JP3167533B2 - Storage case for cassette and its mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette storage case used for storing and storing a cassette or a cartridge containing a recording medium such as a tape or a disk, and a mold for molding the case.

[0002]

2. Description of the Related Art Conventionally, tape cassettes have been used in a storage case for handling such as sales and storage. The case is formed by attaching a lid to a rectangular case body containing a magnetic tape cassette with a hinge portion. In many cases, a transparent case that can be freely opened and closed with a front opening method is used, and an index card is inserted and used.

[0003]

In the conventional storage case, since the lid is in the front open state, the index card inserted into the case body is displaced together with the tape cassette when the tape cassette is taken out or taken out of the case. Then, it was pulled out of the case, and it was inconvenient and troublesome to handle and had a problem. Also, in the case, the molded product in which the index card insertion portion serves as a housing tends to shrink inward, and if a retaining rib having a vertical surface that contacts the index card is provided, the molded product is released from the mold. In addition, there are inconveniences that it is difficult to remove unless there are many protruding pins, and there are many traces remaining in the case when protruding with protruding pins, characters become invisible or blurred when it is on the insertion surface of the index In addition to this, there is a drawback that the appearance quality is impaired, and it is conceivable to add a taper to the retaining rib in consideration of releasability, but there is a problem because the stopper does not function as a card stopper. SUMMARY OF THE INVENTION The present invention is intended to eliminate these drawbacks that occur in handling and manufacturing in the related art, and to improve the mold release property while ensuring the function of a stopper for retaining an index card in a cassette storage case. It is an object of the present invention to provide a case capable of improving molding efficiency by improving the width and improving the appearance quality, and to provide a molding die thereof at low cost.

[0004]

According to the present invention, there is provided a transparent or translucent case body capable of accommodating a cassette, comprising a lid pivotally attached to a hinged portion so as to be openable and closable, and at least one of the upright walls of the case body. In the tape cassette storage case provided with the index card bent and provided along the part and the bottom surface, the case main body is provided with a stopper rib for preventing the index card from moving in the opening direction of the case. The stopper rib is provided so as to protrude along the opening edge, and the contact surface of the stopper card at the edge of the index card is formed of a vertical surface that is partially inclined, and at least a part of the upper surface of the vertical surface is peeled off. This corresponds to the projecting pin for the mold.

[0005]

[Action] When interpolating fit the index card 4 in the case body 1 of the storage case for the cassette, the rear piece 4 ₁ rear plate 1
Plugged hitting _one can close contact with the side plate 1 _2, the retaining engaged with the stopper rib 5 in the opposite direction. The magnetic tape cassette is placed in the case, and the cover 3 is closed over the case body 1 to be used. The index can be viewed vertically or horizontally in a standing or stacked state for storage. Can be. Further, if a finger is placed on the finger-holding surface portion of the lid 3 and lifted, the lid 3 is rotated around the hinge portion 2, deployed, and the lid 3 is opened. Next, the tape cassette A is pulled out of the case body 1 and used. Even if the index card 4 is displaced due to the pulling out of the cassette, the tape card A is caught and stopped by the stopper rib 5 and held in the case body 1. Safe in handling. Further, the contact surface of the stopper rib 5 at the edge of the index card is formed by a vertical surface 7 which is partially an inclined surface 6, and at least a part of the upper surface of the vertical surface 7 is formed by a projecting pin 8 for stripping. When the molded product is released from the mold, it can be removed easily without increasing the number of protruding pins, and the trace of the protruding pin only sticks to the upper surface of the stopper rib and is not on the insertion surface of the index. The characters do not become invisible or blurred, and the function of the stopper for the index card in the case is securely maintained. The quality can be improved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to an example of a storage case for an audio cassette shown in FIGS.
Is provided on a transparent or translucent case main body 1 capable of housing a lid 3, which is hinged so as to be openable and closable with a hinge portion 2, and is folded along at least a part of a vertical wall surface and a bottom surface of the case main body 1. In the tape cassette storage case provided with the index card 4, the stopper rib 5 for preventing the index card 4 from moving in the opening direction of the case is provided on the case main body 1 along the opening edge of the case main body 1. The stopper rib 5
The contact surface of the edge of the index card is formed by a vertical surface 7 which is partially an inclined surface 6, and at least a part of the upper surface of the vertical surface 7 is made to correspond to the projecting pin 8 for releasing. Things.

[0007] The case body 1 has a face plate 1 ₁ After standing on one edge of the rectangular bottom plate, and a stopper rib 5 which projects along the other edge or opening edge, rear face plate 1 ₁ side plates 1 ₂ lined on both sides of, 1 _2, a side plate 1 ₂ and the side ribs 5 ₁ which is provided continuously to the rear face plate 1 ₁ and the side 1 ₂ a top board 1 ₃ formed on the corner upper surface of, and a 1 _3.

The stopper ribs 5 are side ribs 5 ₁ , 5 ₁ erected on both sides of the case body _1.
The inclined surface 6 erected on the inner surface of the case main body 1 and provided on the inner surface of the stopper rib 5 is provided at the center of the vertical surface 7, and the abutting portions of the protruding pins 8 are formed at both side positions. Things.

Furthermore, the index card 4 is a card of L-shaped cross-section the Komenhen 4 ₁ to one end edge and folded erected bottom piece, the position of the trapezoidal portion width of the cassette head house to the bottom piece it is preferable to use those having a bending line section 4 _2.

FIGS. 5 and 6 show a molded article.
Of As, the stopper ribs 5 fixed die 9 ₁ and the movable mold 9 ₂ and the slide core 10 with the cavity for molding the case body 1 with a _first and tapered block 10 ₂
The mold is provided with a cavity formed by a vertical surface 7 in which the central portion of the inner surface of the stopper rib 5 is an inclined surface 6, and facing the upper surface of the vertical surface 7. The release pins 8, 8 for sliding release are slidably opposed to each other, and as shown in FIGS. 8. Eject and release easily with 8 to improve the molding efficiency by greatly improving the mold releasability while ensuring the function of the stopper for the index card in the case, and improve the appearance quality. Can be fulfilled.

Further, the case body 1 and the lid 3 are provided with engaging concave / convex portions constituting a locking locking portion at least at a relative position of the side plate having the hinge portion 2. Although one or more locking portions are provided at contact portions between the case body 1 and the lid 3, they may be provided at opposing positions. It is good to equip it inside the case so that the lock is accurate at the position. The case body 1 and the lid 3 are formed with a concave portion 11 on the hinge portion 2 side for fitting a trapezoidal portion of the head house of the tape cassette, and further provided with a rib (not shown) for holding the cassette. It may be provided on the inner surface and provided with a rotation preventing projection (not shown) on the lid 3 side to be inserted into the hub hole.

[0012]

According to the present invention, a transparent or translucent case body capable of housing a cassette is provided with a lid which is pivotally opened and closed with a hinge, and at least a part of an upright wall and a bottom surface of the case body. In a tape cassette storage case equipped with an index card folded inside according to
A stopper rib for preventing the index card from moving in the opening direction of the case is provided on the case main body so as to protrude along the opening edge of the case main body, and a contact surface of the stopper rib with the index card edge is provided. Is formed by a vertical surface that is partially inclined, and at least a part of the upper surface of the vertical surface is made to correspond to a protruding pin for releasing, so that the index card in the case is also stable. In addition to being able to handle the inside and out of the tape cassette well, the appearance is good and the product value can be greatly improved, and even if the tape cassette is pulled out from the storage case, the index card does not come out of the case body, Molded products from molding dies, which make handling easy, do not stain or damage the index card By improving the removal, the production efficiency can be greatly increased, the function of preventing the index card from falling off can be reliably demonstrated, the ejection work at the time of releasing the mold can be performed in a well-balanced manner, and there is no protrusion mark visible. Can be used without any trouble, and it can also contribute to the improvement of appearance quality. In addition, there is a practical effect that the molding die can be manufactured simply and at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view of a separated state showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a part of the case main body in the example of FIG.

FIG. 3 is a plan view of the case main body in the example of FIG. 1;

FIG. 4 is a plan view cut along line AA of FIG. 3;

5 is a longitudinal sectional view at the time of molding along the line BB in FIG. 3;

FIG. 6 is a longitudinal sectional view taken along line CC of FIG. 5;

7 is an enlarged vertical cross-sectional view of a part of the example of the example of FIG. 6 in a mold release operation state, where (a) is at the end of injection molding, (b) is at the time of opening the mold, and (c) is the product release. Indicates time.

[Explanation of symbols]

A Tape cassette 1 Case main body 1 ₁ Rear panel 1 ₂ Side panel 1 ₃ Top panel 2 Hinge section 3 Lid 4 Index card 4 ₁ Rear panel 4 ₂ Fold curve section 5 Stopper rib 5 ₁ Side rib 6 Inclined surface 7 Vertical surface 8 Projection Pin 9 ₁ Fixed side mold 9 ₂ Movable side mold 10 ₁ Slide core 10 ₂ Tapered block

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Chotaro Kozu 1-1-13 Nihonbashi, Chuo-ku, Tokyo Inside TDK Corporation (72) Inventor Akio Momoi 1-13-1 Nihonbashi, Chuo-ku, Tokyo Inside IDK Corporation (56) References JP-A 4-27784 (JP, U) JP-A 4-118386 (JP, U) JP-A 3-77615 (JP, U) JP-A 60-175082 (JP) , U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65D 85/575 B29C 45/34

Claims (4)

(57) [Claims] 1. A transparent or translucent case body 1 capable of accommodating a cassette A, comprising a lid 3 pivotally attached to a hinged portion 2 so as to be openable and closable. And a stopper rib 5 for preventing the index card 4 from moving in the opening direction of the case is provided on the case main body 1 in the tape cassette storage case provided with the index card 4 folded inside. 1, the stopper rib 5 is formed with a vertical surface 7 which is a part of an inclined surface 6, and the contact surface of the stopper rib 5 with the edge of the index card is formed. A cassette storage case, wherein at least a part of the upper surface is made to correspond to a release pin 8. Is wherein said stopper ribs 5, for the case cassette according to claim 1, characterized in that erected continuous with the side ribs 5 _1, 5 ₁ erected on the inner surface of the case body 1 on both sides of the main body 1 Storage case. 3. The inclined surface 6 is provided at a central portion of the vertical surface 7, and contact portions of the projecting pins 8 are formed at both side positions.
Or the storage case for cassettes described in 2. Wherein the face plate 1 ₁ After standing on one edge of the rectangular bottom plate having a stopper rib 5 which projects along the other edge, side plates lined on both sides of the rear surface plate 1 ₁ 1 ₂ , 1 ₂ and
The side ribs 5 ₁ which is provided continuously to the side surface plate 1 _2, the rear face plate 1 ₁
And top board 1 ₃ provided in the corner upper surface of the side plate 1 ₂
A fixed side mold 9 ₁ and the movable mold 9 ₂ Case body 1 with a cavity for molding comprising a slide core 10
In ₁ and molding die consisting of tapered block 10 ₂ which comprises a cavity formed in the vertical plane 7 the inner surface central portion of the stopper rib 5 in the die is an inclined surface 6, said vertical face 7,7 A mold for a cassette storage case, characterized in that release pins 8, 8 are slidably opposed to each other, facing the upper surface of the cassette.