| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in that in order to make a projector movable only in a direction perpendicular to a screen, a base substrate with a guide groove is required, resulting in increase in the size of the device. SOLUTION: The projection 1 with casters has the casters 5 that facilitate vertical movement in relation to the screen 3. Each of the caters 5 includes: a support member 41 having a through-hole and attached to the underside of the main body of the projector so as to be freely slid vertically; a wheel 44 having a cylindrical shape, and attached to the support member in the direction in which its periphery serves as an installation face and the wheel is rotated perpendicular to the screen; an elastic member 45 disposed around the support member; and a stopper 45 having a rod-like shape, fixed to the projector main body at one end, mounted by its being inserted into the through-hole of the support member, and used to stop rotation of the wheel such that when the projector is installed, the other end presses the installation face of the wheel by its weight. COPYRIGHT: (C)2009,JPO&INPIT
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