JPH0514390Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a disk cartridge which is attached to a disk player to perform recording and/or playback on a disk. The present invention relates to a double-sided disk cartridge in which a disk formed with a double-sided disk is rotatably housed in a cartridge consisting of upper and lower halves.

[Prior art]

In this type of double-sided disk cartridge, a pair of erroneous erasure prevention members must be provided to prevent the information recorded on both the upper and lower recording surfaces, which are the A and B sides of the disk, from being erroneously erased. . In this case, normally, a pair of upper and lower detection holes are provided on both upper and lower surfaces of the upper and lower halves, which are sides A and B of the cartridge, and a pair of accidental erasure prevention members are provided to open and close the pair of detection holes from the inside. When installing the disk cartridge into the disk player, the disk cartridge is pulled horizontally into the disk player and then vertically lowered from above to the cartridge installation position and installed, making use of the vertical downward movement of the disk cartridge. Then, a detection pin provided vertically in the disc player is relatively inserted into the detection hole from the lower surface side of the disc cartridge. At that time, the insertion depth of the detection pin into the detection hole is varied (selected) depending on whether the detection hole is closed from the inside by the accidental erasure prevention member or opened, and Therefore, the presence or absence of prevention of erroneous erasure is detected by an electric switch.

Therefore, in a double-sided disk cartridge, the A displayed on both the top and bottom of the cartridge is
The display on the A and B sides of the disk and the surface on which the presence or absence of accidental erasure prevention on both the A and B recording surfaces of the disk corresponding to the display is to be detected are upside down.

[Problem that the invention attempts to solve]

Therefore, for example, on side B of the cartridge, which is opposite to side A, there is a display indicating whether side A of the disk is protected against accidental erasure, and on side A, which is opposite side B of the cartridge, there is a sign indicating that side B of the disk is prevented from being erased accidentally. If the presence/absence of the disk cartridge is displayed, it is likely to cause considerable confusion in the use of the disk cartridge.

Conventionally, there are some devices in which the presence or absence of accidental erasure prevention for both sides A and B of the disk is displayed on the same side of the cartridge, but in this case as well, the display of side A and B of the cartridge and the corresponding disk. The correspondence between side A and side B of erroneous erasure prevention is not clear, and this tends to cause confusion when using the disk cartridge.

This invention makes it very clear that the correspondence between the A side and B sides displayed on both the top and bottom of the cartridge and the corresponding indication of whether or not accidental erasure has been prevented on both the A and B recording sides of the disk is made very clear. This is to make it possible to do the following.

[Means for solving problems]

The present invention provides the above-mentioned double-sided disk cartridge, in which the upper half and the lower half have the following features:
A display window formed with an inner lid of the same color and integral with these upper and lower halves, and a detection hole for detecting the prevention of mistaken erasure corresponding to each display window are respectively provided, and the above-mentioned pair of mistaken erasure prevention members are provided. An operating section disposed within the display window provided in one half of the upper and lower halves and a detection section capable of closing the detection hole provided in the other half are formed respectively to prevent the above-mentioned erroneous erasure. The member has a first position in which the operating portion closes the inner lid from the outside, and a second position in which the operating portion moves from the first position and causes the inner lid to face outward from the display window. The detecting section is movably supported within the cartridge so as to be able to take a position, and the detecting section closes the detecting hole when the operating section is located at one of the first or second positions; configured to open the detection hole when the operating section is located at the other of the first or second position;
At least the part of the operation that closes the inner lid is configured in a different color from the upper and lower halves,
A disk cartridge configured to display different colors in the display window depending on whether the operation section is located at one of the first or second positions and when it is located at the other position.

[Effect]

In this invention, the display of side A and side B displayed on both the upper and lower sides of the cartridge, and the side on which it is intended to detect the presence or absence of accidental erasure prevention for both recording sides of the disk corresponding to the display, are located above and below. Even though it is a double-sided disk cartridge with opposite sides, the display of whether or not accidental erasure prevention is enabled on sides A and B of the disk can be operated within the display window of the same side A and B of the cartridge. It can be displayed depending on the position of the cartridge, so it can be displayed on the A side and B side of the cartridge.
The correspondence between this display and the display indicating whether or not accidental erasing is prevented on both recording surfaces A and B of the disk becomes extremely clear.

〔Example〕

An embodiment of the disk cartridge of the present invention will be described below with reference to the drawings. In this embodiment, a disk called a draw disk (DREW-DISC) that can be written (recorded) and read (reproduced) by an optical method or a magneto-optical method is used.

First, as shown in FIG. 1, a disk cartridge 1 has upper and lower halves 2, which are molded from synthetic resin or the like.
A disk 5 is rotatably housed horizontally in a cartridge 4 consisting of three halves, and the upper and lower halves 2 and 3 are fitted from above and below and fixed with screws or the like. And this disk cartridge 1
The disc cartridge is constructed as a so-called A and B double-sided disc cartridge in which recording surfaces are formed on both the upper and lower surfaces, that is, the A and B sides of the disc 5. The upper and lower halves 2 and 3 have a pair of upper and lower circular center holes 7 corresponding to the center hole 6 of the disk 5, and a pair of upper and lower approximately rectangular head insertion openings 8 connected to the center holes 7.
and both openings 8 are provided with a cartridge 4.
A shutter 9 with a roughly U-shaped cross section made of a stainless steel plate etc. is attached so as to be slidable in the directions of arrows a and b.
It is configured to be opened and closed by.

Next, as shown in FIGS. 1 and 2, a pair of left and right erroneous erasure prevention members 1 are provided to prevent erroneous erasure of information recorded on both recording surfaces A and B of the disk 5.
1 and 12 are provided inside the cartridge 4 on the rear end wall 4a side so as to be movable in the directions of arrows c and d, respectively. At this time, both the erroneous erasure prevention members 11 and 12 are the same parts molded from synthetic resin or the like, and are colored in a different color (for example, red) from the upper and lower halves 2 and 3. Both of the mistaken erasure prevention members 11 and 12, which are the same component, are vertically symmetrically arranged at positions distributed left and right with respect to the center line P1 of the cartridge 1 in the left-right direction. Also, upper and lower half 2,
3 includes a pair of rectangular upper and lower display windows 13 and 14 corresponding to both the mistaken erasure prevention members 11 and 12, and a pair of circular upper and lower detection holes arranged vertically opposite to these pair of display windows 13 and 14. 15 and 16 are provided. Note that the distances 11 and 12 between the display windows 13 and 14 and the detection holes 15 and 16 with respect to the center line P1 in the left-right direction of the cartridge 4 are set to be equal.

Next, details of one of the accidental erasure prevention members 11 and its mounting structure will be explained with reference to FIGS. 3 to 5B, except that the other accidental erasure prevention member 12 and its mounting structure are also vertically symmetrical. It's exactly the same.

As mentioned above, this accidental erasure prevention member 11 is molded from synthetic resin or the like in a red color or the like, and the side surface shape is approximately L on one side of the upper end of the main body 18.
A shaped operation section 19 is integrally provided, and the main body 18
A detection section 20 having a substantially inverted L-shaped side surface is integrally provided on the other side of the lower end. Also, the main body 18
A pair of left and right elastic click pieces 21 having a rectangular planar shape are integrally provided on both sides. The erroneous erasure prevention member 11 includes a guide wall 22 that is integrally provided with the rear end wall 4a of the cartridge 4 and the inner surface of the lower half 3 parallel to the rear end wall 4a.
It is stored in a storage space 23 surrounded from above and below by the upper and lower halves 2 and 3. The operation section 19 of this accidental erasure prevention member 11 is inserted into the display window 13 provided in the upper half 2, and the detection section 20 is inserted into the detection hole 15 provided in the lower half 3 on the inside (upper side). The erroneous erasure prevention member 11 can be slid along the rear end wall 4a in the directions of arrows c and d by operating the operating section 19 in the display window 13. has been done. Both click pieces 21 are always elastically pressed against the rear end wall 4a and the guide wall 22, and the accidental erasure prevention member 1 is attached to both pressing surfaces 24.
A pair of positioning recesses 25 and 26 are provided for positioning 1 with a click feeling. Further, an inner lid 27 is integrally provided inside the display window 13 of the upper half 2.

Disk cartridge 1 configured as above
According to the above, as shown in FIGS. 4A and 5A, the operation section 19 of the accidental erasure prevention member 11 is pressed in the display window 13 of the A side 2a (the upper surface of the upper half 2) of the cartridge 4.
When the cartridge 4 is slid in the direction of arrow c to the recordable position P2, the detection hole 15 on the B side 3a (lower surface of the lower half 3) of the cartridge 4 is closed by the detection section 20 from the inside. At this time, the entire inside of the display window 13 becomes red, which is the color of the erroneous erasure prevention member 11.
At this time, both click pieces 21 are fitted into one of the positioning recesses 25 with a click feeling, and the erroneous erasure prevention member 11 is positioned at its recordable position P2.

In this state, when the disk cartridge 1 is vertically lowered from above and installed at the cartridge installation position in the disk player, the disk cartridge 1 is vertically installed in the disk player as shown by the one-dot chain line in FIG. 4A. The detection pin 28 is relatively inserted into the detection hole 15 from the lower surface side (B surface 3a side) of the disk cartridge 1;
5 is closed by the detection part 20, the upper end of the detection pin 28 comes into contact with the detection part 20 of the accidental erasure prevention member 11, and the insertion depth of the detection pin 28 into the detection hole 15 at that time is reduced. The distance l3 becomes smaller. Since the small insertion depth l3 is detected by an electric switch (not shown), at this time,
Information can be recorded on the A side of the disk 5 (for example, the bottom surface of the disk).

Next, according to this disk cartridge 1,
As shown in FIGS. 4B and 5B, the accidental erasure prevention member 1 is placed inside the display window 13 on the A side 2a of the cartridge 4.
When the operating section 19 of 1 is slid in the direction of the arrow d to the unrecordable position P3, the detection section 20 is deflected in the direction of the arrow d from the detection hole 15 on the B side 3a of the cartridge 4, and the detection hole 15 is opened. Ru. Note that at this time, the red color appearing in the display window 13 is the operating part 19.
It is only a small part of the upper end surface. Also, at this time, both click pieces 21 are connected to the other positioning recess 2.
5 with a click, and the erroneous erasure prevention member 11 is positioned at the unrecordable position P3.

In this state, when the disk cartridge 1 is vertically lowered from above and installed at the cartridge installation position in the disk player, the detection pin 28 in the disk player is connected to the disk cartridge as shown by the dashed line in FIG. 4B. Although the detection pin 28 is relatively inserted into the detection hole 15 from below, since the detection hole 15 is open at this time, the insertion depth l4 of the detection pin 28 into the detection hole 15 becomes large. Since the large insertion depth l4 is detected by an electric switch (not shown), at this time it becomes impossible to record information on side A of the disk 5 (so-called accidental erasure prevention state).

Therefore, according to this disk cartridge 1, the display of whether or not the A side of the disk 5 (for example, the lower surface of the disk) is prevented from being erased accidentally is displayed on the A side of the cartridge 4.
This can be clearly displayed depending on whether or not the operation unit 19 is located at the unrecordable position P3 within the display window 13 of the surface 2a (upper surface of the upper half 2). Similarly, the display of whether the B side (for example, the top surface) of the disk 5 is protected against accidental erasure is displayed on the B side 3a of the cartridge 4.
(on the bottom surface of the lower half 3)
9 is located at the unrecordable position P3.

Although one embodiment of the present invention has been described above, various effective modifications can be made based on the technical idea of the present invention.

For example, in the embodiment, a pair of accidental erasure prevention members 1
1 and 12 are configured to slide linearly in the directions of arrows c and d, however, the pair of accidental erasure prevention members 11 and 12 may be moved in an arc shape.

Further, the shape and structure of the pair of accidental erasure prevention members 11 and 12 are not limited to the shape and structure shown in the embodiments.

Furthermore, the present invention is not limited to disk cartridges that house draw disks, but can be applied to disk cartridges that house various types of recording and/or playback disks.

[Effect of idea]

The present invention displays the presence/absence of accidental erasure prevention on sides A and B of the disk in different colors depending on the position of the operating section within the same display window for sides A and B of the cartridge. Cartridge side A, B
Since we have made the correspondence between the indication of the side and the indication of whether or not accidental erasure is prevented for both the A and B recording sides of the disk that corresponds to that indication, there will be no confusion when using the disk cartridge. It is possible to provide a disk cartridge that is completely free and very easy to use, and it is possible to prevent the information recorded on the disk from being accidentally erased.

[Brief explanation of the drawing]

The drawings show one embodiment of a disk cartridge to which the present invention is applied, in which Fig. 1 is a perspective view, Fig. 2 is a view taken along the line from Fig. 1, and Fig. 3 is an exploded view of the main parts. A perspective view, FIGS. 4A and 4B are cross-sectional views showing the operation status of the accidental erasure prevention member, and FIGS. 5A and 5B are views taken along line A-A in FIG. 4A and line B-B in FIG. 4B. It is. In addition, in the symbols used in the drawings, 1...disk cartridge, 2...upper half, 2a...
A side, 3...lower half, 3a...B side, 4...cartridge, 5...disk, 11...miserasure prevention member, 12...miserasure prevention member, 13...display window, 14... Display window, 15...Detection hole, 16...
Detection hole, 19... operation section, 20... detection section.

Claims (1)

[Scope of Claim for Utility Model Registration] A disk having recording surfaces formed on both upper and lower surfaces is rotatably housed in a cartridge consisting of an upper half and a lower half, and information recorded on both the upper and lower recording surfaces of the disk. In a disk cartridge, in which a pair of accidental erasure prevention members are movably provided within the cartridge to prevent accidental erasure of each of the above, the upper half and the lower half are provided with a material that is integral with the upper and lower halves and of the same color. A display window having an inner cover formed thereon and a detection hole for detecting the prevention of accidental erasure corresponding to each display window are respectively provided, and the pair of accident prevention members are provided with one half of the upper and lower halves. The erroneous erasure prevention member includes an operating section disposed in the display window provided in the display window and a detection section capable of closing a detection hole provided in the other half. The cartridge is arranged so that it can take a first position in which the inner lid is closed from the outside and a second position in which the operating section moves from the first position to expose the inner lid to the outside through the display window. The detecting section closes the detection hole when the operating section is located at one of the first or second positions, and the detecting section closes the detection hole when the operating section is located at one of the first or second positions. When located in the other position, the detection hole is opened, and at least a portion of the operation section that closes the inner lid is configured in a color different from the upper and lower halves, and the operation section is configured to open the detection hole. When the part is located in one of the first or second positions, and when it is located in the other,
A disk cartridge configured to display different colors within the display window.