| 摘要 |
A plastic ventilation window structure includes a left/right side bracket, an upper/lower side bracket, support members, closure members, and a plurality of slats wherein the left and right side brackets have a recessed engagement groove indented at the corresponding inner side thereof respectively, and a pair of retaining ribs each having a slant tapered guide facet defining one end thereon properly protruding at the inner wall of the recessed engagement groove thereon. The closure member has a pair of arc and tapered guide ribs and stop ribs symmetrically extending at both lateral sides thereon to define a pair of retaining cavities there-between. In assembly, the retaining ribs of the recessed engagement grooves are precisely located at the retaining cavities of the closure members therein and closely limited in place at the guide ribs and stop ribs of the closure members there-between to locate the closure members stably at the left/right side brackets therein without detaching from the recessed engagement grooves thereof while the slats are pivotally rotated upwards or downwards by a linkage rod. In case of a smaller window frame, the closure members are reinforced in strength and securely held in place without the support members being applied thereto, economically saving the time and cost of processing to achieve the economical efficiency and boost the competitive power thereof.
|
