JPH05278780A - Case for disk cartridge - Google Patents

Abstract

PURPOSE:To form a bottomed hole which is deeper than the thickness of an external side wall part without reducing the strength of an internal side wall part by putting together a slit on the external side wall part and a recessed part on the internal side wall part. CONSTITUTION:A top plate member 1 and bottom plate member 2 which have side wall parts 11, 12, 17, 18, 19 for fastening on the three edges excepting the front side which become an opening are butted and joined to constitute a sleeve case. Then, slits 41, 42 are provided on the external side wall parts 17, 18, and a recessed 40 is provided on the internal side wall part, and the slits 41, 42 and recessed part 40 are put together to make a bottomed hole which becomes a fastening hole. Therefore, the side wall part on the internal side continues without processing a through part, and a sufficient mechanical strength is maintained. At the same time, since the thickness of each side wall part is shallower than the depth of the bottomed hole, the forming of the side wall parts does not become difficult.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge case for accommodating a disc cartridge constituted by accommodating a recording disc such as an optical disc or a magneto-optical disc.

[0002]

2. Description of the Related Art Heretofore, a so-called case has been used as a case for accommodating a disk cartridge constituted by accommodating a recording disc in a cartridge or a tape cassette constituted by accommodating a tape reel fitted with a recording tape in a cassette. Sleeve cases have been proposed.

In this sleeve case, a sheet material made of a synthetic resin material such as polypropylene (PP) or polyethylene terephthalate (PET) is bent and formed into a housing, and a bag-like structure having a slit-shaped opening on the front side. Is configured. That is, the disc cartridge and the like are inserted and housed in the sleeve case through the slit-shaped opening on the front side of the sleeve case.

[0004]

By the way, the above-mentioned disk cartridge case is stored in a storage rack configured so that a plurality of disk cartridge cases can be stored in the state where the above-mentioned disk cartridge is stored. May be done. This storage rack is formed in a housing-like shape like a bookshelf, and stores and supports a plurality of disk cartridge cases by sequentially arranging them in the thickness direction.

In such a storage rack,
In order to prevent the stored case for each disk cartridge from being accidentally dropped from the storage rack, it is conceivable to provide a structure for locking the case for each disk cartridge. That is, a bottomed hole or a through hole serving as an engagement hole is provided on the outer side surface of the disk cartridge case, and an engagement member that engages with the bottomed hole or the through hole is provided on the storage rack side. By engaging the mating member with the engaging hole, it is possible to prevent the disc cartridge case from falling off the storage rack. When the disc cartridge case is provided with a through hole and the disc cartridge is housed in the disc cartridge case, the disc cartridge must be in contact with the inner end of the through hole. Therefore, the through hole is a bottomed hole having the outer surface of the disk cartridge as the bottom.

However, since the disk cartridge case configured as the sleeve case as described above is formed by bending the sheet material, it has a sufficient thickness to form the bottomed hole. Can not do it. Even if the through hole is provided in the case for the disk cartridge, the depth of the through hole cannot be made deeper than the thickness of the material forming the case, so that the depth cannot be sufficient.

Here, the disc cartridge case is treated like the cartridge of the disc cartridge.
It is conceivable that a member forming the top plate side and a member forming the bottom plate side are butted and coupled to each other. In this case, since each of these members is integrally formed by means such as injection molding, there is no processing such as bending. Therefore, each of these members can be formed with a material having a sufficiently high rigidity and having an appropriate thickness.

However, in the case for a disc cartridge constructed by abutting and joining the member on the top plate side and the member on the bottom plate side, if the through hole is provided,
There is a possibility that so-called cracks are likely to occur around the through hole due to external force or the like. This is because the stress of the external force is concentrated on the peripheral portion of the through hole due to the existence of the through hole, and a so-called weld line easily occurs at the peripheral portion of the through hole during injection molding.

When the bottomed hole is provided in such a disc cartridge case, the thickness of the disc cartridge case must be larger than the depth of the bottomed hole. If the thickness of the disk cartridge case is increased, so-called sink marks are likely to occur during injection molding, and it becomes difficult to form the disk cartridge case with a predetermined shape accurately.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and is of a sufficient depth without complicating the manufacturing process and without impairing the mechanical strength and durability. It is an object of the present invention to provide a case for a disk cartridge in which an engaging hole for a disc is formed.

[0011]

In order to solve the above problems and achieve the above objects, a disk cartridge case according to the present invention is provided with a top plate portion, both side portions and a rear side portion of a lower surface portion of the top plate portion. A first member having a side wall portion projecting downward in a portion, a bottom plate portion having substantially the same shape as the top plate portion, and an upper side portion and a rear side portion of an upper surface portion of the bottom plate portion. And a side wall portion projecting toward the top plate, the side wall portion is overlapped with the side wall portion of the top plate member, and at least both side portions of the bottom plate portion are joined to both side portions of the top plate portion. A second member that forms a slit-shaped opening on the front side in cooperation with the top plate member by making a portion parallel to the top plate part, and among the side wall parts of these first or second members. The penetrating portion formed on the outer side wall portion and the side wall portion of the first or second member. And a recess formed on the outer surface of the side wall portion serving as a side-to-side, and the through portion and the concave portion, in which are overlapped with each other, by forming a bottomed hole.

[0012]

In the disk cartridge case according to the present invention, the side wall portion on the outer side of the side wall portion of the first member having the top plate portion and the side wall portion of the second member having the top plate portion is provided on the outer side wall portion. The formed penetrating portion and the concave portion formed on the outer side surface portion of the side wall portion on the inner side of each side wall portion are overlapped with each other to form a bottomed hole, so that the side wall portion on the inner side is formed. Sufficient mechanical strength is maintained by being continuous without a through-hole, and it is difficult to form these sidewalls because the thickness of each sidewall is smaller than the depth of the bottomed hole. There is no.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the disc cartridge case according to the present invention is a case for accommodating a disc cartridge 101 configured by accommodating a recording disc 117 such as an optical disc or a magneto-optical disc in a cartridge 102.

The disk cartridge 101 is shown in FIG.
As shown in FIG. 2, the upper and lower halves 103 and 104 are butted and joined to each other to form a thin casing, and the recording disk 117 rotatably accommodated in the cartridge 102. Has been done.

The recording disk 117 has a disk-shaped disk substrate made of a synthetic resin material, and a signal recording layer adhered and formed on the main surface of the disk substrate. The recording disk 117 has a chucking hole 114 formed in the central portion thereof, and a peripheral portion of the chucking hole 114 on one main surface portion of the disk substrate serves as a chucking reference surface portion 116. Has been done. A chucking plate 115 made of a metal material is attached to the other main surface portion of the disk substrate so as to close the chucking hole 114.

The cartridge 102 is constructed in the shape of a thin casing having a substantially rectangular main surface portion whose one side has a length substantially corresponding to the diameter of the recording disk 117. On the upper and lower main surface portions of the cartridge 102, a pair of substantially rectangular recording and reproducing openings 106 and 107 are formed at positions facing each other. The recording / reproducing opening 107 provided in the lower half 104 exposes a part of one main surface portion of the recording disk 117 to the outside along the inner and outer circumferences. The recording / reproducing opening 106 provided in the upper half 103 exposes a part of the other main surface portion of the recording disk 117 to the outside along the inner and outer circumferences.

Each of the recording / reproducing openings 106, 107
Can be opened and closed by a shutter member 105 slidably attached to the cartridge 102. The shutter member 105 is formed by bending a material such as a thin metal plate into a substantially U-shape and has a pair of shutter plate portions corresponding to the recording / reproducing openings 106 and 107. .. The shutter plate portions are arranged such that one end side portions thereof are connected to each other by the central portion of the shutter member 105 and are opposed to each other in parallel. The shutter member 105 has a central portion slidably supported on one side surface portion of the cartridge 102, and the shutter plate portions are arranged along the main surface portions of the cartridge 102. The shutter member 105 has the shutter plate portions and the recording / reproducing opening portions 106, 10
By setting the position corresponding to 7, the recording / reproducing openings 106 and 107 are closed. The shutter member 105 is, as shown by an arrow B in FIGS. 1 and 2,
The respective shutter plate portions are moved to the rear side on the main surface portion of the cartridge 102 by being slid to the rear side with respect to the inserting operation direction of the disc cartridge 101 into the recording / reproducing apparatus or the like indicated by the arrow A in FIG. The recording / reproducing openings 106 and 107 are opened.

Further, the cartridge 102 is provided with a circular chucking opening 108 at the central position of the lower main surface portion. This chucking opening 1
Reference numeral 08 exposes the chucking hole 114, the chucking reference surface portion 116, and the chucking plate 115 to the outside.

A pair of positioning holes 112 and 113 for positioning the cartridge 102 in the recording / reproducing apparatus are provided on the lower main surface of the cartridge 102. These positioning holes 112 and 113 are provided so as to be distributed near the front end portion and the rear end portion of the lower main surface portion of the cartridge 102.

Further, a pair of clamping recesses 110 and 109 are formed on the lower main surface of the cartridge 102.
Also, a disc type identifying recess 111 is provided.
These clamping recesses 110 and 109 are provided on the front side of the lower main surface portion of the cartridge 102 and distributed on both sides. These clamping recesses 11
0 and 109 are open to one side surface and the other side surface of the cartridge 102, respectively. The disc type identifying recess 111 is provided on the front side of the lower main surface portion of the cartridge 102. The disc type identifying recess 111 is opened to the front end surface of the cartridge 102. This disc identifying recess 111
In order to indicate the type of the recording disk 117, is formed to have one of a plurality of depths determined corresponding to the plurality of types.

The disc cartridge case according to the present invention, as shown in FIGS.
And a bottom plate member 2 which is a second member.
And is configured.

The top plate member 1 includes the cartridge 10
2 has a top plate portion 1a having a shape and size substantially corresponding to the shape and size of the main surface portion 2, and has a substantially flat plate shape and is integrally formed of a material such as a synthetic resin. ..
The top plate member 1 is made of, for example, a transparent material such as so-called acrylic resin (polymethylmethacrylate or the like), ABS resin, polycarbonate, polystyrene or the like.

As shown in FIG. 8, the top plate member 1 has a pair of inner side wall portions 11 and 12 on both sides of the lower surface portion which are parallel to the side edge portions of the top plate portion 1a. .. Further, the top plate member 1 has the top plate portion 1a on the rear side portion of the lower surface portion.
It has an inner rear wall portion 15 which is a side wall portion parallel to the rear edge portion. The inner side wall portions 11 and 12 and the inner rear wall portion 1
Numeral 5 is formed integrally with the top plate portion 1a and is continuous with each other to form a U-shaped peripheral wall excluding the front side.
The inner side wall portions 11 and 12 and the inner rear wall portion 15 are
The cartridge 102 has a height substantially equal to the thickness of the cartridge 102, and is projected. In addition, each of these inner side wall portions 11, 1
2 and the inner rear wall portion 15 are formed so as to be located inward from the both side edges and the rear edge portion of the top plate portion 1a by an amount corresponding to the thickness of each wall portion 11, 12, 15. ing.

8, 9, and 19 are formed on the outer side surface portions of the inner side wall portions 11 and 12 which are separated from each other.
Also, as shown in FIG. 20, side engaging protrusions 13 and 14 that serve as engaging protrusions are provided so as to protrude outwardly correspondingly. These side engaging protrusions 13 and 14 extend from the vicinity of the front end of each of the inner side wall portions 11 and 12 to the rear end side,
The top plate portion 1a is provided so as to extend in parallel to both side edge portions and project. These side engaging ridges 13 and 14 are slightly above the lower end portions of the inner side wall portions 11 and 12, that is,
It is formed so as to be located on the side closer to the top plate portion 1a. Further, a rear engagement protrusion 16 that serves as an engagement protrusion is provided on the outer side of the inner rear wall portion 15, that is, on the rear side surface portion so as to protrude rearward. This rear engagement ridge 16
Is from one side of the inner rear wall portion 15 to the other side thereof,
The top plate portion 1a is provided so as to extend in parallel to the rear side edge portion and project. The rear engagement protrusion 16 is provided on the inner rear wall portion 15
Is formed at a position slightly above the lower end of the above, that is, on the side closer to the top plate 1a.

On the outer side surfaces of the inner side wall portions 11 and 12, locking projections 23 and 24 are provided so as to project outward in a corresponding manner. These locking protrusions 23 and 24 are provided on the front side of the inner side wall portions 11 and 12 and adjacent to the upper surfaces of the side engaging protrusions 13 and 14, respectively. These locking projections 23, 24
Is formed to have a slightly smaller amount of protrusion than the side engaging protrusions 13 and 14. These locking projections 23, 2
4, the front end surface is substantially perpendicular to the inner side wall portions 11 and 12, and the rear end surface is the inner side wall portions 11 and 1.
The shape is inclined with respect to 2, and the amount of protrusion is gradually reduced toward the rear side.

Further, a pair of bottomed hole forming recesses 39 and 40, which are recesses forming the present invention, are provided at the rear side positions of the outer side surface portions of the inner side wall portions 11 and 12, respectively. As shown in FIG. 21, the bottomed hole forming recesses 39, 40 extend from the base end side to the lower end side of each of the inner side wall portions 11, 12, that is, from the bottom surface portion of the top plate portion 1a to each of the above. It is formed in a vertical groove shape over the vicinity of the lower end portions of the inner side wall portions 11 and 12.

On the lower surface of the top plate portion 1a, a pair of lateral step portions 48 and 49 and a rear step portion 50 which are bulged like steps are formed at both side positions and rear side positions. .. These step portions 48, 49, 50 are formed with a slight amount of bulge, and when the disc cartridge 101 is inserted into the disc cartridge case, the disc cartridge 101 serves as the top plate portion 1a. This is to prevent sliding contact with the central portion.

An upper cutout 5 is formed on the front end of the top plate 1a. The upper notch 5 is for exposing the rear end side portion of the disc cartridge 101 housed in the disc cartridge case to the outside.

On the other hand, the bottom plate member 2 has the bottom plate portion 1a.
Has a bottom plate portion 2b having substantially the same shape as that of the above, and has a substantially flat plate shape, and is integrally formed of a material such as a synthetic resin. The bottom plate member 2 is formed of a material having good heat resistance such as heat-resistant ABS resin and polycarbonate.

As shown in FIG. 7, the bottom plate member 2 has a pair of outer side wall portions 17 and 18 on both sides of the upper surface portion in parallel with the side edge portions of the bottom plate portion 2a. Further, the bottom plate member 2 has the bottom plate portion 2a at the rear side portion of the upper surface portion.
It has an outer rear wall portion 19 which is a side wall portion parallel to the rear edge portion. These outer side wall parts 17 and 18 and the outer rear wall part 1
9 are integrally formed with the bottom plate portion 2a and are connected to each other to form a U-shaped peripheral wall excluding the front side.
The inner side wall portions 22, 22 and the inner rear wall portion 25 are
The cartridge 102 has a height substantially equal to the thickness of the cartridge 102, and is projected. Further, each of these outer side wall portions 17, 1
8 and the outer rear wall portion 19 are formed along both side edge portions and the rear edge portion of the bottom plate portion 2a.

As shown in FIGS. 10, 17 and 18, side engaging grooves 20 and 21 are respectively formed on the inner side surface portions of the outer side wall portions 17 and 18 which face each other. Correspondingly, it is formed toward the inner side. The side engaging grooves 20 and 21 are provided in parallel with the upper surface portion of the bottom plate portion 2a from the vicinity of the front end portion of each of the outer side wall portions 17 and 18 to the rear end side. These side engaging grooves 2
0 and 21 are formed slightly above the base end portions of the outer side wall portions 17 and 18, that is, at positions slightly separated from the bottom plate portion 2a. These side engaging grooves 20, 21
The upper part of is an engaging protrusion. Further, the outer rear wall portion 1
On the inner side of 9, ie, the side surface on the front side, a flange portion 22 serving as a rear engagement protrusion is provided so as to protrude toward the front side. The flange portion 22 extends from one side of the outer rear wall portion 19 to the other side thereof, along the upper edge of the outer rear wall portion 19 and in parallel with the upper surface portion of the bottom plate portion 2a. It is set up. The lower side of the collar 22 and the bottom plate 2a are
It constitutes a rear engagement groove.

As shown in FIGS. 18 and 21, a pair of rib-shaped reinforcing portions 27 and 28, which are continuous with the collar portion 22, are provided at both ends of the collar portion 22. These reinforcing portions 27 and 28 are protrusions integrally formed on the inner surface portion of the outer rear wall portion 19, and each of the rib portions 2
2 is provided over the bottom plate portion 2a.

A plurality of reinforcing ribs 43 are provided on the lower side of the side engaging grooves 20 and 21 from the side surface of the side engaging grooves 20 and 21 to the bottom plate 2a. It is provided.

Further, locking recesses 25 and 26 are provided on the inner side surfaces of the outer side wall portions 17 and 18 so as to open inwardly correspondingly. These engaging recesses 25 and 26 correspond to the engaging protrusions 23 and 24,
It is provided at a position on the front side of each of the outer side wall portions 17 and 18 so as to communicate with the upper side of each of the side engaging grooves 20 and 21. These locking recesses 25 and 26 are provided in the side engaging grooves 2 described above.
It is formed to have a depth slightly shallower than 0 and 21.

Recesses 37 and 38 are formed on the upper edge sides of the outer side surface portions of the outer side wall portions 17 and 18, respectively. These recesses 37, 38 are formed in a step shape along the upper edge of each outer side wall portion 17, 18 from the front end portion to the rear end portion of each outer side wall portion 17, 18. These recesses 3
The upper side of 7, 38 is open to the upper edge side of each of the outer side wall portions 17, 18.

Further, a pair of bottomed holes, which are through-holes forming the present invention, are formed at the positions on the rear side of the respective outer side wall portions 17 and 18, corresponding to the respective bottomed hole forming recesses 39 and 40. The slits 41 and 42 are provided correspondingly. These bottomed hole forming slits 41 and 42 are, as shown in FIG.
The outer side wall portions 17 and 18 are formed in a notch shape from the upper end portion toward the base end side.

A lower cutout 6 is formed on the front end side of the bottom plate 2a. The lower notch 6 is for exposing the rear end side portion of the disc cartridge 101 housed in the disc cartridge case to the outside.

On the bottom plate portion 2a, a pair of lateral step portions 3 bulged in a step shape at both side positions and rear side positions.
0, 31 and a rear step portion 32 are formed. These step portions 30, 31, 32 are formed so as to have a slight bulge amount, and when the disc cartridge 101 is inserted into the disc cartridge case, the disc cartridge 101 is located at the center of the bottom plate portion 2a. This is to prevent sliding contact with the portion.

An erroneous insertion preventing projection 29 is provided on the rear step portion 32. The erroneous insertion prevention protrusion 29 is formed at a position slightly displaced to the one side from the central position of the rear portion of the bottom plate portion 2a, and is provided at a position corresponding to the disc identification concave portion 111 of the disc cartridge 101. Has been.

Then, the top plate member 1 and the bottom plate member 2 described above.
As shown in FIG. 11, each of the side engaging ridges 13, 1
4 engages with the respective side engaging grooves 20 and 21, and FIG.
As shown in FIG. 2, the rear engagement protrusion 16 is provided with the collar portion 22.
And the bottom plate portion 2a, that is, by fittingly engaging with the rear engagement groove, they are joined to each other. The top plate member 1 and the bottom plate member 2 are joined to each other by positioning the top plate member 1 on the front side of the bottom plate member 2 and arranging the side engaging projections 1 described above.
The rear end sides of the side engaging grooves 3 and 14 are inserted into the front sides of the side engaging grooves 20 and 21, and then the top plate member 1 is moved to the rear side so that the side engaging protrusions 13 and 14 is performed by sliding the inside of each of the side engaging grooves 20 and 21. When the top plate member 1 is slid to a position where the top plate portion 1a faces the bottom plate portion 2a, the rear engagement protrusion 16
Engages in the rear engagement groove, and the locking projections 23 and 24 fit into the locking recesses 25 and 26, respectively. When the locking projections 23, 24 are fitted into the locking recesses 25, 26, the locking projections 23, 24
24, first, enters between the outer side wall portions 17 and 18 from the front end side of the respective outer side wall portions 17 and 18, and pushes the outer side wall portions 17 and 18 outward so as to be slightly flexibly displaced. Next, when the outer side wall portions 17 and 18 are returned to the initial state when they reach the positions facing the locking recesses 25 and 26, they are fitted into the locking recesses 25 and 26.

Then, the top plate member 1 and the bottom plate member 2 are engaged with each other at both side portions and rear end side portions of the top plate portion 1a and the bottom plate portion 2a, respectively. The bottom plate portions 2a are parallel to each other, and a slit-shaped opening is formed on the front side. The slit-shaped opening has a length approximately corresponding to the length of one side of the cartridge 102, and a width approximately corresponding to the thickness of the cartridge 102. At this time, the lower ends of the inner side wall portions 11 and 12 and the inner rear wall portion 15 are in contact with the upper surface portion of the bottom plate portion 2a. The upper end portions of the outer side wall portions 17 and 18 and the outer rear wall portion 19 are in contact with the peripheral portion of the lower surface portion of the top plate portion 1a.

Further, the side groove portions 7 and 8 are formed by the recess portions 37 and 38 formed on the upper end sides of the outer side surface portions of the outer side wall portions 17 and 18 and the vicinity of both side edge portions of the top plate portion 1a. There is. That is, as shown in FIG. 11, the upper end edges of the outer side wall portions 17 and 18 are apart from the lateral side edge portions of the top plate portion 1a by a distance corresponding to the depth of the recesses 37 and 38. It is in contact with the inner side position. The side groove portions 7 and 8 are formed from the front end side to the rear end side of the side surface portion of the disk cartridge case.

These side groove portions 7 and 8 are support pieces that the storage rack has when the storage case is stored in a storage rack configured to store and support a plurality of storage cases. Is to be inserted. That is, this disc cartridge case is supported at a predetermined position by the storage rack through the support pieces by inserting the support pieces into the lateral groove portions 7 and 8 in the storage rack. It

At the rear side positions of the bottoms of the side groove portions 7 and 8, the bottomed hole forming slits 41 and 42 provided in the outer side wall portions 17 and 18 and the inner side wall portions 11 and 18, respectively.
The bottomed holes formed by overlapping the bottomed hole forming recesses 39 and 40 formed in 12 are respectively located.

In the storage rack, the bottomed hole is
The engaging member of the storage rack is fitted and engaged to lock the disk cartridge case. The bottomed hole has a depth sufficient for the engaging member to be fitted and engaged. As shown in FIG. 23, this bottomed hole has a depth indicated by an arrow G in FIG. 23, which corresponds to the sum of the thickness of the outer side wall portions 17 and 18 and the depth of the bottomed hole forming recesses 39 and 40. Have The depth of the bottomed hole is deeper than the thickness of the outer side wall portions 17 and 18, and deeper than the thickness of the inner side wall portions 11 and 12.

At a position on the inner side of the slit-shaped opening, that is, between the members 1 and 2, a pair of disc cartridges 101 inserted between the members 1 and 2 are locked. Lock members 9 and 10 are provided. These locking members 9 and 10 are made of polyacetal (P
As shown in FIGS. 13 to 16, the material to be held 44 on both ends is made of a flexible and elastic material such as OM).
45 and an elastic arm portion 46 that extends between the held portions 44, 45 and are integrally formed. Each of the held portions 44 and 45 is formed in a substantially columnar shape, and the axes thereof are parallel to each other. The elastic arm portion 46 is formed in a curved arm shape extending between the peripheral side surface portions of the held portions 44 and 45. The elastic arm portion 46 is curved and formed in a direction orthogonal to the axial center of each of the held portions 44 and 45, and the apex of the bulging portion formed by the bending is set to the held portions 44 and 45. On the other hand, the position is equidistant. This locking member 9,1
The bulging portion formed by the curve of 0 serves as a locking surface portion 47 for locking the disc cartridge 101.

Each of the lock members 9 and 10 has a pair of lock member mounting portions 33 and 34 formed on the bottom plate member 2.
Each of them is held and attached to. As shown in FIG. 17, the lock member mounting portions 33 and 34 are formed on the inner side portions of the outer side wall portions 17 and 18 which face each other, and are located on the rear side of the outer side wall portions 17 and 18. ing. The lock member attachments 33 and 34 have a pair of front and rear holding protrusions 54 and 55, respectively. The holding projections 54 and 55 are provided so as to project inward from the lower portions of the outer side wall portions 17 and 18, respectively, and are continuous with the bottom plate portion 2a. That is, these holding projections 5
4, 55 are provided at the corners between the outer side wall portions 17 and 18 and the bottom plate portion 2a. These holding protrusions 54,
55 are formed facing each other with a distance substantially corresponding to the lengths of the lock members 9 and 10. These holding projections 54, 55 are provided on the opposite sides of the holding recess 5
It has 2,53. These holding recesses 52 and 53 are
The recess is open to the upper side, and the cross-sectional shape thereof is an ellipse having a major axis in the front-rear direction or a part of an ellipse. The lock members 9 and 10 are held by the holding protrusions 54 and 55 by fitting the held portions 44 and 45 into the holding recesses 52 and 53, respectively.

The lock members 9 and 10 have the axes of the held portions 44 and 45 perpendicular to the bottom plate portion 2a, and the locking surface portions 47 are directed toward the inner side of the bottom plate portion 2a. ing. That is, the curved arm portions 46 of the lock members 9 and 10 are configured to bulge inward of the bottom plate portion 2a. And these lock members 9 and 10
Are the outer side wall portions 17 of the curved arm portions 46,
Elastic displacement in a direction approaching 18 is possible. When the bending arm portion 46 is elastically displaced in this manner, the held portions 44 and 45 are retained by the holding recesses 5 respectively.
It is moved in the front-back direction within 2, 53.

On the other hand, each of the inner side wall portions 11 and 12 of the top plate member 1 has a rear side portion cut out, and the rear side portion has a length corresponding to the width of each lock member 9 and 10. However, the hanging distance from the top plate portion 1a is shorter than that of the central portion and the front side portion. That is, the inner side wall portions 11 and 12 have the lock member holding portions 33 and 34, respectively.
The lock members 9 and 10 held by the lock member 9 and 10 are prevented from coming into contact with the lock members 9 and 10, and the lock members 9 and 10 are prevented from coming off from the lock member holding portions 33 and 34.

The lock member mounting portions 33 and 3 are provided.
A so-called sink mark is apt to occur when the bottom plate member 2 is integrally formed by injection molding on the back side of 4, that is, the rear side position on the outer side of each of the outer side wall portions 17 and 18.
In the sink mark, since the portions where the lock member attachment portions 33 and 34 are provided are thicker than the other portions of the outer side wall portions 17 and 18, the portions are inward in the cooling step during molding. It occurs when it collapses to the side. In order to prevent the occurrence of such sink marks, the positions corresponding to the lock member mounting portions 33, 34 of the outer side wall portions 17, 18 are provided with meat escape holes 35, 36 so that they are in a hollow state. There is.

To store and hold the disc cartridge 101 by the disc cartridge case according to the present invention having the above-described structure, the top plate portion 1a is used.
As shown by an arrow A in FIG. 1, the disc cartridge 101 is inserted from the front portion between the bottom plate portion 2a and the bottom plate portion 2a through the slit-shaped opening portion.

When the front portion of the disc cartridge 101 reaches the rear side of the disc cartridge case, both side surface portions of the front portion of the cartridge 102 are
The locking surface portions 47, 47 of the lock members 9, 10 are pressed to displace the curved arm portions 46, 46 in a direction of approaching the outer side wall portions 17, 18. And
When the front end of the cartridge 102 is inserted to a predetermined position where the front end of the cartridge 102 abuts the inner side wall 15 of the disk cartridge case, the locking members 9 and 10 correspond to the clamping recesses 110 and 109. To face each other. At this time, the curved arm portions 46, 46 of the lock members 9, 10 are returned to the initial state by the elastic force, and the locking surface portions 47, 47 are fitted into the clamping recesses 110, 109, respectively. .. As described above, the locking surface portions 47, 47 of the lock members 9, 10 are fitted into the clamping recesses 110, 109, respectively, so that the cartridge 102 is locked, and the cartridge 102 is locked on the rear side by impact or vibration. That is, the movement in the direction in which the disk cartridge case is pulled out to the outside through the slit-shaped opening is restricted.

At this time, the erroneous insertion preventing projection 29 is also provided.
Is fitted in the disc identifying recess 111 of the disc cartridge 101.

The disc cartridge 101, which is set at the predetermined position in the disc cartridge case as described above, is housed between the members 1 and 2 and protected by the members 1 and 2.

In the storage rack, the disk cartridge case is supported at a predetermined position through the side groove portions 7 and 8, and the engaging member is fitted and engaged in the bottomed hole. As a result, it is locked so as not to fall off the storage rack.

To take out the disc cartridge 101 housed in the disc cartridge case from the disc cartridge case, the cartridge 102 facing the outside through the upper and lower cutouts 5 and 6 is taken out. The rear portion of the disk cartridge is grasped with fingers and the like, and is pulled rearward with respect to the disk cartridge case.
Then, the lock members 9 and 10 are engaged with the locking surface portions 47 and 47 by the both side portions of the front portion of the cartridge 102.
Is pressed to displace the curved arm portions 46, 46 in a direction of approaching the outer side wall portions 17, 18 to unlock the cartridge 102. At this time, the disc cartridge 101 can be taken out from the disc cartridge case through the slit-shaped opening. And
When the cartridge 102 is further moved to the rear side, the lock members 9 and 10 are returned to the initial state, and the disc cartridge 101 is pulled out to the outer side of the disc cartridge case.

In the case for the disk cartridge according to the present invention, while the bottomed hole has a sufficient depth,
Since the side wall portions 11, 12, 17, 18 are made thinner than the thickness equal to the depth of the bottomed hole, the side wall portions 11, 12, 17, 18 generate so-called sink marks during injection molding. It is possible to easily form an accurate predetermined shape.

As shown in FIG. 24, in the case where the bottomed hole forming recesses 39, 40 are not formed in the inner side wall portions 11, 12, the depth of the bottomed holes is the outer side wall portion 1
The depth is equal to the thickness of 7, 18 and is not deep enough for the engagement member to be fitted and engaged.

In the case for the disk cartridge according to the present invention, the inner side wall portions 11 and 12 form a continuous peripheral wall while the bottomed hole has a sufficient depth. The mechanical strength of the side wall portions 11 and 12 is maintained, and the mechanical strength of the entire disk cartridge case is also maintained.

That is, as shown in FIG. 25, when the notch-shaped penetrating portion 40a is formed in the inner side wall portions 11 and 12, the depth of the bottomed hole is the outer side wall portion 1
The depth is equal to the sum of the thicknesses of 7, 18 and the inner side wall portions 11, 12, which is sufficient for the engagement member to be fitted and engaged. However, in this case, the inner side wall 1
Since No. 1 and No. 12 are divided at the above-mentioned penetrating portion 40a and do not form a continuous peripheral wall, the mechanical strength is reduced, and cracks are likely to occur on the base end side due to external force or the like.

[0061]

As described above, in the disk cartridge case according to the present invention, one of the side wall portion of the first member having the top plate portion and the side wall portion of the second member having the top plate portion is provided. The penetrating portion formed on the side wall portion on the outer side and the recess formed on the outer side surface portion of the side wall portion on the inner side of each side wall portion are overlapped with each other to form a bottomed hole.

Therefore, in this disc cartridge case, since the side wall portion on the inner side is continuous without a penetrating portion, sufficient mechanical strength is maintained. Further, in this disk cartridge case, since the thickness of each side wall portion is smaller than the depth of the bottomed hole, so-called sink marks are less likely to occur during injection molding of these side wall portions, and each side wall portion can be easily formed into a predetermined shape. Can be formed.

That is, the present invention provides a case for a disk cartridge in which an engaging hole having a sufficient depth is formed without complicating the manufacturing process and without impairing mechanical strength and durability. What can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a disc cartridge case according to the present invention and a disc cartridge housed in the disc cartridge case.

FIG. 2 is a perspective view showing the configuration of the disc cartridge as viewed from the bottom side.

FIG. 3 is a plan view showing a configuration of the disc cartridge case.

FIG. 4 is a rear view showing the configuration of the disc cartridge case.

FIG. 5 is a bottom view showing the configuration of the disc cartridge case.

FIG. 6 is a front view showing a configuration of the disc cartridge case.

FIG. 7 is an exploded perspective view showing a configuration of the disc cartridge case.

FIG. 8 is a perspective view showing the configuration of a top plate member that constitutes the disc cartridge case, as viewed from the bottom surface side.

FIG. 9 is a side view showing the configuration of the top plate member.

FIG. 10 is a side view showing a configuration of a bottom plate member that constitutes the disc cartridge case.

FIG. 11 is an enlarged cross-sectional view of a main part showing an engagement state between the top plate member and the bottom plate member in the side of the disk cartridge case.

FIG. 12 is an enlarged sectional view of an essential part showing a state of engagement between the top plate member and the bottom plate member on the rear side.

FIG. 13 is a front perspective view showing the shape of a lock member that constitutes the disk cartridge case.

FIG. 14 is a perspective view showing the shape of the lock member as seen from the back side.

FIG. 15 is a plan view showing the shape of the lock member.

FIG. 16 is a side view showing the shape of the lock member.

FIG. 17 is a plan view showing the shape of a bottom plate member that constitutes the disc cartridge case.

FIG. 18 is a front view showing the shape of the bottom plate member.

FIG. 19 is a front view showing the shape of a top plate member that constitutes the above-mentioned disc cartridge case.

FIG. 20 is a bottom view showing the shape of the top plate member.

FIG. 21 is an enlarged perspective view of an essential part showing the configuration of the essential part of the top plate member.

FIG. 22 is an enlarged perspective view of an essential part showing the configuration of the essential part of the bottom plate member.

FIG. 23 is an enlarged vertical sectional view of an essential part showing the configuration of a bottomed hole of the disk cartridge case.

FIG. 24 is an enlarged perspective view of an essential part showing the configuration of the essential part of the top plate member of the disc cartridge case to which the present invention is not applied.

FIG. 25 is an enlarged perspective view of a main part showing another example of the structure of the main part of the top plate member of the disc cartridge case to which the present invention is not applied.

[Explanation of symbols]

 1 --- ・ Top plate member 1a --- Top plate part 2 --- ・ Bottom plate member 2a ---・ ・ ・ Bottom plate part 11, 12 ・ ・ ・ ・ ・ Inner side wall part 15 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner rear wall part 17, 18 ・ ・ ・ ・ Outer side wall part 19 ········································································································ ..... Disc cartridges

Claims (1)

[Claims] 1. A first member having a top plate portion and side wall portions projecting downward at both side portions and a rear side portion of a lower surface portion of the top plate portion; and the top plate portion. It has a bottom plate part having substantially the same shape, and side wall parts projecting upward on both side parts and rear part of the upper surface part of the bottom plate part, and these side wall parts are the side wall parts of the top plate member. And at least both side portions of the bottom plate portion are joined to both side portions of the top plate portion, the bottom plate portion is parallel to the top plate portion, and the front plate member cooperates with the front plate member. A second member forming a slit-shaped opening on the side, a penetrating portion formed on the outer side wall of the side walls of the first or second member, and the first or second side A recess formed in the outer surface of the side wall on the inner side of the side wall of the member, wherein the penetrating portion and the recess are mutually Ne The combined, the case for disk cartridge obtained by forming a bottomed hole.