The invention concerns a supporting system for display panel cases, which allows simple installation and storing of large-size display panels such as various wall maps, projection screens, and the like. The invention belongs to the IPC class G 03B/56.

The technical problem which is successfully solved by the claimed supporting system for display panel cases, consists in constructing and

carrying out a case or a group of cases that will make possible simple placing of a display panel into position and storing it, the use of several display panels with the possibility of selecting between them, and will - in addition - be simple to use and suitable for production in large series.

The stand of a display panel, e.g. a wall map or a projection screen, is usually carried out in the form of a supporting pole, placed into position prior to projection or display of the map, which is hanged on it. The stability of the complete stand depends on the design and weight of the supporting pole's base. Inversely proportional to its stability, however, is the ease of assembling and portability of such a stand. Besides, the use of said stands is time-consuming and impractical when several panels need to be displayed within short time intervals or simultaneously. Last but not least, the display panel has to be put away when the displaying is concluded.

Solutions exist, particularly for projection screens, in which the display surface is rolled up and put in a case that is separately fixed to a stand. The drawbacks regarding the stability and possibility of installing several stands are the same as in the above described example.

The supporting system for display panel cases in accordance with the invention, which makes it possible to eliminate the enumerated drawbacks of known solutions, is carried out so that cases are clamped between two supporting elements, and display panels (maps, projection screens, etc.) are rolled up in them; the pulling out of the display panels into the displaying position can be controlled manually by sticking a pin in the displaying position, through self-locking in the displaying position, or through a motor

drive.

The invention will be described by way of example and with reference to the accompanying drawings in which:

Fig. 1 is an axonometric view in partial cross-section of a supporting system for display panel cases, and

Fig.2 is a cross-section of a detail of a display panel case.

Figure 1 illustrates a supporting system for display panel cases in axonometric view and partial cross-section. The supporting system consists basically of cases 2, 2a,...2n of display panels 3, 3a,...3n clamped between two supporting elements 1, 1a. Each 2, 2a,...2n case has the form of a long tube fitted with a slot through which the display panel can be pulled out. On one side of the case 2, 2a,...2n, there is a self-locking mechanism 4, or - in a variant solution - an electromotor 6. The self-locking mechanism 4 is carried out on supporting beams 5 of the display panels 3, 3a,...3n, while the electromotor 6 is mounted so that its axle extends directly into the supporting beam 5' of the display panels 3, 3a,...3n.

These details are illustrated in Fig.2.

The use of a supporting system for display panel cases is simple. With regard to the required number of cases (usually from 1 to 5 cases), the supporting elements 1, 1a are shaped which are fixed to the wall, or to some other similar place, at a convenient height. The cases 2, 2a,...2n are placed in parallel one beside the other. The cases may have optional -

usually combined - contents. In two to three cases there are maps, in one there is a projection screen. Also the systems for pulling the panels into displaying position are optional, while the form and size of the case 2, 2a,...2n remains the same for all systems.

For the production of the cases 2, 2a,...2n one can use standard aluminium tubes fitted with a slot through which the display panels 3, 3a,...3n can be pulled. Since the ends of the aluminium tubes are not discontinued by the slot, the case itself is strong enough and the axle holders can be made of standard, round PVC plastic, and need not be specially sprayed onto the ends.

The entire supporting system for display panel cases is designed so that it can be installed as an independent unit fixed to the wall or to the ceiling.

In a system of display panel cases with different contents, the projection screen is always placed so that, when pulled out, it allows perpendicular projection (not a distorted or extended picture) with respect to the position of the projection apparatus.

Through a combination of several systems in accordance with the invention, simultaneous use of three teaching aids is made possible, e.g. of a map, a projection screen and a blackboard.

The claimed structure of the supporting system for display panel cases in accordance with the invention successfully solves the given technical problem, and in addition, allows simple positioning of display panels into the displaying position as well as their storage.