The invention relates to an attachable spectacle case for spectacles or sun glasses.

Spectacle cases are often designed to receive the entire frame of the glasses. Although, on the one hand, enclosing the entire frame by the spectacle case provides good protection for them, on the other hand, it limits their portability.

Ordinary spectacle cases, which enclose the entire frame, are generally massive, made of non-deformable materials, making it difficult to carry in clothing. For this reason, most people do not keep their glasses in such spectacle cases, but carry them in their pockets, such as the breast pocket, or just leave them in handy places when they are not needed.

In the most common cases, glasses are lost, their lenses may be scratched or covered with dust when left uncovered, or glasses can easily break when they are falling, so there is a need to achieve a simple, light, flexible spectacle case with a reduced volume.

Several types of spectacle cases are known which have various advantages as well as disadvantages and which are disclosed in patents and patent applications EP2976961 A1 , JP4011034B2, US4290522, WO2011095864A2.

The purpose of the present invention is to provide a lightweight, flexible and low volume spectacle case, capable of protecting the glasses and their lenses against pressure and abrasion.

The advantages of the spectacle case according to the invention are as follows: the same design of spectacle case can be used for different types of glasses; it can be made of both deformable materials and rigid materials and it is small enough to be inserted, attached to the glasses, into the classical spectacle cases.

According to the invention, the spectacle case is made of a body of sufficiently rigid material such as natural or synthetic leather or plastic combined or not with textile materials, the body of material having a front rectangular side and a rectangular rear side, separated by means of a rectangular central surface and folding to one another after folding lines, the front face being provided with a trapezoidal prism having a base with an isosceles trapezoid shape and being symmetrically disposed to the edge of the front side, on this prism being also placed one of the components of the closure of the spectacle case, the other closing part of the spectacle case being mounted directly on the rear side, and the two sides are folded one over the other having the trapezoidal prism between them.

According to the invention, the spectacle case has the advantage of a reduced volume and increased flexibility, and it can be stored in any pocket, at neck or hip or in any bag without any inconvenience, protecting the glasses against pressure and abrasion. Also, the spectacle case according to the invention is attached very simply to the glasses, can be used for glasses of different sizes and is very cheap to produce.

The following are some examples of embodiments of the invention in connection with Figures 1-19, which are:

- Fig. 1 , overview of the spectacle case in the open position

- Fig. 2 shows an unfolded view of the spectacle case;

- Fig. 3, a view of how the spectacle case attaches to the glasses;

- Fig. 4 is a view of the spectacle case with the glasses inserted inside and the temples folded outwards;

- Fig. 5, a top view of the spectacle case with the glasses inserted inside;

- Fig. 6 is a view of how the spectacle case is attached to the glasses in a reversed position;

- Fig. 7, view of the spectacle case with the glasses being inserted reversed inside and with the temples unfolded

- Fig. 8, top view of the spectacle case with the glasses inserted reversed inside;

- Fig. 9, top view of a curved spectacle case with the glasses inserted inside;

- Fig. 10, view of a spectacle case with a magnetic closing device

- Fig. 11 , a view of a spectacle case with a Velcro fastener

- Fig. 12 is a view of a spectacle case whose trapezoidal prism has a rounded top side

- Fig. 13, a view of a spectacle case whose trapezoidal prism has an empty interior without having a front side

- Fig. 14 is a view of how to use the empty space of the prism of the spectacle case

- Fig. 15, spectacle case with protective pockets for the bottom of the lens - Fig. 16, spectacle case whose rear side is provided with openings to allow the nose pads to stand outwardly

- Fig. 17, a top view of a spectacle case whose rear side is provided with openings for the nose pads to stand outwardly

- Fig. 18, a view of a prism free spectacle case, provided on the rear side with openings for the nose pads to be able to stand outwardly

- Fig.19 is a view of a prism free spectacle case, provided on the rear side with openings so that the nose pads can stand outwardly and the temples are folded outwards

The spectacle case according to the invention as shown in figure 1 is made of a body of material 1, which may be a material of a certain degree of stiffness but which also retains a certain flexibility such as natural skin or synthetics, appropriately processed paper or fabric or plastic. The body 1 can also be made of combinations of the materials listed above and may include metal or composite inserts if it is desired to obtain superior stiffness or flexibility.

The material body 1 has a rectangular front side a and a rectangular rear side b, which may have rounded corners separated by a rectangular central surface c and which folds one to the other by d and e fold lines. If less rigid material is used, fold lines d and e, as well as the edges of the faces a and b can be stiffened by hems and stitches.

The front side a is provided with a trapezoidal prism 2. This is a straight prism symmetrically disposed at the bottom of the anterior side a and has two identical parallel sides having the shape of an isosceles trapezoid, one of which is attached by gluing or other process of the front side or may be an integral part of it. The symmetry axis of the trapezoidal side of the prism coincides with the symmetry axis a and b of the sides of the spectacle case - figure 2.The dimensions of the trapezoidal prism 2 are chosen in such a way that the prism constitutes a support for the nasal saddle of the glasses, which is coming in contact with the lateral sides of the trapezoidal prism 2.

The trapezoidal prism is the most rigid component of the spectacle case and can be made of plastic material or any other rigid material comparable to it. Its side faces that come in contact with the nasal saddle of the glasses can be lined with various soft materials for protection. Its interior may be full or empty. One of the closure components of the spectacle case is placed on the trapezoidal prism 2 , and the second component is placed on the rear face b. In the variant of the spectacle case illustrated in the figure 1, the closure is a metallic staple with the components f and g.

The spectacle case is used in the following way: open the spectacle case, place the unfolded glasses with the nasal saddle on the trapezoidal prism 2 - figure 3, then fold the spectacle case, close with the closing device and fold the glasses' temples - fig. 4 and figure 5.

It is noteworthy that the spectacle case can also be attached in reverse, the front side of it thus becoming the rear side, and the rear side becoming the front side - figure 6, figure 7 and figure 8.

Depending on your preferences, you can choose a spectacle case with curved sides according to the curvature of your glasses, and in this case the spectacle case could be closed either in the rear side - figure 9 or in the front only.

The closing device can be a metallic or plastic staple, but can also be a magnetic staple - figure 10 or Velcro - figure 11 , or buttons or other known closing devices may be used. For easier placement of the glasses in the spectacle case, the top of the trapezoidal prism can be replaced with a rounded shape as can be seen in figure 12.

For an even easier use of the spectacle case, the anterior part of the trapezoidal prism, as well as its corresponding portion from the front, may be missing, thus obtaining an empty space inside the prism - figure 3, a space that is useful for the user who can thus fix easier the spectacle case with the fingers - figure 14.

For additional lens protection, the spectacle case can be provided on the front side also with some pockets h where the bottom of the lens enters - figure 15.

For a small thickness of the spectacle case, the trapezoidal prism can have a smaller thickness, in this case the nasal saddle of the glasses being partially supported on the parallelepiped - figure 16. In this case the rear side of the spectacle case will be provided with some openings, slots or holes i and j letting the nose pads to come out partially or totally from the spectacle case - figure 17.

A particular variant of the spectacle case is obtained by totally removing the prism, so the openings, the slots or the holes i and j are remaining on the rear face thus helping to fix the glasses in the spectacle case - figure 18 and figure 19.