JP2998341B2 - Disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge and, more particularly, to an improvement in a mechanism for preventing erroneous erasure.

[0002]

2. Description of the Related Art In a conventional magneto-optical disk cartridge as a disk cartridge, a magneto-optical disk D is rotatably housed between an upper half 3 and a lower half 4 constituting a cartridge body 2 as shown in FIG. In addition, an optical head provided on each of the halves 3 and 4 and a shutter 6 covering a window hole 5 facing the magnetic head are slidably mounted in the left and right direction. An erroneous erasure prevention mechanism is provided to prevent erroneous erasure of the cartridge. This erroneous erasure prevention mechanism is provided to be movable in the left-right direction in an opening 7 formed in the back wall of the cartridge body 2. A detection member (hereinafter referred to as a detection member) 8 and a lower surface of the cartridge body 2, that is, an erroneous erasure prevention detection hole (hereinafter referred to as a detection hole) formed in And a) 9.

The detected member 8 of the erroneous erasure prevention mechanism includes a detection hole 9, a base portion 8a, and first to third engaging projections 8b, 8d extended from an end of the base portion 8a. 8e, the inner surface of the first engaging projection 8b located on the outside slides on the supporting piece 10 arranged on the cartridge body 2,
The distal end projections of the intermediate second engagement projection 8d and the inner third engagement projection 8e are engaged with the engagement piece 11 arranged substantially parallel to the support piece 10 on the cartridge body 2. On one surface of the engaging piece 11 of the cartridge main body 2, concave portions 11 a, 1, into which the tip projecting portions of the third engaging projecting pieces 8 e of the detected member 8 fit.
On the opposite side of the concave portion 11b, there is formed a convex portion 11c over which the distal end protruding portion of the second engagement protruding piece 8d of the detection target member 8 should go. Then, the first engagement protrusion 8b
A hook 8c protrudes from an outer end of the front end of the cartridge body 2, and the hook 8c faces the opening 7 of the cartridge body 2 so as to project therefrom.

In order to prevent erroneous erasure in a conventional magneto-optical disk cartridge having such a configuration, a finger is hooked on the hook 8c of the detected member 8 and the finger is held on the back wall of the cartridge body 2. The detected member 8 is slid along the opening 7 by being bent in the center direction (the direction of the arrow in FIG. 6). As a result, the detected member 8 is moved from the concave portion 11a of the engagement piece 11 to the concave portion 1e of the third engagement protrusion 8e.
1b, the tip projection of the second engagement projection 8d rides over the projection 11c and is locked. In this state, the base 8a opens the detection hole 9 of the cartridge body 2, and this detection hole The erroneous erasure is prevented by inserting an erroneous erasure prevention detection pin (not shown) on the recording / reproducing apparatus side into 9.

[0005]

However, in the conventional magneto-optical disk cartridge, the opening for operating the member to be detected is very small, and is formed on the back wall of the cartridge body closer to the center than the corner, Further, since the hook facing the opening of the detected member is formed with a small width and width, it is difficult to hook the toe, and in particular, the sliding movement of the detected member, hook the hook of the detected member with the toe, Since the finger is bent and moved, it is inconvenient to use a sharp-pointed operating tool such as a mechanical shaft of a mechanical pencil, which is difficult to operate when the nail is short or the like.

Further, since the hook of the detecting member is a very small projection, there is a problem that it is difficult to instantaneously determine the position of the hook.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a disk cartridge which has excellent operability and can easily determine whether or not recording is possible.

[0008]

In order to solve the above-mentioned problems, a disk cartridge according to the present invention is provided with a cartridge main body in which a recordable optical disk is stored and a detection hole is provided at a corner, and a detection hole is formed in the cartridge main body. And a detection member for preventing erroneous erasure provided movably along one side wall of the cartridge body between a position where the cartridge is opened and a position where the detection hole is closed. An opening is provided from the side wall portion to the other side wall portion intersecting the one side wall portion, and the detected member is exposed to the outside of the cartridge main body from the opening portion. Another disc cartridge according to the present invention comprises a cartridge body for accommodating a recordable optical disc and having a detection hole at a corner, and a position for opening the detection hole and a position for closing the detection hole in the cartridge body. An erroneous erasure prevention detected member movably provided along one side wall portion of the cartridge main body between the cartridge main body, and an opening for exposing the detected member to one side wall portion of the cartridge main body is formed. In addition, the detected member is provided with a projection projecting from the opening at a position substantially at the center of the opening.

[0009]

When recording information, the erroneous erasure prevention detected member is moved along the opening of the side wall of the cartridge body to a position where the erroneous erasure prevention detection hole is closed. In this state, if the opening is formed at the corner between the side wall of the cartridge body and the adjacent back wall, the erroneous erase prevention detected member forms a part of the corner. To prevent erroneous erasure of recorded information, insert a toe into the opening in a state parallel to the upper and lower surfaces of the cartridge body and move the finger in a direction perpendicular to the bending direction of the finger. To move it to the other end of the opening. By this movement, the erroneous erasure prevention detected member opens the erroneous erasure prevention detection hole, and the erroneous erasure prevention detection pin of the recording / reproducing apparatus is inserted into the erroneous erasure prevention detection hole, thereby preventing erroneous erasure. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

[0011] In brief, this example also describes the present invention in a thickness of 5 mm.
It is applied to the magneto-optical mini disk cartridge of
The disc cartridge 1 of the present embodiment includes a cartridge body 2
The tip of the toe extends from the end of the side wall 2a corresponding to the corner formed with the erroneous erasure prevention detection hole 9 to the end of the back wall 2b as another side wall intersecting the side wall 2a. An opening 17 which can be inserted in a direction orthogonal to the bending direction of the finger is provided, and a detection target member 18 for preventing erroneous erasure (hereinafter also referred to as a detection target in this example) 18 is provided inside the opening 17.
It is arranged so as to be movable along a. This configuration will be described in more detail below.
Erroneous erasure prevention detection hole 9, support piece 10 and engagement piece 11, and second engagement projection 18d and third engagement of detected member 18 engaged with support piece 10 and engagement piece 11 provided in Projection 18
The description of e is substantially the same as that of the conventional example, so that the description will be simplified.

That is, in the erroneous erasure prevention mechanism in the disk cartridge of the present embodiment, the opening 17 for operating the detected member 18 is, as described above, the cartridge main body 2.
Is provided on the surface from the end of the side wall 2a to the end of the back wall 2b, and the side opening 17a on the side of the side wall 2a.
Is a length that allows the detected member 18 to move between the closed position and the open position with respect to the erroneous erasure prevention detection hole 9, and the back opening 17 b on the back wall 2 b side is the main body of the detected member 18. It is formed corresponding to the width of the base portion 18a.
The support piece 10 and the engagement piece 11 described above are provided from the side opening 17a of the opening 17 to the front side.

The detection member 18 disposed in the opening 17 has a first engagement projection 18b slidable in the front-rear direction between the side wall 2a of the cartridge body 2 and the support piece 10. And the second and third engaging projections 18
d and 18e correspond to the engagement pieces 11, and the outer surface of the end of the base portion 18a of the detected member 18 is exposed to the side opening 17a side of the opening 17, and the side wall 2a and the rear end surface are formed. The base portion 18a is exposed to the back opening 17b and is positioned on the same plane as the back wall portion 2b. Thus, a part of the corner of the cartridge body 2 is formed. A concave hook portion 18f is formed on the outer surface of the base portion 18a of the detected member 18 so that the toe can be hooked in parallel with the upper and lower surfaces of the cartridge body 2.

The erroneous erasure prevention mechanism of this embodiment having the above-mentioned structure operates as follows. When recording information, the base portion 18a of the detected member 18 is arranged at a corner of the cartridge body 2, that is, at a position where the rear end surface is flush with the back wall portion 2b, and the erroneous erasure prevention detection hole 9 is closed. (See FIG. 1). In this state, the detected member 18 is the second
In a state where the projections 18 d ₁ comes into contact with the outer surface 11c of the engaging piece 11 of the cartridge body 2 of the engaging protrusion 18 d, projections 18e ₁ of the third engagement protrusion 18e is the concave portion of the engaging piece 11 11a
And the two engaging projections 18 with respect to the engaging piece 11
The cartridges d and 18e are interlocked and held with respect to the cartridge body 2.

To prevent erroneous erasure after recording,
As shown in FIG. 2, the toe is parallel to the upper and lower surfaces of the cartridge main body 2, and the base 18 a of the detected member 18 is pressed forward from the back wall 2 b of the cartridge main body 2. As a result, the detected member 18 is moved so that the first engagement projection 18b is connected to the side wall 2a of the cartridge body 2 and the support piece 1a.
0 and the second engagement projection 18d
Also slides along the outer surface 11c of the engagement piece 11, while the third
Engaging protrusion 18e is engaging held by projections 18e ₁ is engaged is disengaged from the recess 11a of the rear engaging piece 11 moves engagement in front of the recess 11b.

As a result, the base portion 18 of the detected member 18
a is indented inward from the back wall 2b side of the cartridge main body 2 while maintaining the same surface state as the side wall 2a of the cartridge main body 2, and the erroneous erasure prevention detection hole 9 is opened. Then, the erroneous erasure prevention detection pin on the recording / reproducing apparatus side can be inserted (see FIG. 3).

In order to return the cartridge main body 2 from the erroneous erasure prevention state to the recordable state, the detected member 18 is attached to the hook portion 18f formed on the outer surface of the base portion 18a with the toe on the cartridge main body 2. When the member 18 is hooked in a direction parallel to the lower surface and pressed in the direction of the back wall portion 2b, the detected member 18 is moved in the direction of the back wall portion 2b by an operation reverse to the above-described movement operation, and the base portion 18a is erroneously erased. 9 is locked and held with respect to the cartridge body 2 in a state where the cartridge 9 is closed, and is returned to a recordable state.

As described above, in this embodiment, since the opening 17 is formed from the side wall 2a of the cartridge body 2 to the back wall 2b, the toe can be easily inserted and the claw is shortened. Can be operated reliably. Therefore, erroneous erasure can be prevented by simply moving the toe in a direction perpendicular to the bending direction of the finger without using a sharp operating tool,
Further, it is possible to return from the erroneous erasure prevention state to the recordable state.

In particular, in the present embodiment, the operation of preventing erroneous erasure of the detected member can be easily performed, and
Can be easily and reliably set to the erasure prevention state. Further, according to the present embodiment, it is possible to determine whether or not recording / reproduction can be performed based on whether or not the detected member 18 is recessed in the cartridge main body 2. Therefore, not only the case of a single unit but also the box B as shown in FIG. Even when a plurality of disc cartridges 1, 2,... Are stored in a stack, it is possible to instantaneously determine whether or not recording / reproducing of each of the disc cartridges 1, 1,.

In this embodiment, the detected member 18 is used.
The toe hook 18f is formed on the base 18a of the detected member 18 for the operation of returning the erroneous erasure prevention detection hole 9 from the open position to the closed position, but instead of this, the opening 17 of the cartridge body 2 is A gap may be formed at the edge of the side opening 17a so that the toe can be inserted between the detected member 18 and the base 18a while the detected member 18 has been moved to the open position.

Next, a second embodiment of the present invention will be described with reference to FIG. 5. The same components as those in the conventional example and the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. The erroneous erasure prevention mechanism in the magneto-optical disk cartridge 21 of the present embodiment is such that the opening 27 is relatively long forward only from the vicinity of the erroneous erasure prevention detection hole 9 only in the side wall 2a of the cartridge body 2, that is, the opening of the conventional example described above. It is formed longer than the portion 7. An erroneous erasure prevention detected member (hereinafter, referred to as a detected member) 28 corresponding to the opening 27 is entirely located in the cartridge main body 2 and movably disposed along the side wall 2a. The outer surface of the first engaging projection 28 b faces outward from the opening 27. The first engaging protrusion 28b is formed on the same plane as the side surface of the base portion 28a so as to be longer than the above-described first engaging protrusion 8b of the conventional example, that is, to have a length that closes the opening 27. First engagement projection 28
A claw projection 28c protruding from the opening 27 is provided at a position substantially at the center of the opening 27 on the outer side surface of b. That is, the claw hooking projection 28c formed on the first engagement projection 28b is provided with
When the cartridge body 2 is moved to the position where the cartridge body 2 is closed, the tip of the cartridge body 2 is moved between the cartridge body 2 and the rear edge 27b of the opening 27. Are positioned so as to be inserted in parallel with the upper and lower surfaces.

As described above, according to the present embodiment, the opening 2
7 is formed long in the front-rear direction of the side wall of the cartridge body 2, so that the toe is inserted in a state parallel to the upper and lower surfaces of the cartridge body 2 and hooked on the detected member 28 as in the first embodiment. This makes it possible to prevent erroneous erasure by merely moving the toe in a direction perpendicular to the bending direction of the finger.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and can be variously modified without departing from the gist of the present invention. For example, the erroneous erasure prevention detection target member may be configured to be movable between an open position and a closed position of the erroneous erasure prevention detection hole and held in the respective positions in the provisionally locked state. Also, the shape and configuration of the cartridge body can be changed according to the storage disk. Note that the erroneous erasure prevention mechanism of the present invention is not limited to a disk cartridge but can be applied to a tape cassette.

[0024]

As described above, in the disk cartridge according to the present invention, the erroneous erasure prevention detected member can be moved by the toe directly in the direction perpendicular to the bending direction of the finger without using an operating tool, so that the erroneous erasure is prevented. The effect is achieved that the prevention operation can be performed easily and more reliably, and the disk cartridge is suitable for a disk cartridge that repeatedly performs recording and reproduction.
In particular, the present invention is very effective when applied to a small and thin so-called mini disc cartridge.

[Brief description of the drawings]

FIG. 1 is an enlarged plan view of a main part of a first embodiment of a disk cartridge according to the present invention.

FIG. 2 is a perspective view of the same disk cartridge.

FIG. 3 is an enlarged plan view of a main part of the same erroneous erasure prevention state.

FIG. 4 is a perspective view showing a state in which a plurality of disk cartridges are stacked and stored in a cartridge box.

FIG. 5 is a perspective view of a second embodiment of the disc cartridge according to the present invention.

FIG. 6 is an exploded perspective view of a conventional disk cartridge.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc cartridge 2 Cartridge main body 9 Erroneous erasure prevention detection hole 17, 27 Opening 18, 28 Detected member for erroneous erasure prevention

Claims (4)

(57) [Claims] 1. A cartridge body containing a recordable optical disk and having a detection hole in a corner portion, and a position between a position where the detection hole is opened and a position where the detection hole is closed in the cartridge body. An erroneous erasure prevention detected member movably provided along one side wall of the cartridge body, wherein the cartridge body intersects with the one side wall from the one side wall of the cartridge body. A disk cartridge, wherein an opening is provided over a side wall of the cartridge, and the detected member is exposed to the outside of the cartridge body through the opening. 2. The disk cartridge according to claim 1, wherein the detected member forms substantially the same plane as the other side wall when moved to a position that closes the detection hole. 3. The disk cartridge according to claim 1, wherein said disk cartridge further comprises holding means for holding said detected member at each of a position for opening said detection hole and a position for closing said detection hole. Disk cartridge. 4. A cartridge body accommodating a recordable optical disk and having a detection hole at a corner thereof, and a position between a position where the detection hole is opened and a position where the detection hole is closed in the cartridge body. An erroneous erasure prevention detected member movably provided along one side wall portion of the cartridge main body, and an opening for allowing the detected member to face outward on the one side wall portion of the cartridge main body. A disk cartridge which is formed and wherein the detected member is provided with a projection projecting from the opening at a position substantially at the center of the opening.