JPH0341317Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to an accidental erasure prevention device, in particular, an opening is formed in a casing containing an erasable recording medium, and an opening is formed in a casing that can be opened and closed by accident. The present invention relates to an erroneous erasure prevention device in which an erasure prevention member is attached and the position of the erroneous erasure prevention member prevents erroneous erasure of signals recorded on a recording medium.

〓Summary of the invention〓 The present invention constitutes an accidental erasure prevention member from a plurality of parts colored in different colors, and connects them by engaging an engaging part and an engaged part. It is designed to be assembled, and the erroneous erasure prevention member colored in a plurality of colors is formed without multicolor molding.

<Prior Art> In order to prevent the contents recorded on a magnetic recording medium from being accidentally erased, tape cassettes and the like have conventionally been provided with an erroneous erasure prevention device. For example, Japanese Utility Model Application Publication No. 58-87191 discloses a tape cassette in which an opening is formed in the casing and an erroneous erasure prevention member is attached to cover the opening so that it can be opened and closed. Further, by coloring the erroneous erasure prevention member in a different color from the casing, it can be easily identified. Alternatively, by coloring this accidental erasure prevention member in two colors, the color detected from the detection hole will differ depending on the sliding position, thereby making it possible to further improve identification. Become.

〓Problem to be solved by the invention〓 When the accidental erasure prevention member is colored in two or more colors, thereby changing the color of the part visible from the outside depending on the sliding position, it is possible to prevent accidental erasure. It is necessary to color the prevention member in two or more different colors along its sliding direction. When such an erroneous erasure prevention member is molded from a synthetic resin molded body, a multicolor molding method has conventionally been used. However, using the multi-color molding method has the disadvantage that the mold is complicated and a special molding machine is required, which makes the production equipment expensive and increases the cost of the parts. .

The present invention has been developed in view of these problems, and provides an accidental erasure prevention device that does not require the use of a multicolor molding method and has an accidental erasure prevention member made up of a plurality of parts colored in different colors. The purpose is to provide

〓Means for solving the problem〓 The present invention forms an opening in a casing containing an erasable recording medium, and attaches an accidental erasure prevention member to the opening so that it can be opened and closed. In the device, the erroneous erasure prevention member is constructed from a plurality of members colored in different colors, and these members are connected to each other. The connection is made by engaging the mating part and the engaged part.

〓Operation〓 Therefore, according to the present invention, it is possible to assemble a member for preventing accidental erasure by joining a plurality of parts colored in different colors, and it is possible to assemble a member for preventing accidental erasure without using a multi-color molding method. It becomes possible to mold.

〓Example〓 The present invention will be described below with reference to an illustrated example.
FIG. 2 shows a magneto-optical disk device incorporating an accidental erasure prevention device according to an embodiment of the present invention, in which a magneto-optical disk 10 constitutes a circular recording medium, with a A center core 11 is attached. The magneto-optical disk 10 is rotationally driven within the casing 12 by the center core 11 . The casing 12 is assembled by joining the upper and lower halves 13 and 14, and has a flat rectangular parallelepiped shape. Each of these halves 13 and 14 has an approximately oval opening 1.
5 and 16 are formed, and these openings 1
The center core 11 is formed by the center side portions of 5 and 16.
are received, and writing to or reading from the optical disk 10 is performed through these openings 15 and 16.

Next, the upper and lower halves 13,1 of the casing 12
Erroneous erasure prevention device 17 provided in each of 4.
To explain this, a rectangular opening 18 and a circular detection hole 19 are provided in the upper and lower halves 13 and 14, respectively, and guide walls are provided on both sides of these openings 18 and detection hole 19, respectively. A section 20 is provided (see FIG. 10).
Then, while being guided by the guide walls 20 on both sides,
An erroneous erasure prevention member consisting of a slider 21 and a detector 22 is slidably attached.

The slider 21 is made of a synthetic resin molded body, is colored red, and has a trapezoidal groove 23 at its front end, as shown in FIGS. 3 to 5. A trapezoidal protrusion 24 of the detector 22 shown in FIGS. 6 to 8 is engaged with this groove 23 as shown in FIG. 9. The detector 22 including the protrusions 24 is also made of a synthetic resin molded body and is colored black.

Elastic pieces 25 are formed on both sides of the slider 21, and a rib 26 is formed on the tip side of the slider 21 so as to protrude laterally. It is adapted to be selectively engaged with one of the pair of recesses 27 formed therein. On the other hand, the detector 22 is provided with an operating portion 28 so as to protrude upward or downward, and furthermore, an engaging protrusion 29 is connected to the tip side of the operating portion 28 so as to protrude forward. has been done.

The relationship between the slider 21 and the detector 22, which are connected to each other by a trapezoidal groove 23 and a trapezoidal protrusion 24 and constitute an erroneous erasure prevention member, is shown in FIGS. 11 to 16.
It is possible to change the configuration shown in the figure. That is, the 14th
The operating portion 28 and the engaging protrusion 29 may be provided on the slider 21 without providing the operating portion 28 and the engaging protrusion 29 on the detector 22 shown in FIGS. Also in this modification, the slider 21 and the detector 22 are colored red and black, respectively.

In the above configuration, FIGS. 9 and 1
As shown in FIG. A sliding accidental erasure prevention member is assembled. This accidental erasure prevention member is mounted so that the operating section 28 provided on the detector 22 faces the rectangular opening 18 of the casing 12, as shown in FIG. 1, and as shown in FIG. It is attached so as to slide between a pair of guide walls 20 on both sides shown in FIG.

The ribs 26 provided on the elastic piece 25 form a pair of recesses 2 formed in the guide walls 20 on both sides.
7, whereby the accidental erasure prevention member slides between a position where the magneto-optical disk 10 is erasable and a position where it is not erasable. I come to do it. Therefore, for example, when the rectangular opening 18 is moved to a position where it is opened and the detector 22 is moved to a position facing the circular detection hole 19, erroneous erasure of the optical disk 10 will be prevented. This makes it possible to protect the contents recorded on the magneto-optical disk 10.

According to such an erroneous erasure prevention device, it becomes possible to slide the erroneous erasure prevention member particularly by the operation section 28 provided on the detector 22 or the slider 21, and this operation section 28
The halves 13, 14 and the accidental erasure prevention member are connected by engaging the engagement protrusion 29 provided at the edge of the opening 18 as shown in FIG. becomes possible. Therefore, when the upper and lower shells 13 and 14 are joined to each other, the accidental erasure prevention member attached to the upper shell 13 in particular will not fall off. It is no longer necessary to carry out the assembly quietly, thereby making it possible to greatly improve the workability of assembling the casing 12.

Further, in the erroneous erasure prevention member constituting this erroneous erasure prevention device, the slider 21 and the detector 22, which are colored differently from each other, are connected by fitting their grooves 23 and protrusions 24. Therefore, the erroneous erasure prevention member is composed of two colored portions, and the color of the portion visible through the rectangular opening 18 changes to red or black depending on its position. Therefore, with such a structure, it becomes possible to easily identify the position of the erroneous erasure prevention member from the outside. Furthermore, since the two colored portions 21 and 22 are molded separately from each other, there is no need to perform multicolor molding, and therefore no special mold or molding machine is required. Alternatively, it is no longer necessary to form a plurality of colored parts on a single molded body, and the number of steps for molding or post-molding processing can be reduced, making it possible to provide cost-effective prevention of erroneous erasure.

〓Effects of the invention〓 As described above, the present invention constitutes an accidental erasure prevention member from a plurality of parts colored in different colors,
These are connected by engaging the engaging portion and the engaged portion. Therefore, with such a configuration, there is no need to mold the erroneous erasure prevention member using a multi-color molding method, and the erroneous erasure prevention member can be molded without the need for a complicated mold or special molding machine. It is possible to do so. In addition, since the plurality of parts colored in different colors are connected by the engagement between the engaging part and the engaged part, it is possible to create an accidental erasure prevention device that is extremely cost-effective. It becomes possible to provide.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of essential parts showing the structure of an accidental erasure prevention device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of a magneto-optical disk device into which this accidental erasure prevention device is incorporated, and FIG. 3 is a plan view of the slider, FIG. 4 is a sectional view taken along the line - in FIG. 3, FIG. 5 is a front view of the slider, FIG. 6 is a plan view of the detector, and FIG. - Line sectional view, Figure 8 is a front view of the detector, Figure 9 is a longitudinal sectional view of the accidental erasure prevention device, Figure 10 is a plan view showing the assembled state of the accidental erasure prevention device, and Figure 11 is a modification. 12 is a sectional view taken along line XII-XII in FIG. 11, and FIG.
Fig. 3 is a front view of the slider, Fig. 14 is a plan view of a modified detector, and Fig. 15 is the ~ in Fig. 14.
The line sectional view and FIG. 16 are front views of the detector. In addition, in the symbols used in the drawings, 10... magneto-optical disk, 12... casing, 17... accidental erasure prevention device, 18... trapezoidal opening, 19... circular detection hole, 21... slider ( 22...detector (black), 23...trapezoidal groove, 24...trapezoidal protrusion.

Claims (1)

[Scope of utility model registration request] An opening is formed in a casing housing an erasable recording medium, and an accidental erasure prevention member is attached to the opening so that it can be opened and closed, and the signal recorded on the recording medium is determined by the position of the accidental erasure prevention member. In the device for preventing erroneous erasing, the erroneous erasing prevention member is composed of a plurality of members colored in different colors, and these members are engaged with the engaging part and the engaged part. An erroneous erasure prevention device characterized by being twisted and combined.