JPH09245456A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the strength of the upper and lower surface walls at the periphery of the entrance or exit in which strength tends to become insufficient in a disk cartridge having an entrance or exit of disk, being closed with a cover which can be opened freely, at the rear part of the case. SOLUTION: A main cover section 9 of a cover 7 occupying the space between the disk and entrance 6 is provided with a specifying wall 13 for specifying a limit of play of disk and a stationary wall 14. The stationary wall 14 is formed as the recessed area from the specifying wall 13 in such a direction as isolating from the disk 1. A reinforcing projection 19 is provided at the internal surface of the vertical wall by making use of the space between the stationary wall 14 and disk. The projection 19 is projected in opposition at the upper and lower sides keeping the interval allowing loading or unloading of the disk.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge of the type having a disc inlet / outlet on a peripheral side surface of a case and closing the inlet / outlet with an openable / closable lid.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 5-242626 discloses a disk cartridge of this type. There is only a slight difference between the width of the case and the diameter of the disc.Therefore, the lid has a fitting wall that fits inside the case by opening the disc inlet and outlet over the entire width of the rear end surface of the case. The body is blocking the doorway. The lid is rotatably supported by a shaft provided at the rear corner of the case and can swing open from the closed position over 180 degrees. On the inner surface of the fitting wall of the lid body, there is provided a partially arcuate restricting surface that defines the floating limit of the disk.

[0003]

In the above-mentioned disc cartridge in which the entrance and exit are opened over the entire width of the rear end surface of the case, most of the rear end wall is removed, so that the strength of the upper and lower surface walls at the rear portion of the case is reduced. Unavoidable. In order to facilitate the loading and unloading of the disc, the rigidity of the upper and lower walls further decreases when the entrance and exit are opened in a continuous manner at the left and right ends of the case rear end face, including the rear parts of the left and right side walls. . As described above, in the disc cartridge having the large opening for inserting and ejecting the disc, the upper and lower surface walls may be damaged by, for example, a drop impact.

It is possible to provide reinforcing ribs or thick portions on the inner surfaces of the upper and lower walls of the case, but in such a case it becomes difficult to take in and out the disc. In the conventional disc cartridge, since the space between the disc and the inlet / outlet is closed by a thick fitting wall equal to the vertical facing interval of the upper and lower cases, it is more difficult to provide a reinforcing structure such as a rib. When the lid is closed, there is also a disadvantage that dust or the like is scratched by the regulation surface on the inner surface of the fitting wall.

The lid which is swingably opened and closed is supported by a case,
The position of the lid closes easily when the lid is closed due to wear of the swing center shaft or variation in the clearance between the case and the case, and it is forcibly pushed inward from the normal position due to user error or mischief. May occur. In the worst case, a part of the regulation surface touches the edge of the disc,
There is a possibility that the disk cannot be driven to rotate properly.

The object of the present invention is to improve the rigidity of the upper and lower walls of the disk cartridge in which the disk inlet / outlet opening is formed in the case, so that a strong impact force or a large force can be obtained by dropping or colliding with another object. Another object of the present invention is to provide a disc cartridge having excellent durability that does not crack or break even when subjected to an external force. An object of the present invention is to always receive and support the lid at an appropriate closed position, and even if the lid is pushed forcibly for mischief, the lid is pushed into the case beyond the appropriate closed position. The purpose is to provide a disk cartridge that can prevent the occurrence of such damage.

An object of the present invention is to provide a disc cartridge which can prevent dust in the vicinity of the entrance from being scraped into the disc accommodating portion inside the case by the regulation surface when the lid is closed. An object of the present invention is to provide a read / write error when dust entering from the reference hole or the like adheres to the disk surface when the reference hole or the like for the positioning pin is opened facing the space occupied by the lid in the case. It is to provide a disk cartridge that can prevent the occurrence of

[0008]

DISCLOSURE OF THE INVENTION In a disk cartridge according to the present invention, an entrance / exit 6 for the disk 1 is opened on a peripheral side surface of a case 2 for rotatably accommodating the disk 1, and a lid for closing the entrance / exit 6. A case 7 is supported by the case 2 so as to be openable and closable. The lid body 7 includes a lid main portion 9 that enters the case 2 and occupies the space between the disk 1 and the entrance / exit 6. At the front edge of the lid main portion 9 that faces the peripheral edge of the disc 1, a regulation wall 13 that defines the floating limit of the disc 1 and a stop wall 14 that is recessed away from the disc 1 from the regulation wall 13 are provided. . Between the stopper wall 14 and the peripheral edge of the disc 1, at least one of the inner surfaces of the upper and lower walls of the case 2 is provided with reinforcing protrusions 19 at a vertical interval which allows the disc 1 to move in and out.

Specifically, the protrusions 19 are provided on the upper and lower walls of the case 2 so as to vertically oppose each other. The distance between the upper and lower protrusions 19 facing each other is set to be smaller than the thickness of the lid main portion 19,
9 also serves as a restriction piece for restricting the excessive closing operation of the lid 7. The doorway 6 has a main opening 6a on the rear surface of the case 2,
The case 2 is opened in a U shape including the side openings 6b, 6b on the left and right sides of the case 2. A lid 7 is configured by a first lid 7A that swings and opens and closes the entrance / exit 6 in a double-door manner and a second lid 7B. At the front edge side ends of the first lid 7A and the second lid 7B near the swing center, the regulation walls 13 each having a partial arc shape are provided.
A partial arcuate stop wall 14 is formed in a concave shape adjacent to 3.
In a disk cartridge in which a pin hole 27 for a positioning pin is provided in at least one of the upper and lower walls of the case 2 facing the upper and lower surfaces of the lid main portion 9, a positioning is performed through the pin hole 27 into the case. The pin vacant space 25 is formed in the lid main portion 9 so as to open vertically.

[0010]

The protrusions 19 provided on the inner surface of the case 2 reinforce the upper and lower walls of the area around the entrance / exit 6 to enhance the rigidity of the case 2. The protrusions 19 are provided on the inner surfaces of the upper and lower walls without obstructing the opening and closing of the lid 7, and the lid main portion 9 is further provided in the lid closed state.
At the same time, the stopper wall 14 and the restriction wall 13 are provided on the front edge of the lid main portion 9 in order to satisfy the above-mentioned limitation of the floating limit of the disk 1.

In the closed state of the lid, the protrusion 19 is the main portion 9 of the lid.
The stopper wall 14 is received to prevent the lid 7 from being pushed further into the case. Therefore, the upper and lower protrusions 19
The facing interval is set smaller than the thickness dimension of the lid main portion 9.
The projections 19 also serve to prevent the dust scratched by the lid main portion 9 from further entering the inside of the case and adhering to the surface of the disc 1.

The lid body 7 is composed of a first lid 7A and a second lid 7B, and regulating walls 13 and 13 are provided at the front edge side ends of the respective lids 7A and 7B, and a part is provided between the left and right regulating walls 13 and 13. When the arcuate stop walls 14 are provided, the protrusions 19 are provided on the upper and lower walls near the center in the left and right of the entrance and exit 6, and the central part of the opening where the strength of the upper and lower walls tends to be insufficient can be effectively reinforced.

[0013]

【Example】

(First Embodiment) FIGS. 1 to 4 show a first embodiment of an optical disk cartridge according to the present invention. In FIG. 2, the optical disk cartridge includes a disk 1 on which signals such as video, audio, and information are recorded on both upper and lower surfaces, a case 2 for rotatably housing the disk 1, and a horizontal center of the upper and lower walls of the case 2. A shutter 3 that slides a signal reading / writing window 4 provided in each of them to the left and right, and a shutter 3
It is composed of a lock mechanism that locks and holds the slide lock at the central closed position so that it cannot slide.

The case 2 is formed by joining and fixing a plastically molded upper case 2a and lower case 2b in a lid-fitting manner. Restricting ribs 5 that define the floating limit of the disk 1 are provided in the front half of the inner surfaces of the upper and lower cases 2a and 2b so as to project in a partially arcuate shape.

An opening 6 for opening and closing the disk 1 is opened at the rear of the case 2, and a lid 7 for opening and closing the opening 6 is swingably supported by the case 2.
Positioning recesses 8 are provided in a U shape near the rear ends of the left and right side surfaces of the case 2. Doorway 6 is case 2
A main opening 6a that occupies the entire left and right width of the rear end face, and a side opening 6 that includes the left and right recesses 8 and is opened at the rear of the left and right sidewalls of the case 2.
b · 6b, the opening is in a U shape in a plan view.
In order to improve the structural strength of the entrance / exit 6, the opening wall portions 2c of the upper and lower cases 2a and 2b facing the main opening 6a and the left and right side openings 6b are formed to be slightly thicker than the upper and lower main surface walls as shown in FIG. .

The lid body 7 is composed of a left-right symmetrical first lid 7A and a second lid 7B, which are respectively plastic-molded. FIG.
In 1st lid 7A and 2nd lid 7B,
It is provided with a lid main portion 9 which enters inside and occupies the space between the disc 1 and the entrance / exit 6.

In FIG. 1, the lid main portion 9 of the first lid 7A has a rear wall 11 that closes the left half of the main opening 6a of the entrance / exit 6, a side wall 12 that closes the left side opening 6b, and a peripheral edge of the disk 1. The restriction wall 13 and the stop wall 14 formed along the circumference are continuously formed in a circular shape to form a substantially trapezoidal hollow frame shape having upper and lower surfaces opened, and the volume and weight thereof are minimized. On the outer surface of the side wall 12, a U-shaped cutout recess 1 corresponding to the recess 8 on the left side is formed.
5, a leg piece 16 is provided on the front end surface of the side wall 12 so as to project forward. This leg piece 16 is installed on the inner surface of the lower case 2b so as to stand upright.
By rotatably pivoting at 7, the first lid 7 as a whole is closed at a closed position that simultaneously closes the main opening 6a and the left side opening 6b, and pivots about the shaft 17 clockwise by 90 degrees or more. Then, the main opening 6a and the side opening 6b can be swung between the fully opened positions. In order to prevent the disc 1 from getting in and out of the way, the shaft 17 is provided as close to the case side end as possible.

In order to define the floating limit of the rear peripheral surface of the disk 1, a partially arcuate restriction wall 13 is provided adjacent to the inner end of the leg piece 16, and a contact wall is provided between the restriction wall 13 and the rear wall 11. The stop wall 14 is provided in a partial arc shape. The stopper wall 14 is formed so as to be recessed in a direction away from the peripheral surface of the disk 1 with reference to the restriction wall 13. Utilizing the space between the stopper wall 14 and the disk 1, the protrusions 19 for reinforcement are formed in a partial arc shape on the inner surfaces of the upper and lower walls of the upper and lower cases 2a and 2b.

More specifically, as shown in FIGS. 2 and 3, a protrusion 19 is provided as a partially arcuate rib along the contact wall 14 at the closed position, and the upper and lower walls of the opening center portion where the strength tends to be insufficient. To reinforce. The width dimension of the protrusion 19 is equal to the amount of depression of the stopper wall 14 from the regulation wall 13,
The facing interval of 9 is set sufficiently larger than the thickness dimension of the disc 1 and smaller than the thickness dimension of the lid main portion 9. In order to prevent the disc 1 from being caught when taking in and out, the protrusion 19
As shown in FIG. 3, a guide surface 20 is provided on at least a part of the inner surface side of the guide member 20 so as to incline upward toward the projecting end surface of the projection 19. The protrusion 19 also serves as a restricting piece for restricting the excessive lid closing operation of the lid body 7. When the lid body 7 is properly closed, the protrusion 1
The outer surface of 9 receives and supports the stop wall 14 to surely prevent the lid main portion 9 from being pushed further toward the disk storage portion side by, for example, tampering.

In FIG. 2, an arcuate claw 21 is provided at the lower portion of the front surface of the rear wall 11 of the lid main portion 9 so as to project in the space. When the claw 21 is used to close the first lid 7A, the lower case 2
By engaging with the protruding pin 22 from b, the entire first lid 7A is drawn and guided into the inlet / outlet 6, and when the first lid 7A is completely closed, the first lid 7A cooperates with the shaft 17 to close the first lid 7A. 7A is held and fixed so that it cannot rattle. A finger hook 23 for opening the first lid 7A is formed in a recess near the rear end of the rear wall 11.

As shown in FIG. 1, the inside of the lid main portion 9 which is entirely formed in the shape of a hollow frame is divided into front and rear by a crosspiece 24 which connects the inner surface of the cutout recess 15 of the side wall 12 and the regulation wall 13. The space inside the frame on the front side of the cross section 24 is used as a space 25 into which a positioning pin provided on the player or disk drive side enters. Facing this void 25,
As shown in FIG. 4, the bulging portion 2 that contacts the upper and lower surfaces of the lid main portion 9
6 is provided on the inner surface of the upper and lower cases 2a and 2b, and the pin hole 27 is provided in the bulging portion 26 to completely separate the empty space 25 from the disk storage portion, so that dust that has entered through the pin hole 27 can be separated from the disk. It is possible to prevent the cross section 24 from entering the storage section. The bulging portion 26 also serves to reinforce the upper and lower walls.

As described above, the second lid 7B is the first lid 7A.
Since the function and action of each part are the same, the same members are designated by the same reference numerals and the description thereof will be omitted. The second lid 7B and the first lid 7A have opposite swivel directions when opened and closed, and swing and swivel in a double door shape to open and close the doorway 6.

When the disc 1 housed in the case 2 and the single disc sold separately from the disc cartridge are compatible, the single disc is housed in the case 2 to record video and audio. It is supposed to be fixed. In such a case, if the disc is scratched or soiled due to messy storage and handling of the disc, re-recording of images and sounds cannot be performed completely. That is, it is difficult to distinguish between a disc cartridge whose quality is guaranteed and a disc cartridge in which a single disc is replaced, and the quality and performance of the disc cartridge may be suspected.

In order to avoid such a situation and guarantee the quality of a newly purchased disc cartridge, a breakable sealing claw 29 is provided at the center of the doorway 6 as shown in FIG. And the latching portion 30 at the adjacent end of the second lid 7B is received from the outer surface side to limit the opening operation of both lids 7A and 7B. Therefore, when the disk 1 and the single disk are replaced, the sealing claw 29 is broken off. Sealing claw 2
By removing 9, both lids 7A and 7B can be freely opened and closed,
The user can see at a glance that the disc in the case 2 may not be new. The sealing claw 29 can be formed integrally with either one of the upper and lower cases 2a and 2b as shown in FIG.
It is also possible to project in a vertically opposed manner on each of a and 2b.

In the disk cartridge constructed as described above, after removing the sealing claw 29, the first and second lids 7A and 7B are swung back and forth by 90 degrees from the closed position, respectively. The doorway 6 can be opened by projecting the main part 9 out of the case. In this state, the case 2 is tilted so that part of the peripheral edge of the disc 1 faces the entrance 6
The disc 1 can be easily removed from the case 2. According to the reverse procedure, the disk 1 or the single disk can be stored in the case 2, and the entire entrance / exit 6 can be closed by the both lids 7A and 7B.
When the lids 7A and 7B are closed, dust and the like attached near the inner edge of the doorway 6 may be scraped into the case by the lid main portion 9. Even in such a case, the scratched dust or foreign matter is received by the projection 19 that separates the lids 7A and 7B from the disc 1, so that dust or the like adheres to the disc surface of the disc 1 and a read / write error occurs. Prevent well.

(Second Embodiment) FIG. 5 shows a second embodiment of the present invention in which the lid structure is changed, and the disc 1 of the lid main portion 9 is shown.
Partial arc-shaped restriction wall 1 over almost the entire surface facing
3, the upper and lower corners of the restriction wall 13 are respectively recessed in a direction away from the disk 1 to form the stopper wall 14, and the circumferential length of the projection 19 is approximately equal to the circumferential length of the restriction wall 13. Matched. That is, the formation range of the protrusions 19 is expanded to further improve the strength of the upper and lower surface walls.

(Third Embodiment) FIG. 6 shows a third embodiment of the present invention in which the shape of the protrusion 19 is changed. The protrusion 19 along the peripheral edge of the disk 1 is placed in the space of the lid main portion 9. The auxiliary protrusion 32 that enters is provided on the inner surfaces of the upper and lower cases 2a and 2b,
Both protrusions 19 and 32 are designed to further improve the strength of the upper and lower walls. The auxiliary projection 32 is formed by a rib having a partial arc shape with the shaft 17 as the center, and the auxiliary projection 32 intersects with the restriction wall 13.
Alternatively, the retaining wall 14 is provided with an escape groove 33 which is fitted onto the auxiliary protrusion 32.

Other than the above, the first lid 7A and the second lid 7B do not have to be symmetrical. Further, the opening / closing structure of both lids 7A and 7B can be changed so that they can be slid along the main opening 6a. The leg piece 16 in the first embodiment can be formed to have the same thickness as the lid main portion 9. Further, the entrance / exit 6 can be opened and closed by one lid 7, and in this case, the lid 7 may be pivotally supported by either one of the left and right shafts 17 so as to swing and open. Including these cases, an elastic engaging portion is provided at the swinging tip of the lid body 7, and this can be press-fitted to the other shaft 17 to hold the lid body 7 closed.

Further, in the first embodiment, the stop wall 14
Although the cover 7 is provided near the center of the left and right sides of the lid 7, it is not necessary to arrange the stop wall 14 near the front end of each of the lids 7A and 7B, and the restriction wall 13 is provided between the left and right stop walls 14 and 14. Can be provided. The control wall 13 and the stop wall 14 are provided with respective lids 7A and 7B.
It is possible to provide a plurality of each. The recess depth and shape of the retaining wall 14 can be freely changed within the range where the strength of the lid 7 is not insufficient, and need not be a partial arc shape. The protrusion 19 can be formed in the shape of a plurality of intermittent ribs or pins, or a base plate. The doorway 6 can be opened on either the left or right side surface of the case 2. The protrusion 19 can be provided on only one of the upper and lower surfaces.

[0030]

According to the present invention, the lid 7 is provided with the restricting wall 13 for restricting the disk movement and the stop wall 14 recessed in the direction away from the disk 1 from the restricting wall 13, and the stop wall 14 and the disk 1 are provided. The protrusion 19 is provided by utilizing the space between
The upper and lower walls of the periphery of the are reinforced by the protrusions 19. Therefore, the rigidity of the upper and lower walls near the entrance / exit 6 of the case 2 is strengthened to prevent the case 2 from being damaged due to a drop or a collision with another object, while maintaining the ease of taking in and out the disc 1. The durability of the case 2 can be improved.

Since the projection 19 is used as a restriction piece and the lid 19 receives the stopper wall 14 of the lid 7 at the time of closing the lid, the lid 7 is forced by the user's carelessness or mischief. It is possible to surely prevent the disk 1 from being pushed in and coming into contact with the disc 1, and thus it is possible to reliably prevent the occurrence of malfunctions or malfunctions of the player or the like due to the abnormality of the lid position. Since the protrusion 19 is provided between the lid body 7 and the disc 1, the dust scratched by the lid body 7 can be received by the protrusion 19, and the dust can be prevented from entering the disc accommodating portion side and contaminated. It is also possible to prevent read / write errors due to attachment to the disc surface.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a lid structure of a disc entrance / exit in a first embodiment.

FIG. 2 is a partially cutaway plan view of the disk cartridge of the first embodiment.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a vertical sectional side view showing a lid structure of a second embodiment at a position equivalent to that of FIG.

FIG. 6 is an internal plan view of a disc cartridge showing a protrusion structure of a third embodiment.

[Explanation of symbols]

 1 Disc 2 Case 6 Doorway 7 Lid 7A 1st Lid 7B 2nd Lid 9 Lid Main Part 13 Control Wall 14 Stop Wall 19 Protrusion

Claims (4)

[Claims] 1. An entrance / exit 6 for the disk 1 is opened on a peripheral side surface of a case 2 for rotatably accommodating the disk 1, and a lid 7 for closing the entrance / exit 6 is supported by the case 2 so as to be openable / closable. In the disc cartridge, the lid body 7 is provided with a lid main portion 9 that enters the case 2 and occupies the space between the disc 1 and the inlet / outlet 6. In front of the lid main portion 9 that faces the peripheral edge of the disc 1. At the edge, a regulation wall 13 that regulates the floating limit of the disc 1 and a stop wall 14 that is recessed in a direction away from the disc 1 from the regulation wall 13 are formed.
Is provided between the stopper wall 14 and the peripheral edge of the disc 1, and at least one of the inner surfaces of the upper and lower walls of the case 2 is provided with a reinforcing projection 19 at a vertical interval allowing the disc 1 to move in and out. Disc cartridge that is protruding. 2. The projections 19 are provided on the upper and lower walls of the case 2 so as to vertically oppose each other, and the distance between the upper and lower projections 19 is set to be smaller than the thickness of the lid main portion 19. The disk cartridge according to claim 1, wherein the disk cartridge doubles as a restriction piece for restricting an excessive closing operation of the lid body 7. 3. The entrance / exit 6 is a main opening 6a on the rear surface of the case 2.
And a side opening 6b, 6b at the rear of the left and right side surfaces of the case 2 in a U-shape. The first lid 7A swings and opens and closes the doorway 6 in a double door shape.
And the second lid 7B constitute the lid body 7, and the first lid 7A and the second lid 7B are provided at the front edge side ends near the swing center.
3. The disk cartridge according to claim 1, wherein a partial arcuate restriction wall 13 is provided, and a partial arcuate stop wall 14 is formed in a recess adjacent to the restriction wall 13. 4. A pin hole 27 for a positioning pin is provided in at least one of the upper and lower walls of the case 2 facing the upper and lower surfaces of the lid main part 9, and the pin hole 27 enters the case through the pin hole 27. The disk cartridge according to claim 1, 2 or 3, wherein the positioning pin void 25 is formed in the lid main portion 9 so as to open vertically.