a side portion of the disk cartridge. The opening / closing operation is performed. The shutter 3 is provided with a shutter guide plate 5 for guiding the movement thereof. Positioning holes 6 and 7 are provided adjacent to the guide plate 5 for setting the disc cartridge mounted on the apparatus at a predetermined position.

Light protector holes 9 and 10 are provided adjacent to the positioning holes 6 and 7, respectively. As shown in FIG. 2, the protector holes 9 and 10 have an inner diameter defined by the standard of the disc cartridge, and an elliptical ride protector moving groove 17 is provided on each inner surface. Further, the light protector hole 10 is provided with a slit 12 in the longitudinal direction at the center of the groove 17.

A light protector 11 as a mover is arranged via the slit 12 so as to be reciprocally movable in a space formed between the grooves 17 by using a tip portion of a ballpoint pen or the like. As shown in FIG. 2, the light protector 11 has a length and a groove that are loosely fitted to the height between the grooves 17 provided in each of the pair of cases.
End portions 11a having a diameter slightly smaller than 17 and these end portions 11a
And a elastic portion 11c formed so as to project at a predetermined interval in a direction perpendicular to the body portion 11b. A recess 11d is formed on the surface of the end 11a on the side of the protector hole 10 so that the recess 11d is exposed to the protector hole 10 and the slit 12 so that the pen tip or the like can be contacted from the outside. The elasticity 11c has an appropriate elasticity in its thickness direction, and a projection 11e is provided at the tip thereof.

A wall 13 is formed along the straight portion of the groove 17 and the protector holes 9 and 10, and the projections 15a, 15b and 16 are formed close to the groove 17.
A and 16b are formed as shown in FIGS. 2 and 3. The protrusions 15a and 15b are the end portions 11 of the light protector 11.
When a is located in the protector holes 9 and 10, it abuts the protrusion 11e, and when the end 11a is at the farthest position from the protector holes 9 and 10, the protrusions 16a and 16b abut the protrusion 11e. Reference numeral 14 denotes an opening provided in the lower portion of the shutter 3 of the case 2 so that the head can face the disk-shaped recording medium.

As shown in FIGS. 4 and 5, the upper case 2 and the lower case 1 have the same shape, and after the disk-shaped recording medium is loaded, the pair of cases with attached accessories are fitted in the same direction. It is integrated by the inclusion, and the disk cartridge ridge is completed.

In the above construction, when assembling, the back surface of the case 1 is placed on a flat surface, and a disk-shaped recording medium (for example, a magnetic disk) is set at the center thereof. Next, the light protectors 11 are arranged in the holes 9 and 10 of the case 1 as shown in FIG. 3 (a).

Next, the slider 4 is set to the slot 20 shown in FIG. After this, the case 2 is fitted into the case 1, and screws are fixed through the screw holes 21 to 24.

Next, the shutter guide plate 5 is mounted and the shutter 3 is fitted to complete the disk cartridge.

Since the light protector 11 has a symmetrical shape,
There is no distinction between the front and back. Therefore, no special consideration is required when mounting the parts. The light protector 11 is set to the state shown in FIG. 6 or 7 after the disc cartridge is completed. In the state shown in FIG. 6, the end portion 11a
Obscures the holes 9 and 10 for detection. At this time, the elastic portion 11
c is the right side of the protrusions 15 and 15 'and the light protector 1
Holds 1 FIG. 8 shows a sectional view of the state of FIG.

On the other hand, in the state shown in FIG. 7, the end portion 11a of the light protector 11 is located at the other end of the groove 17 farthest from the holes 9 and 10, the light protector holes 9 and 10 are opened, and the light for detection passes through. Has been enabled. At this time, the elastic portion 11c contacts the protrusions 16 and 16 'on the left side and holds the protector 11. FIG. 9 shows the state of FIG.

The light protector (actuator) 11 can be formed by resin molding, and as a material thereof, polyacetal, polyethylene having good elasticity and moderate elasticity,
Polypropylene, nylon, etc. can be used.

〔The invention's effect〕

As described above, according to the disk cartridge of the present invention, since the actuator and the like have a symmetrical shape, it is not necessary to identify the front and back when assembling, and workability can be improved. In addition, since the actuator is not exposed more than necessary during use, it does not move carelessly and the reliability against erroneous erasure is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing an essential part of the present invention, and FIGS. 3 (a) and 3 (b) show details around the groove 17 in the present invention. Top view, FIGS. 4 and 5
The drawings are plan views showing the inner surfaces of the upper case and the lower case, FIGS. 6 and 7 are explanatory views of the operating position of the light protector 11 according to the present invention, and FIGS. 8 and 9 are FIGS. 5 and 6. FIG. 10 is a sectional view in each state of FIG. 10, and FIG. 10 is a sectional view showing a conventional disk cartridge. 1,2 ... Cartridge case, 3 ... Shatter, 4 ...
Slider, 9,10 …… Light protector hole, 11 …… Light protector, 11a …… End, 11b …… Body, 11c…
… Elastic part, 11d …… Concave, 12 …… Slit, 13 …… Wall, 1
1e, 15a, 15b, 16a, 16b …… Protrusion, 17 …… Groove.

Claims (2)

[Claims] 1. A disk cartridge which rotatably accommodates a disk-shaped recording medium by an upper case and a lower case and enables recording and reproduction on the disk-shaped recording medium so that their positions are matched with each other. A round hole for detection opened in each of the cases, an elliptical groove communicating with each of the round holes and formed on the inner surface of the round hole, and formed in the center of one of the grooves in the longitudinal direction. A disk cartridge including a slit and a mover having a symmetrical end portion reciprocally fitted in each of the grooves. 2. The mover includes a cylindrical portion having an end portion having a diameter capable of being fitted into the groove, and a pair of elastic portions horizontally connected to a body portion of the cylindrical portion with a predetermined interval. The disk cartridge according to claim 1, which is composed of: