JPH10258890A - Tape cassette storage case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the bonding force with a case body without changing the thickness in the height direction of a cushioning material which is an insert parts by providing a detachment preventive means on the side of the cushioning material to absorb the impact on the inside of the case to store a cassette. SOLUTION: An inside plate 27 and an outside plate 28 having a space part 26 for hollow structure are connected to each other like bottom cushioning parts 22, 23, 24, 25, and an upper part is opened in a triangular shape, and a cushioning material 29A which is an insert parts through insert molding is embedded therein. The side of the cushioning material 29A is an inclined surface 29b expanded downwardly. Because the cushioning material 29A is formed in a state where the resin is attached to the side inclined surface 29b, the cushioning material is not easily pulled out upwardly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tape cassette storage case, and more particularly to a cassette storage case provided with a cushioning member for absorbing an impact due to a drop of the case.

[0002]

2. Description of the Related Art A conventional tape cassette storage case is used for storing and storing a video tape cassette used in a broadcasting station when not in use.

In recent years, in this type of tape cassette storage case, as shown in FIG. 3, a bottom plate 13 and a ceiling plate 30 are formed into a hollow structure by blow molding in order to protect the stored video cassette from an impact such as dropping. An impact member is provided for absorbing the impact when the case falls or the like. This impact member is the most effective position for protecting the stored cassette, namely, the four corners of the bottom plate 13 and the cassette support projections 17a and 17b which are in direct contact with the reel which also serves to prevent the rotation of the reel of the cassette. It has a structure arranged around.

As shown in FIG. 3, a tape cassette storage case provided with such a cushioning member has a square main body 10 for mounting and holding a tape cassette (not shown). The cover body 11 is composed of a cover 11 that can be opened and closed in a one-sided manner, and a spine cover 12 having a predetermined width between the case body 10 and the cover 11, and is integrally formed of a synthetic resin such as polypropylene. .

The case body 10 includes a bottom plate 13 having a hollow structure capable of mounting and holding a tape cassette (not shown), and left and right walls integrally formed on the bottom plate 13 at three ends other than the spine 12 in an upright state. Boards 14, 15 and front wall board 16
And cassette support projections 17a and 17b for positioning the tape cassette (not shown) in the case body 10 and preventing the reel from rotating, and storing the tape cassette at the center of the end of the bottom plate 13 on the spine section 12 side. And an erroneous storage preventing rib 20 for restricting the direction.

Around the base side of the cassette supporting projections 17a and 17b, there are provided reel cushioning portions 18 and 19 in which cushioning members, for example, rubber elastic members are disposed with a predetermined width. . By providing such a cushioning member, when the case falls or the like occurs, the impact force applied to the projecting portion that directly contacts the reel of the cassette is absorbed.

[0007] The right wall plate 15 is formed to be thinner at an intermediate portion than the left wall plate 14, and the front wall plate 16 has a case body 1.
In this configuration, a rectangular lock member 21 that locks the cover 11 when the lid 11 is closed is provided.

At four locations at each corner of the bottom plate 13, a bottom plate buffer portion 2 having a hollow member embedded with a buffer member.
2, 23, 24 and 25 are provided.

Bottom plate buffer 22 (23, 24, 25)
As shown in FIG. 3B, an inner plate 27 and an outer plate 28 having a hollow space 26 are connected to each other and formed in a substantially triangular cylindrical shape with an open upper portion, and insert molding is performed therein. Thereby, a buffer member 29 of another component, for example, a rubber elastic member is embedded.

On the other hand, as shown in FIG. 3A, the lid portion 11 is formed in substantially the same shape as the case body portion 10 and has a substantially rectangular ceiling plate 30 formed in a hollow, and
Left and right wall plates 31 and 32 and a front wall plate 33 which are integrally formed by being connected to the ends of three sides other than the spine 12 in an upright state;
A rectangular flat plate-shaped side plate 34 protruding from the upper part of the right wall plate 32, an inner pocket portion 35 provided at one corner of the inner surface of the ceiling plate 30, and a ceiling plate buffer provided at four corners of the inner surface of the ceiling plate 30 It is composed of parts 36, 37, 38 and 39. The side plate 34 is guided outside the thin right wall plate 15 of the case main body 10 when closing the lid 11, and serves for positioning and guiding the entire lid 11.

The inner pocket portion 35 is a pocket capable of storing the recording card 40, and has a structure in which a transparent plastic sheet having a non-equilateral square shape as a whole in plan view is attached to the ceiling plate 30 by heat welding to form a pocket. I have.

Each of the ceiling plate buffer portions 36, 37, 38, 39 is provided at a position facing each of the bottom plate buffer portions 22, 23, 24, 25 of the case body 10 when the lid portion 11 is closed. As shown in FIG. 3 (B), like the bottom plate buffer 22, the ceiling plate buffers (36, 37, 38) 39 include an inner plate 27 and an outer plate 28 having a hollow space 26. Are connected to each other and the upper part is opened to form a substantially triangular cylindrical shape, and a buffer member 29, which is an insert part by insert molding, for example, a rubber elastic member is embedded therein. The side surface of the buffer member 29 is formed as a vertical surface 29c with respect to the upper surface.

In the case having such a structure,
When the cassette is stored in the case main body 10 and the lid 11 is closed, the four bottom plate buffering parts 22, 23,
24, 25, and four ceiling plate buffer portions 36, 3 of the lid portion 11.
7, 38, and 39, the four corners of the tape cassette housed in the vertical direction are interposed between the four corners to absorb the shock in the vertical direction and to engage with the reel.
The horizontal shock applied to the case is absorbed by the reel buffering portions 18 and 19 provided around the a and 17b.

FIG. 4 shows a procedure for insert-molding the cushioning member 29. First, as shown in FIG. 4A, dies 50 and 51 are prepared. The mold 50 has a square pin 52 for positioning the buffer member 29. The buffer member 29 is attached to the square pin 52, and the softened resin 53 is injected into a tubular shape from a gate called a die.

Next, as shown in FIG. 4 (B), the dies 50 and 51 to which the insert parts 29 are attached are closed, and the dies 5 are closed.
Air is injected at a high pressure from the air injection nozzle
A resin is attached to the 0, 51 and the insert part 29 to form a shape.

Next, as shown in FIG. 4 (C), after cooling, the molds 50 and 51 are opened to take out the molded product, and the surroundings are subjected to a burr treatment to complete it.

As shown in FIG. 5, when the insert part 53 is mounted on the mold 50, a square pin 52 is set up on an insert part mounting portion 54 provided on the mold 50, 53 is provided with a hole 55 into which the square pin 52 is inserted. And this square pin 52
Is inserted into the hole 55 of the insert part 53 and attached for positioning. Further, the insert part 53 has a structure in which a mating portion 56 for securely connecting to the molded product is provided.

FIG. 6 shows another structure for attaching the insert part to the mold. The concave part 58 for positioning the cylindrical pin 57 and the insert part 53 in the mold 50 is shown. The insert component 53 is provided with a hole 55 into which the cylindrical pin 57 of the mold 50 is inserted. Then, this cylindrical pin 57 is inserted into the insert part 5.
3 and is positioned and attached by the engaging portion 58. The insert part 53 also has a structure in which a mating portion 56 for securely connecting to the molded product is provided.

[0019]

However, the cushioning member, which is an insert component provided in the hollow, has a small space between the hollows, so that a meshing portion cannot be provided in the buffering member. Therefore, after insert molding, there is a problem that the shock-absorbing member easily comes off due to a drop impact of the case or the like.

It is also possible to reduce the thickness of the cushioning member as an insert part in the height direction, but in this case, there is a problem that the shock buffering effect is reduced.

Therefore, there is a problem to be solved in that the coupling force with the case body is increased without changing the thickness of the cushioning member as an insert part in the height direction to enhance the function of preventing detachment.

[0022]

In order to solve the above-mentioned problems, a tape cassette storage case according to the present invention is formed by insert-molding a shock-absorbing member, which is an insert part for absorbing a shock, on an inner surface of a case for storing a cassette. In this case, a separation preventing means is provided on a side surface of the cushioning member.

By providing the detachment preventing means on the side surface of the insert part, the insert part is not easily detached after insert molding without changing the thickness in the height direction of the insert part. Will be strong.

[0024]

Next, an embodiment of a tape cassette storage case according to the present invention will be described with reference to the drawings. In order to facilitate understanding, the same parts as those in the prior art will be described with the same reference numerals.

As shown in FIG. 1, the tape cassette storage case according to the present invention has a square main body 10 for mounting and holding a tape cassette (not shown).
And a lid 1 that can be opened and closed in a single-sided manner in the case body 10.
1 and a spine cover part 12 having a predetermined width between the case body part 10 and the lid part 11, and the whole is integrally formed of a synthetic resin such as polypropylene.

The overall appearance of the case body 10, spine 12 and lid 11 constituting this case is substantially the same as the structure described in the prior art. A detailed description thereof will be omitted, and a description will be given of a cushioning member having a detachment preventing means, which is a main part of the present invention, and insert molding of an insert part.

First, the bottom plate 13 of the case body 10 and the ceiling plate 30 of the lid 11 have a hollow structure by blow molding in order to protect a tape cassette (not shown) from shock or vibration when the cassette is stored. The impact member that absorbs the impact when the case falls etc. is in the most effective position to protect the stored cassette, that is, directly contacts the reel that also serves to prevent the reel of the cassette from rotating. A structure is provided around the cassette support protrusions 17a and 17b, four corners of the bottom plate 13 and near four corners of the ceiling plate 30.

Around the base side of the cassette supporting projections 17a, 17b, there are provided reel cushioning portions 18, 19 in which cushioning members, for example, rubber elastic members are disposed with a predetermined width. . By providing such a cushioning member, when the case falls or the like occurs, the impact force applied to the projecting portion that directly contacts the reel of the cassette is absorbed.

At the four corners of each corner of the bottom plate 13 formed in the case main body 10, bottom plate buffer portions 22, 23, 24 and 25 are provided in which a buffer member is embedded in a hollow portion. I have.

The bottom plate buffer 22 (23, 24, 2)
5), as shown in FIG. 1 (B), a hollow space 2 having a hollow structure.
6 is formed in a substantially triangular cylindrical shape having an upper portion opened by connecting the inner plate 27 and the outer plate 28, and a buffer member 29A of another component, for example, a rubber elastic member is embedded therein by insert molding. It has a structure.

The cushioning member 29A is formed in a trapezoidal shape whose base portion is widened, and the side surface has an inclined surface 29b widened in the base direction, that is, a structure in which the creepage distance is long.
Such a cushioning member is attached by insert molding. This will be described later.

On the other hand, at the four corners of each corner of the ceiling plate 30 formed on the lid 11, ceiling plate buffer portions 36, 37, 38, and 39 are provided in which buffer members are embedded in hollow portions. It has become.

The ceiling plate cushions 36, 37, 38, 39
Are provided at positions facing the bottom plate buffering portions 22, 23, 24, and 25 of the case main body 10 when the lid portion 11 is closed. As shown in FIG. 1B, the bottom plate buffering portions 22, 23 are provided. ,
As in the case of 24 and 25, the inner plate 27 and the outer plate 28 each having the hollow space 26 are connected to each other, the upper portion is opened to form a substantially triangular cylindrical shape, and a buffer, which is an insert component formed by insert molding, is formed therein. The structure is such that a member 29A, for example, an elastic member made of rubber is embedded. This buffer member 2
The side surface of 9A has an inclined surface 29b in which the lower direction is widened, that is, a structure in which the creepage distance is increased.

When the cassette is stored in the case body 10 and the lid 11 is closed, the four bottom plate buffers 22, 23, 24, 2 of the case body 10 are formed.
5 and four ceiling plate buffer portions 36, 37, 3 of the lid portion 11.
8 and 39, a reel buffer 18 provided around the protrusion engaged with the reel by absorbing the vertical impact by sandwiching the four corners of the stored cassette from above and below. 19 absorbs the horizontal shock applied to the case.

Now, the cushioning member 29 provided with the separation preventing means is provided.
A is formed in a trapezoidal shape in which the base direction is widened, and its side surface is an inclined surface 29b, which is incorporated into the case by insert molding.

FIG. 2 shows a buffer member 2 as an insert part.
This shows the procedure for insert molding 9A. First, as shown in FIG. 2A, molds 50 and 51 are prepared. Then, the softened resin is formed into a tube from a gate called a die and injected. Then, the insert part 29A is attached to the mold 50, and the mold is closed.

Next, as shown in FIG.
Air is injected at a high pressure from the air injection nozzle 54 of the mold 5.
The resin adheres to the inclined surfaces 29b of the insert parts 29A and the insert parts 29A.

Next, as shown in FIG. 2 (C), after cooling, the molds 50 and 51 are opened to take out the molded product, and the surroundings are subjected to a burr treatment to complete.

In this manner, the insert part 29A, which is a trapezoidal cushioning member, is formed.
Is formed in a state in which the resin is stuck to the resin, so that the resin cannot be easily removed upward.

This structure is not limited to the inclined surface 29b, and may have a structure in which a side surface of the cushioning member is provided with a detachment preventing function.
For example, the shape may be a curved surface or a wavy shape. By forming the creepage distance of the side surface long, a detachment prevention function is provided.

[0041]

As described above, the tape cassette accommodating case according to the present invention has a detachment preventing means provided on the side surface of the cushioning member, which is an insert part, so as to increase the coupling force with the case after insert molding. It is possible,
Excellent shock absorbing power can be maintained.

[Brief description of the drawings]

FIG. 1A is an overall perspective view of a cassette storage case according to the present invention, and FIG. 1B is a sectional view taken along line AA or line BB.

FIG. 2 shows a procedure of insert molding the insert part.

FIG. 3A is a perspective view showing a tape cassette storage case according to the related art, and FIG. 3B is a perspective view of FIG.
It is a sectional view taken on line -C or DD.

FIG. 4 shows a procedure for insert molding an insert part according to the prior art.

FIG. 5 is an explanatory view showing the shape of a general insert part.

FIG. 6 is an explanatory view showing the shape of a general insert part.

[Explanation of symbols]

10; case body, 11; lid, 12; no spine, 1
3; bottom plate, 14; left wall plate, 15; front wall plate, 16; right wall plate, 17a; cassette support protrusion, 17b; cassette support protrusion, 18; reel buffer, 19; reel buffer,
Reference numeral 20: erroneous storage prevention rib, 21; lock member, 22; bottom plate buffer, 23; bottom plate buffer, 24; bottom plate buffer, 2
5; bottom plate buffer, 26; space, 27; inner plate, 28;
Outer plate, 29; cushioning member (insert part), 29A;
Cushioning parts (insert parts), 30; ceiling board, 31; left wall board, 32; front wall board, 33; right wall board, 34;
5; inner pocket portion, 36; ceiling plate buffer portion, 37; ceiling plate buffer portion, 38; ceiling plate buffer portion, 39; ceiling plate buffer portion, 4
0; recording card, 50; mold, 51; mold, 52; pin, 53; resin, 54; mounting portion, 55; hole, 56;

Claims (3)

[Claims] 1. A case in which a shock-absorbing member, which is an insert part for absorbing an impact, is insert-molded and incorporated into an inner surface of a case for accommodating a cassette. And a tape cassette storage case. 2. The tape cassette storage case according to claim 1, wherein the separation preventing means provided on the side surface of the buffer member has a longer creepage distance on the side surface of the buffer member. 3. The tape cassette storage case according to claim 1, wherein the detachment preventing means provided on the side surface of the buffer member is an inclined surface whose side surface is widened in a base direction.