| 摘要 |
Sign-board device having exchangeable signs comprising a plate (1) vertically disposed on a level which is normally out of reach and a number of signs (2, 2A) intended to be detachably attached to the plate. On the surface of said signs (2, 2A) which is turning away from said plate (1) each of said signs is provided with a case (6) open at the botton and extending in the vertical direction of the sign for introduction therein of a rod (3), by means of which the sign can be lifted up to the level of the plate (1) and be brought into contact with the plate. On the plate (1) and/or on each of said signs (2, 2A) are attached elements (4, 5) adapted to detachably hold the sign to the plate on contact between the plate (1) and respective sign (2, 2A). Preferably said elements (4, 5) are permanent magnets. If the signs (2, 2A) are made of magnetic material, e.g. iron plate or steel plate, magnets (5) are attached only to the plate (1) and disposed in positions which correspond to the intended location of the signs. If the signs (2, 2A) are made of non-magnetic material, e.g. plastic material, one orseveral magnets (4) are attached to the surface of the signs which is intended to face the plate (1), said magnets being detachably held to the plate by means of magnetic attraction when brought into contact with the plate (1) or part thereof. |
