The invention discloses an adjustable protection window used for
building construction. The adjustable protection window comprises a
chassis. The
chassis is provided with four adjusting jigs. Each adjusting jig is formed by an inner
pipe, an outer
pipe, an expansion link, a sleeve, a side board, a moving rod, stretchable legs, a protection frame, and a lever
assembly. The outer end of the outer
pipe is fixedly connected with the middle part of the side board. The inner end of the inner pipe is fixedly connected with the
chassis. The center of the chassis is provided with a
cam which can rotate or lock. When the
cam rotates, the expansion link is pushed outward. The lever
assembly of each adjusting jig is provided with a left group and a right group which are symmetrically arranged on two sides of the outer pipe. Each group of the lever
assembly is formed by a first hinge base, a second hinge base, a third hinge base, a fourth hinge base, a first lever, a second lever, a third lever, and a fourth lever. The adjustable protection window used for
building construction can be firmly installed in window holes through rotating the
cam. The window has an antitheft effect, and installation is convenient, and the window can be repeatedly used.