RU15049U1 - CASE FOR AUDIO CASSETTE - Google Patents

Description

The invention relates to the field of storage of household items in containers, cases, etc., in particular for storing audio tapes, especially audio tapes with unique recordings.

State of the art

A known case for an audio cassette comprising a housing with a rotatable cover (US 5205401, A 45 C 13/10, 04/27/93). Inside the case there is a lock by means of which the rotation cover is fixed. The lock is formed on the inner surface of the lid and contains many pins interacting with holes made inside the housing. A key hole is also made in the housing, which locks the lock and opens it.

The case allows you to exclude unauthorized access to the audio cassette and listen to the information recorded on it. However, the case does not exclude exposure to the cassette of electromagnetic fields, which can damage the recording until it is completely erased.

Also known is a case for audio cassettes containing several sections forming compartments for storing cassettes (US 4,519,655, A 47 B 81/06, 05/28/85). The front of the compartment closes the door. At the bottom of the compartment is installed a longitudinal rigid guide designed to support the cartridge. The door is pivotally attached to the lower front corners of the side walls of the compartment, the hinge being located between the front end of the rigid guide and the door and mounted above the hinge of the door with the side walls with the door open. A stop is located at the rear end of the rigid guide. When the door is rotated to the open position, the rigid guide extends forward by means of its articulation with the door. The stop contacts the cassette located on the rigid guide and pushes it through the open front of the compartment.

The presence in the case of several compartments provides storage of a multitude of cassettes, which allows you to create a selection of cassettes, for example on the subject, as well as cassettes that are constantly used, in particular for one-time recordings with subsequent rewriting. Therefore, it is not practical to store a cartridge with important information in such a case in view of its possible demagnetization (erasing).

Closest to the described is a case for audio cassettes containing a housing with walls (EP 0395974 A1, G 11 B 23/023, 11/7/90). The case is made of transparent material, which allows it to be used to demonstrate an audio cassette. For these purposes, the case has hinges that allow the case to rotate on a special rack for a comprehensive view of its contents. If necessary, several cases are placed on a rack, which provides information on cassettes with audio recordings of various contents.

Since the main purpose of cases for audio cassettes is to protect the cassette from destruction, pollution, and, therefore, to maintain sound recording integrity, the case of the case should be made of the material that most realizes this function.

All the known devices described above provide ease of use when removing the tape and when receiving information about the available audio recordings on it. These devices have sufficient rigidity, which has a positive effect on the storage conditions of audio cassettes in them. However, to ensure the mechanical integrity of the audio cassette, measures must be taken to eliminate distortion of the sound recording on the film under the influence of electromagnetic fields with different frequency ranges, especially electromagnetic microwave radiation, since the information carrier on the film is ferromagnetic particles. In addition, the implementation of the cases of the cases from conventional materials, such as plastics, does not allow you to quickly and unequivocally establish a correspondence between the uniqueness and rarity of the sound recording on the cassette tape and the case for its storage. The latter circumstance is especially important in the presence of a significant number of audio tapes stored on shelves or shelves.

Utility Model Essence

The objective of this utility model is to develop and create a case for an audio cassette with improved parameters.

the degree of protection of the sound recording from the negative effects of electric and electromagnetic fields, as well as a correspondence is achieved between the importance of the information contained in the film of the cassette and its storage location, which reduces the time required to search for the necessary recording.

These technical results are achieved by the fact that in the case for an audio cassette containing a case with walls, the case walls are made of platinum or gold, or silver, or their alloys, and the layer thickness of platinum or gold or silver or their alloys is selected from 0, 1 mm to 4 mm.

A distinctive feature of the described utility model is that the case walls are made of platinum or gold, or silver, or from their alloys, and the thickness of the layer of platinum or gold, or silver, or their alloys is selected from 0.1 mm to 4 mm.

The choice of platinum or gold, or silver, or their alloys as the wall material of the casing is due to the fact that these metals, due to their properties, effectively shield electromagnetic radiation. The choice of other materials as the wall material of the case body will not allow to fully obtain a positive effect, since only these materials are inert to all chemical elements. Indeed, when using iron or steel as a material for the wall of the casing, which shields electromagnetic radiation well, demagnetization of the audio recording is possible due to the fact that the metals that contain iron possess to some extent ferromagnetic properties. When used as a material, the walls of the casing of copper and its alloys, which also shield electromagnetic radiation, negatively affect the film of copper oxides formed when copper is combined with oxygen

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air. Therefore, only platinum or gold, or silver, or their alloys should be used for the manufacture of cases for audio cassettes, especially designed for long-term storage of the rarest and most important audio recordings. Obviously, in this case, the case with the outer surface of these noble metals or their alloys unambiguously assumes the presence in it of a cassette with a unique audio recording.

It should also be noted that when storing audio cassettes in metal cases over time, there is a significant loss in recording quality. It unexpectedly turned out that a case of the above noble materials significantly slows down the process of natural "aging of the cassettes

The choice of the range of thickness values of the layer of these metals is due to the following. If the wall thickness is less than 0.1 mm, the required stiffness of the case is not provided, i.e. its functional purpose related to the safety of the cartridge is not realized. With a wall thickness of more than 4 mm, the case is quite massive, which also excludes its functional purpose, due to ease of use.

In addition, the case can be equipped with a lid made of platinum or gold, or silver, or from their alloys.

List of drawings

In FIG. 1 shows a general view of a case for an audio cassette, and FIG. 2 shows a section AA in FIG. 1.

the case for an audio cassette contains a housing 1, the walls of which are made of platinum or gold, or silver or from their alloys. The internal dimensions of the housing 1, of course, must correspond to the standard dimensions of the produced audio cassettes. For complete isolation of the audio cassette, the case can be equipped with a cover 2 made of payable or gold, or silver, or from their alloys. The cover 2 is expediently located on the side of the flat face of the case. In this case, the cover 2 will replace the corresponding wall of the housing. Inside the housing 1, you can install elements 3 for fixing the audio cassette.

Structurally, in the described case any known solutions and improvements inherent in the cases can be applied.

from ordinary materials. The manufacture of cases with walls of precious metals is not difficult, since the technology for the production of products from them is well known and mastered. Thus, this useful model will increase the degree of protection of information stored on the cassette, as well as reduce the decline in recording quality over time and reduce the search time for the required record.

Claims (2)

1. A case for an audio cassette comprising a case with walls, characterized in that the case walls are made of platinum, or gold, or silver, or from their alloys, and the thickness of the layer of platinum, or gold, or silver, or their alloys is selected 0.1 - 4 mm. 2. A case for an audio cassette according to claim 1, characterized in that the housing is provided with a lid made of platinum, or gold, or silver, or from their alloys.