JP2003054673A - Recording medium storage case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a recording medium storage case thin. SOLUTION: This recording medium storing case comprises a case main body 71 and a clear cover 72 fitted freely rotatively on a fulcrum protrusion 92 formed at the base end of the case main body 71. Four sides of the cover 72 are formed able to be stored at the inside of the side wall of the case main body. The main body 71 is made of a thermoplastic synthetic resin having an Izod strength of 5 kj/m<2> for protecting the cover 72. The base end of the main body 71 is formed with the fulcrum protrusion 92 through an elastically deformable tab piece 90 for easing the shock applied to the fulcrum recess 89 of the cover 72 and for preventing the breakage of the easily breakable support part 88 of the cover 72 by the tab piece 90. By this a thin yet strong storage case can be obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium storage case, and more particularly to a CD, a CD-R, a CD-.
The present invention relates to a case for accommodating a disc-shaped optical recording medium such as RW and DVD.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 10, a storage case 1 for storing an optical disk 15 which is a disk-shaped medium typified by a compact disk (CD) is an optical disk 1.
5, a tray portion 2 for storing 5, a case body 3 for storing the tray portion 2, and a tray portion 2 for the case body 3.
And a cover portion (opening / closing lid) 4 for accommodating and closing the lid.

The cover portion 4 has left and right fulcrums 6a provided so as to face the inside of the base end portions of the side walls 5a and 5b thereof.
Reference numeral 6b denotes fulcrum recesses 7a and 7b on the left and right of the base end of the case body 3.
(7b is not shown) is engaged and opened and closed.

The tray portion 2 has a structure in which a concave surface portion 8 depressed into an area for accommodating the optical disk 15 and a disk clamp portion (disk holder) 9 for clamping the optical disk 15 are provided at the center position of the concave surface portion 8. There is.

The disc clamp portion 9 is provided with an optical disc 15
A base 10 formed of a pedestal which is formed one step higher than the concave surface 8 for accommodating therein, and a base 10 which stands on a circumference of a size substantially equal to the chucking hole 15a of the optical disk 15 in the center direction. The disc locking piece 11 is made up of a plurality of clamp claws, etc., which are independent of each other. Chucking hole 15a of optical disc 15
Is an opening for engaging with the drive unit of the recording / reproducing apparatus when recording / reproducing on / from the optical disc 15.
When the disk is stored in the storage case 1, the peripheral edge portion of the chucking hole 15a is engaged with the disk locking piece 11 of the disk clamp portion 9 provided in the tray portion 2, and the optical disk 15 is held.

In order to store the optical disc 15 in the recording medium storage case 1 having such a structure, first, the cover portion 4 is rotated and opened, the outer peripheral portion of the optical disc 15 is held by hand, and the chucking hole 15a is formed. Disc clamp part 9
The lower surface of the optical disk 15 lands on the base portion 10 by being fitted and pushed into the outside of the disk locking piece 11 provided on the chucking hole 15a due to its elastic deformation force. By abutting on the inner peripheral side surface portion, it can be held and stored in a frictional engagement manner.

As described above, in the storage case 1, the lower surface of the optical disk 15 to be stored lands on the base portion 10 and the recording surface thereof is held without contacting the concave surface portion 8 of the tray portion 2, thus damaging the recording surface. It is designed so that it does not exist.

On the contrary, the case 1 for storing the optical disk 15
When taking out from the disc, the cover portion 4 is rotated to open the lid, the outer peripheral portion of the optical disc 15 is held, and the top portion of the disc engaging portion 11 of the disc clamp portion 9 is pressed with a finger to disengage the disc engaging portion 11. The chucking hole 1 by transforming the inside
The engagement with the inner peripheral side surface portion of 5a is released, and the outer peripheral portion of the optical disc 15 is manually lifted up during this period to be removed from the tray portion 2.

[0009]

The conventional recording medium storage case described above is inconvenient for storage because it can store only one recording medium and is thick and requires a large storage space. There was such a problem. Therefore, two sheets are provided in the storage case having the same thickness as the conventional storage case (about 10 mm), or Japanese Patent No. 305112.
As announced in 6, the case that can accommodate 4 sheets has been proposed.

However, these recording medium storage cases do not largely deviate from the structure of the conventional case, and the recording medium or the contents recorded on the recording medium are entered or the recording medium itself is concerned. The so-called case card, which describes the description, can be seen from the outside of the storage case.
-PS), which has a relatively low impact strength. Therefore, when a case in which a plurality of recording media are stored is subjected to an impact such as a drop, the cover of the case is damaged, and in particular, the rotating fulcrum portion of the cover is easily broken.

That is, in the case of the conventional single-storing type case, the diameter represented by a CD is about 120 mm, and the thickness is about 1.2 m.
The weight of a case for storing a recording medium having a weight of approximately 17 g and a weight of approximately 17 g is approximately 75 g, whereas in the case for storing four CDs, the tray, lid, and the like that form the case are more compact than the storage space. The thickness of the parts is thin, and the weight is reduced to about 55 g to reduce the strength, and the total weight of the built-in recording medium is quadrupled to 68 g. That is, the weight ratio of contents to case is 1
In the case of a case of storing four CDs, the weight is 4.4 times (case weight / weight of recording medium = 75/17), whereas the case of storing four CDs is O. The problem was that it was as low as 81 (55/68), the case strength was greatly reduced, and that it was easily broken if dropped.

The present invention has been made in view of the above problems, and an object thereof is to store a storage case for storing a plurality of disc-shaped recording media, and a storage case for storing one conventional disc-shaped recording medium. Approximately the same external dimensions (14.5 cm (length) x 12.5 cm (width) x 1 cm for CD)
It is an object of the present invention to provide a recording medium storage case capable of obtaining a case strength capable of storing a plurality of sheets when formed in (thickness).

[0013]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and the invention according to claim 1 is a case body and a fulcrum portion formed at a base end portion of the case body. In a recording medium storage case including a cover which is rotatably attached to the case and which can be opened and closed, a fulcrum portion of the case body is formed on an elastically deformable tongue piece formed at a base end portion of the case body portion. It is characterized by

According to a second aspect of the present invention, in the first aspect, the tongue piece has an L-shaped cross section and is formed in a state of being separated from the bottom of the case body.

According to a third aspect of the present invention, a case body is provided.
In a recording medium storage case comprising a cover which is rotatably attached to a fulcrum formed at a base end of the case body and which can be opened and closed, in the cover, four sides of the cover are the four sides of the case body. It is formed so as to fit inside the side wall, and the front end of the cover has a height that allows the height of the front end of the surface of the cover when the lid is closed to match the height of the end face of the side wall of the case body. The case main body has a wall and a pedestal and a rib for aligning the height of the surface of the cover with the height of the end surface of the case main body side wall inside the rear side wall and the left and right side walls and around the disc storage area. The fulcrum portion of the case body is formed on an elastically deformable tongue piece formed at the base end portion of the case body.

According to a fourth aspect of the present invention, in the third aspect, the case body has an Izod strength of 5 kj /
The cover is made of a thermoplastic synthetic resin of M ^ or more, and the cover is made of a light-transmitting thermoplastic synthetic resin. The invention according to claim 5 is a recording medium storage case, comprising: a case body; and a cover that is rotatably attached to a fulcrum portion formed at a base end portion of the case body and is openable and closable. Are vertically symmetrical so that storage parts are formed on both sides thereof, and the cover is provided on both sides of the vertically symmetrical case body with the four sides of the cover closed. The disk holders are formed so as to fit inside the four side walls, and disk holders are formed at the central portions of both sides of the case body and the inner side surfaces of the covers, respectively, so that four disk-shaped recording media can be stored. Characteristic recording medium storage case.

[0017]

First Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view showing a closed state of a disk-shaped recording medium storage case according to the first embodiment, FIG. 2 is a perspective view showing an open state of the storage case, and FIG. 3 is a sectional view showing a first cover opening / closing behavior. 4, FIG. 4 is an enlarged perspective view of the disc holder, FIG. 5 is a sectional view of the optical disc storage lid, and FIG. 6 is an explanatory diagram of the storage case drop test method.

The first embodiment relates to a recording medium storage case that can store four CDs. This recording medium storage case 20
As shown in FIGS. 1 to 3, the body main body (case main body) 21 having storage portions on the front and back sides, and the base end sides thereof are rotatably supported by the base end 21 a of the body main body 21, The first cover 2 provided so as to be flush with the side wall end surface 29 of the body portion 21 when the lid body is closed.
2 and the second cover 23. Recording media (optical disks) to be housed in the front and back of the body main body 21 and in the center of the inner surfaces of the first and second covers 22 and 23, respectively.
The disc clamp portion 34 (34
a, 34b, etc.) are provided so that four CDs can be stored. The storage case 20 is configured to be symmetrical with respect to the top and bottom, and when the lid is closed, it is a thin rectangular box body as shown in FIG.

The first and second covers 22 and 23 are made of polystyrene (PS, GP-PS), high-impact polystyrene (HI-PS), acrylic styrene (A).
S), acrylic butyl nitric styrene (ABS), polypropylene (PP), polyethylene (PE), polycarbonate (PC) and other transparent resins made of a transparent thermoplastic resin are injection-molded. Further, the body main body 21 is manufactured by injection molding a resin having the Izod strength improved by adding synthetic rubber to the same thermoplastic resin as that used for the first and second covers 22 and 23.

Since the storage case 20 has a vertically symmetrical structure, the first cover 2 of the storage case 20 will be described below.
The two-side structure will be described in detail.

The first cover 22 is, as shown in FIG.
On the rear surface 47 of the base end portion of the cover 22, the side wall 2 of the body main body 21
A fulcrum convex portion 35 protruding from the inside of the base end portion of 7a, 27b
The fulcrum portions 44a and 44b having the fulcrum holes 45a and 45b engaging with the a and 35b are formed, and can be opened and closed with respect to the body main body 21. A front wall portion 41 is formed at the front end of the cover 22. The front wall portion 41 is shown in FIG.
As shown in FIG. 7, the front wall 42 that enters inside the front wall 25 of the body main body 21 and the body main body 21 at the upper end portion of the front wall
The front wall 42 is formed with a rib 43 that abuts on the inner side of the upper end of the front wall 25. When the front wall 42 is opened and closed, the front end of the front wall 42 contacts the front wall 25 of the body 21 to open and close. The front wall 42 of the cover 22 is formed to be retracted from the front wall 25 of the body main body 21 so as not to interfere with the body main body 21, and a finger-holding recess 42a is formed in the center thereof. Front wall 4 of the cover
The height of 2 is such that when the lid is closed, the tip 42b is the upper surface 31 of the body main body 21.
So that the height of the upper surface of the cover 22 is aligned with the upper end surface of the front wall 25 of the body main body 21.

Further, on the left and right end portions of the back surface of the cover 22,
Short side walls 48a and 48b are formed, and the outer surface thereof has an engagement protrusion 50 that engages with engagement grooves 51a and 51b formed in the side walls 27a and 27b of the body main body 21 when the lid is closed.
a and 50b (50b is not shown) are formed. A disc clamp portion 34b that engages with the chucking hole 15a of the optical disc 15 and holds the optical disc 15 on the lower surface side of the cover 22 is formed substantially in the center of the inside of the cover 22.

The body main body 21 has a case 20 on its four sides.
Side wall portions of the front and rear side walls (front wall, rear wall) 25, 2
Left and right side walls 27a, 27b facing each other
Are formed. And, inside the rear wall 26, the first
When the cover 22 is closed, the rear surface 4 of the base end of the cover 22
The base 33 for receiving 7 is formed at a height obtained by subtracting the thickness h2 of the cover 22 from the inner height h1 of the side wall 27,
The height of the upper surface of the closed first cover 22 and the height of the upper end of the side wall 27 are aligned. In order to prevent sink marks (molding distortion) in the thick portion, a concave portion 33a is formed on the surface of the base end rear surface stand portion 33 so as to be thin.

In addition, through holes 36a and 36b are provided in the vertical direction on both ends (both rear corners) of the base 33 of the body main body 21, and the first cover 22 is positioned inside the through holes 36a and 36b.
The fulcrum protrusions 35a and 35b that engage with the fulcrum holes 45a and 45 of the fulcrum portions 44a and 44b are formed on the rear inner surfaces of the side walls 27a and 27b. Further, inside the side walls 27a and 27b of the body main body 21, which face each other, the heights of the upper surface of the first cover 22 and the upper ends of the side walls 27a and 27b are aligned when the first cover 22 is closed. As described above, ribs 38a, 38a, 3 supporting the both end portions of the back surface of the first cover 22.
9b, 39b (38a, 39a are 38 on the side wall 27a side)
are formed at the same height as the base 33.

A disc clamp portion 34a for engaging the chucking hole 15b of the optical disc 15 to be held therein and holding the optical disc 15 on the body main body 21 is provided substantially at the center of the upper surface 31 of the body main body 21. Has been formed. Further, on the upper surface 31 of the body main body 21, four arc-shaped ribs 37 having a height that can secure a space in the thickness direction of the disc storage area 32 where the optical disc 15 held by the disc clamp portion 34a is located are formed. ing. The arcuate rib 37 receives an external force from the upper surface or the lower surface of the storage case 20 when the optical disk 15 is stored in the storage case 20 while being held by the disk clamp portion 34a and the first cover 22 is closed. In the thickness direction of the disc storage area 32, the first cover 22, the second cover 23 and the body main body 21 are not deformed even when the optical disc 15 is deformed. The optical disc 1 is for ensuring a space, and the optical disc 1 is accommodated by the external dimension accuracy of the optical disc 15 and thermal expansion.
Considering the diameter expansion of the optical disc 5, the optical disc 2 has a sufficient radius so that the outer peripheral side portion 15b of the optical disc 15 does not come into contact even when thermal expansion occurs, and the optical disc 2 has a radius larger than that of the optical disc 15.
It has been planted at a height high enough to accommodate 7. The height of the base 33 and the rib 38 is the same as the height of the arc-shaped rib 37.

Further, the side walls 27a and 27b of the body main body 21
In order to prevent the first cover 21 from being opened inadvertently when the case 20 is closed, the engaging projection 5 of the first cover 22 is provided.
Holes 51a and 51b with which 0a and 50b are engaged are formed.

Further, the side walls 27a, 27b of the body main body 21
Rough surface portions 48a and 48b are formed on the front portion of the outer surface of the body to prevent the fingers hung on the body main body 21 from slipping when the lid is opened (52b is on the side wall 27b).
Holding one rough surface portion 48a, 48b with one hand, the concave portion 42b on the front surface of the first cover 22 is put with the other hand.
The first cover 22 can be easily opened by pulling the first cover 22 and the first cover 22 up and down.

Disc clamp portions 34 (34a, 34b) formed on the body main body 21 and the first cover 22.
As shown in FIG. 4, it has three disc engaging upper pieces 55 and three arcuate chucking hole positioning pieces 59 located between the disc engaging upper pieces 55. The three disc engaging upper pieces 55 are erected on the inner surfaces of the body main body 21 and the first cover 22, and the circumscribed circle 56 connecting the three disc engaging upper pieces 55 is a chucking hole of the optical disc 15. It is formed so as to be slightly larger than the diameter of 15a and have a slight downward constriction. Therefore, the chucking holes 15a of the optical disc 15 are attached to the three disc engaging pieces 55.
When the disc is inserted, the three disc locking pieces 55 are pressed toward the inner center and the circumscribed circles 56 of the three disc engaging pieces 55 are inserted.
Is reduced in diameter, and the three disc engagement pieces 55 are the optical disc 1
The inner peripheral side 15b of the chucking hole 15a of No. 5 is held by frictional engagement.

The three chucking hole positioning pieces 59 have an arc shape, and the three disk engaging pieces 5 are provided.
It is planted and formed between 5. The chucking hole positioning piece 59 is the chucking hole positioning piece 5.
A circumscribing circle 60 connecting 9 is formed to be slightly smaller than the diameter of the chucking hole 15a of the optical disk 15.

The peripheral bottom portion 61 of the disc engaging piece 55 of the disc clamp portion 34 is formed thinner than the bottom portion 62 of the chucking hole positioning piece 59. Therefore, when the optical disc 15 is engaged with the disc engaging upper piece 55, the bottom portion of the disc engaging upper piece 55 is elastically deformed, so that the optical disc 15 is easily tilted, and is easily inserted when the chucking hole 15a of the optical disc 15 is inserted. Further, when the disc engagement piece 55 is contracted to the chucking hole 15a of the optical disc 15, the chucking hole 1
A large repulsive force is applied to the inner peripheral side portion 15b of No. 5, and the problem that the optical disc 15 is deformed is avoided.

The chucking hole positioning piece 59 is used when an unexpected problem occurs such that the optical disk 27 is mounted on the disk engaging piece 55, the storage case 20 is closed, and the side of the storage case is dropped. By receiving the inner peripheral side portion 15b of the chucking hole 15a, the disk engaging piece 55 of the clamp portion 34 is formed with a sufficient thickness to prevent it from being broken from the root.

Although three sets of the disc engagement pieces 55 and the chucking hole positioning pieces 59 are formed in the above description, the present invention is not limited to this, and it is possible to form an arbitrary plurality of sets such as two sets or four sets. Is.

When the optical disc 15 is attached to the disc clamp portion 34, the periphery of the disc clamp portion 34 is
In order to prevent the main surface of the optical disk 15 from rubbing against the disk storage area 32 of the body 21 or the first cover inner side 49 formed with the disk clamp portion 34, and thus preventing a print scratch, The base 63 is formed by a pedestal formed so as to be higher than the storage area 32 and the cover inner surface 49 so that the main surface of the storage unit 32 is stored away from the disk storage area 32 and the cover inner side 49. Since the disc clamp portion 34 is configured as described above, no through hole can be formed in the portion where the disc clamp portion 34 is installed. Therefore, even if the first cover 22 is formed with the disc clamp portion 34a, dust and the like will not enter.

The first cover 22 and the second cover 23 of the storage case 20 are made by the injection molding method using the thermoplastic resin having transparency as described above, and the body main body 2
1 is made by injection molding using a high-strength thermoplastic resin filled with synthetic rubber.

Although the configuration of the upper side of the storage case 20 has been described above, the configuration of the lower side of the storage case 20 is the same as the configuration of the upper side, and therefore the description thereof is omitted.

When the storage case 20 is closed, the first
The cover 22 and the second cover 23 are configured to fit in the body main body 21, and the front and rear walls 25 and 26 forming the body main body 21 and the side wall 2 facing each other.
The peripheral portions of the four sides are surrounded by 7a and 27b. Therefore, unlike the conventional storage case shown in FIG. 10, the corner portion of the cover is not exposed to the outside, and the body portion 2 made of a thermoplastic resin having synthetic rubber added to enhance Izod strength is used.
Since it is protected by No. 1, it is possible to construct the storage case with the cover made of transparent resin with high strength. Therefore, as shown in FIG. 5, a storage case 20 capable of storing a total of four optical disks 15 is formed on both sides of the body main body 21 and the inner surfaces of the first and second covers 22 and 23. The same thickness as the storage case can be configured.

Although the material example of the storage case 20 has been described above, the strength of the storage case 20 against a shock caused by dropping or the like depends on the material forming the body main body 21 constituting the storage case 20 due to its structure. .

Various changes in the strength of the body portion 21 constituting the storage case 20 were tested, and suitable materials were examined. The material strength is considered to be suitable for evaluating the damage due to the storage case 20 dropping, etc.
With the notched Izod strength defined by K7110 as an index, the Izod strength is 2 kj / M ^, 3.
kj / M ^, 4.3 kj / M ^, 52 kj / M ^, 7.
Inexpensive polystyrene (GP-
Using a resin prepared by adding synthetic rubber to PS) resin,
A first cover 22 and a second cover 22 obtained by injection-molding the body main body 21 of the storage case 20 and injection-molding the body main body 21 with transparent polystyrene (GP-PS) having an Izod strength of 2 kj / M ^. The body 23 of the body 20 of the storage case 20 in which the cover 23 has been incorporated is provided with two CDs each on the front and back main surfaces, and one each on the first cover 22 and the second cover 23, for a total of four CDs. The CD is mounted, the first cover 22 and the second cover 23 are closed, and the four ridges 65 to 68 as shown in FIG.
In order of drop height H = 30 mm, 40 cm, 50 cm,
A drop test was conducted by dropping the film from 60 cm on a wooden board 69 having a thickness of 30 mm and checking the damage condition.

[0039]

[Table 1]

Table 1 shows the result of damage to the body 21 of the storage case 20 by the drop test. As is clear from Table 1, the first cover 22 and the second cover 23 of the storage case 20 are the front and rear walls 2 that form the body main body 21.
5, 26 and side walls 27a, 27b facing each other
Has a cover structure in which the peripheral portion is surrounded by
If the Izod strength is less than 5 kj / M ^, the drop resistance strength is lower than that of a conventional storage case that stores one CD, and the Izod strength is 4.3 kj / M ^.
In the case of a product made of the above material, when it dropped on a wood board from a height of 60 cm, the collision part of the case 20 with the wood plate was damaged. On the other hand, when the material made of the material having an Izod strength of 52 kj / M ^ was dropped on the wood board from the heights of 50 cm and 60 cm, the collision part of the case 20 with the wood plate was only cracked. The result was.

[0041]

[Table 2]

Table 2 shows the first and second drop tests.
The result of the damage situation of the covers 22 and 23 is shown. As is clear from Table 2, the first obtained by injection molding with transparent polystyrene (GP-PS) having an Izod strength of 2 kj / M ^
The cover 22 and the second cover 23 were not cracked or damaged. That is, even if the body main body 21 has a low strength and the body main body 21 is damaged by being dropped, the storage case 20 does not cause damage to the first cover 22 and the second cover 23. It turns out that the protection performance of is high.

From the result of the drop test, the storage case 20 is made to have a conventional Izod strength of 5 kj / M ^ or more, preferably 75 kj / M ^ by the material of the body 21 of the storage case 20. Approximately the same external dimensions (145 cm) as a storage case that stores one CD.
It is possible to provide a disc-shaped recording medium storage case having strength similar to that of a conventional storage case for storing one CD even when it is formed in (vertical) × 125 cm (horizontal) × 1 cm (thickness). become.

As for the material of the storage case 20, the first cover 22 and the second cover 23 are transparent (light transmissive) from the viewpoint of the appearance factor or the design so that the inside of the storage case 20 can be seen. ) Is used, the body main body 21 is made of the same material as the main constituent material, such as polystyrene (PS, GP-PS) resin for the first cover 22 and the second cover 23. In order to improve the impact resistance of the polystyrene resin, the body body 21 is made of polystyrene (PS, GP-P).
S) Synthetic rubber is added to the resin to lose the light transmission,
Bi-impact styrene (Hi-Ps) resin is used to improve the Izod strength.

Similarly, the first cover 21 and the second cover 2
When a transparent acrylic styrene (AS) resin is used for 2, the body main body 23 has a synthetic rubber added to the acrylic styrene (AS) resin in order to improve the impact resistance of the acrylic styrene resin. If acrylic butyl nitrile styrene (ABS) with improved Izod strength is used, the first cover 22 and the second cover 23 can be recycled when the storage case 20 is recycled.
And the body main body 21 are decomposed and dissolved without separation, and polystyrene (PS, GP-PS) resin or synthetic rubber corresponding to the amount of acrylic styrene (AS) is added again to improve the Izod strength. Since it is possible to regenerate and reuse the retained high-impact styrene (Hi-Ps) resin and acryl butyl nitrile styrene (ABS), it is a preferable choice from the viewpoint of environmental protection.

Embodiment 2 Embodiment 2 of the present invention will be described with reference to FIGS. 7 and 8. 7 is a perspective view of a closed lid of a disk-shaped recording medium storage case showing the second embodiment, and FIG. 8 is a perspective view of the case, an enlarged perspective view and a sectional view of a cover engaging main part.

The second embodiment relates to a recording medium storage case that can store two CDs. This recording medium storage case 70
Is a body main body 71 having front and rear walls 73, 74 and left and right side walls 75a, 75b facing upward on four sides, and a body main body 71.
It is rotatably supported on the base end side of the body part 71 when the lid is closed.
And a cover 72 that fits inside the wall surface on four sides. The body main body 71 has an optical disk housing 77 formed in the center of the inner surface 76, and the upper surface 76 of the body main body 71 and the inner surface 80 of the cover 72 are substantially centered in the same manner as in FIG. Disc clamp parts 34a, 34
b is formed so that two optical disks can be stored. The storage case 70 is a thin rectangular box having a thickness of about half that of the conventional storage case when the lid is closed.

The body 71 is composed of side walls 73, 74 and 75.
A concave portion 73a is provided at the left and right center portions of the front wall 73 for facilitating a finger on the tip of the cover 72 when the lid is opened. Also, the cover 7 when the lid is closed
2 The height of the surface is set to the four side walls 73, 74, 7 of the body 71.
5a and 75b are aligned with the heights of the upper ends of the covers 72, and in order to prevent the cover 72 from bending inward, a base 40 for receiving the rear surface of the base of the cover 72 is formed inside the rear wall 74, and the left and right side walls 75a Ribs 41a, 41b, 42a, 42b for receiving the end portions on the side of the cover 72 are formed inside 75, 75b.

On the inner surface 76 of the body 71, a plurality of arcuate ribs 79 that form a disc storage area 78 of the body 71 are formed. Also, the body 71
The chucking hole 15a of the optical disk 15 is located approximately in the center of
A disc clamp portion 34a for engaging with is formed. The height of the arc-shaped rib 79 is sufficient to accommodate two optical discs 15 when the optical discs 15 are engaged with the body main body 71 and the disc clamp portions 34a and 34b of the cover 72.

As shown in FIG. 8, vertical through holes 86a and 86b are formed at both corners of the base of the body 71, and the rear wall 74 in contact with the through holes 86a and 86b. A fulcrum convex portion 91 serving as a fulcrum for opening and closing the cover 72 on the surface
elastically displaceable tongues 90a, 90b having a, 91b
Are formed.

The cover 72 is the rear surface 8 of the base end portion of the cover 72.
1, fulcrum holes 89a engaged with fulcrum protrusions 91a, 91b provided inside both ends of the base of the body 71,
Support plates 88a and 88b having 89b are formed, and the cover 72 can be opened and closed with respect to the body main body 21 with the fulcrum projections 91a and 91b of the body main body 71 as fulcrums.
Further, the body main body 7 is provided at the front end and the side end of the cover 72.
The first front wall 73 and the side walls 75a and 75b are located inside the front wall portion 82 and the side walls 85a and 85b. The front wall portion 82 is formed on the front wall 83 inside the front wall 73 of the body portion 71, and faces the inner upper end of the front wall 73 of the body portion 71 when the lid is closed. Rib 84
When the cover 72 is opened and closed, the front wall 83 is formed so that the front end of the front wall 83 is the front wall 73 of the body 71.
The front wall 83 of the cover 72 is formed to be retracted from the front wall 73 of the body main body 21 so as not to come into contact with and not interfere with the opening / closing lid.
Finger hooking recesses 83a are formed at the left and right center portions of the front wall 83 so as to be deeper on the upper side. And
A disc clamp portion 34b that engages with the chucking hole 15a of the optical disc 15 and holds the optical disc 15 on the body main body 21 is formed substantially at the center of the inner surface of the cover 22.

As described above, in the storage case 70, the cover 72 at the time of closing the lid has four side walls 73, 74, 7 of the body 71.
5a, 75b inside, the height of the upper surface of the body 71
Of the four side walls 73, 74, 75a, and 75b, and the fulcrum convex portion 91a on the side of the body 71 on which the fulcrum holes 89a and 89b of the cover 72 engage. 91b are formed on elastically displaceable tongues 90a, 90b formed on the base end of the body 71.

In the first embodiment, the storage case 20 is
As shown in Table 1, the drop height H = 30 cm, 40 cm,
As a result of performing a drop test to check the damage condition from 50 cm and 60 cm on a wooden board 69 having a thickness of 30 mm, the Izod strength is 3.5 kj / M ^ and 4.3 kj when dropped from a drop height of 60 cm. A fold occurred in the cover pivot fulcrums 25a and 25b formed on both sides of the base end of the body main body 23 made of a material of / M ^. Support point 88
Since the impact applied between the a and 88b and the fulcrum convex portions 91a and 91b is absorbed and mitigated by the elastically displaceable tongues 90a and 90b, the fulcrum portions 88a and 88b of the cover 72 are not broken. .

Incidentally, fulcrum projections 91a and 91b formed in the recesses 86a and b on both sides of the base end of the body 71,
Support holes 89a, 89b formed at the base end of the cover 72
The same effect can be obtained by reversing the relationship of the concavities and convexities.

Embodiment 3 Embodiment 3 will be described with reference to FIG. Figure 9
(A)-(d) shows the perspective view of a storage case, the expansion perspective view of the cover engagement part of the storage case, the top view / side view of the engagement part, and the cover opening / closing behavior sectional view.

In the third embodiment, the engaging portion A between the body 71 of the storage case 70 and the cover 72 in the second embodiment is attached.
The structure of is changed as shown in FIG. That is, the rear wall of the body 71 of the storage case 70 is replaced by the wide rear wall 74.
and the concave portion 8 having bottom portions 93 on both side corners.
6 (86a, 86b), the rear wall portion 7 of the body portion 71
A vertical cutout 95 and a horizontal cutout 96 are provided in a part of 4a.
To form a tongue piece 94 having an L-shaped cross section together with a part of the rear wall portion 74a, and the fulcrum portion 88 (88a, 88a, 88a of the cover 72 of the cover 72 is formed on the tongue piece 94.
The fulcrum convex part 92 engaging with the fulcrum hole 89 (89a, 89b) formed in 88b) was formed.

According to the third embodiment, since the tongue piece 94 is formed in an L-shaped cross section, the tongue piece 94 is easily elastically displaced in the front / rear and left / right directions. Further, by making the width of the notch 95 of the rear wall portion 74 wider than the thickness w of the fulcrum portion 88 of the cover 72,
As shown in FIG. 9D, the rotation range of the cover 72 can be opened 180 degrees from the closed state of the body 71, and the optical disc to be housed can be easily attached and detached. In the figure, 97 is a notch provided so that the fulcrum portion 88 of the cover 72 does not hit the rear wall 74c when the lid is closed.

In the third embodiment, the fulcrum convex portion 92 of the body main body 71, to which the fulcrum holes 89 formed in the fulcrum portions 88 facing each other on both sides of the base end portion of the cover 72 are fitted, is provided. Section L separated from bottom 93 of 71 and rear wall 74
Since the tongue piece 94 is formed, when the case 70 receives an unexpected impact such as a drop, the impact applied to the fulcrum convex portion 92 is dispersed by the elastic displacement of the tongue piece 94. The problem that 92 is broken will be avoided. Further, since the tongue piece 94 has an L-shaped cross section and is easily elastically displaced, the workability when the cover 76 is attached to the body main body 77 can be improved.

The structure of the engaging portion A in the second and third embodiments can be applied to the storage case capable of storing four recording media of the first embodiment.

[0060]

(1) According to the invention as set forth in claim 1, in a storage case configured to be openable and closable with an engaging portion formed by a cover at a base end portion of a case main body as a fulcrum,
Since the fulcrum of the case body is formed on the elastically deformable tongue formed on the base end of the case body, the impact applied to the fulcrum of the case body when the storage case is dropped due to an unexpected accident. Is relaxed by the elastically deformable tongue, so that the damage of the fulcrum portion, which is weak against impact, is reduced, and a storage case resistant to impact is obtained. (2) According to the invention of claim 2, in the storage case of claim 1, the tongue piece on which the fulcrum portion of the case body is formed has an L-shaped cross section and is formed in a free state from the bottom of the case body. Since the impact in the two directions applied to the fulcrum portion of the case body can be alleviated, the damage to the fulcrum portion, which is weak against the impact, can be further reduced, and a storage case that is stronger against the impact can be obtained. (3) According to the invention of claim 3, the cover of the storage case is formed so that the four sides of the cover fit inside the side walls of the four sides of the case body, and the cover is closed at the front end of the cover. Has a front wall having a height that allows the height of the front end of the cover to match the height of the end face of the side wall of the case body, and the case body is provided on the inner side of the rear side wall and the left and right side walls and the disc storage area. There is a pedestal and a rib around the periphery for aligning the height of the surface of the cover with the height of the end surface of the case body side wall, and the fulcrum portion of the case body is elastically deformable formed at the base end portion of the case body. Since it is formed on the tongue piece, the four sides of the cover are not exposed to the outside of the case body unlike the conventional storage case, and the corners of the cover that have a fulcrum fulcrum are attached to the side of the case body. Protected by 2 sides When the storage case is dropped due to an unexpected accident, damage to the rotating part of the storage case is reduced, the cover is opened inadvertently, and the recording medium stored inside the storage case is removed. It is possible to obtain a storage case with excellent storage item protection performance that does not fall off or scatter. (4) According to the invention of claim 4, in the storage case of claim 3, the case body has an Izod strength of 5 kj.
/ M ^ or more thermoplastic synthetic resin, the cover is
Since the cover is formed of a light-transmitting thermoplastic synthetic resin, the cover formed to fit inside the side wall of the case body is formed of a thermoplastic synthetic resin having an Izod strength of 5 kj / M ^ or more. Protected by a strong case body. Further, since the cover is made of the light-transmitting thermoplastic synthetic resin, the customers can confirm the recording medium stored from the outside of the cover, or the related common with the design of the stored recording medium. Even when using a low-priced resin that imparts a design property to the storage case, by forming the case body with a high-strength resin,
A high-strength storage case having a transparent cover can be obtained. Since the storage case has high strength, the storage case can be made thin. (5) According to the invention of claim 5, the case main body is formed in a vertically symmetrical manner so that the storage portions are formed on both sides,
The covers are respectively formed on both sides of the case body formed vertically symmetrically so that the four sides of the cover fit inside the side walls of the four sides of the case body when the lid is closed. Since the disk holders are formed at the central portions of the side surfaces, respectively, four recording media can be stored. The cover, which is easily damaged by impact, is protected by the case body, so a strong storage case can be obtained. for that reason,
The storage case can be made thin, and the storage case that can store four recording media can be configured to have the same thickness as a conventional one-storage-medium storage case.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view showing a closed state of a recording medium storage case according to a first embodiment of the invention.

FIG. 2 is a perspective view showing an opened state of the storage case.

FIG. 3 is a sectional view of the opening / closing behavior of the storage case first cover.

FIG. 4 is an enlarged view of a main part near a disc holding portion of a storage case.

FIG. 5 is a cross-sectional view showing a closed state of the optical disc storage lid of the storage case.

FIG. 6 is an explanatory diagram of a storage case drop test method.

FIG. 7 is a partially exploded perspective view showing an opened state of the recording medium storage case according to the second embodiment of the invention.

8A is a perspective view of the storage case with the lid open, FIG. 8B is an enlarged perspective view of a main part of the cover engagement, and FIG. 8C is a cross-sectional view of the main part.

9A is a perspective view of a storage case with the lid open, FIG. 9B is an enlarged perspective view of a cover engagement main part, FIG. 9C is a top view and a side view of the main part, and FIG. Sectional view of the opening and closing behavior of the cover.

FIG. 10 is an exploded perspective view showing a state where the recording medium storage case according to the conventional example is opened and partially disassembled.

[Explanation of symbols]

15 ... Optical disc 20 ... Case 21 ... Body body 22 ... 1st cover 23 ... 2nd cover 34 ... Disc clamp section 70 ... Storage case 71 ... Body part 72 ... first cover 72 ... second cover 88 ... fulcrum recesses 91, 92 ... fulcrum projections 90,94 ... Tongue

Claims (5)

[Claims] 1. A recording medium storage case comprising a case body and an openable / closable cover rotatably attached to a fulcrum portion formed at a base end portion of the case body. Is a resiliently deformable tongue formed on the base end of the case body. 2. The recording medium storage case according to claim 1, wherein the tongue piece has an L-shaped cross section and is formed in a state of being separated from the bottom of the case main body. 3. A recording medium storage case, comprising: a case body; and a cover portion rotatably attached to a fulcrum portion formed at a base end portion of the case body, the cover portion being openable and closable. Is formed so that the four sides of the cover fit inside the side walls of the four sides of the case body, and the front end of the cover has the height of the front end of the front surface of the cover when the lid is closed. The case main body has a front wall having a height that can match the height of the surface of the cover on the inner side of the rear side wall and the left and right side walls and around the disc storage area. A recording medium storage case, characterized in that the recording medium storage case has a base portion and a rib for aligning with . 4. The case body according to claim 3, wherein the case body is formed of a thermoplastic synthetic resin having an Izod strength of 5 kj / M ^ or more, and the cover is formed of a light-transmitting thermoplastic synthetic resin. A storage case for a recording medium characterized in that 5. A recording medium storage case comprising a case body and a cover which is rotatably attached to a fulcrum portion formed at a base end portion of the case body and is openable and closable. The cover is formed in a vertically symmetrical manner so that a storage portion is formed, and the cover is provided on both side surfaces of the vertically symmetrical case body portion, and when four sides of the cover are closed, side walls of the case body four sides. A disk holder is formed so as to fit inside each of the case main bodies, and disk holders are formed at the central portions of both sides of the case body and the inner side surfaces of the covers, respectively, so that four disk-shaped recording media can be stored. Medium storage case.