CN202180672U - three-sided writing board - Google Patents

Abstract

The utility model discloses form by the inseparable amalgamation side by side of the same positive triangular prism of polylith, every positive triangular prism can both rotate in unison around the fixed axle that is located central line separately, and the side of all positive triangular prisms can form the plane of writing of three same area, alright write after fixed. The utility model discloses in the color of each face of every regular triangular prism can be as required and different to be suitable for different writing tools, especially when the one side in every regular triangular prism is white, the white plane that makes up can be used as projection screen. Under the condition that occupies the same area, the utility model discloses a write the area and be three times of old-fashioned blackboard, greatly increased information capacity has also reduced the number of times of cleaning. The utility model provides an every triangular prism can the level place also can vertically place. The utility model discloses trilateral clipboard exclusive use also can a plurality of combination uses, still can use with current blackboard combination. The utility model can be fixed on the wall and can be supported by a support to be placed vertically. The utility model discloses construct novel simple, increase and write the area and show, be fit for writing and show the instrument in teaching and various exhibition activities.

Description

three-sided writing board

technical field

The utility model belongs to stationery and educational supplies, in particular to a three-sided writing board. the

Background technique

Existing writing boards generally can only be used on one side, have a fixed area, limited capacity, and a single color on the board surface. the

Contents of the invention

This new type is made up of several identical regular triangular prisms arranged side by side. Each regular triangular prism can rotate uniformly around the fixed axis located on its own center line. The sides of all regular triangular prisms can form three writing planes with the same area. can write. The color of each face of each regular triangular prism in the present model can be different according to needs, so as to be suitable for different writing implements, especially when one side in each regular triangular prism is white, the white plane that is combined can be used as a projection screen. . In the case of occupying the same area, the writing area of the new type is three times that of the old-fashioned blackboard, which greatly increases the information capacity and reduces the number of times of wiping. Each triangular prism in the present model can be placed horizontally and also can be placed vertically. The novel three-sided writing board can be used alone or in combination, and can also be used in combination with the existing blackboard. The utility model can be fixed on the wall and can also be supported vertically by a support. The utility model has a novel and simple structure, significantly increases the writing area, and is suitable for teaching and various exhibition activities as a writing and display tool. the

Description of drawings:

Fig. 1 is a schematic diagram of the structure of each regular triangular prism in the three-sided writing board when it is placed vertically, wherein A represents one of the regular triangular prisms, B represents the fixing device for the rotating shaft of the regular triangular prism and the frame of the writing board, and C represents the rotating shaft located at the center line of the regular triangular prism.

Fig. 2 is a side view structural schematic diagram of a three-sided writing board, wherein D represents the fixing device of the rotating shaft of the regular triangular prism and the frame of the writing board, and E represents a regular triangular prism equipped with a rotating shaft.

Specific implementation method: Select multiple identical triangular prisms, install a rotating shaft on the center line of each triangular prism, let the triangular prisms fit side by side closely, and install them on the fixing device. Each triangular prism can be rotated uniformly to form three uniform writing surfaces. The utility model can utilize the existing equipment of the furniture factory and the blackboard manufacturing factory to mass-produce, and the cost is low and the use efficiency is high. When a plurality of the present inventions are used in combination or in combination with an existing blackboard, it is more remarkable to increase the writing area.

Claims (2)

1. The three-sided writing board is made up of the same regular triangular prisms side by side. Its characteristics are: each regular triangular prism can rotate around a fixed axis located on its own center line, and the sides of multiple regular triangular prisms can form three writings of the same area. flat. 2. The three-sided writing board according to claim 1, characterized in that: the combined white plane can be used as a projection screen. 3 . The three-sided writing board according to claim 1, wherein each triangular prism can be placed horizontally or vertically. 4 . The three-sided writing board according to claim 1 is characterized in that it can be used alone or in combination, and can also be used in combination with an existing blackboard.

Images