JPH0357132Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention mainly relates to the case of packing cassette tapes, video tapes, etc.

[Conventional technology]

Conventionally, for example, a bottom plate is connected to the lower edge of the back plate via a bendable part, and a lid plate is connected to the upper edge of the back plate via a bendable part, and the inner surface of the bottom plate is formed by press-drawing a synthetic resin material. The dish-shaped case body is placed on the inner surface of the lid plate, and the dish-shaped lid frame body formed by press-drawing a synthetic resin material is placed and fixed on the inner surface of the lid plate. A case having a structure that is welded to the inner surface of the plate was devised by the inventor of this paper and is known in Japanese Utility Model Publication No. 38534/1983.

[Problem that the invention attempts to solve]

However, with this structure, there is no special reinforcement between the edges facing the bendable part and the inner edges of the bottom frame and lid frame in the bottom plate and lid plate, so there is no need to forcefully open or close the lid. There have been problems in that the bottom frame body and the lid frame body may not fit together smoothly because this part may become distorted due to impact caused by careless removal of the case.

[Means for solving problems]

The present invention consists of a bottom frame body and a lid frame body which are made by compressing a single hard synthetic resin plate and are placed opposite each other with a connecting part of a required width interposed therebetween, and which can be fitted to each other, and the inside of the bottom frame body and the lid frame body. A bending line formed between the edge and the connecting part, a narrow sloped part formed between the inner edge of the bottom frame and the lid frame and the line, and a large number of bending lines formed at narrow intervals on the sloped part. A narrow sloped part, a large number of recesses provided at narrow intervals on the sloped part, and the entire outer surface of the bottom frame, the connecting part and the lid frame, and the entire periphery of the bottom frame, the connecting part and a soft synthetic resin outer sheet sewn to the outer periphery of the lid frame and the outer sheets of the bottom frame, connecting portion and lid frame, and at locations corresponding to the above-mentioned lines. The present invention attempts to solve these problems by providing a case made of a hard core plate formed with similar bending lines.

〔Example〕

The embodiment shown in the figure includes a bottom frame body 2 and a lid frame body 3 which are formed by compressing a single hard synthetic resin plate and are arranged oppositely with a connecting part 1 of a required width interposed therebetween, and which can be fitted to each other, and these bottom frames. Between the creases 4, 4' for bending which have a V-shaped cross section between the body 2, the lid frame 3 and the connecting part 1, and the creases 4, 4' and the inner edges of the bottom frame 2 and lid frame 3. The formed narrow inclined part 5, the plurality of recesses 6 provided at narrow intervals in the inclined part 5, and the entire outer surfaces of the bottom frame 2, the connecting part 1, and the lid frame 3. A single soft synthetic resin outer sheet 7 whose periphery is welded to the outer periphery of the bottom frame 2, the connecting part 1, and the lid frame 3, and the outer surface of the bottom frame 2, the connecting part 1, and the lid frame 3. Similar bending lines 8, 8 are interposed between the sheet 7 and corresponding to the bending lines 4, 4' between the bottom frame 2, the lid frame 3, and the connecting portion 1 on the outside. This figure shows a case for a videotape pack, which is composed of a hard core plate 9 formed with .

In the figure, reference numerals 10 and 10' indicate a locking protrusion and a locking recess.

[Functions and effects of the invention]

Since the present invention is as described above, it goes without saying that the bottom frame and the lid frame can be fitted together to store necessary items such as cassette tapes and video tapes inside. In the present invention, a narrow slope is formed between the inner edges and the grooves of the bottom frame and the lid frame, and a number of recesses are formed at narrow intervals on this slope. Not only is the space between the edge facing the bendable part of the plate and the inner edges of the bottom frame body and the lid frame body particularly reinforced, but also the inclined part itself is reinforced by the numerous recesses formed in this inclined part. However, this invention prevents the bottom frame and the lid frame from becoming distorted due to the forceful opening and closing of the lid or the shock caused by carelessly dropping the case. This has the effect of sufficiently solving the above-mentioned problems such as the possibility that the fitting may not proceed smoothly.

[Brief explanation of drawings]

The figures show an embodiment of the case of the present invention, in which Figure 1 is a perspective view of the whole, Figure 2 is an exploded perspective view of the whole, and Figure 3 is a main part taken along line A-A in Figure 1. It is an enlarged cross-sectional view. 1... Connecting portion, 2... Bottom frame body, 3... Lid frame body,
4, 4'...Stripe, 5...Slanted part, 6...Concave part,
7... Outer sheet, 8, 8'... Lines, 9... Hard core plate, 10... Locking protrusion, 10'... Locking recess.

Claims (1)

[Scope of utility model registration request] A bottom frame and a lid frame that can be fitted to each other are connected to the inner edges of the bottom frame and the lid frame, which are pressed out of a single hard synthetic resin plate and placed opposite each other with a connecting part of the required width interposed therebetween. The bending lines formed between the parts, the narrow sloped parts formed between the inner edges of the bottom frame body and the lid frame body, and the grooves, and the sloped parts are provided with up to a large number of pieces at narrow intervals. a soft synthetic resin outer sheet disposed over the entire outer surface of the bottom frame, the connecting portion, and the lid frame, the entire periphery of which is welded to the outer periphery of the bottom frame, the connecting portion, and the lid frame; A case consisting of a hard core plate interposed between the bottom frame, the connecting portion, and the outer sheet of the lid frame, and having similar bending lines formed at locations corresponding to the above-mentioned lines.