JPH065041A - Container made of resin - Google Patents

Abstract

PURPOSE:To provide a tape cassette, whose tape winding diameter is readily confirmed and appearance is excellent. CONSTITUTION:Tape-cassette halves 3a and 3b, which are the dichroic molded products of resin, have transparent windows 13 in opaque parts. Each transparent window 13 continues from the edge of one side wall 7 to the edge of a side wall 7 on the opposite side through a main plate part 4. Thus, a tape cassette 3 has the transparent windows 13 along the entire outer surface. A hub receiving part 16 in the transparent window 13 is opaque.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin container used as a tape cassette or the like.

[0002]

2. Description of the Related Art For example, in an audio cassette tape, as shown in FIG. 7, a magnetic tape 2 wound around a pair of rotatable hubs 1 is a cassette 3 which is a resin container.
It is stored inside. This tape cassette 3 is generally a cassette half 3a, which is a pair of box-shaped resin containers,
It is composed by combining 3b. This cassette half 3a,
In 3b, the side walls 5, 6 and 7 are bent substantially vertically in the same direction from each side of the rectangular main plate portion 4 which is the bottom wall. Also,
A bulging portion 8 is provided at the center of the front side of the main plate portion 4, and in the bulging portion 8, a front tooth portion (not shown) for pressing the exposed portion of the tape is provided on the front side wall 5. Further, in the central portion of the main plate portion 4, there are a pair of left and right hub receiving portions 10 for rotatably supporting the hub 1. Further, in the cassette tape, generally, the tape winding diameter can be seen through from the outside. Therefore, in the conventional tape cassette 3 shown in FIG. 7, the main plate portion 4 has a space between the hub receiving portions 10. A small transparent window 11 is provided at the position. However, with such a small transparent window 11, the visibility is poor and it is difficult to confirm the tape winding diameter. On the other hand, conventionally, there is also a tape cassette 3 which is made entirely transparent, but with this, it is not good to look at because it can see unnecessary things such as internal ribs and guide rollers. On the other hand, as shown in FIG. 8, conventionally, there is also a tape cassette 3 in which a large transparent window 12 including both hub receiving portions 10 is provided in the main plate portion 4. However, even with such a large size, the transparent window 12 provided only on the main plate portion 4
Then, it is difficult to see the tape winding diameter when viewed from an angle.

[0003]

As described above, in the conventional tape cassette, since the transparent window is provided only in the main plate portion, there is a problem that the visibility is poor and it is difficult to confirm the tape winding diameter. On the other hand, conventionally, there is a tape cassette which is made entirely transparent, but this has a problem in that it looks unnecessarily, such as internal ribs and guide rollers, which is not good to look at.

The present invention is intended to solve such a problem and has a novel design property, and when used in, for example, a tape cassette, the visibility of the tape winding diameter is maintained without deteriorating the appearance. It is an object of the present invention to provide a resin-made container capable of increasing the cost.

[0005]

The present invention is intended to achieve the above object, and the invention of claim 1 provides a resin container having a side wall bent from the periphery of the bottom wall to the same side.
In the opaque portion, there is a transparent portion that extends from the leading edge of the one side wall to the leading edge of the side wall that passes through the bottom wall and faces the one side wall, and has an island-shaped opaque portion in the transparent portion. is there.

The invention of claim 2 includes a pair of claims 1
The resin container described is butted against the tip edge of the side wall,
It has a transparent portion extending over both sides and extending over the entire circumference.

[0007]

In the resin container according to the invention of claim 1, in the opaque portion, a transparent portion which is substantially continuous from the leading edge of one side wall to the leading edge of the side wall facing the one side wall is provided. By providing an island-shaped opaque part in this transparent part, it has a novel and highly useful design.

Further, the resin container according to the invention of claim 2 is
A pair of the resin containers according to claim 1 are butted against each other at the leading edges of the side walls, and a transparent portion extending over the entire circumference is provided so as to provide a novel and highly useful design. is there. For example, when used as a tape cassette, the visibility of the tape winding diameter can be increased without deteriorating the appearance. Further, the island-shaped opaque portion can improve the design as a hub receiving portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the resin container of the present invention will be described below with reference to the drawings. The resin container of this embodiment is a tape cassette 3 used for a cassette tape as shown in FIG. 1 and a pair of cassette halves 3a and 3b constituting the tape cassette. The cassette tape shown in FIG. 1 has the same configuration as the cassette tape shown in FIGS. 7 and 8 described above, and therefore, corresponding parts will be denoted by the same reference numerals and description thereof will be omitted. In the cassette halves 3a and 3b shown in FIGS. 1 to 3, the transparent window 13 which is a transparent portion substantially penetrates the cassette halves 3a and 3b in the longitudinal direction. That is, the transparent window 13 is substantially continuous from the leading edge of the side wall 7 in the left-right direction to the leading edge of the side wall 7 that passes through the main plate portion 4 and faces the one side wall 7. Then, the pair of cassette halves 3a, 3b are connected to the side wall 5,
The tape cassette 3 which is abutted and joined at the leading edges of 6, 7 has a transparent window 13 which extends over the entire circumference and extends over both cassette halves 3a, 3b. Tape cassette 3, cassette half 3
Both side portions of the transparent window 13 in a and 3b are opaque portions. At the same time, the hub receiving portions 14 of the cassette halves 3a and 3b are also island-shaped opaque portions having the same color as the side portions of the transparent window 13. The hub receiving portion 14 is a transparent window.
A connecting portion 15 made of an opaque resin located on the back side of the transparent resin forming 13 is integrally connected to the opaque portions on both sides of the transparent window 13.

Next, an example of a mold used for two-color molding of the cassette halves 3a and 3b will be described with reference to FIGS. 4 and 5. This mold includes a fixed mold 21 and a movable mold 22 that move in the vertical direction in the drawing to open and close. Fixed type
Reference numeral 21 forms the outer surface of the box-shaped cassette halves 3a, 3b, and the movable die 22 forms the inner surface of the cassette halves 3a, 3b. The fixed mold 21 is a fixed mold body.
A movable cavity member 24 is incorporated in 23. On the other hand, in the movable die 22, a movable core member 26 is incorporated in a movable die body 25. The movable cavity member 24 moves up and down with respect to the fixed mold body 23 by driving a hydraulic cylinder device or the like, opens and closes with respect to the movable mold body 25, and among the cavities formed in the mold, the cassette half 3a, The portion of the main plate 4 of 3b corresponding to the transparent window 13 is closed. The movable core members 26 move up and down with respect to the movable mold main body 25 by driving a hydraulic cylinder device or the like, and open and close with respect to the movable cavity member 24 to form a cassette among the cavities formed in the mold. The portions corresponding to the transparent window 13 on both side walls 7 of the halves 3a and 3b are closed. And FIG.
As shown in (a) and FIG. 5 (a), the fixed mold 21 and the movable mold 22 are clamped, the movable cavity member 24 is butted against the movable mold body 25, and
A primary side cavity 27 is formed between the fixed die 21 and the movable die 22 with the movable core member 26 abutting against the 24.
After filling the secondary cavity 27 with the primary resin, as shown in FIG.
As shown in FIGS. 5B and 5B, the movable cavity member 24 is separated from the movable mold body 25, and the movable core member 26 is further separated from the movable cavity member 24, so that the fixed mold 21 and the movable mold 22 are separated from each other. The secondary side cavity 28 is formed between the primary side resin P1 and the primary side resin P1 solidified in the primary side cavity 27. Further, the fixed mold body 23,
A plurality of primary side gates 29 opening to the primary side cavity 27 and a secondary side gate 30 opening to the secondary side cavity 28 are formed. The primary side gate 29
Is a tunnel gate that opens from the sub-runner 31 formed between the fixed mold body 23 and the movable mold body 25 during mold clamping to a position corresponding to the front tooth portion 9, the side wall 6, or the side wall 7 of the side wall 5. . On the other hand, the secondary gate 30 also opens from the similar sub-runner 32 to a position corresponding to the transparent window 13 of the side wall 7.

Next, two-color molding using the mold will be described. When molding the tape cassette halves 3a and 3b, first, as shown in FIGS. 4 (a) and 5 (a),
The fixed die 21 and the movable die 22 are clamped, the movable cavity member 24 is abutted against the movable die body 25, and the movable core member 26 is abutted against the movable cavity member 24. In this state, the part of the secondary cavity 28 corresponding to the transparent window 13 is closed by the movable cavity member 24 and the movable core member 26, and the primary cavity 27 is formed between the fixed mold 21 and the movable mold 22. It Then, the opaque primary resin P1 is injected and filled from the primary gate 29 into the primary cavity 27.
The primary resin P1 flows into the portion of the primary cavity 27 corresponding to the hub receiving portion 14 via the portion corresponding to the connecting portion 15. In this way, the portions other than the transparent window 13 including the hub receiving portion 14 in the cassette halves 3a and 3b are molded. Then, after the primary side resin P1 filled in the primary side cavity 27 is solidified, as shown in FIGS. 4 (b) and 5 (b), the movable cavity member is movable with respect to the movable mold body 25.
24 is moved up by the thickness of the main plate portion 4 as shown by an arrow A, and the movable core member 26 is moved down by the height of the side wall 7 with respect to the movable cavity member 24 as shown by an arrow B. In this state, a secondary side cavity 28 in the shape of the transparent window 13 is formed between the fixed die 21, the movable die 22 and the primary side resin P1 solidified in the primary side cavity 27. Note that the pin 26 remains in contact with the fixed mold 21. Then, the transparent secondary resin P2 is injected and filled from the secondary gate 30 into the secondary cavity 28. This allows transparent windows
Mold 13. Then, after the secondary side resin P2 filled in the secondary side cavity 28 is solidified, the fixed die 21 and the movable die 22 are opened, and the formed tape cassette halves 3a, 3b are released. , Take it out.

In this way, two-color molding of the cassette halves 3a, 3b having the transparent window 13 extending from one side wall 7 to the other side wall 7 as shown in FIG. This allows
It is possible to obtain the tape cassette 3 having the transparent window 13 extending over substantially the entire circumference. In this way, the tape cassette 3 having the transparent window 13 extending over the entire circumference has excellent visibility of the tape winding diameter, and the tape winding diameter can be easily adjusted even in a dark place such as in a car or when viewed obliquely. And it can be surely confirmed. At the same time, unnecessary things such as internal ribs and guide rollers are not visible and it looks good. In addition, the opaque hub receiving portion 14
As a result, the hub 1, which impairs the appearance, is also hidden to some extent. Moreover, the design of the transparent window 13 and the hub receiving part 14 is novel,
High visual appeal.

FIG. 5 shows another embodiment of the present invention.
The cassette halves 3a and 3b of this embodiment are provided with two layers of an opaque primary resin P1 and a transparent secondary resin P2 on both sides of the transparent window 13.

The present invention is not limited to the above embodiment, and various modifications can be made. For example,
The structure of the mold for molding the two halves of the cassette halves 3a and 3b is not limited to that of the above embodiment. Further, in the above embodiment, the resin container is the cassette halves 3a, 3b for the audio cassette tape, but the present invention is applicable to the resin container for the magnetic recording medium other than the audio cassette tape, or another resin container. Can also be applied. For example, in the case of small items used for gifts, “HappyBirthday
!! "And" Congratulations! By forming the character "" as an island-shaped opaque part, it is possible to provide a small accessory case that has a novel design and is a fun gift to receive.

[0015]

The resin container according to the first aspect of the present invention has, in the opaque portion, a transparent portion that is substantially continuous from the leading edge of one side wall to the leading edge of the side wall that faces the one side wall through the bottom wall. At the same time, the transparent portion has an island-shaped opaque portion, which is novel and has high utility value.

Further, the resin container according to the invention of claim 2 is
A pair of resin containers according to claim 1 are butted against each other at the leading edges of the side walls, and a transparent portion is provided over the entire circumference extending over the both sides, which is a novel and highly useful design. For example, when used as a tape cassette, the visibility of the tape winding diameter can be improved without deteriorating the appearance, and the hub receiving part is an island-shaped opaque part, resulting in a novel and highly appealing design. Get even better.

[Brief description of drawings]

FIG. 1 is a perspective view of an entire cassette tape showing an embodiment of a resin container of the present invention.

FIG. 2 is a sectional view taken along the longitudinal direction of a tape cassette half that is the same as the resin container.

FIG. 3 is a sectional view of the same tape cassette half taken along the lateral direction.

FIG. 4 is a sectional view taken along the longitudinal direction of the cassette half showing an example of a two-color molding die of the same tape cassette half,
(A) shows the formation of the primary side cavity, and (b) shows the formation of the secondary side cavity.

5A and 5B are cross-sectional views of the same cassette half taken along the lateral direction, in which FIG. 5A shows the formation of the primary side cavity and FIG. 5B shows the formation of the secondary side cavity.

FIG. 6 is a partial sectional view of a cassette half showing another embodiment of the present invention.

FIG. 7 is a perspective view showing an example of a conventional cassette tape.

FIG. 8 is a perspective view showing another example of a conventional cassette tape.

[Explanation of symbols]

 3 Tape cassette (resin container) 3a, 3b Tape cassette half (resin container) 4 Main plate part (bottom wall) 5 Side wall 6 Side wall 7 Side wall 13 Transparent window (transparent part) 14 Hub receiving part (island opaque part)

Claims (2)

[Claims] 1. A resin container having a side wall that is bent from the periphery of the bottom wall to the same side, in the opaque portion, from the leading edge of the side wall to the leading edge of the side wall that penetrates the bottom wall and faces the one side wall. A resin container, which has a substantially continuous transparent portion and an island-shaped opaque portion in the transparent portion. 2. A resin container comprising a pair of resin containers according to claim 1 abutted against each other at a front edge of a side wall thereof, and having a transparent portion extending over substantially the entire circumference thereof.