JPH09265755A - Disk cartridge - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To reinforce the periphery of an opening for inserting and removing a disc in a main body case, and to ensure the position regulation of a lid closing the opening and the disc position regulation. SOLUTION: An opening 5 for inserting and removing a disc of a main body case 1 is closed by a first double door type lid 7A and a second lid 7B.
Between the inner peripheral wall 11 of each lid 7A, 7B in the main body case 1 and the peripheral edge of the disc 2 facing this, the first ribs 22, 23 are provided on the inner surfaces of the upper and lower walls 20, 21 of the main body case 1 of the disc 2. It is installed so as to face each other at a vertical interval that allows for putting in and out. The first ribs 22 and 23 allow the upper and lower walls 2
1 is reinforced, and the movement of each lid 7A, 7B to the disc accommodating portion is restricted. A second rib 24, which intervenes between the first ribs 22 and 23, projects from the inner peripheral wall 11 of each of the lids 7A and 7B, and the second rib 24 regulates the free movement of the disc 2 toward the opening 5 direction. .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge in which a disc, which is a recording medium such as an optical disc or a magneto-optical disc, is removably housed in a main body case.

[0002]

2. Description of the Related Art As a disk cartridge of this kind,
There is one as shown in FIG. 6 (for example, Japanese Patent Laid-Open No. 5-24
2626). There, an opening 5 is provided at the rear end of the body case 1 for allowing the disc 2 to be taken in and out. Since the opening 5 has a very small difference between the lateral width of the main body case 1 and the diameter of the disk 2,
Main surface opening 5 over the entire left and right sides of the rear side of the body case 1
In addition to providing a, side surface openings 5b, 5b are also provided continuously with the main surface opening 5a at the rear end portions of the left and right side surfaces adjacent to both ends of the rear side surface. The opening 5 is opened and closed by the lid 7,
Is a main surface wall 9 that closes the main surface opening 5a, and left and right side surface openings 5b
The side wall 10 that closes 5b and the inner peripheral wall 11 that is formed in an arc shape along the circumference of the disk 2 on the inner surface side of the main surface wall 9 are formed. The lid 7 is pivotally supported by a pivot 17 having a corner where the one side wall 10 and the main wall 9 intersect as a pivotal fulcrum, and is opened around the pivot 17 over 180 degrees from the closed state.

[0003]

In the above-mentioned disc cartridge, the inner peripheral wall 11 of the lid 7 is provided with a circular arc surface 11a along the peripheral edge of the disk 2, and the circular arc surface 11a allows the disk 2 to face the opening 5. It is regulated to move to. However, since the lid 7 may rattle due to abrasion of the pivot shaft 17 or the like, the regulation of the closed position of the lid 7 must be ensured to satisfy the regulation of free movement of the disc 2 toward the opening 5. Further, if the lid 7 is forced into the body case 1 more than necessary, the disc 2 may be damaged. Furthermore, if the lid 7 is left open,
Dust may enter the opening 5 from the outside, and when the lid 7 is closed as it is, the dust is scraped into the disc housing portion in the main body case 1 and adheres to the disc 2, which causes an error when reading or writing a signal. May occur. In order to facilitate the loading and unloading of the disk 2, the opening 5 is largely opened by the main surface opening 5a and the left and right side surface openings 5b, 5b. The upper and lower walls of the rear part of the main body case 1 having such large opening 5 are There is an unavoidable decrease in rigidity, and there is a risk of damage due to accidental drop impact.

Therefore, an object of the present invention is to ensure the regulation of the rotation of the lid in the closing direction to prevent the damage of the disc and the regulation of the floating movement of the disc toward the opening. To provide. An object of the present invention is to provide a disc cartridge capable of preventing dust from entering the disc housing portion. The object of the present invention is to improve the rigidity of the upper and lower walls of the opening of the main body case, and to prevent cracking or damage even when a strong impact or large external force is received due to an accidental drop accident or collision with another object. An object is to provide a disc cartridge with excellent durability.

[0005]

DISCLOSURE OF THE INVENTION In a disk cartridge on which the present invention is based, an opening 5 for inserting and removing a disk is provided on one side surface 8 of a main body case 1 in which a disk 2 as a recording medium is rotatably accommodated. A lid 7 for opening and closing the opening 5
Is mounted so as to be horizontally rotatable around the pivot 17 on a plane parallel to the plane of the main body case 1.

Between the inner surface side of the lid 7 in the main body case 1 and the peripheral edge of the disk 2 facing this, a circle along the circumference of the disk 2 is formed on each inner surface of the upper and lower walls 20 and 21 of the main body case 1. The arc-shaped first ribs 22 and 23 are provided so as to vertically oppose each other at a vertical interval that allows the disc 2 to be taken in and out. On the inner surface side of the lid 7, the upper and lower first ribs 22.
A second rib 24 intervening between the two 23 is provided so as to project along the peripheral edge of the disk 2.

The opening 5 is one side surface 8 of the body case 1.
The main surface opening 5a is formed over the entire length of the side surface 8 and side surface openings 5b and 5b are formed at the ends of the other side walls 6 and 6 adjacent to both ends of the side surface 8 near the side surface 8. The lid 7 is
A main surface wall 9 that closes the main surface opening 5a by entering it inside
And is formed to extend at a right angle from one end of the main surface wall 9,
A side wall 10 that closes the side opening 5b by entering it.
And an inner peripheral wall 11 formed in an arc shape along the circumference of the disk 2 on the inner surface side of the main surface wall 9.
Then, between the inner peripheral wall 11 of the lid 7 in the main body case 1 and the peripheral edge of the disc 2 facing the inner peripheral wall 11, a circular arc shape along the circumference of the disc 2 is formed on each inner surface of the upper and lower walls 20 and 21 of the main body case 1. The first ribs 22 and 23 of the first rib 22 and the second rib 23 are vertically opposed to each other with a vertical interval that allows the disc 2 to be taken in and out. On the inner surface side of the inner peripheral wall 11 of the lid 7, the upper and lower first
The second rib 24, which is interposed between the ribs 22 and 23, is attached to the disc 2
Project along the periphery of the.

[0008]

The first ribs 22 and 23 reinforce the upper and lower walls 20 and 21 around the opening 5 to enhance the rigidity of the main body case 1.
When rotating the lid 7 in the closing direction, the inner peripheral wall 11 of the lid 7 is rotated.
Since the upper and lower ends are received by the first ribs 22 and 23,
The lid 7 does not move further inward than that position, and therefore does not damage the disc 2. When the lid 7 is rotated in the closing direction, if dust has entered the opening 5, the dust is scraped by the lid 7, but the scraped dust is received by the first ribs 22 and 23. It is possible to prevent dust from entering the disc storage portion.

When the disk 2 floats in the direction of the opening 5, the disk 2 comes into contact with the second rib 24, and the position of the disk 2 is regulated by this contacting action. Since the first ribs 22 and 23 reliably control the position of the first rib 22, it is accurately performed.

[0010]

1 to 4 show an embodiment of a disk cartridge according to the present invention. In FIG. 2, a disc cartridge rotatably accommodates a disc 2 such as an optical disc on which signals such as video, audio, and information are recorded on both upper and lower sides inside a thin rectangular body case 1.
The main body case 1 is formed by abutting an upper case 1a and a lower case 1b, which are made of plastic, against each other so as to be integrally connected to each other. Is opened, and this window 3 is closed by a shutter 4 that slides open and close to the left and right. At the front half of the inner surface of each of the upper case 1a and the lower case 1b, a restricting rib 18 that restricts the disc 2 from moving forward is formed in an arc shape so as to extend along the circumference of the disc 2.

2 and 4, an opening 5 for inserting and removing the disk 2 is provided at the rear end of the body case 1, and the opening 5 is a rear side surface 8 of the body case 1.
The main surface opening 5a formed over the entire left and right sides of the main body case 1 and the side surface openings 5b and 5b opened only on the rear end side of the left and right side walls 6 of the main body case 1 are opened in a U shape in a plan view. The opening 5 is opened and closed by a lid 7. The lid 7 is of a double-door type that the first lid 7A and the second lid 7B, which are made of plastic and have a symmetrical shape, are aligned at the left and right centers. First
The lid 7A and the second lid 7B respectively have a main surface wall 9 and a main surface wall 9
A side wall 10 that is formed to extend from one end in the left-right direction to the front at a right angle, an inner peripheral wall 11 that is formed in an arc shape along the circumference of the disk 2 on the inner surface side of the main surface wall 9, and the side wall 10
Of the inner peripheral wall 11 and a front end portion of the inner peripheral wall 11 and a rotation base end wall 12 that connects the main surface wall 9 substantially in parallel. The main surface wall 9 is formed so as to enter the inside of the main surface opening 5a and close it, and the side wall 10 is formed so as to enter the inside of the side surface opening 5b and close it. Each of the lids 7A and 7B has a meat-thin space 13 having a substantially triangular shape in a plan view that is opened vertically in a portion surrounded by the main surface wall 9, the inner peripheral wall 11 and the side wall 10 in order to reduce weight and save material. By providing it, it is formed in a hollow frame shape. The main surface wall 9 is provided with a recess 14 into which a fingertip can be hung when the lid is opened. On the outer side surface of the side wall 10, a U-shaped notch 16 corresponding to the positioning recess 15 provided near the rear end of the main body case 1 is provided.

As shown in FIG. 3, the first lid 7A and the second lid 7B are integrally formed by vertically projecting the pivot 17 from a corner where the side wall 10 and the pivot base wall 12 intersect or in the vicinity thereof. Then, the upper and lower ends of this pivot 17 are
.Axial hole 19 recessed in the vicinity of the rear end of each side wall 6 of 1b
• Engage rotatably in 19. The first lid 7A and the second lid 7B have a main surface opening 5a and a side surface opening 5b of the opening 5, respectively.
Main body case 1
Horizontally rotated 90 degrees on a plane parallel to the plane of the main surface opening 5a
It is possible to switch between the fully open position and the fully open position.

1 and 2, between the inner peripheral walls 11 of the first and second lids 7A and 7B in the main body case 1 and the peripheral edge of the disk 2 facing the upper and lower walls 20 of the main body case 1. First ribs 22 and 23, which are formed in an arc shape along the circumference of the disk 2, are provided on the inner surfaces of 21 so as to vertically oppose each other. The first ribs 22 and 23 reinforce the upper and lower walls 20 and 21 in the opening 5, and the outer surfaces 22a and 23a facing the opening 5 have inner walls 1 of the respective lids 7A and 7B.
By contacting the upper and lower ends of No. 1, the lids 7A and 7B are restrained from being pushed further into the case. When the first and second lids 7A and 7B are left open, dust may enter the opening 5. The dust that has entered the opening 5 is scraped by the closing operation of each of the lids 7A and 7B, but the first ribs 22 and 23 receive the scraped dust, and thus prevent the dust from entering the disc storage portion. Also exhibits a dustproof function.

The vertical distance between the upper and lower first ribs 22 and 23 is set to be smaller than the thickness dimension of the disk 2 so that the disk 2 can be taken in and out. The first ribs 22 and 23 are formed in a trapezoidal cross section, and the outer surfaces 22a and 23a and the inner surface 2 thereof are formed.
By forming 2b and 23b on the inclined surfaces respectively,
When the disk 2 is taken in and out, the disk 2 has the first rib 22.
The inner surfaces 22b and 23b or the outer surfaces 22a and 23a of 23 are slid so as to easily get over them.

On the other hand, on the inner peripheral walls 11 of the first lid 7A and the second lid 7B, the upper and lower first ribs 22.
A second rib 24 that intervenes between the three is provided so as to project along the peripheral edge of the disk 2. In this way, with the first lid 7A and the second lid 7B closed, the respective second ribs 24 are interposed between the first ribs 22 and 23 along the peripheral edge of the disc 2, so that the disc 2 is moved to the first position. Even when the ribs 22 and 23 get over and move in the direction of the opening 5, the ribs come into contact with the second rib 24, so that the ribs 22 and 23 can be prevented from further moving toward the opening 5. When a pressing load is applied from the outside to the upper wall 20 or the lower wall 21 in the opening 5 of the main body case 1, the upper wall 2
0 or the lower wall 21 is received and supported by the upper and lower end surfaces of each of the lids 7A and 7B, and the first ribs 22 and 23 are received and supported by the second ribs 24, so that the upper wall 20 or the lower wall 21 locally bends. There is no such thing, that is, each lid 7A, 7B
And the local deformation of the upper wall 20 and the lower wall 21 can be prevented by the tensioning action of the second rib 24.

As in the above embodiment, by adopting the double-door type lid 7 composed of the first lid 7A and the second lid 7B on the left and right, the turning radius can be reduced, so that the turning angle is 90 degrees.
Combined with the sufficient degree, it is advantageous that the rotation space of the lid 7 required outside the main body case 1 can be further narrowed and it can be avoided from contact with other peripheral objects. However, the present invention is not limited to this, and as shown in FIG. 5, a single lid 7 may be used to provide a single-opening specification. In this case, the single lid 7 includes the main surface wall 9 that covers the entire main surface opening 5a and the main surface wall 9
Side walls 10 and 10 which are continuously provided at both ends of the main wall 9 and close the left and right side openings 5b and 5b, and the inner peripheral wall 1 provided on the inner surface side of the main surface wall 9.
1, the front end portions of the left and right side walls 10 and 10 and the inner peripheral wall 11
The left and right side walls 10 are formed so as to have a rotating base end wall 12 and a rotating front end wall 12 'that connect the left and right front end portions of the left and right side walls.
-The meat slime space portion 1 is provided between the main surface wall 10 and the main surface wall 9, respectively.
3 is formed. In this case, the pivot shaft 1 is provided at a corner where one side wall 10 and the rotation base wall 12 intersect, or a position near this corner.
7 will be provided, and the second ribs 24 will be provided side by side on the inner peripheral wall 11. In addition to the rear side surface 8 of the main body case 1, the opening 5 includes the left and right side walls 6 and 6.
It can also be provided in either one of the above.

[0017]

According to the present invention, the first ribs 22 and 23 are provided on the inner surfaces of the upper and lower walls 20 and 21 of the main body case 1 so as to vertically oppose each other. Therefore, the upper and lower walls 20 and 21 around the opening 5 of the main body case 1 can be reinforced to enhance the rigidity of the main body case 1 and can be well prevented from being damaged by an accidental drop or collision with another object, The durability of the main body case 1 can be improved while ensuring the easy loading and unloading of the disc 1. Further, the lid 7 can be restrained from being pushed further inward by the first ribs 22 and 23, so that the disc 2 can be prevented from being damaged by being pushed too much, and dust scratched by the lid 7 can be stored in the disc. It can be prevented from entering the part.

Since the lid 7 is surely regulated to the closed position by the first ribs 22 and 23 as described above, this inner peripheral wall 11
The second rib 24 provided at the position can accurately prevent the disc 2 from moving in the direction of the opening 5 and can be always accommodated at a fixed position. Even when an external load is applied to the upper and lower walls 20 and 21 of the main body case 1, it is possible to reliably prevent the upper and lower walls 20 and 21 from being locally deformed and deformed by the urging action of the second rib 24 together with the lid 7. .

[Brief description of drawings]

FIG. 1 is an enlarged sectional view taken along the line AA in FIG.

FIG. 2 is a partially cutaway plan view of the whole.

FIG. 3 is a plan view of a main part with a lid open.

FIG. 4 is a side view of a main part.

FIG. 5 is a partially cutaway plan view of the whole of another embodiment.

FIG. 6 is a plan view schematically showing a conventional disk cartridge.

[Explanation of symbols]

 1 Main Body Case 2 Disc 5 Opening 5a Main Surface Opening 5b Side Opening 7 Lid 7A First Lid 7B Second Lid 9 Main Surface Wall 10 Side Wall 11 Inner Circumferential Wall 12 Rotation Base End Wall 20 Main Case Upper Wall 21 Main Body Case Lower wall 22/23 First rib 24 Second rib

Claims (2)

[Claims] 1. An opening 5 for loading and unloading a disc is provided on one side surface 8 of a main body case 1 in which a disc 2 is rotatably accommodated, and a lid 7 for opening and closing the opening 5 is provided in the main body case 1. In a disc cartridge mounted horizontally rotatable about a pivot 17 on a plane parallel to the plane of the case 1, between the inner surface side of the lid 7 in the main body case 1 and the peripheral edge of the disc 2 facing the lid 7. , The upper and lower walls 20 of the body case 1
The first ribs 22 and 23 in the shape of an arc along the circumference of the disk 2 are provided on the inner surfaces of 21 in a vertically opposed manner at a vertical interval that allows the disk 2 to be taken in and out, and the inner surface side of the lid 7 In the closed state, the upper and lower first ribs 22
A disc cartridge, characterized in that a second rib (24) intervening between the two (23) is provided so as to project along the peripheral edge of the disc (2). 2. A main body case 1 in which a disc 2 is rotatably accommodated is provided with an opening 5 for loading and unloading the disc. The opening 5 is opened over the entire length of one side surface 8 of the main body case 1. The main surface opening 5a and the side surface openings 5b and 5b opened at the end portions of the other side walls 6 and 6 adjacent to both ends of the side surface 8 near the side surface 8 are provided. The opening 5 is opened and closed in the main body case 1. In the disc cartridge in which the lid 7 is horizontally rotatable about the pivot 17 on a plane parallel to the plane of the main body case 1, the lid 7 covers the main surface opening 5a by closing the main surface wall 9 therein. And a side wall 10 which is formed so as to extend at a right angle from one end of the main surface wall 9 so as to enter and close the side surface opening 5b, and a circle extending along the circumference of the disk 2 on the inner surface side of the main surface wall 9. With the inner peripheral wall 11 formed in an arc shape Between the inner peripheral wall 11 of the lid 7 in the main body case 1 and the peripheral edge of the disc 2 facing the inner peripheral wall 11, the inner circumference of the disc 2 is formed on each inner surface of the upper and lower walls 20 and 21 of the main body case 1. The first ribs 22 and 23 in the shape of an arc extending along the arc are protruded vertically above and below each other at a vertical interval that allows the disc 2 to be taken in and out. 2. A disk cartridge, wherein a second rib 24 intervening between the first ribs 22 and 23 is projectingly provided along the peripheral edge of the disk 2.