blind box
Introduction
A blind is a mechanical element that is placed on the outside or inside of a balcony or window to regulate the passage of light and control privacy.[1] Blinds can be made of different materials, although PVC plastic and aluminum are the most popular due to their lightness and resistance to deterioration. The blind has a double opening and closing movement that generally manifests itself in an up and down action. The most common system consists of rolling it up to collect it on an upper drum and unrolling it to deploy it. To do this, the blind is made up of slats that fold or roll up in the case of roller blinds.
Etymology
The origin of the word "persiana" comes from the French persienne, which, as in Spanish, means inhabitant of Persia, because in the century it was said that these came precisely from that region. In ancient times, its function was covered by shutters.
The first Venetian blinds were introduced by Hunter Douglas around 1946.
Components
Drive mechanisms
The most common mechanisms to move a blind are:.
Thermal and sound bridge
Exterior blinds (especially the drawers of roller blinds) are large thermal and sound bridges, which facilitate the entry of cold, heat and noise into the home, which is why it is necessary to use drawers or insulating sheets.
Guys
Contenido
Los grandes tipos son las exteriores y las interiores a la ventana.
Las exteriores tienen la ventaja de que protegen el cristal cuando llueve, evitando así el tener que limpiarlo . Como desventaja se encuentra que son puentes térmicos, por lo que necesitan aislarse o a veces suelen sustituirse por contraventanas.