JPS6233381A - Cassette for information storing medium - Google Patents

Abstract

PURPOSE:To prevent dust from invading from an opening part of a case of a cassette by forming a protrusion for blocking a space between a peripheral edge part of the opening part and an opening and closing member on a surface of the case of the cassette. CONSTITUTION:In a cassette main body A, there is a window 4 for alignment and attachment of a disk 1, and a window 5 for recording and reproducing on a disk 1 by an optical pick up and is disposed a slide cover 6 as an opening and closing member for protecting the disk 1 in the cassette main body A from flows, stains, dust or the like. On the surfaces of the cases 2, 3 constituting the cassette main body A, a protrusion 7 is formed, and a space between periph eral edge parts of the windows 4, 5 and the slide cover 6 is blocked by this protrusion 7. Thereby, the dust does not enter from the space and a recording surface of the disk 1 has no flows.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides, for example, a disc-shaped information storage medium, etc.
Information to protect the media and facilitate its handling 11! Related to media cassettes.

[Technical background of the invention and its problems]

In general, an information storage medium cassette has an opening into which a pickup for information recording and reproduction is inserted into the case, and an opening into which a motor for rotating the information storage medium and a mounting part for attaching to the motor are inserted. However, these openings are closed by a sliding lid during non-recording/reproduction, and are opened during recording/reproduction.

However, in the past, a gap was formed between the surface of the case and the sliding lid, and dust etc. entered the case from the opening through this gap, causing damage to the storage surface of the information storage medium. It had the disadvantage of getting dirty.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and is caused by dust entering through the opening of the cassette case.
To provide a cassette for an information storage medium that does not damage the recording surface of the information storage medium.

[Summary of the invention]

To achieve the above object, the present invention prevents dust from entering through the gap by forming a protrusion on the surface of the cassette case that closes the gap between the peripheral edge of the opening and the opening/closing body. This is how it was done.

(Embodiment of the Invention) The present invention will be described below with reference to an embodiment shown in the drawings.

FIG. 1 shows the external appearance of an information storage medium cassette that accommodates a disk as an information storage medium, in which solid line arrows indicate the insertion direction of the cassette into an information processing device, and dashed line arrows in the figure indicate the removal direction. show. Further, in the figure, 1 is a disk, and A is a cassette body that accommodates this disk 1. The disk 1 has an outer diameter of 130 inches, for example.
, an inner diameter of about 15 mm, a thickness of 1.2 to 3 tp, m, and has an information forming layer on at least one side that can be recorded or reproduced by a laser beam or the like. The cassette body A has a window 4 for centering and mounting the disc 1, and a window 5 for recording or playing back on the disc 1 using an optical pickup.

It has a slide lid 6 as an opening/closing body for protection from dirt, dust, etc. Further, a protrusion 7 is formed on the surface of the encroaching case 2.3 constituting the cassette main body A, and the protrusion 7 reduces the gap between the peripheral edge of the window 4.5 and the slide M6. It is becoming blocked. Furthermore, the protruding portion 7 has guide portions 7a, 7a along the sliding direction of the slide lid 6, and the slide M6 is guided by these guide portions 7a, 7a. Further, the cassette main body A is provided with a guide groove 8 for regulating the free end of the slide lid 6, and the rear part of the cassette main body A in the insertion direction is provided to make it easy to grasp the cassette when inserting and removing the cassette. A handle portion 9 is provided with a protrusion for holding the cassette body A, and a positioning pin hole 10.11 is provided for keeping the position of the cassette constant when the cassette main body A is inserted. Further, a disk 1 is provided at the rear of the cassette main body A in the insertion direction.
A label 12 for displaying the information content and the direction of the surface of the disc 1 is pasted in one piece over both the front and back sides of the cassette, avoiding the bin holes 10 and 11 of the cassette handle 91 and positioning bin. ing. Furthermore, a recess 13 is provided at the front of the cassette main body A in the insertion direction to make it easier to push out the slide lid 6 when inserting the cassette.

FIG. 2 shows a state in which the sliding lid 6 is moved and the window 4.5 is opened, which is the state in which the cassette is inserted into the recording/playback device. In addition, the cassette main body A has a fourth
As shown in Figures 2 and 5, it consists of case 2 and case 3. With windows 4 and 5 in Figure 2 open, case 3 and disc 1 are removed to reveal the inside of the cassette. The state is shown in Figure 3.

On the other hand, the disk 1 is arranged in the cassette in the radial direction of the case 2. The case 3 is regulated by a circular rib 14 provided on the case 3, and the case 2. Around the circular window 4 inside the case 3, and
Gap members 15.1 as elastic members made of soft materials such as chemical fibers are provided along the inner periphery of the circular ribs 14.
It is regulated by gluing 6. Further, each of the gap members 15 and 16 is adapted to come into contact with a portion of the outer circumference and an inner circumference of the disk 1 where information is not recorded,
This protects the information recording surface and prevents wear between the disc 1 and the case 2.3. However, the circular ribs 14 and the gap members 15 and 16 are set so as not to contact the disc 1 during recording and reproduction of the disc 1.

Next, the slide lid 6 will be explained with reference to FIG. 3. The slide lid 6 is slidably fitted into the guide grooves 17 and 18 in the cases 2 and 3 and can move freely.
! Smooth plastic sliding parts with low coefficient of friction 1
9 and can move freely along the cassette insertion direction. In addition, the guide groove 17
．． 18 includes a coil spring 20 as a biasing member for always holding one sliding component in the center of the cassette when no load is applied, and a coil spring 20 for smoothly expanding and contracting the coil spring 20. A guide rod 21 passes through it. Furthermore, washers 23 having an outer diameter larger than the outer diameter of the coil spring 20 and smaller than the width of the groove 22 of the sliding component 19 are attached to both ends of the coil spring 20, and the washer 23 is not pressed. As a result, the coil spring 20 becomes a mouth that expands and contracts. Further, the guide groove 17 of the case 2 is provided with a pawl 24 for regulating the length of the coil spring 20 when it is extended, and when no load is applied, the coil spring 20 is extended with both pawls 24 on both sides. It hits the claw 24. Roughly, 1i with one sliding part
122 has a narrow center with a step 25, and when the washer 23 is caught on this step 25, the sliding part 19, that is, the slide lid 6, is pushed by the coil springs 20 from both sides when no load is applied. It is held in the center of the cartridge. However, since the width of the central portion of the groove 22 of the sliding component 19 is wider than the width of the claw 24, the sliding component 19 can move without hitting the claw 24. Therefore, if a load is applied to one component, that is, the slide lid 6, it is possible to move in that direction, and in this case, the coil spring 20 on the opposite side to the direction in which the slide lid 6 moves, as shown in FIG. As shown in the figure, it extends until it hits the claw 24 and then stops.

As mentioned above, since the protrusion 7 is provided on the surface of the case 2.3, the gap between the peripheral edge of the window 4.5 and the slide M6 is closed, and dust etc. do not enter through the gap. , the recording surface of the disc 1 will not be damaged.

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Further, since the protruding portion 7 has the guide portions 7a, 7a, the sliding operation of the sliding lid 6 becomes smooth.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and various modifications can be made within the scope of the gist thereof.

〔Effect of the invention〕

As explained above, the present invention forms a protrusion on the surface of the cassette case and closes the gap between the periphery of the opening and the opening/closing body, thereby preventing dust from entering through the gap. , information record t! This has the effect that there is no risk of damaging the recording surface of the medium.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1(a) is a plan view showing a cassette for information storage medium, FIG. 1(b) is a front view thereof, and FIG. 2(a) is a cassette for information storage medium. Plan view showing the state where the slide lid of the media cassette is opened, FIG. 2(b)
is a front view thereof, FIG. 3 is a perspective view showing the slide lid guide 1lll, FIG. 4 is a perspective view showing the upper case of the information storage tR medium cassette, and FIG. 5 is a perspective view showing the lower case. 6 are perspective views showing the sliding member. A...Cassette 1~Body, 2.3...Case, 4.5
... Window (opening), 6... Opening/closing body, 7... Projection, 7a. 7a...Guide part. Applicant's agent Patent attorney Takehiko Suzue (a) (b) 1st
Figure 3 Figure 4 sWA

Claims (2)

[Claims] (1) An information storage medium cassette that houses an information storage medium inside the case, which has an opening into which a pickup for recording and reproducing information is inserted and an opening into which a drive means for rotating the information storage medium is inserted. and a slidable opening/closing body for opening and closing the opening, the gap being formed on the surface of the case between the opening/closing body and the peripheral edge of the opening. A cassette for an information storage medium, comprising a protrusion that closes the cassette. (2) The cassette for storing an information storage medium according to claim 1, wherein the protrusion has a guide portion that guides the slide of the opening/closing body.