JPH09293355A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To identify whether a disk can be recorded, and whether a cover is open. SOLUTION: An opening section 5 for taking in and out a disk 2 in a main body case 1 is closed by a cover 7. A first detecting hole for identifying whether the cover is open, a second detecting hole 29 for identifying whether recording can be made and an operating port are the main body case 1 so as to be faced to the cover 7. A wall-thickness removed space section 13 is formed to the cover 7, and a locking button 20 is fitted into the wall-thickness removed space section 13 in a bendable and extractable manner while a recording preventive member 21 is pivoted and connected in a freely horizontally movable manner around a pivotal shaft 40. The cover 7 is closed by engaging the locking button 20 with the first detecting hole. When the disk 2 is exchanged, the locking button 20 is pushed in from the first detecting hole and bent and extracted. The operating section 37 of the recording preventive member 21 is faced to the operating port with the cover 7 closed, the second detecting hole 29 can be opened and closed by rotating and operating the recording preventing member 21 by the operating section 37, and data can be recorded with the hole closed, and cannot be recorded with it open.

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 A disk cartridge of this type is disclosed in Japanese Patent Laid-Open No. 5-242626. There, an opening is provided at the rear end of the main body case to allow the disk to be taken in and out for replacement, and the opening is closed with a lid.
The lid is horizontally rotatable about a pivot on a plane parallel to the plane of the body case. An elastic arm is provided at the pivoting tip of the lid, and the locking claw at the tip of this elastic arm is engaged with the locking hole on the main body case side to maintain the closed state of the opening, and to press a pressing tool such as a pin. The lid can be opened and operated by inserting it into the locking hole and releasing the engaged state of the locking claw.

Further, a recording prevention member and a detection hole (engagement hole) are provided in the lid in order to determine whether or not recording on the disk is possible. A fitting recess is provided on the edge of the main body case on the opening side, and the recording preventing member and the detection hole are exposed to the fitting recess. Since the recording prevention member is not provided on the main body case side but is provided on the lid, it is not necessary to secure an installation space for the recording prevention member on the main body case side, so that the recording prevention member can be made compact and the recording prevention member is slidably supported. Since there is no need to provide a guide member or the like for making the inside of the main body case a smooth surface, there is an advantage that the disk can be taken in and out from the main body case without damaging it.

[0004]

However, in the above-described lid opening structure in which the elastic arm of the lid is pressed and deformed to disengage the locking claw at the tip thereof from the locking hole, when the disk drive is loaded on the hard side, the main body is closed. There is a problem that it is difficult to determine whether the disc in the case has been exchanged with another disc. Further, in the above-mentioned disc cartridge in which not only the recording prevention member but also the detection hole is provided in the lid, the lid is apt to rattle by repeating opening and closing, and thus the positional accuracy of the detection hole is likely to be deviated. Further, the fitting concave portion of the main body case needs to be formed relatively large in order to expose the recording prevention member and the detection hole to the outside, which causes a decrease in strength of the main body case.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk cartridge provided with a lid closing lock means for easily detecting on the hardware side whether or not the disk in the main body case has been replaced. An object of the present invention is to provide a disc cartridge including a recording prevention member on the lid as described above,
An object of the present invention is to provide a disk cartridge that can secure the position accuracy of the detection holes and the strength of the main body case. It is an object of the present invention to provide a disc cartridge that can be easily opened / closed by reducing the weight of the lid. An object of the present invention is to provide a disc cartridge that can simplify the assembly of the recording prevention member and the lock button on the lid.

[0006]

In the disk cartridge of the present invention, an opening 5 for loading / unloading 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 that opens and closes the opening 5 is mounted on a plane parallel to the plane of the main body case 1 so as to be horizontally rotatable around a pivot 17. A lock button 20 for holding the lid 7 in a closed state and a recording prevention member 21 are attached to the lid 7. The main body case 1 has a first detection hole 27 for discriminating a lid opening / closing state, and a second detection hole 29 for discriminating whether recording is possible, which is opened / closed by a recording prevention member 21 at a position slightly apart from the vertical direction of the first detection hole 27. And.

The opening 5 is one side surface 8 of the body case 1.
And a main surface opening 5a that is opened over the entire length of the one side surface 8, and side surface openings 5b and 5b that are opened at the ends of the other side walls 6 and 6 that are adjacent to both ends of the one side surface 8 near the one side surface 8. On the other hand, the lid 7 is formed to extend at a right angle from one end of the main surface wall 9 that closes the main surface opening 5a by closing the main surface opening 5a therein, and closes the side surface opening 5b by entering the inside thereof. It has a side wall 10 and an inner peripheral wall 11 formed in an arc shape along the circumference of the disc 2 on the inner surface side of the main surface wall 9, and the extension side end of the side wall 10 and one end of the inner peripheral wall 11 are provided. Connect with the department. Space between the main surface wall 9 and the inner peripheral wall 11
3 is provided in a vertically penetrating manner. In the lightening space 13, the first detection hole 27 is provided between the principal surface wall 9 and the inner peripheral wall 11, between the principal surface wall 9 and the side wall 10, or between the side wall 10 and the inner peripheral wall 11. And the second detection hole 29 are located between the first detection hole 27 and the second detection hole 29 to partition the first detection hole 27 and the second detection hole 29.
2 is provided.

The first detection hole 27 and the second detection hole 29 are provided in the upper wall 25 or the lower wall 26 of the main body case 1 so as to face the lightening space 13 in the closed state of the lid 7. The lock button 20 for opening and closing the first detection hole 27 is provided with the lid 7
In addition, it is provided inside this using the lightening space portion 13. Specifically, the main surface wall 9, the inner peripheral wall 11, and the side wall 1 of the lid 7
0 or the partition wall 22 is provided with a lock button 20 that can be broken, and the lock button 20 is provided in the first detection hole 2
Engage in 7.

The recording prevention member 21 is attached to the lid 7 so as to be horizontally rotatable around a pivot 40 by utilizing the lightening space portion 13 of the lid 7. Specifically, the recording prevention member 21 is provided with a valve plate 34 that closes the second detection hole 29 at a lower end or an upper end of a vertical main body wall 33, and the boss 3 is provided at one end of the main body wall 33 in the front-rear direction.
6, the boss 36 is rotatably inserted and supported by a pivot 40 that is erected on the side of the main surface wall 9 of the lid 7 or the inner peripheral wall 11 or the side wall 10 facing the lightening space portion 13. The recording prevention member 21 has an operation portion 37, and the operation portion 37 is provided with an operation port 32 provided on the upper wall 25 or the lower wall 26 of the main body case 1.
To face. Between the recording prevention member 21 and the lid 7, means 41 and 42 for positioning and holding the recording prevention member 21 at a position where the second detection hole 29 is closed and at a position where the second detection hole 29 is opened are provided.

[0010]

When the lock button 20 is engaged with the first detection hole 27, the lid 7 is kept closed. When exchanging the disc 2 in the main body case 1, the lock button 20 is pushed in from the first detection hole 27 to break it off from the lid 7. Therefore, the lid 7 can be opened and the disc 2 can be taken out from the opening 5 and replaced with another single disc. In the disc cartridge in which the disc 2 has been replaced in this way, the first detection hole 27 is in the open state without the lock button 20, so that by inserting the detection member on the hardware side into the first detection hole 27, the lid 7 is already removed. Can be determined to have been opened. After the lock button 20 is broken off, the lock button 20 can be prevented from being mixed into the recording prevention member 21 by the partition wall 22, so that there is no problem such as biting when the recording prevention member 21 is opened and closed.

With the lid 7 closed, the second detection hole 29 can be opened / closed by rotating the recording prevention member 21 around the pivot 40 by the operation portion 37 facing the operation port 32. When loaded in the disk drive, the drive side detection member
By inserting into the detection hole 29, normally, the second detection hole 2
It is determined that recording is possible in the closed state of 9 and recording is impossible in the open state.

When the lid 7 is opened when the disc 2 is replaced, the recording prevention member 21 is taken out of the main body case 1 while being attached to the lid 7, so that the disc 2 is damaged without interfering with the recording prevention member 21. It can be taken in and out through the opening 5 without being added. Since the lid 7 is provided with the lightening space 13 between the main surface wall 9 and the inner peripheral wall 11, the weight can be reduced and the opening and closing can be smoothly performed.

[0013]

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 made of a plastic upper case 1a and a lower case 1b that are abutted and integrally coupled to each other. The main body case 1 is used for reading and writing signals from the left and right central portions of the front side portions of the upper and lower cases 1a and 1b toward the rear. The window 3 is opened, and the window 3 is closed by a shutter 4 that slides left and right.

In FIGS. 1 and 2, an opening 5 for inserting and removing the disc 2 is provided at the rear end of the main body case 1. The opening 5 includes a main surface opening 5a formed over the entire left and right length of the rear side surface 8 of the body case 1, and side surface openings 5b and 5b opened only on the rear end side of the left and right side walls 6 and 6 of the body case 1. , It opens in a U shape in a plan view. This opening 5 can be opened and closed with a lid 7.

The lid 7 is of a double-door type in which a first lid 7A and a second lid 7B, which are made of plastic and have a symmetrical shape, are aligned at the left and right centers. First lid 7A and second lid 7B
Are a main surface wall 9, a side wall 10 that extends from one end of the main surface wall 9 in the left-right direction to the front at a substantially right angle, and an arc shape along the circumference of the disk 2 on the inner surface side of the main surface wall 9. Has an inner peripheral wall 11 for restricting the position of the disk 2, and a rotation base end wall 12 that connects the front end of the side wall 10 and the front end of the inner peripheral wall 11 substantially in parallel with the main surface wall 9. . The main surface wall 9 is formed so as to enter the inside of the main surface opening 5a to 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 substantially triangular shape hollow space in plan view which 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 13, 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.

The first lid 7A and the second lid 7B are formed by integrally projecting the pivot 17 in the vertical direction from a corner portion where the side wall 10 and the rotary base wall 12 intersect, or a position near this corner portion. The upper and lower ends of the pivot 17 are attached to the upper and lower cases 1a and 1b.
Rotatably engages with a shaft hole (not shown) provided in the vicinity of the rear end of each side wall 6. The first lid 7A and the second lid 7B are
The main body opening 5a and the side surface opening 5b of the opening 5 are closed, respectively, and the main surface opening 5a is opened by rotating 90 degrees horizontally on a plane parallel to the plane of the body case 1 about the pivot 17. Can be switched between fully open positions.

The lid 7 is provided with a lock button 20 for holding the lid 7 in a closed posture so as not to open it carelessly, and a recording prevention member 21 for preventing re-recording on the disc 2.
As shown in FIGS. 1 and 3, inside the lightening space 13 of each of the lids 7A and 7B, a partition wall 22 is partitioned so that the lock button 20 and the recording prevention member 21 can be housed separately. The accommodating portions 23 and 24 are formed. The partition wall 22 is provided between the main surface wall 9 and the inner peripheral wall 11 or between the inner peripheral wall 11 and the side surface wall 10, or between the main surface wall 9 and the side surface wall 1 in the vertical and horizontal directions. Of these, the partition 22 for partitioning the lock button housing 23 and the recording prevention member housing 24
When the lids 7A and 7B are closed, a first detection hole 27 for lid open / close determination and a second detection / non-recordable determination provided on the upper and lower walls 25/26 of the main body case 1 at positions where the phases are shifted close to each other.
The detection hole 29 and the detection hole 29 are arranged so as to be separated from each other.

As shown in FIG. 3, a vertical cylinder 30 is integrally formed on the side of the partition wall 22 of each of the lids 7A and 7B facing the lock button housing portion 23, and the lock button 2 is formed in the upper part of the vertical cylinder 30.
0 is attached integrally so as to be breakable via a connecting portion 31 having a thin dangerous cross section. The upper wall 25 of the main body case 1 is provided with a first detection hole 27 which communicates with the vertical cylinder 30 when the respective lids 7A and 7B are closed. A part of the lock button 20 is inserted into the first detection hole 27. Let This lock button 20
The lids 7A and 7B are held in the closed posture by engaging the first detection hole 27 with. However, when the lock button 20 is strongly pushed through the first detection hole 27, the joint portion 31 is broken due to stress concentration and is broken off from the partition wall 22.

The lock button 20 is torn off when the disc 2 is taken out and put in for replacement, the respective lids 7A and 7B.
Done when opening. Broken lock button 2
0 does not mix into the recording prevention member accommodating portion 24 by the partition wall 22 and can be discharged to the outside of the main body case 1 by opening the respective lids 7A and 7B.

On the other hand, the recording prevention member 21 is attached to each of the first lid 7A and the second lid 7B in the case of the double-sided use type in which the disk cartridge is turned upside down to use both sides of the disk 2, and in the case of the single-sided use type. Is the first lid A
Alternatively, it is attached to either one of the second lids B. A second detection hole 29 opened and closed by the recording prevention member 21 in the main body case 1 and an operation port 32 for operating the recording prevention member 21 are located in the region of the lightening space 13 when the lid 7 is closed. To be provided. At that time, the second detection hole 29 and the operation port 32 are symmetrically provided on the left and right sides of the upper and lower walls 25 and 26 of the main body case 1 in the case of the double-sided use type, and the upper wall 25 or the lower wall in the case of the single-sided use type. It is provided on one side of 26.

As shown in FIG. 4, the recording prevention member 21 is a plastic molded product and is composed of a vertical flat plate-shaped main wall 33, a valve plate 34 which is formed at a right angle to a lower end or an upper end of the main wall 33, and a main wall. It has a boss 36 having a shaft hole 35 formed vertically at the front end or the rear end of 33, and an operating portion 37 protruding from the upper end or the lower end of the main wall 33 on the side where the valve plate 34 is not attached. On the other hand, the inner peripheral wall 1 of the first lid 7A or the second lid 7B
The boss seat 39 is formed by horizontally projecting from the lower end or the upper end on the side facing the lightening space portion 13.
The pivot 40 is vertically installed in an upward posture or a downward posture. Thus, the recording prevention member 21 is attached to the first lid 7A or the second lid 7B so as to be horizontally rotatable around the pivot 40 by inserting and supporting the pivot 40 in the shaft hole 35 of the boss 36. In the case of the double-sided type, since the recording prevention members 21 arranged symmetrically are installed upside down, it is necessary to prevent the recording prevention member 21 from coming off the pivot 40. Therefore, for example, the diameter of the shaft hole 35 is set to the axis 4
0 diameter or slightly smaller (about 0.0
1-0.03mm) Either set them together for a slight fit, or as shown in FIG.
Is provided so that the shaft diameter can be expanded and contracted, and a retaining collar 44 is provided at the tip of the pivot 40 and is inserted into the shaft hole 35 to prevent the shaft from coming off.

As described above, the first member provided with the recording prevention member 21.
When the opening 7 of the lid 7A or the second lid 7B is closed, the operation portion 37 of the recording prevention member 21 faces the operation opening 32. Therefore, the operation portion 37 is pinched from the outside of the main body case 1 to pivot the recording prevention member 21. By horizontally rotating around 40, the second detection hole 29 can be opened and closed by the valve plate 34. At the closed position or the opened position of the second detection hole 29, the moderation convex portion 41 projecting from the rotating front end portion of the main body wall 33 of the recording prevention member 21 is provided on the first lid 7A or the second lid 7B. Wall 33
Two concave portions 42, 42 provided in the partition wall 22 provided between the main surface wall 9 and the inner peripheral wall 11 along the rotation trajectory of the rotation tip of the
It is stopped and held by engaging with either one of them.

In the above embodiment, the convex portion 4 of the recording prevention member 21 is used.
Although 1 and the concave portion 42 of the partition wall 22 constitute the positioning means for the recording prevention member 21, on the contrary, the convex portion 41 may be provided in the partition wall 22 and the concave portion 42 may be provided in the recording prevention member 21. Further, in the above embodiment, the first detection hole 27 is provided in the upper wall 25 of the main body case 1, and the lock button 20 is provided in each of the lids 7A.
Although the lock button 20 is provided near the upper end of the partition wall 22 of B, on the contrary, the lock button 20 is provided near the lower end of the partition wall 22 of each of the lids 7A and 7B, and the lock button 20 is provided on the lower wall 26 of the main body case 1. It can also be inserted into the 1 detection hole 27.

If the lid 7 is of a double-door type having the first lid 7A and the second lid 7B on the left and right as in the above embodiment, the turning radius can be reduced, so that the turning angle of 90 degrees is sufficient. Together with this, it is possible to further reduce the rotation space of the lid 7 required outside the main body case 1, and it is advantageous to avoid contact with other peripheral objects. However, the present invention is not limited to this, and as shown in FIG. The single lid 7 is a main surface wall 9 that covers the entire main surface opening 5a.
And the left and right side surface openings 5b, which are continuously provided at both ends of the main surface wall 9.
5b, a turning base that connects the side walls 10 and 10, the inner peripheral wall 11 provided on the inner surface side of the main surface wall 9, the front end parts of the left and right side wall parts 10 and the left and right front end parts of the inner peripheral wall 11. End wall 12
And a pivoting tip wall 12 ', and a lightening space 13 is formed between the left and right side walls 10 and 10 and the main surface wall 9, respectively. In this case, one side wall 10
The pivot 17 is provided at the corner where the rotation base end wall 12 and the pivot base end wall 12 intersect with each other, or the lock button 20 and the recording prevention member 21 are provided inside the lightening space 13 on both the left and right sides of the lid 7, Alternatively, it is mounted inside one of the lightening space portions 13. The opening 5 may be provided on any one of the left and right side walls 6 in addition to the rear side surface 8 of the main body case 1.

[0026]

According to the present invention, the lid 7 for opening and closing the opening 5 for loading and unloading the disc is provided with a lightening space portion 13 to make the whole lid 7 lighter in weight and open and close more easily. Lock the part 13 with the lock button 20 and the recording prevention member 2.
The lock button 20 and the recording prevention member 21 can be easily and compactly attached to the lid 7 by using the lock button 20 and the recording prevention member 21.

The lock button 20 is the upper wall 2 of the main body case 1.
5 or the first detection hole 27 provided in the lower wall 26, the closed state of the lid 7 is maintained and the lid 7 can be prevented from being opened accidentally. Moreover, when the disc 2 in the main body case 1 is exchanged, the lock button 20 is intentionally broken off, and the hardware side detection member is inserted into the first detection hole 27 to open / close the first detection hole 27. The presence or absence of the lock button 20 can be detected, and it can be easily determined whether or not the disk cartridge is a disk cartridge after the disk is replaced. Since the lock button 20 that has been broken off does not enter the recording prevention member 21 through the partition wall 22, it is possible to solve the problem of being caught when the recording prevention member 21 is opened and closed. The partition wall 22 also has a function of reinforcing the lid 7, and can also be used as a support wall for integrally molding the lock button 20.

The second detection hole 29 is the upper wall 25 of the main body case 1.
Alternatively, since it is provided on the lower wall 26, the positional accuracy can be improved as compared with the detection hole provided on the conventional lid together with the recording prevention member. Further, since it is not necessary to provide the fitting recessed portion, which is required in the conventional disk cartridge in which both the recording prevention member and the first detection hole are provided in the lid, in the main body case 1, the opening portion of the main body case 1 is accordingly increased. It is advantageous because the strength around 5 can be secured.

[Brief description of drawings]

FIG. 1 is an internal plan view of a main part.

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

FIG. 3 is a longitudinal sectional view of a main part.

FIG. 4 is an exploded perspective view of a main part.

FIG. 5 is a vertical cross-sectional view of a main part showing another embodiment.

FIG. 6 is a partially cutaway plan view of the whole showing still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 2 Disc 5 Opening 5a Main surface opening 5b Side opening 7 Lid 9 Main surface wall 10 Side wall 11 Inner peripheral wall 12 Rotating base end wall 13 Thinning space 20 Lock button 21 Recording prevention member 22 Partition wall 25 Upper wall 26 Lower wall 27 First detection hole 29 Second detection hole 32 Operation port 35 Shaft hole 37 Operation part 40 Pivot 41/42 of recording prevention member Concavo-convex part (positioning means)

Claims (4)

[Claims] 1. A main body case 1 in which a disc 2 of a recording medium is rotatably accommodated is provided with an opening 5 for inserting and removing the disc, and the opening 5 extends over the entire length of one side surface 8 of the main body case 1. The main body opening 5a is formed, and side surface openings 5b and 5b are formed at the ends of the other side walls 6 and 6 of the main body case 1 adjacent to both ends of the one side surface 8 toward the one side surface 8 respectively. 1 is a disk cartridge in which a lid 7 for opening and closing the opening 5 is horizontally rotatable around a pivot 17 on a plane parallel to the plane of the body case 1, and the lid 7 is closed on the body case 1. A first detection hole 27 for opening / closing the lid is formed in the upper wall 25 or the lower wall 26 facing the upper and lower surfaces of the lid 7 in this state, and the first detection hole 27 is formed.
The second for determining whether or not recording is possible at a position slightly apart from the vertical direction of the
The detection hole 29 is opened, and the lid 7 is formed so as to form a main surface wall 9 that covers the main surface opening 5a by closing the main surface opening 5a and a side surface opening 5b that extends from one end of the main surface wall 9 at a substantially right angle. It has a side wall 10 that enters and closes the inside thereof, and 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 extension side end of the side wall 10 Section and one end of the inner peripheral wall 11 are integrally connected, and a lightening space 13 is provided between the main surface wall 9 and the inner peripheral wall 11 in a vertically penetrating manner. First, with the lid 7 closed
A partition wall 22 is provided between the detection hole 27 and the second detection hole 29 to partition the first detection hole 27 and the second detection hole 29. 1 Foldable lock button 20 that engages with the detection hole 27 to open and close the first detection hole 27, and recording prevention member 2 that opens and closes the second detection hole 29
1. A disk cartridge, wherein 1 and 1 are attached. 2. The recording prevention member 21 has an operation portion 37, and the operation portion 37 is provided with an operation port 32 provided in the body case 1.
The disk cartridge according to claim 1, which faces the disk cartridge. 3. The recording prevention member 21 has a lightening space 1
3. The disk cartridge according to claim 1, wherein the disk cartridge is mounted so as to be horizontally rotatable around a pivot 40 between a position where the second detection hole 29 is closed and a position where the second detection hole 29 is opened. 4. The disk cartridge according to claim 3, wherein the recording prevention member 21 has a shaft hole 35, and a pivot 40 is inserted in the shaft hole 35 in a state of preventing the shaft from coming off.